Cargo loader

Abstract

This disclosure provides a cargo loader 10 comprising a tractor assembly 100 and a vertical adjustment assembly 200 supported by the tractor assembly 100. The vertical adjustment assembly 200 comprises a base 230, a deck platform 220 connected to the base 230 by a lifting mechanism 240, and a plurality of support columns 236 extending vertically from the base 230. The deck platform 220 further comprises a plurality of rollers 222. The lifting mechanism 240 is configured to contract and extend vertically such that the height of the deck platform 220 changes between a contracted height and an extended height. The height of each support column 236 is higher than the contracted height and lower than the extended height of the deck platform 220.

Description

Technical Field

[0001] (Priority Claim) This application claims the benefit of priority of U.S. Provisional Application No. 63 / 454,041, filed Mar. 22, 2023, and incorporates by reference in its entirety for all purposes.

[0002] The subject matter disclosed herein generally relates to cargo loaders, and more specifically to multi-purpose cargo loaders with interchangeable attachments.

Background Art

[0003] With the progress of global globalization and economic growth, the activity levels and handling volumes in the transportation industry have been significantly increasing. Cargo loaders always function as indispensable tools for cargo movement in the transportation industry and are frequently used to load or unload cargo, materials, supplies, commodities, merchandise inventories, pallets or equipment from one facility to another. Cargo loaders are widely used in a variety of industries including aviation, shipping, rail, trucking and logistics.

[0004] Conventionally, cargo loaders may include forks, lifters, articulating arms or other lifting mechanisms to assist in lifting and repositioning objects. However, heavy or bulky objects may require a certain number of personnel and are difficult because they require labor and time.

[0005] Solutions such as adding rollers or cylinders to reduce the friction between the object and the platform of the cargo loader have been attempted to reduce the input force when positioning the object on the platform of the cargo loader. However, rollers and cylinders may cause the object to accidentally slide or fall while the cargo loader is moving, which may lead to an unpredictable and dangerous situation.

[0006] Furthermore, cargo loaders are often limited to a single function, and their protruding forks, risers, or articulated arms occupy a significant amount of space during storage. [Overview of the project] [Problems that the invention aims to solve]

[0007] Therefore, there is a need for a cargo loader that offers multi-functionality, features interchangeable attachments that can be stored compactly, and facilitates the loading, rearrangement, and unloading of objects in a safe, convenient, and efficient manner. [Means for solving the problem]

[0008] The following is a summary of the invention presented herein, primarily intended to provide a preliminary understanding of certain aspects of the invention. However, this summary is not intended to provide a comprehensive overview of the invention, nor to identify or describe any important elements or boundaries of the invention. The sole purpose of this summary is to provide a basic understanding of the concept and features of the invention, which will be discussed in more detail later.

[0009] This disclosure relates, in general terms, to a cargo loader that facilitates the loading, rearranging, and unloading of objects. One non-limiting embodiment (hereinafter referred to as the "exemplary embodiment") provides a cargo loader that generally comprises a tractor assembly and a vertical adjustment assembly.

[0010] The cargo loader may further comprise a tilting assembly, a ramp assembly, a sheave assembly, a guide member set, and several attachments. A mounting bracket is further positioned at the front end of the deck platform. The attachments include a fork riser assembly for lifting, various fork extensions, and a ramp set for self-propelled loading, and are interchangeably and detachably mounted to the mounting bracket.

[0011] The tractor assembly comprises a continuous travel zone and an engine compartment. The engine compartment is mechanically coupled to the continuous travel zone, vertical adjustment assembly, tilt assembly, and fork riser assembly, supplying them with mechanical energy. Preferably, the cargo loader further comprises a hydraulic system driven by the engine compartment to supply greater force for heavy loads. Other mechanical mechanisms for supplying mechanical energy to the cargo loader may be used without departing from the spirit of the invention.

[0012] The vertical adjustment assembly is supported by the tractor assembly and further comprises a base and a deck platform. The deck platform is positioned above the base and connected to the base by a lifting mechanism and is adjusted to a predetermined height. The vertical adjustment assembly is configured to contract and extend vertically, so that the height of the deck platform changes between a predetermined contracted height and a predetermined extended height. Multiple rollers are positioned on the deck platform, thereby allowing palletized cargo on the deck platform to be easily moved. Preferably, the lifting mechanism comprises a scissor lift. The scissor lift comprises at least two scissor link sets. Each scissor link set is rotatably connected at a central connecting member and comprises two arms. However, without departing from the spirit of the invention, other lifting mechanisms such as a telescopic lift may be used to adjust to the desired height.

[0013] Multiple support columns extend vertically from the base, with each column being taller than the retracted height of the deck platform and shorter than the extended height. The columns are arranged in an array that evenly distributes the weight of the object being lifted. Preferably, an equal number of columns are arranged symmetrically on both sides of the base. The deck platform may further include a head frame along its periphery. The head frame further includes two or more receiving sections configured to receive and allow the columns to pass through.

[0014] Therefore, when the deck platform extends to a height greater than the support columns, the rollers propel the pallets forward, facilitating the loading or unloading of pallets. Conversely, when the deck platform retracts to a height lower than the support columns, the columns lift the pallets from the rollers, preventing them from sliding or falling off the deck platform while the cargo loader is in motion.

[0015] The above features and advantages will become clear from the following detailed description, which is referenced along with the attached drawings. [Brief explanation of the drawing]

[0016] [Figure 1] Figure 1 is a front perspective view of a cargo loader according to a non-limiting and exemplary embodiment (exemplary embodiment) that includes a fork riser. [Figure 2] Figure 2 is an exploded view of a cargo loader according to an exemplary embodiment. [Figure 3] Figure 3 is a second front perspective view of a cargo loader in an exemplary embodiment with the deck platform in the extended position. [Figure 4] Figure 4 is a third front perspective view of an exemplary embodiment of a cargo loader having a first fork extension with the deck platform in a retracted position. [Figure 5] Figure 5 is a right-side perspective view of an exemplary embodiment of a vertical lifting assembly in its extended position. [Figure 6] Figure 6 is a partially exploded view of an exemplary embodiment of a cargo loader with an inclined assembly. [Figure 7] Figure 7 is an exploded view of the tilting assembly. [Figure 8] Figure 8 is a partially exploded view of the top plate of the inclined assembly. [Figure 9] Figure 9 is a side view of a cargo loader tilted forward. [Figure 10] Figure 10 is a rear perspective view of a fork riser having a rotatable second fork extension. [Figure 11]FIG. 11 is a perspective view of a rack for storing a lamp set. [Figure 12] FIG. 12 is a diagram schematically showing a lamp set attached to a cargo loader. [Figure 13] FIG. 13 is a side view of a pallet disposed on a deck platform and lifted by a plurality of columns. [Figure 14] FIG. 14 schematically shows a cargo loader that relocates a pallet from a platform by a fork extension. [Figure 15] FIG. 15 is a perspective view of a cargo loader of an exemplary embodiment having a third fork extension.

Best Mode for Carrying Out the Invention

[0017] The following detailed description and the accompanying drawings provide a comprehensive disclosure of exemplary embodiments for the purpose of enabling those skilled in the art to make and use the present invention. Accordingly, the detailed description and illustration of one or more exemplary embodiments presented herein are purely exemplary and are not intended to limit the scope or protection of the invention in any way. Further, the drawings are not necessarily to scale, and some descriptions that are well known and unnecessary for understanding, such as descriptions of manufacturing and assembly, may be omitted. In this specification, "upper", "lower", "left", "rear", "right", "front", "vertical", "upper surface", "lower surface", "side" and their derivatives shall correspond to the orientation of the device shown in FIG. 1. Further, it is not intended to be bound by any explicit or implicit theory stated in the technical field, background art, summary of the invention or the following detailed description.

[0018] This specification discloses a cargo loader 10 according to a non-limiting and exemplary embodiment (hereinafter referred to as "exemplary embodiment"). The cargo loader 10 according to the exemplary embodiment is interchangeably and detachably coupled to various attachments and serves multiple purposes. The cargo loader 10 preferably facilitates the safe transport of objects, preferably palletized cargo 610, on unpaved or harsh environmental surfaces (including, but not limited to, mud, water, snow, terrain and tarmac surfaces). Furthermore, the cargo loader 10 supports the easy loading and unloading of the transported objects onto an aircraft or vehicle and provides the user with the option of self-propelled loading.

[0019] Referring to Figures 1 and 2, an exemplary embodiment of the cargo loader 10 comprises a tractor assembly 100, a vertical adjustment assembly 200, a tilt assembly 300, a ramp assembly 400, and a detachable and replaceable fork riser assembly 500. In Figure 2, the fork riser assembly 500 is replaced by a first fork extension 280 as shown, and in Figures 3 and 4, it is removed from the cargo loader 10. The vertical adjustment assembly 200 is supported by the tractor assembly 100, and the tilt assembly 300 is positioned between the vertical adjustment assembly 200 and the tractor assembly 100. Preferably, the ramp assembly 400 is coupled to the rear end of the engine compartment 110.

[0020] Continuing to refer to Figure 2, to support the movable parts and movement of the cargo loader 10, the tractor assembly 100 further comprises an engine compartment 110, a lower plate 120, and a continuous travel strip 130, which are operably coupled to one another. The engine compartment 110 supplies mechanical energy to the cargo loader 10. The engine compartment 110 is preferably mechanically coupled to a hydraulic system (not shown) and provides power and control for heavy loads to the movable parts of the cargo loader 10, including the continuous travel strip 130, a vertical adjustment assembly 200, a tilting assembly 300, and a fork riser assembly 500. The continuous travel strip 130 is suitable for rough or harsh surfaces. The lower plate 120 further comprises two hinge leaves 122 and two guide rails 124 configured to be coupled to the tilting assembly 300. The tractor assembly 100 may be modified, without departing from the spirit of the invention, to facilitate the movement of the cargo loader 10, for example, by adding wheels. Furthermore, the cargo loader 10 may be controlled by remote control or a wired control panel.

[0021] As shown in Figure 5, the vertical adjustment assembly 200 further comprises a longitudinal base 230, a longitudinal deck platform 220 positioned above the base 230, and an adjustable lifting mechanism 240 mounted between the base 230 and the deck platform 220. The base 230 and the deck platform 220 each have a top surface, a bottom surface, a front surface, a back surface, and two side surfaces, respectively. Preferably, the lifting mechanism 240 comprises a scissor lift having at least two spaced-apart scissor link sets 240. Each scissor link set 240 is rotatably coupled to both ends of a central connecting member 246. Each scissor link set 240 further comprises an outer arm 242 and an inner arm 244. The outer arm 242 and the inner arm 244 each have upper ends 242a, 244a and lower ends 242b, 244b, respectively. Each outer arm 242 is rotatably mounted to the center of the inner arm 244 and rotates around a central connecting member 246. The upper ends 242a, 244a of the scissor link set 240 are operably and mechanically coupled to the underside of the deck platform 220, and the lower ends 242b, 244b of the scissor link set 240 are operably and mechanically coupled to the upper side of the base 230. Furthermore, the scissor link set 240 is mechanically coupled to a plurality of first hydraulic cylinders 250 connected to a hydraulic system. This configures the scissor link set 240 to contract and extend vertically so that the height of the deck platform 220 can be adjusted to a desired height and vary between a contracted height (Figure 1) and an extended height (Figure 3).

[0022] The base 230 may further comprise a base plate 234 and a base frame 232 along the periphery of the base plate 234. Multiple support columns 236 extend vertically from the base frame 232. The height of each support column 236 is greater than the retracted height of the deck platform 220 and less than the extended height. In an exemplary embodiment, the support columns 236 on both sides of the base 230 are configured in a rectangular parallelepiped shape and are arranged symmetrically in equal numbers to evenly distribute the weight of the palletized cargo 610. However, the number, arrangement, and shape of the support columns 236 can be changed without departing from the spirit of the invention. Furthermore, multiple rollers 222 are positioned on the deck platform 220 to facilitate the movement of the palletized cargo 610 on the deck platform 220.

[0023] The vertical adjustment assembly 200 may further comprise a head frame 210 along the periphery of the deck platform 220. The head frame 210 includes two head side members 212, a head front member 214, and a head rear member 216. As shown in Figure 4, each head side member 212 further comprises one or more receiving portions 218 configured to receive the support column 236 and to pass through the head frame 210. Furthermore, to securely fasten the palletized cargo 610 to the deck platform 220, a plurality of rings 219 for receiving securing straps may be added to each head side member 212.

[0024] Continuing to refer to Figure 5, the mounting bracket 260 attached to the head front member 214 is configured to be coupled to a number of interchangeable and detachable attachments, including the fork riser assembly 500 shown in Figure 1, the first fork extension shown in Figure 4, the ramp set 420 shown in Figure 12, and the third fork extension shown in Figure 15. The mounting bracket 260 further comprises an upper bar 262 and a lower bar 264. The upper bar 262 and the lower bar 264 are spaced apart from each other and each has a locking groove 265. An upper extension 266 extending upward from the upper bar 262 further comprises two ramp connecting rods 268 configured to be coupled to the ramp set 420. Furthermore, the mounting bracket 260 may further comprise a hitch receiver 269 as a coupling mechanism for further attachments to a trailer, work equipment, or machinery.

[0025] Furthermore, the deck platform 220 includes a tailstock set 270 located on the head rear member 216. The deck platform 220 further includes a pallet stopper 272 located at the rear end, and a sheave assembly 274 and guide member set 276 for facilitating self-propelled loading. The pallet stopper 272 holds the palletized cargo 610 when the vertical adjustment assembly 200 is tilted rearward, thereby preventing the palletized cargo 610 from sliding along the tilt angle.

[0026] Referring to Figures 6-9 in conjunction with Figure 2, the tilting assembly 300 comprises a top plate 310 having an upper and lower side, a bottom plate 320, and two second hydraulic cylinders 322. One end of each second hydraulic cylinder 322 is mechanically coupled to the top plate 310 at a top cylinder mounting portion 318 (Figure 8), and the other end is mechanically coupled to the bottom plate 320 at a bottom cylinder mounting portion 324 (Figure 7). The upper surface of the top plate 310 is attached to the lower surface of the base 230 of the vertical adjustment assembly 200. This allows the deck platform 220 of the vertical adjustment assembly 200 to tilt forward and backward, as shown in Figure 9. The lower surface of the top plate 310 further comprises two longitudinal support members 312 spaced apart from each other. The support members 312 are positioned perpendicular to the lower surface in the central part of the top plate 310. A crossbar 314 is mounted near the center between the two support members 312. The crossbar 314 is secured to the two support members 312 by two flange bearings 316. Each support member 312 has a substantially inclined shape with two slanted sides adjacent to the bottom plate 320 and is rotatably mounted to the bottom plate 320, thereby allowing the top plate 310 to tilt, preferably, to an angle of inclination of 15 degrees forward and 5 degrees backward. The bottom plate 320 further comprises an upwardly extending rear plate 334 and two side plates 330. The rear plate 334 is provided with hinge tabs 340. Multiple wheels 332 are rotatably mounted on the two side plates 330. The wheels 332 slide along the guide rails 124 of the tractor assembly 100 (Figure 2), and the hinge tabs 340 are coupled to the hinge leaves 122 of the lower plate 120 of the tractor assembly 100.

[0027] Referring to Figure 10 together with Figure 2, the fork riser assembly 500 comprises two vertical frames 510, two vertical guide tracks 520 movably coupled to each vertical frame 510, a fork set 530 movably coupled to the two vertical guide tracks 520, and a third hydraulic cylinder 540. Each of the two vertical frames 510 and each of the two vertical guide tracks 520 has outer sides 510a, 520a and inner sides 510b, 520b, respectively. A set of first rollers 512 is rotatably mounted on the inner side 510b of each vertical frame 510. The inner side 520b of each guide track 520 further comprises a guide plate 522 and a set of second rollers 524 rotatably coupled to the guide plate 522. This allows the guide plate 522 to slide along the guide track 520. The fork set 530 is further coupled to the guide plate 522 by a front brace 526. A third hydraulic cylinder 540 is connected to the hydraulic system and mechanically coupled to the two guide tracks 520 and the fork set 530. Thus, the two guide tracks 520 are movable up and down relative to the vertical frame 510, and the fork set 530 is movable up and down relative to the two guide tracks 520. To mount the fork assembly 500 to the mounting bracket 260 of the vertical adjustment assembly 200, each of the two vertical frames 510 further comprises an upper connector 514 and a lower connector 516. The upper connector 514 engages with a locking groove 265 of the upper bar 262, and the lower connector 516 engages with a locking groove 265 of the lower bar 264. As shown in Figure 10, the fork set 530 comprises a rotatable second fork extension 532 that rotates parallel or perpendicular to the two vertical frames 510.

[0028] Referring to Figures 11-12 in conjunction with Figure 2, as previously described, the ramp assembly 400 is coupled to the rear end of the engine compartment 110. The ramp assembly 400 further comprises a ramp rack 410 for housing a foldable ramp set 420. The ramp set 420 folds when stored and unfolds to couple with the vertical adjustment assembly 200 when tilted forward. The ramp set 420 is coupled to the mounting bracket 260 by a ramp connecting rod 268. Furthermore, the ramp set 420 may comprise a support 430 for supporting the ramp set 420. Advantageously, the user can utilize the ramp set 420 together with the sheave assembly 274 and the guide member set 276 to facilitate the self-propelled loading of the pallet 600.

[0029] To further demonstrate the convenience and safety of the cargo loader 10, an exemplary method of using the cargo loader 10 is presented. Some of the steps can be reordered. An equivalent application of one or more of the reordered steps does not substantially alter the spirit of the invention.

[0030] First, in order to load the palletized cargo 610 onto the deck platform 220, the user operates the remote control or wired control panel to extend the vertical adjustment assembly 200 to a height greater than or equal to the support column 236, for example, as shown in Figure 3. This allows the palletized cargo 610 to come into contact with the rollers 222, making it easy to position the palletized cargo 610 on the deck platform 220. After loading the palletized cargo 610 is complete, the user retracts the vertical adjustment assembly 200 to a height lower than the support column 236, for example, as shown in Figure 13, separating the palletized cargo 610 from the rollers 222 and lifting it with the support column 236. The user may then move the cargo loader 10 to the desired position. Since the palletized cargo 610 is not in contact with the rollers 222, the risk of the palletized cargo 610 sliding or falling off the deck platform 220 during the movement of the cargo loader 10 is reduced. Upon arrival at the destination, the user extends the vertical adjustment assembly 200 to a height greater than or equal to the support column 236. The rollers 222 facilitate the loading and unloading of the palletized cargo 610. If the pallet is relatively heavy, the user may use the ramp set 420 to assist in loading and unloading the palletized cargo 610.

[0031] To reposition palletized cargo 610 from platform 600, the user may add fork risers 500 or first and third fork extensions 280, 710 as shown in Figures 2, 14, and 15. The first and third fork extensions 280, 710 are raised or lowered by the contraction and extension of the vertical adjustment assembly 200.

[0032] Advantageously, the support column 236, along with the vertical movement of the vertical adjustment assembly 200, allows for safer transport of palletized cargo 610 or other supplies. Detachable and interchangeable attachments provide versatility to the cargo loader 10. Furthermore, the cargo loader 10 can be easily housed in aircraft such as the MV-22, CH-53E, CH-47, C-130, or C-17.

[0033] While embodiments of the present invention have been disclosed, those skilled in the art can make certain modifications to the invention without departing from the spirit of the invention. [Explanation of symbols]

[0034] 10: Cargo loader 100: Tractor Assembly 110: Engine compartment 120: Lower plate 122: Hinged leaf 124: Guide rail 130: Continuous running zone 200: Vertical Adjustment Assembly 210: Head frame 212: Head side component 214: Head front component 216: Head rear component 219: Ring 220: Deck Platform 222: Laura 230: Bass 232: Base frame 234: Base plate 236: Strut 240: Lifting mechanism / Scissor link set 242: Outer arm 242a:Top edge 242b: Bottom edge 244: Inner arm 244a:Top edge 244b: Bottom edge 246: Central connecting material 250: First hydraulic cylinder 260: Mounting bracket 262: Top bar 264: Bottom bar 265: Locking groove 266:Top extension 268: Lamp connection rod 269: Hitch Receiver 270: Tailstock Set 272: Pallet stopper 274: Sheave Assembly 276: Guide component set 280: First fork extension 300: Inclined Assembly 310: Top plate 312: Support member 314: Crossbar 316: Flange bearing 318: Top cylinder mounting section 320: Bottom plate 322: Second hydraulic cylinder 324: Bottom cylinder mounting section 330: Side Plate 332: Wheel 334: Rear plate 340: Hinge tab 400: Lamp Assembly 410: Lamp rack 420: Lamp Set 430:Support 500: Fork riser assembly 510: Vertical Frame 510a: Outer side 510b: Inside side 512: Laura 1 514: Upper connector 516: Lower connector 520: Guide Track 520a: Outer side 520b: Inside side 522: Guide Plate 524: The Second Laura 526: Front Brace 530: Fork Set 532: Second fork extension 600: Platform 610: Palletized cargo 710: Third fork extension

Claims

1. Tractor assembly and A vertical adjustment assembly supported by the aforementioned tractor assembly, A cargo loader equipped with, The vertical adjustment assembly comprises a base and a deck platform mechanically connected to the base by a lifting mechanism, The aforementioned deck platform is equipped with multiple rollers, The lifting mechanism is configured to contract and extend vertically, and the height of the deck platform changes between a predetermined contracted height and a predetermined extended height. The base further comprises a plurality of support columns extending vertically from the base, A cargo loader characterized in that the height of each of the plurality of support columns is higher than the retracted height of the deck platform and lower than the extended height.

2. The deck platform further comprises a head frame along the periphery of the deck platform, The cargo loader according to claim 1, wherein the head frame further comprises two or more receiving portions configured to receive and allow the plurality of support columns to pass through.

3. The cargo loader according to claim 1, characterized in that the lifting mechanism includes a scissor lift.

4. The cargo loader according to claim 1, further comprising a tilting assembly coupled between the vertical adjustment assembly and the tractor assembly, wherein the tilting assembly is configured to tilt the vertical adjustment assembly between a predetermined forward tilting angle and a predetermined rearward tilting angle.

5. The cargo loader according to claim 4, further comprising a ramp set detachably coupled to the vertical adjustment assembly at the forward tilt angle.

6. The cargo loader according to claim 1, wherein the tractor assembly further comprises an engine compartment mechanically connected to a hydraulic system.

7. The cargo loader according to claim 6, characterized in that the lifting mechanism is mechanically connected to the hydraulic system.

8. Tractor assembly and A vertical adjustment assembly supported by the aforementioned tractor assembly, A cargo loader equipped with, The vertical adjustment assembly comprises a base, a deck platform mechanically connected to the base by a lifting mechanism, and a head frame along the periphery of the deck platform. The aforementioned deck platform is equipped with multiple rollers, The lifting mechanism is configured to contract and extend vertically, and the height of the deck platform changes between a predetermined contracted height and a predetermined extended height. The base further comprises a plurality of support columns extending vertically from the base, The height of each of the plurality of support columns is greater than the retracted height of the deck platform and less than the extended height. A cargo loader characterized in that the head frame further comprises two or more receiving portions configured to receive and allow the plurality of support columns to pass through.

9. The cargo loader according to claim 8, characterized in that the lifting mechanism includes a scissor lift.

10. The cargo loader according to claim 8, further comprising a tilting assembly coupled between the vertical adjustment assembly and the tractor assembly, wherein the tilting assembly is configured to tilt the vertical adjustment assembly between a predetermined forward tilting angle and a predetermined rearward tilting angle.

11. The cargo loader according to claim 10, further comprising a ramp set detachably coupled to the vertical adjustment assembly at the forward tilt angle.

12. The cargo loader according to claim 8, wherein the tractor assembly further comprises an engine compartment mechanically connected to a hydraulic system.

13. The cargo loader according to claim 12, characterized in that the lifting mechanism is mechanically connected to the hydraulic system.

14. Tractor assembly and A vertical adjustment assembly supported by the aforementioned tractor assembly, A cargo loader equipped with, The vertical adjustment assembly comprises a base and a deck platform mechanically connected to the base by a lifting mechanism, The aforementioned deck platform is equipped with multiple rollers, The lifting mechanism is configured to contract and extend vertically, and the height of the deck platform changes between a predetermined contracted height and a predetermined extended height. The base further comprises a plurality of support columns extending vertically from the base, The height of each of the plurality of support columns is greater than the retracted height of the deck platform and less than the extended height. A mounting bracket connected to one end of the deck platform, An attachment that is interchangeable and detachably connected to the aforementioned mounting bracket, Furthermore, A cargo loader characterized in that the attachment includes a fork riser or a fork extension.

15. The deck platform further comprises a head frame along the periphery of the deck platform, The cargo loader according to claim 14, wherein the head frame further comprises two or more receiving portions configured to receive and allow the plurality of support columns to pass through.

16. The cargo loader according to claim 14, characterized in that the lifting mechanism includes a scissor lift.

17. The cargo loader according to claim 14, further comprising a tilting assembly coupled between the vertical adjustment assembly and the tractor assembly, wherein the tilting assembly is configured to tilt the vertical adjustment assembly between a predetermined forward tilting angle and a predetermined rearward tilting angle.

18. The cargo loader according to claim 17, further comprising a ramp set detachably coupled to the vertical adjustment assembly at the forward tilt angle.

19. The cargo loader according to claim 14, wherein the tractor assembly further comprises an engine compartment mechanically connected to a hydraulic system.

20. The cargo loader according to claim 19, characterized in that the lifting mechanism is mechanically connected to the hydraulic system.

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