Rear mast-type forklift chassis

Abstract

To provide a forklift capable of advantageously improving efficiency, load stability, a weight distribution, and safety.SOLUTION: An apparatus and related methods are related to a rear mast-type forklift chassis. In an illustrative example, the rear mast-type forklift chassis can include a fixed mast arranged behind the axle of forklift front wheels and extending along the longitudinal axis. The rear mast-type forklift chassis can include a forklift apparatus extending beyond the axle of the front wheel connected to the fixed mast. The rear mast-type forklift chassis can include a driver area arranged behind the fixed mast. The rear mast-type forklift chassis can include the forklift apparatus including a forklift pivotably coupled to a tilt swivel, coupled to a tilt cylinder configured to be extendable to adjust the forklift angle, and arranged in front of the axle of the front wheel.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This application claims the benefit of U.S. Provisional Application No. 63 / 618,766, entitled "Rearward Mast Forklift Chassis," filed on January 8, 2024, by Robert Chavez.

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 689,081, entitled "Rearward Mast Forklift Chassis," filed on August 30, 2024, by Robert Chavez.

[0003] This application incorporates by reference the entire contents of the foregoing applications herein.

[0004] Various embodiments generally relate to forklifts and the handling and transportation of goods.

Background Art

[0005] Forklifts can include, for example, industrial trucks designed to efficiently and accurately lift, transport, and stack materials. These vehicles can include, for example, a pair of forks attached to a liftable front end that provide a platform that can be used for multiple purposes to lift loads. A hydraulic system control can be used, for example, to control the raising and lowering of the forks, thereby allowing for precise adjustment to accommodate various load sizes and weights.

Summary of the Invention

Means for Solving the Problems

[0006] The apparatus and related method relate to a rear mast forklift chassis. In an exemplary instance, the rear mast forklift chassis can include a fixed mast extending along a longitudinal axis and disposed behind the axle of the front wheels of the forklift. The rear mast forklift chassis can include a forklift apparatus extending beyond the axle of the front wheels coupled to the fixed mast. The rear mast forklift chassis can include a driver area disposed behind the fixed mast. The rear mast forklift chassis can include a forklift apparatus including a forklift pivotally coupled to a tilt swivel and also coupled to a tilt cylinder configured to extend and retract to adjust the angle of the forklift and disposed in front of the axle of the front wheels. Various embodiments can advantageously improve efficiency, load stability, weight distribution, and safety.

[0007] Various embodiments can achieve one or more advantages. For example, the rear mast can naturally balance the load, for example, by moving the center of gravity to the rear of the machine. Balancing in this way can, for example, reduce the need to add a counterweight and / or, in some configurations, eliminate the counterweight, thereby enabling a lighter and more efficient forklift. Some embodiments can improve the driver's visibility by placing the mast behind the axle of the front wheels. For example, some embodiments can increase the driver's visibility and reduce blind spots by placing the mast behind the axle of the front wheels. For example, some embodiments can improve the more accurate handling of materials by placing the mast behind the axle of the front wheels. Some embodiments can advantageously optimize, for example, the weight distribution. Some embodiments can advantageously provide, for example, better load stability. Some embodiments can advantageously reduce, for example, the wear of the front axle and front tires. Some embodiments can improve, for example, the maneuverability in a narrow space.

[0008] Details of various embodiments are described in the accompanying drawings and the following description. Other features and advantages will become apparent from these descriptions, the drawings, and the claims.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0010] Like reference numerals in the various drawings indicate like elements.

[0011] To assist understanding, this document is structured as follows. First, to help introduce the discussion of various embodiments, a rear mast forklift chassis system is introduced with reference to FIG. 1. Next, following this introduction, some of the embodiments of the rear mast forklift chassis are described with reference to FIGS. 2 - 6.

[0012] Figure 1 shows an exemplary rear mast forklift chassis used in exemplary usage scenario 100. Usage scenario 100 includes forklift 105. Forklift 105 is transporting container 130. A container as shown in Figure 1 may be modeled, for example, as having a weight W. The container may include, for example, a liquefied petroleum gas (LPG) tank. The container may include, for example, a merchandise container. The container may include, for example, cargo. The container may contain, for example, a liquid. The liquid may include, for example, fuel.

[0013] Forklift 105 includes forklift apparatus 115. Forklift apparatus 115 is supporting load 130. The load may include, for example, a drum can. The load may include, for example, a rectangular parallelepiped container. The load may include, for example, a cube and / or square container. The load includes weight W as shown in Figure 1.

[0014] Forklift 105 includes counterweight 110. In some embodiments, the counterweight apparatus can, for example, optimize load balance. The counterweight apparatus may include, for example, an adjustable counterweight. Counterweight 110 may include, for example, a plurality of loads. The number of rear loads may be increased and / or decreased, for example, based on the front loads. The counterweight may be modeled, for example, as counterweight Wc as shown in Figure 1. The counterweight may include, for example, the weight associated with fuel tank 110a. The fuel tank may include, for example, a natural gas fuel tank. Counterweight Wc may be modularized, for example, based on the weight distribution of additional weights such as fuel tanks.

[0015] The forklift device 115 includes a tilt device 120. The tilt device 120 is coupled to a fixed mast 125. The fixed mass may be modeled to have a weight Wm, for example, as shown in FIG. 1. The fixed mast 125 includes a coupling region. The tilt device 120 can be coupled to the fixed mast 125 disposed behind the axle of the front wheels of the forklift, for example, in the coupling region.

[0016] The tilting device 120 can be configured to tilt within a predetermined angle range 145. The tilt device may be configured to tilt, for example, 6 degrees counterclockwise. The tilt device may be configured to tilt, for example, 6 degrees clockwise. The tilting device may be configured to tilt, for example, 10 degrees. The tilting device may be configured to tilt, for example, 4 degrees. The tilting device may be configured to tilt, for example, 8 degrees. The tilting device may be configured to tilt, for example, 5 degrees. The predetermined angle range may depend on external parameters such as, for example, the weight of the container, the type of forklift, and / or the type of cargo being transported. The predetermined angle may be referred to as θ, for example, as shown in FIG. 1.

[0017] The forklift 105 includes a set of front wheels and a set of rear wheels. The set of rear wheels can support, for example, a rearward vertical force N1. The set of front wheels can support, for example, a forward vertical force N2. These vertical forces may be equal to the total mass of the weights (e.g., Wc, Wm, W), for example. The position of Wm behind the front axle can reduce the forward moment of the axle and improve the cargo capacity W of the rear mast - forklift, for example.

[0018] The fixed mast 125 includes a roller assembly 135. The roller assembly 135 can be used, for example, to change the vertical orientation of the lift device and the tilting device. The rollers can be used, for example, to lift the lift device and the tilt device along the vertical path of the mast. The rollers can be used, for example, to lower the lift device and the tilting device along the vertical path of the mast.

[0019] The forklift 105 includes a driver area 140 disposed behind the fixed mast 125. The driver area can be covered, for example, by a head guard 150 fixed above the driver area and configured to protect the driver from falling objects.

[0020] In some embodiments, the lift device can operate smoothly by the rollers of the mast. These rollers can be attached, for example, to the mast channels and guide rails, whereby the lift bracket (e.g., the part holding the forks) can move up and down along the mast. The rollers can be used, for example, to reduce friction and allow the lift bracket to move vertically with less resistance. This can, for example, improve efficiency and the accurate lifting and lowering of loads.

[0021] In some embodiments, the mast of the forklift may include, for example, multiple stages, and each stage has its own set of rollers. The mast can, for example, be nested and / or telescopic. The rollers can, for example, make it easier to move the lift bracket smoothly. Proper maintenance of these rollers can, for example, improve the overall performance and lifespan of the forklift. Regular lubrication and inspection can, for example, make the rollers operate smoothly without problems.

[0022] In some embodiments, the transmission may be automatic, manual, and / or hydrostatic, depending on the work requirements. In a manual transmission, a clutch can, for example, engage and disengage the transmission from the engine, while an automatic forklift uses a torque converter. The engine may be powered by an internal combustion engine such as gasoline, diesel, or propane. The engine may also be powered by an electric motor having, for example, a rechargeable battery.

[0023] In some embodiments, for example, hydraulics may be used for the lifting device. For example, a hydraulic pump powered by an engine pumps hydraulic fluid to operate lift cylinders and tilt cylinders that are responsible for raising and lowering the forks and tilting the mast. The hydraulic system can store hydraulic fluid in a reservoir, for example, and the control valve adjusts the flow rate to the cylinders to ensure precise control of the forklift's movement.

[0024] In some embodiments, periodic maintenance, including fluid inspection and replacement, may be performed to maintain the optimal function of the hydraulic system.

[0025] In some embodiments, the load may extend, for example, along the longitudinal direction of the mast. The counterweight may be required only, for example, to support the moment load generated from its weight when the load is raised and lowered along the mast.

[0026] The rear mast forklift chassis can have designs of different embodiments that optimize the handling and maneuverability of loads in various industrial environments, for example. The rear mast forklift chassis can incorporate an advanced hydraulic system that ensures accurate control and adaptability, for example. The rear mast forklift chassis can feature modular components that allow for easy customization and scalability according to operating requirements, for example. The rear mast forklift chassis can be designed to accommodate both electric and internal combustion engines, thereby providing flexibility in power sources, for example. The rear mast forklift chassis can include reinforced structural elements that enhance durability and extend the operating life of the forklift, for example. The rear mast forklift chassis can be equipped with a smart technology interface that provides real-time data regarding load dynamic characteristics and forklift performance, for example.

[0027] The rear mast forklift chassis can utilize design advantages that improve efficiency and safety in material handling, for example. The rear mast forklift chassis can use a counterbalance weight system that minimizes the need for a larger counterweight, thus reducing the overall weight of the forklift, for example. The rear mast forklift chassis can provide a swivel device that enhances the operator's ability to handle loads more easily and accurately, for example. The rear mast forklift chassis can use a tilt cylinder that provides a stable tilting operation, thereby enabling better handling of unevenly distributed loads, for example. The rear mast forklift chassis can integrate hydraulic inter-reeling to facilitate the seamless use of various fork attachments, for example. The rear mast forklift chassis can position the mast to maximize leverage and balance, thereby improving the working efficiency of the forklift, for example.

[0028] The rear mast forklift chassis can incorporate, for example, safety advantages that protect both the operator and the integrity of the load being handled. The rear mast forklift chassis can, for example, improve the operator's visibility, thereby enhancing visibility and reducing the risk of accidents. The rear mast forklift chassis can, for example, maintain a stable load capacity, thereby ensuring that the forklift's load capacity rating remains constant regardless of the tilt angle. The rear mast forklift chassis can, for example, feature a streamlined design with no unnecessary protrusions, thereby reducing the likelihood of snagging or collisions in narrow spaces. The rear mast forklift chassis can, for example, be equipped with sensors that monitor environmental conditions and load stability, thereby providing automatic adjustments that improve safety. The rear mast forklift chassis can, for example, include safety features that exceed standard crash regulation load ratings, thereby providing enhanced protection under extreme conditions. The rear mast forklift chassis can, for example, contribute to a safer working environment through innovative design features that prioritize operator visibility and load stability.

[0029] Figure 2 shows an example 200 of a front axle assembly that supports the weight of a forklift during operation. The front axle assembly can be used, for example, to handle both vertical forces. The front axle assembly can be used, for example, to efficiently handle horizontal load forces.

[0030] The front axle assembly 200 includes a tilt cylinder 205. The tilt cylinder can control, for example, the angle adjustment of the fork, thereby ensuring stability during load handling. The tilt cylinder may use, for example, a linear actuator to operate the cylinder. The tilt cylinder may use, for example, hydraulic pressure to operate the cylinder. The tilt cylinder may use, for example, pneumatic pressure to operate the cylinder.

[0031] The front axle assembly 200 includes a tilt swivel 210. The tilt swivel can be attached, for example, to the base of the lifting device. The tilt swivel can be used, for example, to allow the fork to pivot at various angles. The tilt swivel can improve, for example, the maneuverability when placing and / or lifting a load. Reinforced attachment points can be used, for example, to secure components such as the tilt cylinder and swivel to the chassis frame.

[0032] The front axle assembly includes rollers 215. The rollers of the lift bracket can be coupled to the mast, for example, so that the rollers can be used to raise and lower the front axle assembly along the longitudinal direction of the mast.

[0033] In some embodiments, the base support structure connects the tilt cylinder to the front axle assembly.

[0034] The front axle assembly 200 includes a pair of front tires 220. The front tires 220 are coupled to the front axle 225. The front axle can be used, for example, to maintain the alignment of the front wheels and evenly distribute the weight to the front wheels of the forklift.

[0035] Figure 3 shows an embodiment 300 of a rear mast forklift chassis. The tilt cylinder 205 can be integrated into the chassis, for example, to provide accurate adjustment. The tilt cylinder 205 can, for example, stabilize the lift device of the forklift and manage angular changes during load handling. The longitudinal axis 310 extends vertically along the mast. The longitudinal axis 310 ensures proper alignment of all components bearing the load and supports the vertical movement of the lift device.

[0036] In some embodiments, the rear mast forklift chassis can be used, for example, such that the load moves in a straight vertical path along the mast. The rear chassis can be used, for example, to maintain a predetermined distance from a pivot point and / or pendulum axis (e.g., a pivot point located on the front axle). This configuration can, for example, prevent the lift capacity of the forklift from decreasing as the load is raised. For example, with zero moment at the front axle, a load of 454 kilograms (1,000 pounds) on the front forks is balanced by a 454 - kilogram (1,000 - pound) counterweight from the mast, canceling the moment and improving stable handling. This can be adjusted proportionally, for example, for different forklifts (e.g., 454 kg (1000 lbs), 2268 kg (5000 lbs), 4536 kg (10000 lbs), etc.).

[0037] As background, conventional forklifts may have a reduced rated capacity, for example, when the mast tilts forward or the load height increases. In some embodiments, the rear mast forklift chassis can maintain a constant load capacity, for example, regardless of the lift height and / or a predetermined tilt angle.

[0038] Figure 4 shows a block diagram of an embodiment 400 of a rear mast forklift chassis. Embodiment 400 of the rear mast forklift chassis includes a backrest 405. The backrest may be integrated with the forklift device 115, for example, to prevent the load from sliding backward during transportation. The backrest 405 can improve safety, for example, by improving the stability of the load being lifted and moved.

[0039] Embodiment 400 of the rear mast forklift chassis includes a double rod tilt cylinder device 410. The double rod cylinder device can, for example, balance the distribution of forces during the tilting operation. The double rod tilt cylinder device can include two rods, for example, to improve the durability and stability of the forklift. This double rod configuration can maintain consistent tilt control, for example, when handling uneven and / or heavy loads.

[0040] Embodiment 400 of the rear mast forklift chassis includes a mast base support bracket 415. The mast base support bracket can provide basic stability to the rear mast forklift chassis, for example. Since the bracket 415 is disposed under the fixed mast 125, it can, for example, fix the mast in place and prevent unnecessary movement during operation. In some embodiments, the mast base support bracket 415 may include, for example, lateral struts to reduce torsional forces. This can improve the structural integrity of the forklift and the load handling capacity, for example.

[0041] Figure 5 shows a block diagram of an embodiment 500 of a rear mast forklift chassis. The tilt lock device 505 is integrated with the forklift device 115. The lock device 505 fixes the forklift at a fixed tilt angle, thereby preventing unnecessary movement during load transportation. The load weight sensor 510 is installed within the forklift device 115. The sensor 510 performs weight measurement in real time, enabling the driver to efficiently manage the load. The rear mast forklift chassis 500 includes a mast alignment guide 515. The mast alignment guide 515 ensures accurate load placement by holding the fixed mast 125 along the longitudinal axis 305. The positioner device 520 is attached to the forklift device 115. The positioner device 520 adjusts the lateral spacing of the forks to accommodate various load sizes. The collision detection device 525 is attached to the chassis 500. The detection device 525 warns the driver of nearby obstacles, thereby improving safety during forklift operation.

[0042] Figure 6 shows a block diagram of an embodiment 600 of a rear mast forklift chassis. The fork extension device 605 is integrated with the forklift device 115. The extension device 605 extends the reach of the forks to handle longer loads.

[0043] The rear mast forklift chassis 600 includes a reflective warning device 610. The reflective device 610 enhances visibility in low-light environments, thereby improving work safety.

[0044] The chassis 600 includes a step device 615 attached near the driver area 140. The step device 615 provides safe access for the driver to enter and exit the forklift.

[0045] The rearview mirror 620 is attached to the head guard 150. The mirror 620 improves visibility of the driver's rear working space during operation.

[0046] The load visibility improvement device 625 is installed on the fixed mast 125. The improvement device 625 ensures that the view to the load is not obstructed during the lifting operation.

[0047] Although various embodiments have been described with reference to the figures, other embodiments are possible.

[0048] Although an exemplary system has been described with reference to FIGS. 1-6, other embodiments can be deployed in other industries, science and technology, medical, commercial, and / or residential applications.

[0049] In some embodiments, the rear mast forklift chassis can significantly reduce energy waste during forklift operation by optimizing the weight distribution. As background, conventional forklifts may require a significant counterweight, for example, to balance the front mast, resulting in an excessive weight even when the forklift is empty. By moving the mast to a rear position, the need for a large counterweight is minimized, thereby reducing the overall weight of the machine. By adjusting in this way, the energy consumption required to move the forklift is reduced, especially when the forklift is operating with an empty load.

[0050] In some embodiments, the forklift spends a significant portion (e.g., about 50%) of its operating time operating with an empty load as it returns to pick up a new load. As background, during these empty-load runs, conventional forklifts may carry, for example, an unnecessary counterweight, thereby increasing fuel and / or battery consumption. For example, a conventional 4,536-kilogram (10,000-pound) forklift may pull an additional 907-kilogram (2,000-pound) counterweight even when not carrying a load. In contrast, a rear mast forklift designed for a 2,268-kilogram (5,000-pound) capacity can reduce unnecessary weight by about 20%, thereby increasing efficiency and reducing wear on the engine and transmission.

[0051] In some embodiments, an electric forklift, particularly a stand-up unit, can advantageously reduce the weight of the forklift that directly affects battery life, thereby allowing the electric model to operate longer between charges. By having a lighter weight to move during travel at no load, the electric forklift can, for example, achieve higher energy efficiency. By reducing the burden on the battery, the battery life can be extended, for example.

[0052] In some embodiments, the design of the rear mast can, for example, affect the counterweight requirements. In some cases, by changing the position of the mast, the counterweight can be completely removed or substantially reduced. As background, conventional forklifts require a significant counterweight to offset the lower part of the front mast. The rear mast can, for example, naturally balance the load by moving the center of gravity to the rear of the machine. By balancing in this way, the need to add a counterweight is reduced, resulting in a lighter, more efficient forklift that is easier to operate and places less of a burden on the power system.

[0053] In some embodiments, by reducing the overall weight and optimizing energy efficiency, the rear mast forklift chassis can improve the use and efficiency of different forklifts, such as a 2268 kg (5000 lbs) forklift, for example. The rear mast forklift chassis can improve the use and efficiency of different forklifts, such as a 4,536 kg (10,000 lbs) forklift, for example. The rear mast forklift chassis can improve the use and efficiency of different forklifts, such as a 1361 kg (3000 lbs) forklift, for example.

[0054] As background, the tilt in a forklift involves extremely important technical aspects related to the mast, which is a vertical assembly that supports the forks. The mast can be equipped with a hydraulic tilt device that is essential for adjusting the angle of the forks, thereby enabling the operator to handle loads with uneven weight distribution or accurately place the load on a high surface. The hydraulic system that controls the tilt of the mast includes a pump, hydraulic fluid, and control valves. When the operator activates the tilt control, the hydraulic pump pressurizes the hydraulic fluid and directs it through the control valves to hydraulic cylinders attached to the mast. These cylinders extend and retract, thereby tilting the mast as needed to adjust the angle of the forks. This controlled tilt device enhances the adaptability of the forklift in material handling operations.

[0055] As background, some embodiments can include, for example, an electric engine and / or an internal combustion engine, and the forklift can move nimbly in limited space by balancing power output and maneuverability.

[0056] Some embodiments can include safety features, for example, including a stability device and a driver's cab, thereby ensuring the safe handling of loads and making the forklift an essential tool in optimizing efficiency and productivity in various industrial environments.

[0057] In some embodiments, a rear mast forklift chassis includes a mast chassis configuration in which the mast is positioned behind a first set of front wheels. The forklift chassis includes a tilt device. The tilt device can extend from the mast beyond the axle of the front wheels to the forks to control the tilt of the forks. The tilt device includes a hydraulic system for exerting forces for rotation and tilt angle adjustment.

[0058] In some embodiments, when the hydraulic system is extended at a particular point, the forks integrated with both the tilt device and the mast can be tilted to efficiently pick up and transport an object. The object to be transported may include, for example, articles such as bales of hay, wooden frames, barrels, large objects, warehouse goods, etc. The object can be transported, for example, in a warehouse, a construction site, a loading dock, a recycling center, a landfill, a stack of drums, a lift, etc. The driver's control interface can, for example, facilitate real-time adjustment of the fork tilt.

[0059] Some embodiments can, for example, advantageously ensure that the lift capacity of the forklift remains constant regardless of the load or tilt angle. By placing the mast within the frame, for example, the need to add a counterweight may be reduced, and as a result, the entire forklift becomes lighter. This weight reduction may, for example, contribute to improved fuel efficiency. The weight reduction may, for example, allow the length of the forklift to be made shorter, thereby improving maneuverability in limited spaces. The reduction in the periodic forces on the forklift due to the fixed-capacity mast can, for example, extend the life of the transmission, thereby resulting in a longer operating period and reduced maintenance requirements. The rear chassis frame may, for example, require fewer moving parts within the mast than a conventional forklift, thereby further increasing operating efficiency and minimizing the need for maintenance. Some embodiments can, for example, enhance fuel efficiency and durability. Some embodiments can, for example, ensure an extended operating time, thereby making them applicable to a wide range of applications including both electric engine and non-combustion engine-powered forklifts.

[0060] In some embodiments, the rear mast forklift chassis includes a mast positioned behind the main set of front wheels. Positioning it rearward reduces the need to add counterweights, resulting in a lighter overall structure, improved fuel efficiency, and a more compact chassis. A lighter and shorter frame enhances the forklift's maneuverability, which is particularly beneficial in limited spaces such as warehouses, construction sites, and loading docks.

[0061] The chassis includes a tilt device powered by a hydraulic system that extends from the mast beyond the front wheel axle to the forklift device, thereby controlling adjustment of the tilt angle up to a maximum of 6 degrees in both clockwise and counterclockwise directions. This tilting ability enables efficient and stable handling of various loads, including bales, wooden frames, barrels, and / or other common items. The forklift can be made adjustable in real time, for example, via the driver's control interface, thereby supporting accurate positioning for lifting and transporting objects.

[0062] In some embodiments, the rear mast configuration can, for example, reduce periodic forces on the transmission. This configuration can, for example, extend the lifespan of the main components, thereby reducing the need for frequent maintenance and potentially extending the operating life of the forklift. This configuration can, for example, have fewer moving parts within the mast. The hydraulic system includes a reservoir for storing fluid and a control valve for regulating flow rate. The hydraulic system enables, for example, accurate lifting and tilt control. The mast includes rollers that guide the vertical movement of the lifting device, thereby reducing friction, ensuring smooth operation, and contributing to efficient lifting of loads. The chassis can, for example, accommodate multiple engine types, including gasoline, diesel, propane, and electric motors with rechargeable batteries.

[0063] With reference to the above figures, an example of a system that can be made portable has been described, but other embodiments can be deployed in other processing applications such as a desktop environment and a network environment.

[0064] In an exemplary aspect, some embodiments include, for example, a fixed mast extending along a longitudinal axis disposed behind the axle of the front wheel of a forklift, and a forklift device operably coupled to the fixed mast by rollers and extending beyond the axle of the front wheel, wherein the rollers are configured to operate the forklift device along the longitudinal axis of the fixed mast, and a rear mast - forklift - chassis including a driver area disposed behind the fixed mast.

[0065] In some embodiments, the rear mast - forklift - chassis can include a forklift device pivotally coupled to, for example, a tilt swivel device and also coupled to a tilt cylinder, wherein the tilt cylinder is configured to adjust the angle of the forklift such that it can rotate around the tilt swivel device.

[0066] In some embodiments, the rear mast - forklift - chassis can further include a tilt lock device, for example, integrated with the tilt swivel device and configured to fix the forklift device at a fixed tilt angle during load transportation.

[0067] In some embodiments, the rear mast - forklift - chassis can be configured such that, for example, the tilt cylinder is coupled to the forklift device such that the swivel device can rotate and tilt by 12 degrees or less.

[0068] In some embodiments, the rear mast - forklift - chassis can further include a front axle assembly having, for example, a reinforced attachment point coupled to the tilt swivel device and configured to support the forklift device during operation.

[0069] In some embodiments, the rear mast forklift chassis can further include, for example, a backrest configured to be attached to the forklift device and prevent the load from sliding backward during the lifting operation.

[0070] In some embodiments, the rear mast forklift chassis can further include, for example, a head guard fixed above the driver area and configured to protect the driver from falling objects.

[0071] In some embodiments, the rear mast forklift chassis can further include, for example, a rearview mirror device attached to the head guard and configured to improve the visibility of the driver's rear working space during operation.

[0072] In some embodiments, the rear mast forklift chassis can further include, for example, a double rod tilt cylinder device configured to ensure the distribution of forces during the tilting operation.

[0073] In some embodiments, the rear mast forklift chassis can include, for example, a mast base support bracket attached to the chassis and configured to reinforce the connection of the fixed mast to the chassis.

[0074] In some embodiments, the rear mast forklift chassis can further include, for example, a load weight sensor integrated into the forklift device and configured to provide real-time weight measurement values to the driver to improve load management.

[0075] In some embodiments, the rear mast forklift chassis can further include, for example, a mast alignment guide integrated into the fixed mast and the forklift device and configured to guide the forklift device while operating along the longitudinal axis of the fixed mast.

[0076] In some embodiments, the rear mast forklift chassis of claim 1 is attached to a forklift apparatus and further includes a positioning device configured to adjust the lateral spacing of the forks of the forklift apparatus to accommodate different load dimensions.

[0077] The rear mast forklift chassis of claim 1 is attached to the operator area and further includes a collision detection device configured to warn the operator of obstacles in the immediate path of the forklift.

[0078] In some embodiments, the rear mast forklift chassis can include, for example, a fork extension device attached to the forklift apparatus and configured to extend the reach of the forks so that the forks are configured to handle longer loads.

[0079] In some embodiments, the rear mast forklift chassis can further include, for example, a reflective warning device attached to the mast and configured to enhance the visibility of the forklift in low-light environments.

[0080] In some embodiments, the rear mast forklift chassis can further include, for example, a step device attached to the operator area.

[0081] The rear mast forklift chassis can further include, for example, a modular counterweight device attached to the chassis and configured to be adjustable in weight.

[0082] The rear mast forklift chassis can further include, for example, a load visibility improvement device attached to the mast and configured not to obstruct the view of the load during the lifting operation.

[0083] The rear mast forklift chassis can further include, for example, a 2268 kg (5000 lb) forklift.

[0084] Some embodiments have been described. Nevertheless, it will be understood that various changes can be made. For example, when the steps of the disclosed technology are executed in a different order, or when the components of the disclosed system are combined in a different way, or when a component is supplemented by another component, advantageous results may be achieved. Accordingly, other embodiments are contemplated within the scope of the following claims.

Claims

1. A fixed mast extending along a longitudinal axis, disposed behind the axle of the front wheels of a forklift, A forklift device operably coupled to the fixed mast by rollers and extending beyond the axle of the front wheels, wherein the rollers are configured to operate the forklift device along the longitudinal axis of the fixed mast, A driver area disposed behind the fixed mast A rear mast forklift chassis comprising.

2. The rear mast forklift chassis according to claim 1, further comprising that the forklift device is pivotally coupled to a tilt swivel device and is also coupled to a tilt cylinder, and the tilt cylinder is configured to adjust the angle of the forklift that can rotate around the tilt swivel device.

3. The rear mast forklift chassis according to claim 2, further comprising a tilt lock device integrated with the tilt swivel device and configured to fix the forklift device at a fixed tilt angle during cargo transportation.

4. The rear mast forklift chassis according to claim 2, wherein the tilt cylinder is coupled to the forklift device such that the swivel device can tilt rotatably by 12 degrees or less.

5. The rear mast forklift chassis according to claim 2, further comprising a front axle assembly having a reinforced attachment point coupled to the tilt swivel device and configured to support the forklift device during operation.

6. The rear mast forklift chassis according to claim 1, further comprising a backrest attached to the forklift device and configured to prevent the cargo from sliding backward during the lifting operation.

7. The rear mast forklift chassis according to claim 1, further comprising a head guard fixed above the driver area and configured to protect the driver from falling objects.

8. The rear mast forklift chassis according to claim 7, further comprising a rearview mirror device attached to the head guard and configured to improve the visibility of the driver's rear working space during operation.

9. The rear mast forklift chassis according to claim 1, further comprising a double rod tilt cylinder device configured to ensure the distribution of forces during the tilting operation.

10. The rear mast forklift chassis according to claim 1, further comprising a mast base support bracket attached to the chassis and configured to reinforce the connection of the fixed mast to the chassis.

11. The rear mast forklift chassis according to claim 1, further comprising a load weight sensor integrated with the forklift device and configured to provide real-time weight measurement values to the driver to improve load management.

12. The rear mast forklift chassis according to claim 1, further comprising a mast alignment guide integrated with the fixed mast and the forklift device and configured to guide the forklift device while operating along the longitudinal axis of the fixed mast.

13. The rear mast forklift chassis according to claim 1, further comprising a positioner device attached to the forklift device and configured to adjust the lateral spacing of the forks of the forklift device to accommodate different load dimensions.

14. The rear mast forklift chassis according to claim 1, further comprising a collision detection device attached to the driver area and configured to warn the driver of obstacles in the immediate path of the forklift.

15. The rear mast forklift chassis according to claim 1, further comprising a fork extension device attached to the forklift device and configured to extend the reach length of the forks configured to handle longer loads.

16. The rear mast forklift chassis according to claim 1, further comprising a reflective warning device attached to the mast and configured to enhance the visibility of the forklift in low-light environments.

17. The rear mast forklift chassis according to claim 1, further comprising a step device attached to the driver area.

18. The rear mast forklift chassis according to claim 1, further comprising a modular counterweight device attached to the chassis and configured to be weight-adjustable.

19. The rear mast forklift chassis according to claim 1, further comprising a load visibility improvement device attached to the mast and configured not to obstruct the view of the load during the lifting operation.

20. The rear mast forklift chassis according to claim 1, further comprising the forklift including a forklift of 2268 kg (5000 lb).

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