A portable electric forklift

Abstract

The present application discloses a portable electric hand-held forklift. The forklift comprises a first frame and a second frame mounted on the first frame. The present invention discloses a specific structure of the portable electric hand-held forklift. The first frame is used as a load-bearing mechanism, and a second frame is provided that is movable relative to the first frame. Goods are placed on the front fork of the second frame. When a driving assembly is activated, the end of the lifting arm close to the first frame rotates around a first connecting rod, and the end of the lifting arm away from the first connecting rod lifts the second frame, thereby lifting the goods to be transported on the second frame. To ensure the stability of the second frame during the lifting process, a balancing rod is provided between the first frame and the second frame. The balancing rod is rotatably connected to the front fork upright beam and the second connecting rod, respectively. When the driving assembly is activated, the end of the lifting arm close to the first frame rotates around the first connecting rod, and the balancing rod rotates around the second connecting rod. Therefore, the balancing rod does not hinder the lifting process of the lifting arm.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of forklift equipment, and in particular to a portable electric walk-behind forklift. Background Art

[0002] Forklifts are industrial handling vehicles, which refer to various wheeled handling vehicles used for loading, unloading, stacking and short-distance transportation of palletized cargo. Industrial handling vehicles are widely used in ports, stations, airports, freight yards, factory workshops, warehouses, circulation centers and distribution centers, etc., to load, unload and transport palletized cargo in cabins, carriages and containers. They are indispensable equipment in pallet transportation and container transportation.

[0003] At present, for lifting heavy goods, as well as large ports, airports and factory workshops, in most cases, vehicle-mounted forklifts and small push forklifts are needed to be used together. Vehicle-mounted forklifts are mostly driven by humans to transport and lift goods during use, which is more efficient, but the cost of vehicle-mounted forklifts is higher, and they are not suitable for long-distance transportation, and vehicle-mounted forklifts are suitable for larger areas. For small factories to transport goods, the cost of using vehicle-mounted forklifts is higher, and when the site is small, it is not convenient to move, and it may even cause certain safety accidents. At this time, small push forklifts can better meet actual transportation needs.

[0004] At present, most of the small push forklifts on the market are manual hydraulic forklifts, most of which are used to transfer goods. The disadvantage of manual hydraulic forklifts is that they have limited lifting height for goods that need to be loaded and unloaded, and most of them still require manpower for loading and unloading. In addition, manual hydraulic forklifts are heavy and cannot be carried on the vehicle. Therefore, we propose a portable hand-held electric forklift to solve the problems of difficult handling, low efficiency and high labor cost of existing forklifts. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a portable electric hand-held forklift that can be carried on a vehicle, conveniently and quickly loads and unloads goods, saves manpower, has a simple structure and is easy to implement.

[0006] In a first aspect, the present application provides a portable electric walk-behind forklift, comprising: a first frame and a second frame disposed on the first frame;

[0007] The first frame includes: a frame and two parallel inclined beams; the frame is a U-shaped structure, and is provided with two parallel front fork legs; a first caster is provided at the end of each front fork leg; two parallel cross beams are provided on a side of the frame away from the front fork legs; a second caster is provided at the end of the cross beam; a first connecting rod and a second connecting rod are provided in parallel between the two inclined beams, and the second connecting rod is located at the ends of the two inclined beams;

[0008] The second frame includes: a lifting arm and a front fork upright beam; the lifting arm is arranged on the first connecting rod, and the lifting arm is connected to a driving assembly; the front fork upright beam is arranged at the end of the lifting arm; a front fork is arranged on the front fork upright beam; a balancing rod is provided between the front fork upright beam and the second connecting rod; the balancing rod is rotatably connected to the front fork upright beam and the second connecting rod respectively; a long hole is also provided on the lifting arm; two symmetrically arranged pull scales are provided on the edge of the long hole; a connecting shaft is provided between the two pull scales.

[0009] According to the technical solution provided in the embodiment of the present application, the driving assembly includes: a cylinder and a battery; the cylinder is arranged on the frame, and the cylinder is located between the two second support rods; the piston rod of the cylinder is fixedly connected to a telescopic rod, and the end of the telescopic rod passes through the long hole and is fixed to the connecting shaft; the battery can be arranged on the side wall of any of the inclined beams, the surface of the frame or the side wall of the frame close to the cross beam; a handrail is provided on the outer wall of each of the inclined beams, the handrail is close to the end of the inclined beam, and the two handrails are symmetrically arranged; a control switch is also provided at the end of any of the inclined beams, and the control switch is arranged adjacent to the handrail; the battery is connected to the cylinder and the control switch respectively through wires.

[0010] According to the technical solution provided in the embodiment of the present application, the angle formed by the oblique beam and the front fork leg is greater than or equal to 90 degrees.

[0011] According to the technical solution provided in the embodiment of the present application, the second caster is a universal wheel.

[0012] According to the technical solution provided in the embodiment of the present application, a support rod is provided between the oblique beam and the horizontal beam.

[0013] According to the technical solution provided in the embodiment of the present application, both ends of the support rod are detachably connected to the oblique beam and the horizontal beam respectively.

[0014] According to the technical solution provided in the embodiment of the present application, a limit switch is provided on the lifting arm, and the limit switch is provided close to the first connecting rod.

[0015] In summary, the present technical solution specifically discloses a specific structure of a portable hand-held electric forklift. The present application specifically utilizes a first frame as the carrying mechanism of the hand-held electric forklift, and adds a second frame on the first frame that can move relative to the first frame, and places the goods to be transported on the front fork of the second frame. When the driving component is started, the end of the lifting arm close to the first frame rotates around the first connecting rod and the end of the lifting arm relatively away from the first connecting rod lifts the second frame to lift the goods to be transported on the second frame. In the present technical solution, in order to ensure the balance and stability of the second frame during the lifting process, a balancing rod is provided between the first frame and the second frame, and the balancing rod is rotatably connected to the front fork upright beam and the second connecting rod respectively; when the driving component is started, the end of the lifting arm close to the first frame rotates around the first connecting rod, and at the same time, the balancing rod rotates around the second connecting rod, so the balancing rod will not hinder the lifting operation process of the lifting arm.

[0016] In this solution, a long hole is further opened on the lifting arm, and two symmetrical pull scales are set on the edge of the long hole. The end of the telescopic rod passes through the long hole and is fixedly connected to the connecting shaft between the two pull scales. The oil cylinder is activated to drive the lifting arm up and down, and the pull scales can share part of the gravity borne by the lifting arm, avoiding the problem of the lifting arm being subjected to excessive gravity and breaking.

[0017] In order to further enhance the supporting effect of the inclined beam in this solution, a support rod is set between the inclined beam and the cross beam. When the weight of the goods to be transported is heavy, the support rod can support the inclined beam and share the weight of the inclined beam, so as to avoid the inclined beam being broken by excessive force when the front fork is raised to transport the goods, causing damage to the forklift.

[0018] In order to further control the height of the boom, this solution provides a limit switch on the boom close to the first connecting rod, so that the boom can stop moving when it reaches a set position, thus protecting the boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 The figure is a structural diagram of a portable electric forklift.

[0021] Figure 2 The diagram is a structural diagram of a portable electric walk-behind forklift in a raised state.

[0022] Figure 3 The figure is a structural diagram of a portable electric forklift.

[0023] Numbers in the figure: 1. Frame; 2. Inclined beam; 3. Horizontal beam; 4. First connecting rod; 5. Second connecting rod; 6. Lifting arm; 7. Front fork upright beam; 8. Front fork; 9. Balance rod; 10. Cylinder; 11. Telescopic rod; 12. Pull scale; 13. Connecting shaft; 14. Long hole; 15. First caster; 16. Second caster; 17. Battery; 18. Control switch; 19. Support rod; 20. Limit switch; 21. Handrail. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Please refer to Figure 1 、 Figure 2 and Figure 3 , are all structural schematic diagrams of an embodiment of a portable hand-held electric forklift provided by the present application, including: a first frame and a second frame arranged on the first frame.

[0027] The first frame comprises: a frame 1 and two parallel inclined beams 2; the frame 1 is a U-shaped structure, and is provided with two parallel front fork legs; each end of the front fork legs is provided with a first caster 15; the side of the frame 1 away from the front fork legs is provided with two parallel cross beams 3; the end of the cross beam 3 is provided with a second caster 16 ( Figure 1 or Figure 3 A first connecting rod 4 and a second connecting rod 5 are provided in parallel between the two oblique beams 2, and the second connecting rod 5 is located at the ends of the two oblique beams 2 ( Figure 1 or Figure 3 shown).

[0028] The second frame includes: a lifting arm 6 and a front fork beam 7; the lifting arm 6 is arranged on the first connecting rod 4, and the lifting arm 6 is connected to a driving assembly; the front fork beam 7 is arranged at the end of the lifting arm 6; a front fork 8 is arranged on the front fork beam 7; a balancing rod 9 is provided between the front fork beam 7 and the second connecting rod 5; the balancing rod 9 is rotatably connected to the front fork beam 7 and the second connecting rod 5 respectively ( Figure 1 or Figure 3The lifting arm 6 is also provided with an elongated hole 14; the edge of the elongated hole 14 is provided with two symmetrically arranged pull scales 12; a connecting shaft 13 is provided between the two pull scales 12 ( Figure 1 or Figure 3 shown).

[0029] In this embodiment, the frame 1 is in a U-shaped structure, serving as a bearing base of the forklift and being used for mounting a second frame that can move relative to the first frame.

[0030] Two oblique beams 2 are arranged parallel to the surface of the frame 1 to support the cargo. In addition, the angle formed by the oblique beams 2 and the front fork legs of the frame 1 is greater than or equal to 90 degrees, which can disperse the force borne by the lifting arm 6 and prevent the lifting arm 6 from being crushed.

[0031] The first caster 15 is provided at the end of the front fork leg to facilitate the movement of the forklift; two crossbeams 3 are provided in parallel on the side of the frame 1 away from the front fork leg ( Figure 1 or Figure 3 As shown), it is used to install the second caster 16, which also plays a role of supporting and facilitating movement.

[0032] The second caster 16 is provided at the end of the beam 3 ( Figure 1 or Figure 3 As shown), the first caster 15 and the second caster 16 are used in conjunction with each other to facilitate the movement of the forklift. Here, the second caster 16 adopts a universal wheel to achieve the effect of convenient turning of the forklift when moving.

[0033] The first connecting rod 4 and the second connecting rod 5 are arranged between the two inclined beams 2, and the two are arranged in parallel. The second connecting rod 5 is located at the ends of the two inclined beams 2. The first connecting rod 4 is used to install the lifting arm 6, and the second connecting rod 5 is used to install the balance rod 9 ( Figure 1 or Figure 3 shown).

[0034] The lifting arm 6 is provided on the first connecting rod 4 and is used for lifting the goods to be transported. Here, the lifting arm 6 can realize the lifting process of the goods to be transported by using a straight arm or a curved arm.

[0035] A front fork upright beam 7 is provided at the end of the lifting arm 6 and is used for mounting a front fork 8 ; the front fork 8 is provided on the front fork upright beam 7 and is used for carrying goods to be transported.

[0036] The balancing rod 9 is provided between the front fork beam 7 and the second connecting rod 5, and is rotatably connected to the front fork beam 7 and the second connecting rod 5 respectively, so as to maintain the balance stability of the front fork beam 7 and also share the gravity for the boom 6. Figure 1 or Figure 3 When the drive assembly is activated, the end of the boom 6 closest to the first frame rotates about the first connecting rod 4. Simultaneously, the balancing rod 9 rotates about the second connecting rod 5, so the balancing rod 9 does not interfere with the lifting operation of the boom 6. Alternatively, the balancing rod 9 can be rotatably connected to the front fork upright beam 7 and the second connecting rod 5. Alternatively, a connecting bracket can be installed at the ends of the two diagonal beams 2, rotatably connecting the ends of the balancing rod 9 to the connecting bracket and the front fork upright beam 7. This connecting bracket can also serve as a handrail and accommodate control switches.

[0037] The elongated hole 14 is provided on the lifting arm 6 for the telescopic rod 11 to pass through. Here, the cross-sectional shape of the elongated hole 14 can also be a circular or square shape.

[0038] Two pulling scales 12 are symmetrically arranged on the edges of the long hole 14, and a connecting shaft 13 is provided between the two for fixing the telescopic rod 11, so that the oil cylinder 10 controls the lifting of the boom 6. At the same time, the pulling scale 12 also has the function of sharing the gravity of the boom 6 to avoid the boom 6 from bearing too much gravity and causing the problem of breakage. Here, the shape of the pulling scale 12 is not limited, and it can be optionally a triangle, square, rectangle or special shape.

[0039] In any preferred embodiment, the driving assembly includes: a cylinder 10 and a battery 17; the cylinder 10 is arranged on the frame 1, and the cylinder 10 is located between the two second support rods 3; the piston rod of the cylinder 10 is fixedly connected to the telescopic rod 11, and the end of the telescopic rod 11 passes through the long hole 14 and is fixed to the connecting shaft 13; the battery 17 can be arranged on the side wall of any of the inclined beams 2, the surface of the frame 1 or the side wall of the frame 1 close to the cross beam 3; a handrail 21 is provided on the outer wall of each of the inclined beams 2, the handrail 21 is close to the end of the inclined beam 2, and the two handrails 21 are symmetrically arranged; a control switch 18 is also provided at the end of any of the inclined beams 2, and the control switch 18 is arranged adjacent to the handrail 21; the battery 17 is connected to the cylinder 10 and the control switch 18 respectively through wires.

[0040] In this embodiment, the oil cylinder 10 is arranged on the frame 1. The oil cylinder 10 is located between the two second support rods 3, and its piston rod is fixedly connected to the telescopic rod 11, which provides driving force for the lifting of the boom 6. The type of the oil cylinder 10 is, for example, TKC MOB40*200-TC. When the oil cylinder 10 is started, the end of the boom 6 close to the first frame rotates around the first connecting rod 4 and the end of the boom 6 relatively away from the first connecting rod 4 lifts the second frame to lift the cargo to be transported on the second frame; the battery 17 is arranged on the side wall of any of the inclined beams 2, the surface of the frame 1 or the side wall of the frame 1 close to the cross beam 3, for providing electrical energy for the oil cylinder 10. The model of the battery is, for example, 48V 12ah battery; an armrest 21, which is arranged on the outer wall of each of the inclined beams 2, close to the end of the inclined beam 2, and the two armrests 21 are symmetrically arranged to facilitate the operator to push the forklift. Here, the armrest 21 can also be arranged at the end of the inclined beam 2, which can also achieve the purpose of facilitating the pushing and operation of the forklift; a control switch 18, which is arranged at the end of any of the inclined beams 2, and is adjacent to the armrest 21. The operator can operate the control switch 18 to open or close while holding the armrest. The battery 17 is connected to the cylinder 10 and the control switch 18 respectively through wires, and the opening and closing of the cylinder is controlled by the control switch 18 to control the working state of the forklift.

[0041] In any preferred embodiment, a support rod 19 is provided between the oblique beam 2 and the cross beam 3 .

[0042] In this embodiment, the support rod 19 is arranged between the oblique beam 2 and the cross beam 3 to enhance the supporting effect of the oblique beam 2 and prevent the oblique beam 2 from being broken by heavy goods and causing damage to the device.

[0043] In any preferred embodiment, both ends of the support rod 19 are detachably connected to the oblique beam 2 and the cross beam 3 .

[0044] In this embodiment, the connection method of the two ends of the support rod 19 with the inclined beam 2 and the cross beam 3 is not limited here. Optionally, they are connected by bolts. The specific connection method is: the two ends of the support rod 19 are respectively connected to the inclined beam 2 and the cross beam 3 by bolts, which is convenient for replacing the support rod 19. According to the weight of the carried goods, choose to install the appropriate support rod 19 to ensure the supporting effect.

[0045] In any preferred embodiment, a limit switch 20 is provided on the lifting arm 6 , and the limit switch 20 is provided close to the first connecting rod 4 .

[0046] In this embodiment, the limit switch 20 is provided on the boom 6 and is arranged close to the first connecting rod 4, and is used to limit the lifting height of the boom 6 so that the boom 6 can stop moving when it moves to a set position, thereby protecting the boom 6. Here, the model of the limit switch 20 is, for example, a STEIMEX LSA-012 limit switch.

[0047] The specific working process is as follows:

[0048] First, install the fully charged battery 17 on the inclined beam 2 and move the entire forklift to the designated position of the goods to be transported. Then the operator starts the control switch 18, so that the battery 17 supplies power to the oil cylinder 10, driving the output end of the oil cylinder 10 to lift the lifting arm 6, and the lifting arm 6 drives the front fork upright beam 7 to move upward. During the rising process, the front fork upright beam 7 is subjected to the force at both ends of the balance pull rod 9 to ensure that the front fork upright beam 7 remains balanced during the rising process. Since the front fork upright beam 7 and the front fork 8 are rigidly connected, the rising process of the front fork upright beam 7 is the rising process of the front fork 8, and then the goods are forked and transported. When unloading, the operator can push the forklift to the designated position by holding the handrail 21 and start the control switch 18 to lower the lifting arm 6, thereby realizing the lowering of the front fork force beam 7 and the front fork 8, and unloading the goods at the designated position, completing the entire loading and unloading process.

[0049] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A portable electric forklift, characterized in that: include: a first frame and a second frame disposed on the first frame; The first frame comprises: a frame (1) and two parallel inclined beams (2); the frame (1) is a U-shaped structure, and is provided with two parallel front fork legs; a first caster (15) is provided at the end of each front fork leg; two parallel cross beams (3) are provided on a side of the frame (1) away from the front fork legs; a second caster (16) is provided at the end of the cross beam (3); a first connecting rod (4) and a second connecting rod (5) are provided in parallel between the two inclined beams (2), and the second connecting rod (5) is located at the ends of the two inclined beams (2); The second frame comprises: a lifting arm (6) and a front fork upright beam (7); the lifting arm (6) is arranged on the first connecting rod (4), and the lifting arm (6) is connected to a driving assembly; the front fork upright beam (7) is arranged at the end of the lifting arm (6); a front fork (8) is arranged on the front fork upright beam (7); a balancing pull rod (9) is provided between the front fork upright beam (7) and the second connecting rod (5); the balancing pull rod (9) is rotatably connected to the front fork upright beam (7) and the second connecting rod (5) respectively; a long hole (14) is also provided on the lifting arm (6); two symmetrically arranged pull scales (12) are provided on the edge of the long hole (14); a connecting shaft (13) is provided between the two pull scales (12); Wherein, the angle formed by the oblique beam (2) and the front fork leg is greater than or equal to 90 degrees; the second caster (16) is a universal wheel; The driving assembly comprises an oil cylinder (10), a piston rod of the oil cylinder (10) is fixedly connected to a telescopic rod (11), and an end of the telescopic rod (11) passes through the elongated hole (14) and is fixedly connected to the connecting shaft (13).

2. A portable electric forklift according to claim 1, characterized in that: The drive assembly further includes a battery (17); the oil cylinder (10) is arranged on the vehicle frame (1), and the oil cylinder (10) is located between the two crossbeams (3).

3. A portable electric forklift according to claim 2, characterized in that: The battery (17) can be arranged on a side wall of any of the oblique beams (2), a surface of the vehicle frame (1), or a side wall of the vehicle frame (1) close to the cross beam (3).

4. A portable electric hand-held forklift according to claim 2 or 3, characterized in that: A handrail (21) is provided on the outer wall of each inclined beam (2), the handrail (21) is close to the end of the inclined beam (2), and the two handrails (21) are symmetrically arranged; a control switch (18) is also provided at the end of any inclined beam (2), and the control switch (18) is arranged adjacent to the handrail (21); the battery (17) is connected to the oil cylinder (10) and the control switch (18) respectively through wires.

5. A portable electric forklift according to any one of claims 1 to 3, characterized in that: A support rod (19) is provided between the oblique beam (2) and the cross beam (3).

6. The portable electric forklift according to claim 5, characterized in that: Both ends of the support rod (19) are detachably connected to the oblique beam (2) and the cross beam (3).

7. A portable electric walk-behind forklift according to any one of claims 1 to 3, characterized in that: A limit switch (20) is provided on the lifting arm (6), and the limit switch (20) is provided close to the first connecting rod (4).

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