Lightweight three-way forklift

Abstract

The light-weight three-way forklift comprises a forklift body, a portal frame system, an inner sliding frame, a cantilever frame and a pallet fork assembly which are sequentially connected, the front portion of the forklift body is fixedly connected with the portal frame system, the portal frame system comprises an outer portal frame and an inner portal frame which are in nested sliding fit, and the inner portal frame achieves vertical displacement through a lifting driving mechanism; the inner sliding frame is arranged on the portal frame system in a sliding mode and achieves lifting motion through a chain transmission mechanism. A horizontal sliding mechanism is arranged on the inner sliding frame, and the cantilever frame and the pallet fork assembly on the cantilever frame transversely move in the horizontal direction through the horizontal sliding mechanism. The forklift has the three-direction moving capacity, vertical lifting, horizontal transverse moving and horizontal rotation of the pallet fork can be achieved, and the forklift is suitable for operation in a narrow space and particularly suitable for application scenes such as floor operation with high space requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fork truck, especially to a lightweight three-way fork truck. BACKGROUND

[0002] With the rapid development of intensive warehousing logistics industry, the narrow aisle racking system has been widely used, and the use of narrow aisle three-way stacking fork truck is also more and more popular. However, in order to ensure the stability of operation, the traditional fork truck usually needs a larger self weight, which makes it put forward higher requirements for the bearing capacity of the warehouse floor. At the same time, due to the limitation of driving mode and vehicle body size, the operation field of view of three-way fork truck is relatively poor, and the operation flexibility is also greatly affected. In addition, the structure design of three-way fork truck is relatively complex, which leads to high manufacturing cost and heavy weight, and further makes its price much higher than that of ordinary fork truck. Therefore, the existing three-way fork truck is difficult to effectively meet the demand of goods handling and stacking in special environments such as narrow channel, low space, corridor and small goods elevator. SUMMARY

[0003] In order to solve all or part of the problems of the prior art, the utility model provides a lightweight three-way fork truck, which has three-way moving ability, can realize vertical lifting, horizontal transverse movement and horizontal rotation of the fork, is suitable for narrow space operation, and is especially suitable for floor operation and other application scenarios with high space requirements.

[0004] To achieve the above purpose, the utility model provides the following technical scheme:

[0005] A lightweight three-way fork truck, comprising a vehicle body, a portal system, an inner carriage, a cantilever frame and a fork assembly connected in sequence, the front part of the vehicle body is fixedly connected with the portal system, the portal system comprises an outer portal and an inner portal in nested sliding cooperation, the inner portal realizes vertical displacement through a lifting driving mechanism; the inner carriage is slidably arranged on the portal system and realizes lifting movement through a chain transmission mechanism; a horizontal sliding mechanism is arranged on the inner carriage, and the cantilever frame and the fork assembly thereon move horizontally and transversely through the horizontal sliding mechanism.

[0006] The lifting driving mechanism is a hydraulic oil cylinder symmetrically arranged on both sides of the outer portal, the cylinder body is fixed at the lower cross beam of the outer portal, the piston rod top end is connected to the upper cross beam of the inner portal, and the oil cylinder stroke is 1:1 compared with the lifting height of the inner portal.

[0007] The back of the inner door frame is arranged with a first guide rail along the axial center line, and two side edges are symmetrically provided with a second guide rail, the upper cross beam of the outer door frame is correspondingly provided with a side roller group matched with the first guide rail at the middle position and a main roller group matched with the second guide rail at the two side positions, the side roller group slides along the first guide rail, and the main roller group slides along the second guide rail.

[0008] The front of the inner door frame is arranged with a third guide rail along the axial center line, and the inner sliding frame is provided with the guide roller group matched with the third guide rail, and the guide roller group slides in the third guide rail.

[0009] The chain transmission mechanism comprises a first chain hanging plate arranged on the outer door frame, a movable pulley sprocket arranged on the inner door frame, a second chain hanging plate arranged on the inner sliding frame, and a chain, one end of the chain is connected to the first chain hanging plate, the other end of the chain passes through the movable pulley sprocket and is connected to the second chain hanging plate, and a closed loop transmission path with a transmission ratio of 1:2 is formed.

[0010] The horizontal sliding mechanism is two groups of slide rail assemblies arranged on the upper and lower parts of the inner sliding frame, the slide rail assembly comprises a slide rail and a rack part, and the rack part is arranged on the outer side of the slide rail; the cantilever frame is provided with a pulley group and a gear part matched therewith, the pulley group slides in the slide rail, and the gear part and the rack part are in meshing transmission.

[0011] The cantilever frame is internally provided with a fork rotating mechanism, the fork rotating mechanism is connected with the fork assembly through a multi-stage reduction gear set and a rotating shaft, and the rotating range of the fork assembly relative to the cantilever frame is 0°-180° under the drive of the horizontal rotating mechanism.

[0012] Both sides of the vehicle body are provided with load-bearing front wheels, and the rear part of the vehicle body is provided with load-bearing rear wheels, and the load-bearing rear wheels are connected with the power system and the steering system in the vehicle body.

[0013] The lower part of the vehicle body is provided with an installed counterweight at the facade, the installed counterweight is composed of a plurality of detachable cast iron modules, and the installed counterweight is connected with the vehicle body through a detachable structure.

[0014] The overall height of the door frame system in the closed state is between 2-2.5 meters; the transverse width of the forklift is controlled to be between 1-1.5 meters, and the longitudinal length is less than 2.5 meters. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 A structure schematic diagram of a light-weight three-way forklift according to an embodiment of the present application.

[0017] Figure 2 A structure schematic diagram of a mast system according to an embodiment of the present application. Figure 1

[0018] Figure 3 A partial structure enlarged view of a mast system according to an embodiment of the present application. Figure 2

[0019] A structure schematic diagram of a vehicle body according to an embodiment of the present application. Figure 4 Figure 1

[0020] Reference signs: 1, vehicle body; 101, front load wheel; 102, rear load wheel; 103, power system; 104, steering system; 2, mast system; 201, outer mast; 2011, side roller set; 2012, main roller set; 202, inner mast; 2021, first guide rail; 2022, second guide rail; 2023, third guide rail; 203, lifting driving mechanism; 204, chain transmission mechanism; 3, inner carriage; 301, horizontal sliding mechanism; 4, cantilever frame; 5, fork assembly. DETAILED DESCRIPTION

[0021] The technical solutions in the specific embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] The implementation of the present application will be described in detail below in combination with specific embodiments.

[0023] In the embodiments of the present application, reference is made to Figures 1 to 4 ​​​As shown, a lightweight three-way forklift is provided, which has a compact structure design and high efficiency. The forklift mainly includes a vehicle body 1, a portal system 2, an inner carriage 3, a cantilever frame 4 and a fork assembly 5, and each component is connected in sequence to form a coordinated whole. The front part of the vehicle body 1 is tightly combined with the portal system 2 through fixed connection, which ensures the stability of the entire forklift during operation. The portal system 2 adopts a nested sliding fit structure composed of an outer portal 201 and an inner portal 202. The inner portal 202 can realize vertical displacement under the action of a lifting drive mechanism 203, thereby meeting the carrying needs of goods of different heights. The inner carriage 3 is slidably arranged on the portal system 2 and realizes precise lifting movement by means of a chain transmission mechanism 204, further improving the operation flexibility of the forklift. In addition, the inner carriage 3 is specially provided with a horizontal sliding mechanism 301, and the cantilever frame 4 and the fork assembly 5 thereon can move horizontally along the horizontal direction through the horizontal sliding mechanism 301, so that the forklift can also flexibly adjust the position of the goods in a narrow space, greatly enhancing the applicability and operation convenience of the forklift.

[0024] Specifically, the lifting drive mechanism 203 is a hydraulic oil cylinder symmetrically arranged on both sides of the outer portal 201. The cylinder body of the hydraulic oil cylinder is fixed to the lower crossbeam of the outer portal 201, and the top end of the piston rod is connected to the upper crossbeam of the inner portal 202. The oil cylinder stroke is in a 1:1 ratio with the lifting height of the inner portal 202, thereby realizing the precise vertical lifting movement of the inner portal 202. The back surface of the inner portal 202 is arranged with a first guide rail 2021 along the axial center line, and two second guide rails 2022 are symmetrically arranged on the sides. The upper crossbeam of the outer portal 201 is correspondingly provided with a side roller set 2011 matched with the first guide rail 2021 in the middle position, and a main roller set 2012 matched with the second guide rail 2022 on both sides. During the lifting of the inner portal 202, the side roller set 2011 slides along the first guide rail 2021, and the main roller set 2012 slides along the second guide rail 2022, which ensures the stable lifting of the inner portal 202 in the outer portal 201 and effectively reduces friction and shaking. In addition, the outer portal 201 is provided with an electric limit device, and the height of the electric limit can be set according to actual use requirements to accurately control the highest lifting position of the portal, thereby ensuring the safety and reliability of the forklift during operation.

[0025] The third guide rail 2023 is arranged on the front surface of the inner door frame 202 along the axial center line, and the inner slide 3 is provided with a guide roller set matched with the third guide rail 2023. The guide roller set slides along the third guide rail 2023, thereby realizing the stable lifting movement of the inner slide 3 on the inner door frame 202. The chain transmission mechanism 204 includes a first chain hanging plate arranged on the outer door frame 201, a movable pulley sprocket installed on the inner door frame 202, a second chain hanging plate arranged on the inner slide 3, and a chain. One end of the chain is connected to the first chain hanging plate, and the other end is connected to the second chain hanging plate after passing through the movable pulley sprocket, forming a closed loop transmission path with a transmission ratio of 1:2. Through the chain transmission mechanism 204, the lifting movement of the inner slide 3 is realized, and is driven by the hydraulic oil cylinder to cooperate with the lifting action of the inner door frame 202. When the lifting drive mechanism 203 is started, the inner door frame 202 is moved upward by the extension and retraction action of the hydraulic oil cylinder. At the same time, the chain transmission mechanism 204 is synchronously driven, thereby driving the inner slide 3 and the cantilever frame 4 and the fork assembly 5 thereon to move upward. In this process, the stroke of the drive mechanism can be adjusted according to actual use requirements to adapt to the cargo handling requirements of different heights.

[0026] The horizontal sliding mechanism 301 includes two groups of slide rail assemblies arranged on the upper and lower parts of the inner slide 3, each group of slide rail assemblies including a slide rail and a rack part arranged on the outer side of the slide rail. The cantilever frame 4 is provided with a pulley set and a gear part matched therewith, the pulley set slides in the slide rail, and the gear part is in meshing transmission with the rack part. Through the cooperation of the pulley set and the slide rail and the meshing transmission of the gear part and the rack part, the cantilever frame 4 can realize stable horizontal movement on the inner slide 3, thereby meeting the cargo handling requirements at different positions. The cantilever frame 4 is further provided with a fork rotating mechanism connected with the fork assembly 5 through a multi-stage reduction gear set and a rotating shaft. Under the drive of the fork rotating mechanism, the fork assembly 5 can rotate in the horizontal direction relative to the cantilever frame 4, and the rotation range is 0° to 180°. This design enables the fork assembly 5 to flexibly adjust the angle according to actual operation requirements, further improving the applicability and operation convenience of the forklift in complex working conditions.

[0027] The vehicle body 1 is provided with a load-bearing front wheel 101 on both sides, and a load-bearing rear wheel 102 is arranged at the rear of the vehicle body 1, which is connected with the power system 103 and the steering system 104 in the vehicle body 1, for realizing the driving and steering functions of the forklift. The lower part of the vehicle body 1 is provided with a mounting type counterweight at the facade, which is composed of a plurality of detachable cast iron modules connected with the vehicle body 1 through a detachable structure, facilitating flexible adjustment according to actual operation requirements and forklift load conditions, so as to optimize the gravity distribution and stability of the whole vehicle.

[0028] The three-way forklift provided by the utility model is suitable for narrow space operation. The forklift has three-way moving ability, can realize vertical lifting, horizontal transverse moving and horizontal rotation of the cargo fork, and is particularly suitable for floor operation and other application scenarios with high space requirement. In design, the forklift pays attention to control of the whole vehicle weight, ensures that the whole vehicle weight does not exceed 3 tons, so as to meet the lightweight requirement; meanwhile, the carrying capacity can meet the actual operation requirement. In addition, the volume of the forklift is optimized and designed, the transverse width is controlled between 1m and 1.5m, the longitudinal length is less than 2.5m, and the door frame closed height is between 2m and 2.5m, so that the space occupation is reduced to the maximum, and the operation flexibility and applicability of the forklift in the narrow space are improved.

[0029] It should be noted that, for those skilled in the art, without departing from the principles of the utility model, the utility model can be improved and modified in many ways, and these improvements and modifications also fall within the scope of protection of the utility model claims.

Claims

1. A lightweight three-way forklift, characterized in that, The vehicle includes a vehicle body (1), a mast system (2), an inner carriage (3), a cantilever (4), and a fork assembly (5) connected in sequence. The front of the vehicle body (1) is fixedly connected to the mast system (2). The mast system (2) includes a nested sliding outer mast (201) and an inner mast (202). The inner mast (202) achieves vertical displacement through a lifting drive mechanism (203). The inner carriage (3) is slidably mounted on the mast system (2) and achieves lifting movement through a chain drive mechanism (204). The inner carriage (3) is provided with a horizontal sliding mechanism (301). The cantilever (4) and the fork assembly (5) on it move horizontally through the horizontal sliding mechanism (301).

2. The forklift according to claim 1, characterized in that, The lifting drive mechanism (203) is a hydraulic cylinder symmetrically arranged on both sides of the outer gantry (201). Its cylinder body is fixed to the lower crossbeam of the outer gantry (201), and the top of the piston rod is connected to the upper crossbeam of the inner gantry (202). The ratio of the cylinder stroke to the lifting height of the inner gantry (202) is 1:

1.

3. The forklift according to claim 1, characterized in that, The inner gantry (202) has a first guide rail (2021) arranged along the axial center line on its back side and second guide rails (2022) symmetrically arranged on both sides. The outer gantry (201) has a side roller assembly (2011) corresponding to the first guide rail (2021) at the middle position of the upper crossbeam and main roller assemblies (2012) corresponding to the second guide rails (2022) at both sides. The side roller assembly (2011) slides along the first guide rail (2021) and the main roller assembly (2012) slides along the second guide rail (2022).

4. The forklift according to claim 1, characterized in that, The inner gantry (202) has a third guide rail (2023) arranged along the axial center line on its front side. The inner slide (3) is provided with a guide roller assembly that cooperates with the third guide rail (2023). The guide roller assembly slides along the inner side of the third guide rail (2023).

5. The forklift according to claim 1, characterized in that, The chain drive mechanism (204) includes a first chain plate mounted on the outer gantry (201), a movable pulley sprocket mounted on the inner gantry (202), a second chain plate mounted on the inner slide (3), and a chain. One end of the chain is connected to the first chain plate, and the other end passes around the movable pulley sprocket and connects to the second chain plate, forming a closed-loop transmission path with a 1:2 transmission ratio.

6. The forklift according to claim 1, characterized in that, The horizontal sliding mechanism (301) consists of two sets of slide rail assemblies located on the upper and lower parts of the inner slide (3). The slide rail assembly includes a slide rail and a rack, with the rack located on the outer side of the slide rail. The cantilever frame (4) is provided with a matching pulley group and a gear group. The pulley group slides within the slide rail, and the gear group and the rack group mesh for transmission.

7. The forklift according to claim 1, characterized in that, The cantilever (4) is equipped with a fork rotation mechanism. The fork rotation mechanism is connected to the fork assembly (5) through a multi-stage reduction gear set and a rotating shaft. Under the drive of the horizontal rotation mechanism, the fork assembly (5) rotates within a range of 0°-180° relative to the cantilever (4).

8. The forklift according to claim 1, characterized in that, The vehicle body (1) is provided with front load-bearing wheels (101) on both sides and rear load-bearing wheels (102) at the rear of the vehicle body (1). The rear load-bearing wheels (102) are connected to the power system (103) and steering system (104) inside the vehicle body (1).

9. The forklift according to claim 1, characterized in that, The lower part and the vertical surface of the vehicle body (1) are equipped with an installed counterweight, which is composed of multiple detachable cast iron modules and is connected to the vehicle body (1) through a detachable structure.

10. The forklift according to claim 1, characterized in that, The overall height of the gantry system (2) in its closed state is between 2 and 2.5 meters; the lateral width of the forklift is controlled between 1 and 1.5 meters, and the longitudinal length is less than 2.5 meters.

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