Small wheel contraction type pallet fork structure for mechanical forklift

Abstract

The utility model relates to the technical field of forklifts, and discloses a small wheel contraction type pallet fork structure for a mechanical forklift, which comprises a forklift body, and a pallet fork is arranged on the forklift body; a lifting assembly is arranged at the front end of the pallet fork through a rotating piece, a bearing wheel capable of rotating around a connecting point is arranged on the lifting assembly, the lifting assembly is connected with one end of a first connecting rod through a first hinge rod, and the other end of the first connecting rod is connected with a driving assembly. The driving assembly drives the first connecting rod to move and drives the lifting assembly to turn over with the rotating piece as the circle center under the effect of the lever, so that the bearing wheel is driven to ascend and descend. By means of the design, the bearing wheels can be controlled to ascend and descend when the forklift enters a fork, and the interference problem when a traditional forklift carries goods on a tray shaped like a Chinese character'chuan 'is solved. In this way, the forklift can be suitable for a tray shaped like a Chinese character'tian 'and other double-face trays, the use scene of the forklift is greatly expanded, and the applicability and flexibility of the forklift are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a small wheel retractable cargo fork structure for a mechanical forklift. Background Art

[0002] Forklifts are industrial handling vehicles, which refer to various wheeled handling vehicles for loading and unloading, stacking and short-distance transportation of palletized goods. They are often used for the transportation of large objects in storage, usually driven by fuel engines or batteries. There are many types of forklifts, including internal combustion forklifts, electric forklifts, warehouse forklifts, off-road forklifts, explosion-proof forklifts, unmanned forklifts, etc. Internal combustion forklifts are divided into ordinary internal combustion forklifts, heavy-duty forklifts, container forklifts and side forklifts. Electric forklifts are powered by batteries and are divided into counterbalanced, forward-moving, stacking, etc. When a mechanical forklift is working, the main function of the fork tip load-bearing wheel at the front of the fork is to share part of the weight generated by the fork when carrying the goods, so that the center of gravity of the goods is between the fork tip load-bearing wheel and the steering wheel, reducing the force on the fork itself, thereby extending the service life of the fork.

[0003] In the prior art, when a forklift is transporting goods, the load-bearing wheels at the front end of the fork need to maintain contact with the ground, which makes it unsuitable for the zigzag pallet. The fork tip load-bearing wheels of the prior art can only be extended to a specified height, and the environmental adaptability is poor. The forklift cannot travel when the fork tip load-bearing wheels are off the ground. To solve this problem, a fork structure is designed that can achieve the retraction of the fork tip load-bearing wheels. When the mechanical transport forklift enters the fork, the fork tip load-bearing wheels can be lifted, and the balance is maintained by a group of load-bearing wheels at the root of the fork, which solves the interference problem with the zigzag pallet. Since the space at the bottom of the fork is small and the fork has to be engaged in load work for a long time, the structure must have high stability in a small space. Utility Model Content

[0004] (I) Technical problems solved: In view of the deficiencies in the prior art, the utility model provides a small-wheel retractable fork structure for a mechanical forklift, which has the function of automatic retraction of the front-end load-bearing wheels and can maintain normal operation after the front-end load-bearing wheels are retracted, thus solving the problem that the forklift cannot be used in application scenarios such as the field pallet due to the front-end load-bearing setting.

[0005] (II) Technical solution: In order to achieve the above-mentioned function of automatically retracting the front-end load-bearing wheel and to maintain normal operation after the front-end load-bearing wheel is retracted, the utility model provides the following technical solution: a small-wheel retractable fork structure for a mechanical forklift, comprising a forklift body, on which a fork is arranged;

[0006] The front end of the fork is provided with a lifting assembly through a rotating member, the lifting assembly is provided with a load-bearing wheel that can rotate around a connection point, the lifting assembly is connected to one end of a first connecting rod through a hinge rod 1, and the other end of the first connecting rod is connected to a driving assembly;

[0007] The first connecting rod is driven to move by the driving assembly, and the lifting assembly is driven to flip with the rotating member as the center under the action of the lever, thereby driving the load-bearing wheel to rise and fall.

[0008] Preferably, the lifting assembly includes a flipping member, which is fixed to the fork through a rotating member, and the flipping member is a symmetrical clamping structure composed of two clamping plates, on which mounting plates are provided, and the load-bearing wheels are installed through the mounting plates, and the load-bearing wheels are provided between the two clamping plates through a second hinged rod. After the flipping member is flipped with the rotating member as the center under the push of the first connecting rod, the load-bearing wheels will adjust their angles with the second hinged rod as the center to keep them parallel to the ground.

[0009] Preferably, the first connecting rod is configured as a driving shaft.

[0010] Preferably, the driving assembly includes a second connecting rod connected to the driving shaft, the second connecting rod is fixed to the fork via a rotating rod, and the second connecting rod is connected to the driver.

[0011] Preferably, the first connecting rod is configured as a screw rod, one end of which is connected to the lifting assembly via a rotating sleeve, and the other end of which is connected to the driving assembly.

[0012] Preferably, the driving assembly includes a lifting block sleeved on the screw rod, the lifting block is connected to the fork via a lifting shaft, and a second driver is provided at the end of the screw rod, and the second driver is fixed by the lifting block.

[0013] (III) Beneficial effects: Compared with the prior art, the utility model provides a small wheel retractable fork structure for a mechanical forklift, which has the following beneficial effects:

[0014] 1. Enhanced applicability and flexibility: The utility model is designed to control the rise and fall of the load-bearing wheels when the forklift is engaged, eliminating the interference problem of traditional forklifts when carrying goods other than Sichuan-shaped pallets. This makes the forklift applicable to other double-sided pallets such as Tian-shaped pallets, thereby greatly expanding the use scenarios of the forklift and improving the applicability and flexibility of the forklift.

[0015] 2. Improve work efficiency: Since the forklift of the utility model can be applied to more types of pallets, in practical applications, it is not necessary to change different types of forklifts to cope with diverse handling needs. This reduces the time and cost of changing forklifts and improves work efficiency.

[0016] 3. Enhanced safety: By improving the design of the fork tip load-bearing wheels, the utility model may also enhance the stability of the forklift during the handling process, reduce safety hazards and cargo losses caused by interference or improper operation, and improve the safety of forklift operation.

[0017] 4. Compact structure and strong stability: The existing technology has a complex structure that is not streamlined enough and occupies a large space. The utility model uses a connecting rod mechanism and combines the principle of lever to realize the contraction and expansion movement of the load-bearing wheel. Due to the characteristics of the connecting rod mechanism itself, the mechanism has strong structural stability and limits the expansion position of the fork tip load-bearing wheel by mechanical self-locking, which is safer and more stable. Due to the streamlined structure, it occupies less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a small-wheel retractable cargo fork structure for a mechanical forklift in the utility model;

[0019] Figure 2 It is a front view of the small wheel retractable fork structure for the mechanical forklift in the utility model;

[0020] Figure 3 It is a schematic diagram of the bottom three-dimensional structure of the small wheel retractable fork structure for the mechanical forklift in the utility model;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the first embodiment of the small wheel retractable fork structure for a mechanical forklift in the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of a second embodiment of the small-wheel retractable fork structure for a mechanical forklift in the utility model.

[0023] In the figure: 1-forklift body, 2-fork, 3-rotating part, 4-lifting assembly, 5-load-bearing wheel, 6-articulated rod 1, 7-first connecting rod, 8-driving assembly, 9-articulated rod 2, 7a-driving shaft, 7b-screw, 401-flipping part, 402-mounting plate, 801a-second connecting rod, 802a-rotating rod, 803a-driver 1, 801b-lifting block, 802b-lifting shaft, 803b-rotating sleeve, 804b-driver 2. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , a small wheel retractable fork structure for a mechanical forklift, comprising a forklift body 1, wherein the forklift body 1 comprises all the parts of a forklift in the prior art except for a fork 2, which will not be described in detail herein, and the forklift body 1 is provided with a fork 2;

[0026] The front end of the fork 2 is provided with a lifting assembly 4 through a rotating member 3, and a load-bearing wheel 5 that can rotate around a connection point is provided on the lifting assembly 4. The lifting assembly 4 is connected to one end of a first connecting rod 7 through an articulated rod 1 6, and the other end of the first connecting rod 7 is connected to a driving assembly 8; the lifting assembly 4 includes a flipping member 401, and the flipping member 401 is fixed to the fork 2 through a rotating member 3. The flipping member 401 is a symmetrical clamping structure composed of two cardboards, and a mounting plate 402 is provided on the two cardboards. The load-bearing wheel 5 is installed through the mounting plate 402, and the load-bearing wheel 5 is arranged between the two cardboards through an articulated rod 2 9. After the flipping member 401 is flipped with the rotating member 3 as the center of the circle under the push of the first connecting rod 7, the load-bearing wheel 5 will adjust the angle with the articulated rod 2 9 as the center of the circle to keep it parallel to the ground. Through the setting of the lifting assembly 4, it can be ensured that the load-bearing wheel 5 can still be flush with the ground it contacts with when it is still in contact with the ground after rising and falling, and there will be no partial contact with the ground.

[0027] The driving assembly 8 drives the first connecting rod 7 to move, and under the action of the lever, drives the lifting assembly 4 to flip around the rotating member 3 as the center, thereby driving the load-bearing wheel 5 to rise and fall. The power provided by the driving assembly 8 drives the first connecting rod 7 to achieve a push-pull action, and at the same time, it can ensure that the first connecting rod 7 will not interfere with each other during the push-pull process.

[0028] The first connecting rod 7 is configured as a driving shaft 7a. By using the driving shaft 7a for pushing and pulling, the movement of the lifting assembly 4 can be controlled relatively directly through the lever principle.

[0029] The driving assembly 8 includes a second connecting rod 801a connected to the driving shaft 7a. The second connecting rod 801a serves as a lever rotation fulcrum and can quickly transmit the power of the driver to the first connecting rod 7. At the same time, the second connecting rod 801a pushes or pulls the first connecting rod 7 during the rotation process to change the upper and lower heights of the first connecting rod 7, thereby ensuring that the height of the first connecting rod 7 is the same as the height of the connection point of the lifting assembly 4 to avoid interference. The second connecting rod 801a is fixed to the fork 2 through a rotating rod 802a as the center of rotation. The second connecting rod 801a is connected to the driver 1 803a. The driver 1 803a can use a power source such as an electric cylinder or a pneumatic cylinder. The driving force of the driver 1 803a can be quickly transmitted to the lifting assembly 4. At the same time, power sources such as electric cylinders or pneumatic cylinders are easy to replace, which is convenient for the subsequent maintenance and repair of the forklift.

[0030] Example 2: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 ,

[0031] A small-wheel retractable fork structure for a mechanical forklift comprises a forklift body 1, on which a fork 2 is arranged; a lifting assembly 4 is arranged at the front end of the fork 2 through a rotating member 3, and a load-bearing wheel 5 that can rotate around a connection point is arranged on the lifting assembly 4, and the lifting assembly 4 is connected to one end of a first connecting rod 7 through a hinge rod 6, and the other end of the first connecting rod 7 is connected to a driving assembly 8; the first connecting rod 7 is driven to move by the driving assembly 8, and the lifting assembly 4 is driven to flip around the rotating member 3 as the center under the action of the lever, thereby driving the load-bearing wheel 5 to rise and fall.

[0032] The first connecting rod 7 is configured as a screw rod 7b, one end of which is connected to the lifting assembly 4 via a rotating sleeve 803b, and the other end is connected to the driving assembly 8. The screw rod 7b is used for pushing and pulling, so that the flipping angle of the lifting assembly 4 can be controlled more accurately.

[0033] The driving assembly 8 includes a lifting block 801b sleeved on the screw rod 7b, and the lifting block 801b can rise and fall together with the screw rod 7b. The lifting block 801b is connected to the fork 2 through a lifting shaft 802b. A second driver 804b is provided at the end of the screw rod 7b. The second driver 804b can use a driving component such as a motor as a power source. The second driver 804b drives the screw rod 7b to rotate. After the screw rod 7b rotates, a push-pull movement is realized, which drives the lifting assembly 4 to flip. The second driver 804b is fixed by the lifting block 801b. The second driver 804b is fixed to the fixed plate through a slide rail, and the fixed plate is connected to the lifting block 801b to ensure that the second driver 804b can move together with the screw rod 7b.

[0034] Working principle: The rise and fall of the load-bearing wheel 5 is mainly controlled by the lever principle. The first connecting rod 7 is driven to move by the driving assembly 8 to push or pull the lifting assembly 4 to move. After being pushed, the lifting assembly 4 flips around the rotating member 3 as the center of the circle. When the first connecting rod 7 pushes the lifting assembly 4, the lifting assembly 4 rotates downward around the rotating member 3, driving the load-bearing wheel 5 to descend. At the same time, since the load-bearing wheel 5 and the lifting assembly 4 are connected by the second hinge, the load-bearing wheel 5 can be rotated by the second hinge when it contacts the ground after the lifting assembly 4 is flipped, thereby ensuring parallel contact with the ground. When the first connecting rod 7 pulls the lifting assembly 4, the load-bearing wheel 5 is driven to rise by the same principle.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small-wheel retractable fork structure for a mechanical forklift, comprising a forklift body (1), wherein a fork (2) is arranged on the forklift body (1), and characterized in that: The front end of the fork (2) is provided with a lifting assembly (4) via a rotating member (3); the lifting assembly (4) is provided with a load-bearing wheel (5) that can rotate around a connection point; the lifting assembly (4) is connected to one end of a first connecting rod (7) via a hinge rod (6); the other end of the first connecting rod (7) is connected to a driving assembly (8); The driving assembly (8) drives the first connecting rod (7) to move, and under the action of the lever, drives the lifting assembly (4) to flip with the rotating member (3) as the center of the circle, thereby driving the load-bearing wheel (5) to rise and fall.

2. The small wheel retractable fork structure for a mechanical forklift according to claim 1, characterized in that: The lifting assembly (4) comprises a flipping member (401), wherein the flipping member (401) is fixed to the fork (2) via a rotating member (3), and the flipping member (401) is a symmetrical clamping structure composed of two clamping plates, and the two clamping plates are provided with mounting plates (402), and the load-bearing wheel (5) is installed via the mounting plate (402), and the load-bearing wheel (5) is arranged between the two clamping plates via a second hinge rod (9). After the flipping member (401) is flipped around the rotating member (3) as the center under the push of the first connecting rod (7), the load-bearing wheel (5) will adjust its angle around the second hinge rod (9) as the center to keep it parallel to the ground.

3. The small wheel retractable fork structure for a mechanical forklift according to claim 1, characterized in that: The first connecting rod (7) is configured as a driving shaft (7a).

4. The small wheel retractable fork structure for a mechanical forklift according to claim 3, characterized in that: The driving assembly (8) comprises a second connecting rod (801a) connected to the driving shaft (7a), the second connecting rod (801a) being fixed to the fork (2) via a rotating rod (802a), and the second connecting rod (801a) being connected to a driver 1 (803a).

5. The small wheel retractable fork structure for a mechanical forklift according to claim 1, characterized in that: The first connecting rod (7) is configured as a screw rod (7b), one end of the screw rod (7b) is connected to the lifting assembly (4) via a rotating sleeve (803b), and the other end of the screw rod (7b) is connected to the driving assembly (8).

6. The small wheel retractable fork structure for a mechanical forklift according to claim 5, characterized in that: The driving assembly (8) comprises a lifting block (801b) sleeved on the screw rod (7b), the lifting block (801b) being connected to the fork (2) via a lifting shaft (802b), and a second driver (804b) being provided at the end of the screw rod (7b), the second driver (804b) being fixed via the lifting block (801b).

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