CN115557427A

CN115557427A - Forklift structure with independent lifting fork

Info

Publication number: CN115557427A
Application number: CN202211027126.9A
Authority: CN
Inventors: 泮振宇; 田丰; 褚春波; 方浩翔; 张翔龙
Original assignee: Ningbo Ruyi JSCL
Current assignee: Ningbo Ruyi JSCL
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2023-01-03

Abstract

The invention relates to the technical field of forklifts, and particularly discloses a forklift structure with independent lifting forks, which comprises: the frame assembly comprises a forklift main body positioned at the tail part of the forklift; the supporting leg assembly comprises at least two supporting legs, and the two supporting legs are symmetrically arranged on two sides of the front end of the forklift main body; the fork assembly comprises at least two forks, the forks correspond to the supporting legs one by one, the two forks are respectively provided with a first position and a second position which are vertically distributed, and when the forks are positioned at the first position, the forks are attached to the supporting legs; the lifting assembly is positioned between the supporting leg and the pallet fork and can drive the pallet fork to switch between a first position and a second position; the lifting of the fork does not relate to a forklift body, the restriction of the lifting assembly on the size and the appearance of the forklift body can be avoided, the restriction is less when the forklift is designed, the structure is simpler compared with a connecting rod type structure, the weight of the forklift body is not required to be loaded during lifting, and energy can be saved.

Description

Forklift structure with independent lifting fork

Technical Field

The invention relates to the technical field of forklifts, in particular to a forklift structure with independent lifting forks.

Background

Fork truck can save a large amount of human costs by extensive application in the field of short distance transportation, comparatively convenient transport goods, and wherein the fork is fork truck's important component, in order to realize getting the demand that goods, and eminence transported goods from the bottom fork, generally set up the fork into liftable, utilize the lift of fork to satisfy the high demand of the fork of different working stages.

However, in the prior art, the pallet fork is generally directly connected with the main body of the forklift, and two lifting modes generally exist; the method comprises the following steps: the structure reduces the working space of the electric pallet truck, namely, the lifting device is arranged in the truck body, the lifting device is driven to lift by driving the front wheel frame to rotate, but the truck body can be driven to lift together in the lifting process, the lifting energy consumption can be greatly increased, and the lifting device is arranged in the truck body, the size and the working space of the truck body can be limited relatively, and the design of the truck body is not beneficial to the complex appearance structure of the vehicle; the second is as follows: guide rail type lifting, for example, patent with publication number CN105439044a, invention name of forklift, fork lifting system thereof and fork lifting control method, which discloses a fork lifting system, comprising: the fixing frame is used for fixing the fork and comprises a fixing frame body, a first coil and a second coil, and the first coil and the second coil are arranged on the fixing frame body; the first gantry comprises a first gantry body and a third coil, the third coil is arranged on the first gantry body, and the first gantry body comprises a guide groove which is used for accommodating the fixed frame; the control device is used for receiving an operation instruction of a user and controlling electric signals of the first coil, the second coil and the third coil according to the operation instruction so as to enable the fixing frame to suspend on the first door frame and lift along the guide groove; it can be seen that a portal is arranged on the front end face of the forklift body, a guide groove is formed in the portal, the fixing device for mounting the fork is driven to move up and down along the guide groove by utilizing the magnetic suspension principle, the fork is driven to move along the guide groove of the portal similarly to the oil cylinder, although the forklift body does not lift along with the fork, the forklift body is still fixed on the forklift body, firstly, the load changes along with the change of the vertical height, the tipping risk needs to be considered, and secondly, the appearance and the size of the forklift body can be influenced.

Disclosure of Invention

The invention is made in view of the above problems, and an object of the invention is to provide a forklift structure with independent lifting forks, wherein the forks lift independently, the appearance and the size of a forklift main body are not influenced, the design of a whole forklift is convenient, the structure is simple, and the load bearing capacity is small.

To achieve the above object, the present invention provides a forklift structure with independent lifting forks, comprising:

the frame assembly comprises a forklift main body positioned at the tail part of the forklift;

the supporting leg assembly comprises at least two supporting legs, and the two supporting legs are symmetrically arranged on two sides of the front end of the forklift main body;

the pallet fork assembly comprises at least one pallet fork, the pallet fork is provided with a first position and a second position which are vertically distributed, and when the pallet fork is located at the first position, the pallet fork is attached to the supporting leg;

and the lifting assembly is positioned between the supporting leg and the pallet fork and can drive the pallet fork to be switched between a first position and a second position.

According to the forklift structure with the independent lifting forks, two lifting assemblies are arranged, two forks are arranged, the two forks correspond to the two supporting legs one by one, and each lifting assembly is positioned between one group of forks and the supporting leg;

every lifting unit all includes the pin joint and is in lift cylinder on the supporting leg and connect the fork with the first swing arm and the second swing arm of supporting leg, lift cylinder's piston rod with the fork meets.

According to the forklift structure with the independent lifting fork, the first swing arm and the second swing arm are both H-shaped, and the fork is provided with the first hinge part positioned at the rear end part and the second hinge part positioned at the front end part;

one end of the first swing arm is hinged to the supporting leg, the other end of the first swing arm is hinged to the first hinge portion, one end of the second swing arm is hinged to the supporting leg, and the other end of the second swing arm is hinged to the second hinge portion.

According to the forklift structure with the independent lifting fork, the first hinge part comprises two first positioning plates which are arranged in parallel, a first positioning hole is formed in each first positioning plate, the second hinge part comprises two second positioning plates which are arranged in parallel, and a second positioning hole is formed in each second positioning plate;

the upper end of the first swing arm is attached to the two outer sides of the first positioning plates, a third positioning hole communicated with the first positioning hole is formed in the upper end of the first swing arm, the upper end of the second swing arm is attached to the two outer sides of the second positioning plates, and a fourth positioning hole communicated with the second positioning hole is formed in the upper end of the second swing arm.

According to the fork truck structure with independent lift fork, lift cylinder passes through a rotatable connection of pivot on the supporting leg, lift cylinder's piston rod upper end is inserted and is established two between the first locating plate, just the piston rod upper end is equipped with the fifth locating hole with first locating hole and third locating hole intercommunication.

According to the fork truck structure with independent lift fork, the fork downside is equipped with a constant head tank, works as when the fork is located the first position, the fork passes through the constant head tank cladding is in the supporting leg outside.

According to the forklift structure with the independent lifting fork, the positioning groove is internally provided with the limiting groove, and when the fork is positioned at the first position, the lifting oil cylinder is positioned in the limiting groove.

According to the fork truck structure with independent lift fork, the fork is close to one of fork truck main part is served and is equipped with a limiting plate, works as when the fork is located the second position, the limiting plate with fork truck main part butt.

According to the fork truck structure with independent lift fork, still include the supporting wheelset, the supporting wheelset is including setting up the first supporting wheel of fork truck main part bottom and setting are in the second supporting wheel of supporting leg bottom, the second supporting wheel is located the supporting leg is kept away from the bottom of fork truck main part one end.

According to the fork truck structure with independent lift fork, the frame subassembly still includes operating handle, operating handle is used for controlling the action of fork truck main part.

The invention has the following beneficial effects: the lifting assembly of the fork is arranged between the fork and the supporting legs, namely the lifting of the fork does not relate to a forklift main body, the limitation of the lifting assembly on the size and the appearance of the forklift main body can be avoided, the limitation is less when the forklift is designed, the structure is simpler compared with a connecting rod type structure, the weight of the forklift main body is not required to be loaded during lifting, the energy can be saved, and the loss of the oil cylinder is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a schematic view of the first position of the fork and the support leg assembly of the present embodiment;

FIG. 3 is a schematic view of the second position of the fork and the support leg assembly of the present embodiment;

fig. 4 is a schematic view of the bottom structure of the fork of the present embodiment.

In the figure: 1. a frame assembly; 11. a forklift main body; 12. an operating handle; 2. a support leg assembly; 21. supporting legs; 3. a fork assembly; 31. a pallet fork; 311. a first positioning plate; 3111. a first positioning hole; 312. a second positioning plate; 3121. a second positioning hole; 313. positioning a groove; 3131. a limiting groove; 314. a limiting plate; 4. a lifting assembly; 41. a lift cylinder; 42. a first swing arm; 421. a third positioning hole; 43. a second swing arm; 431. a fourth positioning hole; 5. a support wheel set; 51. a first support wheel; 52. a second support wheel.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-4, a forklift structure with independent lift forks includes:

frame subassembly 1, it is including the fork truck main part 11 that is located the fork truck afterbody, and fork truck main part 11 is located the holistic afterbody of fork truck for place control unit.

Supporting leg assembly 2, it includes two at least supporting legs 21, two supporting leg 21 symmetry sets up the both sides of 11 front ends of fork truck main part, two supporting legs 21 play the supporting role, both can prevent that fork truck wholly from leaning forward, can provide the supporting role for fork 31 again.

The fork assembly 3 comprises at least one fork 31, each fork 31 has a first position and a second position which are vertically distributed, when the fork 31 is located at the first position, the fork 31 is attached to the supporting leg 21, in this embodiment, the first position refers to a position where the fork 31 is located at the lowest point, at this time, the fork 31 is attached to the supporting leg 21, and the second position refers to a position where the fork 31 is located at the highest point, that is, the height of the fork 31 can be changed, so that the lifting movement is performed.

Lifting unit 4, it is located supporting leg 21 with between the fork 31, and can drive fork 31 switches between primary importance and second place, then lifting unit 4 connects supporting leg 21 and fork 31 simultaneously, utilize lifting unit 4 drive fork 31 to carry out elevating movement, then lifting unit 4 and fork truck main part 11 are the design of disconnect-type, can guarantee lifting unit 4 and fork truck main part 11's independence, the lift of fork 31 does not have the associativity with fork truck main part 11 promptly, can be convenient for to the holistic design of fork truck, and lifting unit 4 need not to bear the weight of fork truck main part 11, can reduce the energy consumption.

Preferably, two lifting assemblies 4 are provided, two forks 31 are provided, the forks 31 correspond to the supporting legs 21 one by one, and each lifting assembly 4 is positioned between one group of forks 31 and the supporting legs 21; each lifting assembly 4 comprises a lifting oil cylinder 41 pivoted on the supporting leg 21 and a first swing arm 42 and a second swing arm 43 which are connected with the pallet fork 31 and the supporting leg 21, a piston rod of the lifting oil cylinder 41 is connected with the pallet fork 31, each lifting assembly 4 drives one pallet fork 31, in order to realize synchronous lifting of the two pallet forks 31, a synchronous control mechanism can be arranged to control the two lifting oil cylinders 41 to synchronously act, when the piston rod of the lifting oil cylinder 41 extends out, the pallet fork 31 can be driven to move obliquely upwards, the first swing arm 42 and the second swing arm 43 rotate along with the first swing arm until the pallet fork 31 moves to the second position, when the piston rod of the lifting oil cylinder 41 contracts, the pallet fork 31 can be driven to move obliquely downwards, and the first swing arm 42 and the second swing arm 43 rotate along with the first swing arm 43 until the pallet fork 31 moves to the first position.

Further preferably, the first swing arm 42 and the second swing arm 43 are both H-shaped, and the fork 31 is provided with a first hinge portion located at the rear end portion and a second hinge portion located at the front end portion; one end of the first swing arm 42 is hinged to the supporting leg 21, the other end of the first swing arm 42 is hinged to the first hinged portion, one end of the second swing arm 43 is hinged to the supporting leg 21, the other end of the second swing arm 43 is hinged to the second hinged portion, namely the first swing arm 42 and the second swing arm 43 are hinged to the rear end portion and the front end portion of the fork 31 respectively, when the fork 31 rises to the second position, the first swing arm 42 and the second swing arm 43 are matched with the lifting oil cylinder 41 to support the fork 31, the front end and the rear end of the fork are supported simultaneously, and the anti-tipping effect is good.

Further preferably, the first hinge portion comprises two first positioning plates 311 arranged in parallel, a first positioning hole 3111 is arranged on the first positioning plate 311, the second hinge portion comprises two second positioning plates 312 arranged in parallel, and a second positioning hole 3121 is arranged on the second positioning plates 312; the upper end of the first swing arm 42 is attached to the outer sides of the two first positioning plates 311, a third positioning hole 421 communicated with the first positioning hole 3111 is formed in the upper end of the first swing arm 42, the upper end of the second swing arm 43 is attached to the outer sides of the two second positioning plates 312, a fourth positioning hole 431 communicated with the second positioning hole 3121 is formed in the upper end of the second swing arm 43, namely, a pin shaft is inserted into a communication hole between the first positioning hole 3111 and the third positioning hole 421, so that the first swing arm 42 can rotate relative to the fork 31, and a bolt is inserted into a communication hole between the second positioning hole 3121 and the fourth positioning hole 431, so that the second swing arm 43 can rotate relative to the fork 31.

Further preferably, the lift cylinder 41 is rotatably connected to the support leg 21 through a rotating shaft, the upper end of a piston rod of the lift cylinder 41 is inserted between the two first positioning plates 311, a fifth positioning hole communicated with the first positioning hole 3111 and the third positioning hole 421 is formed in the upper end of the piston rod, a pin shaft is inserted into the communication hole of the first positioning hole 3111, the third positioning hole 421 and the fifth positioning hole, that is, the piston rod of the lift cylinder 41 is hinged to the fork 31, so that the fork 31 can rotate relative to the piston rod, and the requirement of moving the position of the fork during lifting is met.

Preferably, the lower side of the fork 31 is provided with a positioning groove 313, when the fork 31 is located at the first position, the fork 31 is covered outside the supporting leg 21 through the positioning groove 313, that is, when the fork 31 descends to the lowest height, the fork 31 is covered on the supporting leg 21, the supporting leg 21 can play a better supporting role, and the fork 31 can be prevented from shaking.

It is further preferable that a limiting groove 3131 is formed in the positioning groove 313, and when the fork 31 is located at the first position, the lift cylinder 41 is located in the limiting groove 3131, and the limiting groove 3131 can limit the lift cylinder 41 and prevent the lift cylinder 41 from interfering with the fork 31.

Preferably, the fork is close to one of fork truck main part 11 is served and is equipped with a limiting plate 314, works as when fork 31 is located the second position, limiting plate 314 with fork truck main part 11 butt, when limiting plate 314 and fork truck main part 11 butt, fork 31 can't continue to move towards the incline direction, and at this moment, fork 31 is in the highest position, sets up limiting plate 314 and can increase the area of contact of fork 31 and fork truck main part 11, avoids causing the damage to fork truck main part 11.

Preferably, including supporting wheel set 5, supporting wheel set 5 is including setting up first supporting wheel 51 and the setting of the bottom of fork truck main part 11 are in the second supporting wheel 52 of supporting leg 21 bottom, second supporting wheel 52 is located the supporting leg 21 is kept away from the bottom of fork truck main part 11 one end, utilizes two supporting wheels to play the supporting role to the front and back end of fork truck, can prevent it from overturning.

Preferably, the frame assembly further comprises an operating handle 12, the operating handle 12 is used for controlling the forklift body 11 to act, and the operating handle 12 controls the overall movement of the forklift.

The technical solutions of the present invention are explained in detail above with reference to the accompanying drawings, and the described embodiments are used to help understanding the idea of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims

1. A forklift structure with independently lift forks, comprising:

and the lifting assembly is positioned between the supporting leg and the pallet fork and can drive the pallet fork to switch between a first position and a second position.

2. A forklift structure with independently liftable forks as claimed in claim 1, wherein there are two of said lifting assemblies, there are two of said forks, one for each of said support legs, and each of said lifting assemblies is located between a set of said forks and said support leg;

3. The forklift structure with independent lift forks of claim 2, wherein said first swing arm and said second swing arm are both H-shaped, and said fork is provided with a first hinge portion at the rear end portion and a second hinge portion at the front end portion;

one end of the first swing arm is hinged to the supporting leg, the other end of the first swing arm is hinged to the first hinged portion, one end of the second swing arm is hinged to the supporting leg, and the other end of the second swing arm is hinged to the second hinged portion.

4. The forklift structure with independent lift forks as claimed in claim 3, wherein said first articulated portion comprises two first positioning plates disposed in parallel, said first positioning plates being provided with first positioning holes, said second articulated portion comprises two second positioning plates disposed in parallel, said second positioning plates being provided with second positioning holes;

5. The forklift structure with independent lifting forks according to claim 4, wherein said lift cylinder is rotatably connected to said supporting legs through a rotating shaft, the upper end of the piston rod of said lift cylinder is inserted between said two first positioning plates, and the upper end of said piston rod is provided with a fifth positioning hole communicating with said first positioning hole and said third positioning hole.

6. A fork lift truck construction with independently liftable forks as claimed in claim 2, wherein said forks are provided with a detent groove on their underside, said forks being wrapped outside said support legs by said detent groove when said forks are in the first position.

7. The forklift structure with independently liftable forks of claim 6, wherein a position-limiting groove is provided in said positioning groove, and said lift cylinder is located in said position-limiting groove when said forks are in the first position.

8. The forklift structure with independently liftable forks of claim 1, wherein a limiting plate is disposed on an end of the fork near the forklift body, and the limiting plate abuts against the forklift body when the fork is in the second position.

9. The forklift structure with independent lifting forks of claim 1, further comprising a supporting wheel set, wherein said supporting wheel set comprises a first supporting wheel disposed at the bottom of said forklift body and a second supporting wheel disposed at the bottom of said supporting leg, said second supporting wheel is located at the bottom of one end of said supporting leg far from said forklift body.

10. The forklift structure with independent lift forks of claim 1, wherein said frame assembly further comprises an operating handle for controlling the operation of said forklift body.