Forklift

Abstract

The utility model discloses a forklift which comprises an inner door frame, an outer door frame and a pallet fork, the pallet fork is arranged on the inner door frame in a sliding mode, the inner door frame can slide relative to the outer door frame in the height direction so as to drive the pallet fork to ascend and descend, and the pallet fork can slide relative to the inner door frame in the height direction. According to the utility model, the pallet fork is not fixedly connected with the inner door frame, but is connected with the inner door frame in a sliding manner, so that the pallet fork can lift relative to the inner door frame. When the forklift is located in a compartment and other environments with limited height, lifting of the pallet fork can be achieved through sliding between the pallet fork and the inner portal frame, and when the pallet fork is lifted, the inner portal frame and the outer portal frame are kept still and do not collide with the top of the compartment to interfere with lifting of the pallet fork.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a forklift. Background Art

[0002] A forklift is a tool used to transport goods. A forklift usually includes a fork for lifting goods and a mast for driving the fork to rise and fall. The mast includes an inner mast and an outer mast. The fork is fixed on the inner mast, and the inner mast slides relative to the outer mast to achieve the lifting of the fork and then lift the goods.

[0003] However, since the forks are fixed to the inner mast and raised and lowered by the sliding movement of the inner mast relative to the outer mast, the inner mast and the forks rise together. When the forklift is inside a vehicle or other low-lying space, there is no room above the inner mast for them to slide upwards, and the forks cannot rise, thus failing to lift any cargo. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a forklift for solving the problem in the prior art that the fork cannot lift goods in a space with limited height because the inner mast needs to be raised and lowered together with the fork.

[0005] The technical solution adopted by the utility model to solve its technical problems is a forklift, comprising: an inner mast, an outer mast and a cargo fork, wherein the cargo fork can be slidably arranged on the inner mast, the inner mast can slide in the height direction relative to the outer mast to drive the cargo fork to rise and fall, and the cargo fork can slide in the height direction relative to the inner mast.

[0006] Furthermore, a rack is provided on the inner mast along the height direction, and a gear is rotatably provided on the fork, and the gear is engaged with the rack.

[0007] Furthermore, the inner mast includes two side plates arranged opposite to each other, the rack is provided on the inner side of each side plate, the gears are provided on both sides of the fork, and the two gears are respectively engaged with one rack.

[0008] Furthermore, a driving motor is included, and the driving motor is used to drive the gear to rotate.

[0009] Furthermore, a driving cylinder is provided between the inner mast and the fork, one end of the driving cylinder is connected to the inner mast, and the other end is connected to the fork, and the driving cylinder is extended and retracted to drive the fork to rise and fall.

[0010] Furthermore, it also includes a sliding block and a chain, the sliding block is slidably connected to the inner mast, a sprocket is provided on the sliding block, the chain is wound around the sprocket, and one end of the chain is connected to the inner mast, and the other end is connected to the fork.

[0011] Furthermore, a lifting cylinder is provided, one end of which is connected to the inner door frame, and the other end of which is connected to the sliding block.

[0012] Furthermore, a sprocket is provided on both sides of the sliding block, a chain is wound around each sprocket, and the two sprockets are symmetrical about the lifting cylinder.

[0013] Furthermore, the inner door frame also includes a top plate and a bottom plate, the cylinder body of the lifting cylinder is fixed to the bottom plate, and a guide column is fixed on the top plate. The guide column can extend into the sliding block and be slidably connected to the sliding block.

[0014] Furthermore, a through hole is provided on the sliding block, a blind hole is provided on one end of the piston rod of the lifting cylinder, and one end of the guide column can pass through the through hole and extend into the blind hole.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The forks are not fixedly connected to the inner mast, but rather slide, allowing the forks to be raised and lowered relative to the inner mast. When the forklift is in a height-restricted environment, such as a vehicle compartment, the forks can be raised and lowered by sliding between the forks and the inner mast. During this process, both the inner and outer masts remain stationary, preventing them from striking the roof of the vehicle compartment and interfering with the forks' movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a forklift in the embodiment;

[0018] Figure 2 Schematic diagram of the structure of the sliding block, guide column and lifting cylinder in the embodiment;

[0019] In the picture:

[0020] 100. Fork;

[0021] 200, external door frame;

[0022] 300, inner door frame;

[0023] 400, lifting cylinder;

[0024] 500, sliding block;

[0025] 600, sprocket;

[0026] 700. Guide column. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Please refer to Figure 1-Figure 2 The utility model discloses a forklift, comprising: an inner mast 300, an outer mast 200 and a fork 100, wherein the fork 100 is slidably arranged on the inner mast 300, and the inner mast 300 can slide in a height direction relative to the outer mast 200 to drive the fork 100 to rise and fall, and the fork 100 can slide in a height direction relative to the inner mast 300.

[0029] Specifically, the fork 100 and the inner mast 300 in the present application are not fixedly connected, but are slidably connected, allowing the fork 100 to be raised and lowered relative to the inner mast 300. When the forklift is in an environment with limited height, such as a vehicle compartment, the fork 100 can be raised and lowered by sliding between the fork 100 and the inner mast 300. When the fork 100 is raised or lowered, the inner mast 300 and the outer mast 200 remain stationary and will not hit the top of the vehicle compartment and interfere with the lifting of the fork 100.

[0030] Furthermore, a rack is provided on the inner mast 300 along the height direction, and a gear is rotatably provided on the fork 100, and the gear is engaged with the rack.

[0031] It should be noted that in height-restricted environments, the forks 100 only need to be raised a small distance to separate the cargo from the supporting surface (such as the vehicle floor). When the forklift moves to a wider space, the inner mast 300 can be raised, thereby driving the forks 100 to a higher height. Therefore, the sliding movement of the forks 100 relative to the inner mast 300 is only used for temporary lifting, and the connection between the two does not need to be constantly subjected to large forces.

[0032] Based on this, the present application sets a rack on the inner mast 300 and a gear on the fork 100, and realizes the lifting and lowering of the fork 100 relative to the inner mast 300 through the meshing of the gear and rack, and can also ensure that there is sufficient strength between the fork 100 and the inner mast 300 to cope with temporary lifting.

[0033] Furthermore, the inner mast 300 includes two oppositely arranged side panels, the rack is provided on the inner side of each side panel, the gears are provided on both sides of the fork 100, and the two gears are respectively engaged with one rack.

[0034] A rack and a rack are respectively provided on both sides, so that the left and right sides of the fork 100 rise synchronously without tilting left and right, and the posture of the goods is more stable when lifting.

[0035] Furthermore, a driving motor is included, and the driving motor is used to drive the gear to rotate.

[0036] By driving the gear to rotate through the drive motor, the fork 100 can be driven to rise and fall. Of course, a speed reduction mechanism can be provided between the drive motor and the gear to amplify the torque of the drive motor and realize the lifting of the goods.

[0037] Furthermore, a driving cylinder is provided between the inner mast 300 and the fork 100 , one end of the driving cylinder is connected to the inner mast 300 , and the other end is connected to the fork 100 , and the driving cylinder is extended and retracted to drive the fork 100 to move up and down.

[0038] Specifically, the fork 100 can be driven to slide relative to the inner mast 300 in the height direction by the extension and contraction of the driving cylinder to achieve the lifting and lowering of the fork 100. Of course, a driving cylinder can also be provided while the rack and pinion are provided to replace the driving motor, in which case the gears and gears act as guides.

[0039] Furthermore, it also includes a sliding block 500 and a chain, the sliding block 500 is slidably connected to the inner mast 300, a sprocket 600 is provided on the sliding block 500, the chain is wound around the sprocket 600, and one end of the chain is connected to the inner mast 300, and the other end is connected to the fork 100.

[0040] Specifically, a sliding block 500 is provided, and a sprocket 600 and a chain are provided on the sliding block 500. The chain is driven to drag the fork 100 upward by the up and down movement of the sliding block 500. In this process, the sprocket 600 is a movable pulley, which can reduce the driving force when lifting the goods.

[0041] Furthermore, a lifting cylinder 400 is provided, one end of the lifting cylinder 400 is connected to the inner mast 300 , and the other end is connected to the sliding block 500 .

[0042] The lifting cylinder 400 drives the sliding block 500 to move up and down, thereby achieving the lifting of the fork 100.

[0043] Furthermore, a sprocket 600 is provided on both sides of the sliding block 500 , a chain is wound around each sprocket 600 , and the two sprockets 600 are symmetrical with respect to the lifting cylinder 400 .

[0044] Furthermore, the inner door frame 300 also includes a top plate and a bottom plate. The cylinder body of the lifting cylinder 400 is fixed to the bottom plate. A guide column 700 is fixed on the top plate. The guide column 700 can extend into the sliding block 500 and be slidably connected to the sliding block 500.

[0045] Furthermore, a through hole is provided on the sliding block 500 , a blind hole is provided on one end of the piston rod of the lifting cylinder 400 , and one end of the guide column 700 can pass through the through hole and extend into the blind hole.

[0046] Specifically, the guide post 700 passes through the through hole and then extends into the blind hole, thereby constraining the sliding direction of the sliding block 500, thereby making the posture of the fork 100 more stable when it is raised or lowered.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0050] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A forklift, characterized in that: include: An inner mast, an outer mast and a fork, wherein the fork is slidably arranged on the inner mast, the inner mast can slide in a height direction relative to the outer mast to drive the fork to rise and fall, and the fork can slide in a height direction relative to the inner mast.

2. A forklift according to claim 1, characterized in that: A rack is provided on the inner mast along the height direction, and a gear is rotatably provided on the fork, and the gear is engaged with the rack.

3. A forklift according to claim 2, characterized in that: The inner mast includes two side plates arranged opposite to each other, the rack is provided on the inner side of each side plate, the gears are provided on both sides of the fork, and the two gears are respectively engaged with one rack.

4. A forklift according to claim 2, characterized in that: It also includes a driving motor, which is used to drive the gear to rotate.

5. The forklift according to claim 1, characterized in that: A driving cylinder is further provided between the inner mast and the fork, one end of the driving cylinder is connected to the inner mast, and the other end is connected to the fork, and the driving cylinder is extended and retracted to drive the fork to rise and fall.

6. The forklift according to claim 1, characterized in that: It also includes a sliding block and a chain, the sliding block is slidably connected to the inner door frame, a sprocket is provided on the sliding block, the chain is wound around the sprocket, and one end of the chain is connected to the inner door frame, and the other end is connected to the fork.

7. A forklift according to claim 6, characterized in that: A lifting oil cylinder is also provided, one end of which is connected to the inner door frame, and the other end is connected to the sliding block.

8. A forklift according to claim 7, characterized in that: A sprocket is respectively provided on both sides of the sliding block, a chain is wound around each of the sprockets, and the two sprockets are symmetrical about the lifting cylinder.

9. The forklift according to claim 7, characterized in that: The inner door frame also includes a top plate and a bottom plate. The cylinder body of the lifting cylinder is fixed to the bottom plate. A guide column is fixed on the top plate. The guide column can extend into the sliding block and be slidably connected to the sliding block.

10. The forklift according to claim 9, characterized in that: A through hole is provided on the sliding block, a blind hole is provided on one end of the piston rod of the lifting oil cylinder, and one end of the guide column can pass through the through hole and extend into the blind hole.

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