Compact forklift gantry structure

Abstract

The utility model relates to the technical field of forklift door frames, and particularly discloses a compact forklift door frame structure which comprises a door frame assembly, the door frame assembly comprises an inner door frame, a middle door frame and an outer door frame, the inner door frame is arranged on the inner side of the middle door frame in a lifting mode, and the middle door frame is arranged on the inner side of the outer door frame in a lifting mode. First channel steel with a first guide groove is arranged on the inner door frame, second channel steel with a second guide groove and a first guide wheel is arranged on the middle door frame, third channel steel with a second guide wheel is arranged on the outer door frame, the first guide wheel is movably clamped in the first guide groove, and the second guide wheel is movably clamped in the second guide groove. The inner door frame can ascend and descend relative to the middle door frame, the middle door frame can ascend and descend relative to the outer door frame, and therefore three-level ascending and descending of the pallet fork are achieved, the front side face of the first steel channel and the front side face of the third steel channel are located in the same vertical plane, the purpose of reducing the thickness of the door frame assembly can be achieved, and the overall length of the forklift is further reduced. And the trafficability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door frame structures, in particular to a compact forklift door frame structure. Background Art

[0002] The mast structure of a forklift includes a mast assembly and a fork frame assembly. In order to increase the lifting height of the fork, the mast assembly is usually arranged to include an inner mast, a middle mast and an outer mast. The fork frame assembly can be lifted or lowered on the inner mast, the inner mast can be lifted or lowered on the middle mast, and the middle mast can be lifted or lowered on the outer mast, thereby realizing three-level lifting of the fork. At the same time, in order to increase the forking angle range of the fork, the fork assembly includes a mounting frame and a tilting frame. The fork is installed on the tilting frame, and the tilting frame is rotatably installed on the mounting frame. Its rotation can drive the fork to rotate, thereby realizing the angle adjustment of the fork.

[0003] In order to guide the lifting of the inner mast and the middle mast, a first channel steel is provided on the inner mast, a second channel steel is provided on the middle mast, and a third channel steel is provided on the outer mast. A first guide groove is provided on the first channel steel, a first guide wheel and a second guide groove are provided on the middle mast, and a second guide wheel is provided on the third channel steel. The first guide wheel is movably arranged in the first guide groove, and the second guide wheel is movably arranged in the second guide groove. However, the conventional first channel steel, the second channel steel and the third channel steel are arranged tilted as a whole, that is, the first channel steel, the second channel steel and the third channel steel are tilted along the front and rear directions, which will increase the overall thickness of the mast in the front and rear directions, and thus increase the overall length of the forklift; at the same time, the tilting frame is generally hinged to the mounting frame through a rear ear plate, which will result in a front-to-back spacing between the tilting frame and the mounting frame, and then cause the tilting frame to be far away from the mast, that is, the fork is relatively far away from the mast, which will also increase the length of the forklift, occupy a larger overall area, and have poor passability. Summary of the invention

[0004] The present invention is made in consideration of the above-mentioned problems. The purpose of the utility model is to provide a compact forklift mast structure, which can reduce the thickness of the mast in the front-to-back direction and reduce the overall length of the fork frame assembly, thereby reducing the overall length of the forklift, reducing the space it occupies and improving its passability.

[0005] To achieve the above-mentioned purpose, the utility model provides a compact forklift mast structure, including a mast assembly, the mast assembly including an inner mast, a middle mast and an outer mast, the inner mast can be lifted and arranged on the inner side of the middle mast, the middle mast can be lifted and arranged on the inner side of the outer mast, the inner mast is provided with a first channel steel with a first guide groove, the middle mast is provided with a second channel steel with a second guide groove and a first guide wheel, the outer mast is provided with a third channel steel with a second guide wheel, the first guide wheel can be movably clamped in the first guide groove, and the second guide wheel can be movably clamped in the second guide groove;

[0006] The front side surface of the first channel steel and the front side surface of the third channel steel are located in the same vertical plane.

[0007] According to the above-mentioned compact forklift mast structure, it also includes a fork frame assembly, and the fork frame assembly includes a mounting frame, a tilting frame and a rotating shaft. The mounting frame can be raised and lowered to be connected to the inner mast, and the rotating shaft is fixed on the mounting frame. The tilting frame can be rotatably connected to the mounting frame through the rotating shaft and can be fitted with the mounting frame.

[0008] According to the above-mentioned compact forklift gantry structure, the mounting frame includes a first frame body and a supporting crossbeam, the first frame body can be raised and lowered to connect with the inner gantry, the supporting crossbeam is horizontally arranged on the first frame body, and the rotating shaft is arranged on the supporting crossbeam along the length direction of the supporting crossbeam;

[0009] The tilting frame includes a second frame body and a movable beam. The movable beam is horizontally arranged on the second frame body. The movable beam is located directly above the supporting beam and is rotatably connected to the supporting beam via the rotating shaft.

[0010] According to the above-mentioned compact forklift gantry structure, a sliding block is provided at the bottom of the movable beam, and a sliding groove matched with the rotating shaft is provided on the sliding block, and the rotating shaft can extend into the sliding groove.

[0011] According to the above-mentioned compact forklift gantry structure, the fork frame assembly also includes a transverse cylinder, which is fixed on the supporting beam and connected to the second frame body to drive the tilt frame to move along the length direction of the rotating shaft.

[0012] According to the above-mentioned compact forklift mast structure, the fork frame assembly further includes a tilting cylinder, two of which are symmetrically arranged at the bottom of the second frame body and are used to drive the second frame body to rotate.

[0013] The utility model has the following beneficial effects:

[0014] 1. The front side of the first channel steel and the front side of the third channel steel are located in the same vertical plane, so it can be ensured that the first channel steel, the second channel steel and the third channel steel are not arranged tilted in the front-to-back direction as a whole, thereby achieving the purpose of reducing the thickness of the mast assembly in the front-to-back direction, thereby reducing the overall length of the forklift and improving its passability;

[0015] 2. The mounting frame and the tilting frame in the fork frame assembly are arranged in the up-down direction and are rotatably connected through a rotating shaft, which can minimize the front-to-back distance between the mounting frame and the tilting frame to the greatest extent, thereby achieving the purpose of reducing the overall length of the fork frame assembly, thereby reducing the overall length of the forklift and improving its passability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0017] Figure 2 is a schematic structural diagram of a fork frame assembly of an embodiment;

[0018] Figure 3 It is a schematic diagram of the assembly structure of the rotating shaft and the mounting frame of the embodiment.

[0019] In the figure:

[0020] 1. Mast assembly; 11. Inner mast; 111. First channel steel; 111a. First guide groove; 12. Middle mast; 121. Second channel steel; 121a. Second guide groove; 121b. First guide wheel; 13. Outer mast; 131. Third channel steel; 131a. Second guide wheel; 2. Fork frame assembly; 21. Mounting frame; 211. First frame body; 212. Support beam; 22. Tilt frame; 221. Second frame body; 222. Movable beam; 222a. Slider; 23. Rotating shaft; 24. Transverse cylinder; 25. Tilt cylinder. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1-2As shown, a compact forklift mast structure includes a mast assembly 1 and a fork frame assembly 2. The mast assembly 1 includes an inner mast 11, a middle mast 12 and an outer mast 13. The inner mast 11 is movably arranged on the inner side of the middle mast 12, and the middle mast 12 is movably arranged on the inner side of the outer mast 13. The inner mast 11 is provided with a first channel steel 111 with a first guide groove 111a, the middle mast 12 is provided with a second channel steel 121 with a second guide groove 121a and a first guide wheel 121b, and the outer mast 13 is provided with a third channel steel 131 with a second guide wheel 131a. The first guide wheel 121b is movably arranged in the first guide groove 111a. The second guide wheel 131a can be movably clamped in the second guide groove 121a, and the fork frame assembly 2 can be raised and lowered to connect with the inner mast 11, so that the fork frame assembly 2 can be raised and lowered relative to the inner mast 11, the inner mast 11 can be raised and lowered relative to the middle mast 12, and the middle mast 12 can be raised and lowered relative to the outer mast 13, thereby realizing three-level lifting of the fork. In this embodiment, the front side surface of the first channel steel 111 and the front side surface of the third channel steel 131 are located in the same vertical plane, that is, the three channel steels are not arranged in sequence along the front and rear directions, which can achieve the purpose of reducing the thickness of the mast assembly 1, thereby reducing the overall length of the forklift and improving its passability.

[0023] Specifically, the fork frame assembly 2 includes a mounting frame 21, a tilting frame 22 and a rotating shaft 23. The mounting frame 21 can be lifted and connected to the inner door frame 11. The rotating shaft 23 is fixed on the mounting frame 21. The tilting frame 22 can be rotatably connected to the mounting frame 21 through the rotating shaft 23 and can be fitted with the mounting frame 21. The mounting frame 21 includes a first frame body 211 and a supporting beam 212. The first frame body 211 can be lifted and connected to the inner door frame 11. The supporting beam 212 is arranged on the first frame body 211 in a horizontal and transverse direction. The rotating shaft 23 is arranged on the supporting beam 212 along the length direction of the supporting beam 212. The tilting frame 22 includes a second frame body 221 and a movable beam 222. The movable beam 222 is arranged on the second frame body 221 in a horizontal direction. The movable beam 222 is located directly above the supporting beam 212 and is rotatably connected to the supporting beam 212 through a rotating shaft 23. The supporting beam 212 and the movable beam 222 at the integral hinge of the mounting frame 21 and the tilting frame 22 are arranged up and down, which will reduce the front and rear distance between the mounting frame 21 and the tilting frame 22, thereby shortening the overall length of the fork frame assembly 2, further shortening the overall length of the forklift, improving its passability, and the fork frame assembly 2 has good integrity.

[0024] In order to realize the lateral movement and rotation of the movable beam 222 along the rotating shaft 23, a slider 222a is provided at the bottom of the movable beam 222, and the slider 222a is provided with a slide groove adapted to the rotating shaft 23, and the rotating shaft 23 can extend into the slide groove. At the same time, the fork frame assembly 2 also includes a transverse movement cylinder 24, which is fixed on the supporting crossbeam 212 and connected to the second frame body 221 to drive the tilting frame 22 to move along the length direction of the rotating shaft 23, and the second frame body 221 is driven to move left and right by the transverse movement cylinder 24, thereby driving the tilting frame 22 to move sideways as a whole, and driving the fork to move sideways through the tilting frame 22. At the same time, the fork assembly also includes a tilting cylinder 25, and the two tilting cylinders 25 are symmetrically arranged at the bottom of the second frame body 221, and are used to drive the second frame body 221 to rotate, drive the tilting frame 22 to rotate as a whole, and then drive the fork to tilt and rotate.

[0025] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, and the described embodiments are used to help understand the idea of ​​the utility model. The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but this will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] 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 the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A compact forklift mast structure, comprising a mast assembly, wherein the mast assembly comprises an inner mast, a middle mast and an outer mast, wherein the inner mast is escalably arranged on the inner side of the middle mast, and the middle mast is escalably arranged on the inner side of the outer mast, wherein: The inner mast is provided with a first channel steel with a first guide groove, the middle mast is provided with a second channel steel with a second guide groove and a first guide wheel, and the outer mast is provided with a third channel steel with a second guide wheel, the first guide wheel can be movably clamped in the first guide groove, and the second guide wheel can be movably clamped in the second guide groove; The front side surface of the first channel steel and the front side surface of the third channel steel are located in the same vertical plane.

2. A compact forklift gantry structure according to claim 1, characterized in that: It also includes a fork frame assembly, which includes a mounting frame, a tilting frame and a rotating shaft. The mounting frame can be raised and lowered to connect with the inner door frame, the rotating shaft is fixed on the mounting frame, and the tilting frame can be rotatably connected with the mounting frame through the rotating shaft and can fit with the mounting frame.

3. A compact forklift gantry structure according to claim 2, characterized in that: The mounting frame comprises a first frame body and a supporting crossbeam, the first frame body can be raised and lowered to connect with the inner door frame, the supporting crossbeam is horizontally arranged on the first frame body, and the rotating shaft is arranged on the supporting crossbeam along the length direction of the supporting crossbeam; The tilting frame includes a second frame body and a movable beam. The movable beam is horizontally arranged on the second frame body. The movable beam is located directly above the supporting beam and is rotatably connected to the supporting beam via the rotating shaft.

4. A compact forklift gantry structure according to claim 3, characterized in that: A sliding block is provided at the bottom of the movable beam, and a sliding groove matched with the rotating shaft is provided on the sliding block, and the rotating shaft can extend into the sliding groove.

5. A compact forklift gantry structure according to claim 4, characterized in that: The fork frame assembly also includes a transverse oil cylinder, which is fixed on the supporting crossbeam and connected to the second frame body to drive the tilting frame to move along the length direction of the rotating shaft.

6. A compact forklift gantry structure according to claim 3, characterized in that: The fork frame assembly also includes a tilting cylinder, two of which are symmetrically arranged at the bottom of the second frame body and are used to drive the second frame body to rotate.

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