A portal system and a fork lift truck

Abstract

This utility model relates to the technical field of forklift masts, and specifically discloses a mast system and a forklift. The mast system includes a first mast and a fork carriage. A first groove arranged vertically is provided on the first mast, and a first guide wheel is provided on the fork carriage. The first guide wheel is movably disposed in the first groove and can move up and down along the first groove. The gap between the first guide wheel and the first groove is between 0.08mm and 0.12mm. The overlap height between the fork carriage and the first mast is between 450mm and 550mm. By reducing the gap between the first guide wheel and the first groove, the stability between the fork carriage and the first mast can be improved, thereby reducing the overlap height between the fork carriage and the first mast. When the movement height of the fork carriage remains unchanged, the height of the first mast can be reduced, thereby saving costs and improving the overall passability of the forklift.

Description

Technical Field

[0001] This utility model relates to the technical field of forklift masts, and specifically to a mast system and a forklift. Background Technology

[0002] Forklifts are a common type of handling vehicle, mainly used for short-distance transport of goods or materials. To accommodate goods of different heights, forklifts are usually equipped with liftable forks. However, the lifting space of a single-stage forklift adjustment is limited, making it impossible to lift objects at high heights. Therefore, multi-stage masts have been developed, which can lift forks in multiple stages to expand the lifting height of the forks and increase the range of forks that can be lifted.

[0003] In existing technologies, multi-stage masts typically include an inner mast, a middle mast, and an outer mast. The middle mast has a groove on the side closest to the outer mast, while the inner mast has grooves on both sides. The outer mast is engaged in the middle mast's groove by a guide wheel to guide its lifting. The middle mast is also engaged in the inner mast's outer groove by a guide wheel to guide its lifting. The fork carriage is engaged in the inner mast's inner groove by a guide wheel to guide its lifting. However, because multi-stage masts typically use roller bearings, this can lead to significant dimensional errors in the grooves, resulting in a gap between the guide wheel and the groove ranging from 0.5mm to 1mm. This causes the outer mast and middle mast, the middle mast and inner mast, and the fork carriage and inner mast to wobble easily, especially when lifted to a high position, the swaying is more severe. Therefore, a longer overlap height needs to be maintained between the outer mast and middle mast, the middle mast and inner mast, the fork carriage, and the inner mast. That is, the overlap between the two needs to be longer to ensure the overall stability of the mast system. However, taking a mast system of more than 10 meters as an example, its overlap height is usually around 800mm. But a high overlap length will affect the overall lifting height of the forks. In order to ensure the lifting height of the forks, the height of the mast can only be further increased, which will result in the overall height of the mast system being too high, increasing costs and reducing the forklift's maneuverability. Utility Model Content

[0004] This utility model addresses the aforementioned problems and aims to provide a mast system and forklift that reduces the overlap height by decreasing the gap between the guide wheel and the slide rail, thereby reducing the overall height of the mast system, saving costs, and improving the overall passability of the forklift.

[0005] To achieve the above objectives, this utility model provides a gantry system, comprising:

[0006] The first gantry has a first sliding groove arranged vertically;

[0007] The fork carriage is provided with a first guide wheel, which is movably disposed in the first slide groove and can move up and down along the first slide groove;

[0008] The gap between the first guide wheel and the first slide groove is between 0.08mm and 0.12mm;

[0009] The overlap height between the fork carriage and the first mast is between 450mm and 550mm.

[0010] The gantry system described above further includes a second gantry. The first gantry is vertically and movably disposed inside the second gantry. A second sliding groove is provided on the outer side of the first gantry. A second guide wheel is provided on the inner side of the second gantry, and the second guide wheel is movably disposed in the second sliding groove.

[0011] According to the above-described gantry system, the gap between the second guide wheel and the second slide groove is between 0.08mm and 0.12mm;

[0012] The overlap height between the first gantry and the second gantry is between 450mm and 550mm.

[0013] The gantry system described above further includes a third gantry, the second gantry being vertically and flexibly disposed inside the third gantry, and the outer side of the second gantry being provided with a third sliding groove, the inner side of the third gantry being provided with a third guide wheel, the third guide wheel being movably disposed within the third sliding groove.

[0014] According to the above-described gantry system, the gap between the third guide wheel and the third sliding groove is between 0.08mm and 0.12mm;

[0015] The overlap height between the second gantry and the third gantry is between 450mm and 550mm.

[0016] According to the above-described gantry system, the first slide, the second slide, and the third slide are all manufactured by milling.

[0017] According to the above-described gantry system, the first gantry is designated as the inner gantry, the second gantry as the middle gantry, and the third gantry as the outer gantry.

[0018] The gantry system described above further includes a lifting cylinder, which is used to control the individual lifting and lowering of the fork carriage, the first gantry, and the second gantry.

[0019] The mast system described above also includes forks, two of which are symmetrically arranged on the fork carriage and detachably connected to the fork carriage.

[0020] A forklift, comprising:

[0021] Body;

[0022] The gantry system described above is located at the front of the vehicle body.

[0023] This utility model has the following beneficial effects:

[0024] 1. By reducing the gap between the three guide wheels and the corresponding slide grooves, the swaying amplitude can be reduced, thereby reducing the overlap height between the fork carriage and the first mast, the first mast and the second mast, and the second mast and the third mast, thus reducing the height of the fork carriage, the first mast and the second mast themselves, saving costs and improving the overall passability of the forklift.

[0025] 2. The first, second, and third slide grooves are all machined by milling, which can effectively improve the machining accuracy of the three slide grooves, thereby facilitating precise control of the assembly gap between the guide wheel and the corresponding slide groove.

[0026] 3. By reducing the gap between the guide wheel and the corresponding slide groove, the overall stability of the gantry can be improved, thereby increasing the overall rigidity of the gantry system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0028] Figure 2 This is a top view of the overall structure of the embodiment.

[0029] In the picture:

[0030] 100, First mast; 110, First slide rail; 120, Second slide rail; 200, Fork carriage; 210, First guide wheel; 300, Second mast; 310, Second guide wheel; 320, Third slide rail; 400, Third mast; 410, Third guide wheel; 500, Lifting cylinder; 600, Forks. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] like Figure 1-2As shown, a mast system includes a first mast 100, a fork carriage 200, a second mast 300, a third mast 400, a lifting cylinder 500, and forks 600. The fork carriage 200 is vertically and flexibly disposed inside the first mast 100, and the first mast 100 is vertically and flexibly disposed inside the second mast 300, thereby realizing three-stage lifting of the fork carriage 200, and thus realizing three-stage lifting of the forks 600.

[0033] In this embodiment, a first slide groove 110 arranged vertically is provided on the first mast 100, and a first guide wheel 210 is provided on the fork carriage 200. The first guide wheel 210 is movably disposed within the first slide groove 110 and can move up and down along the first slide groove 110. In this relationship, the first slide groove 110 is used to provide a rolling limit for the first guide wheel 210, restricting it to only move up and down in the vertical direction, thereby driving the fork carriage 200 to move up and down in the vertical direction, and the fork carriage 200 drives the forks 600 to move up and down. The size of the gap between the first guide wheel 210 and the first slide groove 110 determines the stability of the lifting action of the fork carriage 200. Therefore, in this embodiment, the gap between the first guide wheel 210 and the first slide groove 110 is set between 0.08mm and 0.12mm, which is different from the gap of 0mm in the prior art. The 5mm-1mm range significantly reduces the gap between the first guide wheel 210 and the first slide groove 110, resulting in better stability between them. The fork carriage 200 is less likely to slide on the first mast 100, thus requiring a lower overlap height between the fork carriage 200 and the first mast 100. A large overlap height is not necessary to ensure the stability of the fork carriage 200. Therefore, in this embodiment, the overlap height between the fork carriage 200 and the first mast 100 is between 450mm and 550mm, which is significantly lower than the approximately 800mm overlap height in the prior art. When the height of the fork carriage 200 and the first mast 100 remains constant, the lifting height of the fork 600 can be greatly increased. Conversely, when the lifting height of the fork 600 remains constant, the height of the first mast 100 can be reduced, thereby saving costs and improving the overall passability of the mast system.

[0034] In this embodiment, the above-mentioned overlap height data is based on the fact that the entire gantry system is more than ten meters high.

[0035] The overlap height refers to the overlapping portion of two components that can move relative to each other. In the above context, the overlap height refers to the overlapping portion between the fork carriage 200 and the first mast 100 when they move to their highest point. This overlapping portion plays a role in ensuring the stability and safety of the fork carriage 200. Therefore, the overlap height affects the height of the fork carriage 200 relative to the first mast 100. Under the premise that the height of the first mast 100 itself remains unchanged, the higher the overlap height, the lower the maximum height of the fork carriage 200, and vice versa. The maximum height of the fork carriage 200 determines the maximum height of the forks 600. In the existing technology, in order to meet the fork 600's lifting range requirements, when the overlap height is high, the height of the first mast 100 itself must be increased, which leads to increased costs. Moreover, a higher overall height of the mast system will result in poor forklift maneuverability.

[0036] Of course, improving the connection stability between the fork carriage 200 and the first mast 100 can also improve the overall rigidity of the mast system, which is also beneficial for increasing the cargo picking capacity.

[0037] Furthermore, the first mast 100 is heightably mounted inside the second mast 300, meaning that the first mast 100 can be raised or lowered relative to the second mast 300. When the first mast 100 rises along the second mast 300, the first mast 100 can drive the fork carriage 200 to rise synchronously. After rising to the correct position, the fork carriage 200 can also rise independently relative to the first mast 100, thereby realizing two-stage lifting and lowering adjustment of the forks 600 and increasing the fork lifting height range of the forks 600.

[0038] To enable the lifting and lowering action of the first gantry 100 relative to the second gantry 300, a second slide groove 120 is provided on the outer side of the first gantry 100, and a second guide wheel 310 is provided on the inner side of the second gantry 300. The second guide wheel 310 is movably disposed within the second slide groove 120. When the first gantry 100 is lifted and lowered relative to the second gantry 300, the second guide wheel 310 remains stationary to guide the first gantry 100. Similarly, by setting the gap between the second guide wheel 310 and the second slide groove 120 between 0.08mm and 0.12mm, the swaying of the first gantry 100 on the second gantry 300 is minimized. This also allows the overlap height between the first gantry 100 and the second gantry 300 to be maintained between 450mm and 550mm. By reducing the overlap height between the first gantry 100 and the second gantry 300, the height of the second gantry 300 itself can be reduced, thereby achieving the purpose of saving costs and reducing the overall height of the gantry.

[0039] Furthermore, the second mast 300 is vertically and heightably mounted inside the third mast 400, meaning the second mast 300 can move up and down relative to the third mast 400. When the second mast 300 rises along the third mast 400, it can drive the first mast 100 to rise, which in turn drives the fork carriage 200 to rise. Once in position, the first mast 100 can rise independently relative to the second mast 300, and it can also drive the fork carriage 200 to rise. Once in position, the fork carriage 200 can rise independently relative to the first mast 100. This allows for three-stage lifting of the fork carriage 200, thereby enabling three-stage lifting of the forks 600 and further increasing the fork lifting height of the forks 600.

[0040] To enable the lifting and lowering action of the second gantry 300 relative to the third gantry 400, a third slide groove 320 is provided on the outer side of the second gantry 300, and a third guide wheel 410 is provided on the inner side of the third gantry 400. The third guide wheel 410 is movably disposed within the third slide groove 320. When the second gantry 300 is lifted and lowered relative to the third gantry 400, the third guide wheel 410 remains stationary to guide the second gantry 300. Similarly, by setting the gap between the third guide wheel 410 and the third slide groove 320 between 0.08mm and 0.12mm, the swaying of the second gantry 300 on the third gantry 400 is minimized. This also allows the overlap height between the second gantry 300 and the third gantry 400 to be maintained between 450mm and 550mm. By reducing the overlap height between the second gantry 300 and the third gantry 400, the height of the third gantry 400 itself can be reduced, thereby achieving the purpose of saving costs and reducing the overall height of the gantry.

[0041] In this embodiment, since the heights of the first gantry 100, the second gantry 300, and the third gantry 400 can all be reduced, the overall height of the gantry system can be reduced, costs can be lowered, and the overall passability of the gantry system can be improved.

[0042] The gap between the first guide wheel 210 and the first slide groove 110 can be 0.08mm, 0.1mm, 0.12mm, etc.; the overlap height between the fork carriage 200 and the first mast 100 can be 450mm, 500mm, 550mm, etc.; the gap between the second guide wheel 310 and the second slide groove 120 can be 0.08mm, 0.1mm, 0.12mm, etc.; the overlap height between the first mast 100 and the second mast 300 can be 450mm, 500mm, 550mm, etc.; the gap between the third guide wheel 410 and the third slide groove 320 can be 0.08mm, 0.1mm, 0.12mm, etc.; and the overlap height between the second mast 300 and the third mast 400 can be 450mm, 500mm, 550mm, etc.

[0043] Among them, passability refers to the ability of the mast system or forklift to pass through indoors. The lower the height, the better the passability. If the height is too high, it will cause interference with the door frame or other objects.

[0044] In this embodiment, in order to reduce the gaps between the first guide wheel 210 and the first slide groove 110, the second guide wheel 310 and the second slide groove 120, and the third guide wheel 410 and the third slide groove 320, the accuracy of the first slide groove 110, the second slide groove 120, and the third slide groove 320 is improved. To improve the dimensional accuracy of the three, precision machining can be used. In this embodiment, the first slide groove 110, the second slide groove 120, and the third slide groove 320 are all manufactured by milling. Of course, precision machining methods such as laser cutting can also be used, which should not exceed the scope of this embodiment.

[0045] In this embodiment, the first gantry 100 is designated as the inner gantry, the second gantry 300 as the middle gantry, and the third gantry 400 as the outer gantry.

[0046] Furthermore, in order to achieve independent lifting of the fork carriage 200, the first mast 100 and the second mast 300, the lifting cylinder 500 is used to control the individual lifting of the fork carriage 200, the first mast 100 and the second mast 300, and multiple lifting cylinders 500 can be used for independent control.

[0047] In this embodiment, two forks 600 are symmetrically arranged on the fork carriage 200. The two forks 600 are used to cooperate with each other to pick up goods, and both forks 600 can be detachably connected to the fork carriage 200 for easy maintenance.

[0048] Furthermore, a forklift includes a body and a mast system as described above, the mast system being located at the front of the body. Since the mast system is the tallest part of the forklift, reducing the height of the mast system relatively reduces the overall height of the forklift, thereby improving the overall maneuverability of the forklift.

[0049] This embodiment discloses a mast system and a forklift. The mast system includes a first mast 100 and a fork carriage 200. The first mast 100 is provided with a first slide groove 110 arranged vertically. The fork carriage 200 is provided with a first guide wheel 210. The first guide wheel 210 is movably disposed in the first slide groove 110 and can move up and down along the first slide groove 110. The gap between the first guide wheel 210 and the first slide groove 110 is between 0.08mm and 0.12mm. The overlap height between the fork carriage 200 and the first mast 100 is between 450mm and 550mm. By reducing the gap between the first guide wheel 210 and the first slide groove 110, the stability between the fork carriage 200 and the first mast 100 can be improved, thereby reducing the overlap height between the fork carriage 200 and the first mast 100. When the movement height of the fork carriage 200 remains unchanged, the height of the first mast 100 can be reduced, thereby saving costs and improving the overall passability of the forklift.

[0050] The technical solution of this utility model has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of this utility model. The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0051] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0052] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A portal system, characterized in that, include: The first gantry has a first sliding groove arranged vertically; The fork carriage is provided with a first guide wheel, which is movably disposed in the first slide groove and can move up and down along the first slide groove; The gap between the first guide wheel and the first slide groove is between 0.08mm and 0.12mm; The overlap height between the fork carriage and the first mast is between 450mm and 550mm.

2. A portal system according to claim 1, characterized in that It also includes a second gantry, the first gantry is vertically and flexibly disposed inside the second gantry, the outer side of the first gantry is provided with a second slide groove, the inner side of the second gantry is provided with a second guide wheel, and the second guide wheel is movably disposed in the second slide groove.

3. A portal system according to claim 2, wherein, The gap between the second guide wheel and the second slide groove is between 0.08mm and 0.12mm; The overlap height between the first gantry and the second gantry is between 450mm and 550mm.

4. A portal system according to claim 2, wherein, It also includes a third gantry, the second gantry is vertically and flexibly disposed inside the third gantry, and the outer side of the second gantry is provided with a third sliding groove, the inner side of the third gantry is provided with a third guide wheel, and the third guide wheel is movably disposed in the third sliding groove.

5. A gantry system according to claim 4, characterized in that, The gap between the third guide wheel and the third sliding groove is between 0.08mm and 0.12mm; The overlap height between the second gantry and the third gantry is between 450mm and 550mm.

6. A portal system according to claim 5, wherein, The first slide, the second slide, and the third slide are all manufactured by milling.

7. A portal system according to claim 5, wherein, The first gantry is designated as the inner gantry, the second gantry as the middle gantry, and the third gantry as the outer gantry.

8. A portal system according to claim 5, wherein, It also includes a lifting cylinder, which is used to control the individual lifting and lowering of the fork carriage, the first mast, and the second mast.

9. A portal system according to claim 1, wherein, It also includes forks, two of which are symmetrically arranged on the fork carriage and detachably connected to the fork carriage.

10. A fork lift truck characterised in that, include: Body; The gantry system as described in any one of claims 1-9, wherein the gantry system is located at the front of the vehicle body.

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