Three-stage portal structure
By optimizing the three-stage gantry structure, the problems of long welding time, obstructed field of view and pipeline extrusion in the prior art are solved, and higher safety and economy are achieved.
Patent Information
- Application Number
- CN202422570708.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The existing three-stage gantry has a complex structure, long welding time and high cost. The pipeline layout affects the driver's vision, poor safety, and there is a risk of pipeline extrusion damage.
Optimize the three-stage gantry structure, set the pipeline mounting seat and chain on the back side of the gantry, adopt C-type and J-type channel steel design, add cross beams to avoid pipeline squeezing, optimize the layout of three- and four-link pipelines, and reduce welding time.
It improves the driver's vision, increases the gap between the gantry and the vehicle body, avoids squeezing and damage to the pipeline, and improves safety and economy.
Smart Images
Figure CN223175798U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of forklift mast, and particularly relates to a three-stage mast structure. Background Art
[0002] The three-stage forklift mast, also known as a three-section mast or telescopic mast, is a device used to improve the vertical lifting capacity and spatial flexibility of forklifts. Compared with the two-stage mast, the three-stage mast achieves a higher lifting height and more precise cargo handling capacity by adding an intermediate section, and is particularly suitable for warehouses, logistics centers, and production facilities with limited space or high stacking requirements.
[0003] The existing three-stage mast structure is relatively complex, the welding time of the mast welding joints is long, and the cost is high. The assembly of triple and quadruple pipelines is time-consuming and laborious. Especially after the installation of triple and quadruple hydraulic pipelines, the chains and pipelines are concentrated in front of the driver's field of vision, resulting in a poor driver's field of vision, and both driving safety and operation convenience are poor. Moreover, when the mast tilts backward, the clearance with the vehicle body is small, and there is a risk of pipeline extrusion and damage.
[0004] Therefore, in view of the above problems, a three-stage mast structure is proposed to solve the above problems. Content of the Utility Model<,
[0005] Aiming at the deficiencies of the prior art, the utility model develops a three-stage mast structure, which can increase the visual space in front of the driver, avoid affecting driving safety, and at the same time increase the clearance with the vehicle body, avoid pipeline extrusion and collision, and improve the economy of the device.
[0006] To achieve the above object, the utility model is realized through the following technical solutions:
[0007] A three-stage mast structure is arranged on the front side of the vehicle body of the forklift. Taking the forward direction of the forklift as the front, it includes an outer mast, a middle mast, and an inner mast. The outer mast is arranged on the vehicle body, the middle mast is slidably arranged on the outer mast, the inner mast is slidably arranged on the middle mast, a front lifting assembly is arranged on the inner mast and is connected to the fork carriage through the front lifting assembly, and a fork is arranged on the fork carriage for driving the fork to lift and lower; a rear lifting assembly is arranged behind the outer mast and is connected to the middle mast and the inner mast through the rear lifting assembly for driving the middle mast and the inner mast to lift and lower; a cross beam is arranged on the lower side behind the outer mast, a three-way body weldment and a speed limiter valve are arranged below the cross beam, and a high-pressure oil pipe is arranged on the inner side of the cross beam close to the outer mast. The three-way body weldment communicates with the speed limiter valve and the high-pressure oil pipe.
[0008] Preferably, the front lifting assembly includes a middle cylinder, a middle chain, a triple pipeline one, a quadruple pipeline one, and a pipeline mounting seat one. The middle cylinder is arranged in the middle of the inner gantry, the movement direction of the output end of the middle cylinder is vertically upward, the pipeline mounting seat one is arranged at the output end of the middle cylinder, one end of the middle cylinder chain is connected to the inner gantry, the other end is connected to the fork, and the middle cylinder chain slides around the side of the pipeline mounting seat one. The triple pipeline one and the quadruple pipeline one are respectively slidably arranged on the left and right sides of the pipeline mounting seat one.
[0009] Preferably, the rear lifting assembly includes a side cylinder, a side chain, a triple pipeline two, a quadruple pipeline two, a pipeline mounting seat two, and a sprocket. The side cylinder is arranged behind the outer gantry, the movement direction of the output end of the side cylinder is parallel to the movement direction of the output end of the middle cylinder, the output end of the side cylinder is arranged on the middle gantry and used to drive the middle gantry to lift and move. The sprocket is arranged at the rear of the middle gantry through a wheel shaft, the side chain is slidably hung on the sprocket, and one end of the side chain is connected to the outer gantry, the other end is connected to the inner gantry and used to drive the inner gantry to lift and move when the middle gantry lifts and moves. The pipeline mounting seat two is arranged behind the middle gantry, and the triple pipeline two and the quadruple pipeline two are slidably hung on the pipeline mounting seat two.
[0010] Preferably, it further includes a cargo retaining rack, which is arranged on the fork and behind the fork.
[0011] Preferably, the outer gantry is set as a C-shaped channel steel, and the middle gantry and the inner gantry are both set as J-shaped channel steels.
[0012] Preferably, the triple pipeline one and the triple pipeline two are connected through a transition joint one, the quadruple pipeline one and the quadruple pipeline two are connected through a transition joint two, and both the transition joint one and the transition joint two are arranged on the inner gantry. The triple pipeline one, the triple pipeline two, the quadruple pipeline one, and the quadruple pipeline two are all located between the cross beam and the fork.
[0013] The effects provided in the utility model content are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solutions have the following advantages:
[0014] By adjusting the traditional forklift mast structure, the utility model effectively shortens the welding time of the mast splicing point, optimizes the design of the triple and quadruple pipelines, arranges the pipeline mounting seat two and the side chain on the rear side of the mast, effectively avoiding the visual space in front of the driver and improving the safety during use; and a cross beam is arranged behind the mast to control the pipeline position in front of the cross beam, avoiding the possibility of extrusion damage to the pipeline when the mast tilts backward and improving the economy of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification. They are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model.
[0016] Figure 1 Schematic diagram of the rear view axonometric structure of the embodiment of the present utility model;
[0017] Figure 2 Schematic diagram of the front view axonometric structure of the embodiment of the present utility model.
[0018] In the figure, 1, outer gantry; 2, middle gantry; 3, inner gantry; 4, side chain; 5, side cylinder; 6, middle cylinder; 7, middle chain; 8, goods retaining shelf; 9, fork frame; 10, fork; 11, triple pipeline one; 12, quadruple pipeline one; 13, three-way body weldment; 14, speed limit valve; 15, triple pipeline two; 16, quadruple pipeline two; 17, transition joint one; 18, transition joint two; 19, high-pressure oil pipe; 20, pipeline mounting seat one; 21, pipeline mounting seat two. Specific embodiments
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0020] As Figure 1 - Figure 2 shown, the present utility model provides a technical solution:
[0021] A three-stage gantry structure is provided on the front side of the vehicle body of the forklift. With the forward direction of the forklift as the front, it includes an outer gantry 1, a middle gantry 2, and an inner gantry 3. The outer gantry 1 is arranged on the vehicle body, the middle gantry 2 is slidably arranged on the outer gantry 1, the inner gantry 3 is slidably arranged on the middle gantry 2, a front lifting assembly is arranged on the inner gantry 3 and is connected to the fork frame 9 through the front lifting assembly, and a fork 10 is arranged on the fork frame 9 for driving the fork 10 to lift and lower; a rear lifting assembly is arranged behind the outer gantry 1 and is connected to the middle gantry 2 and the inner gantry 3 through the rear lifting assembly for driving the middle gantry 2 and the inner gantry 3 to lift and lower; a cross beam is arranged on the lower side behind the outer gantry 1, and a three-way body weldment 13 and a speed limit valve 14 are arranged below the cross beam, which facilitates the welding of the three-way body weldment 13 and saves the time of welding and assembly. A high-pressure oil pipe 19 is arranged on the inner side of the cross beam close to the outer gantry 1 to prevent the high-pressure oil pipe 19 from being squeezed by the vehicle body. The three-way body weldment 13 communicates with the speed limit valve 14 and the high-pressure oil pipe 19.
[0022] In this embodiment, the front lifting assembly includes a middle cylinder 6, a middle chain 7, a triple pipeline one 11, a quadruple pipeline one 12, and a pipeline mounting base one 20. The middle cylinder 6 is arranged at the middle position of the inner gantry 3, making it more stable during operation. The movement direction of the output end of the middle cylinder 6 is vertically upward. A pipeline mounting base one 20 is arranged on the output end of the middle cylinder 6. One end of the chain of the middle cylinder 6 is connected to the inner gantry 3, and the other end is connected to the fork carriage 9. And the chain of the middle cylinder 6 slides around the side of the pipeline mounting base one 20. Preferably, a pulley is rotatably arranged on the side of the pipeline mounting base one 20, and the chain of the middle cylinder 6 is hung on the pulley, reducing the friction. The triple pipeline one 11 and the quadruple pipeline one 12 are respectively slidably arranged on the left and right sides of the pipeline mounting base one 20. After the triple pipeline one 11 and the quadruple pipeline one 12 are assembled, they do not affect the driver's line of sight, improving the driving safety.
[0023] In this embodiment, the rear lifting assembly includes side cylinders 5, side chains 4, a triple pipeline two 15, a quadruple pipeline two 16, a pipeline mounting base two 21, and a sprocket. The side cylinders 5 are arranged behind the outer gantry 1. Preferably, there are two side cylinders 5, which are respectively arranged on both sides behind the outer gantry 1, improving the lifting stability while leaving the field of vision in the middle of the gantry clear for the driver's observation. The movement direction of the output end of the side cylinders 5 is parallel to the movement direction of the output end of the middle cylinder 6. The output end of the side cylinders 5 is arranged on the middle gantry 2 and is used to drive the middle gantry 2 to lift and move. The sprocket is arranged on the rear of the middle gantry 2 through a wheel shaft. The side chain 4 is slidably hung on the sprocket, and one end of the side chain 4 is connected to the outer gantry 1, and the other end is connected to the inner gantry 3, and is used to drive the inner gantry 3 to lift and move when the middle gantry 2 lifts and moves. The pipeline mounting base two 21 is arranged behind the middle gantry 2. The triple pipeline two 15 and the quadruple pipeline two 16 are slidably hung on the pipeline mounting base two 21. And after the side chain 4, the triple pipeline two 15, and the quadruple pipeline two 16 are assembled, they do not block the driver's line of sight, improving the safety during use.
[0024] In this embodiment, it further includes a cargo retaining rack 8, which is arranged on the fork carriage 9 and behind the fork 10, and is used to increase the lateral support for the goods after picking up the goods on the shelf, avoiding the goods from tipping over and improving the practicality of the device.
[0025] In this embodiment, the outer gantry 1 is set as a C-shaped steel channel, and the middle gantry 2 and the inner gantry 3 are both set as J-shaped steel channels, which is convenient for assembly and connection, and while not affecting the strength of the gantry, it reduces the overall mass of the gantry, improving the economy of the device.
[0026] In this embodiment, the triple pipeline one 11 and the triple pipeline two 15 are connected by the transition joint one 17, and the quadruple pipeline one 12 and the quadruple pipeline two 16 are connected by the transition joint two 18. Both the transition joint one 17 and the transition joint two 18 are arranged on the inner gantry 3. The triple pipeline one 11, the triple pipeline two 15, the quadruple pipeline one 12, and the quadruple pipeline two 16 are all located between the cross beam and the fork frame 9, avoiding the possibility of extrusion damage to the pipelines when the gantry tilts backward, and improving the economy of the device.
[0027] Working principle: During use, the middle cylinder 6 and the side cylinder 5 are in the same oil circuit. The output end of the middle cylinder 6 extends first. The output end of the middle cylinder 6 drives the pipeline mounting seat one 20 to rise, causing the middle chain 7 to drive the fork frame 9 to rise relative to the inner gantry 3, thereby realizing the rise of the fork 10. At this time, the triple pipeline one 11 and the quadruple pipeline one 12 rise with the rise of the pipeline mounting seat one 20, and the pipelines will not entangle and block the driver's view; when the output end of the middle cylinder 6 is fully extended, the output end of the side cylinder 5 extends. The output end of the side cylinder 5 drives the middle gantry 2 to rise. The middle gantry 2 drives the pipeline mounting seat two 21 and the sprocket to move upward, causing the side chain 4 to drive the inner gantry 3 to rise accordingly. At this time, the triple pipeline two 15 and the quadruple pipeline two 16 slide with the rise of the middle gantry 2 and both move behind the side of the outer gantry 1, without affecting the driver's line of sight; and a cross beam is arranged at the bottom behind the outer gantry 1, and the pipelines of the triple pipeline one 11, the triple pipeline two 15, the quadruple pipeline one 12, and the quadruple pipeline two 16 are all arranged in front of the cross beam, avoiding the possibility of extrusion damage to the pipelines by the vehicle body.
[0028] The details not described in this utility model are all well-known conventional technical means in the art.
[0029] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this utility model.
[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "a plurality" means two or more unless otherwise specifically defined.
[0031] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
[0032] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent substitutions on some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A three-stage gantry structure is arranged on the front side of the vehicle body of a forklift, including an outer gantry (1), a middle gantry (2) and an inner gantry (3). The outer gantry (1) is arranged on the vehicle body, the middle gantry (2) is slidably arranged on the outer gantry (1), and the inner gantry (3) is slidably arranged on the middle gantry (2). It is characterized in that: A front lifting assembly is arranged on the inner gantry (3) and is connected to the fork carriage (9) through the front lifting assembly. A fork (10) is arranged on the fork carriage (9) for driving the fork (10) to lift; A rear lifting assembly is arranged behind the outer gantry (1) and is connected to the middle gantry (2) and the inner gantry (3) through the rear lifting assembly for driving the middle gantry (2) and the inner gantry (3) to lift; A cross beam is arranged behind the outer gantry (1). A three-way body weldment (13) and a speed limiting valve (14) are arranged below the cross beam. A high-pressure oil pipe (19) is arranged on the inner side of the cross beam close to the outer gantry (1). The three-way body weldment (13) communicates with the speed limiting valve (14) and the high-pressure oil pipe (19).
2. The three-stage gantry structure according to claim 1, characterized in that: The front lifting assembly includes a middle cylinder (6), a middle chain (7), a triple pipeline one (11), a quadruple pipeline one (12) and a pipeline mounting seat one (20). The middle cylinder (6) is arranged in the middle of the inner gantry (3). The movement direction of the output end of the middle cylinder (6) is vertically upward. A pipeline mounting seat one (20) is arranged at the output end of the middle cylinder (6). One end of the chain of the middle cylinder (6) is connected to the inner gantry (3), and the other end is connected to the fork carriage (9). And the chain of the middle cylinder (6) slides around the side of the pipeline mounting seat one (20). The triple pipeline one (11) and the quadruple pipeline one (12) are respectively slidably arranged on the left and right sides of the pipeline mounting seat one (20).
3. A three-stage gantry structure according to claim 2, characterized in that: The rear lifting assembly includes a side cylinder (5), a side chain (4), a triple pipeline two (15), a quadruple pipeline two (16), a pipeline mounting seat two (21) and a sprocket. The side cylinder (5) is arranged behind the outer gantry (1). The movement direction of the output end of the side cylinder (5) is parallel to the movement direction of the output end of the middle cylinder (6). The output end of the side cylinder (5) is arranged on the middle gantry (2) for driving the middle gantry (2) to lift and move. The sprocket is arranged at the rear on the middle gantry (2) through a wheel shaft. The side chain (4) is slidably hung on the sprocket. And one end of the side chain (4) is connected to the outer gantry (1), and the other end is connected to the inner gantry (3) for driving the inner gantry (3) to lift and move when the middle gantry (2) lifts and moves. The pipeline mounting seat two (21) is arranged behind the middle gantry (2). The triple pipeline two (15) and the quadruple pipeline two (16) are slidably hung on the pipeline mounting seat two (21).
4. The three-stage gantry structure according to claim 3, wherein: It further includes a cargo retaining rack (8) arranged on the fork carriage (9) and located behind the fork (10).
5. A three-stage gantry structure according to claim 4, characterized in that: The outer gantry (1) is set as a C-shaped steel channel, and the middle gantry (2) and the inner gantry (3) are both set as J-shaped steel channels.
6. A three-stage gantry structure according to claim 5, characterized in that: The triple pipeline one (11) and the triple pipeline two (15) are connected through the first transition joint (17), the quadruple pipeline one (12) and the quadruple pipeline two (16) are connected through the second transition joint (18), and both the first transition joint (17) and the second transition joint (18) are arranged on the inner gantry (3). The triple pipeline one (11), the triple pipeline two (15), the quadruple pipeline one (12) and the quadruple pipeline two (16) are all located at the position between the cross beam and the fork frame (9).