Forklift hidden hose arrangement and forklift

Abstract

The utility model discloses a kind of forklift hidden type rubber pipe arrangement structure and forklift, belong to forklift gantry hydraulic pipeline arrangement technical field.The structure includes outer gantry, middle gantry, inner gantry, sprocket shaft, sprocket, chain and rubber pipe, it is characterized by being provided with by inner baffle, outer baffle, sprocket pressing plate and rubber pipe guard plate and form the superposition limit combination, by bolt connection axial clamping fixed rubber pipe, make it with chain in gantry channel steel concealed movement.Simultaneously, rubber pipe upper and lower portion is fixed by pipe clamp and double-slot guide pipe clamp respectively, ensure movement reliability.The utility model effectively solves the problem that traditional rubber pipe arrangement shields driver's field of view, significantly improves the safety and visibility of forklift operation, especially applicable to high field of view requirement scene such as three-stage gantry.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic pipeline layout technology of forklift mast, and particularly relates to a concealed arrangement structure in which the attachment hose moves with the chain inside the mast and is limited and protected in the sprocket area. Background Technology

[0002] Forklift visibility is a key indicator for evaluating overall vehicle performance and is receiving increasing attention from users and manufacturers. This is especially true in three-stage fully free mast forklifts, where the mast structure is complex and components are densely packed, leaving the driver with severely limited visibility as they can only observe the work area through the narrow gap between the inner mast and the front cylinder.

[0003] In existing technologies, hydraulic hoses for attachments are often independently arranged on the outside or front of the mast, further obstructing the view and even causing problems with backing up due to insufficient visibility. Although there have been attempts to combine the hoses with the chain, such as the concealed forklift attachment oil supply line disclosed in Chinese Utility Model Patent Publication No. CN211419494U, the fixing method is still crude, and the hoses are prone to falling off, wearing out, or becoming unstable during movement, failing to fundamentally achieve a balance between optimizing visibility and improving reliability.

[0004] Therefore, there is an urgent need for a hose arrangement scheme that is compact, reliable, and completely hidden inside the gantry. Utility Model Content

[0005] The technical problem this invention aims to solve is that existing solutions for using rubber hoses to avoid obstructing the view by moving with a chain are prone to hose detachment, wear, and insufficient reliability. The specific technical solution is as follows: This utility model provides a concealed hose arrangement structure for forklifts, including: an outer mast, a middle mast, and an inner mast; The sprocket shaft, the sprocket that rotates with the sprocket shaft, and the chain wound around the sprocket are all fixedly installed at the crossbeam assembly on the middle gantry. Rubber hoses laid along the length of the chain; And a hose limiting and protection assembly provided in the area adjacent to the sprocket and chain, the assembly including a hose baffle assembly, a sprocket pressure plate and a hose guard plate; The hose baffle assembly includes an inner baffle and an outer baffle; The inner baffle is axially constrained between the locating surface of the sprocket shaft and the sprocket; The outer baffle abuts against the outer end face of the sprocket. The sprocket pressure plate and the hose guard plate are connected in series by the same bolt, and the sprocket pressure plate is fixed to the end face of the sprocket shaft by the bolt, applying axial pressing force to the outer baffle. The hose guard plate is fixed to the outside of the sprocket pressure plate. The hose guard plate has a stop bar extending parallel to the sprocket shaft on the side facing the sprocket.

[0006] In one embodiment, the sprocket shaft and the upper crossbeam assembly of the middle gantry are welded together.

[0007] In one embodiment, the rear end of the chain is connected to the lower end face of the outer gantry chain plate via a nut, and the front end of the chain is connected to the lower end face of the inner gantry chain plate via a nut.

[0008] In one embodiment, the upper part of the hose is detachably connected to the front end face of the reinforcing side plate of the upper crossbeam of the outer gantry via a hose clamp.

[0009] In one embodiment, the lower part of the hose is detachably connected to the front end face of the hose fixing plate of the inner gantry via a double-groove guide tube clamp.

[0010] In one embodiment, the dual-groove guide clamp has two parallel grooves, the openings of which are oriented toward the center plane of the chain.

[0011] In one embodiment, the rear cylinder is driven to the middle mast to drive the middle mast to rise and fall, and the chain moves vertically along with the rise and fall of the middle mast.

[0012] The present invention also provides a forklift including the above-described concealed hose arrangement structure.

[0013] This invention, by arranging the hose along the chain and fixing it using a stacked limiting combination, not only completely conceals the hose within the gantry channel steel, eliminating any obstruction to the driver's view, but also significantly improves the hose's resistance to detachment and wear under high-speed lifting and heavy-load conditions through the axial clamping design of the inner and outer baffles, sprocket pressure plate, and hose guard plate. Simultaneously, the directional installation of the double-groove guide clamp further ensures the stability of the hose's movement trajectory, thereby enhancing the overall reliability of the system.

[0014] In addition, all components are bolted together, resulting in a simple and compact structure that is easy to assemble, disassemble, and maintain. This provides a practical solution for three-stage mast forklifts with high visibility requirements, combining safety, practicality, and economy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial enlarged view of the hose limiting and protection component in the sprocket area of ​​this utility model; Figure 3 This is a schematic diagram showing the assembly position relationship of the pipe clamps of this utility model; Figure 4 This is a schematic diagram showing the assembly position relationship of the double-groove guide tube clamp of this utility model; Figure 5 This is a schematic diagram of the pipe clamp structure of this utility model; Figure 6 This is a cross-sectional view of the inner baffle and outer baffle of the tube of this utility model; In the diagram: 11. Upper crossbeam assembly of the middle mast; 12. Hose; 13. Chain; 14. Hose baffle assembly; 141. Inner baffle; 142. Outer baffle; 15. Sprocket; 16. Hose guard plate; 17. Sprocket pressure plate; 18. Outer mast chain hanger plate; 21. Sprocket shaft; 31. Reinforcing side plate of the upper crossbeam of the outer mast; 32. Hose clamp; 33. Middle mast; 34. Outer mast; 35. Inner mast; 41. Double groove guide hose clamp; 101. Inner mast chain hanger plate; 102. Rear cylinder. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a concealed hose arrangement structure for forklifts. The structure mainly includes a mast system composed of an outer mast 34, a middle mast 33, and an inner mast 35. A middle mast upper crossbeam assembly 11 is fixedly mounted on the middle mast 33. A sprocket shaft 21 is firmly connected to the middle mast upper crossbeam assembly 11 by welding to form a welded structure. This connection method ensures the stability and load-bearing capacity of the sprocket shaft 21. A sprocket 15 forms a rotational engagement with the sprocket shaft 21 through bearings or bushings. A chain 13 is wound around the sprocket 15 to form a complete power transmission system. The hose 12 is arranged along the length of the chain 13 and runs parallel to it, allowing it to move synchronously with the chain 13 during mast lifting.

[0018] A dedicated hose limiting and protection assembly is provided in the area adjacent to the sprocket 15 and the chain 13. This assembly consists of a hose baffle assembly, a sprocket pressure plate 17, and a hose guard plate 16, forming a complete protection system. The hose baffle assembly further includes an inner baffle 141 and an outer baffle 142. The inner baffle 141 is confined between the sprocket 15 and the end positioning surface of the sprocket shaft 21, while the outer baffle 142 is fixed to one end of the sprocket shaft 21. In this way, the inner baffle 141 and the outer baffle 142 utilize the structural advantage that their radii are greater than the sum of the radius of the sprocket 15, the thickness of the chain 13, and the diameter of the hose 12 to form a hose 12 limiting space with a certain depth outside the chain 13. This prevents the hose 12 from detaching from the surface of the chain 13 in the axial direction of the sprocket 15 through the limiting effect of the inner baffle 141 and the outer baffle 142.

[0019] The sprocket pressure plate 17 and the hose guard plate 16 are connected in series by the same high-strength bolt. This high-strength bolt is coaxially inserted into one end of the sprocket shaft 21 and tightened, fixing the sprocket pressure plate 17 to the outer end face of the sprocket shaft 21. Figure 2 As shown, the sprocket pressure plate 17 is a stepped shaft shape, and the outer baffle 142 is sleeved on one end of the sprocket pressure plate 17. Therefore, during the tightening process of the sprocket pressure plate 17, a uniform axial pressing force will be applied to the outer baffle 142 sleeved on its outer periphery to ensure that the outer baffle 142 and the end face of the sprocket 15 maintain stable contact. Since the inner baffle 141 and the outer baffle 142 are respectively clamped on both sides of the sprocket 15, and the sprocket 15 is constantly rotating, wear will inevitably occur. To overcome this problem, alternatively, on the one hand, wear-resistant materials can be selected to make the inner baffle 141 and the outer baffle 142, specifically nylon; on the other hand, referring to... Figure 6 The inner baffle 141 and the outer baffle 142 can be made into stepped rings with the same shape and specifications, with the center slightly higher than the edge. During installation, the central through hole facilitates the fitting of the baffle onto the sprocket shaft 21 and the sprocket pressure plate 17, enabling the baffle to be quickly and coaxially installed. Only the stepped boss at the central through hole can directly contact the two sides of the sprocket 15. Therefore, compared to the entire baffle surface contacting the sprocket 15, the contact area between the baffle and the sprocket 15 is reduced, further reducing wear and ensuring the normal use of the equipment for a long time.

[0020] In addition, such as Figure 4 As shown, the hose guard plate 16 will also be fixed to the outside of the sprocket pressure plate 17. At this time, the stop bar extending parallel to the sprocket shaft 21 on the inner side of the hose guard plate 16 will be suspended above the limiting space formed by the inner baffle 141 and the outer baffle 142, limiting the hose 12 from the radial direction of the sprocket 15, thus forming multiple protections for the hose 12.

[0021] The rear end of chain 13 is adjustablely connected to the lower end face of the outer gantry chain plate 18 via a nut, and the front end is connected to the lower end face of the inner gantry chain plate 101 in the same way. This connection method facilitates the adjustment and maintenance of chain 13 tension. The upper part of hose 12 is detachably connected to the front end face of the reinforcing side plate 31 of the upper crossbeam of the outer gantry via hose clamp 32. The hose clamp 32 adopts an open design for easy installation and replacement. The lower part of hose 12 is connected to the front end face of the hose fixing plate of the inner gantry 35 via a double-groove guide hose clamp 41. This connection method ensures both reliable fixation and easy disassembly and maintenance. The double-groove guide hose clamp 41 is made of engineering plastic or metal and has two parallel hose grooves. The opening direction of these two hose grooves is specially designed to always face the center plane of chain 13, ensuring that hose 12 maintains an ideal posture during movement. The rear cylinder 102 and the middle mast 33 are connected by a pin to form a transmission mechanism. When the rear cylinder 102 is activated, it drives the middle mast 33 to move up and down. The chain 13 moves vertically along with the middle mast 33 as it moves up and down. The hose 12 moves synchronously under the constraint of the limiting and protective components and is always hidden inside the mast.

[0022] During the installation process, the sprocket shaft 21 is first fixed to the designated position of the upper crossbeam assembly 11 of the middle gantry by welding. The welding process must ensure that the perpendicularity error between the sprocket shaft 21 and the gantry plane does not exceed 0.1 mm. Then, the sprocket 15 is assembled onto the sprocket shaft 21 using bearings, ensuring that the sprocket 15 rotates freely without jamming. When installing the inner baffle 141, its end face must be in contact with the end positioning surface of the sprocket shaft 21. Next, the outer baffle 142 is installed, allowing it to flatly abut against the outer end face of the sprocket 15. The sprocket pressure plate 17 and the hose protector 16 are sequentially connected using the same high-strength bolt, and then the bolt is tightened. Simultaneously, the sprocket pressure plate 17 is fixed to the outer end face of the sprocket shaft 21, and the hose protector 16 is fixed to the outside of the sprocket pressure plate 17. When tightening the bolts, a torque wrench is used to control the torque within the range of 40 N·m to 60 N·m to ensure appropriate tightening force. Anti-loosening washers must be installed at all bolt connections. The installation of chain 13 requires ensuring proper engagement with sprocket 15. Both ends of chain 13 are fixed to the outer gantry chain plate 18 and the inner gantry chain plate 101 respectively using adjusting nuts. The tension of the chain can be adjusted using these nuts. After the hose 12 is arranged along chain 13, its upper part is fixed by hose clamp 32, and its lower part is fixed by double-groove guide hose clamp 41. The installation angle of the double-groove guide hose clamp 41 needs to be precisely adjusted so that the openings of its parallel hose grooves face the center plane of chain 13.

[0023] Therefore, the inner baffle 141 is pressed against the end face of the sprocket shaft 21 as a reference, the outer baffle 142 presses against the outer end face of the sprocket 15, and is then bolted to the sprocket shaft 21 by the sprocket pressure plate 17, and connected to the hose guard plate 16, together forming a stacked limiting combination. The axial clamping force generated firmly restricts the hose 12 within the limiting space on the side of the sprocket 15, effectively preventing it from moving axially along the sprocket 15. The stop bar can prevent the hose 12 from moving radially along the sprocket 15; at the same time, it is installed on the inner gantry 3 The double-groove guide tube clamp 41 on the 5 has its opening facing the center plane of the chain 13. It wraps around and constrains the hose 12 laterally, precisely guiding its movement trajectory and suppressing lateral swaying and displacement. Finally, the upper end of the hose 12 is fixed to the outer gantry reinforcing side plate 31 by the tube clamp 32, the lower end is fixed by the double-groove guide tube clamp 41, and the middle part remains parallel to the chain 13 and moves up and down synchronously with it, eliminating the risk of falling off due to relative displacement or friction, thereby ensuring the reliability of the hose operation in multiple directions.

[0024] This embodiment achieves a completely concealed arrangement of the hose within the mast system through the aforementioned specific structure. The hose moves synchronously with the chain and is reliably fixed, completely solving the problem of obstructing the driver's view caused by traditional arrangements. The unique stacking and limiting combination design, through a multi-layer pressure plate structure, ensures the stability of the hose under high-speed lifting and heavy-load conditions, significantly reducing the risk of detachment and wear. The entire system has a compact and reasonable structure, is easy to install and maintain, and provides a reliable solution for forklift operations with high visibility requirements.

[0025] Based on this, the present invention also provides a forklift that includes the aforementioned concealed hose arrangement structure. Of course, the forklift also includes a chassis, hydraulic system, and operating control system, but since these are not related to the inventive point, they will not be described in detail here.

Claims

1. A forklift concealed hose arrangement structure, characterized in that, include: Outer gantry (34), middle gantry (33) and inner gantry (35); A sprocket shaft (21) fixedly installed on the crossbeam assembly (11) of the middle gantry, a sprocket (15) rotatably engaged with the sprocket shaft (21), and a chain (13) wound around the sprocket (15); A rubber tube (12) is laid along the length of the chain (13); And a hose limiting and protection assembly provided in the area adjacent to the sprocket (15) and the chain (13), the assembly including a hose baffle assembly, a sprocket pressure plate (17) and a hose guard plate (16); The hose baffle assembly includes an inner baffle (141) and an outer baffle (142); The inner baffle (141) is axially constrained between the positioning surface of the sprocket shaft (21) and the sprocket (15); The outer baffle (142) abuts against the outer end face of the sprocket (15). The sprocket pressure plate (17) and the hose guard plate (16) are connected in series by the same bolt, and the sprocket pressure plate (17) is fixed to the end face of the sprocket shaft (21) by the bolt, and an axial pressing force is applied to the outer baffle (142); the hose guard plate (16) is fixed to the outside of the sprocket pressure plate (17); The hose guard plate (16) has a stop bar extending parallel to the sprocket shaft (21) on the side facing the sprocket (15).

2. The forklift concealed hose arrangement structure according to claim 1, characterized in that: The sprocket shaft (21) and the upper crossbeam assembly (11) of the middle gantry are welded together.

3. The forklift concealed hose arrangement structure according to claim 1, characterized in that: The rear end of the chain (13) is connected to the lower end face of the outer gantry chain plate (18) by a nut, and the front end of the chain (13) is connected to the lower end face of the inner gantry chain plate (101) by a nut.

4. The forklift concealed hose arrangement structure according to claim 1, characterized in that: The upper part of the hose (12) is detachably connected to the front end face of the reinforcing side plate (31) of the upper crossbeam of the outer frame via a hose clamp (32).

5. The forklift concealed hose arrangement structure according to claim 1, characterized in that: The lower part of the hose (12) is detachably connected to the front end face of the hose fixing plate of the inner frame (35) via a double-groove guide tube clamp (41).

6. The forklift concealed hose arrangement structure according to claim 5, characterized in that: The double-groove guide tube clamp (41) has two parallel tube grooves, and the openings of the two parallel tube grooves are set towards the center plane of the chain (13).

7. The forklift concealed hose arrangement structure according to claim 1, characterized in that: The rear cylinder (102) is connected to the middle mast (33) to drive the middle mast (33) to rise and fall, and the chain (13) moves vertically along with the rise and fall of the middle mast (33).

8. A forklift, characterized in that, Includes the concealed hose arrangement structure as described in any one of claims 1 to 7.

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