Three-stage four-lift cylinder gantry

Abstract

The application relates to a three-stage four-lifting oil cylinder gantry and relates to the technical field of forks, which comprises an outer gantry and an inner gantry slidingly connected to the inner wall of the outer gantry. The second hydraulic cylinder body is installed on the outer side of the inner gantry through a connecting plate and a supporting plate, and the first hydraulic cylinder body is installed on the two sides of the outer gantry, thereby completely avoiding the inner side of the inner gantry from the working visual field area, solving the problem of the inside of the cylinder body in the prior art blocking the visual field, fixing the second hydraulic cylinder body through the reinforced arc-shaped plate, the first connecting block, the second connecting block and the connecting bolt, reinforcing the connection between the supporting plate and the connecting plate through the reinforcing rib, avoiding the structural looseness caused by the external placement of the cylinder body, solving the defect that the existing dispersedly arranged cylinder body is easy to lose balance, wrapping the second hydraulic cylinder body through a U-shaped protective cover, protecting the interface through the interface protective sleeve and the rubber sleeve, making up for the deficiency of the lack of system protection on the outside of the cylinder body in the prior art, and driving the first sprocket and the first chain through the first sprocket connector.

Description

Technical Field

[0001] This application relates to the field of forklift technology, and in particular to a three-stage four-lift hydraulic cylinder mast. Background Technology

[0002] As a core component of forklifts, the design of the forklift mast directly affects the operator's visibility and operational efficiency. Traditional forklift masts typically place the hydraulic cylinders inside the mast to achieve a compact structural design. However, with the increasing demands for operational efficiency and safety in the logistics industry, the limitation of the operator's field of vision has gradually become a key factor restricting forklift performance.

[0003] The main drawback of existing technologies lies in the limited field of vision caused by the cylinder arrangement. Specifically, when the cylinders are concentrated on the inner side, the operator's view in front is completely blocked, making it impossible to clearly observe the goods and the surrounding environment; when the cylinders are distributed, the improvement in field of vision is limited, and new structural instability factors may be introduced. In addition, existing technologies lack a systematic solution for arranging cylinders on the outer side, making it difficult to balance a wide field of vision with structural stability. Utility Model Content

[0004] The purpose of this application is to provide a three-stage, four-lift hydraulic cylinder mast that has the advantages of wide field of vision and structural stability, thus solving the problems mentioned in the background art.

[0005] The technical solution of the three-stage four-lifting hydraulic cylinder gantry provided in this application is as follows: A three-stage four-lifting hydraulic cylinder gantry includes an outer gantry and an inner gantry slidably connected to the inner wall of the outer gantry. A fork body is slidably connected to the inner wall of the inner gantry. A first hydraulic cylinder is installed on both sides of the outer surface of the outer gantry. Two symmetrical connecting plates are fixedly connected to the outer surface of the inner gantry. A support plate is fixedly connected to the outer surface of each connecting plate. A second hydraulic cylinder is installed on the upper surface of each support plate. A second sprocket connector is fixedly connected to the top of each second hydraulic cylinder. A rotatable second sprocket is installed on the inner wall of each second sprocket connector. A second chain is engaged on the outer surface of each second sprocket.

[0006] Each of the second hydraulic cylinders is fixedly connected to the top of a first connecting block. The outer surface of the inner gantry is fixedly connected to two symmetrical reinforcing arc plates. Each of the second hydraulic cylinders is equipped with a U-shaped protective cover. Each of the U-shaped protective covers is fixedly connected to the top of a second connecting block. Each of the second connecting blocks is equipped with a connecting bolt. The first connecting block, the reinforcing arc plate, and the second connecting block are fixedly connected by the connecting bolt. Two interface protective sleeves are installed on the side of the two U-shaped protective covers that are close to each other.

[0007] By adopting the above technical solution, the second hydraulic cylinder is arranged on the outside of the inner mast through connecting plates and support plates, while the first hydraulic cylinder is installed on both sides of the outer mast. This completely avoids the cylinder occupying the inner space of the inner mast, solving the problem of the cylinder obstructing the operator's forward view in the prior art. This allows the operator to clearly observe the goods and the surrounding environment. At the same time, the reinforcement of the arc plate, together with the fixing structure of the first connecting block, the second connecting block and the connecting bolts, provides stable support for the second hydraulic cylinder, avoiding structural instability caused by the external placement of the cylinder. Furthermore, the U-shaped protective cover can form a protective enclosure for the second hydraulic cylinder, reducing the impact of external debris on the cylinder and making up for the deficiency of the lack of systematic protection on the outside of the cylinder in the prior art.

[0008] Preferably, two symmetrical fork bodies are mounted on the outer surface of the fork carriage body, and a spring pin is installed at the top of each fork body, with the bottom end of the spring pin inserted into the inner wall of the fork carriage body.

[0009] By adopting the above technical solution and using the spring pin insertion and fixing method, the fork body and fork carriage body can be quickly disassembled and assembled, improving the convenience of fork body replacement, adapting to the handling needs of goods of different sizes, and further optimizing operational flexibility.

[0010] Preferably, a backrest is fixedly connected to the outer surface of the fork body.

[0011] By adopting the above technical solution, the backrest can provide rearward obstruction to the goods carried on the forklift body without obstructing the operator's forward view, thus preventing the goods from falling due to inertia during forklift operation and ensuring the safety of goods handling.

[0012] Preferably, a first sprocket connector is fixedly connected to the top of each of the first hydraulic cylinders, a first sprocket is mounted on the outer surface of each of the first sprocket connectors, and a first chain is engaged with the outside of each of the first sprockets (9).

[0013] By adopting the above technical solution, the two first hydraulic cylinders drive the two first sprockets to move synchronously through the first sprocket connector, so that the power can be evenly transmitted to the first chains on both sides. This avoids the problem of uneven force and tilting of the inner gantry caused by traditional single-sided transmission, strengthens the structural stability of the gantry during lifting, and solves the defect of the existing technology where the cylinders are distributed and are prone to imbalance.

[0014] Preferably, the two ends of the two first chains are fixedly connected to the outer surfaces of the outer gantry and the inner gantry, respectively.

[0015] By adopting the above technical solution, the extension and retraction power of the first hydraulic cylinder can be accurately transmitted to the inner mast, making it more practical.

[0016] Preferably, a positioning block is fixedly connected to the outer surface of each of the second hydraulic cylinders, and the two ends of the two second chains are fixedly connected to the outer surfaces of the fork body and the positioning block, respectively.

[0017] By adopting the above technical solution, the positioning block provides a stable fixed base point for the second chain, so that the power energy of the second hydraulic cylinder can be accurately transmitted to the fork body through the second chain, realizing the coordinated drive of the second hydraulic cylinder and the first hydraulic cylinder. At the same time, the connection structure is simple and does not require complex modification, taking into account both structural stability and ease of assembly.

[0018] Preferably, a rubber sleeve is fixedly connected to the inner wall of each of the interface protective sleeves.

[0019] By adopting the above technical solution, the interface protective sleeve and the rubber sleeve form a double protection, which can not only block external impacts, but also reduce the impact of forklift operation vibration on the interface through the elastic buffering effect of the rubber sleeve. It supplements the detailed protection of the U-shaped protective cover in addition to the protection of the second hydraulic cylinder, and extends the service life of the equipment.

[0020] Preferably, each of the support plates has a reinforcing rib welded to its bottom surface, and the other side of each of the two reinforcing ribs is welded to the outer surface of the two connecting plates respectively.

[0021] By adopting the above technical solution, the reinforcing ribs are welded between the support plate and the connecting plate to form a stable support structure, which greatly enhances the load-bearing capacity of the support plate for the second hydraulic cylinder, avoids deformation or breakage of the support plate due to the stress on the second hydraulic cylinder during operation, and the welding connection method is reliable, without the need to add additional complex connecting parts, thus taking into account both structural strength and practicality.

[0022] In summary, this application includes at least one of the following beneficial technical effects: This three-stage, four-lift hydraulic cylinder mast mount has the second hydraulic cylinder mounted on the outside of the inner mast via a connecting plate and a support plate, while the first hydraulic cylinder is mounted on both sides of the outer mast. This completely avoids the working field of view inside the inner mast, solving the problem of obstructed vision caused by the inner placement of cylinders in existing technologies. The second hydraulic cylinder is fixed by a reinforced arc plate in conjunction with a first connecting block, a second connecting block, and connecting bolts. The connection between the support plate and the connecting plate is further reinforced with reinforcing ribs to prevent structural loosening caused by the external placement of cylinders, thus addressing the deficiency of imbalance caused by the dispersed placement of cylinders in existing technologies. The second hydraulic cylinder is wrapped with a U-shaped protective cover, and the interface is protected by a rubber sleeve, compensating for the lack of external system protection for cylinders in existing technologies. At the same time, the first hydraulic cylinder drives the first sprocket and the first chain via a first sprocket connector, and the second hydraulic cylinder drives the second sprocket and the second chain via a second sprocket connector and is positioned by a positioning block. This enables the first and second hydraulic cylinders to work together to drive the fork body, further improving the stability of fork lifting. The overall solution specifically addresses the pain points of existing technologies, taking into account both open field of view, structural stability, and reliable protection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall front view structure of this application; Figure 2 This is a schematic diagram of the overall rear view structure of this application; Figure 3 This is a schematic diagram of the overall top view of the structure of this application; Figure 4 This is a schematic diagram of the overall rear view structure of this application; Figure 5 This is a partial structural diagram of this application.

[0024] In the picture: 1. Outer mast; 2. Inner mast; 3. Fork carriage body; 4. Fork body; 5. Spring pin; 6. Stopper; 7. First hydraulic cylinder; 8. First sprocket connector; 9. First sprocket; 10. First chain; 11. Connecting plate; 12. Support plate; 13. Second hydraulic cylinder; 14. Second sprocket; 15. Second chain; 16. Positioning block; 17. First connecting block; 18. Reinforcing arc plate; 19. U-shaped protective cover; 20. Second connecting block; 21. Connecting bolt; 22. Interface protective sleeve; 23. Rubber sleeve; 24. Reinforcing rib; 25. Second sprocket connector. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0026] Example 1: A three-stage, four-lift hydraulic cylinder gantry, referring to... Figure 1 , Figure 2 and Figure 3 The system includes an outer mast 1 and an inner mast 2 slidably connected to the inner wall of the outer mast 1. A fork body 3 is slidably connected to the inner wall of the inner mast 2. First hydraulic cylinders 7 are installed on both sides of the outer surface of the outer mast 1. Two symmetrical connecting plates 11 are fixedly connected to the outer surface of the inner mast 2. A support plate 12 is fixedly connected to the outer surface of each connecting plate 11. A second hydraulic cylinder 13 is installed on the upper surface of each support plate 12. A second sprocket connector 25 is fixedly connected to the top of each second hydraulic cylinder 13. A rotatable second sprocket 14 is installed on the inner wall of each second sprocket connector 25. Each second sprocket 14 has a second chain 15 meshing on its outer surface, and each second hydraulic cylinder 13 has a positioning block 16 fixedly connected to its outer surface. The two ends of the two second chains 15 are fixedly connected to the outer surfaces of the fork body 3 and the positioning block 16, respectively. The positioning block 16 provides a stable fixed base point for the second chains 15, so that the power of the second hydraulic cylinder 13 can be accurately transmitted to the fork body 3 through the second chain 15, realizing the coordinated drive of the second hydraulic cylinder 13 and the first hydraulic cylinder 7. At the same time, the connection structure is simple and does not require complex modification, taking into account both structural stability and ease of assembly.

[0027] Reference Figure 2 , Figure 4 and Figure 5 Each second hydraulic cylinder 13 has a first connecting block 17 fixedly connected to its top. Two symmetrical reinforcing arc-shaped plates 18 are fixedly connected to the outer surface of the inner gantry 2. Each second hydraulic cylinder 13 has a U-shaped protective cover 19 installed on its exterior. Each U-shaped protective cover 19 has a second connecting block 20 fixedly connected to its top. Each second connecting block 20 has a connecting bolt 21 installed inside. The first connecting block 17, the reinforcing arc-shaped plate 18, and the second connecting block 20 are fixedly connected by the connecting bolts 21. Two interface protective sleeves 22 are installed on the side of each U-shaped protective cover 19 that is close to each other. Each first hydraulic cylinder 7 has a first sprocket connector 8 fixedly connected to its top. Each first sprocket connector 8... Each outer surface is equipped with a first sprocket 9, and a first chain 10 is engaged with the outside of each first sprocket 9. The two first hydraulic cylinders 7 drive the two first sprockets 9 to move synchronously through the first sprocket connector 8, so that the power can be evenly transmitted to the first chains 10 on both sides. This avoids the problem of uneven force and tilting of the inner gantry 2 caused by traditional single-sided transmission, and enhances the structural stability during the lifting process of the gantry. It forms a balanced power support in the center and on both sides with the second hydraulic cylinder 13, solving the defect of the dispersed cylinder arrangement in the existing technology that is prone to imbalance. The two ends of the two first chains 10 are fixedly connected to the outer surfaces of the outer gantry 1 and the inner gantry 2, respectively, so that the extension and retraction power of the first hydraulic cylinder 7 can be accurately transmitted to the inner gantry 2, making it more practical.

[0028] Example 2: A three-stage four-lift hydraulic cylinder gantry, referring to... Figure 1 , Figure 2 and Figure 3 Based on the same concept as Embodiment 1 above, this embodiment proposes to install two symmetrical fork bodies 4 on the outer surface of the fork carriage body 3. Each fork body 4 has a spring pin 5 installed at its top, and the bottom end of the spring pin 5 is inserted into the inner wall of the fork carriage body 3. By using the insertion and fixing method of the spring pin 5, the fork body 4 and the fork carriage body 3 can be quickly disassembled and assembled, improving the convenience of replacing the fork body 4, adapting to the handling needs of goods of different sizes, and further optimizing the flexibility of operation. A backrest 6 is fixedly connected to the outer surface of the fork carriage body 3. Without obstructing the operator's forward view, the backrest 6 can form a rearward block for the goods carried on the fork carriage body 3, preventing the goods from falling backward due to inertia during forklift operation and ensuring the safety of goods handling.

[0029] Reference Figure 2 , Figure 4 and Figure 5 Each interface protective sleeve 22 has a rubber sleeve 23 fixedly connected to its inner wall. The interface protective sleeve 22 and the rubber sleeve 23 form a double protection, which can not only block external impacts, but also reduce the impact of forklift operation vibration on the interface through the elastic buffering effect of the rubber sleeve 23. This supplements the detailed protection of the second hydraulic cylinder 13 provided by the U-shaped protective cover 19, and extends the service life of the equipment. Each support plate 12 has a reinforcing rib 24 welded to its bottom surface. The other side of the two reinforcing ribs 24 is welded to the outer surface of the two connecting plates 11 respectively. The reinforcing ribs 24 form a stable support structure by welding between the support plate 12 and the connecting plate 11, which greatly enhances the load-bearing capacity of the support plate 12 on the second hydraulic cylinder 13. This prevents the support plate 12 from deforming or breaking due to the force of the second hydraulic cylinder 13 during operation. Moreover, the welding connection method is reliable and does not require additional complex connecting parts, thus balancing structural strength and practicality.

[0030] The implementation principle of this application embodiment is as follows: the outer mast 1 serves as a fixed base, the inner mast 2 can slide along the inner wall of the outer mast 1 to adjust the overall working height, and the fork body 3 relies on the inner wall of the inner mast 2 to achieve lifting and lowering. When the equipment is started, the second hydraulic cylinders 13 on both sides start synchronously, and the second sprocket connector 25 at the top of the cylinder drives the second sprocket 14 installed on the inner wall to rotate. The second sprocket 14 meshes with the second chain 15, which is positioned by the positioning block 16. Both ends are also connected to the fork body 3, thereby assisting in pulling the fork body 3, realizing the coordinated drive of the first hydraulic cylinder 7 and the second hydraulic cylinder 13, and ensuring that the lifting and lowering of the fork body 3 is stable. In addition, the first hydraulic cylinder 7 can obtain power and extend and retract through the external hydraulic system, and the first sprocket connector 8 at its top will move together, thereby driving the first sprockets 9 installed on both sides to rotate. The first sprockets 9 and the first chain 10 The components mesh with each other, and the two ends of the first chain 10 are fixed to the outer mast 1 and the inner mast 2 respectively. Therefore, the rotation of the first sprocket 9 will be converted into the pulling action of the first chain 10, which will drive the inner mast 2 to move along the inner wall of the outer mast 1, thereby further driving the fork body 3 to move. During operation, the U-shaped protective cover 19 always wraps around the second hydraulic cylinder 13 to avoid impact from external debris. The interface protective sleeve 22 works with the rubber sleeve 23 to protect the hydraulic interface. The fork body 4 is fixed to the fork body 3 by the spring pin 5 to carry the goods. The backrest 6 prevents the goods from tilting backward. The reinforcing arc plate 18 and the reinforcing rib 24 ensure the stable connection of each component, forming a continuous and reliable operation process.

Claims

1. A three-stage four-lift hydraulic cylinder mast, comprising an outer mast (1) and an inner mast (2) slidably connected to the inner wall of the outer mast (1), characterized in that: The inner wall of the inner mast (2) is slidably connected to the fork body (3). The outer surface of the outer mast (1) is equipped with a first hydraulic cylinder (7) on both sides. The outer surface of the inner mast (2) is fixedly connected to two symmetrical connecting plates (11). The outer surface of each connecting plate (11) is fixedly connected to a support plate (12). The upper surface of each support plate (12) is equipped with a second hydraulic cylinder (13). The top of each second hydraulic cylinder (13) is fixedly connected to a second sprocket connector (25). The inner wall of each second sprocket connector (25) is equipped with a rotatable second sprocket (14). The outer surface of each second sprocket (14) is engaged with a second chain (15). Each of the second hydraulic cylinder bodies (13) is fixedly connected to a first connecting block (17) at its top. The outer surface of the inner gantry (2) is fixedly connected to two symmetrical reinforcing arc plates (18). Each of the second hydraulic cylinder bodies (13) is equipped with a U-shaped protective cover (19) on its exterior. Each of the U-shaped protective covers (19) is fixedly connected to a second connecting block (20) at its top. Each of the second connecting blocks (20) is equipped with a connecting bolt (21) inside its interior. The first connecting block (17), the reinforcing arc plate (18), and the second connecting block (20) are fixedly connected by the connecting bolt (21). Two interface protective sleeves (22) are installed on the side of the two U-shaped protective covers (19) that are close to each other.

2. The three-stage four-lift hydraulic cylinder gantry according to claim 1, characterized in that: Two symmetrical fork bodies (4) are mounted on the outer surface of the fork carriage body (3). Each fork body (4) has a spring pin (5) at its top end, and the bottom end of the spring pin (5) is inserted into the inner wall of the fork carriage body (3).

3. The three-stage four-lift hydraulic cylinder gantry according to claim 1, characterized in that: A retaining shelf (6) is fixedly connected to the outer surface of the fork body (3).

4. The three-stage four-lift hydraulic cylinder gantry according to claim 1, characterized in that: Each of the first hydraulic cylinder bodies (7) is fixedly connected to a first sprocket connector (8), and a first sprocket (9) is mounted on the outer surface of each of the first sprocket connectors (8). A first chain (10) is engaged with the outside of each of the first sprockets (9).

5. A three-stage four-lift hydraulic cylinder gantry according to claim 4, characterized in that: The two ends of the first chains (10) are fixedly connected to the outer surfaces of the outer gantry (1) and the inner gantry (2), respectively.

6. A three-stage four-lift hydraulic cylinder gantry according to claim 1, characterized in that: Each of the second hydraulic cylinder bodies (13) has a positioning block (16) fixedly connected to its outer surface, and the two ends of the two second chains (15) are fixedly connected to the outer surfaces of the fork body (3) and the positioning block (16), respectively.

7. A three-stage four-lift hydraulic cylinder gantry according to claim 1, characterized in that: Each of the interface protective sleeves (22) has a rubber sleeve (23) fixedly connected to its inner wall.

8. A three-stage four-lift hydraulic cylinder gantry according to claim 1, characterized in that: Each of the support plates (12) has a reinforcing rib (24) welded to its bottom surface, and the other side of each of the two reinforcing ribs (24) is welded to the outer surface of the two connecting plates (11).

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