A turnover hinge structure of a forklift seat

Abstract

The utility model discloses a kind of turnover hinge structures of fork truck seat, including fork truck cushion, fork truck backrest, first hinge assembly and second hinge assembly, first hinge assembly and second hinge assembly are both composed of first hinged blade and second hinged blade, first hinged blade is connected on the bottom end of fork truck backrest, second hinged blade is connected on the back of fork truck cushion, in the utility model, by the setting of first hinged blade, first sliding hole and first spline hole, and the setting of second hinged blade, second sliding hole, storage hole and second spline hole, the locking effect of turnover between first hinged blade and second hinged blade and the release effect of locking are realized, to realize the turnover and locking effect of fork truck backrest, compared with prior art, the turnover effect of fork truck backrest is realized, appropriate comfort is provided for driver, while the angle locking effect after turnover is realized, improve stability, avoid the problem of shaking in driving process.

Description

Technical Field

[0001] This utility model relates to the field of hinge structure technology, and in particular to a flip hinge structure for a forklift seat. Background Technology

[0002] Forklift seats are specialized seats installed on forklifts for operators to sit in, primarily to provide comfort, safety, and operational stability. They are an important component of the forklift driving system, directly impacting the driver's work efficiency and physical health.

[0003] Traditional forklift seats typically have a fixed angle between the seat cushion and backrest (e.g., only 90°), which affects the driver's comfort and cannot be adjusted according to personal preference. Even though hinged connections exist to achieve backrest flipping, these hinges lack self-locking functionality, causing the backrest to wobble during driving and resulting in poor stability. Therefore, a flipping hinge structure for forklift seats is needed to meet people's needs. Utility Model Content

[0004] The purpose of this utility model is to provide a flip hinge structure for a forklift seat to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flip hinge structure for a forklift seat, comprising a forklift seat cushion, a forklift backrest, a first hinge assembly, and a second hinge assembly. Both the first and second hinge assemblies are composed of a first hinge blade and a second hinge blade. The first hinge blade is connected to the bottom end of the forklift backrest, and the second hinge blade is connected to the back end of the forklift seat cushion. One end of the first hinge blade has a first sliding hole, and one end of the first sliding hole has a first spline hole. One end of the second hinge blade... A second sliding hole is provided on the upper part, a receiving hole is provided at one end of the second sliding hole, and a second spline hole is provided at one end of the receiving hole. The same spline shaft is axially slidably connected in the second spline hole and the first spline hole. A drive rod is slidably connected in the first sliding hole located at the first hinge assembly. The drive rod is connected to the end of the spline shaft at that location. A long shaft is connected between the two spline shafts of the first hinge assembly and the second hinge assembly. One end of the long shaft is slidably connected in the second sliding hole of the first hinge assembly, and the other end is slidably connected in the first sliding hole of the second hinge assembly.

[0006] Preferably, the first hinge blade and the second hinge blade are both connected to the bottom of the forklift backrest and the back of the forklift seat respectively by screws.

[0007] Preferably, the diameter of the receiving hole is slightly larger than the outer diameter of the spline shaft.

[0008] Preferably, a return spring is provided between the end of the receiving hole near the second sliding hole and the end of the spline shaft.

[0009] Preferably, a third hinge assembly is provided between the middle of the forklift seat and the forklift backrest. The third hinge assembly consists of a third hinge blade and a fourth hinge blade. The same torsion spring is provided inside the third hinge blade and the fourth hinge blade. One end of the torsion spring passes through the shaft of the third hinge blade, and the other end passes through the shaft of the fourth hinge blade.

[0010] Preferably, the third hinge blade and the fourth hinge blade are respectively connected to the bottom of the forklift backrest and the back of the forklift seat by screws.

[0011] Preferably, a third sliding hole is provided on one end of the third hinge blade, and a fourth sliding hole is provided on one end of the fourth hinge blade, with the long shaft slidably connected in the third and fourth sliding holes.

[0012] The beneficial effects of this utility model are:

[0013] This invention achieves the locking and unlocking effects of the forklift backrest by setting a first hinge blade, a first sliding hole, and a first spline hole, as well as a second hinge blade, a second sliding hole, a storage hole, and a second spline hole. This enables the forklift backrest to flip and lock, providing the driver with appropriate comfort and locking the angle after flipping, thus improving stability and preventing swaying during driving.

[0014] In this invention, the third hinge assembly, consisting of the third hinge blade, the fourth hinge blade, and the torsion spring, effectively avoids the sudden overturning problem caused by inertia and gravity during the backward tilting adjustment of the forklift backrest, and effectively provides a certain resistance for the backward tilting adjustment. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of a flip hinge structure for a forklift seat proposed in this utility model.

[0016] Figure 2 This is a rear view schematic diagram of a flip hinge structure for a forklift seat proposed in this utility model.

[0017] Figure 3 This is a front exploded view of the first hinge assembly of the flip hinge structure of a forklift seat proposed in this utility model.

[0018] Figure 4 This is a rear exploded view of the first hinge assembly of a forklift seat flip hinge structure proposed in this utility model.

[0019] Figure 5 This is a front exploded view of the third hinge assembly of a forklift seat flip hinge structure proposed in this utility model.

[0020] Figure 6 This is a rear exploded view of the third hinge assembly of a forklift seat flip hinge structure proposed in this utility model.

[0021] Figure 7 A top-view cross-sectional view of a forklift seat cushion with a flip hinge structure proposed in this utility model.

[0022] Figure 8 This utility model proposes a flip hinge structure for a forklift seat. Figure 7 Enlarged structural diagram at point A in the middle;

[0023] Figure 9 This utility model proposes a flip hinge structure for a forklift seat. Figure 7 Enlarged structural diagram at point B;

[0024] Figure 10 This utility model proposes a flip hinge structure for a forklift seat. Figure 7 Enlarged structural diagram at point C.

[0025] In the diagram: 1. Forklift seat; 2. Forklift backrest; 3. First hinge assembly; 4. Second hinge assembly; 5. First hinge blade; 6. Second hinge blade; 7. First sliding hole; 8. First spline hole; 9. Second sliding hole; 10. Storage hole; 11. Second spline hole; 12. Spline shaft; 13. Drive rod; 14. Long shaft; 15. Return spring; 16. Third hinge assembly; 17. Third hinge blade; 18. Fourth hinge blade; 19. Torsion spring; 20. Third sliding hole; 21. Fourth sliding hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Reference Figure 1-10A flip-up hinge structure for a forklift seat includes a forklift seat cushion 1, a forklift backrest 2, a first hinge assembly 3, and a second hinge assembly 4. Both the first hinge assembly 3 and the second hinge assembly 4 are composed of a first hinge blade 5 and a second hinge blade 6. The first hinge blade 5 is connected to the bottom end of the forklift backrest 2, and the second hinge blade 6 is connected to the back of the forklift seat cushion 1. A first sliding hole 7 is formed at one end of the first hinge blade 5, and a first spline hole 8 is formed at one end of the first sliding hole 7. A second sliding hole 9 is formed at one end of the second hinge blade 6, and a first spline hole 8 is formed at one end of the second sliding hole 9. A receiving hole 10 is provided, and a second spline hole 11 is provided at one end of the receiving hole 10. The same spline shaft 12 is axially slidably connected in the second spline hole 11 and the first spline hole 8. A drive rod 13 is slidably connected in the first sliding hole 7 located at the first hinge assembly 3. The drive rod 13 is connected to the end of the spline shaft 12 at that location. A long shaft 14 is connected between the two spline shafts 12 of the first hinge assembly 3 and the second hinge assembly 4. One end of the long shaft 14 is slidably connected in the second sliding hole 9 of the first hinge assembly 3, and the other end is slidably connected in the first sliding hole 7 of the second hinge assembly 4.

[0028] By configuring the first hinge blade 5, the first sliding hole 7, and the first spline hole 8, as well as the second hinge blade 6, the second sliding hole 9, the receiving hole 10, and the second spline hole 11, the two ends of the spline shaft 12 are simultaneously engaged in the first spline hole 8 and the second spline hole 11, achieving a locking effect of flipping between the first hinge blade 5 and the second hinge blade 6. When the spline shaft 12 moves axially from the first spline hole 8 and the second spline hole 11 to the receiving hole 10, the locking effect of the first hinge blade 5 and the second hinge blade 6 is released, allowing the long shaft 14 and the drive rod 13 to serve as the support shafts for the first hinge blade 5 and the second hinge blade 6, thereby achieving the flipping effect of the forklift backrest 2. Compared with the prior art, this achieves the flipping effect of the forklift backrest 2, providing appropriate comfort for the driver, while also achieving an angle locking effect after flipping, improving stability and avoiding swaying problems during driving.

[0029] Specifically, in this embodiment, the first hinge blade 5 and the second hinge blade 6 are both connected to the bottom of the forklift backrest 2 and the back of the forklift seat 1 respectively by screws.

[0030] Specifically, in this embodiment, the diameter of the receiving hole 10 is slightly larger than the outer diameter of the spline shaft 12, which facilitates the axial movement of the spline shaft 12.

[0031] Specifically, in this embodiment, a return spring 15 is provided between the end of the receiving hole 10 near the second sliding hole 9 and the end of the spline shaft 12. When the spline shaft 12 moves from the first spline hole 8 and the second spline hole 11 to the receiving hole 10, the return spring 15 is compressed. When the spline shaft 12 moves from the receiving hole 10 toward the first spline hole 8 and the second spline hole 11, the elastic force of the compressed return spring 15 realizes the automatic movement effect of the spline shaft 12 and improves the stability of the spline shaft 12 in the first spline hole 8 and the second spline hole 11, avoiding axial movement.

[0032] Specifically, in this embodiment, a third hinge assembly 16 is provided between the forklift seat 1 and the forklift backrest 2 near the middle. The third hinge assembly 16 is composed of a third hinge blade 17 and a fourth hinge blade 18. The same torsion spring 19 is provided inside the third hinge blade 17 and the fourth hinge blade 18. One end of the torsion spring 19 passes through the shaft of the third hinge blade 17, and the other end passes through the shaft of the fourth hinge blade 18. The arrangement of the third hinge blade 17, the fourth hinge blade 18 and the torsion spring 19 to form the third hinge assembly 16 effectively avoids the problem of sudden overturning caused by inertia and gravity during the backward tilting adjustment of the forklift backrest 2, and effectively provides a certain resistance for the backward tilting adjustment.

[0033] Specifically, in this embodiment, the third hinge blade 17 and the fourth hinge blade 18 are respectively connected to the bottom end of the forklift backrest 2 and the back of the forklift seat 1 by screws.

[0034] Specifically, in this embodiment, a third sliding hole 20 is provided on one end of the third hinge blade 17, and a fourth sliding hole 21 is provided on one end of the fourth hinge blade 18. The long shaft 14 is axially slidably connected in the third sliding hole 20 and the fourth sliding hole 21, realizing the effect of the long shaft 14 passing through the third hinge assembly 16, and at the same time making the long shaft 14 provide a flipping support shaft for the third hinge blade 17 and the fourth hinge blade 18.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A flip-up hinge structure for a forklift seat, comprising a forklift seat cushion (1), a forklift backrest (2), a first hinge assembly (3), and a second hinge assembly (4), characterized in that: Both the first hinge assembly (3) and the second hinge assembly (4) are composed of a first hinge blade (5) and a second hinge blade (6). The first hinge blade (5) is connected to the bottom end of the forklift backrest (2), and the second hinge blade (6) is connected to the back of the forklift seat (1). One end of the first hinge blade (5) has a first sliding hole (7), and one end of the first sliding hole (7) has a first spline hole (8). One end of the second hinge blade (6) has a second sliding hole (9), and one end of the second sliding hole (9) has a storage hole (10). One end of the storage hole (10) has a second spline hole. The same spline shaft (12) is axially slidably connected in the hole (11), the second spline hole (11) and the first spline hole (8). A drive rod (13) is slidably connected in the first sliding hole (7) located at the first hinge assembly (3). The drive rod (13) is connected to the end of the spline shaft (12) at that location. A long shaft (14) is connected between the two spline shafts (12) of the first hinge assembly (3) and the second hinge assembly (4). One end of the long shaft (14) is slidably connected in the second sliding hole (9) of the first hinge assembly (3), and the other end is slidably connected in the first sliding hole (7) of the second hinge assembly (4).

2. The flip hinge structure for a forklift seat according to claim 1, characterized in that: The first hinge blade (5) and the second hinge blade (6) are respectively connected to the bottom of the forklift backrest (2) and the back of the forklift seat (1) by screws.

3. The flip hinge structure for a forklift seat according to claim 1, characterized in that: The diameter of the receiving hole (10) is slightly larger than the outer diameter of the spline shaft (12).

4. The flip hinge structure for a forklift seat according to claim 1, characterized in that: A return spring (15) is provided between the end of the receiving hole (10) near the second sliding hole (9) and the end of the spline shaft (12).

5. The flip hinge structure for a forklift seat according to claim 1, characterized in that: A third hinge assembly (16) is also provided between the forklift seat (1) and the forklift backrest (2) near the middle. The third hinge assembly (16) is composed of a third hinge blade (17) and a fourth hinge blade (18). The same torsion spring (19) is provided in the third hinge blade (17) and the fourth hinge blade (18). One end of the torsion spring (19) passes through the shaft of the third hinge blade (17) and the other end passes through the shaft of the fourth hinge blade (18).

6. The flip hinge structure for a forklift seat according to claim 5, characterized in that: The third hinge blade (17) and the fourth hinge blade (18) are respectively connected to the bottom of the forklift backrest (2) and the back of the forklift seat (1) by screws.

7. The flip hinge structure for a forklift seat according to claim 5, characterized in that: The third hinge blade (17) has a third sliding hole (20) at one end, and the fourth hinge blade (18) has a fourth sliding hole (21) at one end. The long shaft (14) is axially slidably connected in the third sliding hole (20) and the fourth sliding hole (21).

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