Rotary fixing structure of traction chain and forklift portal frame system

Abstract

The utility model discloses a rotary type fixing structure of traction chain and forklift mast system, including chain and a connecting device, the connecting device includes a fixed structure and a rotating structure, the fixed structure is connected with the rotating structure through a rotating member, one end of the chain is connected with the rotating structure, and the other end of the chain is connected with the connecting device. And when the other end of the chain deflects, the rotating structure generates angular deflection to ensure that the stress of the chain is always along the extension direction of the chain. By means of the mode, the phenomenon that the chain suffers from harmful component force when the chain deviates or inclines to a certain degree can be automatically adapted, it is guaranteed that the chain is stressed in the extending direction of the chain all the time, and the risk that the chain falls off and is snapped is reduced.

Description

Technical Field

[0001] The utility model relates to the field of construction machinery, in particular to a rotating fixing structure of a traction chain and a forklift mast system. Background Art

[0002] At present, most forklifts complete the lifting function of the entire mast system through a lifting cylinder, a traction chain and related components, so as to achieve the handling of goods. In the current mast system including a traction chain, the installation method of the traction chain is basically to fix it in corresponding installation holes through long and short joints at both ends of the chain. This structure requires that the axes of the installation holes of the chain in the mast system and the axes of the joints at both ends always remain parallel, so that the force on the chain always acts along the extending direction of the chain. However, when the forklift is in use, there will be various situations, and it is very difficult to always ensure that the axes of the chain joints at both ends are parallel. Once the parallelism deviation angle of the axes is too large, harmful component forces will be generated, which will damage the chain itself and increase the risk of chain pin removal and breakage.

[0003] Therefore, a new rotating fixing structure is needed to be connected with the chain to ensure that when the chain is subjected to forces in other directions, the force on the chain always acts along the extending direction of the chain, and reduce the risk of chain pin removal and breakage. Summary of the Utility Model

[0004] The main technical problem to be solved by the utility model is to provide a rotating fixing structure of a traction chain, which can automatically adapt to the phenomenon that harmful component forces are generated when the chain deviates or tilts to a certain extent when the chain is subjected to forces in other directions, ensure that the force on the chain always acts along the extending direction of the chain, and reduce the risk of chain pin removal and breakage. The utility model also provides a forklift mast system.

[0005] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a rotating fixing structure of a traction chain, including a chain and a connecting device, the connecting device includes a fixing structure and a rotating structure, the fixing structure is connected with the rotating structure through a rotating member, one end of the chain is connected to the rotating structure, and when the other end of the chain deflects, the rotating structure has an angular offset to ensure that the force on the chain always acts along the extending direction of the chain.

[0006] The fixing structure includes a chain fixing shaft head, the rotating structure includes a chain fixing plate, the bottom end of the chain fixing shaft head is fixed on a lifting component and is connected with the chain fixing plate through the rotating member, and the chain is connected with the chain fixing plate through a locking device.

[0007] The rotating member includes a steel-backed bearing. A fixing hole is provided on the chain fixing plate. The steel-backed bearing is sleeved on the chain fixing shaft head, and the fixing hole is sleeved on the steel-backed bearing. The chain fixing plate is sleeved on the steel-backed bearing through the fixing hole, avoiding direct dry friction between the chain fixing shaft head and the chain fixing plate, ensuring that the chain fixing plate can rotate around the chain fixing shaft head by a certain angle, so as to ensure that the force on the chain is always along the extending direction of the chain, and reducing the risk of chain pin detachment and breakage.

[0008] A chain socket is provided at the upper end of the chain fixing plate for mating with the end of the chain. Pin holes are provided on both sides of the chain socket, and the locking device is inserted into the pin holes to connect the chain and the chain fixing plate.

[0009] The locking device includes a chain fixing pin shaft and a split pin. An opening pin hole is provided at one end of the chain fixing pin shaft. The split pin is inserted into the opening pin hole, which can prevent the chain fixing pin shaft from sliding out of the chain fixing plate.

[0010] Another opening pin hole or an end cap with a diameter larger than the diameter of the pin hole is provided at the other end of the chain fixing pin shaft away from the opening pin hole.

[0011] The number of the chain sockets is one or two.

[0012] The fixing hole is a stepped hole.

[0013] A shaft retaining ring groove is provided on the chain fixing shaft head, and a shaft retaining ring is arranged in the shaft retaining ring groove. By clamping the shaft retaining ring in the shaft retaining ring groove, the chain fixing plate is prevented from slipping off the chain fixing shaft head.

[0014] A forklift mast system includes the rotating fixed structure of the traction chain described in any of the above technical solutions.

[0015] The beneficial effects of the present utility model are as follows: A rotating fixed structure of a traction chain provided by the present utility model can automatically adapt to the phenomenon that harmful component forces are generated when the chain is deflected or tilted to a certain extent under the action of forces in other directions, ensuring that the force on the chain is always along the extending direction of the chain, and reducing the risk of chain pin detachment and breakage. Description of the Drawings

[0016] Figure 1 is the overall structure schematic diagram of Embodiment 1 of the present utility model;

[0017] Figure 2 is the structure schematic diagram of Embodiment 1 of the present utility model in different working states;

[0018] Figure 3 It is an enlarged structure view of Embodiment 1 of the present utility model;

[0019] Figure 4 It is an exploded view of Embodiment 1 of the present utility model;

[0020] Figure 5 It is a schematic structural view of the chain fixing shaft head of Embodiment 1 of the present utility model;

[0021] Figure 6 and Figure 7 It is a schematic structural view of the chain fixing plate of Embodiment 1 of the present utility model;

[0022] Figure 8 It is a schematic structural view of the chain fixing pin shaft of Embodiment 1 of the present utility model;

[0023] Figure 9 It is a schematic structural view of the chain fixing pin shaft of Embodiment 2 of the present utility model.

[0024] 1. Chain; 2. Connecting device; 3. Fixing structure; 31. Chain fixing shaft head; 311. Axial circlip groove; 312. Axial circlip; 4. Rotating structure; 41. Chain fixing plate; 5. Rotating part; 51. Steel-backed bearing; 6. Locking device; 61. Chain fixing pin shaft; 62. Split pin; 611. Split pin hole; 612. End cap; 7. Fixing hole; 71. Step hole; 8. Chain socket; 9. Pin hole. Detailed implementation manners

[0025] The following combines the accompanying drawings to elaborate on the preferred embodiments of the present utility model in detail, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0026] Embodiment 1

[0027] Please refer to Figure 1 and Figure 2 , a rotating fixed structure of a traction chain of the present utility model includes a chain 1 and a connecting device 2. The connecting device 2 includes a fixing structure 3 and a rotating structure 4. The fixing structure 3 is connected to the rotating structure 4 through a rotating part 5. One end of the chain 1 is connected to the rotating structure 4. When the other end of the chain 1 deflects, the rotating structure 4 ensures that the force on the chain always acts along the extension direction of the chain by rotating the angle, realizing automatic adaptation to the phenomenon that when the chain undergoes a certain offset or tilt, harmful component forces are generated on the chain, thereby reducing the risk of chain pin removal and chain breakage. As Figure 2 shown, when the chain 1 is acted upon by forces in other directions, the rotating structure 4 ensures that the force on the chain always acts along the extension direction of the chain by rotating the angle.

[0028] As Figure 3 and Figure 4 shown, the fixing structure 3 includes a chain fixing shaft head 31, the rotating structure 4 includes a chain fixing plate 41, the bottom end of the chain fixing shaft head 31 is fixed on the lifting component, and is connected to the chain fixing plate 41 through the rotating member 5. The chain 1 is connected to the chain fixing plate 41 through a locking device 6.

[0029] Specifically, the rotating member 5 includes a steel-backed bearing 51. A fixing hole 7 is provided on the chain fixing plate 41. The steel-backed bearing 51 is sleeved on the chain fixing shaft head 31, and the chain fixing plate 41 is sleeved on the steel-backed bearing 51 through the fixing hole 7, avoiding direct dry grinding between the chain fixing shaft head 31 and the chain fixing plate 41, ensuring that the chain fixing plate 41 can rotate around the chain fixing shaft head 31 by a certain angle, so as to ensure that the force on the chain is always along the extending direction of the chain, reducing the risk of chain pin removal and breakage. As Figure 5 shown, a shaft retaining ring groove 311 is provided on the chain fixing shaft head 31, and a shaft retaining ring 312 is clamped in the shaft retaining ring groove 311 to prevent the chain fixing plate 41 from slipping off the chain fixing shaft head 31.

[0030] Furthermore, the fixing hole 7 is a stepped hole 71, see Figure 7 .

[0031] A chain socket 8 and a pin hole 9 are provided on the chain fixing plate 41. As Figure 6 and Figure 7 shown, a chain socket 8 is provided at the upper end of the chain fixing plate 41 for mating with the end of the chain. Pin holes 9 are provided on both sides of the chain socket 8. The chain 1 and the chain fixing plate 41 are connected by inserting the locking device 6 into the pin holes 9, see Figure 3 .

[0032] In this embodiment, two chain sockets 8 are provided on the chain fixing plate 41 for placing the end link plates of the chain 1. In another embodiment, the number of the chain sockets 8 can also be one.

[0033] Specifically, the locking device 6 includes a chain fixing pin 61 and a split pin 62, see Figure 8, one end of the chain fixing pin shaft 61 is provided with an open pin hole 611, and at the other end away from the open pin hole 611, there is an end cap 612 with a diameter larger than the diameter of the pin hole 9 on the chain fixing plate 41. The end link plate of the end of the chain 1 is placed into the chain socket 8, and the chain fixing pin shaft 61 is inserted into the pin hole 9 to realize the connection between the chain 1 and the chain fixing plate 41. The open pin 7 is inserted into the open pin hole 611, which can prevent the chain fixing pin shaft 61 from slipping out of the chain fixing plate 41.

[0034] Embodiment 2

[0035] Figure 9 Another embodiment of a rotational fixing structure of a traction chain provided by the present invention is shown. In this embodiment, other structures are the same as those in Embodiment 1 except for the chain fixing pin shaft 61. In this embodiment, both ends of the chain fixing pin shaft 61 are provided with open pin holes 611, which are used in cooperation with the open pin 62 to fix the chain fixing plate 41 and the chain 1, and prevent the chain fixing pin shaft 61 from slipping out of the chain fixing plate 41.

[0036] A rotational fixing structure of a traction chain provided by the present invention can be applied to a forklift mast system. The other end of the chain 1 is a movable end. When the forklift mast is lifted or lowered, the movable end of the chain 1 is deflected in position under force. The rotational fixing structure of the traction chain rotates a certain angle through the mutual cooperation of the fixing structure 3 and the rotating structure 4, ensuring that the force on the chain always acts along the extension direction of the chain, thereby reducing the risk of chain pin removal and chain breakage.

[0037] The present invention also provides a forklift mast system, including the rotational fixing structure of the traction chain described in any of the above technical solutions. The rotational fixing structure of the traction chain is fixed on the lifting component of the forklift mast system. Obviously, this forklift mast system has all the beneficial effects of the above-mentioned rotational fixing structure of the traction chain, which will not be elaborated here.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A rotating fixed structure of a traction chain, characterized in that: The invention comprises a chain (1) and a connecting device (2), wherein the connecting device (2) comprises a fixed structure (3) and a rotating structure (4), wherein the fixed structure (3) is connected to the rotating structure (4) via a rotating member (5), and one end of the chain (1) is connected to the rotating structure (4). When the other end of the chain (1) moves, the rotating structure (4) is angularly offset to ensure that the force applied to the chain (1) is always along the extension direction of the chain (1).

2. The rotary fixing structure of a traction chain according to claim 1, characterized in that: The fixed structure (3) includes a chain fixed shaft head (31), and the rotating structure (4) includes a chain fixed plate (41). The bottom end of the chain fixed shaft head (31) is fixed on the lifting component and connected to the chain fixed plate (41) via the rotating member (5). The chain (1) is connected to the chain fixed plate (41) via a locking device (6).

3. The rotary fixing structure of a traction chain according to claim 2, characterized in that: The rotating member (5) comprises a steel back bearing (51), a fixing hole (7) is provided on the chain fixing plate (41), the steel back bearing (51) is sleeved on the chain fixing shaft head (31), and the fixing hole (7) is sleeved on the steel back bearing (51).

4. The rotary fixing structure of a traction chain according to claim 2, characterized in that: The upper end of the chain fixing plate (41) is provided with a chain socket (8) for cooperating with the end of the chain, and pin holes (9) are provided on both sides of the chain socket (8). The locking device (6) is inserted into the pin holes (9) to connect the chain (1) and the chain fixing plate (41).

5. The rotary fixing structure of a traction chain according to claim 2, characterized in that: The locking device (6) comprises a chain fixing pin shaft (61) and a split pin (62), and a split pin hole (611) is provided at one end of the chain fixing pin shaft (61).

6. The rotary fixing structure of a traction chain according to claim 5, characterized in that: The other end of the chain fixing pin shaft (61) away from the split pin hole (611) is provided with a split pin hole (611) or an end cap (612) having a diameter larger than the diameter of the pin hole (9).

7. The rotary fixing structure of a traction chain according to claim 4, characterized in that: The number of the chain sockets (8) is one or two.

8. The rotary fixing structure of a traction chain according to claim 3, characterized in that: The fixing hole (7) is a stepped hole (71).

9. The rotary fixing structure of a traction chain according to claim 2, characterized in that: The chain fixed shaft head (31) is provided with a shaft elastic circlip groove (311), and a shaft elastic circlip (312) is provided in the shaft elastic circlip groove (311).

10. A forklift gantry system, characterized in that: A rotating fixed structure comprising the traction chain according to any one of claims 1 to 9.

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