Forklift steering axle structure

Abstract

The forklift steering axle structure comprises an axle body, an oil cylinder assembly and two steering knuckles, the left end and the right end of the oil cylinder assembly are rotationally connected with the steering knuckles through connecting rods, the steering knuckles and the axle body are rotationally connected through main pin rods, and the outer surfaces of the steering knuckles are rotationally connected with wheel assemblies. Master pin seats are arranged at the upper end and the lower end of the master pin rod, first grease holes capable of injecting oil to the upper end and the lower end of the master pin rod are formed in the master pin seats, second grease holes capable of injecting oil to the side face of the master pin rod are formed in the steering knuckle, and hole plugs are detachably installed at openings of the first grease holes and the second grease holes. The two first grease holes and the second grease hole are formed, compared with the prior art, the number of the grease holes is increased, the structure of the main pin rod is improved, grease is conveniently injected into the main pin rod, the main pin rod can be fully lubricated, and the service life of the steering axle is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of steering axles, in particular to a forklift steering axle structure. Background Art

[0002] Forklift is the most commonly used material handling vehicle, widely used in various places such as stations, ports, airports, factories, warehouses, etc. It is an efficient equipment for mechanized loading and unloading, stacking and short-distance transportation. The forklift steering axle is one of the main members of the forklift transmission system.

[0003] The forklift steering axle is responsible for steering during the movement. It uses the steering knuckle in the axle to deflect the wheels at both ends to a certain angle to achieve the steering of the forklift. In addition to bearing the vertical load of the forklift, it also bears the longitudinal force and lateral force and the torque caused by these forces. The kingpin in the steering axle plays the role of connecting the steering knuckle and the bridge body.

[0004] The existing forklift steering axle kingpin rod has only one grease hole, and injecting grease cannot fully lubricate the bearing, which affects the service life of the forklift;

[0005] Moreover, the upper and lower end covers have poor sealing performance, which can easily cause grease leakage and affect the service life of the needle roller bearings, so this needs to be improved. Utility Model Content

[0006] The utility model aims to provide a forklift steering axle structure to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a forklift steering axle structure, comprising a bridge body, a cylinder assembly and two steering knuckles, the left and right ends of the cylinder assembly are rotatably connected to the steering knuckle through a connecting rod, the steering knuckle and the bridge body are rotatably connected through a kingpin rod, the outer surface of the steering knuckle is rotatably connected to the wheel assembly, the upper and lower ends of the kingpin rod are provided with kingpin seats, the kingpin seat is provided with a first grease hole for injecting oil to the upper and lower ends of the kingpin rod, the steering knuckle is provided with a second grease hole for injecting oil to the side of the kingpin rod, and the openings of the first grease hole and the second grease hole are both removably installed with hole plugs.

[0008] Preferably, the kingpin rod and the bridge body are matched through a needle bearing.

[0009] Preferably, reinforcing ribs are fixedly connected to the surface of the bridge body.

[0010] Preferably, a thrust tapered roller bearing is provided between the steering knuckle and the bridge body, and the thrust tapered roller bearing is sleeved on the outer side of the kingpin rod.

[0011] Preferably, an oil seal retaining ring and a first oil seal are arranged between one side of the wheel assembly and the steering knuckle, and an O-ring is arranged at one end of the wheel assembly away from the oil seal retaining ring.

[0012] Preferably, the outer surfaces of the upper and lower ends of the kingpin rod are both sleeved with a second oil seal.

[0013] Preferably, a connecting ear is fixedly welded on the outer surface of the steering knuckle, one end of the connecting rod is rotatably connected to the telescopic end of the oil cylinder assembly, and the other end of the connecting rod is rotatably connected to the connecting ear.

[0014] Beneficial Effects

[0015] The utility model provides a forklift steering axle structure, which has the following beneficial effects:

[0016] 1. The forklift steering axle structure is provided with two first grease holes and one second grease hole. Compared with the prior art, the number of grease holes is increased, the structure of the kingpin rod is improved, and it is convenient for injecting grease into the kingpin rod. The kingpin rod can be fully lubricated, thereby improving the service life of the steering axle.

[0017] 2. The forklift steering axle structure, by setting the kingpin seat, oil seal retaining ring, first oil seal, O-ring and two second oil seals, can play a good role in dust and rust prevention, and prevent the risk of grease leakage by optimizing the wheel side sealing structure, effectively improving the sealing performance, thereby ensuring that the needle bearing and thrust tapered roller bearing can be fully lubricated, effectively improving the service life of the bearing.

[0018] 3. The forklift steering axle structure can achieve the connection between the bridge body and the steering knuckle and the steering function of the steering knuckle by arranging the thrust tapered roller bearing. At the same time, the thrust tapered roller bearing supports the steering knuckle in the forklift steering axle, avoiding damage to the needle roller bearing due to excessive load under severe working conditions, and improving the service life of the needle roller bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a forklift steering axle structure proposed by the utility model;

[0020] Figure 2 This is a front view structural diagram of a forklift steering axle structure proposed by the utility model;

[0021] Figure 3 This is a rear cross-sectional structural diagram of a forklift steering axle structure proposed by the utility model;

[0022] Figure 4 A forklift steering bridge structure proposed by the utility model Figure 3 A is a schematic diagram of the enlarged structure.

[0023] In the figure: 1. bridge body; 2. cylinder assembly; 3. steering knuckle; 4. connecting rod; 5. kingpin rod; 6. wheel assembly; 7. kingpin seat; 8. first grease hole; 9. second grease hole; 10. reinforcing rib; 11. oil seal retaining ring; 12. first oil seal; 13. O-ring; 14. needle bearing; 15. second oil seal; 16. thrust tapered roller bearing. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution: a forklift steering axle structure, including a bridge body 1, a cylinder assembly 2 and two steering knuckles 3, the left and right ends of the cylinder assembly 2 are rotatably connected with the steering knuckle 3 through a connecting rod 4, a connecting ear is fixedly welded on the outer surface of the steering knuckle 3, one end of the connecting rod 4 is rotatably connected with the telescopic end of the cylinder assembly 2, and the other end of the connecting rod 4 is rotatably connected with the connecting ear.

[0026] The steering knuckle 3 and the bridge body 1 are rotatably connected through the kingpin rod 5. The outer surface of the steering knuckle 3 is rotatably connected to the wheel assembly 6. Kingpin seats 7 are provided at the upper and lower ends of the kingpin rod 5. The kingpin seat 7 is provided with a first grease hole 8 for injecting oil to the upper and lower ends of the kingpin rod 5. The steering knuckle 3 is provided with a second grease hole 9 for injecting oil to the side of the kingpin rod 5, and hole plugs are removably installed at the openings of the first grease hole 8 and the second grease hole 9. By providing two first grease holes 8 and one second grease hole 9, compared with the prior art, the structure of the kingpin rod 5 is improved by increasing the number of grease holes, which provides convenience for injecting grease into the kingpin rod 5, and can make the kingpin rod 5 fully lubricated, thereby improving the service life of the steering axle.

[0027] The kingpin rod 5 is matched with the bridge body 1 through the needle bearing 14, so that the steering knuckle 3 and the bridge body 1 form a rotation connection.

[0028] The surface of the bridge body 1 is fixedly connected with reinforcing ribs 10 , and the overall bearing capacity of the bridge body 1 is effectively improved by providing the reinforcing ribs 10 .

[0029] A thrust tapered roller bearing 16 is arranged between the steering knuckle 3 and the bridge body 1, and the thrust tapered roller bearing 16 is sleeved on the outside of the kingpin rod 5. By arranging the thrust tapered roller bearing 16, the connection between the bridge body 1 and the steering knuckle 3 can be realized, and the steering function of the steering knuckle 3 can be realized. At the same time, the thrust tapered roller bearing 16 realizes the support of the steering knuckle 3 in the forklift steering axle, avoiding damage to the needle roller bearing 14 due to excessive load under harsh working conditions, and improving the service life of the needle roller bearing 14.

[0030] Since the steering knuckle 3, the kingpin rod 5, the needle bearing 14 and the thrust tapered roller bearing 16 can be fully lubricated, the load strength is large and the sealing performance is good, the entire steering axle structure can be used in harsh working conditions, thereby improving the scope of application.

[0031] An oil seal retaining ring 11 and a first oil seal 12 are arranged between one side of the wheel assembly 6 and the steering knuckle 3, an O-ring 13 is arranged at one end of the wheel assembly 6 away from the oil seal retaining ring 11, and the outer surfaces of the upper and lower ends of the kingpin rod 5 are sleeved with a second oil seal 15. By arranging the kingpin seat 7, the oil seal retaining ring 11, the first oil seal 12, the O-ring 13 and the two second oil seals 15, and optimizing the wheel side sealing structure, it can play a good role in dust prevention, rust prevention, and prevention of grease leakage risks, and effectively improve the sealing performance, thereby ensuring that the needle bearing 14 and the thrust tapered roller bearing 16 can be fully lubricated, effectively improving the service life of the bearings, thereby ensuring the service life of the forklift steering axle.

[0032] In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A forklift steering axle structure, comprising a bridge body (1), a cylinder assembly (2) and two steering knuckles (3), characterized in that: The left and right ends of the oil cylinder assembly (2) are rotatably connected to the steering knuckle (3) via a connecting rod (4); the steering knuckle (3) and the bridge body (1) are rotatably connected via a kingpin rod (5); the outer surface of the steering knuckle (3) is rotatably connected to the wheel assembly (6); the upper and lower ends of the kingpin rod (5) are provided with kingpin seats (7); the kingpin seats (7) are provided with first grease holes (8) capable of injecting oil into the upper and lower ends of the kingpin rod (5); the steering knuckle (3) is provided with second grease holes (9) capable of injecting oil into the side of the kingpin rod (5); and hole plugs are detachably installed at the openings of the first grease holes (8) and the second grease holes (9).

2. A forklift steering axle structure according to claim 1, characterized in that: The kingpin rod (5) and the bridge body (1) are matched via a needle bearing (14).

3. A forklift steering axle structure according to claim 1, characterized in that: A reinforcing rib (10) is fixedly connected to the surface of the bridge body (1).

4. A forklift steering axle structure according to claim 2, characterized in that: A thrust tapered roller bearing (16) is arranged between the steering knuckle (3) and the bridge body (1), and the thrust tapered roller bearing (16) is sleeved on the outer side of the kingpin rod (5).

5. A forklift steering axle structure according to claim 4, characterized in that: An oil seal retaining ring (11) and a first oil seal (12) are provided between one side of the wheel assembly (6) and the steering knuckle (3), and an O-ring (13) is provided at one end of the wheel assembly (6) away from the oil seal retaining ring (11).

6. A forklift steering axle structure according to claim 5, characterized in that: The outer surfaces of the upper and lower ends of the kingpin rod (5) are both sleeved with second oil seals (15).

7. The forklift steering axle structure according to claim 1, characterized in that: A connecting ear is fixedly welded on the outer surface of the steering knuckle (3); one end of the connecting rod (4) is rotatably connected to the telescopic end of the oil cylinder assembly (2); and the other end of the connecting rod (4) is rotatably connected to the connecting ear.

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