Forced locking differential mechanism shifting fork lifting pin structure of engineering machinery drive axle

Abstract

The utility model discloses a shifting fork lifting pin structure of a forced locking differential mechanism of an engineering machinery drive axle. The shifting fork lifting pin structure comprises a differential mechanism shell, a shifting fork limiting ring, an O-shaped ring and a lifting pin, the shifting fork limiting ring is arranged on the differential mechanism shell. The lifting pin is located in a lifting pin hole of the differential mechanism shell, and an O-shaped groove is formed in the outer circle of the lifting pin. The O-shaped ring is assembled on the O-shaped groove in the outer circle of the lifting pin; the number of the O-shaped grooves in the outer circle of the lifting pin is two. The O-shaped ring comprises an outer O-shaped ring and an inner O-shaped ring which are assembled on the two O-shaped grooves in the outer circle of the lifting pin respectively. The lifting pin is simple in structure, low in manufacturing and maintenance cost, convenient to assemble and reliable to use, and solves the problem that the end face of the lifting pin is easy to loosen and abrades a shifting fork limiting ring when the input rotating speed of a drive axle is high in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of forced locking differentials of drive axles of engineering machinery including loaders, excavator loaders, forklifts and the like, and in particular to a fork top pin structure of forced locking differentials of drive axles of engineering machinery. Background Art

[0002] The existing forced locking differentials of the drive axles of engineering machinery, including loaders, excavators and forklifts, generally adopt a push pin structure, and an O-ring is arranged on the outer circle of the push pin. The forced locking differential fork push pin structure has the following disadvantages: when the input speed of the drive axle is high, the clamping force of the O-ring of the forced locking differential push pin cannot overcome the centrifugal force of the high-speed rotation of the differential, which easily leads to the loosening of the push pin end face and the wear of the fork limit ring. Summary of the invention

[0003] The purpose of the utility model is to solve the above defects and provide a forced locking differential fork push pin structure of an engineering machinery drive axle which has a simple structure, low manufacturing and maintenance costs, is easy to assemble and reliable to use, thereby solving the problem in the prior art that the push pin end face is easily loosened and the fork limit ring is worn when the input speed of the drive axle is high.

[0004] To achieve the above purpose, the utility model of the forced locking differential fork push pin structure of the engineering machinery drive axle includes a differential housing 1, a fork limit ring 2, an O-ring and a push pin 5; the fork limit ring 2 is arranged on the differential housing 1; the push pin 5 is located in the push pin hole of the differential housing 1, and an O-shaped groove is arranged on the outer circle of the push pin 5; the O-ring is assembled on the O-shaped groove on the outer circle of the push pin 5; there are two O-shaped grooves on the outer circle of the push pin 5; the O-ring includes an outer O-ring 3 and an inner O-ring 4, which are respectively assembled on the two O-shaped grooves on the outer circle of the push pin 5.

[0005] The above engineering machinery drive axle forced locking differential fork top pin structure has the following technical features and beneficial effects by adding an O-ring on the top pin:

[0006] 1. Add an O-ring to the top pin. When the input speed of the drive axle is high, the forced locking differential top pin is equipped with two O-rings, which can significantly increase the clamping force. The clamping force of the O-ring on the top pin is greater than the centrifugal force generated when the differential rotates at high speed, effectively preventing the top pin end face from loosening and wearing the shift fork limit ring, greatly improving the reliability of the drive axle;

[0007] 2. The structure is simple and compact, with low manufacturing and maintenance costs, easy assembly and reliable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a schematic diagram of the structure of a forced locking differential fork top pin of an engineering machinery drive axle.

[0009] Reference numerals: differential housing 1 , shift fork limiting ring 2 , outer O-ring 3 , inner O-ring 4 , ejector pin 5 . DETAILED DESCRIPTION

[0010] The specific implementation of the forced locking differential fork top pin structure of the engineering machinery drive axle of the utility model is further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 As shown, the utility model of the forced locking differential fork push pin structure of the engineering machinery drive axle comprises a differential housing 1, a fork limit ring 2, an O-ring and a push pin 5; the fork limit ring 2 is arranged on the differential housing 1; the push pin 5 is located in the push pin hole of the differential housing 1, and an O-shaped groove is arranged on the outer circle of the push pin 5; the O-ring is assembled on the O-shaped groove on the outer circle of the push pin 5; there are two O-shaped grooves on the outer circle of the push pin 5; the O-ring comprises an outer O-ring 3 and an inner O-ring 4, which are respectively assembled on the two O-shaped grooves on the outer circle of the push pin 5.

Claims

1. A forced locking differential fork ejector pin structure of an engineering machinery drive axle, comprising a differential housing (1), a fork stop ring (2), an O-ring and an ejector pin (5); the fork stop ring (2) is arranged on the differential housing (1); the ejector pin (5) is located in an ejector pin hole of the differential housing (1), and an O-shaped groove is arranged on the outer circle of the ejector pin (5); the O-ring is assembled on the O-shaped groove on the outer circle of the ejector pin (5); the characteristics are: The outer circle of the ejector pin (5) is provided with two O-shaped grooves; the O-shaped ring comprises an outer O-shaped ring (3) and an inner O-shaped ring (4), which are respectively assembled on the two O-shaped grooves on the outer circle of the ejector pin (5).

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