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Excavator stretching and contracting arm and excavator

An excavator and telescopic boom technology, applied in the field of construction machinery, can solve problems such as shortening the service life of the telescopic boom, and achieve the effects of prolonging the service life, reducing the amount of impurities and reducing wear and tear

Pending Publication Date: 2019-12-27
SHANGHAI SANY HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the pin shaft and the axle sleeve in the telescopic arm of the existing excavator are still prone to impurities and are subject to greater wear and tear, and the service life of the telescopic arm will still be reduced.

Method used

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  • Excavator stretching and contracting arm and excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the telescopic arm of the excavator provided in this embodiment includes a stick 1, a bucket and an airtight cover 4. One end of the stick 1 and the bucket are connected in rotation through a bushing 10, a rotating shaft 3 and an ear plate 2. The rotating shaft 3 is sleeved in the shaft sleeve 10 and installed on the ear plate 2. The airtight cover 4 is installed on the side of the end of the ear plate 2 near the rotating shaft 3, and an airtight space can be formed between the airtight cover 4 and the ear plate 2 to close the gap between the end of the rotating shaft 3 and the ear plate 2 .

[0035] When the telescopic arm of the excavator is working underwater, such as dredging underwater and dredging sand underwater, the telescopic arm of the excavator will stir up impurities such as water and sediment. flow in all directions. Since the telescopic arm of the excavator provided in this embodiment is provided with an airtight cover 4, the ...

Embodiment 2

[0075] The excavator provided in this embodiment is provided with the telescopic arm of the excavator in Embodiment 1, so the excavator provided in this embodiment can solve the same technical problems as the telescopic arm of the excavator in Embodiment 1 and achieve the same beneficial effect .

[0076] The excavator provided by this embodiment also alleviates the problem that in the prior art, when the telescopic arm of the excavator of the excavator is operating underwater, impurities are likely to follow the water flow along the axis of the pin shaft between the bucket and the arm 1. After passing through the gap between the bucket ear plate 2 and the pin shaft, continue to pass through the dust ring and enter between the shaft sleeve 10 on the arm 1 and the pin shaft, resulting in that the gap between the pin shaft and the shaft sleeve 10 is still It will be subject to greater wear and tear and reduce the technical problem of the service life of the telescopic arm of the...

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Abstract

The invention provides an excavator stretching and contracting arm and an excavator and relates to the field of construction machinery. The excavator stretching and contracting arm comprises a bucketrod, a bucket and a closed hood, wherein one end of the bucket rod is rotatably connected with the bucket through a shaft sleeve, a rotating shaft and lug plates, the rotating shaft is connected inside the shaft sleeve in a sleeved manner and is installed on the lug plates, the closed hood is installed on the sides, close to the end portion of the rotating shaft, of the lug plates, and a closed space can be formed between the closed hood and the lug plates to close a gap between the end portion of the rotating shaft and the lug plates. The excavator is internally provided with the excavator stretching and contracting arm. By means of the excavator stretching and contracting arm and the excavator, the technical problem in the prior art that large wear still exists between a pin shaft and the shaft sleeve due to the fact that impurities are prone to entering the space between the shaft sleeve and the pin shaft after penetrating through the gap and a dustproof ring between the lug platesand the pin shaft along with water flow in the axial direction of the pin shaft when the excavator works underwater is alleviated.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to an excavator telescopic arm and an excavator. Background technique [0002] The telescopic arm of the excavator includes a bucket and an arm for supporting the bucket, and the arm and the bucket are hinged together through a pin. The specific hinge method between the stick and the bucket is as follows: Weld two ear plates on the bucket, and set perforations on the ear plates. A shaft sleeve is arranged on the bucket rod, and the shaft sleeve of the bucket rod is placed between two lug plates, and the shaft sleeve and the perforations on the lug plates are connected in sequence. Then install the pin shaft between the perforation on the axle sleeve and the ear plate, so that the pin shaft can rotate in the axle sleeve. [0003] Excavators are often in a dusty and harsh working environment. Impurities entering between the pin shaft and the bushing will aggravate the...

Claims

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Application Information

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IPC IPC(8): E02F3/36E02F3/38
CPCE02F3/369E02F3/38
Inventor 吕建平涂晓丹王冬冬
Owner SHANGHAI SANY HEAVY IND