阅读说明：本技术 挖掘机伸缩臂和挖掘机 (Excavator telescopic arm and excavator ) 是由 吕建平 涂晓丹 王冬冬 于 2019-09-25 设计创作，主要内容包括：本发明提供一种挖掘机伸缩臂和挖掘机,涉及施工机械领域。该挖掘机伸缩臂包括斗杆、铲斗和密闭罩,斗杆的其中一端与铲斗之间通过轴套、转轴和耳板转动连接,转轴套接在轴套中,并安装在耳板上。密闭罩安装在耳板上靠近转轴的端部的一侧上,密闭罩和耳板之间能够形成密闭的空间,以封闭转轴的端部与耳板之间的缝隙。该挖掘机中设置有上述挖掘机伸缩臂。本发明缓解了现有技术中挖掘机在水下作业时,杂质易随着水流沿着销轴的轴向穿过耳板和销轴之间的间隙和防尘圈后进入到轴套和销轴之间,导致销轴和轴套之间仍旧会受到较大的磨损的技术问题。(The invention provides an excavator telescopic arm and an excavator, and relates to the field of construction machinery. The telescopic arm of the excavator comprises a bucket rod, a bucket and a closed cover, wherein one end of the bucket rod is rotatably connected with the bucket through a shaft sleeve, a rotating shaft and an ear plate, and the rotating shaft is sleeved in the shaft sleeve and is arranged on the ear plate. The closed cover is arranged on one side of the end part of the lug plate close to the rotating shaft, and a closed space can be formed between the closed cover and the lug plate so as to close a gap between the end part of the rotating shaft and the lug plate. The excavator is provided with the excavator telescopic arm. The invention solves the technical problem that impurities easily pass through the gap between the lug plate and the pin shaft and the dust ring along the axial direction of the pin shaft and then enter between the shaft sleeve and the pin shaft along with water flow when an excavator works underwater in the prior art, so that the pin shaft and the shaft sleeve still suffer from large abrasion.)

1. The telescopic arm of the excavator is characterized by comprising a bucket rod (1), a bucket and a closed cover (4);

one end of the bucket rod (1) is rotatably connected with the bucket through a shaft sleeve (10), a rotating shaft (3) and an ear plate (2), and the rotating shaft (3) is sleeved in the shaft sleeve (10) and is installed on the ear plate (2);

airtight cover (4) are installed be close to on otic placode (2) on one side of the tip of pivot (3), airtight cover (4) with can form inclosed space between otic placode (2), in order to seal the tip of pivot (3) with gap between otic placode (2).

2. The excavator telescopic arm of claim 1, further comprising an annular first seal (5);

the shaft sleeve (10) is arranged at one end of the bucket rod (1) which is rotatably connected with the bucket, the bucket is provided with two lug plates (2), and the shaft sleeve (10) is positioned between the two lug plates (2);

the first sealing element (5) is sleeved on the rotating shaft (3) and abutted between one side, close to the lug plate (2), of the bucket rod (1) and the lug plate (2).

3. The excavator telescopic arm according to claim 2, characterized in that said containment hood (4) comprises a support hood (40) and a flap (41);

the supporting cover (40) is a hollow cylinder with openings at two ends, the supporting cover (40) is sleeved outside the rotating shaft (3), and one end of the supporting cover (40) is welded on one side of the lug plate (2) departing from the shaft sleeve (10);

the other end of the supporting cover (40) is detachably connected with the baffle (41), and the baffle (41) is used for sealing the opening at the other end of the supporting cover (40).

4. The excavator telescopic arm according to claim 3, characterized in that said containment hood (4) further comprises an annular second seal (42);

an annular first groove (400) is formed in one end, close to the baffle plate (41), of the supporting cover (40), the second sealing element (42) is installed in the first groove (400), and the second sealing element (42) abuts between one side, close to the rotating shaft (3), of the baffle plate (41) and the first groove (400).

5. The excavator telescopic arm according to claim 4, characterized in that the end of the support hood (40) near the apron (41) is bolted to the apron (41), and the second seal (42) is located between the bolts and the hollow position of the support hood (40).

6. The excavator telescopic arm of claim 3, further comprising an annular third seal (6);

an annular second groove (100) is formed in the hollow position of the end portion of the shaft sleeve (10), the third sealing element (6) is installed in the second groove (100), and the third sealing element (6) abuts between the second groove (100) and the rotating shaft (3).

7. The excavator telescopic arm according to claim 6, characterized in that the side of the ear plate (2) close to the bushing (10) is provided with an annular third groove in which the third seal (6) is mounted.

8. The telescopic arm of the excavator as claimed in any one of claims 3 to 7, further comprising a first hollow cylindrical fixing member (7), wherein the first fixing member (7) is sleeved on the rotating shaft (3), and the first fixing member (7) is fixed on one side of the lug plate (2) close to the shaft sleeve (10);

the end part of the shaft sleeve (10) is abutted against the first fixing piece (7); the first sealing element (5) is sleeved on the outer side of the first fixing element (7).

9. The telescopic arm of the excavator as claimed in claim 8, further comprising a second hollow cylindrical fixing member (8), wherein the second fixing member (8) is sleeved on the rotating shaft (3), and the second fixing member (8) is fixed on the side of the ear plate (2) away from the shaft sleeve (10);

the supporting cover (40) is sleeved on the outer side of the second fixing piece (8).

10. An excavator, wherein an excavator telescopic arm as claimed in any one of claims 1 to 9 is provided in the excavator.

Technical Field

The invention relates to the technical field of construction machinery, in particular to an excavator telescopic arm and an excavator.

Background

The telescopic arm of the excavator comprises a bucket and a bucket rod for supporting the bucket, and the bucket rod and the bucket are hinged together through a pin shaft. The specific hinging mode between the bucket rod and the bucket is as follows: two lug plates are welded on the bucket, and through holes are arranged on the lug plates. The shaft sleeve is arranged on the bucket rod, the shaft sleeve of the bucket rod is arranged between the two lug plates, and the shaft sleeve is communicated with the through holes in the lug plates in sequence. Then, a pin shaft is arranged between the shaft sleeve and the through hole on the lug plate, so that the pin shaft can rotate in the shaft sleeve.

The excavator is often in the abominable operational environment that dust flies upward, because impurity gets into can aggravate the wearing and tearing between round pin axle and the axle sleeve behind round pin axle and the axle sleeve, and then can reduce the life of the flexible arm of excavator, therefore the flexible arm of current excavator still includes the dust ring, and the dust ring sets up in the tip position department of axle sleeve, and is located between round pin axle and the axle sleeve.

However, when the excavator is used for underwater operation, such as underwater dredging and underwater sand digging, the telescopic arm of the excavator can stir impurities such as water and sediment, and the impurities such as the sediment can easily penetrate through the gap between the lug plate and the pin shaft along the axial direction of the pin shaft along with water flow and enter the gap between the shaft sleeve and the pin shaft after penetrating through the dust ring. Therefore, impurities can still easily enter between the pin shaft and the shaft sleeve in the telescopic arm of the existing excavator to cause large abrasion, and the service life of the telescopic arm can still be reduced.

Disclosure of Invention

The invention aims to provide an excavator telescopic arm and an excavator, and aims to solve the technical problems that impurities easily penetrate through a clearance between a bucket ear plate and a pin shaft along the axial direction of the pin shaft between a bucket and a bucket rod along with water flow and then continuously penetrate through a dust ring and enter between a shaft sleeve and the pin shaft on the bucket rod when the excavator telescopic arm of the excavator works underwater in the prior art, so that the pin shaft and the shaft sleeve are still subjected to large abrasion, and the service life of the excavator telescopic arm is shortened.

The excavator telescopic arm provided by the invention comprises a bucket rod, a bucket and a closed cover;

one end of the bucket rod is rotatably connected with the bucket through a shaft sleeve, a rotating shaft and an ear plate, and the rotating shaft is sleeved in the shaft sleeve and is arranged on the ear plate;

the closed cover is arranged on one side of the end part of the lug plate close to the rotating shaft, and a closed space can be formed between the closed cover and the lug plate so as to close a gap between the end part of the rotating shaft and the lug plate.

Further, the excavator telescopic arm also comprises an annular first sealing element;

the shaft sleeve is arranged at one end of the bucket rod, which is rotatably connected with the bucket, the bucket is provided with two lug plates, and the shaft sleeve is positioned between the two lug plates;

the first sealing element is sleeved on the rotating shaft and abutted between one side of the bucket rod close to the lug plate and the lug plate.

Further, the closed cover comprises a supporting cover and a baffle;

the supporting cover is a hollow cylinder with openings at two ends, the supporting cover is sleeved outside the rotating shaft, and one end of the supporting cover is welded on one side of the lug plate, which is far away from the shaft sleeve;

the other end of the supporting cover is detachably connected with a baffle plate, and the baffle plate is used for sealing the opening at the other end of the supporting cover.

Further, the closed cover also comprises an annular second sealing element;

one end of the supporting cover close to the baffle is provided with an annular first groove, the second sealing element is installed in the first groove, and the second sealing element is abutted between one side of the baffle close to the rotating shaft and the first groove.

Further, one end of the support cover close to the baffle is connected with the baffle through a bolt, and a second sealing piece is located between the hollow position of the support cover and the bolt.

Further, the excavator telescopic arm also comprises an annular third sealing element;

an annular second groove is formed in the hollow position of the end portion of the shaft sleeve, a third sealing element is installed in the second groove, and the third sealing element abuts between the second groove and the rotating shaft.

Furthermore, an annular third groove is formed in one side, close to the shaft sleeve, of the lug plate, and a third sealing element is installed in the third groove.

Furthermore, the excavator telescopic arm also comprises a hollow cylindrical first fixing piece, the first fixing piece is sleeved on the rotating shaft, and the first fixing piece is fixed on one side, close to the shaft sleeve, of the lug plate;

the end part of the shaft sleeve is abutted against the first fixing piece; the first sealing element is sleeved on the outer side of the first fixing element.

Furthermore, the excavator telescopic arm also comprises a hollow cylindrical second fixing piece, the second fixing piece is sleeved on the rotating shaft, and the second fixing piece is fixed on one side of the lug plate, which is far away from the shaft sleeve;

the supporting cover is sleeved on the outer side of the second fixing piece.

The excavator provided by the invention is provided with the excavator telescopic arm in any one of the technical schemes.

The excavator telescopic arm and the excavator provided by the invention can produce the following beneficial effects:

the invention provides an excavator telescopic arm which comprises a bucket rod, a bucket and a closed cover. When the flexible arm of excavator carries out the operation under water, if when desilting under water and dredging under water, the flexible arm of excavator can stir impurity such as water and silt, and impurity such as silt can flow along with rivers along each direction this moment. Because the closed cover is arranged in the telescopic arm of the excavator, the closed cover is arranged on one side, close to the end part of the rotating shaft, of the lug plate, a closed space can be formed between the closed cover and the lug plate, the closed space can cover a gap between the end part of the rotating shaft and the lug plate, water flow carrying impurities can be prevented from passing through the gap between the lug plate and the rotating shaft along the axial direction of the rotating shaft from the end part of the rotating shaft, and the water flow carrying the impurities can be prevented from entering between the shaft sleeve and the rotating shaft after passing through the dust ring.

Compared with the prior art, the excavator telescopic arm provided by the invention can prevent water flow carrying impurities from entering a gap between the perforation of the lug plate and the rotating shaft along the axial direction of the rotating shaft by using the closed cover, so that the amount of the impurities entering between the shaft sleeve and the rotating shaft after passing through the dust ring can be reduced, the abrasion between the rotating shaft and the shaft sleeve in the excavator telescopic arm is reduced, and the service life of the excavator telescopic arm is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a cross-sectional view of a telescopic boom of an excavator according to a first embodiment of the present invention.

Icon: 1-a bucket rod; 10-shaft sleeve; 100-a second groove; 2-ear plate; 3-a rotating shaft; 4-sealing cover; 40-a support cage; 400-a first groove; 41-a baffle plate; 42-a second seal; 5-a first seal; 6-a third seal; 7-a first fixing member; 8-second fixing piece.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.