CN110616756A - Excavator telescopic arm and excavator - Google Patents
Excavator telescopic arm and excavator Download PDFInfo
- Publication number
- CN110616756A CN110616756A CN201910916249.XA CN201910916249A CN110616756A CN 110616756 A CN110616756 A CN 110616756A CN 201910916249 A CN201910916249 A CN 201910916249A CN 110616756 A CN110616756 A CN 110616756A
- Authority
- CN
- China
- Prior art keywords
- excavator
- telescopic arm
- rotating shaft
- shaft sleeve
- bucket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims description 62
- 239000012535 impurity Substances 0.000 abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 27
- 239000000428 dust Substances 0.000 abstract description 12
- 238000005299 abrasion Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/369—Devices to connect parts of a boom or an arm
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
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.
Description
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.
The first embodiment is as follows:
as shown in fig. 1, the excavator telescopic boom provided by this embodiment includes an arm 1, a bucket, and a sealing cover 4, wherein one end of the arm 1 is rotatably connected to 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 mounted on the ear plate 2. The sealing cover 4 is installed on one side of the ear plate 2 near the end of the rotating shaft 3, and a sealed space can be formed between the sealing cover 4 and the ear plate 2 to seal the gap between the end of the rotating shaft 3 and the ear plate 2.
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 be provided with airtight cover 4 in the excavator telescopic boom that this embodiment provided, airtight cover 4 is installed on the otic placode 2 and is close to the one side of the tip of pivot 3, can form inclosed space between airtight cover 4 and the otic placode 2, this airtight space can cover the gap between the tip of pivot 3 and the otic placode 2, and then can block the rivers that carry impurity and pass the gap between otic placode 2 and the pivot 3 along the axial of pivot 3 from the tip of pivot 3, can prevent to carry impurity's rivers and enter into between axle sleeve 10 and the pivot 3 after passing the dust ring.
Compared with the prior art, the excavator telescopic boom that this embodiment provided utilizes airtight cover 4 can block the rivers that carry impurity and enter into the aperture between the perforation department of otic placode 2 and the pivot 3 along the axial of pivot 3 in, and then can reduce and pass the impurity volume that enters into between axle sleeve 10 and the pivot 3 behind the dust ring, reduces the wearing and tearing between pivot 3 and the axle sleeve 10 in the excavator telescopic boom, prolongs excavator telescopic boom's life.
Therefore, the excavator telescopic boom provided by the embodiment alleviates the technical problem that when the excavator telescopic boom of an excavator in the prior art works underwater, impurities easily pass through the gap between the bucket ear plate 2 and the pin shaft along the axial direction of the pin shaft between the bucket and the bucket rod 1 along with water flow, continuously pass through the dust ring and enter the shaft sleeve 10 on the bucket rod 1 and the pin shaft, so that the pin shaft and the shaft sleeve 10 still can be greatly abraded, and the service life of the excavator telescopic boom is shortened.
Wherein, the rotating shaft 3 can be a pin shaft.
As shown in fig. 1, the excavator telescopic arm provided by the embodiment further includes a ring-shaped first sealing member 5, a shaft sleeve 10 is disposed on one end of the arm 1 rotatably connected with the bucket, two lug plates 2 are disposed on the bucket, and the shaft sleeve 10 is located between the two lug plates 2. The first sealing element 5 is sleeved on the rotating shaft 3 and abutted between one side of the bucket rod 1 close to the lug plate 2 and the lug plate 2.
Wherein, the first sealing member 5 can be a rubber ring or a silica gel ring.
First sealing member 5 can prevent that rivers that carry impurity from entering into the tip of pivot 3 and the gap between the otic placode 2 after passing the gap between the side of dipper 1 and the otic placode 2, and then can prevent that rivers that carry impurity from entering into between pivot 3 and the axle sleeve 10.
It can be seen that the first sealing element 5 can further prevent water flow from sending impurities between the rotating shaft 3 and the shaft sleeve 10, reduce abrasion between the rotating shaft 3 and the shaft sleeve 10, and further prolong the service life of the telescopic arm of the excavator.
First sealing member 5 and the cooperation of closing cover 4 are used and can be reduced and enter into the impurity volume between pivot 3 and the axle sleeve 10 along with rivers, can strengthen the guard effect, reduce the damage that the flexible arm of excavator received because of impurity.
In order to improve the sealing effect of the first sealing member 5, the first sealing member 5 is preferably interference-fitted between the side of the stick 1 close to the lug plate 2 and the lug plate 2.
As shown in fig. 1, the enclosure 4 provided in this embodiment includes a supporting cover 40 and a baffle 41, the supporting cover 40 is a hollow cylinder with openings at two ends, the supporting cover 40 is sleeved on the outer side of the rotating shaft 3, and one end of the supporting cover 40 is welded on the side of the ear plate 2 away from the shaft sleeve 10. A shutter 41 is detachably attached to the other end of the support cover 40, and the shutter 41 is used to close the opening of the other end of the support cover 40.
In practical applications, the enclosure 4 may be a hollow cylinder with only one opening, and the side of the enclosure 4 with the opening may be welded to the ear plate 2. Wherein, integrated into one piece's airtight cover 4 and welded connected mode all can play the effect of the tip of closed pivot 3, can furthest block rivers, prevent that rivers from carrying impurity and entering into in the gap between pivot 3 and otic placode 2.
However, the integrally formed enclosure 4 and the welded connection may increase the difficulty of assembling the telescopic arm of the excavator and the difficulty of replacing the bucket, so that the enclosure 4 of the present embodiment preferably includes a support cover 40 and a baffle 41, and the baffle 41 is detachably connected to the support cover 40.
The material of the support cover 40 and the material of the baffle plate 41 are not limited, the material of the support cover 40 and the material of the baffle plate 41 can be metal or alloy, and the support cover 40 is welded on the ear plate 2. To facilitate the removal of the shaft 3 from between the ear plates 2, the shield 41 is detachably attached to the support housing 40. To prevent the water flow from entering the inside of the support cover 40 and entering the gap between the rotary shaft 3 and the ear plate 2, the baffle plate 41 abuts on one end of the support cover 40 away from the ear plate 2.
As shown in fig. 1, the enclosure 4 further includes an annular second seal 42. An annular first groove 400 is provided on an end of the support cover 40 close to the baffle plate 41, the second seal member 42 is mounted in the first groove 400, and the second seal member 42 abuts between a side of the baffle plate 41 close to the rotary shaft 3 and the first groove 400.
Because the support cover 40 and the baffle plate 41 are detachably connected, a gap which can be entered by water flow exists between the support cover 40 and the baffle plate 41. The second sealing member 42 abutting between the side of the baffle plate 41 close to the rotating shaft 3 and the first groove 400 can block the water flow, and prevent the water flow carrying impurities from entering the gap between the rotating shaft 3 and the ear plate 2 after passing through the gap between the support cover 40 and the baffle plate 41.
The second sealing element 42 can also be a rubber ring or a silica gel ring, and the second sealing element 42 can also prevent water flow from sending impurities into the space between the rotating shaft 3 and the shaft sleeve 10, so that the abrasion between the rotating shaft 3 and the shaft sleeve 10 is reduced, and the service life of the telescopic arm of the excavator is further prolonged.
In order to enhance the sealing effect of the second sealing member 42, the second sealing member 42 is preferably interference-fitted between the side of the baffle plate 41 close to the rotating shaft 3 and the first groove 400.
In practical applications, the support cover 40 and the baffle plate 41 can be detachably connected together by bolts or rivets. In order to improve the stability of the telescopic arm of the excavator, the support cover 40 and the baffle plate 41 may be connected by bolts.
In the present embodiment, as shown in fig. 1, the end of the support cover 40 near the baffle plate 41 is connected to the baffle plate 41 by bolts, and the second seal member 42 is located between the bolts and the hollow position of the support cover 40.
The second sealing member 42 is disposed between the bolt and the hollow position of the support cover 40, which not only effectively prevents water from entering the support cover 40 through the gap between the support cover 40 and the baffle plate 41, but also eliminates the need to consider the gap between the sealing bolt and the support cover 40 and the gap between the sealing bolt and the baffle plate 41.
Therefore, the second seal 42 can simplify the structure of the enclosure 4 while ensuring the sealability of the enclosure 4.
As shown in fig. 1, the excavator telescopic arm provided in the present embodiment further includes an annular third seal member 6. An annular second groove 100 is provided at a hollow position of an end portion of the sleeve 10, the third sealing member 6 is installed in the second groove 100, and the third sealing member 6 abuts between the second groove 100 and the rotary shaft 3.
The third sealing member 6 may also be a rubber ring or a silicone ring.
The third sealing member 6 may prevent water current with impurities from passing through a gap between an end of the shaft sleeve 10 and a sidewall of the rotating shaft 3, and then may prevent water current with impurities from entering between the rotating shaft 3 and the shaft sleeve 10.
It can be seen that the third sealing element 6 can further prevent water flow from sending impurities between the rotating shaft 3 and the shaft sleeve 10, reduce abrasion between the rotating shaft 3 and the shaft sleeve 10, and further prolong the service life of the telescopic arm of the excavator.
First sealing member 5, second sealing member 42, third sealing member 6 and the cooperation of sealed cover 4 use can a large amount of reductions along with rivers enter into the impurity volume between pivot 3 and the axle sleeve 10, play the guard effect of preferred, reduce the damage that the flexible arm of excavator received because of impurity.
In order to enhance the sealing effect of the third sealing member 6, the third sealing member 6 is preferably interference-fitted between the second groove 100 and the rotating shaft 3 in this embodiment.
Further, the lug plate 2 is provided with an annular third recess on the side thereof adjacent the boss 10, in which third recess the third seal 6 is mounted.
The third groove and the second groove 100 are matched for use, so that the third sealing element 6 can be stably limited between the end part of the shaft sleeve 10, the lug plate 2 and the side wall of the rotating shaft 3, and the third sealing element 6 can play a good sealing effect.
Further, also for the sealing effect of the third sealing member 6, the present embodiment preferably has the third sealing member 6 interference-fitted with the third groove.
As shown in fig. 1, the excavator telescopic boom provided by this embodiment further includes a hollow cylindrical first fixing member 7, 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 ear plate 2 close to the shaft sleeve 10.
The end of the sleeve 10 is abutted against the first fixing member 7, and the first sealing member 5 is sleeved outside the first fixing member 7.
In practical applications, the material of the first fixing element 7 may also be metal or alloy. The first fixing element 7 can be welded to the lug plate 2 on the side thereof facing the bushing 10, the first fixing element 7 being able to act as a reinforcement for the lug plate 2.
The first fixing member 7 may be a member provided on the ear plate 2 in an existing excavator. The excavator telescopic boom provided by the embodiment is provided with the first sealing element 5 according to the position relation among the lug plate 2, the rotating shaft 3, the shaft sleeve 10, the first fixing element 7 and the bucket rod 1 in the existing excavator telescopic boom, and the first sealing element 5 can be sleeved on the first fixing element 7 and can seal the gap between the side edge of the bucket rod 1 and the lug plate 2.
Wherein, the position of first sealing member 5 can be stabilized in the cooperation of first mounting 7 upper and dipper 1 and otic placode 2, promotes the stability of the flexible arm of excavator.
As shown in fig. 1, the excavator telescopic arm provided in this embodiment may further include a hollow cylindrical second fixing member 8, the second fixing member 8 is sleeved on the rotating shaft 3, and the second fixing member 8 is fixed on a side of the ear plate 2 away from the shaft sleeve 10. The supporting cover 40 is sleeved outside the second fixing member 8.
In practical applications, the material of the second fixing member 8 may be metal or alloy, and the second fixing member 8 may be a member provided on the ear plate 2 in the existing excavator.
The second fixing element 8 is welded to the lug plate 2 on the side thereof facing the sleeve 10, the second fixing element 8 also serving to reinforce the lug plate 2.
Example two:
the excavator provided by the embodiment is provided with the excavator telescopic arm in the first embodiment, so that the excavator provided by the embodiment can solve the same technical problems and achieve the same beneficial effects as the excavator telescopic arm in the first embodiment.
The excavator that this embodiment provided has alleviated the excavator that exists among the prior art equally when the flexible arm of excavator carries out the operation under water, impurity easily passes the clearance between scraper bowl otic placode 2 and the round pin axle along the axial of the round pin axle between scraper bowl and the dipper 1 along rivers after, continues to pass the dust ring and enters into between the axle sleeve 10 on the dipper 1 and the round pin axle, leads to still can receive great wearing and tearing between round pin axle and the axle sleeve 10, reduces the technical problem of the flexible arm's of excavator life.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916249.XA CN110616756A (en) | 2019-09-25 | 2019-09-25 | Excavator telescopic arm and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916249.XA CN110616756A (en) | 2019-09-25 | 2019-09-25 | Excavator telescopic arm and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110616756A true CN110616756A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910916249.XA Pending CN110616756A (en) | 2019-09-25 | 2019-09-25 | Excavator telescopic arm and excavator |
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| CN (1) | CN110616756A (en) |
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| CN102943495A (en) * | 2012-11-16 | 2013-02-27 | 柳州柳工挖掘机有限公司 | Hinge mechanism |
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| CN209294200U (en) * | 2018-11-20 | 2019-08-23 | 河南中烟工业有限责任公司 | A kind of shaker arm connection structure |
| CN211037091U (en) * | 2019-09-25 | 2020-07-17 | 上海三一重机股份有限公司 | Excavator telescopic arm and excavator |
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| KR20130092010A (en) * | 2012-02-09 | 2013-08-20 | 김성회 | Linkage structure for bucket and arm of hydraulic excavator |
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