CN110905017A - Bucket clearance adjusting mechanism and excavator - Google Patents
Bucket clearance adjusting mechanism and excavator Download PDFInfo
- Publication number
- CN110905017A CN110905017A CN201911279688.0A CN201911279688A CN110905017A CN 110905017 A CN110905017 A CN 110905017A CN 201911279688 A CN201911279688 A CN 201911279688A CN 110905017 A CN110905017 A CN 110905017A
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- bucket
- excavator
- mounting seat
- elastic piece
- adjusting mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 38
- 238000007789 sealing Methods 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3613—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with means for absorbing any play therebetween
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- 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 a bucket clearance adjusting mechanism and an excavator, and relates to the technical field of excavators. The excavator comprises a bucket rod, a bucket ear plate and a bucket clearance adjusting mechanism; the bucket clearance adjusting mechanism is arranged between the bucket rod and the bucket ear plate and comprises a butting disc, an elastic piece and a mounting seat; one end of the abutting disc abuts against one end of the elastic piece; the other end of the elastic piece is abutted against one end of the mounting seat; the other end of the abutting disc abuts against the end face of the bucket rod; the other end of the mounting seat is connected with the plate surface of the bucket ear plate. Set up the elastic component between butt flange and mount pad, the elastic component can provide the pretightning force, makes butt flange and dipper butt to the clearance that compensation scraper bowl and dipper terminal surface wearing and tearing produced need not the excavator and shut down just can realize the adjustment in scraper bowl clearance, improves work efficiency greatly.
Description
Technical Field
The invention relates to the technical field of excavators, in particular to a bucket clearance adjusting mechanism and an excavator.
Background
The excavator bucket is connected with the bucket rod through the pin shaft, the end face of the bucket rod is in contact with the end face of the bucket in the working and rotating process, after the excavator bucket works for a long time, the abrasion gap of the contact end face is increased, the bucket cannot work normally, and the excavator is required to be stopped at the moment and the gap is adjusted through the adjusting mechanism.
The traditional structure is as follows: the T-shaped sleeve is connected with the pressing sleeve through the bolt, the distance between the T-shaped sleeve and the end face of the bucket rod is changed by adding and subtracting adjusting gaskets, the excavator is required to stop in the process, and the pressing sleeve and the T-shaped sleeve are adjusted by detaching the bolt. The work is accompanied with the whole working process of the excavator, the gap between the T-shaped sleeve and the end face of the bucket rod needs to be observed and checked at any time during the work, and the work efficiency is extremely low.
Disclosure of Invention
The invention aims to provide a bucket clearance adjusting mechanism and an excavator, which can realize the adjustment of a bucket clearance without stopping the excavator and greatly improve the working efficiency.
The embodiment of the invention is realized by the following steps:
a bucket clearance adjusting mechanism comprises a butting disc, an elastic piece and a mounting seat;
one end of the abutting disc abuts against one end of the elastic piece; the other end of the elastic piece is abutted against one end of the mounting seat;
the other end of the abutting disc is used for abutting against the end face of the bucket rod;
the other end of the mounting seat is used for being connected with the plate surface of the bucket ear plate.
In a preferred embodiment of the present invention, in the bucket clearance adjusting mechanism, a first limiting hole for limiting the elastic member is disposed on an end surface of the abutting disc abutting against the elastic member.
The pretightening force can be exerted in the first limiting hole, and the elastic piece can be limited to prevent the elastic piece from moving.
In a preferred embodiment of the present invention, in the bucket clearance adjusting mechanism, a second limiting hole for limiting the elastic member is disposed on an end surface of the mounting seat, which is in contact with the elastic member.
The pretightening force can be exerted in the second limiting hole, and the elastic piece can be limited to prevent the elastic piece from moving.
In a preferred embodiment of the present invention, in the bucket clearance adjusting mechanism, the elastic member is a spring.
The elastic part is preferably a spring, and the spring is convenient to disassemble and assemble and is not easy to lose efficacy.
In a preferred embodiment of the present invention, in the bucket clearance adjusting mechanism, the abutting plate and the mounting seat are positioned by a positioning pin.
In a preferred embodiment of the present invention, in the bucket clearance adjusting mechanism, a first positioning hole is formed in an end surface of the abutting disc abutting against the elastic member; a second positioning hole corresponding to the first positioning hole is formed in the end face, abutted against the elastic piece, of the mounting seat;
the first positioning hole and the second positioning hole are respectively matched with two ends of the elastic piece.
An excavator comprises an arm, a bucket ear plate and the bucket clearance adjusting mechanism;
the bucket rod is connected with the bucket ear plate through a pin shaft;
the bucket clearance adjusting mechanism is sleeved on the pin shaft and is located between the bucket rod and the bucket ear plate.
In a preferred embodiment of the present invention, in the excavator, a dust ring is disposed between the abutting disc and the pin shaft.
Set up the dust ring between butt dish and round pin axle, can prevent effectively that debris such as external silt from getting into the surface of round pin axle, the life of extension part.
In a preferred embodiment of the present invention, in the excavator, a seal ring is disposed at a position where the outer ring of the abutting disc contacts the arm.
The sealing ring is arranged at the position where the outer ring of the butt joint disc is in contact with the bucket rod, so that foreign materials such as external silt can be prevented from entering the end face of the bucket rod, the foreign materials such as external silt can be prevented from entering the surface of the pin shaft, and the service lives of the bucket rod and the pin shaft are prolonged.
In a preferred embodiment of the present invention, in the excavator, the sealing ring is a 0-type sealing ring.
The embodiment of the invention has the beneficial effects that: the invention provides a bucket clearance adjusting mechanism and an excavator, wherein the excavator comprises a bucket rod, a bucket ear plate and a bucket clearance adjusting mechanism; the bucket clearance adjusting mechanism is arranged between the bucket rod and the bucket ear plate and comprises a butting disc, an elastic piece and a mounting seat; one end of the abutting disc abuts against one end of the elastic piece; the other end of the elastic piece is abutted against one end of the mounting seat; the other end of the abutting disc abuts against the end face of the bucket rod; the other end of the mounting seat is connected with the plate surface of the bucket ear plate. Set up the elastic component between butt flange and mount pad, the elastic component can provide the pretightning force, makes butt flange and dipper butt to the clearance that compensation scraper bowl and dipper terminal surface wearing and tearing produced need not the excavator and shut down just can realize the adjustment in scraper bowl clearance, improves work efficiency greatly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a disassembled schematic view of a bucket clearance adjustment mechanism provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a bucket clearance adjustment mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic view of an installation of a bucket clearance adjustment mechanism provided in accordance with an embodiment of the present invention;
fig. 4 is an enlarged view of fig. 3.
In the figure:
1-mounting a base; 2-a spring; 3-a butting disk; 4-a dustproof ring; 5-positioning pins; 6-a gasket; 7-a first bolt; 8-a second bolt; 9-bucket ear plate; 10-a pin shaft; 11-a bucket rod; 12-sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
First embodiment
Referring to fig. 1 and fig. 2, the present embodiment provides a bucket clearance adjusting mechanism, which includes a support plate 3, an elastic member, and a mounting base 1;
one end of the abutting disc 3 abuts against one end of the elastic piece; the other end of the elastic piece is abutted against one end of the mounting seat 1;
the other end of the abutting disc 3 is used for abutting against the end face of the bucket rod 11;
the other end of the mounting base 1 is used for abutting against the plate surface of the bucket ear plate 9.
The bucket and the arm 11 of excavator are usually connected together through round pin axle 10, and the bucket is in the rotatory in-process of work, and 11 terminal surfaces of arm and the contact of bucket otic placode 9, long-time work back, and the contact surface wearing and tearing clearance increases gradually, leads to the bucket can not normally work, needs the excavator this moment to shut down, adjusts the clearance through clearance adjustment mechanism, wastes time and energy and influences the work efficiency of excavator. Traditional clearance adjustment mechanism mainly adopts T type cover and compresses tightly the cover and pass through bolted connection, utilizes the quantity of plus-minus adjusting shim to change the distance of T type cover and 11 terminal surfaces of dipper, and the during needs excavator shut down, dismantles bolt adjustment and compresses tightly cover and T type cover. This work is accompanied with the whole work process of the excavator, and it is necessary to observe and check the clearance between the T-shaped sleeve and the end face of the arm 11 at any time during the work. In actual work, the operator often does not adjust the clearance for not affecting the construction, so that the clearance between the bucket ear plate 9 and the end face of the bucket rod 11 is increased, the sealing performance is poor, and the service life of the bucket rod 11 and the bucket is finally affected.
The bucket clearance adjusting mechanism provided by the embodiment is arranged between a bucket and a bucket rod 11 which are connected through a pin shaft 10, a butt disc 3 and a mounting seat 1 are both sleeved on the pin shaft 10, the end surface of one end, close to the bucket rod 11, of the butt disc 3 is abutted against the end surface of the bucket rod 11, and the end surface, close to a bucket lug plate 9, of the mounting seat 1 is connected with the bucket lug plate 9 through a second bolt 8; the elastic piece sets up between mount pad 1 and butt dish 3, and first bolt 7 passes through the through-hole fastening on mount pad 1 in the screw hole on butt dish 3, and gasket 6 is installed on first bolt 7. The elastic component can provide along the axial pretightning force of round pin axle 10 to the clearance that the wearing and tearing of compensation scraper bowl terminal surface and 11 terminal surfaces of dipper produced, thereby the realization need not to dismantle the clearance that the scraper bowl just can automatic adjustment scraper bowl terminal surface and 11 terminal surfaces of dipper, even need not to shut down, need not manual adjustment in the use and just can guarantee the sealed of scraper bowl and 11 terminal surfaces of being connected of dipper, improves the life of scraper bowl and dipper 11.
In the alternative of this embodiment, the abutting disc 3 is provided with a first limiting hole for limiting the elastic member on the end surface abutted against the elastic member.
In this embodiment, the first limiting hole is a counter bore arranged on the end face of the abutting disc 3, and one end of the elastic element can abut against the bottom wall of the first limiting hole to apply a pre-tightening force along the axial direction of the pin shaft 10; the side wall of the first limiting hole can limit the elastic piece so as to prevent the elastic piece from moving.
It should be emphasized that the aperture and the depth of the first limiting hole are set according to the shape of the end of the elastic member, so as to realize the axial abutment and the radial limiting of the pin shaft 10; the number of the first limiting holes can be one or more, and is determined according to the arrangement position of the elastic piece: when the elastic piece is arranged at the central position of the abutting disc 3 and the mounting seat 1, the number of the first limiting holes is one, and the first limiting holes are arranged in the middle of the abutting disc 3; when the quantity of elastic component has a plurality ofly, and a plurality of elastic component along the circumference equipartition setting of butt flange 3, the quantity in first spacing hole equals with the quantity of elastic component, and a plurality of first spacing holes and a plurality of elastic component one-to-one.
In an alternative scheme of this embodiment, a second limiting hole for limiting the elastic member is provided on an end surface of the mounting base 1 abutting against the elastic member.
The second limiting hole in this embodiment is a counter bore arranged on the end face of the mounting seat 1, and the other end of the elastic element can be abutted against the bottom wall of the second limiting hole to apply a pre-tightening force along the axial direction of the pin shaft 10; the side wall of the second limiting hole can limit the elastic piece so as to prevent the elastic piece from moving.
It should be emphasized that the aperture and the depth of the second limiting hole are set according to the shape of the end of the elastic member, so as to realize the axial abutment and the radial limiting of the pin shaft 10; the number of the second limiting holes can be one or more, and is determined according to the arrangement position of the elastic piece: when the elastic piece is arranged at the central position of the abutting disc 3 and the mounting seat 1, the number of the second limiting holes is one, and the second limiting holes are arranged in the middle of the mounting seat 1; when the quantity of elastic component has a plurality ofly, and a plurality of elastic component set up along the circumference equipartition of mount pad 1, the quantity in the spacing hole of second equals with the quantity of elastic component, and a plurality of spacing holes of second and a plurality of elastic component one-to-one.
In a preferred embodiment of the present invention, in the bucket clearance adjusting mechanism, the elastic member is a spring 2.
The elastic piece of this embodiment is preferably spring 2, and spring 2 easy dismounting is difficult for becoming invalid. The spring 2 may be a wave spring, a belleville spring, or the like. It should be emphasized that the use of the spring 2 as the elastic member is only a preferred mode of the present embodiment, and the elastic member may be replaced by a member made of an elastic material.
In an alternative of this embodiment, the abutment disc 3 is positioned with the mounting 1 by means of a positioning pin 5.
For the simple to operate, in this embodiment, fix a position between butt flange 3 and mount pad 1 through locating pin 5.
In the above technical solution, further, a first positioning hole is provided on an end surface of the abutting disc 3 abutting against the elastic member; a second positioning hole corresponding to the first positioning hole is formed in the end face, abutted against the elastic piece, of the mounting seat 1;
the first positioning hole and the second positioning hole are respectively matched with two ends of the elastic piece.
Specifically, the number of the first positioning holes and the second positioning holes may be one or more. The more the first positioning holes and the second positioning holes, the better the positioning effect, the preferred number of the first positioning holes and the second positioning holes is two, the two first positioning holes are arranged along the radial direction of the abutting disc 3 and symmetrically about the axis of the abutting disc 3, the two second positioning holes are arranged along the radial direction of the mounting seat 1 and symmetrically about the axis of the mounting seat 1, the positioning effect can be ensured by the arrangement mode of the first positioning holes and the second positioning holes, and meanwhile, the machining processes are reduced to the maximum extent.
Second embodiment
Referring to fig. 3 and 4, the present embodiment provides an excavator, which includes a dipper 11, a bucket ear 9, and a bucket clearance adjusting mechanism according to the first embodiment;
the bucket rod 11 is connected with the bucket ear plate 9 through a pin shaft 10;
the bucket clearance adjusting mechanism is sleeved on the pin shaft 10 and is located between the bucket rod 11 and the bucket ear plate 9.
The excavator of the embodiment comprises a bucket rod 11 and a bucket, wherein a bucket ear plate 9 is arranged on the bucket, the bucket and the bucket ear plate 9 are connected together through a pin shaft 10, a bucket gap adjusting mechanism is arranged between the bucket and the bucket rod 11 which are connected through the pin shaft 10, a butting disc 3 and an installation seat 1 are sleeved on the pin shaft 10, the end surface of one end, close to the bucket rod 11, of the butting disc 3 is butted with the end surface of the bucket rod 11, and the end surface of one end, close to the bucket ear plate 9, of the installation seat 1 is butted with the bucket ear plate 9; the elastic component sets up between mount pad 1 and butt dish 3, and the elastic component can provide the axial pretightning force along round pin axle 10 to the clearance that compensation scraper bowl terminal surface and 11 terminal surface wearing and tearing of dipper produced, thereby realize need not to dismantle the clearance that the scraper bowl just can automatic adjustment scraper bowl terminal surface and 11 terminal surfaces of dipper, even need not to shut down in the use, need not manual adjustment just can guarantee the sealed of scraper bowl and 11 terminal surfaces of being connected of dipper, improve scraper bowl and 11 life of dipper.
In an alternative of this embodiment, a dust ring 4 is provided between the abutting disc 3 and the pin 10.
Set up dust ring 4 between butt dish 3 and round pin axle 10, can prevent effectively that debris such as external silt from getting into the surface of round pin axle 10, the life of extension part.
In the above technical solution, further, a sealing ring 12 is disposed at a position where the outer ring of the abutting disc 3 contacts the arm 11.
Set up sealing washer 12 in the position of the outer lane of abutting disk 3 and the contact of dipper 11, not only can prevent that debris such as external silt from entering into the terminal surface of dipper 11, can also prevent that debris such as external silt from entering into the surface of round pin axle 10, extension dipper 11 and round pin axle 10's life. In this embodiment, the sealing ring 12 is preferably a 0-type sealing ring, which has good sealing effect and low cost.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A bucket clearance adjusting mechanism is characterized by comprising a butting disc, an elastic piece and a mounting seat;
one end of the abutting disc abuts against one end of the elastic piece; the other end of the elastic piece is abutted against one end of the mounting seat;
the other end of the abutting disc is used for abutting against the end face of the bucket rod;
the other end of the mounting seat is used for being connected with the plate surface of the bucket ear plate.
2. The bucket clearance adjusting mechanism of claim 1, wherein a first limiting hole for limiting the elastic member is provided on an end surface of the abutting disc abutting against the elastic member.
3. The bucket clearance adjustment mechanism of claim 1, wherein a second limiting hole for limiting the elastic member is provided in an end surface of the mounting seat that abuts against the elastic member.
4. The bucket clearance adjustment mechanism of claim 1, wherein the resilient member is a spring.
5. The bucket clearance adjustment mechanism of claim 1, wherein the abutment plate and the mounting block are positioned by a locating pin.
6. The bucket clearance adjustment mechanism of claim 5, wherein a first positioning hole is provided in an end surface of the abutting disc abutting against the elastic member; a second positioning hole corresponding to the first positioning hole is formed in the end face, abutted against the elastic piece, of the mounting seat;
the first positioning hole and the second positioning hole are respectively matched with two ends of the elastic piece.
7. An excavator comprising a stick, a bucket ear, and a bucket clearance adjustment mechanism as claimed in any one of claims 1 to 6;
the bucket rod is connected with the bucket ear plate through a pin shaft;
the bucket clearance adjusting mechanism is sleeved on the pin shaft and is located between the bucket rod and the bucket ear plate.
8. The excavator of claim 7 wherein a dust ring is disposed between the interface disc and the pin.
9. The excavator of claim 7 wherein the outer race of the interface pan is provided with a sealing ring at the point of contact with the stick.
10. The excavating machine of claim 9 wherein the seal is an O-ring seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911279688.0A CN110905017A (en) | 2019-12-12 | 2019-12-12 | Bucket clearance adjusting mechanism and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911279688.0A CN110905017A (en) | 2019-12-12 | 2019-12-12 | Bucket clearance adjusting mechanism and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110905017A true CN110905017A (en) | 2020-03-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911279688.0A Pending CN110905017A (en) | 2019-12-12 | 2019-12-12 | Bucket clearance adjusting mechanism and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110905017A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111391652A (en) * | 2020-05-12 | 2020-07-10 | 三一重机有限公司 | Clearance adjustment structure and engineering machine tool |
| CN111622284A (en) * | 2020-06-24 | 2020-09-04 | 三一重机有限公司 | Clearance adjustment mechanism and excavator |
| CN113445557A (en) * | 2021-07-27 | 2021-09-28 | 三一重机有限公司 | Bucket clearance compensation structure |
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| KR20100134335A (en) * | 2009-06-15 | 2010-12-23 | 볼보 컨스트럭션 이큅먼트 에이비 | Connector device of arm and bucket with possibility gap compensation of excavator |
| CN202181563U (en) * | 2011-07-08 | 2012-04-04 | 三一重机有限公司 | Novel connecting structure of bucket rod of bucket |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111391652A (en) * | 2020-05-12 | 2020-07-10 | 三一重机有限公司 | Clearance adjustment structure and engineering machine tool |
| CN111622284A (en) * | 2020-06-24 | 2020-09-04 | 三一重机有限公司 | Clearance adjustment mechanism and excavator |
| CN113445557A (en) * | 2021-07-27 | 2021-09-28 | 三一重机有限公司 | Bucket clearance compensation structure |
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