CN113477628A - Bulldozer shovel blade assembly convenient to disassemble and assemble - Google Patents

Bulldozer shovel blade assembly convenient to disassemble and assemble Download PDF

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Publication number
CN113477628A
CN113477628A CN202110697492.4A CN202110697492A CN113477628A CN 113477628 A CN113477628 A CN 113477628A CN 202110697492 A CN202110697492 A CN 202110697492A CN 113477628 A CN113477628 A CN 113477628A
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CN
China
Prior art keywords
block
fixed mounting
piece
blade assembly
mounting
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.)
Granted
Application number
CN202110697492.4A
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Chinese (zh)
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CN113477628B (en
Inventor
周汝宝
屠积
米志勇
戚定元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gaoyou Schindler Construction Machinery Group Co ltd
Original Assignee
Gaoyou Schindler Construction Machinery Group Co ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Gaoyou Schindler Construction Machinery Group Co ltd filed Critical Gaoyou Schindler Construction Machinery Group Co ltd
Priority to CN202110697492.4A priority Critical patent/CN113477628B/en
Publication of CN113477628A publication Critical patent/CN113477628A/en
Application granted granted Critical
Publication of CN113477628B publication Critical patent/CN113477628B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80Component parts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80Component parts
    • E02F3/815Blades; Levelling or scarifying tools
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80Component parts
    • E02F3/815Blades; Levelling or scarifying tools
    • E02F3/8152Attachments therefor, e.g. wear resisting parts, cutting edges

Abstract

The invention relates to a bulldozer scraper knife assembly convenient to disassemble and assemble, which comprises a scraper knife body, a disassembling and assembling mechanism and a knocking mechanism, wherein the disassembling and assembling mechanism and the knocking mechanism are both arranged on the right side of the scraper knife body, the knocking mechanism is arranged above the disassembling and assembling mechanism, the disassembling and assembling mechanism comprises a fixed plate, a butt joint block and two mounting plates II, a cover body is fixedly arranged on the left side of the fixed plate, a limiting block spliced with the butt joint block is fixedly arranged on the left side of the cover body, a driving motor is fixedly arranged on the right side of the fixed plate, an output shaft of the driving motor is fixedly connected with a shaft rod, the knocking mechanism comprises a transverse block, a vertical rod is hinged to the inner side of the transverse block, a knocking hammer is fixedly arranged on the left side of the vertical rod, and a first hinged block is fixedly arranged at the top of the transverse block. This bull-dozer spiller assembly convenient to dismouting through the dismouting mechanism that sets up can make the dismouting process simple and convenient more, labour saving and time saving, the maintenance of being convenient for to maintenance efficiency has been improved.

Description

Bulldozer shovel blade assembly convenient to disassemble and assemble
Technical Field
The invention relates to the technical field of bulldozer accessories, in particular to a bulldozer scraper assembly convenient to disassemble and assemble.
Background
A bulldozer is an earthwork machine which can excavate, transport and discard rock and soil, and has wide application in open-pit mines, such as construction of a dumping field, leveling of a car dumping field, accumulation of scattered rocks, leveling of a working plate, a construction site and the like, and not only can be used for auxiliary work, but also can be used for main mining work, such as stripping and mining of a sand deposit, traction and boosting of a scraper and a plough.
According to the bulldozer for road construction provided by the invention CN 108252345A granted by China, the bulldozer has the advantages that the bulldozer is simple in structure and high in working efficiency, but the bulldozer cannot quickly disassemble a scraper knife assembly of the bulldozer, when the scraper knife assembly is damaged, the scraper knife assembly is difficult to disassemble and assemble and is inconvenient to maintain, and further the maintenance efficiency is reduced, and in addition, certain wet materials in the shoveled soil of the bulldozer can be adhered to the inner wall of the scraper knife and need to be manually cleaned, so that the use effect is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the bulldozer scraper knife assembly convenient to disassemble and assemble, which has the advantages of convenience in disassembly and assembly and the like, and solves the problem that the scraper knife assembly of the existing bulldozer is inconvenient to disassemble and assemble for maintenance.
In order to achieve the purpose, the invention provides the following technical scheme: a bulldozer shovel blade assembly convenient to disassemble and assemble comprises a shovel blade body, a disassembling and assembling mechanism and a knocking mechanism;
the dismounting mechanism and the knocking mechanism are both arranged on the right side of the scraper knife body, and the knocking mechanism is arranged above the dismounting mechanism;
the disassembly and assembly mechanism comprises a fixed plate, a butt joint block and two second mounting plates, a cover body is fixedly mounted on the left side of the fixed plate, a limiting block spliced with the butt joint block is fixedly mounted on the left side of the cover body, a driving motor is fixedly mounted on the right side of the fixed plate, and an output shaft of the driving motor is fixedly connected with a shaft lever;
the knocking mechanism comprises a transverse block, the inner side of the transverse block is hinged with a vertical rod, a knocking hammer is fixedly mounted on the left side of the vertical rod, and a first hinged block is fixedly mounted at the top of the transverse block.
Further, the outside fixed mounting of axostylus axostyle has a gear, two the mounting panel all with spiller body fixed connection with the butt joint piece, the left side wall fixed mounting of the cover body has a bearing piece No. one, the left end of axostylus axostyle runs through a gear and extends to the inboard of a bearing piece No. one.
Furthermore, the top and the bottom of a tooth piece all mesh and have two No. two gears, the inboard fixedly connected with connecting rod of No. two gears, the one end fixedly connected with screw rod that No. two gears were kept away from to the connecting rod.
Further, the outside threaded connection of screw rod has the spiral shell piece, the right side fixedly connected with slide bar of spiral shell piece, two spouts have been seted up in the left side of fixed plate, the inside sliding connection of spout has the slider, slide bar and slider fixed connection.
Further, the left side fixed mounting of spiral shell piece has the connecting block, two the equal fixed mounting in the back of the body one side of connecting block has the post of inserting, the left side fixed mounting of fixed plate has two mounting panels No. one.
Further, the jack has all been seted up with the bottom of No. two mounting panels to a mounting panel the equal fixed mounting in relative one side of a mounting panel has No. two bearing blocks, the one end fixed mounting that the connecting rod was kept away from to the screw rod is in the inboard of No. two bearing blocks.
Further, the top and the bottom of the cover body are both provided with round holes, the inner side of each round hole is fixedly provided with a third bearing block, and the connecting rod is fixedly arranged on the inner side of the third bearing block.
Further, the inboard of articulated piece articulates there is electric putter, the right side fixed mounting of montant has articulated piece No. two, electric putter's flexible end articulates in the inside of articulated piece No. two.
Further, the transverse block is fixedly installed on the left side of the fixing plate, the knocking hammer is made of carbon steel, and the inserting column is inserted into the inserting hole.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
1. this bull-dozer spiller assembly convenient to dismouting, make a mounting panel and No. two mounting panel positions fix a position through pegging graft the stopper with the butt joint piece, then can make two spiral shell pieces do the removal that is close to each other or keeps away from each other simultaneously through the driving motor who sets up again, the spiral shell piece drives the post of inserting that the connecting block is connected and moves into and peg graft in the jack, and then accomplish the installation of spiller body and fixed plate, can make two posts of inserting shift out from the jack through driving motor reversal during the dismouting, this dismouting process is simple and convenient, time saving and labor saving, the maintenance of being convenient for, and then maintenance efficiency has been improved.
2. This bull-dozer spiller assembly convenient to dismouting, through articulated piece No. two that set up, electric putter and articulated piece with articulate under the inboard montant cooperation of horizontal block, when electric putter's flexible end removed, can adjust the angle of montant, and then can make to strike the hammering and beat the spiller body and can knock off the material that remains on the wall, it is more convenient to use to the result of use has been improved.
Drawings
FIG. 1 is a schematic structural view of a bulldozer blade assembly of the present invention, shown disassembled and assembled;
FIG. 2 is a schematic structural view of a disassembly and assembly mechanism of a bulldozer blade assembly of the present invention, which facilitates disassembly and assembly;
FIG. 3 is a schematic structural view of a striking mechanism of a bulldozer blade assembly of the present invention, shown disassembled and assembled.
In the figure: the scraper knife comprises a scraper knife body 1, a dismounting mechanism 2, a knocking mechanism 3, a fixing plate 21, a cover body 22, a limiting block 23, a butting block 24, a driving motor 25, a shaft rod 26, a first gear 27, a second gear 28, a connecting rod 29, a screw rod 210, a screw block 211, a sliding rod 212, a sliding groove 213, a sliding block 214, a connecting block 215, an inserting column 216, a first mounting plate 217, a second mounting plate 218, a jack 219, a transverse block 31, a vertical rod 32, a knocking hammer 33, a first hinge block 34, an electric push rod 35 and a second hinge block 36.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Please refer to fig. 1, a bull-dozer spiller assembly convenient to dismouting in this embodiment, including spiller body 1, dismouting mechanism 2 and knocking mechanism 3 are equal fixed mounting on the right side of spiller body 1, and knocking mechanism 3 is located the top of dismouting mechanism 2, dismouting mechanism 2 can carry out quick assembly disassembly maintenance to spiller body 1, knocking mechanism 3 is the structure that is used for making the defective material drop, dismouting mechanism 2 through setting up can make the dismouting process more simple and convenient, time saving and labor saving, the maintenance of being convenient for, maintenance efficiency is improved, knocking mechanism 3 through setting up can knock off the material of remaining on the wall simultaneously, it is more convenient to use, thereby use effect is improved.
The dismounting mechanism 2 in this embodiment is a structure for performing quick dismounting and maintenance of the blade body 1.
Referring to fig. 1-2, in the present embodiment, the dismounting mechanism 2 includes a fixing plate 21, a docking block 24 and two second mounting plates 218, a cover 22 is fixedly mounted on a left side of the fixing plate 21, a limiting block 23 inserted into the docking block 24 is fixedly mounted on a left side of the cover 22, a driving motor 25 is fixedly mounted on a right side of the fixing plate 21, an output shaft of the driving motor 25 is fixedly connected with a shaft rod 26, a first gear 27 is fixedly mounted on an outer side of the shaft rod 26, two second gears 28 are respectively engaged with a top and a bottom of the first gear 27, a connecting rod 29 is fixedly connected with an inner side of the second gear 28, a screw 210 is fixedly connected with one end of the connecting rod 29 away from the second gear 28, a screw 211 is threadedly connected with an outer side of the screw 210, a slide rod 212 is fixedly connected with a right side of the screw 211, two slide slots 213 are formed on a left side of the fixing plate 21, and a slide block 214 is slidably connected with an inner portion of the slide slot 213, the left side fixed mounting of spiral shell piece 211 has connecting block 215, and the equal fixed mounting in the opposite sides of two connecting blocks 215 has inserted post 216, and the left side fixed mounting of fixed plate 21 has two mounting panels 217, and jack 219 has all been seted up to the bottom of mounting panel 217 and No. two mounting panels 218.
In addition, two mounting panels 218 and butt joint piece 24 all with spiller body 1 fixed connection, the left side wall fixed mounting of the cover body 22 has a bearing piece No. one, the left end of axostylus axostyle 26 runs through a gear 27 and extends to the inboard of a bearing piece No. one, slide bar 212 and slider 214 fixed connection, the equal fixed mounting in relative one side of two mounting panels 217 has No. two bearing pieces, the one end fixed mounting that connecting rod 29 was kept away from to screw rod 210 is in the inboard of No. two bearing pieces, the round hole has all been seted up to the top and the bottom of the cover body 22, the inboard fixed mounting of round hole has No. three bearing pieces, connecting rod 29 fixed mounting is in the inboard of No. three bearing pieces.
It should be noted that the first bearing block provided in this embodiment can make the driving motor 25 stably drive the first gear 27 outside the shaft rod 26 to rotate, and the second gear 28 can be more stably meshed with the first gear 27 through the second and third bearing blocks.
The knocking mechanism 3 in this embodiment is a structure for dropping the cull.
Referring to fig. 1 and 3, the knocking mechanism 3 in the present embodiment includes a horizontal block 31, a vertical rod 32 hinged to the inside of the horizontal block 31, a knocking hammer 33 fixedly mounted on the left side of the vertical rod 32, a first hinge block 34 fixedly mounted on the top of the horizontal block 31, an electric push rod 35 hinged to the inside of the first hinge block 34, and a second hinge block 36 fixedly mounted on the right side of the vertical rod 32.
In addition, the telescopic end of the electric push rod 35 is hinged inside the second hinge block 36, the transverse block 31 is fixedly installed on the left side of the fixing plate 21, the insertion column 216 is inserted into the insertion hole 219, the left side of the knocking hammer 33 is fixedly provided with a rubber sleeve, and the knocking hammer 33 can be prevented from damaging the blade body 1 during knocking through the arranged rubber sleeve.
It should be noted that, in this embodiment, the material of the knocking hammer 33 is carbon steel, and the carbon steel has higher strength, better knocking effect, and long service life.
The working principle of the above embodiment is as follows:
(1) the first mounting plate 217 and the second mounting plate 218 are positioned by inserting the limiting block 23 and the butt joint block 24, then the first gear 27 outside the shaft rod 26 is driven to rotate by the arranged driving motor 23, the first gear 27 drives the inner connecting rod 29 to connect the screw rod 210 to rotate by the two engaged second gears 28, the screw rod 210 is in threaded connection with the inner side of the screw block 211, and meanwhile, the sliding block 214 connected with the sliding rod 212 on the right side of the screw block 211 is in sliding connection with the inner side of the sliding groove 213, so that the screw blocks 211 can be moved close to or away from each other by the two rotated screw rods 210, the screw block 211 drives the inserting column 216 connected with the connecting block 215 to be inserted into the inserting hole 219, and further, the installation of the scraper knife body 1 and the fixing plate 21 is completed, and the same is realized when the scraper knife is disassembled, and the two inserting columns can be moved out of the inserting column from the inserting hole by the reverse rotation of the driving motor 25.
(2) Through the second articulated block 36, electric putter 35 and the first articulated block 34 that set up with articulate under the inboard montant 32 of horizontal piece 31 cooperation, when electric putter 35's flexible end removed, can adjust the angle of montant 32, and then can make to strike hammer 33 and hit the striking blade body 1 and can knock off the material that remains on the wall.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A bulldozer scraper knife assembly convenient to disassemble and assemble is characterized by comprising a scraper knife body (1), a disassembling and assembling mechanism (2) and a knocking mechanism (3);
the dismounting mechanism (2) and the knocking mechanism (3) are both arranged on the right side of the scraper knife body (1), and the knocking mechanism (3) is arranged above the dismounting mechanism (2);
the disassembly and assembly mechanism (2) comprises a fixed plate (21), a butt joint block (24) and two second mounting plates (218), a cover body (22) is fixedly mounted on the left side of the fixed plate (21), a limiting block (23) spliced with the butt joint block (24) is fixedly mounted on the left side of the cover body (22), a driving motor (25) is fixedly mounted on the right side of the fixed plate (21), and an output shaft of the driving motor (25) is fixedly connected with a shaft lever (26);
knocking mechanism (3) includes horizontal block (31), the inboard of horizontal block (31) articulates there is montant (32), the left side fixed mounting of montant (32) has the striking hammer (33), the top fixed mounting of horizontal block (31) has articulated piece (34) No. one.
2. The dozer blade assembly as claimed in claim 1 wherein: the outer side fixed mounting of axostylus axostyle (26) has a gear (27), two mounting panel (218) and butt joint piece (24) all with spiller body (1) fixed connection, the left side wall fixed mounting of cover body (22) has a bearing piece, the left end of axostylus axostyle (26) runs through a gear (27) and extends to the inboard of a bearing piece.
3. The dozer blade assembly as claimed in claim 2 wherein: the top and the bottom of a tooth piece (27) all mesh and have two No. two gears (28), the inboard fixedly connected with connecting rod (29) of No. two gears (28), one end fixedly connected with screw rod (210) of No. two gears (28) are kept away from in connecting rod (29).
4. A dozer blade assembly as claimed in claim 3 wherein: the outside threaded connection of screw rod (210) has spiral shell piece (211), the right side fixedly connected with slide bar (212) of spiral shell piece (211), two spout (213) have been seted up to the left side of fixed plate (21), the inside sliding connection of spout (213) has slider (214), slide bar (212) and slider (214) fixed connection.
5. The dozer blade assembly as claimed in claim 4 wherein: the left side fixed mounting of spiral shell piece (211) has connecting block (215), two equal fixed mounting in one side of the back of the body of connecting block (215) has inserted post (216), the left side fixed mounting of fixed plate (21) has two mounting panels (217).
6. The dozer blade assembly as claimed in claim 5 wherein: jack (219) have all been seted up to the bottom of a mounting panel (217) and No. two mounting panels (218), two the equal fixed mounting in relative one side of a mounting panel (217) has No. two bearing blocks, the one end fixed mounting that connecting rod (29) were kept away from in screw rod (210) is in the inboard of No. two bearing blocks.
7. A dozer blade assembly as claimed in claim 3 wherein: the top and the bottom of the cover body (22) are both provided with round holes, the inner sides of the round holes are fixedly provided with a third bearing block, and the connecting rod (29) is fixedly arranged on the inner sides of the third bearing block.
8. The dozer blade assembly as claimed in claim 1 wherein: the inboard of articulated piece (34) articulates there is electric putter (35), the right side fixed mounting of montant (32) has articulated piece (36) No. two, the flexible end of electric putter (35) articulates in the inside of articulated piece (36) No. two.
9. The dozer blade assembly as claimed in claim 6 wherein: the transverse block (31) is fixedly installed on the left side of the fixing plate (21), the knocking hammer (33) is made of carbon steel, and the inserting column (216) is inserted into the inserting hole (219).
CN202110697492.4A 2021-06-23 2021-06-23 Bulldozer shovel blade assembly convenient to disassemble and assemble Active CN113477628B (en)

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CN202110697492.4A CN113477628B (en) 2021-06-23 2021-06-23 Bulldozer shovel blade assembly convenient to disassemble and assemble

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110697492.4A CN113477628B (en) 2021-06-23 2021-06-23 Bulldozer shovel blade assembly convenient to disassemble and assemble

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CN113477628A true CN113477628A (en) 2021-10-08
CN113477628B CN113477628B (en) 2022-08-05

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640553A (en) * 1985-01-11 1987-02-03 Bartell Industries Ltd. Brake system for cutters of surface cleaning cutter cage
US20030084920A1 (en) * 2001-11-07 2003-05-08 Sawtelle Randy Richard Bucket - razor
KR101628992B1 (en) * 2015-12-01 2016-06-21 구본철 Cleaning tool attached to a excavator
CN107971311A (en) * 2017-11-14 2018-05-01 饶胜智 A kind of transport development barrel of cement cleaning plant
CN108246386A (en) * 2018-01-17 2018-07-06 徐志华 Device is broken in a kind of municipal administration road construction stone multiple location impact into pieces
CN209260796U (en) * 2018-11-08 2019-08-16 天津海润移山科技发展股份有限公司 A kind of earth mover shoveling
CN110714496A (en) * 2019-09-07 2020-01-21 中煤东方市政建设集团有限公司 Land leveler capable of automatically cleaning shovel blade
CN112049163A (en) * 2020-09-14 2020-12-08 张登发 Excavator dozer blade capable of automatically cleaning dirt
CN212153497U (en) * 2020-03-10 2020-12-15 江西通威公路建设集团有限公司 Road bulldozer for highway construction
CN213018753U (en) * 2020-08-11 2021-04-20 成都科旭电子有限责任公司 Fire door watch-dog is prevented to garden office building normal close formula

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640553A (en) * 1985-01-11 1987-02-03 Bartell Industries Ltd. Brake system for cutters of surface cleaning cutter cage
US20030084920A1 (en) * 2001-11-07 2003-05-08 Sawtelle Randy Richard Bucket - razor
KR101628992B1 (en) * 2015-12-01 2016-06-21 구본철 Cleaning tool attached to a excavator
CN107971311A (en) * 2017-11-14 2018-05-01 饶胜智 A kind of transport development barrel of cement cleaning plant
CN108246386A (en) * 2018-01-17 2018-07-06 徐志华 Device is broken in a kind of municipal administration road construction stone multiple location impact into pieces
CN209260796U (en) * 2018-11-08 2019-08-16 天津海润移山科技发展股份有限公司 A kind of earth mover shoveling
CN110714496A (en) * 2019-09-07 2020-01-21 中煤东方市政建设集团有限公司 Land leveler capable of automatically cleaning shovel blade
CN212153497U (en) * 2020-03-10 2020-12-15 江西通威公路建设集团有限公司 Road bulldozer for highway construction
CN213018753U (en) * 2020-08-11 2021-04-20 成都科旭电子有限责任公司 Fire door watch-dog is prevented to garden office building normal close formula
CN112049163A (en) * 2020-09-14 2020-12-08 张登发 Excavator dozer blade capable of automatically cleaning dirt

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