CN87208281U - Cross section variable hopper rod for excavator - Google Patents
Cross section variable hopper rod for excavator Download PDFInfo
- Publication number
- CN87208281U CN87208281U CN 87208281 CN87208281U CN87208281U CN 87208281 U CN87208281 U CN 87208281U CN 87208281 CN87208281 CN 87208281 CN 87208281 U CN87208281 U CN 87208281U CN 87208281 U CN87208281 U CN 87208281U
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- girder
- box
- section
- excavator
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- 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.)
- Expired - Lifetime
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Abstract
The utility model belongs to the opencast equipment for excavation category, particularly a hopper rod for the excavator. The utility model is characterized in that the bygone uniform section box girder is changed to a changing section, the connector between the two girders is in a cylindroid shape, the toothed rack is integrally welded to the lower cover plate of the girder, the front baffle plate on the girder is canceled, the limit switches are used to limit the space, and the box girder and the cylindroid material adopt the low-alloy high-strength steel plate. The utility model provides a novel hopper rod subjected to the repeated polytropic change load to the open-air mining satisfiable excavator working under the bad situation.
Description
The utility model belongs to the mining equipment category of opencut, and specifically, it is a kind of parts of excavator.
By Taiyuan Heavy Machinery Plant WK-4A excavator product description, provided a kind of casting---the dipper of weldment package assembly.It is by two prismatic welded griders of box-shaped and a cast-steel separator, by Bolt Connection together.Segmentation is welded with tooth bar on the lower cover of box-girder, is welded with plate washer in the front and back end of beam, and the material of box-girder adopts the 15MnV steel plate.Because adopt Bolt Connection, the erection work amount is big; And bolt is loosening easily, so the maintenance of dipper is frequent.
In the Fushun excavator WD-400 of manufactory type mining excavator sample, provided a kind of whole dipper.It is with two box-girders and the structure that connector welds together.This whole dipper, though overcome the shortcoming of Bolt Connection, because box-girder is prismatic on total length, so stressed distribution is unreasonable.Add upper rack and still adopt the segmentation welded construction, and in the front and back end of beam for the spacing plate washer that is welded with, this stress that has just strengthened member is concentrated.Therefore, this dipper is prone to crackle in mining process, and the application life of dipper is short, has influenced the efficient of excavator.
The purpose of this utility model is the excavator boom that proposes a kind of new construction, and when satisfying mine excavator and working under abominable situation, dipper can stand repeatedly changeable load, thereby improves its application life.
Characteristics of the present utility model are to change in the past uniform section box-girder into box section girder, make the stress of dipper reasonable, and the connector between two box-girders is oval tubular, has strengthened the antitorque effect of member; Tooth bar integral body is welded on the lower cover of box-girder, and has cancelled front baffle board on the box-girder, adopts limit switch spacing, and this stress that has just reduced dipper is greatly concentrated, and has strengthened the rigidity of member; The material of box-girder and oval connecting cylinder adopts the low-alloy structural steel plate, preferably adopts low-alloy high-strength steel plate, as homemade imitative T-1 steel and HQ60, HQ80C new material.
Calculate according to the principle of equal strength, box section girder is meant the box-girder in stressed serious place (promptly being positioned at the part that the scraper bowl end accounts for total length 1/3rd) increasing section size, its increase value: being 25～30% on depth of beam, is 28～35% on the width of beam.
Increasing section size on depth of beam is meant that the size in box-girder lower cover one side increases, and the increasing section size is the one side towards connecting cylinder on the width of beam.
Box section girder increases in the size of lower cover one side, has adopted the stiffener structure, and the tooth bar cross section is carried out the transition on the variable cross-section of box-girder gradually, has avoided stress to concentrate.
In order to improve the bending resistance effect of dipper, and strengthen box-girder being connected between cover plate and the side plate up and down, to the height of cylindroid, should be between up and down between the cover plate center line size.
The utility model is compared with dipper in the past, because rational in infrastructure, can improve more than the twice application life; Dipper weight saving 25%, every pair of dipper can be saved two tons of alloy steel products; New dipper does not in use have light maintenance, has not only improved production efficiency but also can save maintenance cost; New dipper machining amount is few, and assembling can be saved a large amount of man-hours easily.
Fig. 1 is as 4m
3The structure chart of the variable cross-section dipper of excavator.
Two box section girders (1) are connected with welding method with cylindroid (2), tooth bar (3) is after splicing, integral solder is on the lower cover (4) of the uniform section part of box-girder, in the increase of depth of beam upper section size is one side at lower cover, the increase value is 26.4%, in the increase of the width upper section size of beam is one side towards connecting cylinder, and the increase value is 31%.Stiffener structure (6) is adopted in the transition of tooth bar and variable cross-section.
Fig. 2 is the A-A view, and the height of cylindroid equals the size between the center line of the center line of upper cover plate (5) and lower cover (4).
The drawing explanation:
1---box section girder, 2---oval connecting cylinder,
3---tooth bar, 4---lower cover,
5---upper cover plate, 6---stiffener.
Claims (7)
1, the whole dipper of a kind of excavator, it is to be welded together by two uniform section box-girders and a connector, segmentation is welded with tooth bar on the lower cover of box-girder, in the front and back end of beam is the spacing plate washer that is welded with, it is characterized in that described box-girder is a variable cross-section, connector between two box section girders is oval tubular, the tooth bar integral solder is on the lower cover of box-girder, cancelled front baffle board on the box-girder, the employing limit switch is spacing, and the material of box-girder and oval connecting cylinder adopts the low-alloy structural steel plate.
2, according to the whole dipper of the described excavator of claim 1, it is characterized in that described box section girder, be meant and be positioned at 1/3rd the part that the scraper bowl end accounts for the dipper total length, the box-girder of increasing section size, its increase value: being 25～30% on depth of beam, is 28～35% on the width of beam.
3, according to claim 1 or 2 described box section girders, it is characterized in that described on depth of beam the increasing section size, be meant that the size in box-girder lower cover one side increases, increasing section size on the width of beam is meant the one side towards coupling tunnel.
4, increase according to the size of the described box section girder of claim 3, it is characterized in that described this increase, progressively carry out the transition on the variable cross-section of box-girder, adopted the stiffener structure in order to make the tooth bar cross section in the lower cover one side.
5,, it is characterized in that described link position is the height that makes cylindroid between the size between the cover plate center line up and down according to being connected of described box-girder of claim 1 and oval connecting cylinder.
6,, it is characterized in that described low-alloy structural steel plate refers to the low-alloy high-tensile structural steel plate according to the material of described box-girder of claim 1 and oval connecting cylinder.
7, according to claim 1 or 6 described box-girders and the used low-alloy structural steel plate of oval connecting cylinder, it is characterized in that described low-alloy high-strength steel plate adopts homemade imitative T---1 steel or homemade HQ60, HQ80C new material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208281 CN87208281U (en) | 1987-05-19 | 1987-05-19 | Cross section variable hopper rod for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87208281 CN87208281U (en) | 1987-05-19 | 1987-05-19 | Cross section variable hopper rod for excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87208281U true CN87208281U (en) | 1988-01-27 |
Family
ID=4823574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87208281 Expired - Lifetime CN87208281U (en) | 1987-05-19 | 1987-05-19 | Cross section variable hopper rod for excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87208281U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432344C (en) * | 2003-06-30 | 2008-11-12 | 日立建机株式会社 | Working arm for construction machine and method of producing the same |
| CN102296659A (en) * | 2011-05-31 | 2011-12-28 | 太原重工股份有限公司 | Bucket arm connecting cylinder of mine excavator and manufacturing method of bucket arm connecting cylinder |
-
1987
- 1987-05-19 CN CN 87208281 patent/CN87208281U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432344C (en) * | 2003-06-30 | 2008-11-12 | 日立建机株式会社 | Working arm for construction machine and method of producing the same |
| CN102296659A (en) * | 2011-05-31 | 2011-12-28 | 太原重工股份有限公司 | Bucket arm connecting cylinder of mine excavator and manufacturing method of bucket arm connecting cylinder |
| CN102296659B (en) * | 2011-05-31 | 2014-02-19 | 太原重工股份有限公司 | Manufacturing method of bucket arm connecting cylinder of mine excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |