SU872660A1

SU872660A1 - Excavator bucket

Info

Publication number: SU872660A1
Application number: SU792821853A
Authority: SU
Inventors: Михаил Ефимович Гарбер; Олег Михайлович Романов
Original assignee: Всесоюзный научно-исследовательский и проектно-технологический институт угольного машиностроения
Priority date: 1979-09-27
Filing date: 1979-09-27
Publication date: 1981-10-15

Description

(54) КОВШ ЭКСКАВАТОРА(54) BUCKET EXCAVATOR

II

Изобретение относитс к строительству и угольной горнодобывающей промышленности , в частности к конструкции ковша экскаватора.The invention relates to the construction and coal mining industry, in particular to the design of an excavator bucket.

Известен ковш экскаватора, включаюший корпус с режущей частью и выполненный из титанового сплава 1.The excavator bucket is known, including a housing with a cutting part and made of titanium alloy 1.

Недостатками этого ковща вл ютс относительно низкий срок -службы, высока стоимость и сложность технологии его изготовлени .,The disadvantages of this scoop are relatively low service life, high cost and complexity of its manufacturing technology.,

Наиболее близок к предлагаемому коЬш экскаватора, содержащий корпус, включающий режущий козырек, днище и стенку, и защитное покрытие в виде полос трени , состо щих их стальной несущей основы и наваренных на них слоев износостойкой наплавки ,Closest to the proposed excavator, comprising a body comprising a cutting visor, a bottom and a wall, and a protective coating in the form of friction bands consisting of a steel bearing base and layers of wear-resistant surfacing welded on them

Недостатками такого ковща вл ютс небольша толщина наплавленного сло и относительно низкий срок службы при работе в услови х эррозионного износа, conpioвождаемого ударами.;The disadvantages of such a scoop are the small thickness of the deposited layer and a relatively low service life when operating under conditions of erosive wear, condated by blows .;

Цель изобретени - повышение долговечности работы ковша.The purpose of the invention is to increase the durability of the bucket.

Указанна цель достигаетс тем,. ч;го защитное покрытие корпуса выполнено ИзThis goal is achieved by h; go protective cover made of

закрепленных с интервалом по длине ковша на внешней и внутренней сторонах режущего козырька и с интервалом по длине и ширине ковша на внешних сторонах днища и задней стенки пластин с износостойкими брусками трапецеидального сечени , которые вмонтированы в пластины с внешним расположением меньщих оснований и направлены по отнощению к продольной оси ковша под углом 45-60° в пластинах режущего козырька и под углом 45-90° в пластинах , днища и задней стенки, при этом толщина каждой пластины равна 0,,0 толщины корпуса ковша, а обща масса износостойких брусков в каждой пластине равна 0,08-0,5 массы последней.fixed with an interval along the length of the bucket on the outer and inner sides of the cutting cap and with an interval along the length and width of the bucket on the outer sides of the bottom and rear wall of the plates with wear-resistant trapezoidal section bars, which are mounted in the plates with an external arrangement of smaller bases and directed relative to the longitudinal the bucket axis at an angle of 45-60 ° in the plates of the cutting cap and at an angle of 45-90 ° in the plates, the bottom and the rear wall, the thickness of each plate is 0,, 0 the thickness of the bucket body, and the total mass wear oykih bars in each plate is 0,08-0,5 last mass.

J5 На фиг. 1 изображен ковш экскаватора; на фиг. 2 - пластина с износостойкими брусками.J5 FIG. 1 shows an excavator bucket; in fig. 2 - plate with wear-resistant bars.

Ковш содержит режущий козырек 1, днище 2 и заднюю стенку 3, к которым прива рены защитные элементы, выполненные вThe bucket contains a cutting visor 1, the bottom 2 and the rear wall 3, to which the protective elements, made in

Claims

20 as steel plates 4 with wear-resistant bars 5 installed in them, for example, from white chromium cast iron and spaced at intervals on the outer and inner sides of the cutting hood 1 and in length and width on the outer sides of the bottom 2 and the back wall 3. Wear-resistant bars 5 have the shape of a trapezoid in cross section, due to which they are securely held in the steel base of the plate 4. In the plates 4 for the cutting visor 1, wear-resistant bars 5 are located at an angle of 45-60 ° to the extension axis of the bucket, and for the bottom 2 and rear wall 3 angle Positions with respect to this axis can vary from 45 to 90 °. The number and pitch of wear: resistant bars 5 in the steel plate 4 is limited by the weight ratio, 08 (where m is the mass of the wear-resistant bars 5; M is the mass of the steel plate 4), ensuring mechanical fixation of the wear-resistant bars 5 in the steel plate 4. The upper limit of the ratio : M less than 0.5. The plate thickness is 0.5-2.0 of the bucket body thickness. When the bucket is in operation, during its entry into the rock, for example, in the rock mass, the bucket is subjected to a cutting effect and suffers considerable shock loads. resulting in significant wear of its cutting visor 1. Further, during rock formation in the ladle during its translational motion, wear occurs, accompanied by separate impacts of the inner and outer sides of the visor 1 and the outer sides of the bottom 2 and the rear wall 3. When unloading the bucket the rock, spit out, wears, mainly, the inner surface of the cutting cap of the bucket 1. The bucket visor 1 is intensively worn on both sides, inner and outer, so that the solid protective plates 4 are arranged symmetrically on both surfaces. The bottom 2 and the rear wall 3 are worn on the external side, and therefore their inner surface does not need to be protected. The protective plates 4 on the bottom 2 and the rear wall 3 are arranged along the length and width of the bucket at certain intervals to reduce the weight of the bucket and save wear-resistant bars 5. For hp: M equal to or less than 0.08, it is possible to melt the surface layer of wear-resistant bars 5 during their pouring steel and forming a bimetallic bond. This is undesirable under shock loads, since the crack formed in the wear-resistant bar 5 develops through a brittle intermediate layer into the steel plate 4 and leads to the destruction of the latter in the course of further work of the ladle. With a ratio t: M equal to or greater than 0.5, the reliability of fastening decreases, since the distance between the wear-resistant bars 5 becomes so small that with high impact loads during construction, they can be torn off from the viscous steel plate 4. If wear resistant bars 5 is less than 45 °, then the area of unprotected steel plate 5 increases between them, which may result, in the case of the presence in the rock mass of a significant number of pieces smaller than the installation step of wear resistant bars 5, to rapid wear of plate 4 and falling out of wear-resistant bars 5 from plate 4. At angles "L greater than 60 ° for the cutting visor, 1 bucket a significant part of the steel plate 4 in the lead-in part is unprotected and quickly deteriorates, as a result of which wear-resistant bars 5 fall out of the steel sheet 4. For the wear-resistant bars 5 of the protective plates 4 of the bottom 2 and the rear wall 3, the angle can be increased to 90 °, since the steel plate 4 is already protected by solid plates of the cutting hood 1, and the gaps between them are filled with rock masses. The bucket is sealed and plays the same role as the wear-resistant bars 5. Claim of an excavator comprising a body including a cutting visor, a bottom and a rear wall, and a protective covering of the body, characterized in that, in order to increase the durability of the bucket, the protective sheath of the body is made of fixed ones with an interval along the length of the bucket on the outer and inner sides of the cutting hood and with an interval along the length and width of the bucket on the outer sides of the bottom and rear wall of the plates with wear-resistant trapezoid bars sections built into the plates with an external location of smaller bases and directed relative to the longitudinal axis of the bucket at an angle of 45-60 ° in the plates of the cutting hood and at an angle of 45-90 ° in the plates of the bottom and rear wall, while the thickness of each plate is equal to 0.5-2.0 the thickness of the bucket body, and the total mass of wear-resistant bars in each plate is 0.08-, 5 mass of the latter. Sources of information taken into account during the examination 1. USSR author's certificate No. 299609, cl. E 02 F 3/40, 1969.

2. The patent of France No. 2173822, cl. In 66 C 3/00, published. 1972 (prototype).