RU1795011C - Tooth of earth-moving machine bucket - Google Patents

Abstract

Usage: working bodies of mining and earthmoving machines for coal, mining and other industries. SUBSTANCE: has wear-resistant inserts 1 in the form of ribs. The ribs 1 are evenly distributed along the front and rear faces of the tooth and protrude above their surfaces. The depth of the ribs in the tooth body is not less than the maximum allowable wear of the front and rear faces. During operation, the ribs absorb most of the load and wear out faster than the tooth body, increasing the durability of the cutting part. 2 ill.

Description

with C

The invention relates to the working bodies of mining and earth moving machinery used in coal, mining and other industries.

A tooth tip is known for developing rocks and soils on the front face of which longitudinal ribs are made, alternating with grooves. These ribs are a natural extension of the tooth body, made of the same metal and have the same surface strength.

The disadvantage of this design is the lack of self-sharpening of the tooth due to the implementation of both the ribs and grooves of the same material / The absence of self-sharpening leads to an increase in cutting resistance, which ultimately reduces the durability of the tooth.

Closest to the invention, the technical solution is the tip of the tooth of the cultivator, where the material is oriented

 with increasing hardness in the direction from the plane of symmetry intersecting the front and back faces to the side faces with a gradient providing the ratio of maximum hardness to minimum 1.25-2.00.

The disadvantage of this design is the short life of the teeth due to the lack of carbide protection of the teeth that are most susceptible to wear on the back and front edges of the teeth. Technologically, providing a hardness buildup in width from the plane of symmetry to the side faces is difficult.

The aim of the invention is to increase the durability of the tooth by reducing wear on the cutting part.

The effect of applying the invention is determined by prolonging the life and pain of 4 S.

neck on the tooth as a result of their-; mrzatrchki. :::; p; v ./.:;;- :; V,;, - :::;,.:; :; . . ;;; -. /; L. / Decree: A goal is achieved: that in yub. k (;): 1st in 1st $ ml 6th of M. eshi Ib11 containing cutting aet; b in; the form of the anterior, posterior, 5. days and lateral faces; r {varying in width by the width of the || ente of its hardness is trans-. : One day for one rayy zb a ny znbso-. ; : cT: djti ifl: B ae i W | Mfle edges / uniform pg1Cn (e; yn $

;; Вё хн: дхггью Ґpa) e: i3; rip the value is- ;; . : glu1e / 1 eII;

:; burden Nörg ødnej m} with the back faces ..-.; ;, ;;:; Comparison, not telkr with prf-rtype, but -15 4: Other d-ex; nh (gk Mi :: r1ё: a1e n M: and not Lp.v, :: rShoyye:; 6t / pr OtotyG1a, :: ; Thr zvyy yaydal ...: h: (srter 1o {th 1st dyet e1n 2: -: On; fig; y1 gdr aza vidYoku with bgrjrm - groove; 1 through ureter;. u, where the floor of the UHpbf pad is worn out 4 Zaschnei; gr.; and tooth, h -depth 7 - up to pn Mr wear ;; b | 1af | lg;; 2t-, yoёtsёnyo AA 25 For yyh h.: line & tiferieH $; 3QHS: No. w & tiMw & $ 6ta. Of the tooth body .; Rabbchay Part of the tooth has pro-V

; f - ;: r p .. mu d ha:;. and s o 6 .f, e neither

Tooth vvShcha; MM

holding the cutting part of the VG in the form of the anterior, posterior and lateral faces when alternating along the tooth width of the tooth with a gradient of: hardness that increases from the central plane to the lateral Granules, so that in order to increase durability

longitudinal ribs 1 made of carbide material, towering above the front and rear faces of the tooth body 2 and buried in the tooth body by the value of h grooves 3 between the longitudinal ribs 1.

.When the digger is operating, the longitudinal ribs 1 of the bucket tooth cut into the rock, destroying it, in the sections of the cut (3), perceiving the main part of the cutting resistance. Then, the shavings of the rock are separated by the body of tooth 2 along the sections of elastic displacement into the groove 3 between two adjacent longitudinal ribs 1, The main load falls on the ribs, which have an avant-garde role in fracture; this is a monolith of rock and therefore, despite the greater hardness compared to: material of the tooth body, wear out more intensively, reducing the size of the fir tree) :: part of the load on the sinus in the tooth body; ; Self-point; tooth, contributing to improved performance and.,. (. MibJ; n BWiy Ck:) iMaH durability, due to the change in the hardness gradient of the tooth along its width, occurs due to the difference in the strength and wear resistance of the longitudinal ribs, on the one hand , and the body of the tooth, on the other SIDE. ; ; - v v V:.

tooth due to the reduction of wear of the cutting part, it is equipped with yznosortoy inserts in the form of ribs, evenly spaced along the width on the front and rear faces and protruding above their surfaces, and the depth of the ribs in the tooth body is not less than the maximum allowable wear of the front and back faces of bulk material.

FIG. 1,

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