CN1008825B - Bucket front edge sheath - Google Patents

Abstract

One or more shrouds are mounted to the leading edge of the excavating bucket, each shroud having a blunt front portion and a rear portion, the rear portion being divided into two spaced arms, and an aperture passing through the arms, preferably concentric, and a ring slidably received in the aperture and having its inner edge welded to the leading edge of the bucket between the arms.

Description

The bucket lip sheath

The present invention relates to the bucket lip sheath.More particularly, be a kind of guide edge sheath of solid bucket lip.

Canadian Patent CA1166287 discloses a kind of sheath that is used for bucket lip, the separative jacket body of sheath, and it has parallel support arm whole and that extend back and the hole of passing support arm is arranged.

The object of the present invention is to provide a kind of guide edge sheath of bucket lip, two parallel leg that it has a front portion and extends back, with the hole of passing support arm, it has a ring that interior ring surface and outer ring surface are arranged, ring vertically is contained in the hole with described plane slidably, and the end of described ring and described bucket lip join, and bucket lip has a weld seam, weld seam extends along interior ring surface is inboard, and the part of bucket lip is exposed from described hole.Sheath of the present invention can be fixed on the leading edge well, and the total performance of scraper bowl is greatly improved.

With reference to accompanying drawing, below most preferred embodiment of the present invention will be described.

Fig. 1 is the scraper bowl partial plan, and common teeth and sheath of the present invention are housed.Other parts of scraper bowl have been removed for the size of dwindling figure.

Fig. 2 is the sectional drawing that draws according to the indicated plane of Fig. 1 line 2-2.

Fig. 3 is the part enlarged drawing of structure shown in Figure 2.

Fig. 4 is the plan view of structure shown in Figure 3.Other parts are removed.

The sectional drawing that Fig. 5 makes according to the indicated plane of Fig. 4 line 5-5.

Usually need a thick-walled metal scraper bowl when carrying out various excavations, mining and dredge operation, and generally comprise a horizontal lower plane 6, generally it is level basically.Its side 7 is bent upwards, and has played the effect of surrounding at least in part.

The feature of scraper bowl is that a leading edge 8 is arranged, and many teeth 9 are housed on it.They are apart opening in the width of scraper bowl usually, and an outstanding forward very big segment distance.Although teeth 9 has various structure, in general, there is not specific (special) requirements, these parts shown in yet just having only on the figure as profile of tooth.Teeth to be installed separately on scraper bowl and normally to be dug in the thing in order being easy to dig.Land on the tooth or cap are normally removable, because they are easy to be subjected to serious wearing and tearing, and in order to excavate the frequent tooth cap that needs to change better.

Although scraper bowl does not have further necessity of protection in some cases, under many circumstances, owing to dug the bump of thing, the bucket lip 8 between each tooth 9 is subjected to serious scratch, wearing and tearing and chipping.

For fear of some such wearing and tearing and return to better duty, specially installed according to sheath 11 provided by the present invention in the bucket lip part that has been worn.Supplied with many such sheaths, on the bucket lip between per two adjacent teeth 9, a sheath has been installed all.Sometimes also be installed on the forward position of scraper bowl side.

Each sheath 11 have one more blunt to forward part 12, length is than the length much shorter of tooth 9, width is slightly less than the width between the adjacent teeth, but occupies the left space of enough big between cog.Sheath 11 is normally made of high alloy cast steel, and forms the shape that is similar to the globule substantially on the vertical section, as shown in Figure 2.Sheath has leading edge 13, and it can be slightly sharper keen than the remainder of jacket body, increases earlier or broadening, and from large to small then, sheath is split up into two support arms 14 and 15 backward, and two support arms limit and form a dead slot 16 thus.Fit dimension will guarantee to allow leading edge 8 be loaded into.Cooperation does not need tight especially, preferably than the tight fit pine.Like this, sheath two arms can be easy to install to bucket lip and partly get on.And between adjacent teeth centering approx.

The upper and lower interface of the groove between two support arms preferably is flat basically, and parallel to each other, and the outer boundary of sheath is preferably conical, and the rear portion is thin.

According to specially design of the present invention, two holes 21 and 22 are arranged on the arm 14 and 15.Coaxial line is normally made in hole on axis of pitch 23 (Fig. 3).Each hole is not in fact round in plan view, but oval.Major axis in a lateral direction, as shown in Figure 4.

Pack in each hole one and encircle 24, its thickness is near the thickness of adjacent support arm.Its face profile is oval-shaped equally, and more smaller than the outline line in hole.The cross section of ring 24, as shown in Figure 5, preferably conical.Little near outer end or top, bottom or big near the bucket lip place.Thereby ring inwall 26 is conical.The size of ring should guarantee to allow it enter easily in the hole 21, and can allow it move easily, makes it to join with contiguous bucket lip 8.When any one ring is installed, does not need to use any instrument or take great power.

Ring is gone into the position and with weld seam 27 it is fixed on position above the bucket lip with the inwall in bucket lip and hole 21 back that joins.Generally speaking, ring and sheath 11 do not weld together.Two boxing of each sheath to the present position after, find in practice that sheath fixes finely, played the effect of the guide edge of the bucket lip that protection exposes.The total performance of scraper bowl has obtained very big improvement, and the edge is very even, and it is fine to be dug the thing guidance quality.

In some cases, even bucket lip 31(is Fig. 5) be out of shape or be worn, 32 fixing in each hole 33 and 34 on ring is an effective locator.This ring can not stretch out jacket outer surface 36 fully yet when bucket lip had heavy wear.Even so, weld seam 37 also can remain on part on the due position, but, if be ready, can adopt additional weld seam 38.

Find when adopting this device that the horizontal elliptical shape of ring can prevent effectively that the sheath on the bucket lip from reversing, and can increase the bonding area of annular joint face.

Under any circumstance, sheath is installed can not have any harmful effect to the mining ability of full depth tooth 9, can prevent or compensate the inordinate wear that bucket lip inserts opening dead slot part on the contrary, thereby improve total functional performance.

Although the size of sheath without limits, the weight of the sheath made from low-alloy steel is generally in 250 to 300 pounds scope.

Claims (4)

1, a kind of solid bucket lip guide edge sheath, this leading edge has the leading edge surface of a pair of almost parallel and the guide edge of a horizontal expansion between leading edge surface, described sheath comprises a jacket body that can separate with bucket lip, it has one to be symmetrical in the support arm that the front portion of central plane and a pair of and described front portion are the whole and interval that extends back from the front portion substantially, they are parallel to each other, and join substantially with described leading edge surface and guide edge; With extend through at least one described support arm to the hole of described leading edge surface, it is characterized in that: have a ring (24) that interior ring surface (26) and outer ring surface are arranged, ring vertically is contained in the hole (21,22) with described plane, and the end of described ring and solid bucket lip (8) join, bucket lip has a weld seam (27), weld seam extends along the inboard of described interior ring surface, and the part of bucket lip (8) is exposed from described hole (21,22).

2, a kind of sheath according to claim 1, it is characterized in that: comprise a pair of described hole, open in corresponding support arm (14,15) in each hole, and in the relative both sides of said solid leading edge centering each other, also include two rings, put a ring in each corresponding hole, its end and said leading edge are joined.

3, a kind of sheath according to claim 1 and 2 is characterized in that, each hole and ring are oval from being parallel to said plane basically.

4, sheath according to claim 1 and 2 is characterized in that: described ring respectively has conical inboard wall (26), and its a thicker end and bucket lip joins.

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