TWM656211U - Reinforced teeth for excavator grab - Google Patents

Abstract

The invention discloses a reinforced digging tooth of a digging machine grab bucket, wherein each digging tooth of the digging machine grab bucket is provided with a metal reinforcing plate, the metal reinforcing plate is a quadrilateral or triangular metal straight strip plate with a width smaller than the digging tooth, the metal reinforcing plate is arranged parallel to the center line of the digging tooth, the narrow side bottom surface of the metal reinforcing plate is welded to the inner surface of the digging tooth, so that the metal reinforcing plate is vertically fixed to the inner surface of the digging tooth; and The rear end of the metal reinforcement plate extends to the inner belly of the digging tooth, and the front end of the metal reinforcement plate protrudes from the cutting edge of the digging tooth to form a protruding plate. The protruding plate is used to impact and scrape the rock formation during excavation, thereby making the digging teeth of the grab bucket more wear-resistant, increasing the service life of the digging teeth, preventing the digging teeth from breaking from the rear end assembly, and more effectively impacting, crushing and scraping the rock formation.

Description

Reinforced teeth for excavator grab

This invention is related to the technical field of excavators, especially to a kind of reinforced digging teeth of excavator grab, which can enhance.

Nowadays, the land preparation works for construction bases are often carried out by heavy machinery such as excavators and backhoes to improve or prepare the bases for the main works. For example, before the base is excavated, continuous wall works or foundation pile works are first carried out according to the engineering needs. At this time, the engineering works usually use the backhoe 100 shown in Figure 1 or Patent Publication No. M326545 to carry out deep excavation. The known excavator 100 is suspended and installed on the boom 301 of the crane 300 through the steel cable system 200. The hydraulic system of the crane 300 controls the steel cable system 200 to make the excavator 100 rise and fall vertically. The two grab buckets 400 (shovel buckets) at the lower end of the excavator 100 can be opened and closed to impact and dig the soil layer, highly dense gravel layer, gravel or rock bed, and gradually dig to a predetermined depth.

When the excavator 100 is excavating a continuous wall or other project, the two grab buckets 400 have jagged digging teeth 401 (bucket teeth) at the lower ends of the openings, so that the excavator can smoothly complete the excavation and grabbing of softer soil layers. However, when the excavation reaches a certain depth and turns into gravel or rock, the cutting edge of the digging teeth 401 is difficult to impact and crush the rock. The digging teeth 401 must repeatedly impact the rock to gradually crush it before a little gravel can be grabbed. This results in a slow progress of the project, which often exceeds the scheduled construction period. Moreover, when the digging tooth 401 repeatedly impacts the rock bed, it is easy to cause edge damage and rapid wear (for example, patent publications TW202248502A, TW202035831A and CN115427641A are to solve this wear problem), or breakage from the welding or bolting parts of the digging tooth 401 and the grab bucket 400 (for example, as described in patent announcement No. M369973 and publication No. CN105862953A).

Therefore, how to solve the problems that the digging efficiency of the digging teeth 401 of the grab bucket 400 of the excavator 100 is reduced when digging into the rock bed, the digging teeth 401 are easily worn, and the digging teeth 401 are easily broken during impact excavation, which are the issues that the reinforced digging teeth of the excavator grab bucket of this invention need to overcome.

The main purpose of this invention is to provide a reinforced digging tooth for an excavator grab bucket, which is provided with a metal reinforcement plate structure and material design at the opening end of the grab bucket, so as to achieve the effects of making the digging teeth of the grab bucket more wear-resistant, increasing the service life of the digging teeth, preventing the digging teeth from breaking from the rear end assembly part, and more effectively impacting and scraping the rock formation to improve the excavation efficiency.

In order to achieve the above-mentioned purpose, the invention of the reinforced digging teeth of the excavator grab bucket, its preferred technical solution includes: a plurality of digging teeth are combined with the lower opening edge of a grab bucket, the rear ends of the digging teeth are fixed to the grab bucket, and the front ends of the digging teeth are formed into a wedge-shaped tip with a cutting edge; and each of the digging teeth is additionally provided with a metal reinforcement plate, the metal reinforcement plate is a straight strip plate with a width smaller than the digging tooth, and the metal reinforcement plate is provided with a metal reinforcement plate. The metal reinforcement plate is arranged parallel to the center line of the digging tooth; the narrow side bottom surface of the metal reinforcement plate is welded to the middle of the inner surface of the digging tooth, so that the metal reinforcement plate is vertically fixed to the inner surface of the digging tooth; the rear end of the metal reinforcement plate extends to the belly of the inner surface of the digging tooth, and the front end of the metal reinforcement plate protrudes from the cutting edge of the digging tooth to form a protruding plate, which is used to impact and scrape the rock layer during excavation.

One of the better technical solutions is that in the reinforced digging teeth of the above-mentioned excavator grab, the metal reinforcing plate has a narrow side top surface opposite to the narrow side bottom surface, and the narrow side top surface is connected to the front end surface of the metal reinforcing plate to form a non-rounded right angle portion or a sharp angle portion.

One of the better technical solutions is that in the reinforced digging teeth of the excavator grab bucket, the metal reinforcement plate is a quadrilateral metal plate.

One of the better technical solutions is that in the reinforced digging teeth of the excavator grab bucket, the metal reinforcement plate is a triangular metal plate.

One of the better technical solutions is that in the reinforced digging teeth of the excavator grab bucket, the digging teeth are cast iron parts or forged parts, and the metal reinforcement plate is a spring steel forged plate.

One of the better technical solutions is that in the reinforced digging teeth of the above-mentioned excavator grab bucket, the rear end of the digging teeth is welded, sleeved or bolted to the lower opening edge of the grab bucket with a pin.

The invention is a reinforced digging tooth of an excavator grab bucket. The following effects can be achieved through a metal reinforcement plate welded on the inner surface of the digging tooth and a protruding plate structure formed by the front end of the metal reinforcement plate protruding from the cutting edge of the digging tooth:

(1) The digging teeth of the grab bucket are more wear-resistant: This invention adopts the design of the metal reinforcement plate and uses spring steel forged plate as its material, which has better hardness and metal strength than the digging teeth. It can adapt to the excavation work on the rock formation, prevent the cutting edge of the digging teeth from being worn, and increase the service life of the digging teeth.

(ii) Preventing the breakage of the rear end of the digging tooth: When the excavator adopts the impact method to dig the rock formation, it is easy to cause the part where the rear end of the digging tooth and the grab bucket are bolted to break. The break may occur at the rear end of the digging tooth, the digging tooth step boss, the pin or the grab bucket, and its repair process will cause project delays. The present invention uses a metal reinforcement plate welded on the inner surface of the digging tooth as a direct impact component on the rock formation. If the impact force is too large, the metal reinforcement plate can be separated from the welding part of the digging tooth, thereby protecting the digging tooth and the grab bucket, and can be quickly re-welded and repaired on site.

(III) More effective impact and scraping of rock formations to improve excavation efficiency: The metal reinforcement plate of this invention is a straight plate with a width smaller than that of the digging tooth, and is made of a spring steel forged plate. A protruding plate is formed on the digging tooth, and the protruding plate has a right angle or a sharp angle, so that the rock formation can be impacted, crushed and scraped more effectively. Experimental construction has greatly shortened the construction period of rock excavation and prevented project delays.

The technical features, structure and other functions, purposes and effects of this invention are described in detail with reference to the attached illustrated embodiments as follows:

Referring to FIG. 2 , the present invention provides a reinforced digging tooth for a grab bucket of an excavator. In a preferred embodiment, a plurality of digging teeth 10 (or bucket teeth) are combined at the lower opening edge of each grab bucket 400 (or shovel bucket) of the excavator 100. The digging teeth 10 are usually made of cast iron or forged parts. The rear ends of the digging teeth 10 are respectively connected to the lower opening edge of the grab bucket 400 through a welding structure or a sleeve structure or by a bolt 30. The front end of the digging tooth 10 is formed into a wedge-shaped tip with a cutting edge 11. The above is a structure of an existing digging tooth 10 installed on a grab bucket 400, and the assembly structure of the digging tooth 10 on the grab bucket 400 is not limited. The technical feature of the invention is that each of the digging teeth 10 is additionally provided with a metal reinforcement plate 20, which is utilized as a wear-resistant and impact-resistant component of the digging teeth 10, and is used to replace the cutting edge portion 11 of the digging teeth 10 to perform impact crushing and scraping on the rock formation.

Referring to FIG. 2, FIG. 3 and FIG. 4, the first preferred embodiment of the metal reinforcing plate 20 of the present invention is implemented as a quadrilateral metal straight strip plate (as shown in FIG. 5) with a width W1 (thickness) less than the width W2 of the tooth 10, preferably cut from a spring steel forged plate; when it is combined with the tooth 10, the metal reinforcing plate 20 is arranged parallel to the center line C of the tooth 10, and the narrow side bottom of the metal reinforcing plate 20 is arranged The metal reinforcing plate 20 is welded to the middle of the inner surface 12 of the digging tooth 10, so that the metal reinforcing plate 20 is vertically fixed to the inner surface 12 of the digging tooth 10; and the rear end 22 of the metal reinforcing plate 20 extends to the flank of the inner surface 12 of the digging tooth 10, and the front end 23 of the metal reinforcing plate 20 protrudes from the cutting edge 11 of the digging tooth 10 to form a protruding plate 24, which is used to impact, crush and scrape the rock formation during excavation. Among them, one of the preferred embodiments of the metal reinforcing plate 20 has a narrow side top surface 25 opposite to the narrow side bottom surface 21, and the narrow side top surface 25 is connected to the front end surface 231 of the metal reinforcing plate 20 to form a non-rounded right angle portion 26 (or a sharp angle portion).

6, 7 and 8, which are the second preferred embodiment of the metal reinforcement plate 20 of the present invention, the metal reinforcement plate 20 can be changed into a triangular metal straight strip plate, and the rest of the structure welded to the tooth 10 is the same as the first preferred embodiment, such as a protruding plate 24 and a right angle portion 26 (or a sharp angle portion), etc.

As shown in FIG9 , when the reinforced digging teeth of the excavator grab bucket of the present invention are used for excavation, the protruding plate 24 at the front end of the metal reinforcing plate 20 can be directed downward toward the surface of the rock formation when the grab bucket 400 is opened, and the rock formation can be impacted, crushed and scraped by utilizing the structure of the protruding plate 24 and the right angle portion 26 (or sharp angle portion); since the metal reinforcing plate 20 of the present invention is made of a spring steel forged plate having better metal strength and wear resistance than the digging teeth 10, it can withstand the impact force and wear exerted on the rock formation by the grab buckets 400 of the excavator 100, and can prevent the cutting edge portion 11 of the digging tooth 10 from being worn, thereby increasing the service life of the digging tooth 10. Furthermore, when the impact force is too great, the welding portion between the metal reinforcing plate 20 and the digging tooth 10 can be separated, thereby protecting the digging tooth 10 and the grab bucket 400, and can be quickly re-welded and repaired on site to avoid project delays.

In summary, this invention, a reinforced digging tooth for the grab bucket of an excavator, is indeed practical and creative. The application of its technical means is undoubtedly novel, and its effect is indeed consistent with the design purpose, which is a reasonable progress. For this reason, a new patent application is filed in accordance with the law. I sincerely request the Jun Bureau to give a detailed review and grant the patent. I am very grateful.

100: Excavator 200: Cable system 300: Crane 301: Boom 400: Grab 401: Digging teeth 10: Digging teeth 11: Cutting edge 12: Inner surface 20: Metal reinforcement plate 21: Narrow side bottom surface 22: Rear end 23: Front end 231: Front end surface 24: Protruding plate 25: Narrow side top surface 26: Right angle part W1, W2: Width C: Center line 30: Latch

Figure 1 is a schematic diagram of a conventional excavator installed on a crane and its construction status. Figure 2 is a schematic diagram of a side view of a single-sided grab bucket and its excavating teeth of the excavator of the present invention. Figure 3 is a schematic diagram of a three-dimensional excavating tooth and a quadrilateral metal reinforcing plate of the present invention. Figure 4 is a schematic diagram of a side view of the excavating tooth and a quadrilateral metal reinforcing plate of the present invention. Figure 5 is a schematic diagram of a front view of the excavating tooth and a quadrilateral metal reinforcing plate of the present invention. Figure 6 is a schematic diagram of a three-dimensional excavating tooth and a triangular metal reinforcing plate of the present invention. Figure 7 is a schematic diagram of a side view of the excavating tooth and a triangular metal reinforcing plate of the present invention. Figure 8 is a schematic diagram of a front view of the excavating tooth and a triangular metal reinforcing plate of the present invention. Figure 9 is a schematic diagram of the excavation action of the reinforced excavating tooth of the excavator grab bucket of the present invention.

10: Digging teeth

11: Cutting edge

12: Inside

20: Metal reinforcement plate

21: Narrow side bottom

22: Backend

23: Front-end

231: Front face

24: Protruding plate

25: Narrow edge top

26:Right angle part

30: Latch

Claims (6)

A reinforced digging tooth of an excavator grab bucket comprises: a plurality of digging teeth are combined at the lower opening edge of a grab bucket, the rear ends of the digging teeth are fixed to the grab bucket, the front ends of the digging teeth are formed into a wedge-shaped tip with a cutting edge, and the characteristics are: each of the digging teeth is additionally provided with a metal reinforcing plate, the metal reinforcing plate is a straight strip plate with a width smaller than that of the digging tooth, and the metal reinforcing plate is connected to the digging tooth. The metal reinforcement plate is arranged parallel to the center line; the narrow side bottom surface of the metal reinforcement plate is welded to the middle of the inner surface of the digging tooth, so that the metal reinforcement plate is vertically fixed to the inner surface of the digging tooth; the rear end of the metal reinforcement plate extends to the belly of the inner surface of the digging tooth, and the front end of the metal reinforcement plate protrudes from the cutting edge of the digging tooth to form a protruding plate, which is used to impact and scrape the rock layer during excavation. The reinforced digging teeth of the excavator grab as described in claim 1, wherein the metal reinforcing plate has a narrow side top surface opposite to the narrow side bottom surface, and the narrow side top surface is connected to the front end surface of the metal reinforcing plate to form a non-rounded right angle or a sharp angle. The reinforced digging teeth of the excavator grab as described in claim 1 or 2, wherein the metal reinforcement plate is a quadrilateral metal plate. The reinforced digging teeth of the excavator grab as described in claim 1 or 2, wherein the metal reinforcement plate is a triangular metal plate. The reinforced digging tooth of the excavator grab as described in claim 1 or 2, wherein the digging tooth is a cast iron part or a forged part, and the metal reinforcement plate is a spring steel forged plate. A reinforced digging tooth of an excavator grab as described in claim 1, wherein the rear end of the digging tooth is welded, socketed or bolted to the lower opening edge of the grab with a pin.

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