Connecting structure for trolley tine and tine holder

Abstract

A link structure between cutting teeth and a tooth holder comprises the cutting teeth, the tooth holder and pins. The tooth holder comprises a tooth holder head on the front part and a tooth holder connecting piece on the rear part, wherein, the tooth holder head on the front part is connected with the front cutting teeth, and the tooth holder connecting piece on the rear part is used for fixing the tooth holder onto the strickle of a bucket. The cutting teeth consists of a tooth tip part and a cutting teeth cavity, wherein, the cutting tooth cavity comprises a cutting tooth inner cavity and a cutting tooth outer cavity, and the tooth holder head is held by the cutting tooth inner cavity, is embedded into the cutting tooth inner cavity and is connected with the cutting tooth inner cavity through pins. The link structure is characterized in that: the elastic pins are arranged inside the pin holes of the tooth holder head, and pin locking holes are correspondingly arranged on the wall of the cutting tooth inner cavity or the extending part of the inner cavity wall to enable adaptation and connection between the elastic pins and the pin locking holes, thereby enabling detachable connection between the cutting teeth and the tooth holder. The link structure can easily fix the cutting teeth and the tooth holder together and enable easy replacement of the cutting teeth, thereby improving the operating efficiency of assembling and disassembling the cutting teeth, reducing the labor intensity of operators, and reducing use cost.

Description

technical field [0001] The invention relates to a connection structure between a bucket tooth and a tooth seat, which is mainly applied to the fixed connection of the bucket tooth and the tooth seat on excavators and loaders on engineering machinery and mining machinery. Background technique [0002] Pins are often used for the fixed connection of bucket teeth and tooth seats on excavators and loaders on construction machinery and mining machinery. At present, the fixed pins for bucket teeth and tooth seats are mainly divided into horizontal pins and vertical pins. Two categories. [0003] Horizontal pins are roughly divided into two categories: one is that there is a groove on the pin with a C-shaped circlip (Figure 1), the inner diameter of the circlip is slightly larger than the diameter of the groove of the pin, and the outer diameter is slightly larger than that of the pin hole. Inner diameter, the assembled pin penetrates into the pin hole of the tooth seat, and is lo...

AI Technical Summary

Problems solved by technology

[0006] 1) Regardless of whether it is a horizontal pin or a vertical pin, it is basically put in and taken out by hitting with a hammer. Every time the bucket teeth are changed, the pin must be removed and reinstalled. Vibration, impact, and friction have greatly damaged the performance of the pin. This "non-combat attrition" damage has greatly shortened the life of the pin. Every time the bucket teeth are assembled or replaced, the pin must be taken out. , is also a time-consuming and labor-intensive labor, especially when doing this work on the construction site, it shows its inconvenience;

[0007] 2) The pin is born in response to the cooperation between the bucket tooth and the tooth seat. The pin of this structure determines that it will be continuously subjected to shearing, torsional force and other forces during use. Fatigue failure will occur soon under stress, so the service life is generally not very long. Often, several or even dozens of pairs of pins need to be replaced during the life cycle of a pair of tooth seats, and the cost of use is relatively high.

However, there is no reliable contact and fixation of the left and right directions of the bucket teeth, and the side-to-side shaking is relatively obvious. This reverses the bucket teeth during the excavation process and reduces the bearing capacity of side loads. In some cases, this bearing capacity is even lost, resulting in bucket teeth Accidents such as breakage, serious deformation failure, pin breakage, etc., make the excavation work stop and cause greater losses

At the same time, because the left and right sides of this fit cannot provide favorable support, excessive tension on both sides will also cause cracks on the side walls on both sides, and then fracture failure will occur.

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