This disclosure relates to a retainer insertion and extraction tool for bit assemblies used in mining, highway construction, and trenching equipment.
Mining, highway construction, and trenching equipment is operated using a rotatable, cylindrical drum or chain that includes a plurality of bit holder blocks mounted onto the drum or chain in a herringbone, V-shape, or spiral configuration. The equipment utilizes bits traditionally set in a bit assembly having a bit holder, and/or bit sleeve, and a bit holder block. The bit holder or bit sleeve is retained within a bore in the bit holder block. The combinations of bit assemblies have been utilized to remove material from the terra firma, such as degrading the surface of the earth, minerals, cement, concrete, macadam or asphalt pavement. The forces and vibrations exerted on the bit assemblies from the harsh road degrading environment may cause the bit holder to move within the bore of the bit holder block. Retainers have been used to allow bit rotational movement and to retain the bit within the bit holder, the bit sleeve, and/or the bit holder block. As bits are worn through underground mining, the retainer needs to be removed and the bit needs to be replaced. A retainer insertion and extraction tool can facilitate both removal of the retainer from the worn out bit and insertion of a new retainer around a new bit shank. The retainer insertion and extraction tool allows for quick removal and insertion of the retainer while requiring the user to exert minimal force for removal and insertion of the retainer.
This disclosure relates generally to bit assemblies for mining, highway construction, and trenching equipment. One implementation of the teachings herein is a tool for insertion and extraction of a retainer that includes a first shaft; a second shaft extending past a distal end of the first shaft; and a receiving component laterally extending from a forward end of the first shaft, the receiving component adapted to receive the retainer.
These and other aspects of the present disclosure are disclosed in the following detailed description of the embodiments, the appended claims and the accompanying figures.
The various features, advantages, and other uses of the apparatus will become more apparent by referring to the following detailed description and drawings, wherein like reference numerals refer to like parts throughout the several views. It is emphasized that, according to common practice, the various features of the drawings are not to-scale. On the contrary, the dimensions of the various features are arbitrarily expanded or reduced for clarity.
Mining, highway construction, and trenching equipment is operated using a rotatable, cylindrical drum or chain that includes a plurality of bit holder blocks mounted onto the drum or chain in a herringbone, V-shape, or spiral configuration. The equipment utilizes bits traditionally set in a bit assembly having a bit holder, and/or bit sleeve, and a bit holder block. The bit holder or bit sleeve is retained within a bore in the bit holder block, hereinafter referred to as base blocks. The combinations of bit assemblies have been utilized to remove material from the terra firma, such as degrading the surface of the earth, minerals, cement, concrete, macadam or asphalt pavement. The forces and vibrations exerted on the bit assemblies from the harsh road degrading environment may cause the bit holder to move within the bore of the base block. Retainers have been used to allow bit rotational movement and to retain the bit within the bit holder, bit sleeve, and/or base block. As bits are worn through underground mining, the retainer needs to be removed and the bit needs to be replaced. A retainer insertion and extraction tool can facilitate both removal of the retainer from the worn out bit and insertion of a new retainer around a new bit shank. The retainer insertion and extraction tool allows for quick removal and insertion of the retainer while requiring the user to exert minimal force for removal and insertion of the retainer.
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While the present disclosure has been described in connection with certain embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims, which scope is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures as is permitted under the law.
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