Patent Application
20150360361
The present disclosure relates to a work tool assembly of a machine, and more particularly to a hammer tool assembly associated with the machine.
Machines utilize a variety of tools, such as for example a powered hammer, for performing tasks. The hammer may be used in in cutting through rocks, demolition of structure, etc. The hammer generally includes a housing assembly having side plates, a power cell and a tool extending from the housing. The housing is coupled to the power cell using mechanical fasteners. During operation, the tool strikes against various work surfaces resulting in disintegration of material. Due to the impact and load transfer to the hammer during operation, the bolts experience fatigue. The side plates, generally having a C-shaped cross section, are prone to wear and damage. In some situations side bolts of the hammer are subject to side loads during operation in confined spaces. This may lead to bending or deformation of the side plates. Accordingly an overall operation, efficiency, and productivity of the machine may be affected due to increase in machine downtime.
U.S. Pat. No. 5,419,404, hereinafter referred as the '404 patent, describes a hydraulic impact hammer having a protective casing. The protective casing is made of two side plates. Further, the protective casing is provided with attenuation elements for eliminating the noise and vibration caused by the impact hammer The attenuation elements are arranged in the side plates of the protective casing in a manner such that the attenuation elements can be compressed in at least three directions of the housing while fastening the side plates to each other. However, the '404 patent does not provide a robust design of the hammer for preventing wear and failure of the side plates and the side bolts of the hammer.
In one aspect of the present disclosure, a hammer tool assembly for a machine is provided. The hammer tool assembly includes a power cell defining a first axis. The hammer tool assembly also includes a tool coupled to one end of the power cell. A frame assembly is coupled to the power cell. The frame assembly includes a first side plate and a second side plate. The first and second side plates are positioned in surrounding contact with the power cell. Further, the each of the first and second side plates has an I-shaped cross section along the first axis and a second axis. The second axis is perpendicular to the first axis. The hammer tool assembly includes a flange member having a plurality of serrations that extend from an outer periphery of an outer wall of at least one of the first and second side plates. The flange member extends perpendicular to the second axis along a third axis. The third axis is perpendicular to the first and second axes respectively. The hammer tool assembly includes a plurality of blocks provided in surrounding contact with the power cell and an inner wall of the first and second side plates respectively. The plurality of blocks is positioned proximate to the one end of the power cell. Further, the plurality of blocks is spaced apart from each other with respect to the first axis. Mounting bores are positioned at one end of the first and second side plates respectively. The mounting bores are arranged to coaxially align with corresponding openings provided on respective sides of each of the plurality of blocks such that the mounting bores and the corresponding openings are configured to receive mechanical fasteners therethrough.
Other features and aspects of this disclosure will be apparent from the following description and the accompanying drawings.
Wherever possible, the same reference numbers will be used throughout the drawings to refer to same or like parts. Moreover, references to various elements described herein are made collectively or individually when there may be more than one element of the same type. However, such references are merely exemplary in nature. Any reference to elements in the singular is also to be construed to relate to the plural and vice-versa without limiting the scope of the disclosure to the exact number or type of such elements unless set forth explicitly.
Referring to
The machine 100 includes a frame 106 and one or more linkages 108, 110. The linkages 108, 110 may be articulated relative to the frame 106 in order to change an orientation and/or position of the hydraulic hammer with respect to a ground surface (not shown). The hammer tool assembly 102 has a flat top design (see
Referring to
The second end 126 of the power cell 118 is coupled to the tool 104. The tool 104 includes a notch 132 provided thereon. The notch 132 on the tool 104 is aligned with the opening 123 to receive a fastener 141 therethrough. The power cell 118 drives the tool 104 of the hammer tool assembly 102 so that the tool 104 performs functions like cutting through rocks, demolition of structure, etc.
Referring to
Each of the first and second side plates 142, 144 has an inner wall 146 facing the power cell 118 and an outer wall 148 facing away from the power cell 118. The first and second side plates 142, 144 include a number of mounting bores 156 formed along the third axis C-C′. The mounting bores 156 are positioned proximate to the second end 126 of the power cell 118. The mounting bores 156 are arranged in such a manner that the mounting bores 156 coaxially align with the corresponding holes 136 of the blocks 134. Mechanical fasteners 158 are received into the mounting bores 156 of the first side plate 142 and the corresponding holes 136 of the blocks 134, and also the second side plate 144 and corresponding holes 136 of the blocks 134. The mechanical fasteners 158 couple the first and second side plates 142, 144 with the blocks 134. The mechanical fasteners 158 are embodied as threaded bolts having a relatively short length such that the length of the mechanical fasteners 158 is sufficient to engage with the respective side plate 142, 144 and the blocks 134. In alternate embodiments, the mechanical fasteners 158 may be turning pins, and the like. Four mechanical fasteners 158 are shown in association with the first and second side plates 142, 144 respectively. Alternatively, additional number of mechanical fasteners 158 may be used based on the application.
A flange member 150 along an outer periphery 152 of the outer wall 148 of the first and second side plates 142, 144 respectively. More particularly, the flange member 150 extends from the outer periphery 152 of the outer wall 148. The flange member 150 extends along the third axis C-C′. The flange member 150 is provided on the first and second side plates 142, 144. Alternatively, the flange member 150 is provided on any one of the first and second side plates 142, 144. The flange member 150 is provided along the entire length of the outer periphery 152 of the outer wall 148. Alternatively, the flange member 150 is provided on a bottom portion of the hammer tool assembly 102 proximate to the tool 104. A thickness and length of the flange member 150 may vary based on the application.
Additionally or optionally, a reinforcement member 153 is attached to the flange member 150 at the bottom portion of the hammer tool assembly 102. The reinforcement member 153 is attached to the first and second side plates 142, 144. Alternatively, the reinforcement member 153 may be attached to any one of the first and second side plates 142, 144. The flange member 150 includes a number of serrations 154 provided thereon. The serrations 154 extend outwards from the flange member 150. The serrations 154 are provided at the bottom portion of hammer tool assembly 102 proximate to the second end 126 of the power cell 118 more specifically, the serrations 154 are provided proximate to the portion of the hammer tool assembly 102 including the mechanical fasteners 158. Alternatively, the serrations 154 may be provided along an entire periphery of the flange member 150. The serrations 154 are provided on the first and second side plates 142, 144. Further, the serrations 154 are provided on the reinforcement member 153 corresponding to the serrations 154 provided on the flange member 150. Alternatively, the serrations 154 may be provided on any one of the first and second side plates 142, 144.
The present disclosure relates to the hammer tool assembly 102. The hammer tool assembly 102 includes the first and second side plates 142, 144. The first and second side plates 142, 144 have the I-shaped cross section.
The I-shaped cross section of the first and second side plates 142, 144 provides rigidity to the hammer tool assembly 102. During side loading the I-shaped sectioned provides stability and inhibits bending of the hammer tool assembly 102. The serrations 154 on the flange member 150 prohibit wear of the outer wall 148 of the hammer tool assembly 102. Further the serrations 154 secure the mechanical fasteners 158 during operation of the hammer tool assembly 102.
While aspects of the present disclosure have been particularly shown and described with reference to the embodiments above, it will be understood by those skilled in the art that various additional embodiments may be contemplated by the modification of the disclosed machines, systems and methods without departing from the spirit and scope of what is disclosed. Such embodiments should be understood to fall within the scope of the present disclosure as determined based upon the claims and any equivalents thereof.
