The present disclosure relates to a boom assembly. More particularly, the present disclosure relates to the boom assembly for a machine, such as a pipelayer, and a method of assembling the boom assembly on the machine.
A machine, such as a pipelayer, includes a boom assembly for lifting and lowering loads during a pipelaying operation. The boom assembly includes a number of components, such as a boom member, an upper boom block, a lower boom block, an upper hook block, a lower hook block, and so on. Typically, during transportation of the machine from one location to another location, the boom assembly is disassembled at one location and transported to a desired location in a disassembled configuration relative to the machine. The boom assembly is then reassembled on the machine at the desired location prior to the pipelaying operation.
During assembly, the upper boom block is lifted using a lifting rope and a lifting machine, such as an excavator or crane, in order to couple the upper boom block to the boom member. In many situations, the lifting rope is wrapped and secured around the upper boom block by one or more protrusions on the upper boom block, such as protruding edges, protruding bolts and nuts, and so on. Also, during assembly, the upper hook block is lifted using the lifting rope and the lifting machine in order to couple the upper hook block to the boom member. In many situations, the lifting rope is wrapped and secured around the upper hook block by one or more protrusions on the upper hook block, such as protruding edges, protruding bolts and nuts, and so on.
However, such an arrangement of securing the lifting rope around the upper boom block and the upper hook block is a potential safety hazard. More specifically, during lifting, the upper boom block and/or the upper hook block may slip from the respective lifting rope. As such, the upper boom block and/or the upper hook block may fall from a substantial height and may be damaged. In some situations, the upper boom block and/or the upper hook block may fall on the machine, in turn, damaging the machine. In some situations, the upper boom block and/or the upper hook block may fall, in turn, forming a pinch point between the upper boom block and nearby personnel or equipment, and/or between the upper hook block and nearby personnel or equipment. Hence, there is a need for an improved boom assembly and an improved method for assembling the boom assembly on the machine.
U.S. Pat. No. 4,666,049 discloses an articulated arm-type excavator machine. The machine includes a hydraulically actuated main boom and a side boom detachably mounted at a proximal end to a side of the machine. The machine also includes a trolley arrangement on an underside of the main boom. A detachable side boom arrangement enables the machine to be employed either as an excavator or as a side boom lifting device.
In an aspect of the present disclosure, a boom assembly for a pipelayer is provided. The boom assembly includes a boom member having a first end and a second end. The second end is disposed opposite to the first end. The first end of the boom member is adapted to be removably coupled to an undercarriage of the pipelayer. The boom assembly includes a first boom block adapted to be removably coupled to the second end of the boom member. The boom assembly includes a second boom block adapted to be removably coupled to a chassis of the pipelayer. The second boom block is operably coupled to the first boom block using at least one first cable. The boom assembly includes a first hook block adapted to be removably coupled to the second end of the boom member. The first hook block is disposed opposite to the first boom block. The boom assembly includes a second hook block adapted to be operably coupled to the first hook block using at least one second cable. The boom assembly also includes a first lifting connector disposed on the first boom block. The boom assembly further includes a second lifting connector disposed on the first hook block. Each of the first lifting connector and the second lifting connector is adapted to removably receive a lifting strap therethrough.
In another aspect of the present disclosure, a pipelayer is provided. The pipelayer includes a chassis and an undercarriage coupled to the chassis. The pipelayer includes a boom member having a first end and a second end. The second end is disposed opposite to the first end. The first end of the boom member is adapted to be removably coupled to the undercarriage. The pipelayer includes a first boom block adapted to be removably coupled to the second end of the boom member. The pipelayer includes a second boom block adapted to be removably coupled to the chassis. The second boom block is operably coupled to the first boom block using at least one first cable. The pipelayer includes a first hook block adapted to be removably coupled to the second end of the boom member. The first hook block is disposed opposite to the first boom block. The pipelayer includes a second hook block adapted to be operably coupled to the first hook block using at least one second cable. The pipelayer also includes a first lifting connector disposed on the first boom block. The pipelayer further includes a second lifting connector disposed on the first hook block. Each of the first lifting connector and the second lifting connector is adapted to removably receive a lifting strap therethrough.
In yet another aspect of the present disclosure, a method for assembling a boom assembly on a pipelayer is provided. The method includes aligning a first end of a boom member relative to an undercarriage of the pipelayer. The method includes hingedly coupling the first end of the boom member to the undercarriage. The method includes providing a first lifting connector on a first boom block. The method includes providing a first lifting strap through the first lifting connector. The method includes lifting the first boom block using the first lifting strap by the first lifting connector. The method includes aligning the first boom block relative to a second end of the boom member. The method includes hingedly coupling the first boom block to the second end of the boom member. The method includes providing a second lifting connector on a first hook block. The method includes providing a second lifting strap through the second lifting connector. The method includes lifting the first hook block using the second lifting strap by the second lifting connector. The method also includes aligning the first hook block relative to the second end of the boom member. The method further includes hingedly coupling the first hook block to the second end of the boom member.
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 the same or the like parts. Referring to
The undercarriage 104 includes a set of track roller frames, such as a first track roller frame 108 and a second track roller frame 110. The first track roller frame 108 includes a first track 112, and the second track roller frame 110 includes a second track 114. Each of the first track 112 and the second track 114 supports and provides mobility to the pipelayer 100 on the ground surface 106. Additionally, each of the first track roller frame 108 and the second track roller frame 110 may include additional components (not shown), such as a drive sprocket, one or more idlers, one or more rollers, and so on, based on application requirements.
The pipelayer 100 also includes a counterweight system 116. The counterweight system 116 is disposed adjacent to the second track roller frame 110. The counterweight system 116 includes one or more counterweights 118 disposed on a counterweight frame 120. The counterweight frame 120 is movably coupled to the pipelayer 100 using a set of arms, such as lower arms 122 and upper arms 124 (only one upper arm shown in the accompanying figure). More specifically, each of the lower arms 122 are movably coupled to each of the second track roller frame 110 and the counterweight frame 120. Also, each of the upper arms 124 are movably coupled to each of the chassis 102 and the counterweight frame 120. Additionally, the counterweight system 116 includes one or more actuators, such as a hydraulic actuator 126, operably coupled between the chassis 102 and the counterweight frame 120. Based on an operation of the hydraulic actuator 126, the counterweight frame 120 and the counterweights 118 are adapted to move between a retracted position (shown in the accompanying figure) and an extended position (not shown) relative to the chassis 102 of the pipelayer 100. As such, based on the position of the counterweights 118, the counterweight system 116 is adapted to provide a variable load lifting capacity of the pipelayer 100.
The pipelayer 100 includes an enclosure 128 mounted on the chassis 102. The enclosure 128 houses a power source (not shown), such as an engine, batteries, and the like, of the pipelayer 100. The power source provides power to the pipelayer 100 for operational and mobility requirements. The pipelayer 100 also includes an operator cabin 130 mounted on the chassis 102. The operator cabin 130 includes various controls (not shown), such as a steering, a joystick, an operator console, an operator seat, levers, pedals, buttons, switches, knobs, and the like. The controls are adapted to control the pipelayer 100 on the ground surface 106 and during the pipelaying operation. Additionally, the pipelayer 100 may include one or more components and/or systems (not shown), such as a propulsion system, a drivetrain, a hydraulic system, a fuel control system, an engine control system, an air delivery system, a lubrication system, a cooling system, a drive control system, a machine control system, and so on, based on application requirements.
The pipelayer 100 further includes a boom assembly 132 operably coupled to the undercarriage 104 and the chassis 102. The boom assembly 132 is adapted to lift and lower the load during the pipelaying operation. It should be noted that although the boom assembly 132 is described herein with reference to the pipelayer 100, in other embodiments, the boom assembly 132 may be adapted to be employed on any other lifting machine, such as a crane. The boom assembly 132 includes a boom member 134. In the illustrated embodiment, the boom member 134 includes two leg segments, such as a first leg segment 136 and a second leg segment 138. As such, in the illustrated embodiment, the boom member 134 has a substantially elongated and triangular configuration. In other embodiments, the boom member 134 may include single or multiple leg segments, based on application requirements.
The boom member 134 includes a first end 140 and a second end 142. The second end 142 is disposed opposite to the first end 140. The first end 140 is removably coupled to the undercarriage 104 of the pipelayer 100. More specifically, the first end 140 of the boom member 134 is removably and hingedly coupled to the first track roller frame 108 using two first hinge pins 402, 404 (shown in
The boom assembly 132 includes a first boom block 144. The first boom block 144 is removably coupled to the second end 142 of the boom member 134. More specifically, the first boom block 144 is removably and hingedly coupled to the second end 142 of the boom member 134 using a second hinge pin 202 (shown in
The boom assembly 132 includes a first hook block 150 removably coupled to the second end 142 of the boom member 134. The first hook block 150 is disposed opposite to the first boom block 144 on the second end 142 of the boom member 134. More specifically, the first hook block 150 is removably and hingedly coupled to the second end 142 of the boom member 134 using a third hinge pin 302 (shown in
The boom assembly 132 also includes a first lifting connector 156. The first lifting connector 156 will be hereinafter interchangeably referred to as the “first connector 156”. The first connector 156 is disposed on the first boom block 144. Referring to
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The present disclosure relates to a method of assembling the boom assembly 132 on the pipelayer 100. Referring to
The lifting machine is then operated in order to lift and move the boom member 134 using the boom lifting strap 410. Further, the first end 140 of the boom member 134 is aligned adjacent to the first track roller frame 108 using the boom lifting strap 410 and the lifting machine. At step 504 and still referring to
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In some situations, as shown in the accompanying figures, the second end 142 of the boom member 134 is lifted relative to the ground surface 106 in order to provide improved workability around the second end 142 of the boom member 134. More specifically, the first cable 148 operably coupled between the first boom block 144 and the second boom block 146 may be operated using the respective winch in order to lift the second end 142 of the boom member 134 relative to the ground surface 106. At step 524 and still referring to
Each of the first connector 156, 212, 218 and the second connector 158, 312, 318 provides a simple, effective, and cost-efficient method of securing the first boom block 144 and the first hook block 150, respectively, to the respective lifting strap. As such, each of the first connector 156, 212, 218 and the second connector 158, 312, 318 may be securely lifted and moved during assembly of the boom assembly 132. Accordingly, a possibility of dropping the first connector 156, 212, 218 and the second connector 158, 312, 318 during assembly of the boom assembly 132 may be reduced, in turn, improving safety and reducing damage related costs.
Each of the first connector 156, 212, 218 and the second connector 158, 312, 318 includes a simple design and may be available as off-the-shelf components, in turn, reducing complexity and costs. The first connector 156, 212, 218 and the second connector 158, 312, 318 may be provided on any boom block and/or hook block with little or no modification to existing design, in turn, improving flexibility and compatibility. Further, the method 500 provides a simple, effective, and systematic process for assembling the boom assembly 132 on the pipelayer 100, in turn, reducing labor effort, reducing assembly time, reducing machine downtime, and reducing costs.
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 the disclosure. Such embodiments should be understood to fall within the scope of the present disclosure as determined based upon the claims and any equivalents thereof