The present disclosure relates to a cable connecting assembly for a machine, a contact terminal of the cable connecting assembly, and a connecting device of the cable connecting assembly.
Machines, such as off-highway trucks, wheel dozers, etc. include electric power systems or hybrid (for e.g., diesel-electric) power systems that are used to provide power for propulsion, implement movement, and other operations. Generally, such power systems include high-voltage cables for electrically connecting an electric motor (or a generator) with an inverter of the machine. A busbar is fixedly connected to a housing of the inverter. The high-voltage cables may be connected to the busbar to establish an electric connection via the high-voltage cables. Further, in order to connect the high-voltage cable with the busbar, a lug connector is crimped to the high-voltage cable. Moreover, an electrically conductive receptacle is connected between a corresponding high-voltage cable and the lug connector
In order to connect the lug connector with the busbar, openings in the lug connector and openings in the busbar align with each other for receiving one or more fastener that removably couple the lug connector with the busbar. During an assembly of the high-voltage cable, the openings in the lug connector need to be in alignment with the openings in the busbar. However, the orientation of the lug connector may be cumbersome to control, and the lug connector may have a different orientation relative to the busbar. In order to ensure accurate orientation of the lug connector, the lug connector and/or the high-voltage cable may require twisting. Typically, the high-voltage cables are stiff and large in diameter, which may make the high-voltage cables difficult to twist. Moreover, specialized tooling and/or set-ups may be required to twist the high-voltage cables in order to align the lug connector with the busbar. In some cases, attempts to twist the lug connector may damage the lug connector or the high-voltage cable, which may not be desirable.
Further, the current process of the assembly the high-voltage cables may be time consuming and may warrant considerable human effort. Moreover, assembly time may be dependent on the expertise of an assembly personnel, and novice assembly personnel may require more time to assemble as compared to experienced assembly personnel. Overall, the current design of the lug connector and the busbar as well as the process of assembling the lug connector and the busbar may be time consuming, may increase required human effort, and may be costly.
U.S. Pat. No. 8,602,829 describes a lug having an integrated shoe for fastening the lug to a conductor and a terminal of a circuit breaker. The lug includes a housing and a cavity in the housing configured to receive the electrical conductor. The shoe has a hinge connecting the shoe to an inner wall of the housing. A slot is located adjacent to the shoe such that the shoe is positioned between the cavity and the slot, which receives the terminal. A hole in the housing receives a fastener that extends into the cavity. A force applied to the fastener urges the conductor to clamp against the shoe to cause it to deflect about the hinge and to press against the terminal to hold the lug in a secure relationship relative to the terminal and to hold the conductor in a secure relationship relative to the lug.
In an aspect of the present disclosure, a cable connecting assembly for a machine is provided. The cable connecting assembly includes a cable. The cable connecting assembly also includes a contact terminal configured to connect with the cable. The contact terminal includes a first body portion defining a first diameter, a first end, and a second end opposite the first end. The first body portion extends along a first distance between the first end and the second end. The contact terminal also includes a second body portion extending from the first body portion and defining a second diameter, wherein the second diameter is greater than the first diameter of the first body portion. The cable connecting assembly further includes a connecting device configured to connect with the contact terminal. The connecting device extends along a longitudinal axis. The connecting device includes a connecting plate. The connecting plate includes a first portion. The connecting plate also includes a second portion connected to the first portion. The second portion defines a first side and a second side, such that the second portion is connected to the first portion at the first side. The connecting device also includes a bracket configured to removably connect with the second portion of the connecting plate, such that the bracket and the second portion are together configured to removably connect the contact terminal with the connecting device. The connecting device further includes at least one coupling device configured to removably connect the bracket with the second portion of the connecting plate.
In another aspect of the present disclosure, a contact terminal for a cable is provided. The contact terminal includes a first body portion defining a first diameter, a first end, and a second end opposite the first end. The first body portion extends along a first distance between the first end and the second end. The contact terminal also includes a second body portion extending from the first body portion and defining a second diameter. The second diameter is greater than the first diameter of the first body portion.
In yet another aspect of the present disclosure, a connecting device for a machine is provided. The connecting device is configured to connect with a cable. The connecting device extends along a longitudinal axis. The connecting device includes a connecting plate. The connecting plate includes a first portion. The connecting plate also includes a second portion connected to the first portion. The second portion defines a first side and a second side, such that the second portion is connected to the first portion at the first side. The connecting device also includes a bracket configured to removably connect with the second portion of the connecting plate, such that the bracket and the second portion are together configured to removably connect the cable with the connecting device. The connecting device further includes at least one coupling device configured to removably connect the bracket with the second portion of the connecting plate.
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 like parts. Referring to
The machine 100 includes a frame 102. The frame 102 supports various components of the machine 100. The frame 102 includes a front frame 104 and a rear frame 106. The machine 100 also includes an operator cabin 108 supported by the rear frame 106. The operator cabin 108 may include one or more controls (not shown), such as, joysticks, pedals, levers, buttons, switches, knobs, audio visual devices, operator consoles, a steering wheel, and the like. The controls may enable an operator to control the machine 100 during operation. The machine 100 includes a hood 110 mounted on the rear frame 106. Further, the machine 100 includes a drive system 115 supported by the frame 102. In an example, the drive system 115 may include an electric drive system. In the illustrated example, the drive system 115 includes a hybrid drive system. For example, the drive system 115 may include a combination of diesel and electric components.
The frame 102 supports a pair of front wheels 112 and a pair of rear wheels 114. The front wheels 112 and the rear wheels 114 provide support and mobility to the machine 100 on grounds. Alternatively, the machine 100 may include tracks instead of the front and rear wheels 112, 114.
The machine 100 also includes a linkage assembly 116. The linkage assembly 116 is movably coupled to the frame 102. The machine 100 further includes a work tool 118 movably coupled to the frame 102 via the linkage assembly 116. The work tool 118 is embodied as a bucket that may be used for loading/unloading purposes. In some examples, the work tool 118 may be any other type of work tool known in the art that may be used in any work machine or vehicle. The work tool 118 may be used to perform one or more work operations, such as, loading, stock piling, dumping, and the like.
The contact terminal 124 also includes a second body portion 132 extending from the first body portion 126. The second body portion 132 defines a second diameter D2. The second diameter D1 is greater than the first diameter D1 of the first body portion 126. In the illustrated embodiment of
The contact terminal 124 further includes an annular projection 134 extending from the first body portion 126. The annular projection 134 is axially spaced apart from the second body portion 132. Further, the annular projection 134 is disposed between the first and second ends 128, 130 of the first body portion 126. Both the second body portion 132 and the annular projection 134 are optional and can be omitted from example embodiments.
Referring again to
Sections of connecting device 136 extend along a longitudinal axis A1. The connecting device 136 also includes a section that further extends along a vertical axis V1 that is orthogonal to the longitudinal axis A1.
The connecting plate 138 includes a first portion 140. In some examples, the first portion 140 may have a rectangular shape. The first portion 140 may define one or more holes 154 extending orthogonally to the longitudinal axis A1. In some examples, the one or more holes 154 may allow an electronic circuit (not shown), such as, a printed circuit board (PCB) or a printed circuit assembly (PCA) to couple to the first portion 140 of the connecting plate 138 via a fastening means (not shown). The one or more holes 154 may have a circular shape, a rectangular shape, a square shape, a slotted shape, and the like. In the illustrated embodiment of
The connecting plate 138 also includes a second portion 142 connected to the first portion 140. In some examples, the first portion 140 of the connecting plate 138 may be offset from the second portion 142 of the connecting plate 138 along the vertical axis V1 that is orthogonal to the longitudinal axis A1. More particularly, the first portion 140 may be spaced apart from the second portion 142 along the vertical axis V1. In some examples, the first portion 140 of the connecting plate 138 defines a first length L1 along the longitudinal axis A1. Further, the second portion 142 of the connecting plate 138 defines a second length L2. The first length L1 is greater than the second length L2. In some examples, the first portion 140 can lie in a first plane, the second portion 142 can lie in a second plane, and the first and second planes can be parallel to one another.
The connecting plate 138 further includes an intermediate portion 152. The intermediate portion 152 connects the first portion 140 to the second portion 142. In the illustrated embodiment of
The second portion 142 defines a first side 144 and a second side 146, such that the second portion 142 is connected to the first portion 140 at the first side 144. The second portion 142 includes an elongate, first curved section 148. The second portion 142 defines a first slot 150 extending orthogonally to the first curved section 148. Particularly, the first slot 150 extends along the vertical axis V1 that is orthogonal to the longitudinal axis A1. Further, the second portion 142 defines a first planar surface 168 and a second planar surface 170, such that the first curved section 148 is disposed between the first planar surface 168 and the second planar surface 170.
The connecting plate 138 also defines one or more first openings 160 disposed on the second portion 142 along the longitudinal axis A1. Particularly, the first openings 160 are disposed on either side of the first curved section 148 of the connecting plate 138. In other words, the first openings 160 are disposed on the first planar surface 168 and the second planar surface 170 of the second portion 142. In the illustrated embodiment of
It should be noted that the connecting device 136 has a uniform thickness T1 along the vertical axis V1. More particularly, the first portion 140, the second portion 142, and the intermediate portion 152 of the connecting device 136 have the same thickness T1. In other examples, the first portion 140, the second portion 142, and the intermediate portion 152 of the connecting device 136 may have different thicknesses.
Referring now to
The bracket 156 defines one or more second openings 162. Particularly, the second openings 162 are disposed on either side of the second curved section 158 of the connecting plate 138. In the illustrated embodiment of
Referring now to
With reference to
Further, when the contact terminal 124 is connected to the connecting device 136, the first body portion 126 at least partially contacts each of the second portion 142 of the connecting plate 138 and the bracket 156 along the first distance S1. Furthermore, when the contact terminal 124 is connected to the connecting device 136, at least a portion of the second body portion 132 is received within the first slot 150 of the second portion 142. Moreover, when the contact terminal 124 is connected to the connecting device 136, the annular projection 134 at least partially abuts the second side 146 of the second portion 142.
Further, the connecting plate 138 of the cable connecting assembly 220 includes one or more first projections 268 extending along the vertical axis V1. Particularly, the second portion 142 of the connecting plate 138 includes the first projections 268. In the illustrated embodiment of
Moreover, the bracket 156 of the connecting device 136 of the cable connecting assembly 220 includes one or more second projections 270 extending along the vertical axis V1. In the illustrated embodiment of
Further, when the contact terminal 124 (see
Referring now to
Further, in the illustrated embodiment of
Referring now to
Referring now to
As can be seen from a comparison of
It is to be understood that individual features shown or described for one embodiment may be combined with individual features shown or described for another embodiment. The above described implementation does not in any way limit the scope of the present disclosure. Therefore, it is to be understood although some features are shown or described to illustrate the use of the present disclosure in the context of functional segments, such features may be omitted from the scope of the present disclosure without departing from the spirit of the present disclosure as defined in the appended claims.
The present disclosure relates to the cable connecting assembly 120, 220 including the contact terminal 124, 924, 1024 and the connecting device 136. The surfaces of the contact terminal 124, 924, 1024 and the cable 122 of the cable connecting assembly 120, 220 that touch one another are generally circular, and so the cable 122 may be easily rotated relative to the connecting device 136 in order to dispose the cable 122 at a desired orientation without requiring specialized tools and set-ups. The contact terminal 124, 924, 1024 connects with the cable 122 (for example a high-voltage conductor cable) and may act as an orientation-free interface. The contact terminal 124, 924, 1024 may enable an operator to adjust the cable 122 in real-time. In examples wherein the bracket 856 includes the second slot 857, the second body portion 132 of the contact terminal 124, 924 can be received within each of the first slot 150 and the second slot 857 to ensure that the contact terminal 124, 924 is retained in position by the connecting device 136, and may prevent unintentional movement of the contact terminal 124, 924.
Further, the bracket 156, 856 may be disposed in different orientations. For example, the bracket 156, 856 may be disposed in a first orientation for connection of the contact terminal 124, 924. Moreover, the bracket 156, 856 may be disposed in a second orientation for connection of the contact terminal 1024.
Optionally, for the contact terminal 124, 924 the second body portion 132 can be received within the first slot 150 of the connecting device 136 to ensure that the contact terminal 124 is retained in position by the connecting device 136, and may prevent unintentional lengthwise (or axial) movement of the contact terminal 124, 924.
Moreover, in examples wherein the cable connecting assembly 200 includes the contact terminal 1024, the bracket 156 of the connecting device 136 may abut with the contact terminal 1024 at the cut-outs 1076, 1078 to prevent any unintentional lengthwise (or axial) movement of the contact terminal 1024.
Further, the cable connecting assembly 120, 220 may eliminate a requirement of specialized and heavy tools/set-ups for connecting the cable 122 with the inverter 121 that may otherwise damage the cable 122, the contact terminal 124, 924, 1024 or the connecting device 136 of the cable connecting assembly 120, 220. The cable connecting assembly 120, 220 may also simplify an assembly process of connecting the cable 122 with the inverter 121 while reducing assembly time and overall costs associated with the cable connecting assembly 120, 220. Further, the cable connecting assembly 120, 220 may be used across various machines. Moreover, the cable connecting assembly 120, 220 described herein may reduce human effort as the cable 122 of the cable connecting assembly 120, 220 may not have to be twisted and therefore, may reduce operator fatigue.
Overall, the cable connecting assembly 120, 220, when compared to conventional cable connecting assemblies, may be cost-effective, may eliminate the requirement of alignment between two or more components of the cable connecting assembly 120, 220, and may be retrofitted on existing machines.
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 work machine, 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.