This disclosure relates to movable electric machinery having a trailing cable connected to a source of power, and, more particularly, to a cable guide for guiding the cable onto a cable reel.
Existing cable guides used today are made from conductive materials (steel) and require a series of non-conductive components to isolate the cable guide from potential frame voltages.
One example of an existing electric vehicle cable guide can be found in U.S. Hughes Pat. No. 5,385,314. This disclosure is an improvement to the cable guide found in U.S. Hughes Pat. No. 5,385,314.
It is an object of this disclosure to provide a new two-roller design offering rollers made of non-conductive material requiring no additional means to isolate the rollers from a machine frame.
Another object of this disclosure is to provide an electric vehicle with a cable guide, with the cable guide having rollers that do not require roller bearings.
This disclosure provides an electric vehicle powered by a trailing cable, the vehicle including a cable guide for guiding cable onto a reel as the cable is paid out and taken up. The cable guide comprises a pair of adjacent, double flanged concave rollers in alignment with each other so that their respective flanges are spaced apart by only a small distance substantially less than the cable diameter so that an essentially closed circular path is defined by the concave surfaces of the adjacent rollers so that the cable can not escape the rollers, each of the rollers including a polyurethane core that is hard and slick that creates a natural bearing surface, and an outer portion made of softer polyurethane than the core that aids in gripping and guiding the cable onto the cable reel.
Before one embodiment of the disclosure is explained in detail, it is to be understood that the disclosure is not limited in its application to the details of the construction and the arrangements of components set forth in the following description or illustrated in the drawings. The disclosure is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Use of “including” and “comprising” and variations thereof as used herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Use of “consisting of” and variations thereof as used herein is meant to encompass only the items listed thereafter and equivalents thereof. Further, it is to be understood that such terms as “forward”, “rearward”, “left”, “right”, “upward” and “downward”, etc., are words of convenience and are not to be construed as limiting terms.
As illustrated in the drawings, this invention comprises an electric vehicle 10. More particularly, a shuttle car useful in hauling material in underground mines is shown in
As the shuttle car 10 moves backwards, forwards, and around corners, toward to or away from the power source, the cable 22 is either wound onto or paid out of a reel 26. The cable 22 extends from the rear 34 of the shuttle car 10, and, at times, either runs along the side 38 of the shuttle car 10, when the shuttle car 10 is moving backwards, or extends straight back from the shuttle car 10, when the shuttle car 10 is moving forward (not shown). When the shuttle car moves right around a corner, as shown in
The shuttle car 10 further includes a cable guide 42 between the reel 26 and the rear 34 of the shuttle car 10, and a sheave bracket assembly 46 mounted on the left rear 30 of the shuttle car 10.
As illustrated in
Each of the rollers 50 has no roller bearing, and includes, as shown in
As illustrated in
The support plate 72 is figure eight shaped, with the round portions 88 of the figure eight being positioned above the rollers 50. The diameter of the round portions 88 is smaller than the diameter of the top flanges 54 of the rollers 50.