CA1137138A - Mounting step assembly for track laying tractor - Google Patents
Mounting step assembly for track laying tractorInfo
- Publication number
- CA1137138A CA1137138A CA000346806A CA346806A CA1137138A CA 1137138 A CA1137138 A CA 1137138A CA 000346806 A CA000346806 A CA 000346806A CA 346806 A CA346806 A CA 346806A CA 1137138 A CA1137138 A CA 1137138A
- Authority
- CA
- Canada
- Prior art keywords
- track
- frame
- track frame
- end walls
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Body Structure For Vehicles (AREA)
Abstract
MOUNTING STEP ASSEMBLY FOR TRACK LAYING TRACTOR
Abstract of the Disclosure A track laying tractor includes a mounting step located on the track frame within a walled enclosure arranged to prevent debris from dropping from the upper run of the track onto the frame in the area of the step.
Abstract of the Disclosure A track laying tractor includes a mounting step located on the track frame within a walled enclosure arranged to prevent debris from dropping from the upper run of the track onto the frame in the area of the step.
Description
li;~7138 The present invention relates to mounting step assemblies for vehicles and more particularly relates to mounting step assemblies located on track frame of track laying tractors.
It is known to provide track laying tractors with step assemblies for aiding an operator in climbing to and from operator stations of the tractors, the step assemblies being secured to the track frames of the tractors. These step assemblies are normally located beneath the upper runs of the endless tracks of the tractors. Therefore, whenever the tractors are operating in conditions where adhesive materials such as mud and/or snow and the like, it has been found that these materials are carried above and deposited on the step area by the upper runs of the tracks such as to make the steps entirely unuseable or dangerous to use because of the slipperiness of the materials coating the steps.
Summary of the Inve_tion According to the present invention, there is provided an improved mounting step assembly for use on track frames of track laying tractors.
An object of the invention is to provide a step assembly located on a track laying tractor track frame beneath the upper run of an endless track encircling the frame and designed such as to prevent materials carried by the upper run of the track from falling onto and covering the step of the assembly.
A more specific object of the invention is to provide a mounting step assembly for a track laying tractor including a step fixed to the track frame and an outwardly opening shield structure fixed to the track frame and disposed above and at opposite ends of the step.
These and other objects will become apparent from a reading of the ensuing description together with the appended drawings.
1 Brief Description of the Drawings Fig. 1 is a right side elevational view showing a crawler tractor provided with a mounting step assembly constructed in accordance with the principles of the present invention.
Fig. 2 is a right rear perspective view of a prior art mounting step assembly.
Fig. 3 is a right rear perspective view of the mounting of the present invention.
Description of the Preferred Embodiment Referring now to Fig 1 of the drawing, therein is shown a track laying tractor 10 including a main frame 12 supported by a pair of track frame assemblies 14 (only one visible) located at the opposite side thereof. Located forwardly on the frame 12 is an engine compartment 16. An operator's station 18 is located on the frame 12 behind the compartment 16.
The track assemblies 14 each includes a fore-and-aft elon-gated track frame 20 having an idler wheel 22 mounted at the forward end of the frame 20 for fore-and-aft movement and a drive sprocket 24 supported by the frame 12 and disposed at the rear end of the frame 20 in fore-and-aft alignment with the idler wheel 22. An endless track 26 is disposed about the idler wheel 22 and drive sprocket 24 and includes upper and lower runs 28 and 30, respectively, disposed vertically above and below the frame 20. The frame 20 includes a housing 32 forming an upper portion thereof and within which is located an idler wheel recoil mecha-nism (not shown) connected between the frame 20 and the idler wheel 22 and acting to resiliently bias the wheel 22 forwardly to maintain proper tension in the track 26.
Fixed to the housing 32 in transverse alignment with an operator access passage of the operator's station 18 is a mounting step assembly 34. Specifically, the step assembly 34 includes a U-shaped strap 35 having a fore-and-aft extending foot-engageable 11;~7138 1 portion 36 joined at its opposite ends to front and rear parallel, transversely extending legs. This much of the step assembly 34 is known in the prior art as illustrated in Fig. 2. Disposed in partial covering relationship to the U-shaped strap is a shield 37 comprising triangular end plates 38 and 40 respectively engaged with outer vertical surfaces of the ends of the U-shaped strap 35. The end plates 38 and 40 respectively include our edges 42 and 44, located coplanar with an outer surface of the foot-engageable portion 36 of the strap 35 and downwardly and inwardly inclined upper ends joined by a downwardly and inwardly inclined plate 46 having an outer edge 48 located vertically above the strap portion 36, the plates 38, 40 and 46 thus defining an outwardly opening cavity 50 into which an operator's foot may be inserted while engaging the strap portion 36 as the operator mounts or dismounts from the vehicle. Further, it is noted that the disposition of the plate 46 relative to the strap 36 results in the area occupied by and inwardly of the strap 36 being kept free of material which may be carried above and dropped upon the step assembly 34 by the ~pper run 28 of the track 26.
The operation of the step assembly 34 is thought to be understood from the foregoing description and for the sake of brevity no further description of the operation is given.
It is known to provide track laying tractors with step assemblies for aiding an operator in climbing to and from operator stations of the tractors, the step assemblies being secured to the track frames of the tractors. These step assemblies are normally located beneath the upper runs of the endless tracks of the tractors. Therefore, whenever the tractors are operating in conditions where adhesive materials such as mud and/or snow and the like, it has been found that these materials are carried above and deposited on the step area by the upper runs of the tracks such as to make the steps entirely unuseable or dangerous to use because of the slipperiness of the materials coating the steps.
Summary of the Inve_tion According to the present invention, there is provided an improved mounting step assembly for use on track frames of track laying tractors.
An object of the invention is to provide a step assembly located on a track laying tractor track frame beneath the upper run of an endless track encircling the frame and designed such as to prevent materials carried by the upper run of the track from falling onto and covering the step of the assembly.
A more specific object of the invention is to provide a mounting step assembly for a track laying tractor including a step fixed to the track frame and an outwardly opening shield structure fixed to the track frame and disposed above and at opposite ends of the step.
These and other objects will become apparent from a reading of the ensuing description together with the appended drawings.
1 Brief Description of the Drawings Fig. 1 is a right side elevational view showing a crawler tractor provided with a mounting step assembly constructed in accordance with the principles of the present invention.
Fig. 2 is a right rear perspective view of a prior art mounting step assembly.
Fig. 3 is a right rear perspective view of the mounting of the present invention.
Description of the Preferred Embodiment Referring now to Fig 1 of the drawing, therein is shown a track laying tractor 10 including a main frame 12 supported by a pair of track frame assemblies 14 (only one visible) located at the opposite side thereof. Located forwardly on the frame 12 is an engine compartment 16. An operator's station 18 is located on the frame 12 behind the compartment 16.
The track assemblies 14 each includes a fore-and-aft elon-gated track frame 20 having an idler wheel 22 mounted at the forward end of the frame 20 for fore-and-aft movement and a drive sprocket 24 supported by the frame 12 and disposed at the rear end of the frame 20 in fore-and-aft alignment with the idler wheel 22. An endless track 26 is disposed about the idler wheel 22 and drive sprocket 24 and includes upper and lower runs 28 and 30, respectively, disposed vertically above and below the frame 20. The frame 20 includes a housing 32 forming an upper portion thereof and within which is located an idler wheel recoil mecha-nism (not shown) connected between the frame 20 and the idler wheel 22 and acting to resiliently bias the wheel 22 forwardly to maintain proper tension in the track 26.
Fixed to the housing 32 in transverse alignment with an operator access passage of the operator's station 18 is a mounting step assembly 34. Specifically, the step assembly 34 includes a U-shaped strap 35 having a fore-and-aft extending foot-engageable 11;~7138 1 portion 36 joined at its opposite ends to front and rear parallel, transversely extending legs. This much of the step assembly 34 is known in the prior art as illustrated in Fig. 2. Disposed in partial covering relationship to the U-shaped strap is a shield 37 comprising triangular end plates 38 and 40 respectively engaged with outer vertical surfaces of the ends of the U-shaped strap 35. The end plates 38 and 40 respectively include our edges 42 and 44, located coplanar with an outer surface of the foot-engageable portion 36 of the strap 35 and downwardly and inwardly inclined upper ends joined by a downwardly and inwardly inclined plate 46 having an outer edge 48 located vertically above the strap portion 36, the plates 38, 40 and 46 thus defining an outwardly opening cavity 50 into which an operator's foot may be inserted while engaging the strap portion 36 as the operator mounts or dismounts from the vehicle. Further, it is noted that the disposition of the plate 46 relative to the strap 36 results in the area occupied by and inwardly of the strap 36 being kept free of material which may be carried above and dropped upon the step assembly 34 by the ~pper run 28 of the track 26.
The operation of the step assembly 34 is thought to be understood from the foregoing description and for the sake of brevity no further description of the operation is given.
Claims (2)
1. In combination with a track laying tractor track assem-bly including a fore-and-aft elongated track frame, drive and idler elements rotatably mounted at opposite ends of the track frame, a flexible endless track received about the drive and idler elements and having upper and lower runs respectively located vertically above and below the track frame and a mounting step mounted on an upper surface of the track frame beneath the upper run of the track, a step enclosure, comprising: first and second upright end walls fixed to the track frame at respective fore-and-aft spaced locations bordering the step and extending outwardly at least as far as an outermost surface of the step;
and a further wall extending between and joined to the end walls and extending downwardly and inwardly to the frame from a location vertically above the outermost surface of the step.
and a further wall extending between and joined to the end walls and extending downwardly and inwardly to the frame from a location vertically above the outermost surface of the step.
2. In combination with a track laying tractor track assem-bly including a fore-and-aft elongated track frame, drive and idler elements rotatably mounted at opposite ends of the track frame, a flexible endless track received about the drive and idler elements and having upper and lower runs, respectively, located vertically above and below the track frame and a mounting step mounted on an upper surface of the track frame beneath an upper run of the track, a step enclosure, comprising: a pair of vertical triangular end walls mounted on the track frame at opposite ends of the step in crosswise extending relationship to the frame; said end walls having respective outer edges located outwardly at least as far as the step and having respective upper edges inclined downwardly and inwardly to the frame; and a down-wardly and inwardly inclined wall extending between the end walls and joined to the upper edges of the latter along the entire length thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2569679A | 1979-04-02 | 1979-04-02 | |
| US025,696 | 1979-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1137138A true CA1137138A (en) | 1982-12-07 |
Family
ID=21827569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000346806A Expired CA1137138A (en) | 1979-04-02 | 1980-03-03 | Mounting step assembly for track laying tractor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1137138A (en) |
-
1980
- 1980-03-03 CA CA000346806A patent/CA1137138A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |