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Access ladder assembly for a movable machine

A technology for components and ladders, applied in the field of retractable ladder systems, can solve problems such as object damage

Active Publication Date: 2019-05-21
CATERPILLAR PAVING PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the distance between the lower rung or another part of the ladder and the ground is too small, objects on the ladder or the ground may be damaged when the machine is lowered without raising the ladder or its lower part to initiate material removal operations. damage

Method used

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  • Access ladder assembly for a movable machine
  • Access ladder assembly for a movable machine
  • Access ladder assembly for a movable machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] A machine 10 (eg, a cold milling machine) is shown at figure 1 , and includes frame 12 ( figure 2 ) and prime mover 13 (eg, engine). A plurality of ground-engaging drive mechanisms (eg, tracks 14 ) are capable of engaging ground 140 beneath machine 10 and may be driven by prime mover 13 to propel machine 10 along the ground. Machine 10 may include a plurality of elevation control mechanisms 15 , such as hydraulic cylinders, for adjusting the height of the machine relative to ground 140 . While machine 10 is shown in a "track-type" configuration, other configurations may be used, such as a wheeled configuration.

[0020] Machine 10 may include a milling system (generally indicated by reference numeral 16 ) capable of cutting or grinding the top layer of ground 140 . The milling system 16 may include a milling drum or roll (not shown) and a conveyor system 17 . The milling drum can be rotatably supported on the frame 12 and can be powered to rotate relative thereto d...

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PUM

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Abstract

An access ladder assembly for a machine includes a fixed section, a movable section, a biasing member, a locking member, and a release assembly. The fixed section includes a pair of guide members anda fixed step. The movable section is mounted on and is movable along the fixed section between extended and retracted positions. The movable section includes a pair of sidewalls, and at least one horizontal step and is biased towards the retracted position by the biasing member. The locking member locks the movable member at the extended position. The release assembly operates to release the locking member. A manually engagable actuator of the release assembly may be disposed adjacent the fixed step. The movable section may include rails that slide within a hollow portions of the guide membersas the movable section moves between the extended and retracted positions.

Description

technical field [0001] The present invention relates generally to ladder assemblies, and more particularly to a retractable ladder system for assisting entry and exit from a mobile machine. Background technique [0002] Machines such as cold planers or rotary mixers may be used to remove overlying material from ground (eg, pavement). Such machines may be configured with rotating milling drums that engage the ground during material removal or milling operations. To adjust the cutting or milling depth, the machine may include hydraulic cylinders that adjust the elevation or height of the machine (including the milling drum) relative to the ground. [0003] The machine also typically includes an operator station and a ladder to aid in entering and exiting the operator station. In some cases, the minimum distance from the ground to the first or lower rung of the ladder may be set or specified by government regulations. In other cases, the minimum distance from the ground to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E06C5/16E06C5/32E06C7/00E06C7/06E06C7/50
CPCE06C5/36E06C7/02B60R3/04E06C5/22B60R3/02E06C7/183E06C7/081E02F9/0833
Inventor J·A·哈罗N·L·玛舍克E·S·恩格尔曼
Owner CATERPILLAR PAVING PROD INC