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Two bolt adjustable centering system

A centering and threaded hole technology, which is used in liquid variable volume machinery, piston pumps, machines/engines, etc., can solve the problems of small adjustment of the pump centering mechanism and difficulty in realizing it.

Active Publication Date: 2009-08-19
CLARK EQUIP CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adjustments to the pump centering mechanism are relatively minor and difficult to achieve

Method used

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  • Two bolt adjustable centering system
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  • Two bolt adjustable centering system

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Embodiment Construction

[0039] The power machine 10 is shown as a whole in figure 1 and figure 2 In the present invention it is useful to incorporate this type of power machine. As shown, the power machine 10 includes a main frame assembly 16 , a lift arm assembly 30 and an operator compartment 40 . A pair of wheels 12 mounted to the steering shaft 14 extend from both sides of the main frame 16 .

[0040] The lift arm assembly 30 is mounted to the upright member 20 of the main frame assembly 16 . As shown, the lift arms 30 include a pair of lift arms 32 on the wheels 12 . The lift arms 32 are interconnected by a cross member 33 and are pivotally mounted to the upright member 20 at the rearward end. Lift assembly 30 is configured to be pivotally connected to a connection such as bucket 34 . The lift assembly 30 is raised and lowered relative to the main frame assembly 16 by actuating a pair of lift cylinders 36 . Each of the lift cylinders 36 has a first end pivotally mounted to one of the uprigh...

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PUM

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Abstract

A centering mechanism for a hydraulic pump, a hydraulic pump assembly and a method of assembling a hydraulic pump assembly. The pump assembly generally includes a hydraulic pump, a control arm, and a centering mechanism. The pump generally includes a pump housing, a pump mechanism operable to control a flow of hydraulic fluid through the housing, the pump mechanism having a neutral condition in which fluid does not flow through the housing, a trunnion cap connectable to the housing, the trunnion cap and the housing cooperating to house the pump mechanism, and an input shaft extending along an axis and through the trunnion cap, the shaft being rotatable to operate the pump mechanism. The control arm is connected to the shaft, and movement of the control apn causes rotation of the shaft. The centering mechanism may generally include a first bracket fixable to the housing, a second bracket adjustably fixable to the first bracket, and biasing structure operable to return the control apn to a centered position when an operating force is not applied to the control arm. The second bracket is adjustable relative to the first bracket to an adjusted position such that the centered position corresponds to the neutral condition of the pump mechanism, the second bracket being fixable in the adjusted position. Fasteners fix the first bracket and the trunnion cap to the pump housing.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to co-pending US Provisional Patent Application No. 60 / 824,300, filed September 1, 2006, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to power machines. More particularly, the present invention relates to power machines having hydraulic drive systems. Background technique [0004] Power machines may utilize a hydraulic system (sometimes called a hydrostatic system) to provide power to drive the power machine. For example, conventional skid steer loaders have a hydraulic pump that provides hydraulic oil to a hydraulic drive motor, thereby actuating the hydraulic drive motor. The hydraulic drive motor has an output that is communicated to one or more axles to drive the wheels that move the power machine. A type of power machine, skid steer loaders have a pair of hydraulic pumps, one on each side of the power ma...

Claims

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Application Information

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IPC IPC(8): F04B9/02F16H61/40
CPCF04B1/328F04B1/324F04B49/02Y10T29/49229
Inventor 布兰顿·J·基塞马克·R·默夫
Owner CLARK EQUIP CO INC
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