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Construction machine

A technology for construction machinery and filters, which is applied in construction, mechanical equipment, earth movers/shovels, etc., can solve the problems that it is impossible to realize the small diameter of the shell 21, and the miniaturization of the fuel tank is difficult to achieve, so as to increase the service life, The effect of simplifying the shape and connection structure and ensuring the capacity of the fuel tank

Active Publication Date: 2011-07-06
KOBELCO CONSTR MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, it is basically impossible to reduce the diameter of the case 21, which makes it difficult to reduce the size of the fuel tank.

Method used

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Embodiment approach

[0075] (1) The support structure of the filter holder 37 may be changed to other forms such as providing a support member having a sparse mesh between the holder 37 and the filter housing bottom wall 30a, for example.

[0076] Alternatively, it can also be used in Figure 8 , 9 On the basis of the return flow structure of the prior art shown above, return piping 32... is directly connected to the filter case 30 by dividing up and down. In this case, the direct impact of the return oil on the lower side of the filter 31 can be avoided by known baffles.

[0077] (2) Depending on the positional relationship between the hydraulic oil tank 28 and the control valve 13, a part or the entire height of the central portion in the front-rear direction of the valve-facing surface 29a of the oil tank main body 29 may be recessed in the valve height direction so as to be concave in plan view. shape.

[0078] (3) In the above-mentioned embodiment, the case where the pressure compensating ...

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Abstract

The invention provides a building machinery to make the back part oppositely arranged with the control valve of the oil tank body of working oil tank arranged in parallel to the control valve concave to the inclined shape to the direction away from the control valve, thereby forming working space for disassembling the pressure complementary slide valve of the control valve and connecting dispersedly to the side wall of the filter casing in the oil tank body of the returned tubing. Besides, the oil tank body is provided with an under tube-shaped filter casing of a return filter for holding filter return oil to connect the return tubing at the casing side wall in the state of communicating the filter casing. In the composition, a filter receiving plate is provided in a lower part within thefilter case with leaving a gap (A) between the plate and the filter case bottom wall in a state that the plate is supported by a return pipe, the return filter is disposed on the plate, and the return tubes are connected to the filter case side wall on the lower side than the plate.

Description

technical field [0001] The present invention relates to construction machines such as a hydraulic excavator having a working oil tank. Background technique [0002] The background art will be described by taking a hydraulic excavator as an example of a preferred example of the present invention. [0003] hydraulic excavator such as Figure 5 As shown, a revolving upper body 2 is rotatably mounted on a crawler-type lower traveling body 1 , and a working attachment 3 is attached to the revolving upper body 2 . [0004] The work attachment 3 includes a boom 4 that can be pitched freely, an arm 5 mounted on the front end of the boom 4 , a bucket 6 mounted on the front end of the arm 5 , and a boom as a hydraulic actuator for driving them. , stick, bucket each pressure cylinder 7,8,9. [0005] Figure 6 Indicates the local equipment configuration in the upper rotating body 2, Figure 7 Furthermore, a partial enlarged view thereof is shown. [0006] An engine 10 as a power so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B1/26B01D35/02E02F9/20
Inventor 宫地功
Owner KOBELCO CONSTR MASCH CO LTD