JP2009114859A - Prime mover portion structure of working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow an engine hood to be opened without removal of an air cleaner of a suction pipe and an engine and to realize cost reduction. <P>SOLUTION: A prime mover portion structure of a working machine includes a rockably openable/closable engine hood 21 and an air cleaner 23 for an engine supported by the engine hood 21. A connection part 35 is provided to a suction pipe 27 for connecting the air cleaner 23 for an engine to an engine 3, and connects an air cleaner side portion 27a and an engine side portion 27b so as to be relatively rotatable around a central axis identical with an opening/closing central axis P of the engine hood 21 so that the air cleaner side portion 27a of the suction pipe 27 relatively rotates with the engine hood 21 with respect to the engine side portion 27b of the suction pipe 27. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a prime mover structure of a working machine including an engine bonnet that can swing and open and an engine air cleaner supported by the engine bonnet.

Conventionally, as a working machine provided with an engine bonnet that can swing freely, there has been one described in Patent Document 1, for example.
Patent document 1 describes a combine. In this combine, the engine bonnet is supported so as to be swingable around the operating unit opening axis, and is in a closed state positioned above the body frame of the self-propelled aircraft and an open state positioned outside the self-propelled aircraft. Switch.

JP 2007-37460 A

In an engine bonnet that can be swingably opened and closed, an engine air cleaner (hereinafter abbreviated as “air cleaner”) may be disposed outside the engine bonnet to support the air cleaner on the engine bonnet.
In this case, if the engine bonnet can be opened by removing the intake pipe that connects the air cleaner and the engine on the air cleaner side or the engine side, the troublesome work of removing and installing the intake pipe is necessary for inspection and repair work of the prime mover. I need it.
On the other hand, if an intake pipe equipped with an expansion / contraction mechanism such as a bellows is used so that the engine bonnet can be opened with the intake pipe connected to the engine and the air cleaner, the structure of the intake pipe support is complicated. Become.
That is, since the intake pipe is provided with an expansion / contraction mechanism, it has the property of being easily bent and shaken. For this reason, it is necessary to support the intake pipe accurately and at many places so as to prevent the intake pipe from coming into contact with a device portion such as an engine in the prime mover due to bending or shaking caused by vibration. .

  An object of the present invention is to provide a prime mover structure of a working machine that can be easily obtained in terms of the structure of the intake pipe while the engine bonnet can be opened without requiring removal of the intake pipe.

The first aspect of the present invention is a prime mover structure of a working machine comprising an engine bonnet that can swing and open and an engine air cleaner supported by the engine bonnet.
The air cleaner side portion and the engine side portion of the engine bonnet are connected so that the air cleaner side portion of the intake pipe communicating the engine air cleaner with the engine rotates together with the engine bonnet with respect to the engine side portion of the intake pipe. A connection portion is provided in the intake pipe so as to be relatively rotatable around the same axis as the opening / closing axis.

  According to the first aspect of the present invention, when the engine bonnet is opened and closed, the air cleaner side portion of the intake pipe rotates together with the engine bonnet relative to the engine side portion around the same axis as the opening and closing axis of the engine bonnet. Even if the air cleaner side part and the engine side part of the intake pipe are configured with relatively hard pipes so that they do not easily bend or swing, and the intake pipe remains connected to the engine air cleaner and the engine, the engine bonnet Can be released.

  This eliminates or simplifies the support means that allows a convenient work machine that can efficiently perform inspections and repairs to the air cleaner side part and engine side part of the intake pipe without taking in and out the intake pipe. The structure shown can be obtained in a simple state.

  The second aspect of the invention includes an air cleaner side cylindrical body that is externally fitted to a support column that supports the engine bonnet so as to be swingable and openable, and that is communicated with the air cleaner side portion, and is externally fitted to the support column and is attached to the engine side portion. The connecting portion is configured to include a communicating engine-side cylinder, and a connecting means for connecting the air cleaner-side cylinder and the engine-side cylinder so as to be relatively rotatable in a communication state.

  According to the configuration of the second aspect of the invention, the air cleaner side portion is supported by the engine side portion while the connection portion is supported by a simple mounting structure in which the air cleaner side cylinder and the engine side cylinder are externally fitted to the column. On the other hand, it is possible to accurately match the shaft core that rotates relative to the opening / closing shaft core of the engine bonnet.

  Thereby, the air cleaner side portion can smoothly rotate with respect to the engine side portion and the engine bonnet can be lightly opened and closed, but can be obtained at a low cost from the viewpoint of the attachment structure of the connection portion.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a working machine according to an embodiment of the present invention. FIG. 2 is a plan view of the working machine according to the embodiment of the present invention. As shown in these drawings, the working machine according to the embodiment of the present invention is configured to be self-propelled by the crawler type traveling device 1 and has a driving part having a driving seat 2 and a lower part of the driving seat 2. A traveling machine body equipped with a prime mover 4 having an engine 3 provided, a cutting part 6 connected to the front part of the machine body frame 5 of the traveling machine body, and a side of the traveling machine body on the rear side of the machine body frame 5 A threshing device 7 and a grain tank 8 provided side by side are provided.

This machine harvests rice, wheat and the like.
That is, the cutting unit 6 is configured such that the cutting unit frame 10 is moved up and down with respect to the body frame 5 by a hydraulic cylinder (not shown) so that the weeding tool 12 positioned at the front end of the cutting unit 6 is The ascending / descending work state descending to the vicinity of the ground and the ascending non-working state in which the weeding tool 12 is elevated from the ground are raised and lowered.
When the cutting unit 6 is in the descending work state and the traveling machine body is driven, the cutting unit 6 raises the planted cereal by the weeding tool 12 and introduces it into the device 13 to cause the processing to occur, and the planting that is induced and processed The vertical cereals are cut by the clipper-shaped reaping device 14, and the chopped cereals are transported backward by the feeding / conveying device 15 and supplied to the threshing device 7. The threshing device 7 sandwiches and conveys the stock side of the harvested cereal rice cake backward by a threshing feed chain (not shown), and supplies the tip side of the conveyed cereal rice cake to the handling room (not shown). To do. The grain tank 8 collects and stores the threshing grains from the threshing device 7.

  FIG. 4 is a rear view of the prime mover 4. FIG. 5 is a side view of the prime mover 4. As shown in these drawings, the prime mover 4 includes the engine 3, an engine cooling radiator 20 that is disposed on the lateral outer side of the traveling machine body than the engine 3 and is supported by the machine body frame 5, and the engine cooling unit. An engine bonnet 21 that covers the radiator 20 and the engine 3, a dust-proof case 22 provided behind the driver seat 2 on the upper surface side of the top plate 21 a of the engine bonnet 21, and an engine provided inside the dust-proof case 22 Air cleaner 23 (hereinafter abbreviated as “air cleaner 23”).

  The engine bonnet 21 includes the top plate 21a, a front plate 21b positioned on the front side of the traveling body of the engine 3, and a lateral side wall 21c positioned on the lateral outer side of the traveling body of the engine cooling radiator 20. It is. The engine bonnet 21 supports the driver seat 2 by the top plate 21a. The side wall 21c is provided with an intake port 25 for engine cooling air. A lateral side wall 22 a on the lateral outer side of the traveling body of the dustproof case 22 is integrally formed with the lateral side wall 21 c of the engine bonnet 21.

  The engine bonnet 21 is supported by a support column 30 that is disposed near a corner located on the inner side in the lateral direction of the traveling machine body on the rear side of the engine hood 21 and is erected on the machine body frame 5.

  As shown in FIGS. 4, 5, and 6, the support column 30 includes a fuselage-side support column 30 a fixed to the vehicle body frame 5, and a bonnet-side support column whose lower end portion is rotatably supported by the upper end portion of the fuselage-side support column 30 a. 30b. The bonnet-side support column 30b and the engine bonnet 21 are connected via a connecting member 31, and the engine bonnet 21 can be swingably opened and closed around the opening / closing axis P of the traveling machine body provided in the support column 30. It is supported.

FIG. 3 shows an open state of the engine bonnet 21. As shown in this figure, when the engine bonnet 21 is swung around the opening / closing axis P toward the lateral side of the traveling machine body, it opens. Then, the engine bonnet 21 is in a state of being sideways with respect to the traveling vehicle body, that is, the lateral side wall 21c of the engine bonnet 21 is along the lateral direction of the traveling vehicle body, and the front end side of the engine bonnet 21 is directed from the vehicle body frame 3 toward the lateral outer side of the traveling vehicle body. The engine 3 and the engine cooling radiator 20 are opened so that they can be inspected and repaired. At this time, the floor plate 40, the front wall 41, the side wall 42, and the side operation panel 43 of the driving unit move on the engine bonnet 21 to be in an open state positioned on the lateral outer side of the traveling machine body.
At this time, the grain tank 8 is rocked and released around the axis X.

  FIG. 2 shows a closed state of the engine bonnet 21. As shown in this figure, when the engine bonnet 21 is swung around the opening / closing axis P toward the inside of the traveling machine body, the engine bonnet 21 is closed. Then, the engine bonnet 21 is in a state along the longitudinal direction of the traveling machine body and covers the engine 3 and the engine cooling radiator 20.

  As shown in FIG. 8, when the engine bonnet 21 is opened and closed, the engine bonnet 21 swings while being received and supported by a support mechanism 45 provided across the engine bonnet 21 and the body frame 5.

  That is, as shown in FIG. 8, the support mechanism 45 includes a support arm 46 slidably connected to the machine body frame 5 around an axis 46a that is vertically movable on the traveling machine body, and is slidably held by the support arm 46. The bonnet receiving body 47 is provided. The bonnet receiving body 47 is connected to the lower end side of the engine bonnet 21 so as to be rotatable about a shaft center in the vertical direction of the traveling machine body.

  A support mechanism 45 indicated by a solid line in FIG. 8 indicates a support mechanism in a state where the engine bonnet 21 is closed. A support mechanism 45 indicated by a two-dot chain line in FIG. 8 indicates a support mechanism when the engine bonnet 21 is opened. As shown in this figure, the support mechanism 45 operates the engine bonnet 21 by swinging the support arm 46 while the bonnet receiving body 47 slides with respect to the support arm 46 as the engine bonnet 21 swings. Regardless of the rocking motion, the support arm 46 and the bonnet receiver 47 are kept connected, and the support arm 46 receives and supports the free end side of the engine bonnet 21 so as not to hang down.

As shown in FIG. 4, the air cleaner 23 is attached to a stay 24 provided on the upper surface side of the top plate 21 a of the engine bonnet 21, and is supported by the engine bonnet 21 via the stay 24. A suction pipe 26 extending from the suction port 23 a of the air cleaner 23 is opened inside the dustproof case 22. An exhaust port 23 b of the air cleaner 23 is communicated with an intake portion of the engine 3 by an intake pipe 27 inserted through the top plate 21 a of the engine bonnet 21.
That is, the engine 3 removes dust by sucking air that has flowed into the dustproof case 22 from the outside into the air cleaner 23 through the suction port 26 through the air inlet 22d located in the lateral side wall 22a of the dustproof case 22 and removing the dust. The latter air is taken in as combustion air through the intake pipe 27.

  As shown in FIGS. 4 and 5, the intake pipe 27 connects an air cleaner side portion 27 a connected to the air cleaner 23 and an engine side portion 27 b connected to the engine 3 at a portion where the support column 30 is located. The connecting portion 35 is provided.

  The air cleaner side portion 27a and the engine side portion 27b can be easily bent or swayed without support other than the support by the connection portion 35 and the air cleaner 23, or without support other than the support by the connection portion 35 and the engine 3. It is constituted by a hard rubber tube so as to have strength that does not occur.

  FIG. 6 is a longitudinal sectional view of the connecting portion 35. As shown in the figure, the connecting portion 35 includes an air cleaner side cylinder 36 that is externally fitted to the bonnet side support 30b of the support 30, and the bonnet above the traveling machine body from the air cleaner side cylinder 36. An engine-side cylinder 37 externally fitted to the side column 30b, and a connecting means 38 for connecting the lower end side of the engine-side cylinder 37 and the upper end side of the air cleaner-side cylinder 36. It is.

  The air cleaner side cylindrical body 36 communicates with the air cleaner side portion 27a through a connection port 36a provided in a peripheral wall portion thereof. The air cleaner side cylindrical body 36 is connected to the bonnet column 30b at the lower wall portion 36b so as to be integrally rotatable.

  The engine-side cylinder 37 communicates with the engine-side portion 27b through a connection port 37a provided on the peripheral wall portion thereof. The engine-side cylinder 37 is fitted on the bonnet-side column 30b so as to be relatively rotatable.

  The connecting means 38 is configured to communicate the vent 36d located in the upper side wall 36c of the air cleaner side cylinder 36 with the vent 37c located in the lower side wall 37b of the engine side cylinder 37. It consists of a cylindrical body mounted so as to be relatively rotatable over the side wall portion 36c and the lower side wall portion 37b, and the air cleaner side cylindrical body 36 and the engine side cylindrical body 37 are connected in a relatively rotatable manner.

  A connection portion 35 indicated by a solid line in FIG. 7 indicates a connection portion when the engine bonnet 21 is closed. A connecting portion 35 indicated by a two-dot chain line in FIG. 7 indicates a connecting portion when the engine bonnet 21 is opened. As shown in this figure, the connecting portion 35 is formed of an air cleaner side portion 27a so that the air cleaner side portion 27a rotates relative to the engine side portion 27b around the same axis as the opening / closing axis P together with the engine bonnet 21. The engine bonnet 21 can be opened and closed even when the engine 27a and the engine side portion 27b are connected and the intake pipe 27 remains connected to the air cleaner 23 and the engine 3.

  As the connecting portion 35 of the intake pipe 27, instead of the above-described embodiment, the airframe side strut 30a and the bonnet side strut 30b of the strut 30 are configured as hollow struts, and the airframe side strut 30a is configured as an engine of the intake pipe 27. A configuration may be adopted in which the bonnet side column 30b is communicated with the side portion 27b, the bonnet side column 30b is communicated with the air cleaner side portion 27a of the intake pipe 27, and the column is used as a cylinder. Also in this case, the object of the present invention can be achieved.

Side view of work equipment Top view of work equipment Top view of the work equipment with the engine hood open Rear view of prime mover Side view of the driving and driving parts Vertical section of connection The top view which shows the operation state of a connection part Plan view of support mechanism

Explanation of symbols

3 Engine 21 Engine Bonnet 23 Air Cleaner 27 Intake Pipe 27a Air Cleaner Side Portion 27b Engine Side Portion 30 Strut 35 Connection Portion 36 Air Cleaner Side Tube 37 Engine Side Tube 38 Connecting Means P Opening / Closing Axle

Claims (2)

A prime mover structure of a working machine comprising an engine bonnet that can swing and open and an engine air cleaner supported by the engine bonnet,
The air cleaner side portion and the engine side portion of the engine bonnet are connected so that the air cleaner side portion of the intake pipe communicating the engine air cleaner with the engine rotates together with the engine bonnet with respect to the engine side portion of the intake pipe. A prime mover structure of a work machine in which a connection portion that is connected to the same axis as the opening / closing axis so as to be relatively rotatable is provided in the intake pipe.   An air cleaner side cylinder that is externally fitted to a support column that supports the engine bonnet so as to be swingable and openable, and that communicates with the air cleaner side part, and an engine side that is externally fitted to the post and communicates with the engine side part. The prime mover for a working machine according to claim 1, further comprising: a cylinder, and a coupling means for coupling the air cleaner side cylinder and the engine side cylinder in a communication state so as to be relatively rotatable. Part structure.

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