JP2009079579A - Working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine capable of making a structure for supplying an engine combustion gas and an inspection operation simple and efficient and of preventing an engine from sucking dust. <P>SOLUTION: The working machine includes: an engine hood 21 capable of swingably being opened and closed; a connection part 29 disposed in an intake passage 28 for communicating an air cleaner 23 with an engine 3 and for switching between a connection state in which a portion nearer to the air cleaner 28b of the intake passage 28 is communicated with a portion nearer to the engine 28a thereof and a separation state in which the portion nearer to the air cleaner 28b is separated from the portion nearer to the engine 28a; a separation detecting means 40 for detecting a switch to the separation state of the connection part 29; an engine starting/retraining means 42 for switching between an on state in which the engine 3 is restrained from starting and an off state in which the engine 3 is allowed to start; and a control means for operating the engine starting/restraining means 42 based on detection information from the separation detecting means 40, such that the engine starting/restraining means 42 turns to the off state if the separation detecting means 40 does not detect the switch to the separation state of the connection part 29, and the engine starting/restraining means 42 turns to the on state if the separation detect means 40 detecting the same. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a work machine in which an engine bonnet is provided so as to freely swing and open.

Conventionally, for example, Patent Document 1 discloses a work machine described above.
Patent document 1 describes a combine. In this combine, the engine bonnet is supported so as to be swingable around the opening axis of the driving unit, 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 the case where the engine bonnet is provided so as to be swingable and openable, an engine air cleaner may be supported by the engine bonnet or provided outside the engine bonnet. In this case, the structure for supplying the engine combustion air can be simplified by providing a connection portion for separating or communicating the air cleaner side portion and the engine side portion of the intake passage for communicating the air cleaner with the engine. In addition, the inspection and repair work can be simplified and streamlined.
In other words, if the intake passage is provided with the flexibility that allows the engine bonnet to swing open and close while the intake passage is connected to the engine and the air cleaner, it is necessary to provide the intake passage with a length and bending / extending performance that allows the accommodation to occur. . If the intake passage connects the engine and the air cleaner at a short distance, when opening the engine bonnet, it is necessary to remove the intake passage from the engine and the air cleaner so as not to obstruct the opening of the engine bonnet.
On the other hand, even if the intake passage connects the engine and the air cleaner at a short distance, if the intake passage can be separated into the air cleaner side portion and the engine side portion, the air cleaner side portion is separated from the engine side portion. Then, the engine bonnet can be opened even if it moves along with the engine bonnet and the intake passage is kept connected to the air cleaner and the engine.

  When the engine bonnet is opened by separating the air intake path into the air cleaner side part and the engine side part in this way, the engine, when driven, sucks air without going through the air cleaner, making it easy to suck dust. .

  An object of the present invention is to provide a working machine capable of simplifying and improving efficiency of an air supply structure and inspection work of an engine and avoiding dust suction of the engine.

The first aspect of the present invention is a working machine in which an engine bonnet is provided so as to be swingable and openable.
Switchable connection between the intake passage that allows the air cleaner to communicate with the engine and a connection state in which the air cleaner side portion and the engine side portion of the intake passage communicate with each other and a separated state in which the air cleaner side portion and the engine side portion are separated Set up a section,
Separation detecting means for detecting the switching of the connecting portion to the separated state, and engine start restraining means capable of switching between an operating state for performing the engine start restraint and a release state for permitting the engine start. ,
The detection information by the separation detection means is set so that the engine start check means is in the release state in the non-detection state of the separation detection means, and the engine start check means is in the operation state in the detection state of the separation detection means. Control means for operating the engine start check means is provided.

  According to the configuration of the first invention, even when the air cleaner and the engine are connected by a short-distance intake passage, when opening the engine bonnet, the intake passage is separated into the air cleaner side portion and the engine side portion by the connection portion, The intake passage can be opened while being connected to the air cleaner and the engine.

  Further, according to the configuration of the first invention, when the engine bonnet is opened, the engine is inhaled without passing through the air cleaner due to separation of the air cleaner side portion and the engine side portion of the intake passage. However, the engine cannot be driven when the separation detection means is in the detection state and the control means operates the engine start check means to the operating state.

This makes it possible to simplify the air supply structure of the engine by adopting a short-distance intake passage, but simply opening the engine bonnet by separating the engine side portion and air cleaner side portion of the intake passage. Therefore, it is possible to obtain a working machine that can efficiently perform inspection and repair work.
In addition, it is possible to obtain a high-quality work machine that does not cause a situation in which the engine is driven with the engine hood open and the engine sucks dust.

  In the second aspect of the invention, the separation detecting means is a sensor body provided on one of the air cleaner side portion and the engine side portion of the intake passage, and a detection target provided on the other of the air cleaner side portion and the engine side portion. It is configured with a body.

  According to the configuration of the second aspect of the invention, it is possible to obtain the separation detection means with a simple structure by simply distributing the sensor main body and the detection target object to the air cleaner side portion and the engine side portion of the intake passage.

  Thereby, the dust suction of the engine can be avoided, but it can be obtained inexpensively from the surface of the separation detecting means.

  In the third aspect of the invention, one of the sensor main body and the detection target body is supported by a fastening device that fastens the air cleaner side portion and the engine side portion.

  According to the configuration of the third aspect of the invention, when the fastening device is attached so as to connect the air cleaner side portion and the engine side portion of the intake passage, the sensor main body or the detection target body is attached, and the separation detection means enters the attachment state. .

  Thereby, the separation detection means can be obtained with a simple structure, and the leakage of the separation detection means when the air cleaner side portion and the engine side portion of the intake passage are connected can be avoided.

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 provided with a prime mover 4 having an engine 3 provided, a cutting unit 6 connected to a front part of a 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 harvested cereal is cut by the clipper-shaped reaping device 14, and the chopped cereal is conveyed to the rear of the traveling machine by the supply conveying device 15 and supplied to the threshing feed chain (not shown) of the threshing device 7. The threshing device 7 sandwiches and conveys the stock side of the harvested culm with the threshing feed chain, and supplies the tip side of the transported culm to a handling room (not shown) for threshing treatment. The grain tank 8 collects and stores the threshing grains from the threshing device 7.

  FIG. 4 is a side view of the operating unit and the driving unit 4. FIG. 5 is a rear view of the prime mover 4. As shown in these drawings, the prime mover 4 includes the engine 3, an engine cooling radiator 20 positioned on the lateral outer side of the traveling machine from the engine 3, and an engine that covers the engine cooling radiator 20 and the engine 3. A hood 21, an air cleaner box 22 provided on the upper surface side of the top plate 21a of the engine bonnet 21 behind the driver seat 2, an engine air cleaner 23 provided in the air cleaner box 22, A pre-air cleaner 24 disposed above one end side of the air cleaner box 22 in the lateral direction of the traveling machine body.

  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 air cleaner box 22 is integrally formed with the lateral side wall 21 c of the engine bonnet 21.

  The air cleaner 23 is attached to a stay 26 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 through the stay 26. The pre-air cleaner 24 is supported by the air cleaner box 22 via an intake pipe 27 that penetrates the peripheral wall of the air cleaner box 22.

As shown in FIG. 5, the exhaust port 24 a of the pre-air cleaner 24 is communicated with the intake port 23 a of the air cleaner 23 through a pre-intake passage composed of the intake pipe 27. An exhaust port 23 b of the air cleaner 23 is communicated with an intake portion 3 a of the engine 3 by an intake passage 28 formed of an intake pipe that penetrates the top plate 21 a of the engine bonnet 21.
That is, the engine 3 takes in the air outside the engine bonnet as combustion air after being dust-removed by the pre-air cleaner 24 and the air cleaner 23.

  The engine bonnet 21 is pivotally supported by the machine body frame 3 so as to swing and open around the opening / closing axis P of the traveling machine body which is disposed near the corner of the machine body on the rear side of the traveling machine body. As shown in FIG. 5, the intake passage 28 includes a connection portion 29 provided in a portion located near the top plate 21 a inside the engine bonnet 21.

  FIG. 3 shows an opened 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 body, that is, the side wall 21c of the engine bonnet 21 is along the lateral direction of the traveling body, and the front end side of the engine bonnet 21 is directed from the body frame 3 toward the lateral outer side of the traveling body. The engine 3 and the engine cooling radiator 20 are opened so that they can be inspected and repaired.

  At this time, the intake passage 28 is separated by the connecting portion 29 into an engine side portion 28a connected to the engine 3 and an air cleaner side portion 28b connected to the air cleaner 23, and the intake passage 28 is separated from the engine bonnet. 21 so as not to become an obstacle to opening. The grain tank 8 is opened around the axis of the vertical axis of the self-propelled machine body arranged on the rear end side of the grain tank 8 so as not to obstruct the opening of the engine bonnet 21.

  When the engine bonnet 21 is opened, the floor plate 30, the front wall 31, and the lateral wall 32 of the driving unit move along the engine bonnet 21, a portion where a traveling mission (not shown) of the traveling machine body is located, and a cutting unit 6 side and side are opened.

  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. At this time, the floor plate 30, the front wall 31, and the lateral wall 32 of the driving unit move along the engine bonnet 21 and return to above the body frame 5.

  FIG. 6A is a side view of the connection portion 29 in the intake passage 28 in a connected state. FIG. 7 is a cross-sectional view of the connection portion 29 in a connected state. As shown in these drawings, the connecting portion 29 has a large-diameter portion 28c provided at an end portion of the engine-side portion 28a of the intake passage 28 and is externally fitted to an end portion of the air cleaner-side portion 28b. The large diameter portion 28c is fastened to the air cleaner side portion 28b by the fastening tool 33 attached to the outer surface side of 28c, thereby connecting the engine side portion 28a and the air cleaner side portion 28b. The fastening tool 33 fastens the large diameter portion 28c to the air cleaner side portion 28b by fastening.

  FIG. 6B is a side view of the connection portion 29 in a separated state. As shown in this figure, the connecting portion 29 has an air cleaner side portion 28b attached to the engine bonnet 21 by removing the large diameter portion 28c of the engine side portion 28a from the end of the air cleaner side portion 28b. The air cleaner side portion 28b and the engine side portion 28a are separated so as to move.

  As shown in FIG. 6A, separation detecting means 40 having a sensor main body 40a provided in the air cleaner side portion 28b is provided in the connecting portion 29. As shown in FIG. 8, the separation detecting means 40 is linked to the control means 41, and the engine starting check means 42 is linked to the control means 41.

  As shown in FIGS. 6A and 7, the separation detection unit 40 includes the sensor main body 40 a, and the detection target body 40 b provided on the engine side portion 28 a by being supported by the fastening tool 33. It is configured with.

  The sensor main body 40a is constituted by a terminal comprising a pair of terminal main bodies linked to the control means 41 via a harness 40c in a holder. The detection target body 40b is constituted by a coupler in which a connection line for connecting the pair of terminal bodies is built in a holder.

  FIG. 6B shows the detection state of the separation detection means 40. As shown in this figure, when the connection portion 29 is switched to the separated state, the connection between the terminal and the coupler is released, and the connection between the pair of terminals is released. Then, the sensor main body 40a does not detect the detection target body 40b. As a result, the separation detection unit 40 enters a detection state in which the switching of the connection unit 29 to the separation state is detected, and outputs the detection result to the control unit 41.

  FIG. 6A and FIG. 7 show a non-detection state of the separation detection means 40. As shown in these drawings, when the connecting portion 29 is switched to the connected state, the terminal and the coupler are connected to connect the pair of terminals. Then, the sensor main body 40a detects the detection target body 40b. As a result, the separation detection means 40 enters a non-detection state.

The control means 41 is configured by using a microcomputer, and when the separation detection means 40 is in a detection state, the engine start check means 42 is operated in an operating state based on information detected by the separation detection means 40. To do.
When the separation detection means 40 is in the non-detection state, the control means 41 operates the engine start check means 42 to the release state based on information from the separation detection means 40.

When the engine start check means 42 is operated to the operating state, the engine start check means 42 is used for making the engine start device 43 and disables the engine start by the engine start device 43. That is, the engine starter 43 does not operate the engine starter motor even when the key switch is turned on.
When the engine start check means 42 is operated to a release state, the engine start check means 42 releases the check production for the engine start device 43 and allows the engine start device 43 to start the engine 3. That is, the engine starter 40 operates the engine starter motor when the key switch is turned on.

  That is, when the engine bonnet 21 is closed, the air cleaner side portion 28b of the intake passage 28 and the engine side portion 28a are connected, so that the engine 3 is combusted with dust removed by the pre-air cleaner 24 and the air cleaner 23. Aspirate air. When the engine bonnet 21 is opened, the air cleaner side portion 28a and the engine side portion 28b of the intake passage 28 are separated, so that when the engine 3 is driven, dust removal by the pre-air cleaner 24 and the air cleaner 23 is performed. The combustion air that is not discharged may be sucked and dust may be sucked together with the air. For this reason, when the engine bonnet 21 is closed, the control means 41 switches the engine start check means 42 to the released state so that the engine 3 can be started so that the engine 3 can be driven. When the engine 21 is released, the engine start check means 42 is switched to the operating state to disable the start of the engine 3 so that the engine 3 cannot be driven.

[Another Example]
In order to detect the separated state of the connecting portion 29, instead of the above-described embodiment, a configuration using a proximity switch may be adopted. Alternatively, the sensor body 40a is provided in the engine side portion 28a, and the detection target body 28b is provided as an air cleaner. Even if the configuration provided in the side portion 20b is adopted, the object of the present invention can be achieved.

Side view of work equipment Top view of the work machine with the engine hood closed Top view of the working machine with the engine hood open Side view of the driving part and the driving part Rear view of prime mover (A) is a side view of the connection portion in the connected state, and (b) is a side view of the connection portion in the separated state. Sectional view of the connected part in the connected state Block diagram of engine start control

Explanation of symbols

3 Engine 21 Engine Bonnet 23 Air Cleaner 28 Intake Passage 28a Engine Side Portion 28b Air Cleaner Side Portion 29 Connecting Portion 33 Fastener 40 Separation Detection Unit 40a Sensor Body 40b Detection Object 41 Control Unit 42 Engine Start Checking Unit

Claims (3)

A working machine with an engine bonnet swingably openable,
Switchable connection between the intake passage that allows the air cleaner to communicate with the engine and a connection state in which the air cleaner side portion and the engine side portion of the intake passage communicate with each other and a separated state in which the air cleaner side portion and the engine side portion are separated Set up a section,
Separation detecting means for detecting the switching of the connecting portion to the separated state, and engine start restraining means capable of switching between an operating state for performing the engine start restraint and a release state for permitting the engine start. ,
The detection information by the separation detection means is set so that the engine start check means is in the release state in the non-detection state of the separation detection means, and the engine start check means is in the operation state in the detection state of the separation detection means. A work machine comprising control means for operating the engine start check means.   The separation detection means comprises a sensor body provided on one of an air cleaner side portion and an engine side portion of the intake passage, and a detection object provided on the other of the air cleaner side portion and the engine side portion. The working machine according to claim 1.   The working machine according to claim 2, wherein one of the sensor main body and the detection target body is supported by a fastening tool that fastens the air cleaner side portion and the engine side portion.

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