JP2008184016A - Crawler work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crawler tractor increased in working efficiency and safety by installing, outside a cabin, breather hoses preventing the tractor from contacting with an obstacle to prevent them from being damaged and preventing rainwater from entering thereinto. <P>SOLUTION: The breather hoses 101L, 101R connected to breather ports 6La, 6Ra at the upper parts of left and right fuel tanks 6L, 6R are inserted between the rear surface 15 of a rear frame 14 and a door cover 19 covering the rear frame 14 to which the rotating pivot shafts 18 of left and right doors 17 of the cabin 4 are attached along the rear surface 15 of the rear frame 14 of the cabin 4, and extended to the lower surface 16a of a roof 16 outside the cabin 4. The other ends 103L, 103R of the breather hoses 101L, 101R are directed downward, and secured to the lower surface 16a of the roof 16 with a mounting member 104. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crawler-type work vehicle including a cabin disposed at the upper part of the fuselage, a driver seat installed in the cabin, and left and right fuel tanks disposed on both sides of the driver seat and outside the cabin. More specifically, a breather hose connected to a breather port provided at the upper part of the left and right fuel tanks is arranged along the surface of the rear frame of the cabin with a surface of the rear frame and a cover attached to the surface of the rear frame. It is related to inserting between and extending to the lower surface of the roof outside the cabin.

  As shown in FIG. 8, a conventional crawler tractor (work vehicle) includes, for example, left and right fuel tanks 153 provided with breather ports 152 on the left and right sides of a driver's seat 151, and the left and right fuel tanks 153. The breather hose 154 connected to each breather port 152 is installed in the inner hole of the square pipe of the Lopps frame 155 in order to release air when fuel is injected inside and to release the pressure applied to the inside of the fuel tank 153 to the outside. The breather hose 154 is protected by the rops frame 155, and the breather hose 154 can be prevented from being damaged from the outside, such as the breaker hose 154 being broken or crushed (Patent Document 1).

JP 2005-178490 A

However, in such a crawler type tractor (work vehicle), since the breather hose is installed in the pipe of the rops frame, it is necessary to pull out the breather hose from the pipe of the rops frame each time the maintenance of the breather hose is performed. There is a problem that the work is troublesome and the work efficiency is lowered, and the breather hose cannot be checked from the outside to check whether the breather hose has been deteriorated or damaged. . In addition, when the driver's seat is in the cabin specification, the breather hose may be provided outside the cabin because the rops frame is removed, but in this case, the breather hose comes into contact with obstacles such as branches during work, There is a problem that the breather hose may be damaged, and that rain or the like flows into the fuel tank through the tip of the breather hose.
SUMMARY OF THE INVENTION An object of the present invention is to provide a crawler tractor that improves workability and safety by providing a breather hose that does not allow contact with obstacles and the like to prevent damage and that does not allow rain to flow into the cabin. It is in.

  For this reason, the invention according to claim 1 is directed to a cabin disposed in the upper part of the fuselage, a driver seat installed in the cabin, and left and right fuels disposed on both sides of the driver seat and outside the cabin. In a crawler type work vehicle including a tank, a breather hose connected to a breather port provided at an upper part of the left and right fuel tanks, along a surface of the rear frame of the cabin, a surface of the rear frame, and a surface of the rear frame And a cover attached to the roof, and extends to the lower surface of the roof outside the cabin.

  According to a second aspect of the present invention, in the crawler work vehicle according to the first aspect, the front end portion of the breather hose is directed downward, and the vicinity of the front end portion of the breather hose is fixed to the lower surface of the roof with an attachment member. It is characterized by doing.

  According to the first aspect of the present invention, the cabin disposed in the upper part of the fuselage, the driver's seat installed in the cabin, the left and right fuel tanks disposed on both sides of the driver's seat and outside the cabin, A breather hose connected to a breather port at the top of the left and right fuel tanks, along the surface of the rear frame of the cabin, and a cover attached to the surface of the rear frame. And extending to the lower surface of the roof outside the cabin, the breather hose can be stably installed outside the cabin. In addition, the deterioration of the breather hose can be easily confirmed by attaching and detaching the door cover, and damage to the breather hose can be prevented from obstacles such as tree branches that can come into contact with the door cover during operation. Therefore, a crawler tractor with improved workability and safety can be provided.

  According to the second aspect of the present invention, the tip of the breather hose is directed downward and the vicinity of the tip of the breather hose is fixed to the lower surface of the roof by the mounting member, so that the fuel is passed through the tip of the breather hose. In the tank, it is possible to prevent dirt, dirt, etc. due to rain or wind. Therefore, a crawler tractor with improved workability and safety can be provided.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 is a left side view of a crawler tractor according to an embodiment of the present invention, FIG. 2 is a plan view of the tractor, FIG. 3 is a cross-sectional side view of the drive unit, and FIG. 4 is a cross-sectional plan view of the drive unit.

  First, a schematic configuration of the crawler tractor 1 will be described. As shown in FIG. 1, a bonnet 2 that covers an engine 3 at a front portion of a vehicle 1 and has a headlight 12 at a front end, and a steering wheel that controls the operation of the vehicle 1 on a steering column 16 at the rear of the bonnet 2. A cabin 5 having a control unit 4 of a vehicle 1 in which a handle 9 and a driver's seat 8 are arranged is disposed on a left and right body frame 11. On the left and right sides of the driver's seat 8, various levers such as a main transmission lever and a sub transmission lever (not shown) for operating the vehicle 1 and raising / lowering a working machine (not shown) are disposed.

  Further, the cabin 5 is formed with a roof 13, a side glass door 14 and the like so as to cover the entire driver's seat 8. The left and right fuel tanks 6 and the left and right flasher lamps 15 are disposed on both sides of the driver's seat 8 and outside the cabin 5. Further, a step 10 for raising and lowering to the driver's seat 8 is provided below the cabin 5, and the working machine that can be removed according to work is attached to the rear of the vehicle 1. Work such as a rotary. In addition, a pair of left and right crawler type traveling devices 80 for traveling the vehicle 1 are disposed below the vehicle 1.

  The crawler type traveling device 80 includes a left and right crawler frame 81 extending in the traveling direction and two side frames 79 that connect the crawler frame 81. A left and right front axle case 82 is fixed to the front end of the crawler frame 81. The left and right drive sprocket 60 is supported on the left and right axles 89 supported by the left and right front axle cases 82. A left and right driven idler 85 is rotatably supported at the rear end of the crawler frame 81, and a crawler belt 88 is wound between the outer periphery of the driving sprocket 60 and the driven idler 85. The four equalizer wheels 86 are rotatably supported between the driven idler 85 and the front and rear.

  Hereinafter, first, the traveling and transmission system of the crawler tractor 1 will be described with reference to FIGS. The left and right axles 89 of the crawler type traveling device 80 are connected to the output shaft of the engine 3 via the forward / reverse switching mechanism 21, the main transmission gear transmission mechanism 22, the auxiliary transmission gear transmission mechanism 23, the traveling transmission shaft 24, and the differential mechanism 25. The PTO output shaft 29 that projects the rear transmission case 30a to the forward / reverse output shaft 26 of the forward / reverse switching mechanism 21 via the PTO clutch 27 and the PTO speed change gear transmission mechanism 28 while driving the vehicle 1 while being connected. Power is transmitted to the work machine that is connected and installed behind the machine body.

  Further, a forward / reverse switching mechanism 21 and a main transmission gear transmission mechanism 22 are provided in a transmission case 30b between the rear transmission case 30a and the engine 3, and the input shaft 31 of the forward / reverse switching mechanism 21 is connected via a damper 32. The main transmission shaft 33 of the main transmission gear transmission mechanism 22 is connected to the forward / reverse output shaft 26 of the forward / reverse switching mechanism 21 while being connected to the output shaft of the engine 3.

  Further, a sub-transmission gear transmission mechanism 23 is provided in the front part of the rear transmission case 30a, and a PTO transmission gear transmission mechanism 28 is provided in the rear part of the rear transmission case 30a. The main transmission shaft 33 is provided with the sub-transmission gear transmission mechanism 23. The auxiliary transmission shaft 34 is connected, the brake shaft 37 of the traveling brake device 36 is connected to the rear end of the auxiliary transmission shaft 34 via a pair of bevel gears 35, and the transmission is transmitted to the front end of the auxiliary transmission shaft 34 via the intermediate shaft 38. The rear end of the shaft 24 is connected.

  Next, the front mission case 30c is provided with a differential mechanism 25 including a left and right planetary gear mechanism 39, and a left and right sides are connected to the front end of the traveling transmission shaft 24 via a differential input shaft 40, a bevel gear 41, and a planetary gear input shaft 42. The planetary gear mechanism 39 is connected, and the traveling shift output from the traveling transmission shaft 24 is transmitted to the left and right axles 89 via the left and right planetary gear mechanisms 39 and the planetary gear output shaft 43, so that the left and right crawler type traveling devices 80 are identical at substantially the same speed. It is set as the structure which drives to a direction and makes the vehicle 1 drive forward or backward.

  Further, the turning HST pump 44 and the turning HST motor 45 of the turning hydraulic transmission mechanism (HST) for turning the machine body are separately arranged. For example, the turning HST pump 44 is arranged on the right outer side of the transmission case 30b. The pump shaft of the turning HST pump 44 is connected to the front end of the main transmission shaft 33 via a set of three transmission gears 46 so that the power after the main transmission is input to the pump shaft, and the front transmission case 30c The turning HST motor 45 is fixed to the front surface of the motor, and the motor shaft of the turning HST motor 45 is connected to the left and right planetary gear mechanism 39 via the left and right reversing bevel gear 49 and the left and right gear shafts 50. Steering output to be shifted by the turning HST motor 45 is transmitted to the left and right axles 89 via the left and right planetary gear mechanism 39, and the left and right crawler traveling Device 80 is driven at a substantially constant speed, and the rotational difference of the left and right crawler type traveling device 80 is proportional to the traveling speed of the main gear shift stage, and the left or right at the same turning radius even if the main gear shift stage is switched. It is set as the structure which turns a body in a direction.

  Furthermore, an air conditioner (not shown) or the like can be provided in the cabin 5 of the vehicle 1. In this case, since the engine 3 is loaded by the air conditioner drive, a controller (not shown) that electronically controls the rotational speed of the engine 3 is provided. With this controller, the number of revolutions of a cooling fan that cools a condenser (not shown) of the air conditioner is proportional to the number of revolutions of the engine 3, and the controller sets the idling speed of the engine 3 to be less than that when the air conditioner is stopped. When the engine 3 is idling up, the speed of the engine 3 is increased so that the controller 3 is proportional to the height of the refrigerant pressure detected by a pressure sensor (not shown). You may make it the structure which sets this.

  Next, a specific configuration of the breather hose that discharges the pressure applied to the inside of the fuel tank to the outside will be described. 5 is a rear view in the vicinity of the fuel tank, FIG. 6 is a left side view showing the rear frame of the fuel tank and the cabin, and FIG. 7 is a rear perspective view showing an enlarged part in the vicinity of the left rear frame.

  The left and right fuel tanks 6L and 6R are made of metal and are mounted on the left and right cradle 13 attached to the lower outer side of the left and right fender frame 12 that is bolted onto the left and right cradle 11 provided at the rear of the left and right crawler frame 81. The left and right cradle 13 and the left and right fender frames 12 are detachably provided by bolt fastening or the like. The left and right fuel tanks 6L and 6R are connected by pipes or hoses (not shown) in the vicinity of their bottoms, and fuel is supplied from one fuel tank 6 to the engine 3.

  Further, the upper surfaces of the left and right fuel tanks 6L and 6R are connected to the inside of the left and right fuel tanks 6L and 6R. Left and right breather ports 6La, 6Ra (only 6La is shown in the figure) are provided.

  In the breather ports 6La and 6Ra of the fuel tanks 6L and 6R, for example, one end portions 102L and 102R of breather hoses 101L and 101R made of a rubber material preferably having oil resistance and flexibility, such as fluorine rubber and synthetic rubber, They are detachably connected by attachments not shown in detail. The material of the breather hoses 101L and 101R is not limited to a rubber material, and may be metallic.

  As shown in FIG. 7, these breather hoses 101L and 101R are provided upright on both sides of the rear end of the cabin 5 above the fuel tanks 6L and 6R to stand the left and right cabin rear frames 100L. , 100R are attached to the rear end surface 100a of the rear end surface 100a, etc. by brackets 106, each of which is provided with an appropriate number. The covers 104L and 104R are covered with the covers 104L and 104R, which are detachably attached to both ends of the covers 104L and 104R with fasteners (not shown). The breather hoses 101L and 101R extend above the fuel tanks 6L and 6R, and the other end portions 103L and 103R of the breather hoses 101L and 101R are located on the lower surface 13a of the roof 13 near both sides of the rear end of the cabin 5. The other end portions 103L and 103R are provided so as to curve downward. The shapes of the covers 104L and 104R and the bracket 106 are not limited to a substantially U-shape in plan view as shown in FIG. 7, but a shape such as a substantially U-shape that allows the covers 104L and 104R to cover the breather hoses 101L and 101R. What is necessary is just to be each shape that 106 can fix breather hose 101L, 101R. The symbol a indicates the traveling direction of the vehicle 1.

  And the other end part 103L, 103R vicinity of breather hose 101L, 101R is fixed to the lower surface 13a of the roof 13, etc. with the attachment member 105, such as a U-shaped metal fitting, as shown in FIG. With such a configuration, the breather hoses 101L and 101R are inserted and installed between the rear end surfaces 100a of the left and right cabin rear frames 100L and 100R and the covers 104L and 104R, and the vicinity of the other end 103L and 103R is the roof 13 Since the fixing member 105 is fixed to the lower surface 13a and the like, the breather hoses 101L and 101R are stably installed outside the cabin 5.

  Here, when the fuel is supplied into the fuel tanks 6L and 6R, the air existing in the fuel tanks 6L and 6R or the internal pressure in the fuel tanks 6L and 6R is increased due to an increase in the outside air temperature. The air or the internal pressure flows along the breather hoses 101L and 101R from the breather ports 6La and 6Ra through the breather hoses 101L and 101R along the upper ends of the breather hoses 101L and 101R, and the other ends of the breather hoses 101L and 101R. Released from the parts 103L and 103R into the outside air.

  Therefore, fuel can be smoothly supplied into the fuel tanks 6L and 6R, and even if the internal pressure in the fuel tanks 6L and 6R rises, this pressure can be released to the outside by the breather hoses 101L and 101R. The safety can be improved by preventing the bursting of 6L and 6R.

  Further, the vicinity of the other end portions 103L, 103R of the breather hoses 101L, 101R is located on the lower surface 13a of the roof 13 of the cabin 5 and is curved downward, so that dirt, dirt, etc. in the air due to rain, wind, etc. It is possible to prevent the breather hoses 101L and 101R from entering the breather hoses 101L and 101R from the other end portions 103L and 103R.

  With the configuration as described above, the deterioration of the breather hoses 101L and 101R can be easily confirmed by attaching and detaching the covers 104L and 104R, and a tree branch that can be touched during the operation by the covers 104L and 104R. It is possible to prevent damage to the breather hoses 101L and 101R from obstacles. Therefore, workability and safety can be improved. The position where the breather hoses 101L and 101R are attached is not limited to the rear end surfaces 100a of the left and right cabin rear frames 100L and 100R, but may be the side surfaces or front surfaces of the left and right cabin rear frames 100L and 100R.

  As described above in detail, the crawler tractor 1 of this example includes a cabin 5 disposed on the upper part of the fuselage 1, a driver seat 8 installed in the cabin 5, and both sides of the driver seat 8, and the cabin The rear frame 100L, 100R of the rear frame of the cabin 5 is provided with breather hoses 101L, 101R connected to the breather ports 6La, 6Ra provided on the left and right fuel tanks 6L, 6R. Inserted between the rear end surface 100a of the rear frames 100L and 100R and the covers 104L and 104R attached to the rear end surfaces 100a of the rear frames 100L and 100R along the rear end surface 100a (surface), It extends to the lower surface 13 a of the roof 13. In addition, the other end portions 103L and 103R (tip portions) of the breather hoses 101L and 101R are directed downward, and the vicinity of the other end portions 103L and 103R is fixed to the lower surface 13a of the roof 13 by the attachment member 105.

  In the above-described example, a crawler tractor (agricultural work machine) has been described as an example of a work machine. However, the present invention is not limited to this, and a combiner or the like as a farm work machine or a backhoe as a construction work machine. Therefore, it can be applied to all working machines equipped with fuel tank and cabin, such as bulltoza.

It is a left view which shows the crawler type tractor as an example of this invention. It is a top view of a crawler type tractor. It is a cross-sectional side view of a drive part. It is a cross-sectional top view of a drive part. It is a rear view of fuel tank vicinity. It is a left view which shows the rear part flame | frame of a fuel tank and a cabin. It is the back perspective view which expanded and showed a part near the left rear frame. It is a left view which shows the fuel tank and the loss frame of the conventional tractor.

Explanation of symbols

5 Cabin 6L, 6R Left and right fuel tanks 6La, 6Ra Breather port 13 Roof 13a Lower surface 100a Rear end surface 100L, 100R Rear frame 101L, 101R Breather hose 102L, 102R One end 103L, 103R The other end (front end)
104L, 104R Cover 105 Mounting member 106 Bracket a Traveling direction

Claims (2)

A cabin located at the top of the aircraft,
A driver seat installed in the cabin;
Left and right fuel tanks disposed on both sides of the driver seat and outside the cabin;
In a crawler type work vehicle comprising:
A breather hose connected to a breather port at the upper part of the left and right fuel tanks is inserted along the surface of the rear frame of the cabin between the surface of the rear frame and a cover attached to the surface of the rear frame. The crawler work vehicle is extended to the lower surface of the roof outside the cabin.   2. The crawler work vehicle according to claim 1, wherein a front end portion of the breather hose is directed downward and a vicinity of the front end portion of the breather hose is fixed to a lower surface of the roof by an attachment member.

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