JP4489908B2 - Crawler type traveling vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crawler type traveling vehicle.
[0002]
[Prior art]
Conventionally, as one form of a crawler type traveling vehicle, a vehicle body frame is interposed between a pair of left and right traveling parts, a prime mover part is disposed on the front part of the vehicle body frame, and a driving part is located at a rear position of the prime mover part. And a fuel tank and a hydraulic oil tank are provided at a position behind the operating section.
[0003]
The fuel tank and the hydraulic oil tank are arranged such that one tank is disposed on the left side and the other tank is disposed on the right side on the vehicle body frame so that the left and right balance of the vehicle body is well maintained.
[0004]
[Problems to be solved by the invention]
However, the above-described traveling vehicle has a problem that when the capacity of the fuel tank is increased, the left-right balance of the vehicle body cannot be maintained well unless the capacity of the hydraulic oil tank is increased unnecessarily.
[0005]
In addition, since the fuel tank is arranged behind the operation unit, it is necessary to maintain good visibility of the operator seated in the operation unit. From this point, the size of the fuel tank is limited. .
[0006]
[Means for Solving the Problems]
Therefore, in the present invention, a vehicle body frame is interposed between a pair of left and right traveling parts, a prime mover part is disposed on the front part of the vehicle body frame, and a driving part is disposed at a rear position of the prime mover part. In a crawler-type traveling vehicle in which a fuel tank is disposed at a rear position of the driving section, the fuel tank is formed in two parts on the left and right sides, and at a position behind the driving section and above the left and right traveling sections. The vehicle body frame is provided with a pair of left and right vehicle body frame side forming pieces extending in the front-rear direction, and a hydraulic oil tank is arranged between the vehicle body frame side portion forming pieces, and the hydraulic oil tank is a pair of left and right hydraulic oil tanks. It is intended to provide a crawler-type traveling vehicle characterized in that it is disposed below the floor portion of the driving portion that is stretched between the body frame side portion forming pieces.
[0007]
The present invention is also characterized by the following configuration.
[0008]
(1) The hydraulic oil tank is disposed in a heat radiating air passage formed by both body frame side portion forming pieces and the floor portion .
[0009]
(2) A turning HST and a straight traveling HST are arranged between the vehicle body frame side portion forming pieces .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0011]
That is, the crawler type traveling vehicle according to the present invention has a basic structure in which a body frame is interposed between a pair of left and right traveling parts, and a prime mover part is disposed at a front part on the body frame. An operating part is disposed at a rear position of the fuel tank, and a fuel tank is disposed at a rear position of the operating part.
[0012]
As a characteristic structure, the fuel tank is divided into two parts on the left and right sides, and is arranged at a position behind the driving part and above the traveling part on the left and right sides.
[0013]
In addition, the vehicle body frame includes a pair of left and right vehicle body frame side portion forming pieces extending in the front-rear direction, and a turning HST, a straight traveling HST, and a hydraulic oil tank are disposed between the vehicle body frame side portion forming pieces. The hydraulic oil tank is disposed below the floor portion of the operating portion that is stretched between a pair of left and right body frame side portion forming pieces.
[0014]
In this way, it is possible to increase (double) the fuel tank capacity while ensuring good left-right balance of the vehicle body by the fuel tank and the rear visibility of the operator seated on the driving section.
[0015]
And the cooling efficiency of a hydraulic-oil tank can also be made favorable.
[0016]
In the present invention, the car wash pump is disposed in the front part between the pair of left and right body frame side part forming pieces.
[0017]
In this way, by removing the power from the front PTO shaft provided on the vehicle body and driving the car wash pump, the car wash pump can be used easily at the work site using the car wash pump after the work is completed. Yes.
[0018]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0019]
A shown in FIGS. 1 to 3 is a crawler type traveling vehicle according to the present invention. The traveling vehicle A includes a lifting connection mechanism B at the rear, and various working devices C are connected to the lifting connection mechanism B. Can be moved up and down.
[0020]
As shown in FIGS. 1 to 3, the traveling vehicle A has a vehicle body frame 2 interposed between a pair of left and right traveling units 1, 1, and a prime mover unit 3 is disposed at the front of the vehicle body frame 2. The operation unit 4 is disposed at the rear position of the prime mover unit 3, and the fuel tank 5 is disposed at the rear position of the operation unit 4.
[0021]
The traveling unit 1 attaches the driving wheel 11 to the front end portion of the traveling frame 10 extending in the front-rear direction via a front transmission case 25 described later, and attaches the driven wheel 12 to the rear end portion via an idler fork 13. A crawler belt 14 is wound between the driving wheel 11 and the driven wheel 12. 11a is a drive shaft, 12a is a driven shaft, 15 is an upper rolling wheel, and 16 is a lower rolling wheel.
[0022]
The body frame 2 includes a pair of left and right body frame side forming pieces 20 and 20 extending in the front-rear direction, and a front and rear body frame horizontally placed between the front and rear end portions of the both body frame side portion forming pieces 20 and 20. And rear end portion forming pieces 21 and 22.
[0023]
The vehicle body frame 2 is connected to the traveling frames 10 and 10 of the traveling units 1 and 1 via front left and right side connecting bodies 23 and 23 and rear left and right side connecting bodies 24 and 24.
[0024]
Further, a front mission case 25 is horizontally mounted between the front left and right connecting bodies 23, 23, and the drive wheels 11, 11 are respectively connected to the left and right end portions of the front mission case 25 as drive shafts 11a, 11a. Is attached.
[0025]
The prime mover section 3 is mainly equipped with an engine E, and a front speed reduction case 30 is linked to a front position of the engine E via a first transmission shaft 31 and connected to the output side of the front speed reduction case 30. The input side of the turning HST (hydrostatic hydraulic continuously variable transmission) 32 is linked and connected, and the input side of the front mission case 25 is linked and linked to the output side of the turning HST 32.
[0026]
A front PTO shaft (not shown) is interlocked and connected to the other output side of the turning HST 32, and the front PTO shaft projects forward, and the car wash pump 40 is connected to the front PTO shaft. The car wash pump 40 is disposed at the front part between the pair of left and right body frame side part forming pieces 20,20.
[0027]
In this way, by removing the power from the front PTO shaft provided on the vehicle body and driving the car wash pump 40, the car wash work can be easily performed using the car wash pump 40 after the work is completed even at the work site. I have to.
[0028]
Moreover, since the car wash pump 40 is disposed in the front part between the pair of left and right body frame side portion forming pieces 20, 20, the car wash pump 40 can also function as a front weight, Good balance can be maintained.
[0029]
Furthermore, since the car wash pump 40 is arranged at the front part between the pair of left and right body frame side part forming pieces 20, 20, the car wash pump 40 can be arranged at a position where it cannot be seen from the outside, Good aesthetics of the vehicle body can be secured.
[0030]
Further, a straight traveling HST (hydrostatic continuously variable transmission) 34 is linked to the rear position of the engine E via a rear transmission case 33, and the input side of the rear transmission case 33 is connected to the output side of the straight traveling HST 34. The input side of the front transmission case 25 is connected to the output side of the rear transmission case 33 via the second transmission shaft 35 while the vehicle body frame 2 is connected to the other output side of the rear transmission case 33. The rear side PTO shaft 38 is connected to the input side of the rear speed reduction case 36 arranged at the rear side through the third transmission shaft 37, and the rear PTO shaft 38 is connected to the output side of the rear speed reduction case 36. Projecting backwards.
[0031]
Thus, the engine E → the first transmission shaft 31 → the front deceleration case 30 → the turning HST 32 → the turning power transmission system in which power is transmitted to the front transmission case 25, and the engine E → the straight traveling HST 34 → the rear part. A transmission power transmission system for transmitting power to the transmission case 33 → second transmission shaft 35 → front transmission case 25 is formed so that the power of the turning power transmission system and the power transmission system for straight travel Combined by a planetary gear mechanism (not shown) provided in the front mission case 25, and transmits the resultant force to the drive wheels 11 and 11 via the drive shafts 11a and 11a, respectively, so that the vehicle body travels straight. In addition, the vehicle can be turned in either the left or right direction.
[0032]
The driving unit 4 has a floor portion 41 stretched between the center portions of the pair of left and right body frame side portion forming pieces 20 and 20, and a handle column 42 is erected on the front portion of the floor portion 41. A handle (steering wheel) 43 is attached to the upper end of 42, a seat 44 is disposed behind the handle 43, a shift lever 45 is disposed upright on the right side of the seat 44, and the shift lever 45 The first and second working device operating levers 46 and 47 for operating the various working devices C are arranged upright in the rear position. 48 is a cabin.
[0033]
The handle 43 is linked to the aforementioned turning HST 32 so that the turning operation can be performed by the handle 43, while the speed change lever 45 is linked to the aforementioned straight travel required HST 34 and is turned by the speed changing lever 45. The forward / reverse switching operation and the shifting operation can be performed.
[0034]
The fuel tank 5 is divided into a left tank body 50 and a right tank body 51, and the tank body 50, 51 is positioned at the rear of the operation unit 4 and above the left and right traveling units 1,1. The bottoms of both tanks 50 and 51 are connected to each other by a fuel communication pipe 52, and the ceilings of both tanks 50 and 51 are connected to each other by an air communication pipe 53. A fuel supply unit 54 is provided in the left tank body 50.
[0035]
The tank main bodies 50 and 51 are placed on tank main body stays 55 and 55 that extend in a substantially horizontal manner outward from the rear part of the vehicle body frame side part forming pieces 20 and 20, respectively. 1,1 is located above. 58 is a fuel tank cover body.
[0036]
In this way, the fuel tank capacity can be increased (doubled) while the left and right tank bodies 50 and 51 can ensure the left-right balance of the vehicle body and the rear visibility of the operator seated on the driving unit 5. I am doing so.
[0037]
Therefore, even in a long work, the work can be continuously performed without interrupting the work for refueling.
[0038]
In addition, since the tank bodies 50 and 51 are arranged above the traveling parts 1 and 1, the fuel supply part 54 of the left tank body 50 can be easily refueled from a position near the outside of the traveling part 1. The fuel is supplied smoothly from the tank main body 50 to the engine E.
[0039]
Further, the turning HST 32, the rectilinear HST 34, and the hydraulic oil tank 56 are arranged between the pair of left and right body frame side portion forming pieces 20, 20, and the hydraulic oil tank 56 includes the operating unit 4 described above. It arrange | positions under the floor part 41 of this, and has arrange | positioned in the heat radiating air channel 57 formed by the left-right paired body frame side part formation pieces 20 and 20 and the floor part 41 of the driving | running | working part 4.
[0040]
In this way, the hydraulic oil tank 56 is disposed between the pair of left and right body frame side portion forming pieces 20 and 20 together with the turning HST 32 and the straight traveling HST 34, and is substantially the same ground level as these HST 32 and 34. The connecting pipes (not shown) to these HSTs 32 and 34 are shortened so that pressure oil can be supplied smoothly through the connecting pipes.
[0041]
In addition, the hydraulic oil tank 56 is arranged in a state where it can easily be exposed to the outside air in the radiating air passage 57 so that the hydraulic oil tank 56 can be efficiently cooled.
[0042]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0043]
(1) In the present invention according to claim 1, the fuel tank is divided into two parts on the left and right sides, and is disposed at the rear position of the driving part and above the right and left traveling parts. The fuel tank capacity can be increased (doubled) while the right and left balance of the vehicle body and the rear visibility of the operator seated on the driving section are ensured.
[0044]
Therefore, even in a long work, the work can be continuously performed without interrupting the work for refueling.
[0045]
In addition, since the fuel tank is disposed above the traveling section, the fuel tank can be easily refueled and the fuel can be smoothly supplied from the fuel tank to the prime mover section. Can do.
[0046]
In addition, the vehicle body frame includes a pair of left and right vehicle body frame side portion forming pieces extending in the front-rear direction, and a hydraulic oil tank is disposed between the two vehicle body frame side portion forming pieces. Since the fuel tank is disposed below the floor of the operating section stretched between the frame side portion forming pieces, the fuel tank in the above (1) can be easily arranged, and from this point, the fuel tank capacity can be easily increased. .
[0048]
(2) In the second aspect of the invention, a hydraulic oil tank, wherein because of the arranged on both body frame side forming members and the heat radiating air passage formed by said floor portion, the radiator air passage It is possible to efficiently cool the hydraulic oil tank disposed in a state where it can be easily exposed to the outside air.
[0049]
As a result, the working oil in the working oil tank can be maintained at a suitable temperature, and the working efficiency of various working devices using the working oil can be improved.
[0050]
Since the hydraulic oil tank is arranged between the pair of left and right body frame side portion formation pieces, it becomes easy to arrange a hydraulic actuator and a hydraulic valve immediately above the hydraulic oil tank. Maintenance can be performed easily and no oil leakage occurs.
[0051]
(3) In the present invention described in claim 3 , since the turning HST and the rectilinear HST are arranged between the body frame side portion forming pieces, the turning HST and the rectilinear HST are substantially the same as the hydraulic oil tank. While being able to arrange compactly at the same ground level, it is possible to shorten the connecting pipe connecting the turning HST and the hydraulic oil tank, and the straight traveling HST and the hydraulic oil tank .
[Brief description of the drawings]
FIG. 1 is a side view of a crawler type traveling vehicle according to the present invention.
FIG. 2 is an explanatory plan view of the traveling vehicle.
FIG. 3 is a rear view of the traveling vehicle.
[Explanation of symbols]
A traveling vehicle 1 traveling unit 2 body frame 3 prime mover unit 4 driving unit 5 fuel tank
10 Travel frame

Claims (3)

A body frame (2) is interposed between the pair of left and right traveling parts (1, 1), and a prime mover part (3) is disposed at the front of the body frame (2). In a crawler type traveling vehicle in which a driving unit (4) is disposed at a rear position and a fuel tank (5) is disposed at a rear position of the driving unit (4),
The fuel tank (5) is divided into two parts on the left and right sides, and is disposed behind the operating part (4) and above the left and right traveling parts (1, 1), respectively .
The vehicle body frame (2) includes a pair of left and right vehicle body frame side portion forming pieces (20, 20) extending in the front-rear direction, and a hydraulic oil tank (56) between the vehicle body frame side portion forming pieces (20, 20). And the hydraulic oil tank (56) is disposed below the floor portion (41) of the operating portion (4) stretched between the pair of left and right body frame side portion forming pieces (20, 20). A crawler-type traveling vehicle. The hydraulic oil tank (56) is disposed in a heat radiating air passage (57) formed by the vehicle body frame side portion forming pieces (20, 20) and the floor portion (41). Item 2. A crawler-type traveling vehicle according to Item 1. The crawler type traveling vehicle according to claim 1 or 2 , wherein a turning HST (32) and a straight traveling HST (34) are arranged between the body frame side portion forming pieces (20, 20) .

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