JPH0732359Y2 - Tractor hydraulic oil tank structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hydraulic oil tank structure for a tractor.

(Prior Art) In a tractor, lubricating oil in a mission case that constitutes a tractor vehicle body is used as hydraulic fluid for hydraulic equipment, and the hydraulic fluid is supplied to the hydraulic equipment via a hydraulic pump and operated from the hydraulic equipment. I try to return the oil to the mission case.

However, when the number of hydraulic devices is increased or the hydraulic devices are increased in size, the capacity is insufficient only with the lubricating oil in the mission case. Therefore, a separate auxiliary tank is provided in the tractor body to secure the capacity of hydraulic oil.

(Problems to be Solved by the Invention) Since the auxiliary tank has been separately provided as described above, there is a drawback that the cost increases and the structure becomes complicated. In addition, there is a case where a mounting frame for mounting a working machine such as a front loader is attached to the lower abdomen of the tractor body, but in this type of tractor, the position of the auxiliary tank is restricted due to the relationship with the mounting frame. Sometimes the installation of the auxiliary tank itself was difficult.

In addition, the conventional auxiliary tank is usually formed in a relatively short rectangular parallelepiped shape, and in order to provide the cooling effect of the working oil to such an auxiliary tank, it is necessary to separately provide an oil coolant, so that the material cost is high. I was following.

In view of such a point, the present invention utilizes the support cylinder of the mounting frame as an auxiliary tank, and makes it possible to obtain the cooling effect of the hydraulic oil simply by inserting one pipe into the support cylinder. This is to solve the conventional problems.

(Means for Solving the Problem) The present invention provides a mounting frame 13 for mounting a working machine, which is provided on the lower abdomen of the tractor vehicle body 1 with support cylinders 19 whose left and right ends project laterally beyond the tractor vehicle body 1. Prepared and tractor body 1
In the tractor using the mission case 4 as the main tank for hydraulic oil, the support cylinder 19 is hermetically sealed to form an auxiliary tank 29 for hydraulic oil, and the position where the support cylinder 19 projects from the tractor body 1 In addition, the pipe 35 communicating with the mission case 4 and the pipe communicating with the hydraulic pump 36 are connected to the same projecting end side of the support cylinder 19, and the pipe 35 communicating with the mission case 4 is connected to the pipe 35 of the support cylinder 19. The inflow pipe 34 is connected inside from the end to which the pipe 35 is connected to the end on the opposite side.

(Operation) When the hydraulic pump 38 is driven, the auxiliary tank 29 is passed through the pipe 37.
The hydraulic oil inside is taken out, and at the same time, the hydraulic oil is replenished from the mission case 4 into the auxiliary tank 29 through the pipe 35 and the inflow pipe 34. In the auxiliary tank 29, the opening end of the inflow pipe 34 and the outlet of the pipe 37 are separated, so that the working oil flows back and forth from one end side to the other end side of the support cylinder 19. .

(Embodiment) The present invention will be described in detail below with reference to the illustrated embodiment.
In the figure, 1 is a tractor body, and a front axle frame 2,
It is composed of an engine 3, a transmission case 4, and the like. The engine 3 is housed in the bonnet 6 together with the radiator 5 and the like. The mission case 4 constitutes a main tank so that the circulating oil inside is used as hydraulic oil. 7 is a front wheel, 8 is a rear wheel, 9 is a steering wheel, and 10 is a driver's seat.

Reference numeral 11 denotes a front loader mounted on the tractor vehicle body 1 via a mounting frame 12, and includes a pair of left and right masts 13, a boom 14 pivotally supported on the upper end of the mast 13, and a boom cylinder 15 for moving the boom 14 up and down. A bucket 16 pivotally supported at the tip of the boom 14 and a bucket cylinder 17 for rotating the bucket 16 are provided.

The mounting frame 12 is provided on the lower abdomen of the tractor body 1,
The mounting frame 12 is constructed as shown in FIGS. 1 and 2. That is, the mounting frame 12 includes a pair of left and right side plates 18 arranged in the front-rear direction on both the left and right sides of the tractor vehicle body 1, and the side plates 18
And a pair of left and right mast attachment portions 20 that are fixed to close the openings at both ends of the support tube body 19. The side plate 18 is fixed to both sides of the engine 3 together with the front wheel shaft frame 2 by bolts 21 at its front end, and bolts 22 are attached to both sides of the mission case 4 at its rear end.
It is fixed by. The side plate 18 is formed by joining three members, but it may be integrated. The pair of left and right side plates 18 are
A tubular body 23 and a reinforcing rod 24 are connected and reinforced, and a pedal shaft 27 that supports a clutch pedal 25 and a pair of left and right brake pedals 26 is rotatably supported by the tubular body 23. Support cylinder
Reference numeral 19 is a cylindrical shape, and the mast mounting portion 20 is a tractor vehicle body 1.
It is provided so as to project laterally from the tractor vehicle body 1 so as to be located on the side of the step 28 of FIG. ing. Both ends of the support cylinder 19 are connected to the side frame 18 via diagonal reinforcing members 30. Mast mount
A fitting portion at a lower end of the mast 13 is fitted into the mast 20 so as to be freely fitted and removed from above, and is fixed by a cotter bolt 31.

As shown in FIG. 3, an L-shaped inlet joint 32 and an outlet joint 33 are attached to the support cylinder 19 at positions projecting laterally from the tractor body 1. At the lower end of the inflow joint 32,
An inflow pipe 34 extending to the vicinity of the end on the opposite side inside the support cylinder 19 is connected, and the extraction joint 33 is opened at the lower end thereof. Therefore, the inlet and outlet of the hydraulic oil are large in the left and right inside the auxiliary tank 29 (they are in a separated positional relationship. The inflow joint 32 is connected to the transmission case 4 by a pipe.
35 is connected, and a pipe 37 communicating with the hydraulic pump 36 is connected to the extraction joint 33. And these pipes 35,3
7 is arranged above the lowermost surface of the mounting frame 12. The hydraulic pump 36 is mounted on the front side between the pair of left and right front axle frames 2, and is directly connected to the engine 3 via a drive shaft. The support cylinder 19 is below the lower surface of the mission case 4, and the pipes 35 and 37 are provided along the tractor body 1.

In FIG. 4, reference numeral 45 denotes a backhoe, which is mounted on the rear portion of the tractor vehicle body 1 via a mounting frame 46.

In the above configuration, when the hydraulic pump 36 is driven, the piping 3
7. The hydraulic oil in the auxiliary tank 29 is taken out through the take-out joint 33. Then, hydraulic oil is replenished from the mission case 4 into the auxiliary tank 29 through the pipe 35, the inflow joint 32, and the inflow pipe 34 by the amount of the taken out oil. In this case, since the open end of the inflow pipe 34 and the take-out joint 33 are greatly separated from each other in the left and right, the hydraulic oil in the auxiliary tank 29 flows from one end side to the other end side. Therefore, there is a cooling effect of the hydraulic oil, the rise of the oil temperature can be prevented, and the accumulation of the hydraulic oil in the auxiliary tank 29 can be prevented.

Since the rigid supporting cylinder 19 that forms a part of the mounting frame 12 is used as the auxiliary tank 29, the structure is simple and rigid compared to the case where it is separately provided, and there is no fear of damage, etc. Moreover, it is possible to secure an appropriate ground clearance without being restricted by location,
Free design is possible. Also, because there are fewer parts,
It can be manufactured at low cost and the cost is reduced.

Further, since the pipes 35 and 37 are connected to the support tubular body 19 at positions projecting laterally from the tractor vehicle body 1, they can be arranged along the tractor vehicle body 1 and above the lowermost surface of the mounting frame 12. Since it is arranged in the above, it is not necessary to cover the pipes 35 and 37.

Although the joints 32 and 33 are provided on the upper surface side of the support cylinder 19 in the embodiment, they may be provided on the front and rear sides.

As shown in FIG. 6, the mounting frame 12 is provided with mounting brackets 42, 43 on the support cylinder 19 via members 40, 41, and the mounting brackets 42, 43 are used for the engine 3 and the mission case 4.
It may be fixed to. Left and right mounting brackets 43
Are connected by a connecting member 44.

(Effect of the Invention) According to the present invention, the support cylinder 19 forming a part of the mounting frame 12
Since it is used as the auxiliary tank 29, it is not necessary to separately provide an auxiliary tank and can be manufactured inexpensively, and the manufacturing cost of the hydraulic oil tank structure can be reduced.

Further, since the inflow pipe 34 that extends from the end to which the pipe 35 is connected inside the support cylinder 19 to the end on the opposite side is connected to the pipe 35 that communicates with the mission case 4, the hydraulic oil is supported. It flows back and forth from one end side of the cylindrical body 19 to the other end side. Therefore, the effect of cooling the hydraulic oil can be obtained without providing a separate oil coolant, and from this point as well, the manufacturing cost of the tank structure can be reduced.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a partially cutaway plan view of a mounting frame, FIG. 2 is a side view of the same section, and FIG. 3 is III- of FIG. FIG. 4 is a side view of the whole, and FIG. 5 is a plan view of a mounting frame showing another embodiment. 1 ... tractor body, 3 ... engine, 4 ... mission case, 11 ... front loader, 12 ... mounting frame, 18 ...
… Side plate, 19 …… Supporting cylinder, 29 …… Auxiliary tank, 34 …… Inflow pipe, 35,37 …… Piping.

Claims (1)

[Scope of utility model registration request] 1. A mounting frame (13) for mounting a working machine, comprising a support tube body (19) having left and right ends projecting laterally beyond the tractor vehicle body (1) at the lower abdomen of the tractor vehicle body (1). A tractor having the transmission case (4) of the tractor vehicle body (1) as a main tank for hydraulic oil, the support tubular body (19) being configured to be a hermetically sealed auxiliary tank (29) for hydraulic oil. A pipe (35) communicating with the transmission case (4) and a pipe communicating with the hydraulic pump (36) are provided at a position where the support cylinder (19) projects from the tractor body (1). ) Is connected to the same projecting end side of the transmission case (4), and to the pipe (35) communicating with the mission case (4), the end opposite to the end to which the pipe (35) is connected inside the support cylinder (19) A tractor characterized by connecting an inflow pipe (34) extending to the section Hydraulic oil tank structure of.