JP2002257215A - Arranging structure of oiling port on working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily supply lubricating oil to a transmission case of a working vehicle. SOLUTION: A front side flange 6b of an intermediate case 6 and a drum part 6a of the intermediate case 6 which is to be connected to the flange 6b are reinforced, by using a reinforcing member 34a, an oiling port 35 of the lubricating oil is provided on the reinforcing member 34a, and the lubricating oil is supplied to the transmission case 5 via the oiling port 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an agricultural tractor,
Alternatively, the present invention relates to an arrangement structure of an oil supply port for supplying lubricating oil to a transmission case of a working vehicle such as a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, in this type of working vehicle, there is known a transmission vehicle in which a transmission case is provided at a rear portion of an airframe, and an intermediate case is disposed between the transmission case and a clutch housing provided at a front side. An oil supply port for supplying lubricating oil is provided at an upper portion of the transmission case. When the lubricating oil in the transmission case deteriorates, the lubricating oil is drained and replaced with a new one.

[0003]

However, as described above, the driver's seat is disposed above the lubricating oil supply port provided at the upper part of the transmission case, that is, above the transmission case. Since the transmission case is located below the driver's seat and the transmission case is covered with a cover for mounting the driver's seat, etc., when lubricating oil is supplied to the transmission case, first, a preparation work for exposing the oil supply port, that is, operation, Work such as tilting the seat to partially remove the cover for mounting the driver's seat has to be performed, which causes a problem that it takes time to replace the lubricating oil.

[0004]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and has a driver's foot above an intermediate case in which a clutch housing and a transmission case are integrally connected. In a working vehicle on which a step serving as a mounting surface is mounted, a lubricating oil supply port is provided at a front portion of an intermediate case projecting upward from the step, and lubricating oil is supplied to the transmission case via the oil supply port. This is a first feature of the configuration.

[0005] Second, the front flange of the intermediate case and the body of the intermediate case joined to the flange are reinforced with a reinforcing member, and a lubricating oil supply port is provided in the reinforcing member. The feature is.

[0006]

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the body of the agricultural tractor 1 includes a chassis 3 attached to a side of an engine 2 disposed in front of the body, a clutch housing 4 connected to the engine 2, and a clutch housing 4 and a transmission case 5 integrated. The clutch case 4 and the intermediate case 6 are provided with a step 7 to be described later. The front wheel 8 is mounted on a front wheel axle 9 a of a front axle case 9 supported on a lower portion of the chassis 3. A rear wheel 11 is mounted on a rear wheel axle 10a integrally formed on the left and right sides of the transmission case 5.

[0007] As shown in FIG. 2, the power of the engine 2 is supplied to a flywheel 12 in the clutch housing 4.
The gear is decelerated through a gear 16 and a gear 17 meshing therewith via a disc 13 attached to the clutch shaft 15 and a clutch 15 provided on the clutch shaft 14, and the step 7 is positioned at a low position on the hollow intermediate transmission shaft 18 in the intermediate case 6. Is transmitted one step downward so that And running and PT
In the transmission case 5 in which the O transmission mechanism is mounted, a gear 19 provided at the end of the intermediate transmission shaft 18 and the gear 1
The input shaft 21 is driven via a gear 20 that meshes with the input shaft 9. Further, a PTO that extracts power from the input shaft 21 to the pinion shaft 24 that drives the rear wheel 11 via the speed change shafts 22 and 23 and the speed change gear mounted on the input shaft 21 and the tilling work machine connected to the rear part of the body. It is configured to transmit to the shaft 25. A transmission gear 26, which is freely rotatably supported on the PTO shaft 25 and transmitted from the pinion shaft 24, drives a drive shaft 28 via a front wheel speed increasing device 27. The drive shaft 28 is connected by a joint 29. The front wheel drive shaft 30 is driven.

The tractor 1 having the above-described configuration operates the input shaft 2 from the clutch shaft 14 via the intermediate transmission shaft 18 by starting the engine 2 and operating each transmission mechanism.
1 is driven, and further, the front wheel 8 and the rear wheel 11 are rotated via the speed change shafts 22 and 23 so that the machine body can travel forward and backward at a desired traveling speed. Power can be transmitted to

As shown in detail in FIG. 3, the intermediate case 6 has flanges 6 around a hollow body 6a made of a steel plate.
b and 6c are joined to form a hermetic shape, and the above-mentioned hollow intermediate transmission shaft 18 is supported above the two flanges 6b and 6c via a bearing holder.
Both ends of a pipe 31 covering the intermediate transmission shaft 18 are fixed. A guide pipe 32 for inserting and protecting the front wheel drive shaft 30 is provided at a position close to the bottom wall 6d of the intermediate case 6, which is a lower portion between the flanges 6b and 6c, and both ends of the pipe 32 are fixed. And these pipes 31, 32
This increases the rigidity of the entire intermediate case 6.

The flanges 6b and 6c provided on the front and rear of the intermediate case 6 face the open ends of the clutch housing 4 and the transmission case 5, respectively, and are fastened using bolts to integrate the three members. Is bound to. On the upper side of the trunk 6a, a flat step 7 serving as a footrest surface of the driver is mounted. A pipe 33 protruding laterally from the middle of the body 6a penetrates a support shaft of a brake pedal and a clutch pedal (not shown), and also serves as a reinforcing member for the intermediate case 6 made of a steel plate.

As shown in FIGS. 3 and 4, the upper portions of the flanges 6b and 6c of the intermediate case 6 projecting upward from the step 7 and the intermediate case 6 joined to the flanges 6b and 6c. The upper part of the body part 6a is welded and reinforced by using reinforcing members 34a and 34b having a U-shaped cross section, in particular, the front reinforcing member 34a and the front flange 6b.
The space S formed by the upper part of the body 6a is in a closed state. Further, a pipe-shaped oil supply port 35 for supplying lubricating oil is provided in the reinforcing member 34a, and an oil supply plug 36 is attached to the oil supply port 35. An inflow hole 37 for allowing lubricating oil to flow from the space S into the clutch housing 4 is provided at the upper corner of the flange 6b and the body 6a of the intermediate case 6 joined to the flange 6b. It constitutes a lubricating oil supply path. Further, since the clutch housing 4 and the transmission case 5 are connected to each other by the hollow intermediate transmission shaft 18 above the intermediate case 6, a flow obstruction of the lubricating oil due to a pressure difference between the two may occur. The lubricating oil flowing down to the bottom of the clutch housing 4 smoothly flows from the guide pipe 32 below the intermediate case 6 to the transmission case 5.
Flows in.

As described above, the front wheel drive shaft 30 is inserted through the guide pipe 32 disposed in the intermediate case 6,
In addition, since it is transmitted under the abdomen of the aircraft protected,
Even if the lower part of the intermediate case 6 collides with the ridge when the tractor 1 runs over the ridge, the front wheel drive shaft 3
0 can transmit power satisfactorily without being damaged. Even if the temperature of the lubricating oil in the clutch housing 4 rises with the driving of a number of members such as the clutch 15, the lubricating oil in the transmission case 5 passes through the guide pipe 32 at the lower portion to engage the clutch. Since the oil enters the housing 4 and circulates through the hollow intermediate transmission shaft 18 in the upper part, the exchange of the lubricating oil in the clutch housing 4 and the transmission case 5 is performed appropriately and efficiently, and the oil temperature is increased. Does not rise locally.

The flange 6 on the front side of the intermediate case 6
Since the outside of the reinforcing member 34a of b is covered with a panel cover 38 that covers the rear part of a support member for erection of a handle, a meter, and the like, a portion of the panel cover 38 corresponding to the position of the fuel plug 36 is notched, Alternatively, an appropriate hole is provided so that the position of the fuel filler plug 36 is notified and the attachment and detachment thereof can be easily performed. The reinforcing member 34b of the flange 6c on the rear side of the intermediate case 6 is covered with a driver's seat support cover 40 hanging downward in front of the driver's seat 39.

As described above, according to the present invention, the lubrication oil supply port 35 for supplying lubricating oil is provided in the reinforcing member 34a of the intermediate case 6 projecting upward from the step 7, so that lubricating oil can be replenished or lubricated. When the oil deteriorates, first, an appropriate amount of lubricating oil is filled in a portable oil tank, and the oil tank is stably placed on the step 7 serving as a footrest surface of the driver. Then, the lubricating oil may be supplied to the oil supply port 35 using a manual pump or the like. Therefore, the troublesome preparation work of tilting the driver's seat, partially removing the cover for mounting the driver's seat, and exposing the lubricating oil supply port, as in the conventional lubricating oil supply work, is completely unnecessary. Since it is sufficient to simply prepare to remove the fuel filler plug 36 attached to the fuel filler port 35, the working time can be greatly reduced. Further, since the lubricating oil supply port 35 provided in the reinforcing member 34a is located at the front of the substantially central portion in the left-right width direction of the step 7, visibility from the driver's seat is good,
Moreover, it does not obstruct the driver's feet.

[0015]

According to the present invention, as described above, the lubricating oil supply port 3 is provided at the front of the intermediate case 6 projecting upward from the step 7.
5, the lubricating oil is supplied to the transmission case 5 through the supply port 35. Therefore, as in the conventional lubricating oil supply operation, the driver's seat is tilted and the cover for mounting the driver's seat is provided. The troublesome preparatory work of partially removing the lubricating oil supply port and exposing the lubricating oil supply port is not required at all, so that the working time can be greatly reduced. When supplying the lubricating oil to the mission case, the lubricating tank is stably mounted on the step 7 serving as a footrest surface of the driver, and thereafter the lubricating oil is easily supplied using a manual pump or the like. Mouth 3
5 can be easily refueled. Further, the fuel supply port 35 is provided in the reinforcing member 34a of the intermediate case 6 located at the front of the substantially central portion in the width direction of the step 7, so that visibility from the driver's seat is good, and the fuel supply port 35 is reinforced. Since it is provided on the inclined surface of the member 34a, it does not obstruct the driver's feet.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of an agricultural tractor.

FIG. 2 is a sectional view of a clutch housing, an intermediate case, and a transmission case.

FIG. 3 is a sectional view of an intermediate case.

FIG. 4 is a sectional view taken along the line AA in FIG.

[Description of Signs] 4 Clutch housing 5 Transmission case 6 Intermediate case 6a Body 6b Front flange 7 Step 34a Reinforcing member 35 Oil filler

Claims (2)

[Claims] 1. A work vehicle in which a step (7) serving as a footrest surface of a driver is mounted above an intermediate case (6) in which a clutch housing (4) and a transmission case (5) are integrally connected. The lubricating oil supply port (3) is provided at the front of the intermediate case (6) projecting upward from the step (7).
5) The lubrication port arrangement in a working vehicle, wherein lubrication oil is supplied to the transmission case (5) through the lubrication port (35). 2. A front flange (6) of an intermediate case (6).
b) and the body (6a) of the intermediate case (6) joined to the flange (6b) are reinforced with a reinforcing member (34a), and a lubricating oil supply port is provided to the reinforcing member (34a). The arrangement structure of a filler port in a working vehicle according to claim 1, wherein (35) is provided.