JPH05221339A - Front axle frame of tractor - Google Patents

Abstract

PURPOSE:To reinforce the front axle frame of a vehicle consisting of a plate- shaped frame. CONSTITUTION:Thick steel plates 34, which extends back and forth in the longitudinal direction of a pair of right and left plate-shaped frames 7, are fixed above a pair of right and left plate shaped frames 7, which constitute front axle frames 23, and a pump 36, which is driven by an engine 4, is provided, through a flange35, at the font end of the thick steel plate 34, and a flexible pipe 38 for suction and delivery is connected to the rear of the thick pipe 34.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a front axle frame of a tractor.

[0002]

2. Description of the Related Art A front axle frame of a conventional tractor has a pair of left and right plate-like frames fixed to the left and right standing sides of an engine forming a tractor vehicle body so as to project forward from the engine and also to the front of the engine and the plate. The front axle is mounted on the lower side of the frame.

[0003]

By the way, when the front loader and the backhoe are mounted on the front and rear of the tractor, the hydraulic capacity is increased. Therefore, a pump driven by an engine is mounted on the front axle frame to mount the hydraulic capacity. We have to deal with the increase of. In this case, it is difficult to process the inlet and delivery piping connected to the pump, and problems such as interference with the bolts that fix the plate-shaped frame to the engine and contact with the front wheels occur.

Therefore, the present invention adopts a thick-walled steel pipe as the pipe, and fixes the pipe along the longitudinal direction of the plate-shaped frame to improve the rigidity of the plate-shaped frame while eliminating contact with the front wheels and the like. It is an object to provide a front axle frame for a tractor that is made possible.

[0005]

SUMMARY OF THE INVENTION The present invention is a tractor vehicle body.
A pair of left and right plate-shaped frames 7 are fixed to the left and right side surfaces of the engine 4 which constitutes 6 to project forward from the engine 4, and the front axle 9 is located in front of the engine 4 and below the plate-shaped frame 7. In the front axle frame 23 of the mounted tractor, the following technical measures are taken to achieve the above-mentioned object.

That is, according to the present invention, a thick-walled steel pipe 34 extending forward and backward along the longitudinal direction of the frame 7 is fixed to the upper side of the pair of left and right plate-shaped frames 7, and the front end portion of the thick-walled steel pipe 34 is fixed. Pump 36 driven by engine 4 via joint 35
And a flexible pipe 38 for suction and delivery is connected to the rear portion of the thick steel pipe 34.

[0007]

According to the present invention, when the engine 4 is started, the pump 36 is driven and the liquid is sent to the control section of the hydraulic equipment through the inlet / delivery pipe 38 and the steel pipe 34. The thick-walled steel pipe 34 extending in the longitudinal direction of the plate-shaped frame 7 is fixed to the upper side of the frame 7 and
The rigidity of is improved and the interference with the front wheels 2 etc. is eliminated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail below with reference to the drawings. In FIG.
Is a two-axis, four-wheel type having a pair of left and right front wheels 2 and rear wheels 3, and an engine 4 and a transmission case 5 are connected in series to form a tractor body 6.

A plate-shaped frame 7 is provided on the right and left sides of the engine 4.
Are fastened by bolts 8 or the like and project forward, and a front axle 9 is attached to the plate-like frame 7 on the front side of the engine 4 at the lower portion of the frame to support the left and right front wheels 2.
The front axle 9 is a front wheel drive type in the illustrated example, and the front wheel 2
Is a steering wheel.

The tractor 1 has a vertical mast 10 and this vertical mast.
A front loader 12 is mounted by a loader frame composed of a brace 11 and the like in which 10 and a plate-like frame 7 are connected and fixed, and the loader 12 includes a lift arm 13 and a lift cylinder 14. The vehicle body 6 of the tractor 1 is provided with left and right reinforcing frames 15 extending in the front-rear direction, and a swivel frame 18 of a backhoe 17 is attached to the rear part of the reinforcing frame 15 via a mounting frame 16. Cylinder 20
And so on.

Referring to FIGS. 1 and 2, the pair of left and right plate-shaped frames 7 are strip steel plates, the front ends of which are connected by an end plate 21 and the middle of the front-rear direction is reinforced by a connecting plate 22 or the like to form a frame. The front axle frame 23 is shaped like a
A front wheel differential device 25 is swingably supported around a center pin 26 via a pair of front and rear brackets 24 on the lower side of 23, and a steering arm 27 is provided, while on the upper side of the front axle frame 23. A radiator 28, a battery 29, etc. are provided, and these are equipped with the engine 4 and
Is covered with.

The radiator 28 is the front PT of the engine 4.
The radiator fan is driven by the O-axis 31 by the winding transmission body 32, and the radiator 28 is supported by the bracket 33 in a vibration-proof manner. A thick-walled steel pipe 34 extending in the front-rear direction is fixed to the upper edge (upper side) of the pair of left and right plate-shaped frames 7 in the front axle frame 23 by welding or the like. The front end is connected to the pump 36 via the left and right joints 35, and the rear end is connected to the flexible inlet and delivery hose 38 via the joint block 37.

Joint 35 in thick-walled steel pipe 34 on the inlet side
Is connected to the suction side 36A of the pump 36, and surrounds the straight pipe 39 inserted into the hole 7A formed in the plate-shaped frame 7 and the through hole 39A radially formed at one end of the straight pipe 39. Hollow block fixed to the plate surface of plate frame 7 by welding, etc.
40 holes, screw holes formed in the hollow block 40
It is assembled by inserting the straight pipe 39 from 40A into the hole 7A, connecting the straight pipe 39 to the suction side 36A of the pump 36, and screwing a screw plug 41 into the screw hole 40A.

The thick block steel pipe 34 is connected to the hollow block 40, and the straight pipe 39 is sealed with the hollow block 40 by a seal member 42. The joint 35 of the thick-walled steel pipe 34 on the delivery side is connected to the discharge side 36B of the pump 36 and is composed of a curved pipe 43 inserted into a hole 7B formed in the plate-shaped frame 7, and one end of the curved pipe 43 is eaten. Lock nut 43B to be fixed after connecting to discharge side 36B by means of plug joint 43A
The other end is fitted into and fixed to the thick-walled steel pipe 34, and some misalignment can be corrected by the flexibility of the bite joint 43A and the curved pipe 43 itself.

The pump 36 is, for example, a gear pump or a trochoid pump, and has a flexible joint 44 on the PTO shaft 31 of the engine 4.
They are connected by a transmission shaft 44 having A and 44B, and are mounted and fixed on the connecting plate 22 and the like via a pump mounting base 45.
Therefore, when the engine 4 is started, the pump 36 is driven, and as shown in FIG.
The gear lubricating oil inside is sucked by a filter (not shown), sent as shown by arrows A and B, sent to a control valve (not shown), and the lift cylinder 14 of the front loader 12 and the cylinder 20 of the backhoe 17 are operated. It is supposed to do.

[0016]

As described in detail above, according to the present invention, a thick steel pipe serving as an oil passage extending forward and backward along the longitudinal direction is fixed to a pair of left and right plate frames of the front axle frame. Since the thick-walled steel pipe can improve the rigidity of the front axle frame, the front axle does not require a separate reinforcing member such as a flat bar, which simplifies the structure and reduces the cost.

The thick-walled steel pipe is on the upper side of the plate-shaped frame,
Since it is stretched back and forth along this longitudinal direction,
The piping process is clean, maintenance is good, and there is little risk of interference with the front wheels. Furthermore, since the antecedent between the thick-walled steels is connected to the pump through the joint and the posterior example is connected to the flexible hose, it is possible to cope with the increase in hydraulic capacity.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view showing a partial cross section of an embodiment of the present invention.

FIG. 3 is an overall side view of a tractor to which the present invention is applied.

[Explanation of symbols]

 4 Engine 6 Tractor body 7 Plate frame 9 Front axle 34 Thick steel pipe 35 Joint 36 Pump 38 Flexible pipe

Claims (1)

[Claims] 1. An engine constituting a tractor vehicle body (6)
A pair of left and right plate-shaped frames (7) are fixed to the right and left side surfaces of (4) so as to project forward from the engine (4) and at the front of the engine (4) and below the plate-shaped frame (7). In the front axle frame (23) of the tractor in which the front axle (9) is mounted on the upper side of the pair of left and right plate-like frames (7),
A pump driven by the engine (4) via a joint (35) at the front end portion of the thick-walled steel pipe (34), to which a thick-walled steel pipe (34) extending back and forth along the longitudinal direction of (7) is fixed. (36) is provided and thick steel pipe
A front axle frame of a tractor, wherein a flexible pipe (38) for suction and delivery is connected to a rear portion of the (34).