JPS63173769A - Front axle housing supporting device for passenger tractor - Google Patents

Abstract

PURPOSE:To facilitate maintenance by allowing a front axle hausing to be separated from a chassis frame without demounting a pivot shaft. CONSTITUTION:Front and rear bearing parts 66 in pairs for extending the axis line in the longitudinal direction are formed integrally at the center part on the right and left sides of a bracket 64. A front axle housing 10 is supported in swingable ways in the vertical direction by a horizontal pivot shaft 67 whose both edges are supported by the bearing 66. The swing angle of the front axle housing 10 is regulated by the contact of a circular projection 68 bulging onto the upper surface of the housing with the undersurface of the bracket 64. When the front axle housing 10 is separated from a chassis frame 2, in order to carry out maintenance for said housing 10, said housing 10 is separated from the bracket 64 by demounting bolts 65.

Description

Detailed Description of the Invention A0 Object of the Invention (1) Industrial Application Field The present invention relates to a front axle housing support device for a riding tractor used for agricultural work, etc. The present invention relates to an improvement in a front axle housing support device that supports a front axle housing so as to be able to swing vertically via a pivot shaft.

(2) Prior Art Such a front axle housing support device is already known, as disclosed in, for example, Japanese Utility Model Publication No. 59-91923.

(3) Problems to be solved by the invention In the conventional front axle housing support device, both ends of the pivot shaft are supported directly on the vehicle body frame, so when the front axle housing is separated from the vehicle body frame for maintenance, The pivot shaft must be removed; doing so may risk damaging the pivot shaft or its bearing by hitting other objects or exposing it to dust.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a front axle housing support device for a passenger tractor, which allows the front axle housing to be separated from the vehicle body frame without removing the pivot shaft. shall be.

B1 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a front axle housing with a front 8I? The present invention is characterized in that a bracket connected via a pivot shaft is removably fixed to the vehicle body frame, and the pivot shaft and the engine oil pan are disposed close to each other within the vehicle body frame.

(2) Effects According to the above configuration, when the bracket is removed from the vehicle body, 1. !
'Together with this bracket, the front axle housing can be separated from the vehicle frame, so that there is no need to remove the pivot shaft for its separation.

On the other hand, when the bracket is attached to the vehicle body frame, the pivot shaft and the oil pan of the engine approach each other within the vehicle body frame, which lowers the center of gravity of the vehicle body frame and the engine, improving the stability of the tractor.

In addition, if the vehicle body frame is configured in a ladder type with a pair of left and right vertical frames, and a bracket is fixed to connect the two vertical frames, the bracket can also function as a cross member.
Contributes to strengthening the body frame.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, 1 indicates a riding type agricultural tractor, and on its body frame 2, from the front,
A battery 3, a radiator 4 and an engine 5 are installed,
A cooling fan 8 driven by a crankshaft 6 of the engine 5 via a transmission belt 7 is disposed between the radiator 4 and the engine 5 .

Further, a front axle housing 10 that pivotally supports a pair of front wheels 9 in a steerable manner is suspended below the engine 5 on the vehicle body frame 2 . This front axle housing 10 accommodates a differential device (not shown) for driving the front wheels 9.9.

Furthermore, a handle column (not shown) that supports the steering handle 1) is fixed to the vehicle body frame 2 immediately after the engine 5, and a transmission case 1 is attached to the rear end of the vehicle body frame 2.
2 is fixed. On both left and right sides of this mission case 12, an axle 14.1 driving a pair of rear wheels 13.13 is provided.
A rear axle housing 15.15 bearing 4 is fixed.

Inside the transmission case 12, from the front, there are clutch 1.
6. Differential device 1 connected to transmission 17 and axle 14.14
8 is accommodated, and the input shaft 19 of the clutch 16 and the first and second output shafts 20 and 21 of the transmission 17 protrude from the front of the transmission case 12, and the rear power take-off shaft 48
protrudes from the rear surface of the case 12.

A flywheel 22 attached to the rear end of the crankshaft 6 of the engine 5 is connected to the input shaft 19 via a drive shaft 23 and universal joints 24 and 25 at both ends thereof. Further, the first output shaft 20 is connected to the differential device in the front axle housing 10 via a drive shaft 26 and universal joints 27 and 28 at both ends thereof, and the second output shaft 21 is connected to the front of the vehicle body frame 2. It is connected to the protruding front power take-off shaft 29 via a drive shaft 30 and universal joints 43, 44 at both ends thereof.

When the engine 5 is in operation, its power is guided from the flywheel 22 to the transmission 17 via the clutch 16.
And from this transmission 17 the front and rear wheels 9,9i13.13
, or transmitted to the front and rear power take-off shafts 29.48.

A first steering gear box 31 is disposed immediately after the flywheel 22, and the steering handle 1) is connected to a first steering input shaft 33 extending from the upper surface of the gear box 31 via a universal joint 34. The first steering output shaft 35 extending from the front surface of the first steering gear box 31 is connected to the second steering input shaft 36 of the second steering gear box 32 disposed in front of the front axle housing 10. interlocking shaft 37 and universal joints 38 at both ends thereof.
．． 39, and the second
A focus unarm 41 fixed to the steering output shaft 40 is connected to a drag link (not shown) of the front wheel 9.9.

5 to 10, the vehicle body frame 2 includes a pair of left and right vertical frames 50 and 50 extending in the front and rear directions;
A first cross member 51 connects the front ends of both line frames 50, 50, and a second cross member 51 connects the two middle parts of both line frames 50, 50 to each other. The third cross members 52 and 53 form a ladder shape. The third cross member 53 has through holes 45 through which the three drive shafts 23, 26, 30 pass, respectively.
and notches 46, 47 are provided (see FIG. 9).

Each vertical frame 50 is formed in a cross-sectional channel shape with an open surface facing inward of the vehicle body frame 2 and a vertical width substantially constant over substantially the entire length, and strip-shaped projecting pieces 54. 55 extends vertically. Further, each vertical frame 50 has an outwardly protruding portion 50a at an intermediate portion in the longitudinal direction, and the first steering gear box 31 is disposed inside the protruding portion 50a of the left vertical frame 50, and A universal joint 30 of the front power take-off shaft 29 is installed inside the bulging portion 50a of the frame 50.
are arranged (see Figures 2 and 8).

Further, first and second reinforcing plates 56 and 57 are welded to each vertical frame 50. The first reinforcing plate 56 is attached to the vertical frame 50 in a range from approximately one-fourth of the front side of the length of the vertical frame 50 to the bulging portion 50a.
It is welded to the inner open end of the vertical frame 50 so as to form a closed cross-section structure together with the vertical frame 50.

The second reinforcing plate 57 is connected to the inner open end of the vertical frame 50 and the projecting piece 54, so as to form a closed cross-section structure together with the vertical frame 50 in the range from the bulge 50a to the rear end of the vertical frame 50. 55, and both reinforcing plates 56 and 57 are welded with their adjacent parts overlapping each other.

The second reinforcing plate 57 is formed to have a vertical width sufficiently larger than that of the vertical frame 50, and at both upper and lower ends thereof, a portion located slightly forward of the rear end extends in a direction perpendicular to the longitudinal direction of the vertical frame 50. A pair of upper and lower support portions 58.58 are provided that extend. The front end of the mission case 12 is inserted between the rear ends of both the left and right line frames 50.50, and the support parts 58, 58 of the left and right second reinforcing plates 57.57 are inserted.
The front shoulder portion 12a of the mission case 12 is brought into contact with the
Each support portion 58 and shoulder portion 12a are connected to each other by bolts 59, and a plurality of bolts 60 and
They are mutually bound by...

In this way, the transmission case 12 connects the rear ends of both line frames 50, 50, and functions as a strength member of the vehicle body frame 2.

Both ends of a bearing tube 61 are welded to the lower end of the brush 2 reinforcing plate 57, 57 so as to connect these to each other (the first
0), a brake pedal shaft (not shown) is rotatably supported by this bearing sleeve 61. Therefore, the bearing sleeve 61 also functions as a cross member.

Since both line frames 50, 50 of the vehicle body frame 2 have a substantially constant width in the vertical direction over the entire length and are channel-shaped, the production yield is high and can be obtained at a relatively low cost. Moreover, each vertical frame 50 has first and second reinforcing plates 56.5.
7, the middle part is stronger than the front part, and the rear part is stronger than the middle part, so each vertical frame 50 is given strength corresponding to the bending moment applied to it, resulting in a rational and lightweight vehicle body. Frame 2 is obtained.

Next, in FIGS. 1, 3, and 4, the engine 5 has elastic support members 62.6 on the upper surfaces of the left and right vertical frames 50, 50.
2, and the lower oil pan 63 is disposed between both box frames 50 and 50.

The bottom wall of the oil pan 63 has a shallow front half 63a and a deep rear half 63b, and a frame-shaped bracket 64 disposed as close as possible to the front half 63a has a plurality of bolts 65. 65, it is removably fixed to the lower surface of both line frames 50 and 50.

Bracket 64 is made of cast iron.

A pair of front and rear bearing portions 66.66 whose axis extends in the front-back direction are integrally formed in the left and right center portions of the bracket 64, and a horizontal pivot shaft 67 whose both ends are supported by these bearing portions 66.66 allows A front axle housing 10 is supported so as to be swingable in the vertical direction. The swing angle of the front axle housing 10 is regulated by circular protrusions 68, 68 raised on the upper surface of the housing abutting against the lower surface of the bracket 64.

Therefore, when separating the front axle housing 10 from the vehicle body frame 2 for maintenance, remove the bolts 65, 65, and remove the bracket 6.
Separate with 4.

By doing this, the pivot shaft 67 is attached to the bearing portion 66.6.
6 and front axle housing 10, and is not damaged by other objects or exposed to dust, etc., good pivot function can be ensured for a long period of time.

On the other hand, when the bracket 64 is attached to the vehicle body frame 2, the pivot shaft 67 is attached to the shallow front half 6 of the oil pan 63.
Since it is disposed close to the bottom of the frame 3a between the two line frames 50.degree. 50, the center of gravity of the body frame 2 and the engine 5 is lowered, thereby increasing the stability of the agricultural tractor 1. Moreover, the bracket 64 also plays the role of a cross member that connects both line frames 50, 50, and
Increase the strength of.

C1 Effects of the Invention As described above, according to the present invention, the bracket connected to the front axle housing via the pivot shaft is removably fixed to the vehicle body frame, and the pivot shaft and the engine oil pan are mounted within the vehicle body frame. Since they are located close to each other, once the brackets are removed from the body frame, the front axle housing can be separated from the body frame without removing the pivot axle, thus preventing the pivot and its bearing from being damaged by foreign objects. Good pivot function can be maintained for a long period of time without being exposed to dirt or dust.

Furthermore, when mounted on the vehicle body frame, the pivot shaft and engine oil pan are close to each other using the space within the vehicle body frame, which lowers the center of gravity of the vehicle body frame and engine, improving the stability of the tractor. Can be done.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of a riding type agricultural tractor, FIG. 2 is a plan view thereof, and FIG. Figure 4 is a view in the direction of the ■ arrow in Figure 3, Figure 5 is a plan view of the body frame of the agricultural tractor mentioned above,
Figure 6 is a sectional view taken along the line ■-■ in Figure 5, Figures 7, 8, 9, 10, and 1) are the cross-sectional views taken along
They are cross-sectional views taken along the lines (2), IX-IX, X-X, and XI-XI. 1... Agricultural tractor as a passenger tractor, 2...
Body frame, 5... Engine, 10... Front axle housing, 64... Bracket, 65...
・Bolt, 66... Bearing part, 67... Pivot shaft Fig. 7 Fig. 8 Fig. 9

Claims (3)

[Claims] (1) In a front axle housing support device for a passenger tractor, in which a front axle housing is vertically swingably supported via a pivot shaft at the lower part of a body frame with an engine mounted on the upper part, the front axle housing is attached to the pivot shaft. A front axle housing for a passenger tractor, characterized in that a bracket connected via a shaft is removably fixed to a vehicle body frame, and the pivot shaft and an engine oil pan are disposed close to each other within the vehicle body frame. Support device. (2) In what is stated in claim (1),
A front axle housing support device for a passenger tractor with a cast iron bracket. (3) In what is stated in claim (1),
The vehicle body frame is composed of a pair of left and right vertical frames and a plurality of cross members that interconnect them.Brackets are removably fixed to both vertical frames, and the oil pan and pivot shaft are mounted between the vertical frames. Front axle housing supports in a passenger tractor in close proximity to each other.