JPH078243Y2 - Front axle support for tractor - Google Patents

Description

The present invention relates to a front axle support device for a tractor.

2. Description of the Related Art Conventionally, as a front axle support device for a tractor, as shown in FIGS. 8 to 10, a device utilizing a front wheel support 2 fixed to a side surface of an engine 1 has been widely adopted. here,
The front wheel receiver 2 includes a pair of left and right side plates 3 and 4 that are in contact with the side surface of the engine 1, a bumper 5 that connects the side plates 3 and 4 at the tip portions of the side plates 3 and 4, and the side plates 3 and 4 are substantially the same. It is composed of a pair of front and rear connecting members 6 and 7 for connecting the side plates 3 and 4 to each other in the central portion. Both ends of the connecting members 6 and 7 are side plates.
It is welded to 3,4.

A pair of front and rear bearing holders 8 and 9 are fixed to the lower surfaces of the connecting members 6 and 7 by bolts 10, and a pivot shaft 11 having an axial center in the front-rear direction is formed by the bearing holders 8 and 9.
Is pivotally supported. A front axle 12 is integrally provided on the pivot shaft 11, and front wheels (not shown) are attached to both ends of the front axle 12.

The rear end portions of the side plates 3 and 4 are in contact with the left and right side surfaces of the engine 1, and are fixed to the side surface of the engine 1 by bolts 13. The connecting member 7 located rearward in relation to the wheel base and the like is arranged close to the engine 1.

Problems to be Solved by the Invention The side plates 3 and 4 of the front wheel receiver 2 are brought into contact with the side surfaces of the engine 1 and the bolts 13 are tightened, whereby the engine 1
The dimension of the inner surfaces of the side plates 3 and 4 is set to be slightly larger than the width dimension "A" of the engine 1. Therefore, when tightening the bolt 13,
A part of the tightening force is wasted in the action of compressing the connecting member 7 or deforming the side plates 3 and 4, and a sufficient tightening force between the engine 1 and the side plates 3 and 4 cannot be obtained. Therefore, in the front loader work or the like in which a large load is applied to the front axle 12, the bolt 13 is easily loosened, and the looseness of the bolt 13 is a cause of damage to the bolt 13 and the engine 1.

Further, since the vertical thickness of the connecting member 7 is large, the mounting position of the bearing holder 9 is downward, and the dimension "B" from the center of the crank shaft (not shown) of the engine 1 to the center of the pivot shaft 11 is It becomes large and becomes an obstacle when lowering the vehicle height of the tractor.

Means for Solving the Problems A front wheel receiver having a pair of left and right side plates that are in contact with both right and left side surfaces of an engine and are fastened and fixed to the engine by bolts is provided, and holds the pivot shaft of the front axle and the front wheel receiver. Is provided with a pair of front and rear bearing holders, at least the rear bearing holder located in the vicinity of the engine is located between the side plates, and is tightened and fixed to the side plates by bolts, and is attached to the lower end surface of the front wheel receiver. The receiving surface that abuts is formed on the rear bearing holder.

The engine is positioned between the side plates and fixed by bolts, and at least the rear bearing holder located on the engine side is positioned between the side plates and fixed by bolts. The tightening force of the bolts for tightening and fixing the bearing holder applies the tightening force of the bolts for tightening and fixing the engine, and the tightened and fixed state of the engine becomes stronger. Further, since the bearing surface of the bearing holder contacts the lower end surface of the front wheel bearing, the weight load on the engine side directly acts on the bearing holder, and the weight load acting on the fastening fixing portion between the belling holder and the side plate is reduced. .

Embodiment A first embodiment of the present invention will be described with reference to FIGS. The same parts as those described in FIGS. 8 to 10 are designated by the same reference numerals, and the description thereof will be omitted. A front wheel receiver 14 fixed to the side surface of the engine 1 is provided,
The front wheel receiver 14 is composed of a pair of left and right side plates 3 and 4 that come into contact with the side surface of the engine 1, a bumper 5, a connecting member 6, and a pair of left and right fixed side plates 15 and 16 that are part of the side plates. Has been done. The fixed side plates 15 and 16 are located below the tip of the engine 1 and are welded to the outer side surfaces of the side plates 3 and 4 to extend downward. The rear end portions of the side plates 3 and 4 are in contact with the left and right side surfaces of the engine 1, and are fixed to the side surface of the engine 1 by bolts 13.

Next, a bearing holder 17 is provided between the fixed side plates 15 and 16.
The left and right side surfaces of the bearing holder 17 are abutted against the inner side surfaces of the fixed side plates 15 and 16, and are fixed by bolts 18. The width dimension of the bearing holder 17 in the left-right direction is set to be slightly smaller (about 0.5 to 1 mm) than the outer width dimension "C" of the side plates 3 and 4. A recess is formed in the center of the upper surface of the bearing holder 17.
19 is formed, and the front end portion of the oil pan 20 fixed to the lower portion of the engine 1 is located in this recess 19.
Further, receiving surfaces 21 are formed so as to project upward at the left and right ends of the upper surface of the bearing holder 17, and these receiving surfaces 21 are in contact with the lower end surfaces 22 of the side plates 3 and 4. .

A bearing holder 8 is fixed to a bolt 10 on the lower surface of the connecting member 6 welded between the side plates 3 and 4, and the pivot shaft 11 of the front axle 12 is fixed by the bearing holder 8 and the bearing holder 17. Is supported.

In such a configuration, the engine 1 is arranged between the side plates 3 and 4 and fixed by tightening the bolts 13, and the fixed side plate 1
The bearing holder 17 is arranged between the 5 and 16 and tightened by the bolt 18. The tightening force of the bolt 18 and the tightening force of the bolt 13 both act in a direction to bring the side plates 3 and 4 closer to each other, and accordingly, the tightening force of the bolt 18 applies the tightening force of the bolt 13. Therefore, the tightened and fixed state of the engine 1 with the bolt 13 becomes strong. In addition, bearing holder
The error between the lateral width dimension of 17 and the outer width dimension “C” of the side plates 3 and 4 is absorbed by the bending of the side plates 3 and 4 and the fixed side plates 15 and 16 when the bolt 18 is tightened.

Next, since the receiving surface 21 of the bearing holder 17 is in contact with the lower end surfaces 22 of the side plates 3 and 4, the weight load on the engine 1 side directly acts on the bearing holder 17. Therefore, even when the tractor travels in an uneven field scene, a large weight load does not act on the tightening and fixing portion by the bolt 18, and damage to the bolt 18 is prevented.

In this embodiment, the rear bearing holder 17
Although only the fixed side plates 15 and 16 are fixed and fixed, the front bearing holder 8 may employ the same fixing means.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those described in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be omitted. A front wheel receiver 23 fixed to the side surface of the engine 1 is provided, and the front wheel receiver 23 includes a pair of left and right side plates 3 and 4 that are in contact with the side surface of the engine 1, a bumper 5, a connecting member 6, It is composed of a contact piece 24 which is a side plate fixed to the inner side surfaces of the side plates 3 and 4 by welding. The front bearing holder 8 is fixed to the lower surface of the connecting member 6 with bolts 10, and the rear bearing holder 25 is fixed to the side plate 3,
It is arranged between the four and is fastened and fixed by bolts 18. The mounting position of the bearing holder 25 is changed to the front of the engine 1. Further, the receiving surfaces 27 formed on the upper surfaces of the left and right ends of the bearing holder 25 are in contact with the lower end surface 26 of the contact piece 24.

Effect of the Invention As described above, according to the present invention, at least the engine side of the pair of front and rear bearing holders for holding the pivot shaft of the front axle is secured by abutting the side plates of the front wheel bearings on the left and right side surfaces of the engine and fixing them by bolts. Since the rear bearing holder located at is located between the side plates and is tightened and fixed with bolts, the tightening force of the bolt that tightens and fixes the bearing holder applies the tightening force of the bolt that fixes and fixes the engine. The mounting condition can be made strong, thus preventing the loosening of the bolts that fasten the engine in the front bearing and preventing the damage of the bolts and engine due to the loosening of these bolts. In addition, the bearing surface of the bearing holder is brought into contact with the lower end surface of the side plate to reduce the weight load on the engine side. Since it is directly received by the holder, even if the tractor vibrates greatly, it is possible to prevent the accidental damage to the mounting part of the bearing holder to the side plate.Furthermore, the connecting member for mounting the bearing holder as in the conventional example. Since it is not necessary to reduce the vehicle height of the tractor by a dimension corresponding to the thickness of the connecting member, the front wheel receiver does not require high dimensional accuracy, which reduces the cost in terms of dimensional accuracy. It has the effect of being able to

[Brief description of drawings]

FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a side view showing a part in section, and FIG. 2 is a sectional view taken along the line aa in FIG. FIG. 3 is a perspective view showing a front wheel receiver, FIG. 4 is a perspective view showing a rear bearing holder, FIGS. 5 to 7 show a second embodiment of the present invention, and FIG. FIG. 6 is a perspective view showing a rear bearing holder, and FIGS. 8 to 10 are conventional examples. FIG. 8 is a side view showing a partial cross section, FIG. 9 is a sectional view taken along line cc in FIG. 8, and FIG. 10 is a perspective view showing a front wheel receiver. 1 ... Engine, 3, 4 ... Side plate, 8 ... Bearing holder, 11
… Pivot axle, 12… Front axle, 13… Bolt, 14… Front wheel receiving, 15,16… Side plate, 17… Bearing holder, 18… Bolt, 21… Receiving surface, 22… Lower end surface, 23… Front wheel receiving, 24… Side plate, 25 ... Bearing holder, 26 ... Lower end surface, 27 ... Receiving surface

Claims (1)

[Scope of utility model registration request] 1. A front wheel receiver having a pair of left and right side plates that are in contact with both left and right side surfaces of an engine and are fastened and fixed to the engine by bolts. The front wheel receiver holds a pivot shaft of a front axle and is attached to the front wheel receiver. A pair of front and rear bearing holders, at least the rear bearing holder located near the engine is located between the side plates, and is fastened and fixed to the side plates by bolts, and is abutted against the lower end surface of the front wheel receiver. A front axle support device for a tractor, the surface of which is formed on the rear bearing holder.