JP2003200704A - Wheel suspension device of moving vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel suspension device capable of keeping the front/rear balance excellently when a work machine is mounted on the rear part of a vehicle body without deteriorating the appearance. <P>SOLUTION: In the moving vehicle, a front wheel deflection mechanism 30 is mounted in the inside at the center of an axle housing 2F, and the rotation motive power taken out of a transmission 15 mounted inside a transmission housing 13 is transmitted to the front wheel deflection mechanism 30 via a transmission shaft 31. The moving vehicle has axles 4F and 4F for driving front wheels 3F and 3F on the left and right sides of the front wheel deflection mechanism 30, and weights 6 and 6 are mounted on the axles 4F and 4F with an interval in-between. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a wheel supporting device that covers an axle of a moving vehicle such as a construction machine, a transportation vehicle, and an agricultural work machine. 2. Description of the Related Art Conventionally, an axle case is provided at a front portion of a vehicle body so as to protrude in the left-right direction, an axle for driving wheels is inserted through the axle case, and a gear case is inserted into a left-right protruding end of the axle case. There were moving vehicles that mounted wheels through. For example, an agricultural tractor is provided with a bracket on which an engine is mounted on a front portion, and an axle case projecting left and right is provided below the engine so as to be swingable up and down, and an axle for driving a front wheel is inserted through the case. At the same time, a front wheel is attached to a protruding end of the axle case via a gear case. The axle case or the gear case is filled with lubricating oil in order to operate the internal gear parts smoothly. [0003] In the moving vehicle of the prior art, work is performed by mounting work machines having different weights according to the types of work. Therefore, it is necessary to maintain the vehicle body satisfactorily. Therefore, a weight is detachably attached to a front portion of the vehicle body to secure the stability of the vehicle body. However, if the weight is configured to be detachable, attaching and detaching the weight requires a great deal of labor.If the weight is fixed to a part of the vehicle body, for example, a bumper, a strong support member is required, Affected or subject to various restrictions from legal regulations. [0004] In order to solve the above problems, the present invention takes the following technical means.
That is, the front wheel differential mechanism 30 is provided inside the center of the axle case 2F, and the rotational power extracted from the transmission 15 provided in the transmission case 13 is transmitted to the front wheel differential mechanism 30 via the transmission shaft 31. In a moving vehicle, axles 4F, 4F for driving front wheels 3F, 3F are provided on the left and right of the front wheel differential mechanism 30, and weights 6, 6 are provided on the axles 4F, 4F at intervals. This was used as a wheel supporting device for a moving vehicle. As described above, according to the present invention, since the weights 6, 6 for increasing the front wheel load are provided in the axle case 2,
The weight does not greatly protrude to the front of the fuselage as in the prior art, and does not impair the aesthetic appearance or receive any legal restrictions. Further, the front-rear balance when the working machine is mounted on the rear of the machine body is also maintained well, and the stability of the vehicle body can be sufficiently secured. Next, a case of an agricultural tractor (hereinafter referred to as a tractor) will be described as an example of a moving vehicle. The tractor 10 is provided with a bracket 9 at the front of the vehicle body, and an engine 11 at the upper portion of the bracket 9, and integrally connects the clutch housing 12, the transmission case 13, the rear transmission case 14 and the like from the engine 11 in the vehicle longitudinal direction. It is the main body of the rigid body. The transmission case 13 is made of, for example, a heavy material made of a casting, and a transmission 15 of a tractor is provided inside the transmission case 13.
The rotation power from the first wheel 3 is appropriately decelerated by the transmission 15 so that the front wheels 3
F or to the rear wheel 3R. Below the front part of the transmission case 13, a front wheel axle case 2F provided in the vehicle body left and right direction and a front wheel gear case 5F at the front end of the axle case 2F are provided as wheel suspension devices. . The front wheel 3F is provided on this. Also, a rear wheel 3R is provided at both left and right ends of the rear axle housing 14.
Is provided. The periphery of the engine 11 is covered with a bonnet 17, and behind the bonnet 17, a steering section including a steering 18, a seat 19, a shift lever 20, and the like is configured. The configuration of the hydraulic elevating system of the tractor 10 will be described. A cylinder case 21 is provided on the rear upper surface of the rear transmission case 14, and the hydraulic piston 22 in the cylinder case 21 is expanded and contracted to move left and right. The supported lift arms 23 are vertically rotated. Also, rear transmission case 1
4 has a top link 24 and left and right lower links 25
A three-point link mechanism consisting of 25 is provided, and various work machines are connected to the three-point link mechanism. In FIG. 3, the rotary work machine 1 is connected to the rear part of the vehicle body. The axle case 2F for the front wheels is made of a cast heavy material like the transmission case 13;
It is provided below the bracket 9 to be able to swing left and right. A front wheel differential mechanism 30 is provided inside the center of the axle case 2F, and transmits rotational power taken out of the transmission 15 to the front wheel differential mechanism 30 via a transmission shaft 31. An axle 4F for driving a front wheel 3F is provided from the left and right sides of the front wheel differential mechanism 30 so as to pass through a hollow portion of the axle case 2F. Bevel gears 32 are attached to the left and right end portions of the axle 4F so as to protrude from the axle case 2F,
The periphery of the bevel gear 32 is covered with a front wheel gear case 5F attached to the protruding end of the axle case 2F. An oil supply port 34 for filling lubricating oil is provided at an upper portion of the front wheel axle case 2F. A thick portion 6 serving as a weight is provided inside the axle case 2F in a state close to the axle 4F. As a result, the weight of the axle case itself is increased as compared with the conventional axle case for front wheels. As shown in FIG. 2, the cross-sectional shape of the axle case 2F is such that a groove-shaped oil passage 7 is provided at a lower portion of the thick portion 6 and a groove-shaped air passage 33 is provided at an upper portion. Thereby, the lubricating oil can be filled into the front wheel gear case 5F described later without delay. The front wheel gear case 5F is attached to the left and right ends of the axle case 2F so as to be open downward and slightly outward from the front. A relay shaft 35 is provided therein. , An upper bevel gear 36 and a lower bevel gear 37 are provided. The bevel gear 32 at the tip end of the axle 4F meshes with the upper bevel gear 36, and the lower bevel gear 37 meshes with the front wheel bevel gear 38 provided integrally with the front wheel 3F. It is configured to transmit to 3F and drive. Oil passage 7
Is provided in communication with the gear case 5F at a contact surface between the gear case 5F and the axle case 2F. Therefore, the lubricating oil supplied from the oil supply port 34 passes through the oil passage 7, falls into the gear case 5F, and is charged into the gear case 5F and the front wheel axle case 2F. As described above, the provision of the thick portion 6 on the front wheel axle case 2F of the tractor 10 has the same effect as providing the weight at the front of the vehicle body, and a heavy load is applied to the rear portion of the vehicle body. Even in this case, the front-rear balance of the vehicle body can be ensured. In addition, by providing the thick portion 6 inside the axle case 2F and providing the oil passage 7 and the air passage 33 in the thick portion 6, when the lubricating oil is filled, the internal air is pushed out to the air passage 33. Thus, the lubricating oil can be filled into the gear case 5F and the axle case 2F without delay. As another embodiment of the present invention, an intermediate axle case 2N is provided between an axle case 2F and a gear case 5F as shown in FIG.
The thick portion 6 is formed only on the inner wall of the slab. As a result, tread adjustment and weight adjustment can be performed simultaneously using the existing axle case 2F. As shown in FIG. 5, the axle 4F is formed in a tubular shape, and an insertion hole 40 is opened in a part of the axle 4F.
May be configured such that lubricating oil or air can be inserted into the gear case 5F through the inside 41 of the tube. As a result, the lubricating oil can be filled more quickly in the axle 4F than in the conventional solid axle. In the claims, the reference numerals corresponding to the configuration of the embodiment are attached, but the present invention is not limited to the configuration by the reference numeral.

[Brief description of the drawings] FIG. 1 is an overall left-right cross-sectional view of a front wheel axle case. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is an overall side view of the tractor. FIG. 4 is another embodiment of FIG. 1 provided with an intermediate axle case. FIG. 5 is another embodiment of FIG. 1 when the axle is formed in a tubular shape. FIG. 6 is a side sectional view of a front wheel differential device of the axle case. [Explanation of symbols] 1 Working unit 2 axle case 2F Front wheel axle case 2N intermediate axle case 3 wheels 3F front wheel 3R rear wheel 4 axles 5 Gear case 6 Thick part 7 Oilway 10 Tractor 33 Airway

Claims (1)

1. A front wheel differential mechanism 30 is provided in the center of an axle case 2F, and rotational power taken out of a transmission 15 provided in a transmission case 13 is transmitted through a transmission shaft 31 to the front wheel differential mechanism. In a mobile vehicle configured to transmit the force to the mechanism 30, the front wheels 3F, 3F
Are provided, and the axles 4F, 4F
A weight support device for a mobile vehicle, wherein weights 6 and 6 are provided at intervals on the vehicle.