JPH0338475A - Movable agricultural machine such as tractor or the like - Google Patents

Abstract

PURPOSE:To restrain vibration to a machine body frame to ensure stable running condition by making a transmission case by integral with a front axle case to form a running drive structure, and fixing the structure to a machine body frame in a vibration-proofing state. CONSTITUTION:The vibration of an engine 8 is transmitted to a transmission case 13 fixed in the rear thereof and a front axle case 11 connected by connecting members 9a - 9b fixed to the lower portion of the engine. As the transmission case 13 and the front axle case 11 are integrally fixed as a running drive structure 1 the vibration of the engine 8 is transmitted to the road surface through a front wheel 10 supported on the front axle case 11, so that the vibration of a machine body is restrained in co-operation with a vibration absorbing effect by vibration-proofing members 15, 17 to the machine body frame 2. The vertical vibration of the front wheel 10 due to the unevenness of the road surface transmitted to the machine body frame 2 is decreased by making the vibration of the front axle case 11 due to the unevenness the road surface and the vibration of the engine 8 interfere with each other to restrain the vibration of the running drive structure 14 itself.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mobile agricultural machine such as a tractor, and in particular, to transmitting vibrations caused by the engine drive and vibrations due to unevenness of the running road surface to the running machine during running. The present invention relates to a mobile agricultural machine such as a tractor, which can ensure safe and smooth running conditions of the mobile agricultural machine.

[Prior Art] Conventionally, mobile agricultural machines such as tractors are configured to have an engine mounted on a body frame via an elastic member in order to prevent resonance of the machine body during traveling.

However, with this model, the vibration of the engine becomes large when driving at low speeds, causing cracks in the piping joints of the hydraulic pump connected to the engine, or damage to the installation of peripheral equipment such as a radiator that is fixed to the fuselage frame. Not only does it have the disadvantage of causing the aircraft to become loose, but there is no countermeasure or countermeasure against vibrations caused by uneven road surfaces being transmitted to the aircraft frame while the aircraft is running, and the balance of the aircraft may change while the aircraft is running. In particular, when towing work equipment to the rear of the aircraft, the pitching of the aircraft body also spreads to the work equipment, making it impossible for the aircraft to run smoothly. It had some drawbacks.

[Problems to be Solved by the Present Invention] The present invention has been devised in view of the above-mentioned circumstances and to eliminate the drawbacks of the conventional technology. The axle case is integrated to form a traveling drive structure, and the traveling drive structure is fixed to the fuselage frame in a vibration-proof manner to transmit the vibrations of the engine body to the road surface via the front axle case and the traveling wheels. , it is possible to avoid vibration transmission to the aircraft frame, and also to suppress vibrations to the single aircraft frame by mutually interfering the vibrations of the front axle case caused by uneven road surfaces and vibrations caused by the rotational drive of the engine, resulting in a stable structure. The purpose of this invention is to provide a mobile agricultural machine such as a tractor that can maintain a stable running state.

[Means for solving the problem] In order to solve the problem, the technical means adopted by the present invention are as follows:
A traveling drive structure is constructed by integrating a transmission case disposed at the rear of the engine and a front axle case disposed below the engine, and the traveling drive structure is fixed to the fuselage frame in a vibration-proof manner. That is.

[Operation of the Invention] Therefore, according to the present invention, a stable aircraft running state can be ensured without transmitting vibrations of the engine body and vibrations from the road surface to the aircraft frame.

[Embodiment] The structure of the present invention will be explained in detail with respect to an embodiment shown in the drawings.

In FIG. 1, reference numeral 1 indicates the body of an agricultural tractor.
A driver's seat 7 equipped with a steering device 6 is provided behind the hood 3.

An engine 8 is disposed within the bonnet 3, and a connecting member 9 is fixed to the lower part of the engine 8. The connecting member 9 has a flat base 9a and a connecting portion 9b.
is erected, and support parts 9c and 9d are integrally molded on the back side of the base 9a to support a swing support shaft (not shown) of the front axle case 11 that supports the front wheel 10, The connecting portion 9b is fixed to the lower part of the engine 8 to integrate the engine 8 and the front axle case 11.
A rotatable front wheel drive shaft 12 is interlocked to the rear of the vehicle. Further, a mission case 3 housing a front transmission (not shown) is integrally fixed to the rear of the engine 8, and the mission case 13
The front wheel drive shaft 12 is fitted into the lower part of the
A traveling drive structure 14 is formed.

On the other hand, a horizontal frame 2a and a support frame 2b are fixed horizontally to the front and rear parts of the fuselage frame 2, respectively.

The vibration isolating member 15 formed in a cylindrical shape is fitted in the vertical swing state, and the base 9β of the connecting member 9 is maintained elastically supported on the horizontal frame 2a by the fixing bolt 16 inserted from above. It is screwed on.

Further, on the support frame 2b, a vibration isolating member 17 is inserted between the fixing part 13a of the mission case 13, and in order to maintain the mission case 13 in an elastic state, a fixing bolt (not shown) is inserted from below. It is inserted through and fixed to the support frame 2b.

At the rear of the mission case 13, a rear wheel drive shaft 18 is provided to transmit the rotational driving force of the engine 8 to a rear transmission mechanism (not shown) in the rear transmission case 5.
and the sub-drive shaft 19 are connected to the connecting links 20a and 20, respectively.
They are connected via b.

In the configuration as described above, when aircraft 1 is run,
Vibrations caused by the rotational drive of the engine 1 are transmitted to the mission case 13 fixed to the rear of the engine 1 and the front axle case 11 connected by a connecting member 9 fixed to the lower part of the engine 8. The case 11 is a traveling drive structure 1
4, the vibration of the engine 8 is transmitted through the front wheel 10 which is pivotally supported by the front axle case 11.
is transmitted to the road surface through the
vibrations will be suppressed.

Further, the vertical vibration of the front wheel 10 due to the unevenness of the road surface is transmitted as vibration to the engine 8 and the transmission case 13 via the front axle case 11. The vibrations caused by the active rotation of the engine 8 interfere with each other, suppressing the vibrations of the traveling drive structure 14 itself, and the vibration damping effect of the vibration isolating members 15 and 17 reduces the transmission of vibrations to the fuselage frame 2. Unnecessary pitching of the aircraft 1 is suppressed.

[Effects of the Invention] In short, the present invention integrates a transmission case disposed at the rear of the engine and a front axle case disposed at the bottom of the engine to form an active running structure, and the active running structure is fixed to the fuselage frame in a vibration-proof manner, so the vibration of the engine body is transmitted to the road surface via the front axle case and the running wheels, avoiding transmission of vibration to the fuselage frame. The vibration of the front axle case caused by the engine can be canceled out by mutual interference with the vibration of the engine itself, thereby preventing the vibration of the traveling opening structure itself and creating a stable aircraft without pitching of the aircraft frame. The running condition can be ensured. This has an extremely useful novel effect.

[Brief explanation of drawings]

The drawings show an embodiment of a mobile agricultural machine such as a tractor according to the present invention, and FIG. 1 is an overall side view. In the diagram, 2... Aircraft frame L/- frame, 8... Engine, 11...
- Front axle case, 13... Mission case, 14... Travel active structure.

Claims (1)

[Claims] The transmission case disposed at the rear of the engine and the front axle case disposed at the bottom of the engine are integrated to form a travel drive structure, and the travel drive structure is fixed to the fuselage frame in a vibration-proof manner. Mobile agricultural machinery such as tractors.