JPH0372490B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a machine frame equipped with a threshing device and an engine and connected to a reaping pre-processing section, and a leg member that connects a track frame of a left and right crawler traveling device. This invention relates to a combine harvester in which a machine frame and a truck frame are pivotally connected to allow relative rolling and a rolling adjustment mechanism is interposed between a machine frame and a track frame.

[Conventional technology]

An example of an agricultural combine harvester having a rolling structure is disclosed in Japanese Utility Model Application Publication No. 18823/1983, in which the left and right track frames of a crawler traveling device are connected by two leg members, and the leg members and the machine are connected to each other by two leg members. The crawler traveling device is configured to be pivotally connected to the frame via a support shaft so that it can roll freely relative to the machine frame, but in such a structure, the power transmission for driving the crawler traveling device is The following problems arose regarding the system and structure.

[Problem that the invention seeks to solve]

Because the crawler traveling device rolls with respect to the machine frame, a structure or system that allows rolling interlocking is required in the power transmission system.As a solution to this, for example, civil engineering construction It is conceivable that hydraulic motors be installed independently to drive the left and right crawler traveling devices, and pressurized oil is supplied to these hydraulic motors via hydraulic hoses, as is often used in machines, but this would require independent hydraulic systems. Two routes are required, which increases costs.
Therefore, as a structure that can be implemented at a relatively low cost, for example, a structure may be considered in which a single hydraulic motor is used and the power of this hydraulic motor is distributed to the left and right crawler traveling devices via a transmission to drive them.

In this structure, the transmission must be connected across the left and right track frames of the crawler traveling device, but the connection structure is as shown in the plan view of Figure 6, where the transmission case 1
Axle case 18a, 1 extending from both left and right sides of 8
8a can be connected and fixed to the truck frames 7a, 7a, but due to strength issues, in order to make the axle cases 18a, 18a sufficiently able to withstand the weight of the transmission case 18 and other loads, the axle It was necessary to increase the outer diameter of the cases 18a, 18a to increase their strength. Increasing the outer diameter of the axle cases 18a, 18a will increase their weight, and when driving in wet fields, it is expected that the contact resistance of the axle cases 18a, 18a with mud will increase, resulting in an increase in direct load. Ru.
It is also possible to consider a structure in which the outer diameters of the axle cases 18a, 18a are left as normal and the transmission case 18 is connected to the truck frames 7a, 7a via other support members, but this inevitably results in the problem of complicating the structure of the truck frame. was occurring.

Here, an object of the present invention is to
Mission case 1 that has sufficient strength without increasing the outer diameter of a and 18a and with a simple structure
The objective is also to obtain a support structure for 8.

[Means for solving problems]

The features of the present invention are that, in the above-mentioned combine harvester, the transmission case installed between the left and right crawler traveling devices is connected to the front end of the support shaft provided at the rolling fulcrum, and the axle case is protruded from the left and right sides of the transmission case. is connected to the front part of the truck frame, and its functions and effects are as follows.

[Effect]

If the structure is as described above, the transmission case will be supported in three places: the front end of the supporting shaft for the rolling structure and the front of the left and right track frames via the axle case, so the mission case will have sufficient support. It is connected to the truck frame with strength and rigidity.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to obtain a structure in which the transmission case can be supported with sufficient strength on the truck frame without using a separate support member and without increasing the outer diameter of the axle case. It was done. In addition, with this structure, the rolling support shaft also serves as the transmission case support member.
The connection part with the transmission case also requires only slight modification for connection, making the structure advantageous in terms of cost.

〔Example〕

Hereinafter, an agricultural combine harvester which is an embodiment of the present invention will be described.

As shown in Fig. 4, a pre-harvesting processing unit 2, which lifts and reaps the planted grain culm, and transports the reaped grain culm in a horizontal position and transfers it to a feed chain (not shown); A threshing device 4 that threshes harvested grain culms transported by a chain using a handling cylinder (not shown) that is horizontally suspended so that it can be driven inside, and an engine that drives the devices and generates power for self-propulsion. 5
and a control section 6 are mounted on a machine frame 8 provided with crawler traveling devices 7, 7 to constitute an agricultural combine harvester.

To explain in detail the engine 5, the engine 5 is mounted on the right front frame 8 in the direction of movement of the aircraft, and as shown in FIG. covered. Cooling air is supplied to the radiator 12 from the sides of the engine grille 3 through the dustproof net 3a due to the absorption effect of the fan 11, but air inflow is blocked to some extent inside the lower half of the dustproof net 3a, which has a strong absorption effect. A punched steel plate 13 and a jammer plate 14 are provided to allow cooling air to uniformly flow in from the entire surface of the dustproof net 3a.

Next, the rolling structure of the aircraft and the support structure of the mission case 18 will be explained in detail.
As shown in Figures 2 and 3, the track frames 7a, 7 of the crawler traveling devices 7, 7 located on the left and right sides of the aircraft
a are connected by leg members 15, 15, and leg members 15, 1
5. The support shafts 16a and 16b provided at the center are fitted into the bracket 8a provided on the lower surface of the machine frame 8, and the machine frame 8 and the leg member 1 are fitted with the fuel tank 10 installed in the center.
Hydraulic cylinders 17, 17 are installed as a rolling adjustment mechanism between the machine frame 8 and the crawler traveling device 7, 15, and pressure oil is supplied from a pump (not shown) on the machine body. 7 can be rolled freely and the attitude of the machine frame 8 can be controlled.

The transmission case 18, which houses a transmission mechanism that changes the speed of the power from the engine 5 and transmits it to the crawler traveling devices 7, 7, is connected to the front end of the support shaft 16a of the leg member 15 at the front of the aircraft body and the bracket 19.
At the same time, axle cases 18a and 1 extend from both left and right sides of the transmission case 18.
8a is fixedly supported by support members 21, 21 which are fixed to the leg members 15, 15 and fixedly connected to the front parts of the truck frames 7a, 7a by the members 20, 20, and the mission case 18 is It is configured to roll with respect to the machine frame 8 integrally with the crawler traveling devices 7, 7.

Regarding the power transmission system, a hydraulic pump (not shown) is driven by the power of the engine 5,
Pressure oil is supplied via a hydraulic hose 23 to a hydraulic motor 22 directly fixed to the power input part of the transmission case 18, and the power of the hydraulic motor 22 is controlled to change speed by a transmission mechanism inside the transmission case 18, and the crawler travels. It drives the sprockets 7b, 7b of the devices 7, 7. By converting the power from the engine 5 into hydraulic pressure and transmitting it through the hydraulic hose 23 in this way, even if the crawler traveling devices 7, 7 roll against the machine frame 8, the power can be transmitted without difficulty.

[Another example]

In the embodiment, the axle cases 18a, 18a of the transmission case 18 are connected to the leg members 15, 15 and the truck frame 7 via the support members 21, 21.
a, 7a, but the truck frame 7
It is also possible to adopt a structure in which the front portions of a and 7a extend diagonally upward forward and are directly connected to the axle cases 18a and 18a.

Furthermore, if the rolling angle is relatively small, the power can be transmitted from the engine 5 to the transmission case 18 easily even if a belt-type transmission mechanism is used instead of hydraulic pressure.

[Brief explanation of drawings]

The drawings show an embodiment of the combine harvester according to the present invention, and FIG. 1 is a plan view of the front half of the machine frame and truck frame, FIG. 2 is a side view of the machine frame and truck frame, and FIG. 3 is a cross section taken along line A-A. 4 is an overall side view of the combine harvester, FIG. 5 is a vertical cross-sectional front view of the vicinity of the engine of the combine harvester, and FIG. 6 is a plan view showing the conventional structure. 2... pre-reaping processing section, 4... threshing device, 5...
Engine, 7... Crawler traveling device, 7a... Truck frame, 8... Machine frame, 15... Leg member,
17... Rolling adjustment mechanism, 18... Mission case, 18a... Axle case.

Claims (1)

[Claims] 1 A machine frame 8 on which a threshing device 4 and an engine 5 are mounted and to which a reaping pretreatment section 2 is connected, and track frames 7a, 7 of left and right crawler traveling devices 7, 7.
This is a combine harvester in which the leg members 15, 15 connecting the parts a are pivotally connected so as to allow relative rolling, and a rolling adjustment mechanism 17 is interposed between the machine frame 8 and the truck frame 7a. The transmission case 18 placed between the devices 7, 7 is attached to a support shaft 16 provided as a rolling support.
a The transmission case 1 is connected to the front end.
Axle cases 18a, 18a protruding from the left and right sides of 8
The combine harvester is connected to the front part of the truck frames 7a, 7a.