JPH048073Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a crawler-type combine harvester in which a plurality of wheels for guiding the ground-contacting side portion of the crawler are arranged in parallel in the front-rear direction.

[Conventional technology]

In this type of combine harvester, it is necessary to move over areas with considerable height differences, such as from ridge to field or from field to ridge, and to cross ridges. In that case, if the wheels that guide the ground contact side of the crawler are all fixed, the moment the center of gravity of the vehicle crosses the step, the vehicle will tilt, causing momentary pitching, which is quite dangerous. .

Therefore, in order to prevent this kind of danger, some of the wheels that guide the ground-contacting side of the crawler, which are located in the middle in the longitudinal direction, are
It is known that the crawler is configured to be able to move up and down with respect to the vehicle body, and is attached to the vehicle body in a state where it is biased in a downward direction, so that the intermediate portion of the crawler in the longitudinal direction can be raised upward (for example, , Utsukai Showa 58-
Publication No. 186981).

[Problem that the invention attempts to solve]

According to this conventionally known method, the middle part of the crawler rises upward when passing a step, and the relative height of the vehicle body to the step becomes lower, so that instantaneous pitching of the vehicle body can be avoided to some extent. . However, since the center of gravity of the vehicle body was located approximately at the center of the crawler's ascendable range in the longitudinal direction, the distance from the front or rear end of the crawler's ascendable range to the vehicle's center of gravity was somewhat long. The moment the center of gravity of the vehicle crossed the step, the vehicle tilted significantly, and although this had been alleviated somewhat, it was still not satisfactory.

The present invention aims to solve these conventional problems, and focuses on the fact that normally when passing through a step, the person often passes while moving forward, and effectively utilizes this characteristic of use. The present invention aims to provide a crawler-type combine harvester that can more safely pass through stepped portions.

[Means for solving problems]

In order to achieve the above object, the crawler type combine harvester according to the present invention moves some of the wheels that guide the ground-contacting side portion of the crawler, which are located in the middle in the longitudinal direction, toward the vehicle body. Can be raised and lowered freely,
The wheels are attached in a state where they are biased in a downward direction with respect to the vehicle body, and the wheels arranged in parallel on the front and rear sides of the group of wheels that can be raised and lowered cannot be raised or lowered with respect to the vehicle body. The vehicle body is fixed, and is configured such that only the intermediate portion of the crawler in the longitudinal direction can be raised upward, and the center of gravity of the vehicle body is located forward of the center in the longitudinal direction of the ascendable range of the crawler. do.

The functions and effects of this characteristic configuration are as follows.

[Effect]

In other words, the center of gravity of the vehicle body is located forward of the center in the longitudinal direction of the installation range of the wheels that can be raised and lowered and are installed between the front and rear wheels that are fixed to the vehicle body so that they cannot be raised or lowered. When entering a field or passing over a level difference, such as when going over a ridge, move forward while passing through the area. After the height of the vehicle body decreases in the installation range of the rollers, if the center of gravity located at the front side of the installation area of the rollers, which can be raised and lowered, is located ahead of the crawler's ground contact position, it will immediately pitch or move up and down. After the height of the vehicle body decreases within the installation range of the freely adjustable wheels, the relative height of the vehicle body gradually increases as the fixed rollers on the rear side of the crawler ride up, but before it becomes too high, the center of gravity will reach the step of the crawler. Since it is located ahead of the ground contact point, it is possible to avoid momentary large pitching. However, when passing over a step while reversing, it is impossible to avoid the occurrence of some large pitching, but considering that it is extremely rare to pass through a step while reversing during actual work, overall The safety of passing through steps is improved.

[Effect of idea]

Therefore, by simple modification, it has become possible to make passage over stepped portions safer than in the past.

〔Example〕

An example of the present invention will be described based on the drawings.
Figure 1 shows the entire culm input type combine harvester.
At the front of the vehicle body 1, a reel 2 for raking the planted grain culm backwards, a cutting blade 3 for cutting the stock base of the raked grain culm, an auger 4 for sending the harvested grain culm rearward, and an auger 4 are provided. Conveyor 5 that lifts and conveys grain culms from
A reaping section 6 is provided. Car body 1
Mounted on the top are a threshing device 7 for threshing grain culms from the reaping section 6, a swing sorting device 8, a tank 9 for storing grains, and the like.

The threshing device 7 consists of a handling barrel 10 and a concave 11 below it, and the processed material leaking through the concave 11 is transferred to the starting end side of the swinging sorting device 8 by a swinging rack plate 12. The waste straw from the threshing device 7 is passed through a beater 13 and a straw walker 1.
4 to the outside of the machine.

The swinging sorting device 8 includes a chaff sheave 15 and a grain sheave 16 that swing integrally, a sorting fan 17, and the like.
After the grains have been sorted by
Then, the second grains are collected in the second grain collecting section 19, and then the grains are stored in the tank 9, and the second grains are returned to the threshing device 7 again.

The vehicle body 1 is configured to be driven forward and backward by a crawler type traveling device 20, and this traveling device 20 has a drive wheel 21, a tension wheel 22, and
It is composed of a plurality of wheels 23a, 23b and a crawler 24 suspended over these, and the ground-contacting side portion of the crawler 24 is formed by the wheels 23a, 23b arranged in parallel in the front-rear direction. It is designed to guide you. These plurality of wheels 23
2 located between a and 23b in the front and back direction
The rolling wheels 23b are rotatably supported on the lower end of a substantially L-shaped swing arm 27 that is swingably supported on the frame 25 via a horizontal shaft 26. At the other ends of these swing arms 27, pins 28 are provided to protrude outward, and as shown in FIGS. The rollers 23b are pressed downward by a spring 29, and each wheel 23b is thereby elastically urged in a downward direction relative to the vehicle body 1. Therefore, when this combine harvester passes over a step, for example when going over a ridge, the two wheels 23b located in the middle of the plurality of wheels 23a, 23b rise upward and cross the step. It is possible to safely climb over a step at a low relative height. And two wheels 23b
Since the center of gravity B of the vehicle body 1 is located forward of the center in the longitudinal direction of the range A in which the crawler 24 can rise due to the existence of Since the tank 9 is located nearby, it is always possible to cross over safely regardless of the amount of grain in the tank 9. FIG. 2 shows the movement of such a combine harvester. In the case where the center of gravity B of the vehicle body 1 is located approximately at the center of the ascendable range A in the longitudinal direction, the locus of the tip of the reaping part 7 follows the chain double-dashed line P' As shown by the solid line P, the center of gravity B can be raised to a slightly higher position, but if the center of gravity B is located forward of the center of the range A in the longitudinal direction, the center of gravity B can be lowered even further to safely reach the stepped area, as shown by the solid line P. can be overcome.

[Brief explanation of the drawing]

The drawings show an embodiment of the crawler-type combine harvester according to the present invention, and FIG. 1 is a longitudinal side view showing the entire crawler-type combine harvester of the full-culm input type, and FIG. 2 is a schematic side view showing the movement of the crawler-type combine harvester. Third
The figure is a side view of the main part, and FIG. 4 is a longitudinal cross-sectional rear view of the main part. 1...Vehicle body, 23a, 23b...Rolling wheels, 24...
...Crawler, A... Crawler's possible climbing range, B
...The center of gravity of the vehicle.

Claims (1)

[Scope of utility model registration request] This is a crawler type combine harvester in which a plurality of wheels 23a, 23b are arranged in parallel in the front and back direction to guide the ground contact side portion of the crawler 24, and the wheels 23a, 23
Some of the wheels 2 located in the middle in the front and back direction among b
3b is installed in a state where it can be raised and lowered with respect to the vehicle body 1 and is biased in a downward direction with respect to the vehicle body 1, and on the front side and the rear side of the group of wheels 23b that can be raised and lowered. The parallel wheels 23a are fixed to the vehicle body 1 in such a way that they cannot be raised or lowered, and only the middle part of the crawler 24 in the longitudinal direction can be raised upward. A crawler type combine harvester in which the center of gravity B of the vehicle body 1 is located forward of the center in the direction.