JPS5837205Y2 - Grain culm sensing device in combine harvester - Google Patents

Description

[Detailed description of the invention] The present invention optimizes the positional relationship between the culms and the dividing plate even if the spacing between the adjacent culm rows changes, so that the dividing plate is located at the center of the adjacent culm rows. The object of this invention is to be able to easily adjust the position of the detection arm so that the culm can be harvested without damaging the culm.

If the position and angle of the culm sensing device installed at the lower front of the machine are always kept constant, if the spacing between the culm rows (hereinafter referred to as the row spacing) changes, the separation between the grass dividing plate and the culm row will change. There were disadvantages such as the spacing between the grass blades changing, the grass cutting board damaging the culms, and the detection by the detection arm becoming uncertain, resulting in uncut areas.

The present invention solves the above-mentioned drawbacks by making it possible to adjust the fulcrum position and length of the rotating rod that supports the detection arm that contacts the culm, thereby making the mounting angle of the detection arm variable.

Hereinafter, the shell culm sensing device of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a simplified side view of a combine harvester, in which a culm sensing device S is installed on a connecting shaft 1 protruding from the lower front of the combine main body.

The culm sensing device S has the bases of a front rotating rod 2 and a rear rotating rod 3 pivotally attached to a portion near the front end of a connecting shaft 1, and each rotating rod 2
, 3, the base end of a detection arm 40 that abuts parallel to the 12 rows of culms is pivotally attached to the free end of the sliding rod 5, which is provided so as to be slidable back and forth along the connecting shaft 1. It is connected to the base of the rotating rod 2.

The sliding rod 5 is biased rearward to urge both rotating rods 2 and 3 to rotate forward together, and the rear rotating rod 3 has a cylindrical body 9 on its base side and is movable. The rod 10 is configured to be removably inserted and fixed with a bolt 11, and its length can be adjusted. By moving the movable rod 10 in and out, the detection arm 4 is pivotally attached to the front rotating rod 2. The same effect can be obtained even if the front rotating rod 2 has the above structure, which can be rotated about the fulcrum and the mounting angle can be changed.

A projection 6 that operates a limit switch 7.8 is integrally provided on the sliding rod 5, and when the limit switch is activated, either the left or right clutch (not shown) is disconnected to change the direction of travel. .

The operation of the shell culm sensing device having the above structure is as follows.

When moving the combine along a culm row with a wide thread spacing, the moving rod 10 is pulled out from the cylinder 9 and the rear rotating rod 3 is extended, and the detection arm 4 is moved in the direction in which the rear end is separated from the connecting shaft 1. The culm 12 is rotated to ensure that it always comes into contact with the culm 12, and the position (hereinafter referred to as a dead zone) where the direction of movement is not corrected can be adjusted to a central position between adjacent culm rows.

If the spacing between the strips is narrow, the movable rod 1o may be pushed into the cylindrical body 9 in the opposite manner to the above to shorten the rear rotating rod 3.

In the above description, the length of the rear rotating rod 3 is adjustable, but instead of the rear rotating rod 3, the front rotating rod 2 may be adjustable in length. , 3 can be adjusted in length, the entire position of the detection arm 4 can also be changed.

In addition, instead of adjusting the length of the rotating rods 2 and 3 to change the angle of the detection arm, the mounting angle of the detection arm can be changed by making the base pivot of the rear rotating rod 3 movable and changing the fulcrum position. For example, as shown in FIG. 3, the base of the rotating rod 3 is movably and fixedly supported by a support 14 having a plurality of latching recesses 13.

Further, the above-mentioned fulcrum position may be at each pivot point of the rotating rods 2, 3, and the supporting body 14 is provided at the fulcrum, and the rotating rods 2, 3 are connected to each other.
Let the free end of No. 3 be latched.

In addition, instead of pivotally connecting the rotating rods 2 and 3 to the connecting shaft 1, they are pivotally connected to a sensor box 15 containing limit switches 1 and 8 and a cam plate for driving the limit switches 7.8. may be fixed to the front fixed part of the combine main body.

The culm sensing device of the present invention, which has the above-described configuration and function, can adjust the mounting position of the detection arm depending on the width of the row spacing.
Since the angle is variable, it is possible to optimally adjust the positional relationship between the culm and the dividing plate, and the dividing plate always runs in the center between the rows of culms, preventing damage to the culm or The practical effect is that the culm can be harvested without leaving any uncut residue.

In addition, since the direction of movement can be corrected while the detection arm is always in contact with the culm, only one detection arm is required, which not only simplifies the configuration and lowers the cost, but also allows for a single rod. It is also possible to accurately correct the direction of movement even when only a row of shell culms remains.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of the combine harvester. FIG. 2 is a plan view showing an embodiment of the culm sensing device of the present invention. FIG. 3 is a plan view showing an example of the same location. 1... Connection shaft, 2, 3... Rotating rod, 4
...Detection arm.

Claims (1)

[Scope of utility model registration request] A detection arm of a culm sensing device provided to protrude only in one direction at the front fixed portion of the combine main body is rotatably pivoted at its base to a connecting shaft to which a grass dividing plate is fixed, thereby forming a parallel link 1 It is pivotably attached to the tips of the pair of rotating rods, and the mounting position or length of one of the rotating rods can be adjusted, and the other rotating rod reciprocates following the rotation. A combine harvester, characterized in that a pair of limit switches are provided at predetermined fixed parts, with sliding rods arranged in series, and a pair of limit switches that are selectively actuated by the sliding of the sliding rods to disconnect one of the clutches. culm sensing device in.