JPH0548083Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a moving section in a working vehicle, and more particularly to a device for detecting the elevation position of a pre-processing section in a combine harvester.

Conventionally, this type of detection device consists of a fixed part such as a signal converter and a movable part such as a displacement detector. It was installed. Therefore, if the pre-processing section has been disassembled or adjusted, it is necessary to readjust both the fixed and movable parts of the detection device using a measuring instrument such as a tester or multimeter when reassembling it. It was very troublesome.

Therefore, the present invention uses a pre-treatment lifting link device.
A moving part detection device in a working vehicle that eliminates the above-mentioned drawbacks by constructing a separate block for the swing support frame of the pre-processing part and installing a moving part detection device in the pre-processing lifting link device. The purpose is to provide a device.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine 1 has a main machine 3 supported by a crawler 2, and a preprocessing section 5 is disposed in front of the main machine 3. The preprocessing section 5 has a frame 5a made of a transmission shaft case, and the frame 5a is pivotally supported on a shaft 6 disposed on a support frame 3a fixed to the front of the machine 3. At the same time, power is transmitted from the shaft 6. Further, as shown in detail in FIGS. 2 and 3, the support frame 3a has a first frame body made of two frames 9, 9 supported in parallel by a support shaft
A link 10 is pivotally supported, and a second link 12 made of a pipe is pivotally supported by a support shaft 11 at the tips of these frames 9, 9, and the tip of the second link 12 is fixed to the preprocessing section frame 5a. The second link 12 and the main unit 3 are connected to the connecting rod 13 provided in the
A hydraulic cylinder 15 is interposed and connected between the two, and these constitute a pre-processing section elevating link device A.

A moving part detection device B is attached to the link device A. That is, a plate 16 is spanned between the two frames 9, 9 forming the first link 10, and a signal converter 17 made of a differential transformer or the like is installed and fixed on the plate 16. ,
Further, a pre-processing section displacement detector 19 is fixed to the support shaft 11 fixed to the second link 12, and the length between the detector 19 and the arm 17a of the signal converter 17 can be adjusted. Transmission body 20 made of rods
are interposed and connected.

In addition, in FIG. 1, 21 is a grain transfer device, 22 is a gear case, and the moving part detection device B is installed above the line L, which is not clearly visible from the side of the aircraft.
Moreover, it is located considerably above the ground G, and is further wrapped tightly in a space surrounded by the grain culm conveying device 21, the gear case 22, the support frame 3a, the self-detachable side plate, etc.

Since this embodiment has the above-described configuration, in order to raise and lower the pretreatment section 5, the hydraulic cylinder 1 is
5 swings the elevating link device A, thereby swinging the preprocessing section frame 5a about the support shaft 6 via the connecting rod 13. As the pretreatment 5 moves up and down, the spindle 11 rotates relative to the first link 10 of the link device A, and the amount of rotation is detected by the detector 19,
The signal is further transmitted to the signal converter 17 via the transmitting body 20 and the arm 17a, further converted into an electrical signal by the converter, and sent through wiring to an output section located at another location for predetermined control. Let's do it.

As explained above, according to the present invention, the pre-processing lifting link device A is configured as a separate block from the swinging support frame 5a of the pre-processing section 5, and the pre-processing lifting link device A has the following functions: Since the moving part detection device B consisting of the displacement detector 19, the transmitter 20, and the signal converter 17 is installed, once it is adjusted during assembly, the structural parts such as the preprocessing part 5 can be dismantled, repaired, or adjusted. Even if the work is carried out, there is no need to readjust the detection device B unless the same block such as the link device A is disassembled, and maintenance becomes very easy. In particular, since the moving part detection device B is installed in the pre-processing part elevating link device A of the combine 1, the link device A
Adjustment is made using the shortest point of the hydraulic cylinder 15 as the origin, and adjustment is possible only with the link device A. Adjustment can be made regardless of whether the pre-processing section 5 is attached or removed. Since it is installed in a position that cannot be seen unless you look at it from below, and is installed well above the ground, there is no need for a cover, etc., and there is no dirt etc. thrown up from the crawler 2 etc., and furthermore, when making adjustments, it is possible to do so from below. Adjustment can be easily made by rotating the transmission body 20 with your hands. In addition, the resolution of the signal converter 17 such as a differential transformer decreases when its amplification amount is increased, and the amplification in the links 19, 17a, etc. is limited by the amount of elevation of the preprocessing section. The connection point 11 of the link is arranged below the swing fulcrum 6 of the preprocessing section 5, so that the displacement angle formed by both links 10 and 12 is expanded with respect to the support swing angle of the preprocessing section. Therefore, the signal converter 17 can be detected with high resolution based on the enlarged displacement input, and the vertical position of the preprocessing section 5 can be detected with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a preprocessing section of a combine harvester to which the present invention is applied, FIG. 2 is a side view showing a lifting link device portion of the preprocessing section, and FIG. 3 is a perspective view thereof. 1... Combine harvester, 5... Pre-processing section, 10...
1st link, 12...Second link, 15...Hydraulic cylinder, 17...Signal converter, 19...Displacement detection body, 20...Transmission body, A...Pre-processing section elevating link device, B... Moving part detection device.

Claims (1)

[Claims for Utility Model Registration] In addition to supporting the pre-processing section in this machine in a swingable manner,
In a combine in which the pre-processing section is raised and lowered by a hydraulic cylinder, a first link is provided between the main unit and the pre-processing section, one end of which is connected to the main machine, and one end of which is connected to the pre-processing section. a pre-processing section elevating link device comprising a second link and the hydraulic cylinder and connecting the other ends of the first and second links to each other; and one of the first and second links. A signal converter is fixed to one side, and a displacement detector is fixed to the other, and the signal converter and the displacement detector are connected by a transmitting body, and the connecting point of the first and second links is A preprocessing part elevation position detecting device for a combine harvester, the device being arranged below the swinging fulcrum of the preprocessing part so that the displacement angle formed by these two links is expanded relative to the support swing angle of the preprocessing part. .