JPH0444037Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a processing depth adjustment device for a threshing device, etc., and more specifically, a processing depth adjustment device that can be adjusted by swinging around a horizontal axis by human operating force. A rack rod for following the depth adjustment lever is installed along the swinging direction, and this rack rod engages with a pinion gear linked to the actuator that serves as the drive source when automatically controlling the depth adjustment device to enable automatic operation. The present invention relates to an operating structure of the constructed handling depth adjusting device.

[Prior Art] In the position adjustment structure of such a working device, an arc-shaped rack rod is attached to a handling depth adjustment lever at the center in the longitudinal direction, and when the lever is on a vertical line, the lengthwise direction of the rack rod is adjusted. It is set so that the center is at the highest position.

[Problem that the invention attempts to solve]

Normally, handling operations generate a large amount of floating dust due to the nature of the work, which may enter the interior of the machine through the guide groove of the handling depth adjustment lever and accumulate on the rack rod. Then, when they enter the interlocking part between the rack rod and pinion gear,
There was a problem that this caused frictional resistance, which hindered smooth operation during automatic control, and also caused accelerated wear of the occlusal part. In particular, when a rack rod is attached to the above-mentioned structure, the slope of the rack rod is gentle, and the dust accumulated on the rack rod is not only difficult to slide off, but also has a large surface area when viewed from above, so the amount of accumulated dust is large. This makes the above-mentioned problems even more likely to occur.

In view of these problems, the present invention aims to reduce the various harms caused by accumulated dust by rationally installing rack rods.

[Means for solving problems]

The characteristic configuration of the present invention, which has been made to achieve the above object, is that the rack lever is formed in an arc shape centered on the axis of the handling depth adjustment lever, and when the lever is at one stroke end, The rack rod is located at a point where the approximately central portion in the longitudinal direction is at the highest position.

[Effect]

In other words, according to the above configuration, conventionally, as the lever swung around the vertical line, the lever was tilted forward and downward in each direction of swiveling of the lever. By making sure that the longitudinal center of the rack rod is at its highest position when it reaches the end, by swinging the lever to the other stroke end, the rack rod can be moved deeper, albeit only in one direction. Lean forward downhill. Also, due to this deep slope, dust that would not previously slide down can now slide down.

[Effect of idea]

Therefore, according to the present invention, it is possible to promote the fall of the dust accumulated on the rack rod, and to prevent various adverse effects caused by the accumulated dust.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 6, a pre-processing section including a pulling device 1 and a reaping device 2 that act on the planted grain culm and a vertical conveyance device 3 that conveys the reaped grain culm to the rear of the machine is connected to a crawler traveling device 4, a threshing device A combine harvester is constructed by equipping the front part of a traveling aircraft having a section 5, a control section 6, etc.

As shown in FIG. 1, the vertical conveyance device 3 is composed of a clamping conveyance device 7 that acts on the stock side of the harvested grain culm and a locking conveyance device 8 that acts on the ear tip side. The structure is such that the grain culms are taken over in an upright position, lifted up and conveyed to the rear of the machine, changed to a sideways position at the end of the conveyance, and then fed to the starting end of the threshing feed chain 9. Then, the rear end side of the vertical conveyance device frame 10 is connected to the preprocessing section frame 11 so as to rotate around the axis P ₁ , and the front end side is connected to the preprocessing section frame 11 via the bending/extending link mechanism 12. They are connected to each other, and the clamping and conveying device 7 is configured to swing together with the locking and conveying device 8 in the direction of the grain culm to be conveyed around the axis _P1 on the conveyance end side. In other words, due to the above-mentioned rocking of the clamping and conveying device 7, the position at which the clamping and conveying device 7 clamps the harvested grain culm when it takes over changes toward the culm, and the grain is inserted into the handling chamber (not shown) in the threshing section 5. The treatment depth adjustment device is configured to change the culm height, that is, the treatment depth.

Pre-processing section frame 1 of the bending/extending link mechanism 12
An operating lever 13 for adjusting the handling depth for swinging the clamping and conveying device 7 is attached to the link 12a on the first side, and a rack rod 14 for following the lever 13 is fixed. This rack rod 14 has an arc shape centered on the operating lever axis _P2 , and is attached at the rear in a position along the swinging direction of the lever 13, so that the lever 13 is at the rear stroke end, i.e. When the lever 14 is at the rocking limit position A on the shallow handling side, the substantially longitudinal center of the lever 14 is at the highest position, and when the lever 13 is at its forward stroke end, that is, at the rocking limit position B on the deep handling side. As it transitions, it gradually slopes deeper and downward. As shown in FIGS. 3 and 4, a drive pinion gear 15 that engages the rack rod 14 from the lever axis _P2 direction is connected to an electric motor support member 16, a lever guide 17 that acts on the operating lever 13, and , is attached to the preprocessing unit frame 11 via a lever guide post 18, and is rotatably driven in a forward rotation direction and a reverse rotation direction by an electric motor 19, which is a type of actuator. That is, the electric motor 19 swings the operating lever 13 around the axis _P2 to automatically swing the clamping and conveying device 7.
When the operation lever 13 is swung around an axis P ₃ that is substantially orthogonal to the axis P ₂ , the rack rod 14 is configured to disengage from the pinion gear 15 and the rack rod 14 is disengaged from the pinion gear. The operating lever 13 is swing-biased by a spring 20 toward the side that engages with the gear 15, and the operating lever 13 is rotated around the axis _P2 while maintaining the operating lever 13 in a state in which the rack rod 14 is separated from the pinion gear 15. When the link 12a is swung, the link 12a is swung to switch to manual operation of the clamping and conveying device 7.

As shown in FIG. 5, a ventilation hole 27 is formed inside the partition wall covering the engine E of the combine harvester, and air introduced from the outside by an engine cooling fan 28 is passed between the engine room S and the threshing clutch lever 2.
9 and below the reaping clutch lever 30 and spray it near the rear lever gas rod 18,
Dust accumulated on the rack rod 14 is blown away when the operating lever 13 is at the rear stroke end A on the shallow handling side.

As shown in FIG. 2, a pair of oscillating first sensors 21a, 21b that contact and act on the grain culms transported by the vertical transport device 3 are arranged in parallel in the culm direction of the transported grain culms. In this state, the conveyance guide rod 8a of the locking conveyance device 8 is
It is attached to the support frame 23 of each grain culm holding rail of the clamping and conveying device 7, and is configured to detect the handling depth by detecting the position of the ear tip of the grain culm to be conveyed with respect to the clamping and conveying device 7. . That is, when only the first sensor 21a on the stock side of the pair of first sensors 21a, 21b comes into contact, the handling depth of the culm length from the clamping point to the tip of the stalk by the clamping and conveying device 7 falls within the set range. The pair of first sensors 21a, 2
If any of the first sensors 21a, 21b come into contact, the handling depth exceeds the set range, and the culm length is judged to be present. It is determined that the above-mentioned culm height is present when the culm becomes shallow beyond a set range.

A drive circuit for the electric motor 19 is connected to a first switch section 24a or 24b that electrically outputs the detection results of the pair of first sensors 21a and 21b, respectively, through a depth control mechanism (not shown). A second switch section 26 is connected to the handling depth control mechanism and electrically takes out the detection result of the second sensor 25 for detecting the presence of grain culms in the vertical conveyance device 3. The handling depth control mechanism automatically enters a state in which control operation is possible when the second sensor 25 is in the detection state.
In addition, the driving circuit automatically performs a predetermined operation based on the information from the pair of first sensors 21a and 21b so that the pair of first sensors 21a and 21b are in a state of detecting that the handling depth falls within the set range. The electric motor 19 is configured to be automatically controlled by outputting a signal.

In short, when the harvested grain culm is supplied to the vertical conveyance device 3, the handling depth can be automatically controlled, and the handling depth can be maintained almost constant regardless of changes in the culm height of the harvested grain culm. By switching the operating lever 13 to the disengaged state with respect to the electric motor 19 as necessary, the handling depth can be manually adjusted.

Incidentally, although numbers are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the operation structure of the handling depth adjustment device according to the present invention, FIG. 1 is a diagram showing a schematic configuration of the handling depth adjustment device, and FIG. 2 is a diagram showing a schematic configuration of the handling depth adjustment device, and FIG. Figure 3 shows the mounting structure, Figure 3 is a side view of the handling depth adjustment lever seen from the swinging direction, Figure 4 shows the engagement between the rack rod and pinion gear, and Figure 5 shows the application of the present invention. FIG. 6 is a longitudinal sectional front view showing the structure of the engine section of the combine harvester, and FIG. 6 is a front side view of the combine harvester. 3... Handling depth adjustment device, 13... Handling depth adjustment lever, 14... Rack rod, 15... Pinion gear, 19... Actuator, P ₂ ... Horizontal shaft center.

Claims (1)

[Scope of utility model registration request] A working depth adjustment lever 13, which can be swung around the horizontal axis _P2 by manual operation, is attached with a driven rack rod 14 along the swinging direction, and this rack rod 14 is used to adjust the handling depth. The operating structure of the handling depth adjusting device is configured to be automatically operable by engaging with a pinion gear 15 that is linked to an actuator 19 serving as a drive source during automatic control of the device 3, and in which the rack rod 14 is adjusted to the handling depth. The adjustment lever is formed in an arc shape centered on the axis _P2 , and the lever 1
3 is at one stroke end, the substantially longitudinal center of the arcuate rack rod 14 is at the highest position.