JPH0623234Y2 - Work device position adjustment structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is directed to, for example, the handling depth of a combine provided with an operation lever for manually adjusting the handling depth of a grain-culling sandwiching and conveying device in the conveying direction by artificial force. For details, regarding the control device, etc., in detail, a rack rod for following the operating lever for adjusting the working device, which can be swing-adjusted around the horizontal axis by an artificial operation force, is attached along the swing direction, and the rack rod is also attached. The present invention relates to a position adjusting structure of a working device configured to engage with a pinion gear that is interlocked with an actuator serving as a drive source during automatic position control of the working device so as to be automatically operated.

[Conventional technology]

In such a position adjusting structure of the working device, a rack rod is generally formed by an arcuate plate body, and a mounting position of the rack rod on the operation lever and a disposition position of the pinion gear are particularly determined. However, it was determined appropriately because of design considerations.

[Problems to be solved by the invention] However, it became clear that the following points should be taken into consideration depending on the mounting location and the location. That is, the farther the mounting position of the rack rod from the operating lever is to the position where the rack rod and the pinion gear are engaged, the more easily the rack rod is bent due to the occlusal reaction force, and the power transmission to the rack rod becomes unstable. Becomes, the limit value becomes smaller. Therefore, it has been necessary to increase the strength of the rack rod and strengthen the attachment position of the rack rod to the operation lever as the structure in which the distance between the attachment portion and the bite portion is longer.

The present invention pays attention to such a point, and by reasonably setting the mounting position of the rack rod to the operation lever and the disposing position of the pinion gear, various drawbacks due to the structural strength are minimized. Intended to improve.

[Means for solving problems]

The characteristic configuration of the present invention made to achieve the above object is that a rack rod is formed in an L-shaped cross-section, and its central portion in the longitudinal direction serves as a mounting portion for the operation lever, and the pinion gear is used for the operation lever. It is located on the bisector of the swing angle.

[Action]

In other words, according to the above configuration, no matter which stroke end the operating lever is swung, the distance between the mounting position of the rack rod on the operating lever and the engagement position of the rack rod and the pinion gear is approximately half the length of the rack rod. Can fit in. or,
Since the rack rod has an L-shaped cross section, the bent portion enhances the strength of the rack rod, and the rigidity against bending is increased even though the rack rod is a plate-shaped body.

[Effect of device]

Therefore, by synergizing these actions, the flexure due to the occlusal reaction force from the pinion gears of the rack rod is significantly reduced, and even if it is made of a relatively lightweight and thin material,
Stable power transmission can be performed.

〔Example〕

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

As shown in FIG. 6, a raising device for working the planted culms.
(1) and the mowing device (2) with the vertical transport device (3), which is an example of a working device for transporting the mowing culm to the rear of the machine, the crawler traveling device (4), the threshing part (5) ), And the front part of the traveling machine body having the control section (6), etc., to form a combine.

As shown in FIG. 1, the vertical transfer device (3) includes a pinching transfer device (7) that acts on the root side of the cut grain culm and a locking transfer device (8) that acts on the tip side, And the reaper (2)
The grain culm from the plant is taken up in a standing posture, lifted and conveyed to the rear of the machine, changed to a sideways posture at the conveying end portion, and supplied to the starting end portion of the threshing feed chain (9).
Then, the rear end side of the vertical transfer device frame (10) is connected to the pretreatment section frame (11) so as to rotate around the axis (P ₁ ), and the front end side is provided with a bending and stretching link mechanism (12). It is connected to the pre-treatment section frame (11) via the holding and conveying device (7) around the shaft core (P ₁ ) on the conveying end side.
Together with this, it is configured to swing in the direction of the culm of the transported grain culm. In other words, by the swinging of the nipping and conveying device (7), the nipping position when the nipping and conveying device (7) inherits the cut culm is changed in the culm direction, and the threshing section (5) is used in the handling room (Fig. The length of the culm that is inserted into (not shown), that is, the handling depth is changed.

An operation lever (13) for swinging the holding and conveying device (7) is attached to the link (12a) on the pretreatment frame (11) side of the bending and stretching link mechanism (12) and driven by the lever (13). The saddle (2) so that the rack rod (14) for use along the swinging direction of the lever (13) and the central portion in the longitudinal direction become the mounting point.
It is fixed using 6).

As shown in FIGS. 3 and 4, the rack rod (14) is
The long plate is formed by bending the cross-section into an L-shape and forming an arc shape as a whole, and its teeth (14a) are continuously formed along the end side of the rack rod (14). It projects in the same direction as the axis of the operating lever (13). Then, a drive pinion gear (15) that engages with the rack rod (14) from the lever shaft center (P ₂ ) direction, an electric motor support member (16), and a lever guide (13) that acts on the operation lever (13). 17) and via the lever guide column (18) to the pretreatment frame (11) so that it is located exactly on the bisector (l) of the swing angle (θ) of the operating lever (13). The electric motor (19), which is a type of actuator, is rotatably driven in the forward and reverse directions. That is,
The electric motor (19) is oscillated around the axis (P ₂ ) to automatically oscillate the sandwiching and conveying device (7).
The protrusion direction of the teeth (15a) of the pinion gear (15) is orthogonal to the protrusion direction of the rack rod (14) at the occlusal position, and the state can be confirmed from the lever guide groove (17a). . Then, set the operation lever (13) to the shaft core.
When swinging around the axis (P ₃ ) which is almost orthogonal to (P ₂ ),
The rack rod (14) is configured to disengage from the pinion gear (15), and the rack rod (14) is connected to the pinion gear (15).
The operating lever (13) is rockingly biased by the spring (20) to the side that engages with, and the operating lever (13) is maintained while the rack rod (14) is disengaged from the pinion gear (15). By swinging around the shaft core (P ₂ ), the link (12a) swings to switch to an artificial manual operation of the sandwiching and conveying device (7).

As shown in FIG. 2, a pair of oscillating first sensors (21a) and (21b) that make contact with the grain culm conveyed by the vertical conveying device (3) are connected to the grain direction of the conveyed grain culm. The locking and conveying device through one supporting member (22) in a state of being juxtaposed with each other.
(8) is attached to the support frame (23) of each of the transfer guide rod (8a) and the gripping and conveying device (7) for sandwiching and sandwiching rails, and the position of the tip of the transporting grain stalk relative to the sandwiching and conveying device (7) is set. The detection depth is configured to be detected. That is, when only the first sensor (21a) of the stocker side of the pair of the first sensors (21a) and (21b) comes into contact, the length of the culm from the pinching point by the pinching and conveying device (7) to the tip part However, when the pair of the first sensors (21a) and (21b) come into contact with each other, the culm length is deeper than the setting range of the handling depth. If the pair of the first sensors (21a) and (21b) are not in contact with each other, it is determined that the culm length is a shallow one that does not reach the setting range of the handling depth. I am doing it.

Then, the first switch section (24a or 24b) for electrically outputting the detection result of each of the pair of the first sensors (21a), (21b) is handled through a handling depth control mechanism (not shown). Second switch part (26) for electrically connecting the detection result of the second sensor (25) for detecting the presence of grain culm of the vertical transfer device (3), while electrically connecting to the drive circuit of the electric motor (19). )
Is linked to the handling depth control mechanism. And, the handling depth control mechanism is automatically set to a controllable state when the second sensor (25) is in the detection state, and
In the detection state that the handling depth is within the setting range, the pair of first
The electric motor (19) by automatically outputting a predetermined signal to the drive circuit based on the information from the pair of first sensors (21a) and (21b) so that the sensors (21a) and (21b) become
It is configured to automatically control. Furthermore, if the detection state of the second sensor (25) and the detection state or non-detection state of both the first sensors (21a) and (21b) continue due to the grain culm being too long or too short, or an error occurs. In the case of detection, when the electric motor (19) is continuously driven in only one direction and the operation lever (13) approaches the swing limit position,
As shown in FIG. 5, the limit switches (27), (27) mounted on the lever guide (17) detect it and stop further driving of the electric motor (19).

In short, when cutting grain culms are supplied to the vertical conveyor (3), the cutting depth can be automatically controlled, while keeping the cutting depth almost constant regardless of changes in the culm length of the cutting grain culms. The working depth can be artificially adjusted by switching the operation lever (13) to the occlusal release state with respect to the electric motor (19) so that the work can be performed.

It should be noted that although a number is given in the section of the scope of claims for utility model for convenience of comparison with the drawings, the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 shows an embodiment of a position adjusting structure of a working device according to the present invention, FIG. 1 is a diagram showing a schematic configuration of a working device and an operating lever, and FIG. 2 is a sensor for outputting a detection signal during automatic position control. FIG. 3 is a view showing a mounting structure, FIG. 3 is a side view of the operating lever viewed from a swinging direction, FIG. 4 is a view showing a state of engagement between a rack rod and a pinion gear, and FIG. 5 is a plan view of the operating lever. FIG. 6 is a front side view of a combine to which the present invention is applied. (3) …… Working device, (13) …… Operating lever, (14) …… Rack rod, (15) …… Pinion gear, (19) …… Actuator, (P ₂ ) …… Horizontal axis, ( l) …… bisector.

Claims (1)

[Scope of utility model registration request] 1. A rack rod (14) for driving is attached along a swinging direction by a control lever (13) for adjusting a working device, which is swingable around a horizontal axis (P ₂ ) by an artificial operation force. At the same time, the rack rod (14) is connected to the pinion gear (1) that is linked to the actuator (19) that is the drive source during automatic position control of the working device (3).
In the position adjusting structure of the working device which is configured to be engaged with 5) so as to be automatically operated, the rack rod (14) is formed into an L-shaped cross section, and its longitudinal center portion is connected to the operation lever (13). A structure for adjusting the position of the working device, which is used as a mounting point and in which the pinion gear (15) is positioned on the bisector (l) of the swing angle of the operation lever (13).