JPH0239813A - Sliding device in combine - Google Patents

Abstract

PURPOSE:To provide the title device so designed that female screw parts of a screw feed mechanism to transversely move a reaping part is engaged with only part of the surrounding of a screw axis, thereby diminishing the wear of the respective sliding parts of the screw axis and the female screw parts leading to improving their durability. CONSTITUTION:For such two engaged bodies 29' that on both sides of an engaged part 29a of approximately semi-arc-shaped section engaged with a spiral form 28b wound at a coarse pitch on a shaft form 28a of the screw axis 28 of a screw feed mechanism A to transversely move a reaping part, fitting parts 29b vertically raising to the screw axis 28 and having fitting faces on the identical plane, female screw parts 29 are screwed, with bolts 38 and nuts 39, to a stay projected from a tip-supporting case 16 and engaged with only part of the surrounding of the screw axis 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a slide device for a combine harvester in which a reaping section is attached to a traveling machine body equipped with a threshing device so as to be slidable laterally.

[Conventional technology]

The conventional slide device for the reaping section is disclosed in, for example, a patent application filed in 1983.
Like the one shown in No. 2-316867, a horizontally cantilevered screw shaft that is provided on the reaping part side and is rotationally driven,
The reaping section could be slid laterally with respect to the traveling machine body using a screw feeding mechanism by engaging a nut fixed to the support case on the traveling machine body side.

[Problem to be solved by the invention]

According to the above-mentioned prior art, when the screw shaft is driven to slide the reaping section with foreign matter such as mud and dirt attached to the screw shaft during reaping work, the pitch of the screw causes the screw shaft to slide into the nut. Due to the wedge effect that occurs due to the small penetration angle, mud and dirt can easily become clogged between the screw shaft and the nut, making it difficult to move or, in extreme cases, making it impossible to drive. Additionally, there was a problem in that both the screw shaft and the nut were prone to wear.

The present invention aims to eliminate such conventional problems.

[Means to solve the problem]

The slide device according to the present invention is characterized in that the female screw portion of the screw feed mechanism is configured to engage only in a portion around the screw shaft.

[For work] According to the above configuration, the female screw portion that engages with the screw shaft engages only in a part of the circumference of the screw shaft.
If a foreign object such as dirt or dust attached to the screw shaft becomes lodged in the female thread, during one rotation of the screw shaft, the foreign object will definitely be trapped in the open part where the screw shaft and the female thread are unengaged. The open portion provides an opportunity for foreign matter to be ejected. A sweeping action also occurs when the screw shaft and the female threaded portion are brought into and out of contact with each other. In other words, when the screw shaft goes under the female thread,
The foreign matter becomes larger in the direction approaching the open end edge of the female screw portion, and the foreign matter adhering to the screw shaft is scraped off by the open end edge and is prevented from entering.

〔Effect of the invention〕

Therefore, even if the screw shaft is rotated with dirt, dust, or other foreign matter attached to it, and foreign matter gets stuck between the screw shaft and the female thread, the foreign matter will be swept away by the female thread. Since the screw can be easily removed, it is possible to prevent the screw feeding mechanism from malfunctioning or being unable to move due to the jamming as much as possible. This also reduces wear on the screw shaft and the sliding parts of the female thread.
We were able to increase durability.

〔Example〕

As shown in Fig. 8, the combine harvester includes a pulling device (2) that pulls up the planted culms that have been divided by the weed cutting tool (1), and a reaping device (3) that reaps the culms after being pulled up. , left and right packers (4A) and conveyor bells with left and right protrusions (4B) as a merging conveyance device (4) that converges the harvested husks in the center of the cutting width, and a rear section equipped with a threshing feed chain (39) for concentrating the condensed husks. Consisting of a reaping pre-processing device consisting of a vertical conveyance device (6) etc. that conveys the grain toward the threshing device (5), and a driver's seat (7) disposed on the lateral side of the vertical conveyance device (6). has been done.

The above-mentioned weeding tool (1), pulling device (2), and reaping device (
3) The merging conveyance device (4) and the like will be collectively referred to as a reaping section (17), and the lateral sliding structure of this reaping section (17) with respect to the traveling body (9) will be explained.

As shown in FIGS. 9 and 3, a vertical frame (10) is erected at the front end of the traveling body (9), and a horizontal transmission case (11) is mounted on the upper end of this vertical frame (10). It is rotatably supported around a horizontal axis. A main frame (12) in a longitudinal orientation of the aircraft is fixed to the outer peripheral surface of the horizontal transmission case (11), and the transmission shaft (13) of the horizontal transmission case (11) and the main frame (1
2) is connected to the transmission shaft (14) by a bevel gear mechanism (15), and the power from the engine (not shown) is connected to the transverse transmission case (11) and the end of the transmission shaft (13) with a turntable (8). In response, it is configured to transmit power to a transmission shaft (14) within the main frame. A support case (16) is provided at the tip of the main frame (12), and this support case (16)
) is attached to the reaping section (17).

The mounting structure of the reaping part (17) in this tip support case (16) will be explained. As shown in FIGS. 9 and 3, the main frame (12) of the tip support case (16) is attached to a sliding shaft (18) that is aligned along the width direction of the aircraft with its own axis (X). The drive bevel gear (20) is fixed to the tip of the main frame transmission shaft (14), and the drive bevel gear (20) is fixed to the hexagonal intermediate portion. ) is formed. This passive bevel gear (19)
is fitted onto the hexagonal middle part of the sliding shaft (18) so that it can rotate integrally with the sliding shaft (18), and is rotatably supported by the tip support case (16) via a bearing (21). (18) The configuration allows for lateral sliding. The left and right ends of the sliding shaft (18) protruding left and right from the tip support case (16) are provided with a lifting device (2), (
2) a bevel gear transmission mechanism (22) that supplies power to the
(22) is provided.

A pipe-type first sliding frame (23) is pivotally supported on the front side of the sliding shaft (18) to be able to slide laterally on the tip support case (16) via bushes (24), (24). At the same time, left and right support frames (25) have left and right weeding tool support rods fixed to the left and right ends protruding from the tip support case (16).
), (25) are connected and fixed.

Moreover, further forward of the first sliding frame (23), a second sliding frame (26) is provided with a left and right support frame (25).
, (25), and is inserted from the front opening side into a holder (27) having a substantially U-shaped cross section and extending further forward from the front end of the support case (16), and is supported by a loose fit; It is configured to be able to slide laterally relative to the holder (27).

Next, the lateral sliding drive device for the reaping section (17) will be explained. As shown in FIGS. 7 and 8, there are two screw shafts (2
8), and a female screw portion (29) that engages with the screw shaft (28) on the left side surface of the tip support case (16).
A screw feeding mechanism (A) is constructed by providing the screw feeding mechanism (A). The left end of the screw shaft (28) is supported by the left support frame (25), and a driven bevel gear (30) is attached to the tip protruding from the left support frame (25). on the other hand,
A drive motor (32) is installed above the driven bevel gear (30) and on the upper and lateral sides of the left merging conveyance device (4), and the downward output shaft of the drive motor (32) and the screw shaft (28) ) are transmission-connected via a transmission shaft serving as a downward transmission mechanism (33). In the figure, (34) is a drive bevel gear that is attached to the lower end of the transmission mechanism (33) and meshes with the driven bevel gear (30), and (31) is the downward output shaft of the drive motor (32) and the transmission mechanism (33).
).

As shown in Figures 1 and 2, the screw feed mechanism (A)
The screw shaft (28) has a spiral spiral body (28a) on the shaft body (28a).
28b) is wound with a large pitch, and the female threaded portion (29) has the screw shaft (
Two occlusal bodies (29'') that stand up perpendicularly to 28) and are connected with a mounting part (2911) having a mounting surface (29C) on the same plane are protruded from the tip support case (16). By screwing the bolt (38) and the oak (42) into the stay, the structure is configured so that the occlusion occurs only in a part around the screw shaft (28).
29') It is sufficient to attach the two pieces in opposite directions so that their mounting surfaces (29C) face each other, that is, in a shape of the character ``ノ\''. If it is made of resin, it has the advantage that only one type of mold is needed.

In this way, by increasing the pitch of the screw shaft (28) and creating a small screw feed mechanism (A>) in which the engaging part of the female screw part (29) that engages is one pitch in total, it is possible to reduce mud and dirt. It is possible to reduce clogging with foreign substances such as, etc., and since only one type of occlusal body (29°) is required, mass production is also excellent.

On the other hand, as shown in FIGS. 8 and 9, the sliding shaft (1
8) covering the bevel gear transmission mechanism (22) provided at both ends with the first bevel gear case (35),
This first bevel gear case (35) is raised as a support base to set up the transmission case (43), and a second bevel gear case (37) is provided in the middle of this raised transmission case (43). The power is branched from the bevel gear case (37), and the transfer bell with protrusion (4B) and the packer
A branch structure is formed to supply power to 4A). Then, a mounting base is extended from this second bevel gear case (37), and a drive motor (32) is attached to this mounting base.

In addition, (36) is a joint member with very slight play, such as spline fitting, and the first sliding frame (2
3) and the tip support case (16), and the second sliding frame (26) and the holder (27), resulting in sliding of the reaping section with respect to the main frame (12). The bending stress acting on the moving shaft (18) is absorbed by this joint member to prevent undue stress from being applied to the sliding shaft (18).

[Another example]

The screw shaft (28) of the screw feed mechanism (A) and the female nut part (2)
9) is a screw shaft (4) as shown in FIGS. 4 and 5.
A combination of (44) and (44) may be used. Further, as shown in FIG. 6, the female nut portion (29) may be arranged such that two nut members (46) each having a 90° arcuate nut surface are arranged 180° opposite each other. Further, the above-mentioned occlusal body (29°) may be attached with a one-pinch separation.

In summary, the slide device according to the present invention is configured such that the female threaded portion of the screw feeding mechanism engages only in a portion around the screw shaft, that is, the female nut portion that engages with the screw shaft is This means that there is always a part in which the occlusion is open within the pitch cabinet.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the slide device for a combine harvester according to the present invention, FIG. 1 is a front view of the screw feeding mechanism, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. Main part side view,
Figures 4 to 6 show other embodiments of the screw feeding mechanism, respectively. Figure 4 is a front view of the main part, Figure 5 is a side view of Figure 4, Figure 6 is a side view of the main part, and Figure 7 is a side view of the main part. 8 is a front view showing the drive structure of the slide device, FIG. 8 is a front side view of the combine harvester, and FIG. 9 is a partially sectional plan view of the slide device. (9)...... Traveling machine body, (17)... Reaping section, (28)... Screw shaft, (29)...
...Female thread part, (A)...Screw feed mechanism.

Claims (1)

[Claims] This is a slide device for a combine harvester, in which a pulling reaping part (17) is attached to be movable laterally with respect to a traveling machine body (9), and a screw feeding mechanism (A) for laterally moving the reaping part (17) is provided. A slide device for a combine harvester, wherein the female screw portion (29) of the screw feed mechanism (A) is engaged only in a portion around the screw shaft (28).