JPH0740823B2 - Sliding structure of cutting unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a combine in which a mowing unit is mounted so as to be slidable laterally with respect to a traveling machine body, and is capable of favorably performing split cutting and swivel cutting in wetlands. The structure of the slide portion in FIG.

[Conventional technology]

As a conventional sliding portion structure of the mowing portion, there is one proposed by the present applicant as Japanese Patent Application No. 62-316867 (JP-A-1-157311). The proposed slide structure is
The front part of the traveling machine body is provided with a raising and mowing unit (17) for mowing grain culms, and a first sliding frame (across the pair of left and right support frames (25), (25) in this mowing unit (17). 23) and second
Along with the sliding frame (26), the first sliding frame (23) can be laterally slid with respect to the support case (16) at the tip of the main frame (12) extended from the traveling machine body. By pivotally fitting, the second sliding frame (26) is engaged with and supported by a holder (27) fixed to the support case (16) and having a forward open substantially U-shaped cross section so as to be relatively slidable. The reaper (17) is configured to be slidable laterally with respect to the main frame (12) (see FIG. 2) and extends over the entire width of the holder (27) at the tip of the support case (16). Then, the second sliding frame (26) is slidably guided to regulate its vertical movement.

[Problems to be Solved by the Invention]

In the above-mentioned proposed prior art, the second sliding frame is simply fitted into the holder, but in order to allow manufacturing error, assembly error and bending deformation of the second sliding frame (26), There was some play between the vertical direction of both. Therefore, mud, dust, etc. attached to the second sliding frame (26) easily enter between the second sliding frame (26) and the holder (27), especially on the side receiving the lower surface of the second sliding frame (26). When mud or dust entered, it was strongly contacted due to the weight of the mowing part, so that there was a phenomenon in which it was prone to severe wear. In addition, the sliding contact resistance increases due to the entry of mud and dust into the sliding contact portion, and a large driving force is required for the lateral sliding of the cutting portion.

The present invention provides, in the sliding portion structure having the above-described configuration, a structure for improving durability at the sliding contact portion between the second sliding frame and the holder and reducing sliding resistance as an extremely simple and inexpensive structure. The purpose is to

[Means for Solving the Problems]

In order to achieve the above object, the present invention relates to a sliding part structure of a mowing part, which is made of resin which is slidably contacted with the second sliding frame (26) below the inner surfaces of the left and right ends of the holder (27). The bushes (31), (31) are provided, and a scraper portion (33) acting on the second sliding frame (26) is integrally formed on the outer end portions of the bushes (31), (31). It is characterized by points.

[Work]

According to the above configuration, the load of the mowing portion acting on the second sliding frame (26) is supported only by the resin bushes (31) and (31) provided on the left and right ends of the holder (27), and the second There is no direct sliding contact between the sliding frame (26) and the holder.

Further, the mud and dust adhering to the second sliding frame portion exposed to the outside of the holder (27) is removed by the scraper portion (33) formed at the outer end portion of the bush (31), and the second sliding frame ( It rarely enters between 26) and Bush (31). In addition, even if mud or dust enters the holder (27) due to the slide of the cutting part, the bushes (31) on the left and right,
It will be released into the void formed between (31),
These foreign substances that have entered do not increase the slide resistance.

〔The invention's effect〕

As described above, according to the present invention, by providing the resin bush with the scraper portion on the left and right end portions of the holder, it is possible to reduce the amount of dirt and dust caught in the holder and to reduce the sliding contact resistance. (2) The sliding frame can be slidably supported, and the sliding contact part can be made to slide smoothly while improving the durability of the sliding contact part. Moreover, since the scraper portion, which requires a moderate elasticity, is integrally formed on the bush by utilizing the fact that the bush is made of resin, for example, as compared with a means for assembling the bush and the scraper as separate parts. The structure is simple and inexpensive to implement, and its practical effects are great.

〔Example〕

FIG. 4 shows the front part of the combine to which the present invention is applied. This combine is a raising device (2) for raising the planted culm sown by the weeding tool (1), a mowing device (3) for mowing the grain culm after the raising, and a cutting width for the mowing culm. Left and right packers (4A) as a confluent transport device (4) that focuses on the center of the
And a conveyor belt (4B) with left and right projections, a vertical conveyor (6) for conveying the focused grain culm to a rear threshing device (5) equipped with a threshing feed chain (36), etc. And a driver's seat (7) disposed laterally of the vertical transfer device (6).

The weeding tool (1), the raising device (2), the mowing device (3), the merging / conveying device (4), etc. are collectively referred to as a mowing unit (17).
The horizontal slide structure of the reaper (17) with respect to the traveling machine body (9) will be described. As shown in FIGS. 2 to 3, a vertically oriented frame (10) is erected at the front end of the traveling machine body (9), and a horizontally oriented transmission case (11) is provided at the upper end of the vertically oriented frame (10). It is rotatably supported around its axis. The main frame (12) in the front-back direction of the machine is fixed to the outer peripheral surface of the lateral transmission case (11), and the transmission shaft (13) of the lateral transmission case (11) and the transmission shaft (14) of the main frame (12). And the bevel gear mechanism (15) to connect the sideways transmission case (11) and the transmission shaft (1
The end input pulley (8) of 3) receives power from the engine (not shown) and transmits it to the transmission shaft (14) in the main frame. A support case (16) is provided at the tip of the main frame (12), and the support case (16) is provided.
A reaper (17) is attached to.

The mounting structure of the mowing part (17) in the tip support case (16) will be described. As shown in FIG. 2 and FIG. 3, at the main frame (12) mounting portion of the tip support case (16), a sliding shaft (18) in a posture along the lateral direction of the machine body has its own axial center (X). Bearings are supported so that they can slide in any direction, and a passive bevel gear (1
A drive bevel gear (20) is fixed to the tip of the main shaft transmission shaft (14) and the main frame transmission shaft (14) to form a transmission structure for the sliding shaft (18). This passive bevel gear (19) has a sliding shaft (1
It is externally fitted to the hexagonal intermediate part of 8) and is integrally rotatable, and is rotatably supported by the tip support case (16) via a bearing (21) so that it can rotate laterally of the sliding shaft (18). It has a structure that allows sliding. The left and right ends of the sliding shaft (18) that project left and right from the tip support case (16)
Bevel gear transmissions (22) and (22) for supplying power to the raising devices (2) and (2) are provided, respectively.

On the front side of the sliding shaft (18), a pipe-type first sliding frame (23) is pivotally supported by the tip support case (16) via bushes (24) and (24) so as to be able to slide laterally. At the same time, the left and right support frames (25) and (25) fixed to the left and right weeding tool support rods are connected and fixed to the left and right ends protruding from the tip support case (16). Further, a second sliding frame (26) is installed over the left and right support frames (25) and (25) further forward than the first sliding frame (23), and at the same time the supporting case (16) is A holder (27) having a substantially U-shaped cross section, which extends further forward from the front end, is inserted and loosely supported from the front opening side and is configured to be relatively slidable relative to the holder (27).

As shown in FIGS. 1 and 3, resin-made bushes (31) and (31) having high wear resistance are provided on the lower surface of the holder (27) below the inner surfaces of the left and right ends of the holder (27). Pin part (3
5) is fitted and fixed in the hole of the holder (27), and the second sliding frame (between the upper surfaces of the bushes (31) and (31) and the upper surface of the inner surface of the holder (27) is fixed. 26) is held so that it can slide relative to one another. Then, as shown in FIG. 3, a lip-shaped scraper portion (33) is integrally formed on the outer ends of the bushes (31) and (31) along the cross-sectional shape of the second sliding frame (26). Foreign matter such as mud and dust attached to the lower surface of the second sliding frame (26)
The sliding frame (26) and the holder (27) are prevented from invading the holder (27) due to relative lateral sliding. As shown in FIG. 5, if a lip-shaped scraper portion (33 ') is integrally formed also on the inner end of the bush (31), it is accumulated between the left and right bushes (31), (31). It is possible to prevent dirt and dust from entering the sliding contact surface, and further improve durability.

Next, the lateral slide drive device of the reaper (17) will be described. As shown in FIGS. 3 and 4, in the tip support case (16), the screw shaft (2
8) is inserted, and a female screw member (29) that engages with the screw shaft (28) is provided on the left side surface of the tip support case (16). The left end of the screw shaft (28) is supported by the left support frame (25) and the left support frame (25).
A driven bevel gear (30) is attached to the more protruding tip. Then, this driven bevel gear (30) is connected to the motor (3
The screw shaft (28) is rotated by being driven by the drive bevel gear (34) connected to the rotating shaft of (2) so that the cutting section (17) can be laterally slid.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of the sliding part structure of the reaping part according to the present invention. Fig. 1 is a vertical sectional front view of a main part, Fig. 2 is a transverse plan view of the sliding part, and Fig. 3 is a vertical side view of the sliding part. , 4th
FIG. 5 is a side view of the front part of the combine, and FIG. 5 is a vertical sectional front view of a main part of another embodiment. (12) …… Main frame, (16) …… Support case,
(17) …… Mowing section, (23) …… First sliding frame, (2
5) …… Support frame, (26) …… Second sliding frame,
(27) …… Holder, (31) …… Bush, (33) ……
Scraper part. .

Claims (1)

[Claims] 1. A raising and mowing section (17) for mowing grain stalks is provided at a front portion of a traveling machine body, and the first mast section extends over a pair of left and right support frames (25), (25) in the mowing section (17). The sliding frame (23) and the second sliding frame (26) are installed, and the first sliding frame (23) is extended from the traveling machine body. A support case (16) is provided at the tip of the main frame (12). ), And the second sliding frame (26) is slidably mounted on a holder (27) having a substantially forward U-shaped cross section fixed to the support case (16). A slide part structure of a mowing part (17) in which the mowing part (17) is configured to be slidable laterally with respect to the main frame (12) by movably engaging and supporting the holder. (27)
The second sliding frame (26) is provided below the inner surfaces of the left and right ends of the
The resin bushes (31), (31) slidably contacting with are provided, and the scraper portion acting on the second sliding frame (26) at the outer ends of the bushes (31), (31). Slide part structure with (33) integrally formed.