JPH083247Y2 - Mowing clutch operating device for harvesting harvester - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a harvesting clutch operating device of a harvesting machine such as a combine binder and a riding-type binder with a collecting device. A cam follower that is pressed and displaced by contact with a cam provided with a mowing part when it is raised above a set height is installed on the machine side, and the cutting clutch is automatically disengaged by the displacement of this cam follower. , A cam follower and a clutch operating mechanism are related to a harvesting clutch operating device of a harvesting harvester.

[Prior Art] The above-mentioned reaping harvester includes a means for automatically stopping the driving of the reaper when the height position of the reaper with respect to the machine body exceeds a set value, a so-called auto clutch, one example of which is It is disclosed in Japanese Utility Model Publication No. 1-79921.

Since the mowing unit is raised during non-mowing work such as turning around a ridge or traveling, it is necessary to turn on and off the mowing clutch with the automatic clutch while raising the mowing unit. It was easy to operate and excellent in safety because it did not forget to disengage the clutch.

[Problems to be solved by the device]

In the conventional auto clutch, a state in which the auto clutch is set and a state in which the auto clutch is released and the reaping clutch is manually turned on and off can be selected, and can be used properly.

However, since the auto clutch was normally set to operate by raising the minimum necessary amount of the mowing unit in order to improve work efficiency, when the amount of sinking of the aircraft to the ground becomes large during work in wetlands, Since the relative height position with respect to the aircraft is higher than usual, the mowing part exceeds the set height position during mowing work in the wetland, and it is inconvenient that it can not be used in the auto clutch state even though it is a work form that can use the auto clutch. Therefore, it is necessary to switch to the manual operation, and the effect of the auto clutch cannot be fully utilized, and there is room for improvement.

The present invention has an object to solve the above inconvenience.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention uses a cam provided on the mowing part when the mowing part that can swing up and down around a horizontal support shaft is lifted above a set height with respect to the machine body. A cam follower that is displaced by pressing is provided on the machine side, and a reaping clutch operating device for a harvesting harvester in which the cam follower and the clutch operating mechanism on the machine side are linked so that the reaping clutch is automatically disengaged by the displacement of the cam follower. In, the cam is composed of a cam surface for pressing and displacing the cam follower and an arc surface centered on the lateral support shaft, and by configuring the position of the cam surface up and down in a direction along the arc surface, A feature of the present invention is that a change adjusting mechanism is provided that can change and adjust the height of the mowing unit with respect to the body at the start of pressing displacement of the cam and the cam follower.

[Action]

According to the above characteristic configuration, (a) the operation start point of the automatic clutch is set at the minimum required ascending position of the mowing unit in accordance with the height of the mowing unit against the aircraft during mowing work in dry fields. Also, when working in a wetland where the amount of subsidence of the aircraft is large, by setting the start displacement point of the auto clutch by shifting by the amount of increase in the amount of subduction of the aircraft relative to the dry field, the automatic clutch condition is maintained even in wetlands. You will be able to.

Moreover, as in the case of (b) dry fields, it is possible to operate the automatic clutch with the minimum amount of raising of the mowing section, and the height of the mowing section with respect to the aircraft is high. Even if it changes depending on the situation, it is possible to use the auto clutch in the best state according to the change.

Further, for example, in the case where both the cam and the cam follower are equipped on the machine body side, a conversion means for replacing a change in their contact points by an adjusting operation with a swing up / down of the mowing section and a change in the operation timing of the mowing auto clutch. Is required separately, and the structure is complicated and the cost is high. On the other hand, in the case of the present application, (c) the change adjusting mechanism, which is a means therefor, is used to move the cam on the cutting unit side, which is in contact with the cam follower on the machine body, in a swinging motion according to the swinging up and down movement of the cutting unit. Since it is configured by doing so, it is preferable because it does not require a separate mechanism, has a simple structure, and can be constructed at low cost.

[Effect of device]

Therefore, the effect of (a) eliminates the conventional inconvenience that the automatic clutch cannot be used in wetlands, etc., and the automatic clutch can be used regardless of the field conditions.
By the action of (b), the amount of raising of the cutting unit can be minimized, and it is possible to contribute to the improvement of work efficiency.
Further, due to the effect of (c), the means for obtaining the above-mentioned effect can be made simple and inexpensive and rational, and thereby the operation reliability can be made excellent.

〔Example〕

As shown in FIG. 3, FIG. 4, and FIG. 5, the cutting unit (A) including the raising device (1), the mowing device (2), the vertical conveying device (3), etc. ) Is attached to the main frame (4) in the front-back orientation, and the main frame (4) is attached at its rear end so as to swing up and down with respect to the horizontal support shaft (X) provided at the front end on the body side. The reaper (A) is configured to be swingable up and down, and the threshing device (5) is provided on the machine side behind the vertical transfer device (3) and the driver's seat (6) is provided on the lateral side of the vertical transfer device (3). The combine harvester is an example of a harvester.

As shown in FIG. 3 and FIG. 4, the engine and the mission case (8) as the driving part (7) are arranged at the front end of the machine body, and the first part is provided between the engine output shaft (7a) and the mission input shaft. A belt transmission mechanism (9) is installed, and a second belt transmission mechanism (11) is installed between the engine output shaft (7a) and the threshing input shaft (10). On the other hand, in the main frame (4), a transmission shaft (12) for supplying a driving force to the mowing device (2) and the raising device (1) is installed, and is connected to the lateral support shaft (X) by transmission. The lateral support shaft (X) receives power by providing an input pulley (13) at the shaft end and a third belt transmission mechanism (17) installed between the input pulley (13) and the output shaft on the mission case (8) side. .

A clutch operating arm (15) pivotally supported by a tension pulley (14) is provided for the third belt transmission mechanism (17) to form a tension-type harvesting clutch (16). Also, a clutch operation arm (18A) that also rotatably supports a tension pulley for the second belt transmission mechanism (11).
A tension type threshing clutch (18) equipped with is provided.

The following clutch operation mechanism (D) is provided for the reaping clutch (16). A manual operation lever (19) is provided on the lateral side of the driver's seat (6), and the reaping clutch (16) is linked to the manual operation lever (19) via a first release wire (21). The relay swing arm (22) is provided in the middle of the linkage. That is, the inner end (21a) of the first release wire (21) is connected to the manual operation lever arm (19A), the outer end (21b) is fixed, and the inner end (21c) at the other end is connected to the clutch operation arm. (15) and the outer end (21
d) is fixed to the relay swing arm (22).

The relay swing arm (22) is provided with a spring as a biasing mechanism (23) for biasing the harvesting clutch (16) toward the entrance side. The relay swing arm (22) is connected to the clutch operation arm (15). An urging force is applied so as to swing in a direction away from. Moreover, the relay swing arm (22) is provided with a swing limit (a) in a direction away from the clutch operating arm (15), and the stopper pin is provided to reveal this swing limit (a). (24) is provided. The swing limit (a) sets the length of the spring (23) so that the initial tension appears. Therefore, the relay swing arm (2
A constant initial tension acts on 2) at the swing limit (a) position,
The greater the swinging force toward the clutch operating arm (15) side, the greater the tension applied.

Here, if you operate the manual operation lever (19) to the entry side,
First, the inner wire is used to operate the clutch operation arm (15).
The clutch operating arm (15) switches the harvesting clutch (16) to the on state, and the relay swing arm (22) is pushed by the outer end (21d) and swings toward the clutch operating arm (15). Move. Then the spring (2
When 3) is pulled, the harvesting clutch (16) exerts a biasing force.

The cutting clutch (16) is provided with an automatic clutch mechanism (25) that forcibly disengages the cutting clutch (16) from the on state by raising and swinging the cutting unit (A).
This will be described below. As shown in FIG. 5, the drive arm (26) for the clutch operating arm (15) is connected to the vertical transfer device (3).
It is pivotally supported on the front side surface of the driver's seat (6) so as to avoid vertical interference with it so as to be vertically swingable. The drive arm (26) has a roller (26A) that contacts and follows a cam (27) described later, an arm portion (26b) that supports the roller (26A), and an arm portion (26B) fixed sideways. A transmission arm (28), which is composed of a support shaft (26C) and is fixed to one end of the lateral support shaft (26C), is linked to the relay swing arm (22) via a second release wire serving as a linkage tool (29). It is thus linked to the reaping clutch (16).

As shown in FIG. 1 and FIG. 2, the inner end (29a) at one end of the second release wire (29) is connected to the transmission arm (28) through a connecting portion (30) having an elongated hole. At the same time, the outer end (29b) is fixed, the inner end (29c) at the other end of the second release wire (29) is fixed, and the outer end (29d) is fixed to the relay swing arm (22).
It is connected to. At the front end of the main frame (4), a lateral transmission case (31) for the reaper (2) is provided.
And a support frame (32) connected to the back surface of the raising device (1) located further forward than the lateral transmission case (31). This support frame (3
A cam (27) acting on the roller (26A) of the drive arm (26) is fixed to the upper surface of (2).

The cam (27) has a cam surface (27A) that makes a step necessary for disengaging the cutting clutch (16) and a lateral support shaft (X) below the cam surface (27A) that contacts the roller (26A) from the upper end side. Since the roller (26A) is along the circular arc surface (27B) after the clutch (16) is disengaged, the drive arm (26) is substantially oscillated. It doesn't move. Then, when the drive arm (26) is swung up by the cam surface (27A), the relay swing arm (22) is swung to the clutch operation arm (15) side, and the manual operation lever (19) is accordingly driven. Clutch operation arm (15) even when is in the on position
Returns to the clutch disengaged position. As described above, the reaper (A)
An automatic clutch mechanism (25) that automatically turns on and off the reaping clutch (16) as it goes up and down.

In addition, the cam surface (27
A) is provided with a mechanism (B) for changing and adjusting the height of the mowing part (A) with respect to the body at the start of pressing displacement of the drive arm (26) as a cam follower. That is, FIG.
As shown in FIG. 2, the cam (27) is formed of a plate material, and the change adjusting mechanism (B) is formed by changing the vertical position of the cam surface (27A) along the circular arc surface (27B). There is.

More specifically, the cam surface (27A) is made of a plate material that is bent in a substantially downward U-shape, and the groove rail (33) is formed by recessing the cam surface (27A) in the arc surface (27B) by the plate thickness. And a rail member (3 that is formed in an arc shape that is concentric with the arc surface (27B).
4) and the inside of the upper surface (35) of the arcuate surface (27B), so that the cam surface (27A) becomes the arcuate surface (27B) with this rail member (34) and groove rail (33) as guide rails. It is possible to move up and down in an arc shape.

Then, a bolt (37) that contacts the downward convex portion (36) of the cam surface is screwed onto the upper surface (35), and the cam surface (27
A nut (39) for urging A) downward with two springs (38), (38) and for locking the bolt (37) and the upper surface (35) relative to each other is provided. 39) and loosen the bolt (37) to turn the cam surface (27
The relative vertical position of A) with respect to the circular arc surface (27B) is changed and adjusted.

In this case, if the lateral width of the roller (26A) is made larger than the lateral width of the cam surface (27A), an arc is generated from the cam surface (27A) of the roller (26A) regardless of the vertical position of the cam surface (27A). The rolling contact movement to the surface (27B) can be performed on a smooth surface without steps.

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

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a mowing clutch operating device for a mowing harvester according to the present invention. FIG. 1 is a partially cutaway side view showing the structure of a change adjusting mechanism, and FIG. 2 is a cam. 3 is an exploded perspective view showing the structure of FIG. 3, FIG. 3 is a view showing the operation start state of the clutch operating mechanism, FIG. 4 is a view showing the state after the operation of the clutch operating mechanism, and FIG. 5 is a plan view of the cutting unit. . (16) …… Reaping clutch, (26) …… Cam follower,
(27) …… Cam, (27A) …… Cam surface, (27B) …… Arc surface, (A) …… Mowing section, (B) …… Change adjustment mechanism,
(C) ... Airframe, (D) ... Clutch operating mechanism, (X)
…… Horizontal support axis.

Claims (1)

[Scope of utility model registration request] 1. A mowing section (A) which is swingable about a horizontal support shaft (X) and is provided on the mowing section (A) when the mowing section (A) is raised above a set height with respect to the machine body (C). A cam follower (26) that is pressed and displaced by contact with the cam (27) is provided on the machine body (C) side, and the reaping clutch (16) is automatically disengaged by the pressing and displacement of the cam follower (26). Cam follower (26) and clutch operating mechanism (D) on the machine body (C) side
And a cam surface (27A) for displacing the cam (27) by pressing the cam follower (26) and a lateral support shaft (X). And the cam follower (27B), the position of the cam surface (27A) can be changed up and down in the direction along the arc surface (27B). (26) A harvesting clutch operating device for a harvesting harvester, which comprises a change adjusting mechanism (B) capable of changing and adjusting the height of the harvesting section (A) with respect to the body at the time of pressing displacement start.