JPH0618435Y2 - Agricultural work machine clutch operation structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention links a transmission clutch operating arm and a manual operating lever via a release wire, and operates a clutch operated by an urging mechanism to be urged to an entrance side. The present invention relates to a clutch operating structure for an agricultural work machine including an automatic clutch that forcibly moves an arm from an on position to an off position.

[Conventional technology]

First applied by the present applicants as a clutch operating structure for this type of agricultural working machine (Japanese Utility Model Application No. 62-3984 (Japanese Utility Model Application Sho 63-1124).
No. 25)), the configuration is such that the clutch operation arm and the manual operation lever are linked via the release wire, and the spring as a mechanism for urging the clutch operation arm to the entry side is connected to the manual operation lever. And the release wire.

[Problems to be solved by the invention]

As described above, in the case where the release wire and the spring are inserted in series, as shown by the phantom line in FIG. 5, it is necessary for a predetermined extension (entrance ₁ ) from the free state (biasing force = 0). It was necessary to produce a sufficient clutch operating force (P), and a large spring constant (k ₁ ) was required. Therefore, clutch operating force (P)
When the clutch disengagement operation force is further applied to the spring by the auto clutch mechanism (25) in the engaged state, the spring (23) expands (encloses) and the clutch disengagement force (P ₂ ) due to this spring is large. It becomes large according to the spring constant (k ₁ ). Therefore, the force acting on the wire and other members applied to the auto clutch mechanism becomes excessive, and the strength must be improved more than necessary.

The purpose of the present invention is to rationally select the installation position of the urging mechanism with respect to the clutch operating arm and to force the urging force of the urging mechanism of the conventional configuration even if the clutch is forcibly disengaged by the automatic clutch mechanism. The point is to provide something that can be made smaller than something.

[Means for solving problems]

The characteristic configuration according to the present invention is that one of an inner end and an outer end of a release wire, one end of which is connected to a manual operation lever, is attached to the clutch operation arm and the other is attached to a relay swing arm. A point at which the biasing mechanism is connected to the relay swing arm so as to swing the relay swing arm so that the inner end and the outer end are separated by the biasing force of the mechanism; In order to prevent the action below the force, the swing limit of the relay swing arm is provided, and when the automatic clutch mechanism is disengaged, the relay swing arm should swing toward the clutch operation arm side. The linking tool that constitutes the automatic clutch mechanism is linked to the relay swing arm, and the action and effect are as follows.

[Action]

Due to the characteristic structure, as shown in FIGS. 1 and 5, the spring as the biasing mechanism (23) is given an initial biasing force (P ₀ ). First, as shown in FIG. 1, when the manual operation lever (19) is operated against the initial biasing force (P ₀ ),
Since the inner wire end (21c) is pulled, the clutch operating arm (15) is turned on and off, and the relay swing arm (22) at the swing limit is set by the spring (23) in the initial biasing force (P ₀ ) state. ) Is pushed by the outer end (21d) and swings toward the clutch operating arm (15). Then the spring
(23) is pulled to reveal the clutch operating force (P). As shown in FIG. 2, when the auto clutch mechanism (25) is further actuated in the clutch disengagement direction from this state, the inner wire end (29a) of the release wire as the linkage tool (29) constituting the auto clutch mechanism (25) is ) Is pulled, so that the relay swing arm (22) is swung in the direction in which the outer end (21d) on the opposite side approaches the clutch operation arm (15), and the clutch operation arm (15) is disengaged. Return to position. At that time, the spring (23) is further pulled, and the biasing force (P ₁ ) is revealed.

That is, the manual operation lever (19) and the clutch operation arm (15)
By providing the relay swing arm (22) in the linkage mechanism with the relay swing arm (22), the biasing mechanism (23) can be linked to the relay swing arm (22). The initial tension can be set without affecting the linkage mechanism between the clutch operating arm (15) and the clutch operating arm (15). Therefore, the spring constant (k ₂ ) may be smaller than the conventional spring constant (k ₁ ) in order to obtain the similar clutch operating force (P). As shown in FIG. 5, for this reason, the spring biasing force (P ₁ ) is larger than the biasing force (P) corresponding to the clutch engaged state by the operation of the auto clutch mechanism (25) from the clutch engaged state. Can be smaller than the conventional case (P ₂ ).

[Effect of device]

As a result, the urging force acting on the clutch operating arm etc. can be reduced, and it can be advantageously developed in terms of strength configuration, and the initial urging force of the urging force can be set arbitrarily, and the balance with the clutch operating force etc. can be achieved after assembly. It also has the practical advantage of being adjustable.

〔Example〕

As shown in FIG. 1, FIG. 2, and FIG. 4, the mowing pretreatment device (A) including the raising device (1), the mowing device (2), the vertical conveying device (3), etc. Attach it to the main frame (4) in the facing posture and at the rear end to swing it up and down with respect to the horizontal support shaft (X) provided at the front end of the machine side, so that the pre-cutting process The device (A) is configured to be swingable up and down, and the threshing device (5) on the side of the machine behind the vertical transfer device (3) and the driver's seat on the lateral side of the vertical transfer device (3).
(6) is arranged to form a combine.

As shown in FIG. 1 and FIG. 2, an engine and a mission case (8) as a prime mover (7) are arranged at the front end of the fuselage, and the engine output shaft (7a) and the mission input shaft are arranged between the engine output shaft (7a) and the mission input shaft. The first belt transmission mechanism (9) is installed, and the second belt transmission mechanism is provided between the engine output shaft (7a) and the threshing input shaft (10).
(11) is installed. 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 transmission-coupled to the lateral support shaft (X). At the same time, this lateral support shaft (X) receives power by installing an input pulley (13) at the shaft end and installing a third belt transmission mechanism (17) between it and the output shaft on the mission case (8) side. ing. A clutch operating arm (15) pivotally supporting a tension pulley (14) is provided for the third belt transmission mechanism (17), and a tension-type reaping clutch (16) is configured. Also, a clutch operation arm (18A) similarly having a tension pulley axially supported also for the second belt transmission mechanism (11).
A tension type threshing clutch (18) equipped with is provided.

The following operating mechanism is provided for the reaping clutch (16). On the side of the driver's seat (6), a manual control lever (1
9) is provided, and the reaping clutch (16) is linked to the manual operation lever (19) through the first release wire (21). ) Is provided. 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) on the other end side is used for the clutch operation. The outer end (21d) is fixed to the relay swing arm (22) while being connected to the arm (15).
Further, a spring is installed on the relay swing arm (22) as a biasing mechanism (23) for biasing the harvesting clutch (16) toward the entrance side, and the relay swing arm (22) is operated by the clutch operation. arm
(15) Apply a biasing force to swing away from (15). Moreover, the relay swing arm (22) is provided with a swing limit (a) in a direction away from the clutch operating arm (15). (24) is provided. Then, due to this swing limit (a), the spring (23) is set to a length at which the initial tension appears. Therefore, the swing limit (a)
A certain initial tension is applied at the position and the clutch operating arm (1
The greater the swing to the 5) side, the greater the tension will be applied.

Here, when the manual operation lever (19) is operated to the entry side, first, the inner wire operates to pull the clutch operation arm (15), and the clutch operation arm (15) pulls the cutting clutch (1
6) is switched to the on state, and the relay swing arm (22) is pushed by the outer end (21d) and the clutch operation arm
Swing to the (15) side. Then, the spring (23) is pulled and the urging force for urging the reaping clutch (16) appears.

For the mowing clutch (16), the mowing pretreatment device (A)
An automatic clutch mechanism (25) for forcibly disengaging the reaping clutch (16) from the engaged state by the upward swinging of is provided, which will be described below. As shown in FIG. 3, the drive arm (26) for the clutch operating arm (15) is installed in the vertical transfer device.
It is pivotally supported on the lateral side of the driver's seat (6) avoiding interference with (3) so that it can swing up and down. The drive arm (26) includes a roller portion (26A) that contacts and follows a cam mechanism (27), an arm portion (26B) that supports the roller portion (26A), and an arm portion (2).
6B) is fixed to the horizontal support shaft (26C), and the transmission arm (28) fixed to one end of the horizontal support shaft (26C) is connected to the linkage tool (2
It is linked to the cutting clutch (16) by linking to the relay swing arm (22) through the second release wire as 9). As shown in FIGS. 1 and 2, the second
The inner end (29a) at one end of the release wire (29) is connected to the transmission arm (28) through a connecting fitting (30) having a long hole.
The outer end (29b) is fixed and the second end
The inner end (29c) at the other end of the release wire (29) is fixed, and the outer end (29d) is fixed at the relay swing arm (2
It is linked to 2). Here, the mainframe (4)
At the front end of the case is a lateral transmission case (31) for the reaper (2).
The support frame (32) is fixedly mounted and is connected to the rear surface of the raising device (1) located further forward than the lateral transmission case (31). A cam mechanism (27) acting on the roller portion (26A) of the drive arm (26) is fixed to the upper surface of the support frame (32).

The cam mechanism (27) includes a cam surface (27A) that makes a step necessary for disengaging the cutting clutch (16) and a lateral support below the surface that contacts the roller portion (26A) from the upper end side. It is composed of an arcuate surface (27B) centered on the axis (X), and since the roller portion (26A) is along the arcuate surface (27B) after the clutch (16) is disengaged, it is substantially Does not swing the drive arm (26).
When the drive arm (26) is swung up by the cam surface (27A), the relay swing arm (22) is swung to the clutch operating arm (15) side, and accordingly, the manual operating lever ( Clutch operation arm (15) even when 19) is in the on position
Returns to the clutch disengaged position. As described above, the automatic reaping clutch operation mechanism (25) that automatically turns the reaping clutch (16) on and off as the reaping pretreatment device (A) moves up and down is configured.

[Another embodiment]

B. The above-mentioned transmission clutch is not limited to the mowing clutch (16), but can be applied as long as it is a combination of a manual operation mechanism and an automatic clutch mechanism, and is not limited to a combine and is used for agricultural work machines. Any clutch can be applied.

The lock clutch operating arm (15) and the drive arm (26) may be linked by a connecting rod or the like, and the linking tool (29) is not limited to a wire.

The urging mechanism (23) is not limited to a single spring, and a plurality of springs may be used, and the spring and other mechanism (wire, damper, etc.) may be used together.

D) The arm portion (26B) of the drive arm (26) is the roller portion (26A)
It is also possible to adopt a configuration in which the relative positional relationship between the cam mechanism (27) and the roller portion (26A) can be finely adjusted by being configured by a tip end that pivotally supports and a base end portion that supports the tip end in a stretchable manner.

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 drawings]

The drawings show an embodiment of a clutch operating structure of an agricultural work machine according to the present invention. Fig. 1 is a side view showing a reaping clutch before the automatic clutch mechanism is activated, and Fig. 2 is a side view showing a reaping clutch after the automatic clutch mechanism is activated. FIG. 3 is a front view of a drive arm for a cam for an automatic clutch mechanism, FIG. 4 is a plan view of a pre-mowing treatment device, and FIG. 5 is a graph showing a spring characteristic of a biasing mechanism for a mowing clutch. (15) …… Clutch operation arm, (19) …… Manual operation lever, (21) …… Release wire, (21c) …… Inner end, (21
d) …… Outer end, (22) …… Relay swing arm, (23) …… Bias mechanism, (25) …… Auto clutch mechanism, (29) …… Coupling tool, (a) …… Swing Limit.

Claims (1)

[Scope of utility model registration request] 1. A clutch operation in which a transmission clutch operating arm (15) and a manual operating lever (19) are linked via a release wire (21) and which is urged toward the entrance side by an urging mechanism (23). A clutch operating structure for an agricultural work machine equipped with an automatic clutch (25) for forcibly moving the arm (15) from the on position to the off position, wherein one end of a release wire (21) is connected to a manual operating lever (19). Either one of the inner end (21c) and the outer end (21d) at the other end is connected to the clutch operation arm (15).
The other end to the relay swing arm (22), and the urging force of the urging mechanism (23) causes the inner end (21c) and the outer end to
In order to swing the relay swing arm (22) so that the relay swing arm (22) and the relay swing arm (22) are separated, the biasing mechanism (2
3) is connected, and the swing limit (a) of the relay swing arm (22) is connected to prevent the action of the biasing mechanism (23) below the set biasing force.
When the automatic clutch mechanism (25) is disengaged, the automatic clutch mechanism (25) is configured to swing the relay swing arm (22) toward the clutch operation arm (15) side. A clutch operating structure for an agricultural work machine in which a linking tool (29) for connecting to a relay swing arm (22) is linked.