JPH0555848U - Combine threshing clutch operating structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To eliminate the clutch shock in the threshing clutch that causes inconveniences such as the bevel gear being chipped due to excessive starting torque, or an excessive safety factor being set to prevent it. [Structure] A belt tension type threshing clutch is in a clutch disengaged state in which a tension pulley 11 is forcibly operated toward a belt slack side in accordance with a disengagement operation of an operation lever 20, and a tension spring 16 is deformed in accordance with an operation operation of an operation lever 20. A damper operating mechanism A is provided for exposing the tension pulley 11 to apply the biasing force to the tension pulley 11, and a damper for imparting resistance to the tension arm 13 in the moving direction of the tension pulley 11 toward the clutch engaging side. 21 are connected.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a technique for preventing a clutch shock caused by a sudden clutch engagement in a combine threshing clutch.

[0002]

[Prior Art]

 Conventionally, the threshing clutch of combine harvesters has been constructed in a belt tension type like the one disclosed in Japanese Utility Model Publication No. 63-177137, and the on / off operation of the threshing clutch is not shown in the publication. The threshing clutch operating lever and tension pulley are linked by a tension spring that urges the tension pulley toward the belt pressing side, and the clutch that operates the tension pulley toward the belt slack side in response to the operation lever cutting operation. The disengaged state and the clutch engaged state in which the tension spring is deformed in accordance with the operation operation of the operation lever to apply the urging force to the tension pulley are respectively revealed (see the structure in FIG. 1).

[0003]

[Problems to be solved by the device]

 In the operation structure of the threshing clutch with the above configuration, when the operation lever is operated to the clutch engagement side, the biasing force of the tension spring acts on the tension pulley to tension the belt. When operated, the threshing clutch suddenly enters the clutch and a clutch shock occurs. Clutch shock is a phenomenon that can occur with other clutches, but in a threshing clutch to which a large load from the combine combiner's large handling cylinder acts, excessive starting torque may occur and the bevel gear on the power transmission path may be damaged. However, there were some cases in which there was a problem, or a design with an unnecessarily high safety factor was necessary in order to prevent this possibility. This is especially noticeable in all-cullet-type combine harvesters with a larger handling barrel. An object of the present invention is to eliminate the clutch shock by allowing the tension pulley to move slowly toward the belt tension side even when the operation lever is rapidly operated.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention operates an operating tool and a belt tension type threshing clutch via a tension spring that urges a tension pulley toward the belt pressing side. A flexible operating mechanism that reveals a clutch disengaged state in which the tension pulley is operated toward the belt slack side, and a clutch engaged state in which the tension spring is deformed in response to the operation of the operation tool to apply its urging force to the tension pulley. In addition to the above, the flexible operating mechanism is equipped with a damper that provides resistance in the moving direction of the tension pulley toward the clutch-engaged side at the lower side of the transmission path of the clutch operating force to the tension spring. And

Further, the operation tool and a belt tension type threshing clutch are interlocked via a tension spring for urging the tension pulley toward the belt pressing side, and the clutch cutting operation force by the operation tool is transmitted, and the clutch. By providing the interchange transmission part that prevents the biasing force of the tension spring from acting on the operating tool in the on-state, the tension pulley can be resisted against the biasing force of the tension spring with the cutting operation of the operating tool. In addition to the clutch disengagement state forcibly operated and the clutch engaged state in which the operation of the tension spring is permitted as the operation tool is engaged, the accommodation operation mechanism is provided, and the clutch for the accommodation transmission section of the accommodation operation mechanism is provided. Transmission of operating force A resistance is applied to the lower side of the passage in the direction of movement of the tension pulley toward the clutch engagement side. It may be equipped with a damper.

[0006]

[Action]

 In other words, the resistance of the damper regulates the speed of movement of the tension pulley toward the clutch entry side, which allows the threshing clutch to be connected slowly even if the operation tool is rapidly entered and operated. The shock can be reduced, and the inconvenience such as damage to the bevel gear can be eliminated. Further, in the configuration of claim 1, in the lower side portion of the transmission path of the clutch operating force to the tension spring, in the configuration of the second aspect, to the lower side portion of the transmission path of the clutch operating force to the interchange transmission portion, that is, the resistance of the damper is Since it is provided so that it does not act on the operating tool, the operating tool can be operated lightly as before. This is advantageous in that the clutch operating force of the operating tool does not become heavier than, for example, a means for controlling the clutch engagement speed by applying a damper to the operation lever itself.

[0007]

[Effect of the device]

 Therefore, in the threshing clutch operating structure according to any one of claims 1 and 2, by devising a damper for the tension pulley so as not to interfere with the operating tool, a light and quick clutch operation can be performed while the operating tool is operated. The present invention provides a threshing clutch that can be smoothly engaged and operated regardless of the on / off operation and eliminates the inconveniences such as lack of gears and setting of an excessive safety factor.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings in the case of an all culm input type combine. FIG. 3 shows an all-culm throw type combine, 1 is a mowing section, 2 is a threshing section 3 and the like, a threshing section, 4 is a sorting section, 5 is a crawler traveling device, and 6 is a control section. In FIG. 1, reference numeral 7 is a counter shaft to which engine power is input, and a belt 10 is wound around the counter shaft 7 and an input shaft 9 of a bevel gear mechanism 8 that is interlocked with the handling cylinder 3. A belt tension type threshing clutch 12 is configured by loosening the belt 10 with a tension pulley 11. Next, the operation structure of the threshing clutch 12 will be described.

As shown in FIGS. 1 and 2, the tension arm 13 for supporting the tension pulley 11 is configured to be swingable by a balance around a fulcrum P, and the tension arm 13 is provided with an operation lever 20 provided in a control section 6. A flexible operation mechanism A for interlocking and opening and closing the threshing clutch 12 is provided. That is, the first rod 14, the first L-shaped crank 15, the compression type tension spring 16, the push-pull rod 17, the second L-shaped crank 18, and the second rod 19 which are connected to the arm tip side portion of the tension arm 13 are used for the accommodation operation. Mechanism A is configured. In the figure, the push-pull rod 17 is pivotally supported on the right side of the tension spring 16 and the first L-shaped crank 15 is pivotally supported on the left side of the tension spring 16, respectively. Penetrates the lower end of the. Further, a damper 21 is provided at the arm tip of the tension arm 13 so as to exert resistance in the moving direction of the tension pulley 11 to the belt tension side. The damper 21 may be a single-effect type or a double-effect type. Explaining the operation of the clutch operation, when the operation lever 20 is operated to the entry side, the push-pull rod 17 compresses the tension spring 16 (state of FIG. 1), and the reaction force causes the tension arm 13 to rotate clockwise. When the belt 10 is urged, the belt 10 is tensioned and the belt 10 is clamped (state shown in FIG. 2). At this time, a resistance acts on the tension arm 13 due to the action of the damper 21 and causes the tension arm 13 to swing slowly. Therefore, even if the operation lever 20 is momentarily turned on and off, the tension arm 13 oscillates at a slow speed due to the energy dissipating action of the damper 21, and the clutch engagement behavior becomes gentle with little shock. is there.

By the way, it is necessary to move the tension pulley 11 sufficiently to the belt slack side during the clutch disengagement operation, but it may not be possible to move the tension pulley 11 to a reliable disengagement position due to a stroke error of the damper 21 or the like. Therefore, as shown in FIG. 4, the movable rod 21a connecting hole of the damper 21 of the tension arm 13 should be made a long hole so as to be flexible so that the tension arm 13 can move sufficiently during the clutch disengagement operation. It would be convenient.

[Other Embodiments] As shown in FIG. 5, a tension spring 16 for engaging and urging the clutch is caused to directly act on the tension arm 13, and a wire (corresponding to an interchange transmitting portion) 22 is attached to the tension arm 13. In the interchange operation mechanism A in which the operation lever 20 is interlockingly connected via the, the clutch operation structure in which the damper 21 directly acts on the tension arm 13 may be used. With this means, the slack of the wire 22 caused by the clutch engagement operation allows the tension belt 16 to freely tension the belt, and the operation lever 20 disengages the wire 22 to tension the wire 22 and pull the spring. The clutch disengaged state appears by the forced movement of the tension arm 13 against the biasing force of 16. In this case, only by releasing the operating lever 20 from the cut position, the operating levers may be suddenly engaged in the clutch by the urging force of the tension spring 16, so that the damper 21 is effective for canceling the clutch shock.

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 invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an operation system diagram showing an operation structure of a threshing clutch.

FIG. 2 is a system diagram showing a flexible operating mechanism with a clutch engaged.

FIG. 3 is a side view of the combine.

FIG. 4 is an operation system diagram of main parts showing another structure of the threshing clutch.

FIG. 5 is an operation system diagram showing another embodiment of the threshing clutch operation structure.

[Explanation of symbols]

 11 Tension Pulley 12 Threshing Clutch 16 Tension Spring 20 Operating Tool 21 Damper A Flexible Operating Mechanism

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinzo Kashino, 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory, Inc. (72) Ryuichi Minami, 64, Ishizukitamachi, Sakai City, Osaka Prefecture, Kubota Sakai Co., Ltd. Inside the Factory (72) Inventor Shoichi Nakatani 64, Ishizukita-machi, Sakai City, Osaka Prefecture KUBOTA Sakai Factory

Claims (2)

[Scope of utility model registration request] 1. An operating tool (20) and a belt tension type threshing clutch (12) are provided with a tension pulley (11).
And a clutch disengaged state in which the tension pulley (11) is operated toward the belt slack side in association with the disengagement operation of the operation tool (20). The accommodation operation mechanism (A) is provided which deforms the tension spring (16) in response to the operation operation of the operation tool (20) and provides a clutch engagement state in which the biasing force is applied to the tension pulley (11). At the same time, a damper (21) for imparting resistance in the moving direction of the tension pulley (11) toward the clutch-engaged side is provided at the lower side portion of the transmission path of the clutch operating force to the tension spring (16) in the interchange operation mechanism (A). ) Is equipped with a combine threshing clutch operation structure. 2. An operating tool (20) and a belt tension type threshing clutch (12) are provided on a tension pulley (11).
Are interlocked via a tension spring (16) for urging the belt pressing side, the clutch disengaging operation force by the operation tool (20) is transmitted, and the urging force of the tension spring (16) in the clutch engaged state. Is the operation tool (2
0) is provided with an interchange transmitting section (22), so that the tension pulley (11) is resistant to the urging force of the tension spring (16) in accordance with the cutting operation of the operation tool (20). Then, the interchangeable operation mechanism (A) that presents a clutch disengaged state in which the belt is relaxed forcibly operated and a clutch engaged state in which the operation of the tension spring (16) is allowed in association with the operation of operating the operation tool (20). ), A resistance is imparted to a moving direction of the tension pulley (11) toward the clutch-engaged side at a lower side portion of a transmission path of a clutch operating force to the accommodation transmitting section (22) in the accommodation operating mechanism (A). Combine threshing clutch operation structure equipped with a damper (21) that