JP2011092093A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation structure of a clutch operation lever which enables the operation without sensing an intermediate threshing clutch-on operation position though adopting a detent mechanism to operate the clutch operation lever from a clutch-off state to a both clutch-on state at start of work. <P>SOLUTION: The combine harvester includes the detent mechanism 25 to hold the clutch operation lever 20, and a through mechanism 45 which does not engage an engaging portion 32 of the detent mechanism 20 with an engaged portion31 when the clutch operation lever 20 is positioned at the threshing clutch-on position ON1 in at least one operation state among the operation of the clutch operation lever 20 from the clutch-off position OFF to both clutch-on position ON2 and its reverse operation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a combine that is configured so that two types of operations, that is, turning a cutting clutch on and off and a threshing clutch on and off can be performed by operating a single clutch operating lever.

  Conventionally, as a combine that is configured to be able to perform two types of operations, on / off of a reaping clutch and on / off of a threshing clutch, by operating one clutch operating lever, as shown in FIG. A threshing clutch operating area for turning the threshing clutch on and off as a lever guide of the clutch operating lever, and a reaping clutch operating area provided in a direction orthogonal to the threshing clutch operating area. When the lever is swung in the longitudinal direction of the machine and swung forward from the clutch disengagement operation position at the rear end, the threshing clutch is engaged at the front end position. When the clutch operating lever is swung to the right from the operation position with the threshing clutch at the front end position of the threshing clutch operation area, the cutting clutch is engaged.

  In the operation of the above-described clutch operation lever, in order to enter and operate the harvesting clutch and the threshing clutch, it is necessary to operate the clutch operation lever in two directions, the front-rear direction and the left-right direction. However, normally, when starting the work, it is rare that only the threshing clutch is engaged without engaging the mowing clutch, and it is troublesome to operate the clutch operating lever in an L shape.

Therefore, just by operating the clutch control lever back and forth (straight line operation)
(1) “Clutch disengagement operation state” where the clutch operation lever is disengaged with both the mowing clutch and the threshing clutch.
(2) “Operation state with threshing clutch” in which only the threshing clutch is engaged by cutting the harvesting clutch
(3) “Operating state with both clutches” for engaging both clutches
It is conceivable to enable operation. In this case, it is necessary to employ a detent mechanism in which an engaging portion such as a roller or a ball is fitted into a notch (engaged portion) so that each operation position of the clutch operating lever can be recognized.

JP 2002-171822 A

When the clutch operating lever can be operated linearly by adopting a detent mechanism, the operability is greatly improved. Usually, at the start of work, the above-mentioned (2) “operation state with threshing clutch” is passed (through) and the above ( Operate from the lever position of 1) to the lever position of (3). However, each time the lever position (2) is passed, the feeling of operation resistance due to the detent mechanism is greatly troublesome at the lever position (2).
In order to reduce or eliminate this, it is conceivable to make the notch small, but if it is too small, not only will you not be able to feel the lever position in (2), but it will also cause the body vibration during work and unexpected clutches. When the operation lever is touched, the lever position is moved immediately, and it is not possible to immediately recognize that the lever position has moved.

  In the present invention, the engaged portion for engaging the engaging portion of the detent mechanism can be used to change the clutch disengagement operation state at the start of the operation from the clutch disengagement operation state to the both clutch engagement operation state while the clutch operation lever can be operated linearly. Even if it does not make it small, it aims at providing the combine which can be operated to the operation position with both clutches, without feeling an intermediate operation position (operation position with a threshing clutch).

[Configuration of the first invention]
1st invention is provided with the chopping clutch which interrupts the drive system of a reaping part, and the threshing clutch which interrupts the drive system of a threshing part, and if one clutch operation lever is operated to a clutch cutting | disconnection operation position, the said reaping clutch and the said threshing clutch When both clutches are in the disengaged state and operated to the operation position including the threshing clutch, only the threshing clutch is engaged with the cutting clutch in the disengaged state, and when operated to the operation position including both clutches, both the threshing clutch and the reaping clutch are operated. In a combine that is configured so that the clutch is engaged,
The clutch disengagement operation position, the threshing clutch engagement operation position, and the both clutch engagement operation positions are arranged on one straight line,
A detent that holds the clutch operation lever by engaging the engaged portion with the engaged portion when the clutch operating lever is located at the clutch disengagement operation position, the threshing clutch engagement operation position, and both clutch engagement operation positions. With the mechanism,
The clutch operation during at least one of the operation of the clutch operation lever from the clutch disengagement operation position to the both clutch engagement operation position and the operation from the both clutch engagement operation position to the clutch disengagement operation position. A through mechanism is provided that does not engage the engaging portion with the engaged portion even if the lever is positioned at the operation position including the threshing clutch.

[Operation of the first invention]
According to the first aspect of the present invention, when the clutch operating lever is operated from the clutch disengagement operation position toward both clutch engagement operation positions, or when the clutch operation lever is operated from both clutch engagement operation positions toward the clutch disengagement operation position, the clutch operation lever is Since the through mechanism that does not engage the engaged part with the engaged part when passing the threshing clutch entering operation position is provided, the clutch operating lever is in the middle of the operation between the clutch disengagement operating position and the both clutch entering operation position. When passing the threshing clutch operation position, the operation can be performed without increasing the operation resistance due to positioning by the detent mechanism (the operation resistance due to the engagement of the engaging portion engaging the engaged portion).

  According to the first invention, when the clutch operating lever is operated in the opposite direction from the clutch disengagement operation position to both clutch engagement operation positions (from both clutch engagement operation positions to the clutch disengagement operation position), or from both clutch engagement operation positions. When operated in the opposite direction to the clutch disengagement operation position (from the clutch disengagement operation position to the operation position with both clutches), the detent mechanism operates and engages at the intermediate operation position of the threshing clutch. The part engages with the engaged part. Therefore, it is possible to recognize that the clutch operation lever is located at the operation position including the threshing clutch by the operation resistance due to the positioning of the detent mechanism (operation resistance due to the engagement of the engaging portion engaging the engaged portion). The operation lever can be held at the operation position with the threshing clutch, and the operation state with the threshing clutch in which only the threshing clutch is engaged can be obtained without difficulty.

[Effect of the first invention]
Therefore, according to the first aspect of the present invention, the clutch operating lever is operated linearly when the clutch operating lever is operated from the clutch disengagement operation position to the both clutch engaging operation position or from the both clutch engaging operation position to the clutch disengaging operation position. Although it is possible, it can be operated lightly and comfortably.

[Configuration of the second invention]
According to a second aspect of the present invention, in the configuration of the first aspect, the through mechanism is configured to operate the clutch operation lever from the clutch disengagement operation position to the both clutch engagement operation position, or from the both clutch engagement operation position to the clutch disengagement operation. The engaging portion prevents the engaging portion from being engaged with the engaged portion even when the clutch operating lever is located at the operation position including the threshing clutch during any one of the operations to the position. And a cam member that retracts the engaged portion with respect to the engaged portion.

[Operation and effect of the second invention]
According to the second aspect of the invention, when the clutch operating lever is positioned at the operation position including the threshing clutch, the cam member is engaged with the engaged portion of the engaging portion so that the engaging portion is not engaged with the engaged portion by the cam member. Engagement is blocked. Thus, the engaging portion is guided to the cam member in the middle of the operation direction in which the clutch operation lever is operated from the clutch disengagement operation position to both clutch engagement operation positions or from both clutch engagement operation positions to the clutch disengagement operation position. As a result, the engaging portion does not engage the engaged portion, so that the movement of the clutch operating lever becomes smooth, and the clutch operating lever is moved from the clutch disengagement operation position to the both clutch engagement operation position or both with a single operation feeling. It is possible to operate from the clutch engagement operation position to the clutch disengagement operation position.

  Then, by retracting the cam member from the moving path of the engaging portion, the engaging portion can be engaged with the engaged portion at the operation position including the threshing clutch. In this case, when the clutch operating lever is operated from the both clutch engaged operation position to the clutch disengagement operation position, the engaging portion is engaged with the engaged portion at the threshing clutch entering operation position as in the main embodiment. Keep it like that. Alternatively, when the clutch operation lever is operated from the clutch disengagement operation position to the both clutch engagement operation position, the engaging portion is engaged with the engaged portion at the threshing clutch engagement operation position.

[Configuration of the third invention]
According to a third invention, in the configuration of the first invention or the second invention, when the clutch operation lever is operated from the clutch disengagement operation position to the both clutch engagement operation position, the clutch operation lever is set to the threshing clutch engagement operation position. The engaging portion does not engage with the engaged portion even if the clutch is operated, and the clutch operating lever is engaged with the threshing clutch when the clutch operating lever is operated from the both clutch engaged operating position to the clutch disengaged operating position. The through mechanism is configured so that the engaging portion engages with the engaged portion when positioned at the operation position.

[Operation and effect of the third invention]
Usually, in the harvesting operation by the combine, it is not possible to cut and thresh while running all the planted cereals in the field, and uncutting occurs near the edge of the vine or in the corner of the field. Therefore, it is necessary to hand-crop these uncut cropped cereals and handle them as pillows. Therefore, for this case, an operation mode in which only the threshing clutch is engaged with the mowing clutch disengaged is essential.

  According to the third invention, in the forward path in which the clutch operation lever is operated from the clutch disengagement operation position to both clutch engagement operation positions, the through mechanism acts to stop the movement of the clutch operation lever at the intermediate threshing clutch operation position. Without any operation, it is possible to operate from the clutch disengagement operation position to the clutch disengagement operation position, and in the return path to operate from both clutch engagement operation position to the clutch disengagement operation position, the detent mechanism acts at the intermediate threshing clutch operation position, Since the clutch operating lever can be positioned at the operation position including the threshing clutch, it is not necessary to separately switch the through mechanism between the operating state and the non-operating state, and the threshing clutch can be operated and operated only by operating the clutch operating lever.

  The planted cereals left uncut at the edge of the paddle or at the corner of the field are harvested by a combiner traveling on a single field, with the work assistant preparing and cutting the pillows during the harvesting process using the combine. After finishing the operation, the clutch operation lever can be operated to the operation position with the threshing clutch, and the pillow can be handled continuously. Thus, the threshing and harvesting work by the combine having good workability can be performed. Here, there is a technical significance in that the through mechanism acts on the forward path and the detent mechanism functions on the return path.

It is a whole side view of a combine. It is a block diagram which shows the power transmission system to a reaping part and a threshing part. It is a principal part side view which shows the operation structure when a mowing clutch and a threshing clutch are a cut | disconnected state. It is a principal part side view which shows the operation structure when a mowing clutch is a cut | disconnection state and a threshing clutch is an engagement state. It is a principal part side view which shows the operation structure when a reaping clutch and a threshing clutch are in an engaged state. It is a partially broken side view which shows the principal part of the operation structure of a clutch operation lever when a reaping clutch and a threshing clutch are in a disengaged state. It is a fragmentary top view which shows the drive part of a combine. It is a partially longitudinal rear view showing the main part of the operation structure of the clutch operation lever. It is an assembly exploded perspective view of a clutch operation lever. (A) is a side view showing the relationship between the clutch operating lever and the through mechanism when the clutch operating lever is located at the clutch disengagement position, and (b) is the clutch operation lever at the clutch disengagement position. It is a side view which shows the relationship between a clutch operation lever and a through mechanism when it is located between the threshing clutch entering operation position into which only a threshing clutch enters. (A) is a side view showing the relationship between the clutch operating lever and the through mechanism when the clutch operating lever is operated in the direction of both clutches including the threshing clutch and is positioned at the operation position including the threshing clutch; ) Is a side view showing the relationship between the clutch operating lever and the through mechanism when the clutch operating lever is located between the operating position with the threshing clutch and the operating position with both clutches where the threshing clutch and the reaping clutch enter. It is a side view which shows the relationship between a clutch operation lever and a through mechanism when a clutch operation lever is located in the both clutch engagement operation position in which the threshing clutch and the mowing clutch entered. (A) shows the relationship between the clutch operation lever and the through mechanism when the clutch operation lever is operated in the direction of the clutch disengagement operation position and the reaping clutch is disengaged and only the threshing clutch is engaged. Side view, (b) is a side view showing the relationship between the clutch operating lever and the through mechanism when the clutch operating lever is operated from the operation position with the threshing clutch to the position before the clutch disengaging operation position where the threshing clutch and the mowing clutch are disconnected. is there. It is a block diagram which shows the principal part of the control system of a combine. (A) and (b) are side views showing another embodiment of the through mechanism.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a combine. 1 is an operation unit, 2 is a cutting unit, 3 is a threshing unit, 4 is a grain tank, and 5 is a crawler type traveling device. Reference numeral 6 denotes a feed chain, and 7 denotes a vertical transport mechanism that joins the cereals harvested by the cutting unit 2 and sends them to the feed chain 6.

  The transmission structure to the threshing unit 3 and the reaping unit 2 will be described. As shown in FIG. 2, a hydrostatic continuously variable transmission 80 is provided in the mission case 9, and an input shaft of the hydrostatic continuously variable transmission 80 is extended into the mission case 9. The input shaft 10 and the engine 11 are interlocked by a transmission belt 12, the engine 11 and the threshing unit 3 are configured to be transmitted by the transmission belt 13, and a threshing clutch 14 is provided for the transmission belt 13. On the other hand, in the transmission case 9, an output shaft 16 to the cutting unit 2 is provided in parallel with the input shaft 10, and a cutting transmission gear mechanism 17 is provided on the output shaft 16. A transmission belt 18 is installed over the output shaft 16 and the input portion of the cutting unit 2, and a cutting clutch 19 is provided for the transmission belt 18.

  The operation structure of the threshing clutch 14 and the reaping clutch 19 will be described. The belt-tensioning type threshing clutch 14 and the belt-tensioning type reaping clutch 19 shown in FIGS. 3 to 5 are configured to be turned on and off by human operation by the clutch operating lever 20 shown in FIG.

  As shown in FIGS. 3 to 5, the threshing clutch 14 and the reaping clutch 19 are constituted by tension type clutches that are driven by an electric motor 21. As shown in FIGS. 7 and 8, these clutches 14 and 19 are manually operated by a clutch operation lever 20 that can swing around a lateral axis P along a guide groove 24 formed in the control box 23. It is configured to be turned on and off.

  As shown in FIG. 6, the clutch operating lever 20 is in the clutch disengagement operation position OFF of the threshing clutch 14 and the reaping clutch 19 at the rear position. When swinging forward from this clutch disengagement operation position OFF, the threshing clutch entering operation position ON1 is entered where the threshing clutch 14 is engaged at the intermediate position, and both clutches 14 and 19 of the threshing clutch 14 and the cutting clutch 19 are engaged at the front end position. The entry operation position is ON2. When the clutch operation lever 20 is in the threshing clutch engagement operation position ON1, only the threshing clutch 14 is engaged, and the reaping clutch 19 is disengaged.

  The clutch disengagement operation position OFF, the threshing clutch engagement operation position ON1, and both clutch engagement operation positions ON2 are arranged in a straight line so as to be positioned on one straight line in plan view. The detent mechanism 25 acts at each position of the clutch disengagement operation position OFF, the threshing clutch engagement operation position ON1 and the both clutch engagement operation positions ON2 of the clutch operation lever 20, so that the clutch operation lever 20 can be positioned.

  The clutch operating lever 20 is supported by a support plate 26 attached to the airframe so as to be swingable around a lateral axis P through a pin 27. That is, a cylindrical boss 28 through which the pin 27 is inserted is fixed to the support plate 26, and the pin 27 fixed to the clutch operation lever 20 is inserted into the cylindrical boss 28 and is prevented from being removed by the beta pin 29.

As shown in FIGS. 8 and 9, the support plate 26 is formed with a fan-shaped hole 30 constituting the detent mechanism 25, and a positioning notch 31 (engaged part) is formed on the upper part of the fan-shaped hole 30. 3) are formed.
An engagement member 37 having an engagement cylinder 32 (corresponding to an engagement portion) that engages with the notch 31 is attached to the clutch operation lever 20. The clutch operating lever 20 has a long hole 33 that is long in the vertical direction. A hooked pin 34 is inserted into the engaging cylinder 32, and the hooked pin 34 is prevented from coming off by a beta pin 35.

  The engagement cylinder 32 is rotatably supported by a U-shaped member 36 having a substantially semicircular side view and a front view by a hooked pin 34, thereby forming an engagement member 37. A U-shaped member 38 and a supporting rod 40 are fixed to the lower portion of the engaging member 37 in order to prevent the pin 34 with hooks from swinging. A holding cylinder 41 with a bottom plate that holds the support rod 40 in a vertically movable manner is attached to the clutch operation lever 20, and the support rod 40 is urged upward by a coil spring 39 built in the holding cylinder 41.

  Thus, when the clutch operating lever 20 is operated, the engaging member 37 is pressed by the coil spring 39 to the notch 31 at each position of the clutch disengagement operation position OFF, the threshing clutch engagement operation position ON1 and the both clutch position operation positions ON2. The clutch operating lever 20 is positioned by engaging the engaging cylinder 32.

  A switch pressing cam portion 42 is formed below the lateral axis P of the clutch operating lever 20. A threshing switch 43 and a cutting switch 44 are attached to the support plate 26. When the clutch operating lever 20 is in the clutch disengagement operation position OFF, both the threshing switch 43 and the cutting switch 44 are in the disengaged state. When the clutch operating lever 20 is operated to the threshing clutch entering operation position ON1, the switch piece 43a of the threshing switch 43 is pressed by the first cam portion 42a and the threshing switch 43 is turned on. At this time, the cutting switch 44 is in the cut state. When the clutch operating lever 20 is operated to the operation position ON2 for both clutches, the threshing switch 43 remains in the on state, and the switch piece 44a of the cutting switch 44 is pressed by the second cam portion 42b so that the cutting switch 44 is also in the on state. .

  A through mechanism 45 is provided above the support plate 26. The through mechanism 45 is inserted into the cam member 46, a coil spring 47 having a pair of free end portions 47a and 47b that come into contact with the locking piece 46c of the cam member 46, the support plate 26, and the cam member 46. A cam pin 48 around which the coil spring 47 is wound and a regulation pin 49 which is fixed to the support plate 26 and regulates the free end portions 47a and 47b of the coil spring 47. When the clutch operating lever 20 is operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2, the cam member 46 is brought into contact with the engagement member 37 (engagement cylinder 32) to move the cam member 46 forward. The first cam surface 46a to be pivoted to the engagement member 37 (engagement cylinder 32) when the clutch operation lever 20 is operated from the clutch engagement operation position ON2 toward the clutch disengagement operation position OFF. A second cam surface 46b that swings the cam member 46 backward, and a contact that makes contact with one of the free ends 47a and 47b of the coil spring 47 when the cam member 46 swings forward or backward. And a stop piece 46c. When the cam member 46 is swung forward (clockwise in FIG. 10), the upper free end in a state where the lower free end portion 47 a of the coil spring 47 is restricted by the restriction pin 49 fixed to the support plate 26. When the portion 47 b is lifted by the locking piece 46 c to store the restoring force and the cam member 46 is swung backward (counterclockwise in FIG. 10), the free end portion 47 b on the upper side of the coil spring 47 is connected to the restriction pin 49. In a restricted state, the lower free end portion 47a is pushed down by the locking piece 46c to accumulate restoring force. The first cam surface 46a when the cam member 46 is swinging forward is hidden when the first cam surface 46a passes through the intermediate notch 31 located at the threshing clutch entering operation position ON1. Thus, it swings in a state positioned lower than the notch 31.

  As shown in FIGS. 10A, 10B, 11A, 11B, and 12, when the clutch operating lever 20 is operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2, the clutch operation lever is operated. The engagement cylinder 32 is in contact with the first cam surface 46a of the cam member 46 of the through mechanism 45 at a position 20 (see FIG. 10B) before the threshing clutch engagement operation position ON1, and the clutch operation lever 20 Passes through the threshing clutch engagement operation position ON1 (see FIG. 11A), the engagement cylinder 32 is pushed down below the notch 31 by the first cam surface 46a of the through mechanism 45. As a result, the operator operating the clutch operating lever 20 can smoothly move the clutch operating lever 20 into the threshing clutch-entering operation position without feeling the operation load of the detent mechanism 25 when the clutch operating lever 20 is in the threshing-clutch entering operation position ON1. It is possible to operate toward the front clutch operating position ON2 beyond ON1. When the clutch operating lever 20 passes the threshing clutch engaging position ON1 and passes the position just before reaching the both clutch engaging positions ON2 (see FIG. 11B), the cam member 46 is moved as shown in FIG. The cam member 46 moves away from the engaging cylinder 32 and returns to the original position (the restoring center position of the coil spring 47 regulated by the regulating pin 49) by the restoring force of the coil spring 47. When the clutch operating lever 20 is operated to the both clutch engagement operating position ON2, the engagement cylinder 32 of the detent mechanism 25 is engaged with the notch 31, and the operation load (operating force) for moving the clutch operating lever 20 increases. The operator can feel that the clutch operation lever 20 has been operated to the both clutch engagement operation position ON2.

  The structures of the threshing clutch 14 and the reaping clutch 19 are as follows. As shown in FIG. 3 to FIG. 5, clutch arms 52 and 62 that pivotally support tension wheels 51 and 61 acting on the transmission belts 13 and 18 are provided, and a mechanism for driving the clutch arms 52 and 62 is provided. As follows: Two rotary arms 50 and 60 attached to a common rotary shaft 59; swing links 53 and 63 connected to the rotary arms 50 and 60; and a fan-shaped gear 54 that rotates the rotary shaft 59. The pinion gear 55 that meshes with the fan-shaped gear 54 to drive the fan-shaped gear 54, the electric motor 21 as an actuator to which the pinion gear 55 is attached, the swing links 53, 63, and the clutch arms 52, 62, respectively. Interlocking rods 56 and 66 and stroke absorbing springs 57 and 67 to be connected are provided.

  The operation structure for turning on and off the threshing clutch 14 is as follows. As shown in FIGS. 10 and 11, when the clutch operation lever 20 is operated from the clutch disengagement operation position OFF toward the both clutch engagement operation position ON2, the clutch operation lever 20 is moved to the threshing clutch engagement operation position ON1 (FIG. 11 (a). ) See)), the detent mechanism 25 is deactivated by the action of the through mechanism 45, but the switch piece 43a of the threshing switch 43 is pressed against the first cam portion 42a of the clutch operating lever 20, and the threshing switch 43 enters and operates. When the threshing switch 43 is turned on and operated, the detection result is input to the control device 58, and the electric motor 21 is driven forward by the output from the control device 58 (the pinion 55 shown in FIGS. 3 and 4 rotates clockwise). Then, the clutch arm 53 is pulled up and the threshing clutch 14 is engaged (see FIG. 4). When the angle detector 22 detects that the rotary shaft 59 has rotated to the state shown in FIG. 4, the rotation of the electric motor 21 is stopped.

  When the clutch operation lever 20 is subsequently operated to the both clutch engagement operation position ON2, the detent mechanism 20 acts to position the clutch operation lever 20. The threshing switch 43 remains in the engaged state even when the threshing clutch entering operation position ON1 is changed to the both clutch entering operation position ON2, and when the clutch operating lever 20 is turned to the both clutch entering operation position ON2, the second cam portion of the clutch operating lever 20 is operated. The switch piece 44a of the cutting switch 44 is pressed to 42b, and the cutting switch 44 is turned on and operated. When the cutting switch 44 is turned on and operated, the detection result is input to the control device 58, and the electric motor 21 is further driven forward by the output from the control device 58, the clutch arm 62 is pulled up and the cutting clutch 19 is engaged (FIG. 5). reference). When the angle detector 22 detects that the rotary shaft 59 has rotated to the state of FIG. 5, the rotation of the electric motor 21 is stopped. Thereby, it will be in the state which can start cutting and threshing work.

  When the clutch operation lever 20 is operated from both clutch engagement operation positions ON2 toward the clutch disengagement operation position OFF, the through mechanism 45 is inactive, and the detent mechanism 25 is in the active state at the intermediate threshing clutch operation position ON1. .

  As shown in FIGS. 12, 13 (a) and 13 (b), when the clutch operating lever 20 is operated from the both clutch engagement operation position ON 2 to the threshing clutch engagement operation position ON 1, the cam member 46 is from the middle notch 31. Since the engagement cylinder 32 of the detent mechanism 25 is engaged with the intermediate notch 31 (see FIG. 13A). Thereby, since the operation force for moving the clutch operation lever 20 is increased, the operator can feel that the clutch operation lever 20 has been operated to the operation position ON1 with the threshing clutch. Therefore, when the operator wants to keep only the threshing clutch 14 in the engaged state with the cutting clutch 19 turned off, the operator has operated the clutch operating lever 20 to the threshing clutch engaged operation position ON1. Thus, by releasing the hand from the clutch operation lever 20, it can be set at the operation position ON1 with the threshing clutch.

  The operator performs pillow handling by driving only the threshing unit 3 from the state before starting the work where the clutch operating lever 20 is located at the clutch disengagement operation position OFF, with the traveling of the airframe and the cutting unit 2 stopped. When desired, the clutch operating lever 20 is temporarily operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2, and then the clutch operation lever 20 is returned to the position of the threshing clutch engagement operation position ON1, thereby cutting. Pillow handling operation can be performed with the clutch 19 disengaged and the threshing clutch 14 only engaged.

  In this embodiment, the cam member 46 of the through mechanism 45 is separated from the engaging cylinder 32 immediately before being set to the both clutch engagement operation position ON2, and at this time, the switch piece 44a of the cutting switch 44 is moved to the clutch operation lever 20. Since the reaping clutch 19 is not yet in the engaged state even though it is in contact with or in contact with the second cam surface 42b, only the threshing clutch 14 is brought into the engaged state without operating the reaping portion 2. can do.

When the clutch operating lever 20 and the clutch arm 62 that operates the tension wheel 61 are mechanically linked by a link, a wire, or the like, the cutting clutch 19 is operated to the clutch engagement operating position ON 2. However, in this embodiment, the electric motor 21 is driven on the basis of a detection signal from the cutting switch 44 so that the pinion gear is driven. 55, the fan-shaped gear 54 is operated and the clutch arm 62 is operated via the interlocking rod 66, so that the cutting clutch 19 is engaged. Therefore, after the clutch operating lever 20 is set to the both clutch engaging operation position ON2, The reaping clutch 19 enters after the time lag.
Therefore, in this embodiment, when the pillow is handled from the beginning, even if the clutch operation lever 20 is operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2, the operation of the threshing clutch engagement operation position ON1 is quickly performed. When the direction is slightly returned, the reaping clutch 19 is not engaged, and then the threshing clutch 14 can be brought into the engaged state by gradually setting the clutch operating lever 20 to the threshing clutch entering operation position ON1.

  When the clutch operating lever 20 is operated from the threshing clutch entering operation position ON1 to the clutch disengaging operation position OFF, if the clutch operating lever 20 is operated from the threshing clutch entering operation position ON1 toward the clutch disengaging operation position OFF, the detent mechanism 25 The engagement cylinder 32 presses the second cam surface 46b of the through mechanism 45 to swing the cam member 46 and pass through it, so that the clutch operation lever 20 can be returned to the clutch disengagement operation position OFF. At this position, the engaging cylinder 32 is engaged with the notch 31 and the operating force of the clutch operating lever 20 is increased, so that the clutch operating lever 20 is turned off the clutch disengaging operation position without looking at the clutch operating lever 20. You can feel the location.

[Another embodiment]
(1) In the above-described embodiment, the through mechanism 45 acts on the forward path in which the clutch operating lever 20 is operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2, and the clutch operation lever 20 is moved from the both clutch engagement operation position ON2. In the return path operated to the clutch disengagement operation position OFF, the through mechanism 45 is in an inoperative state and the detent mechanism 25 functions in the return path. However, as shown in FIG. A through member 45a that hides the intermediate notch 31 corresponding to the clutch operating position ON1 is provided, and the operating posture shown in FIG. 15 (a) and the non-operating posture shown in FIG. You may comprise so that it can switch to. In this way, by operating the through member 45a to the operating posture, the through mechanism 45 is operated by both the forward and backward operations of the clutch operating lever 20, and the through member 45a is retracted above the notch 31. By operating in the non-acting posture, the clutch operating lever 20 can be held in position by the detent mechanism 25 at the operation position ON1 with the threshing clutch in both forward and backward operations of the clutch operating lever 20. Therefore, in this case, when the pillow handling operation is performed, the through member 45a is operated to the non-acting posture so that the clutch operating lever 20 is temporarily operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2. The clutch operating lever 20 can be positioned by operating directly from the clutch disengagement operation position OFF to the threshing clutch engagement operation position NO1.

(2) In the main embodiment, the through mechanism 45 (cam member 46) acts on the forward path in which the clutch operating lever 20 is operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2, and the both clutch engagement operation position. The through mechanism 45 (cam member 46) does not act during the return path to operate from the ON2 to the clutch disengagement operation position OFF, and the detent mechanism 25 at the threshing clutch engagement operation position ON1 functions to operate the clutch operation lever 20 to engage the threshing clutch. Although a configuration is shown in which the position can be reliably operated to the position ON1, the cam member 46 and the like in FIGS. As a result, the through mechanism 45 (cam member 46) becomes inactive during the forward path in which the clutch operating lever 20 is operated from the clutch disengagement operation position OFF to the both clutch engagement operation position ON2, and the threshing clutch engagement operation on the intermediate path is performed. The detent mechanism 25 functions at the position ON1, and the clutch operation lever 20 can be positioned to the operation position ON1 with the threshing clutch. The through mechanism 45 (cam member 46) acts during the return path in which the clutch disengagement operation position ON2 is operated from both clutch engagement operation positions ON2, and the detent mechanism 25 does not act at the threshing clutch engagement operation position. It is possible to smoothly operate the clutch release operation position OFF.

  In short, at least one of the operation from the clutch disengagement operation position OFF of the clutch operation lever 20 to the both clutch engagement operation position ON2 and the operation from the both clutch engagement operation position ON2 to the clutch disengagement operation position OFF, When the clutch operating lever 20 is positioned at the threshing clutch entering operation position ON1, a through mechanism 45 that does not engage the engaging portion 32 with the engaged portion 31 can be provided.

  The present invention can be applied not only to a self-removing combine but also to an ordinary combine.

2 Cutting part 3 Threshing part 14 Threshing clutch 19 Cutting clutch 20 Clutch operating lever 25 Detent mechanism 31 Engaged part (notch)
32 Engagement part (engagement cylinder)
44 Cutting switch 45 Through mechanism 46 Cam member 47 Spring OFF Clutch disengagement operation position ON1 Threshing clutch engagement operation position ON2 Both clutch engagement operation position

Claims (3)

A reaping clutch for intermittently connecting the drive system of the reaping part and a threshing clutch for intermittently connecting the drive system of the threshing part. When one clutch operating lever is operated to the clutch disengagement operation position, both the reaping clutch and the threshing clutch are disengaged. When the operation is performed to the operation position including the threshing clutch, only the threshing clutch is engaged with the cutting clutch in the disengaged state, and both the clutch of the threshing clutch and the harvesting clutch are engaged when operated to the operation position including both clutches. In a combine that is configured to be
The clutch disengagement operation position, the threshing clutch engagement operation position, and the both clutch engagement operation positions are arranged on one straight line,
A detent that holds the clutch operation lever by engaging the engaged portion with the engaged portion when the clutch operating lever is located at the clutch disengagement operation position, the threshing clutch engagement operation position, and both clutch engagement operation positions. With the mechanism,
The clutch operation during at least one of the operation of the clutch operation lever from the clutch disengagement operation position to the both clutch engagement operation position and the operation from the both clutch engagement operation position to the clutch disengagement operation position. A combine mechanism provided with a through mechanism that does not engage the engaging portion with the engaged portion even when a lever is positioned at the operation position with the threshing clutch.   The through mechanism is an operation of either one of the operation of the clutch operation lever from the clutch disengagement operation position to the both clutch engagement operation position or the operation from the both clutch engagement operation position to the clutch disengagement operation position. At this time, even if the clutch operating lever is located at the operation position with the threshing clutch, the cam for retracting the engaging portion with respect to the engaged portion so that the engaging portion does not engage with the engaged portion. The combine of Claim 1 provided with the member.   When the clutch operation lever is operated from the clutch disengagement operation position to the both clutch engagement operation position, the engagement portion is engaged with the engaged portion even if the clutch operation lever is located at the threshing clutch engagement operation position. In addition, when the clutch operation lever is operated from the both clutch engagement operation position to the clutch disengagement operation position, when the clutch operation lever is positioned at the threshing clutch engagement operation position, the engagement portion is engaged with the engaged portion. The combine according to claim 1 or 2, wherein the through mechanism is configured to be engaged with the combiner.

Images