JP4811981B2 - Clutch operating device for combine - Google Patents

Description

The present invention relates to a clutch operating device in a combine that turns on and off a first tension clutch and a second tension clutch in a predetermined order by driving a motor.

The first tension clutch and the second tension clutch are linked to each other via a linkage member, and these linkage members are operated by driving the motor to turn the first tension clutch and the second tension clutch on / off in a predetermined order. There is known a clutch operating device for a combine that is made to operate (see Patent Document 1). For example, the clutch operating device described in Patent Document 1 is applied to a combine, and is configured to turn ON / OFF a mowing clutch and a threshing clutch by a single motor drive. According to such a configuration, it is possible not only to reduce the operator's clutch operation load compared to when both clutches are operated manually, but also to automatically turn on / off the reaping clutch and the threshing clutch according to the work situation. Is possible.

  However, the clutch operating device described in Patent Document 1 includes two rotating members (arms) to which the connecting members are connected, and is configured to sequentially rotate these rotating members with a cam. There is a problem that not only the number of parts increases but the cost increases, and the apparatus becomes large.

The present invention has been created in order to solve these problems in view of the above-described circumstances, and a reaping clutch and a threshing clutch each comprising a tension clutch having a tension arm for tensioning or relaxing a transmission belt. The reaping clutch and the threshing clutch are connected to each other via connecting members, and the linking clutch is operated by rotating the tension arm in the tension direction by pulling the connecting members by driving a motor. In the clutch operating device in the combine configured to switch the threshing clutch from OFF to ON, a reaping clutch connecting member with respect to a single rotating member that rotates according to the driving of the motor configured by a sector gear and interlocking member for threshing clutch connected respectively, the intermediate position from the initial position of the rotating member The rotation of the while maintaining the OFF state of the reaper clutch, while causing ON only threshing clutch draw for threshing clutch interlocking member, by the rotation of the intermediate position of the rotating member to the end position, the retraction of the threshing clutch When the cutting clutch is turned on while the ON state is maintained , the amount of rotation of the rotating member from the intermediate position to the end position is made smaller than the amount of rotation from the initial position to the intermediate position, and the cutting is performed. The ON state of the threshing clutch when the clutch is turned on is maintained when the connecting member for the threshing clutch exceeds the fulcrum of the turning center of the turning member as the turning member moves from the intermediate position to the end position. A bracket for rotatably supporting the rotating member, and a position for detecting the rotation position of the motor and the rotating member on the bracket. A clutch operating device in a combine, wherein the integrally provided on the Nshometa. If comprised in this way, since a cutting tension clutch and a threshing tension clutch can be turned on / off in a predetermined order by a single rotating member, not only can the number of parts be reduced and the cost can be reduced, The apparatus can be miniaturized. And it can maintain the ON state by pulling in the threshing tension clutch without using a complicated mechanism.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a combine, and the combine 1 includes a pre-processing unit 2 that cuts stem stalks, a threshing unit 3 that threshs the grains from the cutting stalks, and selects the kernels. A grain tank 4 for storing the grains, a post-processing unit 5 for processing the threshed waste, an operation unit 6 provided with various operation tools, and a crawler type traveling unit 7. ing.

  The pre-processing unit 2 includes a divider 8 for weeding the uncut stem culm, an elevating device (not shown) for causing the weed stalk culm, and a cutting blade device for cutting the stock position of the stalk culm ( (Not shown) and a pre-processing support device (not shown) configured to convey the mowing stem pods toward the threshing unit 3, and is erected on the left front end of the body frame 9. 10 is supported so as to be movable up and down.

  The threshing unit 3 includes a handling chamber (not shown) that houses the handling cylinder 11, a threshing feed chain 12 that conveys stems along the handling chamber, and a sorting chamber (not shown) that sorts the threshed grains. ), And a milling cylinder 13 that lifts and conveys the selected grain to the grain tank 4, and a waste transporting device (not shown) that transports the threshed waste toward the post-processing unit 5. And is mounted on the left side of the fuselage frame 9. The whipping cylinder 13 is erected along the side surface of the threshing unit 3 on the machine body center side, and is firmly fixed to the threshing unit 3.

  The grain tank 4 is configured to store the grain sent from the whipping cylinder 13 and to carry the stored grain out of the machine via an auger (not shown). In the present embodiment, when the grain tank 4 is mounted on the right side of the machine frame 9, the rear end side can be retracted and rotated outward from the machine body. If comprised in this way, the right side upper part of the body frame 9 will be open | released widely by retreating and turning the grain tank 4 outward of a body, and the maintenance of a machine body center part will become easy.

  An engine E that supplies power to the preprocessing unit 2, the threshing unit 3, the grain tank 4, the traveling unit 7, and the threshing feed chain 12 is mounted below the operation unit 6. As shown in FIG. 2, the grain tank 4 inputs engine power via an engine pulley 14, a transmission belt 15 and a tank input pulley 16, and operates a spiral conveyance body (not shown) in the tank with this power. Let The power of the traveling unit 7 is transmitted to the transmission case 19 via the engine pulley 14, the transmission belt 17, and the transmission input pulley 18, and is shifted by a traveling continuously variable transmission (HST) 20 or the like built in the transmission case 19. Then, it is transmitted to the drive wheel 7a of the traveling unit 7.

  The power of the threshing unit 3 is once transmitted to the input shaft 24 of the gear case 23 to be described later via the engine pulley 14, the work machine transmission belt 21 and the gear case input pulley 22, and from here the counter pulley 25, the threshing transmission belt 26 and the threshing. It is transmitted to the threshing unit 3 through the input pulley 27. This power is transmitted to the swing sorter 29 in the sorting chamber via the rod shaft 28 and also to the handling cylinder 11 via the threshing power transmission mechanism 30. The threshing power transmission mechanism 30 includes a counter pulley 31, a transmission belt 32, and a handling cylinder input pulley 33, and is arranged in the vertical direction with a predetermined interval in front of the whipping cylinder 13.

  The gear case 23 is configured to continuously change engine power input from the input shaft 24 with a preprocessing continuously variable transmission (HST) 34 and supply the power to the preprocessing unit 2 and the threshing feed chain 12. . Thereby, the stalk conveyance speed of the pre-processing part 2 and the threshing feed chain 12 is synchronized, and the conveyance disorder in a takeover part is prevented. The pre-processing continuously variable transmission 34 includes an HST pump (swash plate type variable displacement hydraulic pump) 35 and an HST motor (fixed displacement hydraulic motor) 36 driven by the oil discharged from the HST pump 35. The engine power can be steplessly changed according to the operation of the swash plate of the HST pump 35. The continuously-processed preprocessing power is output from the preprocessing output shaft 37 of the gear case 23. The preprocessing output shaft 37 is provided with an output pulley 38, from which power is supplied to the preprocessing unit 2 via the preprocessing transmission belt 39 and the preprocessing input pulley 40.

  The gear case 23 is rotatably provided with two tension arms 41 and 42 constituting a work system clutch. The first tension arm 41 is for constituting a reaping clutch mechanism 43 (first tension clutch). By rotating the first tension arm 41, the pre-processing transmission belt 39 is tensioned or relaxed, and power is supplied to the pre-processing unit 2. / Cut off. Further, the second tension arm 42 is for constituting a threshing clutch mechanism 44 (second tension clutch). By rotating the second tension arm 42, the work machine transmission belt 21 is tensioned or relaxed to supply power to the threshing unit 3 or the like. Turn on / off.

  As shown in FIG. 4, the base end portion of the first tension arm 41 is connected to the clutch operating device 46 via a wire 45 (first tension clutch connecting member), and the base end of the second tension arm 42 is also connected. The portion is linked to the clutch operating device 46 via a wire 47 (second tension clutch linkage member). The clutch operating device 46 includes a single electric motor 48, and pulls the wires 45 and 47 with the driving force to enter and operate the tension arms 41 and 42.

  The operation unit 6 is provided with a work system clutch lever 49 that is used for both on / off operation of the reaping clutch 43 and the threshing clutch 44. As shown in FIG. 3, the work system clutch lever 49 is supported so as to be rotatable forward and backward with a lever support shaft 50 as a fulcrum, and has a cam portion 49 a at the base end portion. Two lever position detection switches 51 and 52 are provided at positions facing the cam portion 49a, and the operation position of the work system clutch lever 49 is detected by these lever position detection switches 51 and 52. That is, in the first operation position where both clutch mechanisms 43 and 44 are turned off, both lever position detection switches 51 and 52 are OFF, but in the second operation position where only the threshing clutch mechanism 44 is turned on, the cam Only the first lever position detection switch 51 is turned ON by the portion 49a. In the third operation position where both clutch mechanisms 43 and 44 are engaged, both lever position detection switches 51 and 52 are turned ON by the cam portion 49a. As a result, the position of the work system clutch lever 49 can be detected electrically and the clutch operating device 46 can be operated.

  Hereinafter, a first embodiment of the clutch operating device 46 will be described with reference to FIGS. As shown in these figures, the clutch operating device 46 is pivotable to the bracket 53 that is fixed to the cereal milling cylinder 13, a single electric motor 48 that is provided integrally with the bracket 53, and the bracket 53. A sector gear (rotating member) 54 that is supported and meshed with the output gear 48 a of the electric motor 48, a potentiometer 55 that detects the rotating position of the sector gear 54, and a limit switch 56 that detects the initial position of the sector gear 54. Configured. The wires 45 and 47 of both the clutch mechanisms 43 and 44 described above are connected to the sector gear 54 from different directions, and are drawn / drawn according to the rotation of the sector gear 54. Reference numerals 53a and 53b denote outer receivers for locking the outer 45a and 47a of the wires 45 and 47, respectively.

  The sector gear 54 is controlled to rotate to an initial position shown in FIG. 7, an intermediate position shown in FIG. 8, and a terminal position shown in FIG. The wire 45 of the mowing clutch mechanism 43 is in the extended state (clutch OFF state) at the initial position and the intermediate position of the sector gear 54, and is retracted (clutch ON state) when the sector gear 54 is at the end position. A connection direction and a connection position are set. More specifically, when the sector gear 54 rotates from the initial position to the intermediate position, the wire 45 passes over the rotation center of the sector gear 54, so that the state in which the wire 45 is extended is maintained, and the sector gear 54 is in the intermediate position. When turning from the position to the end position, the wire 45 is drawn.

  On the other hand, the wire 47 of the threshing clutch mechanism 44 is in the extended state (clutch OFF state) when the sector gear 54 is in the initial position, and is in the retracted state (clutch ON state) at the intermediate position and the end position of the sector gear 54. The connection direction and the connection position with respect to 54 are set. More specifically, when the sector gear 54 rotates from the initial position to the intermediate position, the wire 47 is pulled. However, when the sector gear 54 rotates from the intermediate position to the end position, the wire 47 rotates the sector gear 54. By pulling the fulcrum beyond the center of movement, no further retraction is performed.

  Next, the operation of the clutch operating device 46 according to the operation of the work system clutch lever 49 will be described. When the work system clutch lever 49 is in the first operation position, the sector gear 54 is controlled to rotate to the initial position. In this state, since both the wires 45 and 46 are in the extended state, the reaping clutch 43 and the threshing clutch 44 are turned off.

  When the work system clutch lever 49 is operated from the first operation position to the second operation position, the sector gear 54 is rotationally controlled from the initial position to the intermediate position. At this time, the wire 45 is maintained in the drawn-out state by exceeding the fulcrum described above, and only the wire 47 is drawn. Thereby, only the threshing clutch 44 can be turned on while maintaining the cutting clutch 43 OFF.

  When the work system clutch lever 49 is operated from the second operation position to the third operation position, the sector gear 54 is controlled to rotate from the intermediate position to the end position. At this time, the wire 47 is maintained in the extended state by exceeding the fulcrum described above, and only the wire 45 is drawn. Thereby, the mowing clutch 43 can be turned on while the threshing clutch 44 is kept on. Further, when the wire 47 exceeds the fulcrum, the pulling load acts in the direction in which the sector gear 54 is advanced, so that the pulling load of the wire 45 can be reduced. When the work system clutch lever 49 is operated from the third operation position to the second operation position, or when the work system clutch lever 49 is operated from the second operation position to the first operation position, the reverse operation is performed. .

  The combine 1 of the present embodiment configured as described is connected to a mowing clutch mechanism 43 and a threshing clutch mechanism 44, which are tension clutches, via wires 45 and 47, respectively, and these wires 45 and 47 are connected to an electric motor 48. And a clutch operating device 46 that turns on and off the mowing clutch mechanism 43 and the threshing clutch mechanism 44 in a predetermined order. The clutch operating device 46 connects wires 45 and 47 from different directions to a single sector gear 54 that rotates in accordance with the driving of the electric motor 48, and rotates the sector gear 54 from an initial position to an intermediate position. By moving, only the threshing clutch mechanism 44 is turned on while maintaining the OFF of the chopping clutch mechanism 43, and the cutting clutch clutch 44 is kept ON by turning the sector gear 54 from the intermediate position to the end position. The mechanism 43 is turned on. Thus, the cutting clutch mechanism 43 and the threshing clutch mechanism 44 can be turned on / off in a predetermined order by the single sector gear 54. As a result, the number of parts can be reduced and the cost can be reduced. Can be miniaturized.

  Further, since the wire 45 is moved beyond the fulcrum when the mowing clutch mechanism 43 is kept off, the mowing clutch mechanism 43 can be kept off without using a complicated mechanism.

  Further, when the threshing clutch 44 is kept on, the wire 47 is moved beyond the fulcrum, so that the threshing clutch mechanism 44 can be kept on without using a complicated mechanism, and the retraction load of the wire 47 is reversed and the cutting is performed. The ON operation load of the clutch 43 can be reduced.

  Next, a clutch operating device 60 according to a second embodiment of the present invention will be described with reference to FIG. However, about the same structure as 1st embodiment, the same code | symbol as 1st embodiment is attached | subjected and description of 1st embodiment is used.

  The clutch operating device 60 according to the second embodiment is provided with a guide pin (guide portion) 61 for bending and guiding the wire 47 at the rotation center portion of the sector gear 54 when the threshing clutch mechanism 44 is kept ON. This is different from the embodiment. That is, when the sector gear 54 is rotated from the intermediate position to the end position, the wire 47 is entangled with the guide pin 61 in the middle thereof, and further pull-in is restricted. Thereby, ON of the threshing clutch mechanism 44 can be maintained, without using a complicated mechanism. Also, with this configuration, the settable range is widened when setting the end position of the sector gear 54, so that the pull-in amount of the wire 45 can be optimized.

It is a partially cutaway right view of a combine. It is a transmission circuit diagram which shows the power transmission structure of a combine. (A)-(C) are explanatory drawings which show the operation position of a working system clutch lever. It is explanatory drawing which shows a clutch operating device, a mowing clutch mechanism, and a threshing clutch mechanism. It is a front side perspective view of a clutch operating device. It is a back side perspective view of a clutch operating device. It is a front view of the clutch operating device with the sector gear as the initial position. It is a front view of the clutch operating device which made the sector gear an intermediate position. It is a front view of the clutch operating device with the sector gear as the terminal position. It is operation | movement explanatory drawing of a clutch operating device. It is action | operation explanatory drawing of the clutch operation apparatus which shows another example.

Explanation of symbols

1 Combine 43 Mowing clutch mechanism 44 Threshing clutch mechanism 45 Wire 46 Clutch operating device 47 Wire 48 Electric motor 49 Work system clutch lever 54 Sector gear 60 Clutch operating device 61 Guide pin

Claims (1)

A reaping clutch (43) and a threshing clutch (44), each of which includes a tension clutch having a tension arm (41, 42) that tensions or relaxes the transmission belt (21, 39), the reaping clutch (43) and the threshing The tension of the tension arm (41, 42) is connected to the clutch (44) via connecting members (45, 47), respectively, and these connecting members (45, 47) are pulled by driving the motor (48). Drive of the motor (48) composed of sector gears in a clutch operating device in a combiner configured to switch the cutting clutch (43) and the threshing clutch (44) from OFF to ON by rotating in the direction In response to a single rotating member (54) that rotates in response to the chopping clutch connecting member (45) and threshing clutch. Use interlocking member (47) and respectively connected, by the rotation from the initial position of the rotating member (54) to an intermediate position, while maintaining the OFF state of the clutch (43) Reaper, for threshing clutch interlocking member (47) While only the retraction threshing clutch (44) is turned ON, the reaping clutch (43) is maintained while the ON state by the retraction of the threshing clutch (44) is maintained by the rotation of the rotation member (54) from the intermediate position to the end position. ) Is turned on, the turning amount of the turning member (54) from the intermediate position to the end position is made smaller than the turning amount from the initial position to the intermediate position, and the cutting clutch (43) is turned on. When the threshing clutch (44) is kept in the ON state, the threshing clutch connecting member (47) rotates as the rotating member (54) rotates from the intermediate position to the end position. A bracket (53) is provided to support the rotating member (54) so that the rotating member (54) can freely rotate, and the motor ( 48) and a potentiometer (55) for detecting the rotational position of the rotational member (54) are integrally provided.

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