JP2005253411A - Structure for driving pretreatment of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent changing over of a pretreatment part to non-interlocking during high-speed reaping operation and to perform smooth reaping and harvesting operation in a combine harvester changing over the speed of the pretreatment part to a traveling speed in an interlocking or a non-interlocking manner. <P>SOLUTION: The combine harvester is equipped with a speed interlocking means for changing the driving speed of the pretreatment part 2 interlockingly with the traveling speed. The combine harvester is further provided with a constant speed control means for maintaining the driving speed of the pretreatment part 2 constant irrespectively of a change in the traveling speed, a manual operation means 12a for operating the constant speed control means and a restraining means for permitting the operation of the constant speed control means only when the traveling speed or the driving speed of the pretreatment part 2 is not higher than a prescribed speed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drive structure for a combine pretreatment device.

2. Description of the Related Art Conventionally, in this type of combine, a technique is already known in which the driving speed of the preprocessing unit is linked to the traveling speed, and the driving speed of the preprocessing unit increases as the traveling speed increases.
In addition, the driving speed of the pre-processing unit is linked to the change in the traveling speed, the standard speed control that increases the driving speed of the pre-processing unit as the traveling speed increases, and the constant speed that keeps constant regardless of the change in the traveling speed. The technique of the pre-processing control apparatus provided with the means to switch to control is also well-known (for example, refer patent document 1).
Japanese Patent Laying-Open No. 2003-199418 (pages 2 and 3, FIGS. 4 to 6)

Normally, switching to the constant speed control that keeps the preprocessing speed constant regardless of changes in the traveling speed of the combine machine is performed when it is desired to continue the feeding of the preprocessing unit when the machine is stopped. However, in the conventionally known Patent Document 1 described above, if the accidental switching to the forced scraping state is performed during the cutting operation in the high speed state, the driving speed of the preprocessing unit decreases to a constant speed. Therefore, the pre-processing drive speed corresponding to high-speed mowing work, i.e., the chopping and picking speed, cannot be obtained, and the engine load becomes excessive due to insufficient pre-processing drive speed, resulting in a decrease in output, This causes problems such as the occurrence of uncut leaves and clogging of the cereals in the pre-processing unit, and the failure of the machine.
An object of the present invention is to improve such conventional problems.

  In order to achieve the above object, the present invention includes a traveling transmission system A that transmits the output from the engine to the traveling devices 9 and 9 and a preprocessing transmission system B that transmits the output to the preprocessing section, In a combine provided with speed interlocking means for changing the driving speed of the unit 2 in conjunction with the traveling speed, constant speed control means for holding the driving speed of the preprocessing unit 2 constant regardless of the change of the traveling speed, The manual operation means 12a for operating the constant speed control means and the check means for allowing the operation of the constant speed control means only when the traveling speed or the driving speed of the preprocessing unit 2 is equal to or lower than a predetermined speed are provided.

In a combine provided with a speed interlocking unit that changes the driving speed of the preprocessing unit 2 in conjunction with the traveling speed, a constant speed control unit that keeps the driving speed of the preprocessing unit 2 constant regardless of changes in the traveling speed; Since the checking means that allows the operation of the constant speed control means is provided only when the traveling speed or the driving speed of the preprocessing unit 2 is equal to or less than the predetermined speed, the operator can perform the cutting work at high speed during the harvesting and harvesting work in the combine. Even if the constant speed control means is erroneously activated during the operation, the constant speed control means does not operate and the driving speed of the preprocessing unit 2 is not switched to the predetermined speed. The scooping conveying speed is maintained at a driving speed corresponding to the high speed traveling speed.
Therefore, the engine load becomes excessive due to insufficient driving speed of the preprocessing unit 2 and the output is reduced. There is no longer a situation where the clogging of the cocoon occurs and the machine breaks down, and a smooth cutting and harvesting operation is possible.

Embodiments of the present invention will be described below with reference to the drawings.
1 (a) is an overall side view of a combine equipped with the device of the present invention, FIG. 1 (b) is a perspective view of an essential part in the operating cabin, and FIG. 2 (a) is an essential part of a main transmission lever. FIG. 2B is a front view of the same.
In FIG. 1 (a), 1 is a traveling machine body, 2 is a pre-processing unit that is provided on the front part of the traveling machine body 1 and can be moved up and down, and 3 is a machine body frame. The engine 4 and the grain tank 6 are provided in the cabin 4, the rear part thereof, and the threshing device is provided on the opposite side (not shown), the straw processing device 7 and the like are provided in the rear part thereof, and the grain discharge auger 8 is provided in the upper part. Further, traveling devices 9 and 9 made of left and right crawlers are respectively provided at the lower part of the traveling machine body 1.

  Further, in FIG. 1B, on the left side of the driver's seat 11 provided in the driving cabin 4 is a forced take-in switch 12a (manual operation means) composed of a momentary switch described later (see FIG. 2) and a lodging material. A main transmission lever 13 having a switch 12b and a grip portion 13a is provided, and a sub transmission lever 14 is provided on the rear side of the main transmission lever 13, and these main and sub transmission levers 13, 14 are provided. The speed change operation of the traveling machine body 1 is performed by the combination speed change operation.

Further, FIG. 3 is a power transmission system diagram. The drive shaft 5a of the engine 5 is provided with two pulleys 15 and 16 for taking out the output. The output is branched and output to a traveling transmission system A that transmits to the traveling HST 17 (traveling transmission) via the pulley 15 and a preprocessing transmission system B that transmits to the handle cylinder input shaft 18 via the other pulley 16. .
Then, the driving force for the left and right traveling devices is shifted and output from the traveling transmission 19 including the traveling HST 17 so as to perform the shifting traveling and the lateral steering when the traveling machine body 1 goes straight, and the pulley 16 And a pulley 21 attached to the cylinder input shaft 18 is wound with a belt 22 for transmitting a driving force, and a threshing that forms a tension clutch structure provided at a winding intermediate portion of the belt 22. The connecting / disconnecting operation of the driving force transmitted to the preprocessing transmission system B via the clutch 23 is performed.

  Here, the driving force to the pretreatment transmission system B is transmitted to the input pulley 27 of the work machine HST26 (pretreatment transmission) constituting the work machine transmission 25 via the barrel input shaft 18 and the pulley 24. The driving force from the work machine transmission 25 is branched and output to the transmission system B1 to the pretreatment unit 2 and the transmission system B2 to the threshing feed chain 28.

  The work machine transmission 25 has two output shafts, a preprocessing output shaft 29 for driving force output to the preprocessing unit 2 and a feed chain output shaft 30 for driving force output to the threshing feed chain 28. The threshing feed chain 28 is driven via a sprocket 31 provided on the end side of the feed chain output shaft 30, and the handling cylinder 32 is connected to the handling cylinder input shaft 18 via a bevel gear 33. Driven.

  On the other hand, the preprocessing unit 2 includes a cutting blade device 35, a pulling device 36, a cereal conveying device 37, and the like, and the transmission of the driving force to the preprocessing unit 2 is an input shaft 38 of the driving force on the preprocessing unit 2 side. And a transmission belt 41 wound around the pulley 39 attached to the preprocessing output shaft 29 and a driving force is input to the input shaft 38. The transmission system B1 to the pre-processing unit 2 has a structure in which each of the mechanisms is driven at a driving speed corresponding to the rotational speed (speed) of the driving force. A cutting clutch 42 having a tension clutch structure for connecting / disconnecting transmission of driving force to the shaft 38 is provided, and power is connected / disconnected by turning on / off a cutting clutch switch (not shown) provided in the driver's seat 11. .

Next, the control configuration of the pretreatment transmission system B including the traveling transmission system A, the transmission system B1 to the pretreatment unit 2, and the transmission system B2 to the threshing feed chain 28 will be described.
First, an engine rotation sensor S1 for detecting the rotational speed of the engine 5 is attached to the drive shaft 5a of the engine 5 that outputs a driving force to each of the transmission systems A and B (B1, B2). To the traveling HST 17 of the traveling transmission 19. Then, the rotation speed of the traveling HST 17 is changed by operating the main transmission lever 13 provided in the traveling transmission system A, and the driving force from the traveling HST 17 travels from the auxiliary transmission output shaft 44 to the left and right via the auxiliary transmission mechanism 43. The transmission 9 is transmitted to shift the traveling speed of the traveling machine body 1. A transmission rotation detection sensor S2 is attached to the auxiliary transmission output shaft 44 so that the rotational speed of the auxiliary transmission output shaft 44 ( The main transmission lever 13 is provided with a main transmission potentiometer P1 for detecting a switching position of the main transmission lever 13.

  Further, a motor M1 as an actuator for operating the swash plate angle to perform a speed change operation of the work machine HST26 is attached to a trunnion shaft (not shown) of the work machine HST26 constituting the preprocessing transmission system B. At the same time, the preprocessing output shaft 29 of the work machine transmission 25 is provided with a preprocessing rotation detection sensor S3 for detecting the rotation speed (preprocessing rotation speed) of the preprocessing output shaft 29. Further, the cutting clutch 42 Is provided with a preprocessing clutch motor M2 for operating the cutting clutch 42 to be turned on and off, and is configured to control turning on and off of the cutting clutch 42 by the preprocessing clutch motor M2.

Next, FIG. 4 is a connection control diagram of each sensor and switches. The forced take-in switch 12a and the lodging material switch 12b provided on the main transmission lever 13, the transmission rotation detection sensor S2, and the preprocess rotation detection. Each of the sensors S3 is connected to the control unit 46, and controls the motor M1 that performs a shifting operation of the work machine HST26 via the control unit 46 to control the driving speed of the preprocessing unit 2, that is, preprocessing driving. It comes to perform control.
Reference numeral 47 denotes a lodging material switch lamp which is turned on when the lodging material switch 12b is turned on.

  FIG. 5 is a flowchart of the pre-processing drive control, and FIG. 6 is a graph showing the relationship between the traveling speed of the traveling machine 1 and the pre-processing rotation speed (driving speed). First, the transmission rotation detection sensor S2 The transmission rotational speed a (traveling speed) is read by, and the rotational speed of the preprocessing output shaft 29 (driving speed of the preprocessing unit 2) is read by the preprocessing rotation detection sensor S3. Next, it is determined whether the lodging switch 12b is ON or OFF. If it is OFF, the standard setting is made (C = k1 · a where C is the pre-processing rotation target value and the coefficient is k1). The lodging is set so that the driving speed of the pre-processing unit 2 is increased as compared with the standard setting (C = k2 · a, where k2 is a coefficient). The coefficients have a relationship of k1 <k2.

  Next, it is determined whether the forced take-in switch 12a is ON or OFF, and when it is OFF, the rotation of the work implement HST26 is controlled to become the preprocessing rotation target value C, and the traveling speed and the preprocessing unit 2 are controlled. The driving speed (pre-processing rotation speed) is operated with “standard setting” or “slipping setting” that is linked so that the driving speed of the pre-processing unit 2 increases as the traveling speed increases. That is, as described above, speed interlocking means for changing the driving speed of the preprocessing unit 2 in conjunction with the traveling speed is provided.

On the other hand, when the forced take-in switch 12a is ON, it is determined whether the preprocess rotation target value C is smaller than a predetermined constant speed set value C0 (predetermined speed). That is, by comparing the preprocessing rotation target value C and the constant speed setting value C0, it is determined whether the traveling speed or the driving speed of the preprocessing unit 2 is equal to or lower than a predetermined speed. When “constant speed set value C0 ≧ pre-processing rotation target value C” is satisfied, work implement HST26 that shifts the drive speed of pre-processing unit 2 maintains constant rotation (constant speed setting value C0), that is, “constant speed setting value C0”. The speed is set, and the driving speed of the preprocessing unit 2 is maintained at a constant speed K shown in FIG. 6 regardless of the traveling speed. On the other hand, when “constant speed set value C0 <pre-processing rotation target value C”, the driving speed of the pre-processing unit 2 is controlled by the speed interlocking means in the same manner as when the forced take-in switch 12a is OFF. .
That is, as described above, the constant speed control means for keeping the driving speed of the preprocessing unit 2 constant regardless of the change in the traveling speed, and the constant speed only when the traveling speed or the driving speed of the preprocessing unit 2 is equal to or less than the predetermined speed. Checking means for allowing the operation of the control means is provided.

  Therefore, according to the device of the present invention, the load on the engine 5 is reduced even when the operator accidentally turns on the forced take-in switch 12a during the harvesting operation at a high speed during the harvesting and harvesting operation with the combine. A sudden overload causes the output to drop, or the pre-processing unit 2 pushes down the napped cereals to cause cutting residue, or the pre-processing unit 2 is clogged with cereals, causing the traveling machine 1 to malfunction. As a result, it is no longer necessary to interrupt the work, and a smooth cutting and harvesting work is always possible, so that the worker can concentrate on the cutting work with peace of mind.

  In the embodiment shown in FIG. 6, the traveling speed at which the check means operates or the driving speed of the preprocessing unit 2 is set so that the lodging switch 12b is OFF in the lodging mode in which the lodging switch 12b is ON. The constant speed K of the preprocessing unit 2 which is smaller than that in a certain standard material mode and is held by the constant speed control means is set to a constant value irrespective of ON / OFF of the lodging material switch 12b. For example, as shown in the graph of the other embodiment of FIG. 7, the traveling speed at which the restraining means operates or the driving speed of the preprocessing unit 2 depends on the lodging material mode and the standard. The same speed is set in the material mode, and the constant speeds K1 and K2 of the pretreatment unit 2 held by the constant speed control means may be set so that the case of the lodging material mode is larger than the case of the standard material mode. That.

(A) is the whole side view of a combine. (B) is a perspective view of the principal part in an operation cabin same as the above. (A) is a side view of the principal part of a main transmission lever. (B) is a front view of the same. It is a power transmission system diagram. It is a connection control figure of each sensor and switches. It is a flowchart figure of pre-processing drive control. It is a graph which shows the relationship between driving speed and pre-processing drive speed. It is a graph which shows the relationship between the travel speed of other embodiment, and pre-processing drive speed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Pre-processing part 5 Engine 9 Traveling apparatus 12a Forced take-in switch (manual operation means)
12b Lodging material switch 13 Main transmission lever 17 Traveling HST
23 Threshing clutch 26 Working machine HST
28 Threshing feed chain 42 Harvesting clutch 46 Control unit A Traveling transmission system B Preprocessing transmission system S1 Engine rotation sensor S2 Transmission rotation detection sensor S3 Preprocessing rotation detection sensor

Claims (1)

  A driving transmission system (A) that transmits the output from the engine to the traveling devices (9, 9) and a preprocessing transmission system (B) that transmits the output to the preprocessing section, and driving the preprocessing section (2). In a combine provided with speed interlocking means for changing the speed in conjunction with the traveling speed, a constant speed control means for maintaining the driving speed of the pre-processing unit (2) constant regardless of a change in the traveling speed, and the constant speed A manual operation means (12a) for operating the control means and a check means for allowing the constant speed control means to operate only when the traveling speed or the driving speed of the preprocessing unit (2) is equal to or lower than a predetermined speed are provided. Combined pre-processing drive structure.

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