JP2005180512A - Ground working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ground working vehicle, securing the interlocking operation of a transmission in a compact constitution without receiving such excessive working force as to cause bending of a support frame supporting a shifting lever of the transmission. <P>SOLUTION: This ground working vehicle comprises: working parts a, b mounted on a traveling machine frame to reap grain culms and beat out grain while traveling; a transmission device p for changing the supply power of a traveling system and a work system by tilting the shifting lever h; and brake devices r, r for intercepting the traveling system power received from the transmission device p by actuating a pedal and braking the traveling system. Further, the working vehicle is provided with a detecting means 12 for detecting the pedal actuation of the brake devices r, r and an actuator for tilting the shifting lever h of the transmission devices r, r to be returned to the neutral position in response to a detection signal received from the detecting means 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a ground work vehicle including a working unit that performs ground work such as harvesting of cereals while the aircraft is traveling.

  A ground work vehicle such as a combine that performs harvesting of cereals is known. The combine shown in Patent Document 1 is mounted on a machine body that can travel, and in addition to a working unit that performs reaping and threshing of the cereal while traveling, the traveling system and the power supplied to the working system are moved forward and backward by tilting the shift lever. It is configured to include a hydrostatic continuously variable transmission that is abbreviated as HST that performs continuously variable transmission, and a brake device that brakes a traveling system that receives power from the continuously variable transmission by pedal operation.

  In addition, the brake pedal is connected to the gearless lever of the continuously variable transmission by a link mechanism, and the gearshift lever is returned to the neutral position by the pedal operation. The entire system including the unit stops, and it is possible to secure safety when the combine operation is interrupted.

However, since the shift lever requires a large tilting force to return to the neutral position, the force acting on the shift lever via the link mechanism also acts on the support frame, causing the support frame to bend. The problem of increase in weight due to the support base having a large rigidity is incurred.
Japanese Patent Laid-Open No. 10-151956

  The problem to be solved is ground work that can ensure the interlocking return operation of the transmission with a compact configuration without requiring an excessive working force that causes the support frame that supports the transmission lever of the transmission to bend. There is to get a car.

The invention according to claim 1 is mounted on a travelable machine body and performs a traveling operation for cutting and threshing the culm as well as traveling, and a transmission for shifting the traveling system and the power supplied to the working system by a tilting operation of a transmission lever. And a grounding vehicle having a brake device that cuts off the traveling system power received from the transmission device by a pedal operation and brakes the traveling system, and a detection unit that detects the pedal operation of the brake device, and a detection unit that receives from the detection unit And an actuator that tilts to return the shift lever of the transmission to the neutral position in response to the detected signal.
In the ground work vehicle having the above-described configuration, the power supplied to the traveling system and the working system is shifted according to the operation of the transmission lever of the transmission, so that the working unit cuts and threshs the cereals in conjunction with the traveling of the body. At this time, when the brake is operated by the pedal, the traveling system is braked by the brake device and the airframe stops, and the actuator is operated by the detection circuit that detects the pedal operation, and the work lever is returned to the neutral position. Stop.

The invention according to claim 2 is characterized in that the actuator of the shift lever can be set according to the operation of an operation selection switch as to whether or not the operation is possible.
The ground work vehicle with the above configuration is stopped by the brake operation by the selection of the operation setting, and the entire operation system including the work system is interlocked through the actuator, and when the operation setting is released, the vehicle is stopped by the brake operation. In this case, the work system is operated according to the shift operation of the operator without returning the shift lever.

The invention according to claim 3 is characterized in that the actuator of the shift lever is configured to be operable on the condition that the working unit is stopped.
In the ground work vehicle having the above configuration, when the work section is stopped, the actuator is operated together with the stopping of the airframe by the brake operation, so that the entire work system including the work system is stopped in an interlocked manner, and when the work section is in operation, The working unit is operated by the power supplied from the transmission without operating the actuator.

The ground work vehicle of the present invention has the following effects.
The effect of claim 1 is that the shift lever is returned via an actuator that operates in accordance with the detection signal, so that an excessive working force that causes the support frame supporting the shift lever to be bent is not required, and a compact configuration is used. The interlocking operation of the transmission can be ensured.

  The effect of claim 2 is that by releasing the setting of the actuator operation in the cutting operation, the operation of the cutting portion can be performed when the pedal is operated to stop the machine body at the heel position. Therefore, it is possible to avoid troublesome problems such as clogging of cereals due to interruption of reaping, and to resume subsequent cereal harvesting work without trouble. In this way, the action selection switch can be used in response to the operator's will.

  The effect of the third aspect is that the operation of the actuator is switched in accordance with the stoppage or operation status of the work unit, and therefore, it is possible to cope with the required work status without depending on the judgment of the operator.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 and FIG. 2 show a right side view and a plan view, respectively, of a configuration example of a combine that is a ground work vehicle that performs cutting and threshing as an application target of the present invention. In FIG. 1 and FIG. 2, the combine includes a cutting part a, a threshing part b, a storage part c for storing the grains threshed and selected by the threshing part b, a working part such as a carry-out part d, and left and right crawlers e for traveling. , E, and a driving operation unit f for aircraft control. In the driving operation section f, an operation panel g is disposed on the front, a shift lever h for forward / reverse continuously variable transmission operation is disposed on the left side, and a parking brake pedal j and a take-in pedal k are disposed on the lower part of the front.

  As shown in the transmission system diagram of FIG. 3, the power of the traveling system and the working system of the combine is obtained from a hydrostatic continuously variable transmission n that shifts the power of the engine m forward and backward continuously according to the tilt of the shift lever h. The output is received by the transmission p and output to the left and right traveling systems. In the transmission p, the branch output is transmitted from the sub-transmission unit t that shifts the power received from the continuously variable transmission n according to the position of the sub-transmission lever to the cutting unit a and the culm transfer unit q. Further, the side clutch interlocking brakes (brake devices) r and r provided in the left and right traveling systems of the transmission p perform transmission transmission cutting and braking stop of the traveling system via a wire rod s connected to the parking brake pedal j. That is, when the parking brake pedal j is depressed, the left and right action portions 100, 100 are moved outward via the wire rod s, the left and right side clutches 101, 101 are disengaged, and when the parking brake pedal j is further depressed, the left and right action portions 100, 100 are disengaged. And the left and right brakes r, r made of a disk plate are connected to apply a brake to the traveling system.

  As shown in the perspective view of the main part of FIG. 4, the transmission lever h supports the base 1 of the lever main body so as to be pivotable by a support shaft 1 a, and also has a potentiometer 2 for detecting the amount of tilting at one end of the base 1. A continuously variable transmission n for continuously variable transmission through a rod 3 that transmits a tilting operation of 1 and a motor (actuator) 5 for rotating the base 1 to a predetermined angle are provided. This motor 5 uses a low-speed motor 5 in order to suppress the operating load of the transmission lever h, or a selective meshing gear 5a for limiting the transmission timing between the motor 5 and the base portion 1 or the like. . The motor 5 stops the working parts a and b in conjunction with the parking brake pedal j by forcibly returning the shift lever h to the neutral position by rotating the base 1 to a predetermined angle according to the signal. A starting safety device that enables starting of the engine m is configured. If necessary, an HST lever switch 6 is provided in the grip portion of the transmission lever h, and the operation of the motor 5 is restricted so that the starting safety device can be released.

  The control system for configuring the starting safety device includes a control unit (CPU) 11 that performs signal processing for operation control of the motor 5, the starter motor 7, etc., as shown in the input / output configuration diagram of the control unit of FIG. And a signal of a start safety switch (detection means) 12 for detecting the operation of the HST lever switch 6, the HST lever potentiometer 2, and the brake pedal j, and, if necessary, together with the HST lever switch 6 or the switch 6 Instead, signals such as a threshing lever switch 13, a reaping lever switch 14, a switching switch 15 for selecting and operating the setting of the safety shift are input. The HST lever switch 6, the threshing lever switch 13, the reaping lever switch 14, and the switching switch 15 constitute the control unit 11 so as to cancel the operation setting of the starting safety device by the signal.

  The combine starting safety device having the above-described configuration has the working parts a and b interlocked with the vehicle body traveling by shifting the power supplied to the traveling system and the working system in accordance with the operation of the transmission lever h of the continuously variable transmission n. Cuts and threshs cereals. At this time, when the brake pedal j is depressed, the brake system r, r activates the brakes in the traveling system, so that the airframe stops, and the motor 5 is activated by the signal of the detection means 12 that detects the pedal operation. When the lever h returns to the neutral position, the work system stops. As described above, the start safety device requires an excessive force that causes the support frame that supports the shift lever h to bend because the shift lever h is returned via the actuator such as the motor 5 that operates according to the detection signal. The output stop operation of the continuously variable transmission n can be ensured with a compact configuration.

  Further, the operation setting of the starting safety device can be canceled according to various conditions by the HST lever switch 6 and other input signals. The HST lever switch 6 can release the starting safety device in accordance with the operation of the operator, and even when the vehicle is stopped by operating the brake pedal, the shift lever h is not returned, and the work system is activated in accordance with the speed change operation of the operator. Operate. Therefore, when the pedal is operated to stop the airframe at the coasting position in the cutting operation, the operator operates the HST lever switch 6 to release the setting of the starting safety device, thereby making the troublesome lever for neutralizing the sub-shift t. The operation of the harvesting part a can be performed without requiring operation, so that troublesome problems such as clogging of the grains due to the interruption of the harvesting can be avoided by a simple operation. Reaping can be resumed without hindrance. Thus, the operation according to the operator's will is possible by operating the HST lever switch 6.

  Furthermore, in the structure which cancels | releases a starting safety device in response to the signal of the threshing lever switch 13 which detects the entering state of the threshing lever 103, and the cutting lever switch 14 which detects the entering state of the cutting lever 102, the cutting part a and the threshing part When the brake is operated when b is stopped, the actuator operates as the airframe stops, so that the entire work system including the work system stops interlockingly, the start safety device functions, and when the working unit is in operation, Since the shift lever h does not return to neutral even when the brake is operated, the working section is operated by the power supplied from the transmission n by operating the HST lever switch 6 without requiring a troublesome lever operation to neutralize the sub-shift. Therefore, it is possible to cope with the required work situation without the operator's judgment.

  Further, by selecting the operation safety of the starting safety device by the switch 15, the cutting portion a can be driven by the operation of the HST lever switch 6 when the airframe is stopped by the pedal operation. Therefore, an experienced operator who is familiar with handling can perform the pushing operation only by the button operation of the HST lever without being obstructed by the starting safety device and performing the neutral operation of the sub-shift t, thereby improving the operability. can do.

  In addition to the above, as shown in the transmission system diagram of FIG. 6, the work machine output branched from the transmission p is branched from the engine m in addition to the cutting first drive system U that transmits to the cutting input shaft v by the one-way clutch u1. A second cutting drive system W that transmits power to the cutting input shaft v by the one-way clutch w1 is provided. The second cutting drive system W is provided with a tension clutch y that is operated by a motor x. As shown in FIG. 7A, the control unit is configured to provide a switch or pedal dedicated to the picking-up operation to control the picking-up motor x, and as shown in the operation timing diagram of FIG. The tension clutch y is connected by the detection signal of the pedal, and the control unit is configured to drive the cutting unit a and the feed chain q by the second cutting drive system W for a predetermined time to perform the scrambling operation.

  By comprising in this way, only the grain cocoon harvested with the cutting blade of the cutting part a is conveyed to the threshing part b by the operation of the switch or pedal provided only for taking in without requiring the operation of the shift lever h. be able to. Therefore, the trouble of operating the speed change lever h when the aircraft is stopped is eliminated, and the problem caused by the drive time becoming longer than necessary, i.e., the uncut rice cake that has not been cut by the cutting blade is scraped to the star wheel. Therefore, when the vehicle moves backward as it is, the cereals are cut off, and when the vehicle moves forward, it is possible to avoid a situation where the scraper is clogged.

  Next, monitor display control will be described. In the monitor display control, as shown in the control input / output system diagram of FIG. 8, the display device and the lamp are controlled based on the position signal of the sub-shift lever and the vehicle speed signal. Specifically, as shown in the enlarged view of the display mode of FIG. 9, when a display device that digitally displays the vehicle speed is used and the sub-shift is in the “standard” or “low speed” position, the vehicle speed is displayed in seconds. When it is in the “high speed” position, it is configured to automatically display at the hourly speed. By switching the display in this way, the work speed is displayed at the second speed as usual, but at the time of traveling such as road driving using “high speed”, it is displayed at the hour speed, so it is easy to understand by matching with the road sign. .

  Further, for example, as shown in the front view of the configuration of the monitor of FIG. 10, when a large display lamp 21 is arranged in the vicinity of the vehicle speed display unit 22 and the vehicle speed display unit 22 can display only 0.01 m / s or more at a minimum, When moving at an ultra-low speed of 0.01 m / s or less, the display lamp 21 is lit to notify the operator. Conventionally, since the minimum 0.01 m / s is displayed on the vehicle speed display unit 22, there is a risk that the operator may hit the obstacle without noticing that the aircraft is moving at an extremely low speed. However, such a situation can be prevented by turning on the display lamp 21.

It is a right view of the structural example of the combine used as the application object of this invention. It is a plane of the structural example of the combine of FIG. It is a transmission system diagram of the traveling system and working system of the combine. It is a principal part perspective view of a transmission lever. It is an input-output block diagram of a control part. It is a transmission system diagram. FIG. 5 is a configuration diagram (b) and an operation timing diagram (b) for controlling the driving motor by a dedicated switch or the like. It is an input / output system diagram of monitor display control. It is an enlarged view of a display mode. It is a structure front view of a monitor.

Explanation of symbols

1 Base 1a Spindle 2 Potentiometer 3 Rod 5 Motor (Actuator)
5a Selection meshing gear 6 Lever switch 11 Control unit 12 Start safety switch (detection means)
13 Threshing lever switch 14 Mowing lever switch 15 Switching switch a Mowing part (working part)
b Threshing part (working part)
e Crawler f Driving control unit h Shift lever j Parking brake pedal k Brake pedal m Engine n Continuously variable transmission (transmission)
p transmission q grain transfer part r brake device s wire rod t sub-transmission part U mowing first drive system W mowing second drive system

Claims (3)

A working unit mounted on a travelable body for cutting and harvesting cereals along with traveling, a transmission that shifts the traveling system and the power supplied to the working system by tilting operation of the transmission lever, and traveling received from the transmission In a ground work vehicle provided with a brake device that cuts off system power by pedal operation and brakes the traveling system,
A grounding work comprising: a detecting means for detecting pedal operation of the brake device; and an actuator that tilts to return the transmission lever of the transmission to a neutral position in response to a detection signal received from the detecting means. car.   2. The ground work vehicle according to claim 1, wherein the actuator of the shift lever can be set according to the operation of an operation selection switch as to whether or not the operation is possible.   The ground work vehicle according to claim 1, wherein the actuator of the shift lever is configured to be operable on the condition that operation of the working unit is stopped.

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