JPH04335820A - Car speed controller of working car - Google Patents

Abstract

PURPOSE:To regulate the travel speed by providing a potentiometer for sensing operating position of a manual speed change lever of a combine, etc., and simultaneously providing a push switch for memorizing the operating position of the speed change lever. CONSTITUTION:In a combine equipped with a car speed controlling means (A) for automatically changing the speed according to a load so as to maintain the engine speed constant, a potentiometer 12 for sensing the operating position of a manual speed change lever 7 is installed and a push switch 13 for memorizing the operating position of the speed change lever 7 is simultaneously provided in a gripping part of the aforementioned lever 7. The maximum travel speed produced by operation of the car speed controlling means (A) is regulated to the travel speed when operation is performed with the push switch 13.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle speed control device for a combine harvester that adjusts the traveling speed according to the load condition of the engine, and more particularly, the present invention relates to a vehicle speed control device for a combine harvester that adjusts the traveling speed according to the load condition of the engine. Based on the detection information of
The present invention relates to a vehicle speed control device for a combine harvester, which is provided with a vehicle speed control means for automatically operating a traveling transmission to maintain an engine load within a set range.

0002

[Prior Art] This type of vehicle speed control device controls the transmission, that is, increases or decreases the vehicle speed, so that the engine rotation speed is maintained at a set reference rotation speed even if the load increases or decreases due to driving, threshing, etc. It is something to do. According to this, if the load decreases, the traveling speed will be increased, but if there are fewer planted grain rods near the headland, or if the vehicle travels to the adjacent field to be harvested while still in working condition. When the load is very light, the traveling speed becomes too high, so means for regulating the maximum speed while the vehicle speed control means is in operation is provided.

0003

[Problems to be Solved by the Invention] Conventionally, the maximum speed regulating means has been provided with a plurality of button switches that can uniquely determine the vehicle speed, and a selection type in which the operator presses and operates one of them. It was something. however,
When starting work or when operating a vehicle for beginners, it is difficult to actually understand the feeling of the maximum speed when controlling the vehicle speed when one of the button switches is selected, so it is important to remember that the selected maximum regulatory speed is appropriate. There is an inconvenience that it is not clear whether the maximum speed limit is actually reached or not. SUMMARY OF THE INVENTION An object of the present invention is to enable a driver to feel and understand the maximum regulatory speed set during vehicle speed control.

0004

[Means for Solving the Problems] For the above-mentioned purpose, the present invention provides a vehicle speed control device for a combine harvester as described at the beginning, which includes a position detection means for detecting the operation position of a transmission device for manually changing the speed of the transmission device. , a speed setting means for memorizing and setting the position at an arbitrary operation position of the transmission according to a manual command; A characteristic configuration is that the vehicle speed control means is provided with a regulating means for regulating the traveling speed.

[0005]

[Operation] In the characteristic structure described above, by operating the speed setting means, the traveling speed selected by the manually operated transmission can be directly set as the maximum regulated speed in the vehicle speed control state. In other words, you can operate the transmission and set the speed while simulating the actual driving condition, so you can intuitively experience the maximum speed you are about to set, and the engine load will be reduced, unlike in the past. This eliminates the inconvenience of being able to visually confirm whether or not the set maximum regulatory speed is appropriate only after the speed actually increases.

[0006]

[Effects of the Invention] Therefore, regardless of whether the operator is skilled or unskilled, it becomes possible to perform vehicle speed control while being aware of the regulated maximum speed when controlling the vehicle speed, so that the actual speed can be adjusted to the desired speed. It has been possible to provide a vehicle speed control device that is preferable from a safety standpoint and does not cause panic because the vehicle speed is faster than the previous vehicle.

[0007]

Embodiments Below, embodiments of the present invention will be explained based on the drawings. FIG. 1 shows a control system diagram of a vehicle speed control device for a combine harvester. The engine E and the crawler traveling device 1 are interlocked and connected via a hydrostatic continuously variable transmission device 2 for traveling, and the engine E and the handling barrel 4 of the threshing device are connected to a belt transmission mechanism 6 having a threshing clutch 5. are interlocked and connected. The engine E is provided with a rotation speed sensor (corresponding to a load detection means) S1 that detects the rotation speed of the engine E, and the transmission 2 is interlocked with a speed change lever 7 that is manually operated via a link mechanism 3. Along with this, the link mechanism 3
A speed change motor 9 is interlocked with the transmission mechanism 8 via a friction type transmission mechanism 8. In other words, the speed can be changed manually using the speed change lever 7, and the speed can be changed automatically using the motor 9. A vehicle speed sensor S2 is provided to detect the traveling speed based on the input rotational speed to the transmission section of the crawler traveling device 1. A control device 10 using a microcomputer is provided to operate the motor 9 and automatically adjust the vehicle speed based on information detected by the rotational speed sensor S1 and the vehicle speed sensor S2. Incidentally, reference numeral 11 is an activation switch for determining whether or not to perform a control operation. In other words, the vehicle speed control means A is constructed using the rotational speed sensor S1 and the control device 10.

[0008] The gear shift lever 7 can be moved in reverse R,
Neutral N and forward F are displayed, and a potentiometer (corresponding to position detection means) 12 is provided at the base thereof to constitute position detection means for detecting the operating position of the shift lever 7. In this combine, the potentiometer 12 and the control device 10 are set so that the vehicle speed control means A is activated when the start switch 11 is connected and the speed change lever 7 is operated to the forward position F. Further, a push switch 13 connected to the control device 10 is provided at the upper end of the gear shift lever 7, and when the push switch 13 is pressed and operated, the traveling speed displayed by the gear shift lever 7 at that time is changed. , the control device 10 regulates the traveling speed to the maximum speed generated by the operation of the vehicle speed control means A.
works. That is, the potentiometer 12 and the control device 10 constitute a speed setting means B that stores and sets the position of the shift lever 7 at an arbitrary operating position by a manual command from the push switch 13.

To explain the operation of this control device, first, the starting switch 11 is turned on, and then the gear shift lever 7 is operated from the neutral position to the forward position F side to start traveling, and the vehicle speed control means A is activated. The vehicle speed control automatically increases or decreases the traveling speed as the load increases or decreases. Then, when the speed change lever 7 is operated to increase the forward speed to a certain extent, the push switch 13 is pressed and operated, and the maximum speed in the vehicle speed control state is set as a regulation with the operator feeling the speed he/she intends. . Thereafter, when the engine E load becomes lighter and the transmission 2 is operated to shift to a higher speed side, the control device 10 controls the motor 9 so that the traveling speed does not exceed the speed at which the push switch 13 was operated. That's what I do. In this embodiment, the control device 10 constitutes the regulating means C that regulates the traveling speed to the speed at the time when the speed setting means B receives a set command from the push switch 13. Furthermore, when the start switch 11 is turned on and the speed change lever 7 is operated toward the neutral position N or the reverse position R, the vehicle speed control means A does not operate.

[0010]Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Figure 1] Control system diagram of combine harvester speed control device

[Explanation of symbols]

2 Transmission device 7 Gearbox 12 Position detection means A Vehicle speed control means B Speed setting means C. Regulatory measures E engine S1 Load detection means

Claims (1)

[Claims] Claim 1: Load detection means (S1) for detecting the load state of the engine (E);
) A vehicle speed control means (A) for automatically operating a traveling transmission (2) to maintain the engine load within a set range based on the detection information of the combine harvester. The control device includes a position detection means (12) for detecting an operation position of a transmission (7) for artificially changing the speed of the transmission (2), and a position detection means (12) for detecting an operation position of a transmission (7) for artificially changing the speed of the transmission (2); A speed setting means (B) for memorizing and setting the position by a manual command is provided, and the vehicle speed control means (A
), wherein the vehicle speed control means (A) is provided with a regulating means (C) for regulating the maximum traveling speed caused by the operation of the vehicle to the traveling speed at the time when the speed setting means (B) receives the set command. vehicle speed control device.