JPS61163025A - Load control mechanism of agricultural tractor - Google Patents

Abstract

PURPOSE:To perform the tractor operation at high efficiency by detecting the engine rotation speed changed in response to load fluctuations and controlling the car speed in response to the engine rotation speed set to obtain the high output of an engine. CONSTITUTION:When a switch is transferred to an automatic speed changer, the load control is performed, and if the engine rotation speed exceeds a preset value, hydraulic clutches A, B and X, Y are transferred. When A, B and X, Y are transferred, the speed change of forward 1st-4th is performed, but the automatic speed change is performed only in speed steps at or lower than the preset speed of a manual speed changer set by a control 3. The increase or decrease of the engine rotation speed is judged within forward speed steps at or lower than the speed set by a manual speed changer, and acceleration or deceleration is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention focuses on the foot-mounted transmission of agricultural tractors! This is related to the composition controlled by lJ, and the load is pI during the production process! The trick is to have a change of luck +[-f
There are things that try to change it.

(b) Conventional technology A manual transmission system for agricultural tractors equipped with a hydraulic clutch type transmission system - Table 1 shows the registered M59 by the same author.
-124270 was a rare occurrence. In the future, non-invention will become even more sophisticated.

(c) The aim of the invention, which the invention is trying to solve, is to have a manual shift table and a manual shift practice as a shift masterpiece, and also have a selection means like the one in , The engine rotation speed, +W, etc. are used as the feedback No. 14 for the automatic transmission.

When the rotation of the engine equipped with such an automatic iMJ transmission means increases, the automatic transmission speed increases to 3rd and 4th gears in response to a light load. Loerohi noticed that the structure of the agricultural tractor was dashing away. As a result, the operator was fired,
There is a high possibility that the salary will go out of control and increase to C4. The present invention was created in Confucianism to prevent this.In addition, in order to achieve this purpose, if the speed is not increased beyond the range set by manual shifting, Even if the engine is running, it will not be possible to increase the speed further, so unless the operator tells you what kind of load condition it is currently in, the engine will continue to operate within an inappropriate range for the engine rotation. 0 The non-party member will show the operator whether the range of the manual speed change is correct, whether it is too sectarian, or whether there is no sect. The change in history, the rotation of the accelerator lever, and the up and down movement of the 4tl.

2) The first aspect of the present invention to solve the problem is as follows. Next, the configuration for achieving the object will be explained.

On the speed change table of the spreader tractor, there is a manual transmission and a manual transmission. The speed stage is set to be a speed stage lower than the speed stage.

In addition, a display device is installed to display whether or not the speed range of this section corresponds normally to the engine speed.
This is designed to display this on the display device when the upper limit speed stage established by changing the dynamic speed table is the highest.

(E) Embodiments and Functions The objects and structure of the present invention are as described above, and the structure of the embodiments and functions of the invention described in the fourth section are congratulatory explanations.

ml is a flat curved diagram of a spreader tractor. 111g2 is an enlarged plan view of the dash board section. The third example shows another example of speed display. No. 4181 is the load self Mil of the present invention
l Sub-Government City 1” Gobloc Iwakyo. Figure 5 is also a hydraulic circuit diagram. The 6th one is the same 1ttlJ flow chart. The 7th block is also the control block line section. FIG. 8 and FIG. 9 are plan views showing other examples of the load status display device that displays whether or not the speed range has a normal correspondence relationship.

Let me explain first from Figure 1, Figure 2, and Figure 3.

&/l is a hawk type, and a steering wheel is installed on the seat 1$Vll. A dash board (toward) is provided below the steering wheel VbI,
Here is the speed stage display shout and the load condition poor display (1)
Two display devices are arranged. 14+ is f: the front bar, and dl19 is the speed stage configuration switch for manual speed.

Yuaki Moto is able to control the load by controlling the vehicle speed according to the engine speed (kilometers) that changes in response to fPF and Awasaki's load fluctuations, and the engine speed is set to be within the engine's output range. By doing so, we were able to improve the efficiency of chestnut cultivation using tractors.

In other words, the engine IP! When the number of rotations exceeds the set range, the vehicle speed is decelerated one step at a time, and when the engine speed returns to the set speed, the speed is returned to the original speed. By reconsidering
'F', which maintains the engine rotation d' during millet within the set range.

The second worst type of speed attack display remanufacturing is the display device (19a) using a manual transmission and the mounting device (191) using a giant transmission mechanism.
)) are provided separately.

In Fig. 3, only one set of display devices is provided, and the continuous lighting of the lamp indicates the shift position based on the manual seismic speed table, and the flashing display of the lamp indicates the shift position of the automatic shift means. ing.

- is the engine tachometer. In addition, manual gear shifting is performed using the gear shift lever (4).

The rotation position of the speed change lever (4) is fed back to the control section (3) by a 61vA switch of the speed stage setting switch util of the main speed change lever.

In addition, feedback No. 1d is sent to the control section from Tanibe as shown in FIG.

The auxiliary gear shift lever pumping switch of the auxiliary gear shift lever (5), the accelerator lever of the accelerator lever (6) [dd output switch, γ circular pressure lift lever conventional switch t14 of the γ Sannori 7 Trevor (7), Brake pedal (8) Brake pedal position titm output switch, engine rotation speed sensor +91, FIB pressure clutch type f movement device II (
(b) The solenoid valve that controls each hydraulic latch - V switch and the self-grtLXlr switch VD of the operating section (z), "off"
Switch @, reset switch (to), etc.

When the vehicle is in a bad condition, the control lamp on the display section (1) lights up.

Hydraulic clutch type main shift by No. 51! A-director's explanation.

The forward and backward movement of 44 degrees is the result of two hydraulic pressures.The ``contact'' of → and (7) transmits the rotation of 44 degrees from @u0 to (to).

The third gear is connected to the hydraulic clutch device (43) and (7), and the second gear is connected to the hydraulic clutch (43) and
The 1st gear is connected to the hydraulic clutch device ilt, and the 1st gear is connected to the hydraulic clutch device ilt. , the second speed is obtained by the hydraulic clutch shown in Table 1) and (7).

Neutral is obtained when all of hydraulic clutch table 4 (B) and (6) are satisfied.

Also, in the m5 cause, the latch gate is pressed and closed! 1(5)(
5) (S) (4) (There is a pressure sensor 1521-(
To) - (To) is provided, and when the pressure γ field reaches this point and the valley hydraulic clutch device becomes "contact", the pressure sensor will output t) ■ and the main gear speed stage display will be corrected. Displayed on the 95th automatic transmission gearbox.

In the case of the third evil, the point is shown.

In addition, when the gear lever (4) is in the gearbox and the shift lever (4) is pressed down, the ox drive old pressure control unit is shifted to 7+4 at once, and forward from speed jg
Shifts up to 4th gear.

Then, when the automatic gear shift gL is directly visible, a load operation is performed, and when the rotation speed exceeds the set value due to the decrease in pfI of the engine rotation type, the expansion clutch is activated by ali. Table + m (g) stem) and (X) (b) are executed.

(A) (B) and (X) (r) (1) By cutting
ItU cruise aiK It is easy to shift because the 1st, 2nd, 3rd, and 4th gears are shifted, but due to the setting of the flowchart of the control section shown in the 6th example, the set speed is lower than the opposite gear by +yIB gear. This is because automatic gear shifting is only performed in the following speed ranges.

Also, the transmission gear is in trouble if the gear is automatically changed during work, so I don't like it. (6) is the accelerator lever, ual is the accelerator lever position Narita switch.

Next, let's explain the flowchart of m6 factors.

(where field is the number of engine revolutions, (ne) is the lower limit set engine speed, and (nh) is the upper limit set engine speed.

In addition, (smri is manual operation speed step 4th gear break-in, (smx) is manual operation speed step 3 step run-out, (smz) is manual operation speed step 2nd speed break-in, (smx) is manual deep cultivation step. This is the valley decision department that is constantly pumping out.

(R8a) has a smiley mishun meshing 4-speed engine, (
R13s) engages 3 consecutive downs, (Re) engages 2nd speed - out, (R8s) engages 2nd speed, and is the conventional valley decision part for L speed.

As shown by these symbols, the + sea bream transmission determines that the engine rotational speed should be reduced by 4 within the forward movement of the speed stage below the blinding speed, and the 4th gear/deceleration is performed.

-p-AIJ change gear shift #, <For Jm with which luck is not carried out, the shift is carried out with a luck that is not unreasonable for the horsepower rc of the engine near the center. There is an OT ability that can be used.

For example, the engine may still be rotating at high speed, but there is a limit to its horsepower, so work is being done at low speed, or work is being done under heavy load even though the engine is running at a low speed. In the previous statement, number 41 = P - To increase the set speed of sea bream η, there is peace of mind in increasing the accelerator metal work, and in the case of Tomoke, there is peace of mind in raising the accelerator. A load status display (
1) is provided on the dash board (to).

In the actual distribution example of the second evil, it is expressed in three ways.

The anastomosis of "Engine * Cargo load" occurs when the engine speed is above the set range and the luck is in the range of failure and cannot increase any further. tbji, -P
Raise the excitation setting speed or lower the accelerator.

"f$" is F2F1 This is when 1111J is being controlled normally.

"Engine*No load*4" is displayed next to the engine's rotary type when it is set at a lower speed than the lower range, and when the operation setting is set at a Jt low speed gear (1st gear) within the gear range. When I can't do it, I feel safe enough to step up the gas pedal.

In the example of W, 8 evil, the engine type is indicated by ``me 9'' or ``none'', which is indicated by the - way of sword gourd. There is.

The ninth example of the central distribution shows an example in which two types of display are displayed: "Shift up" and "Shift down".

(f) Since the present invention has been completed in #4 as described above, the following types of young fruits are produced.

First, the eyes [? 1flJ operator can shift gears by himself within the speed range, and even if the load on τf'' Toshin suddenly becomes uneven for some reason during eye movement control, the tractor can still be maintained. Power (I was able to do it in a simple manner so as not to dash.

Secondly, by moving beyond the erroneous stage of the -P gear shift, the town rib that can earn money by direct delivery that does not adapt to the rotational ridge of the engine is focused, but the negative 1 condition is clearly displayed. By displaying the full status of the lever, the operator can change the working conditions,
For example, hands! li! You can quickly change the J setting speed, change the accelerator, raise or lower the work speed, etc.

[Brief explanation of drawings]

The first culprit is the Hei 4 diagram of the agent tractor. The second bad thing is an enlarged plan view of the Datshu board Zheng. 5g318I is 11 of Hayaibara Shuganji
Page 181 showing 11 examples. 44 is a block diagram of the load self-creation t+m device of the present invention. The fifth problem is 1st control hydraulic pressure - WrIiMo. The sixth problem is also a control flow chart diagram. i@7Ko is also a control block line section. 8th evil,
Figure 5g9 is a plan view showing another example of the results of the display iA7 which displays the luck of entering the normal pair 6 relationship or 9t. (1)...Loaded IPIA power field (41-...Main gear shift lever μ)...Engine regulation...Speed display device (to)...Datsushboard applicant Yanmar Diesel Agent, Patent Attorney, Amano Naoki, Part 7, Figure 7

Claims (2)

[Claims] (1) In agricultural tractors in which a front transmission and a front transmission are installed side by side, the speed to be changed by the automatic transmission should be lower than or equal to the speed selected by the manual transmission. A load control mechanism for an agricultural tractor, characterized by comprising: (2) The load control mechanism according to claim 1 is characterized by being provided with a load status display device that displays whether or not the speed range has a normal correspondence with the engine speed. Agricultural tractor load control mechanism.