JPH0528989Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a slow running range detection device for detecting slow running that is not suitable for reaping running in a reaping harvester equipped with a continuously variable transmission. .

(b) Conventional technology In a reaping machine such as a combine harvester or a binder, if the speed conversion is obtained by a continuously variable transmission,
You can set any speed and it is easy to change gears. Furthermore, it would be much easier to set the speed in this case by using a single shift lever, with the center being neutral and the front and rear being forward and backward travel ranges, and the higher the speed toward the ends.

Therefore, in recent years, such continuously variable transmissions have been used in place of conventional gear type transmissions in structures such as transmissions.

(c) Problems that the invention aims to solve However, although this method allows for detailed speed settings at will, it is difficult to get an accurate feel for the correspondence between the position of the gear shift lever and the speed, or it is difficult to master this. There is a problem that requires .

Particularly problematic is mowing at very slow speeds, which are used when crossing ridges or climbing hills.

Such harvesting machines are generally equipped with conveyance devices that feed the grain culms from the reaping section to the threshing section and the tying section, so if these devices are operated at very low speeds such as slow forward movement, the amount of grain culm conveyed will be reduced. becomes significantly less,
This is because the conveyance posture deteriorates, the conveyance ability decreases, and finally conveyance becomes impossible.

(d) Means to solve the problem Therefore, this invention has a forward movement area consisting of a slow movement area, a reaping movement area, and a high speed movement area in order from the neutral area side, in front and behind the neutral area in the center. In a reaping harvester equipped with a continuously variable transmission, the speed of which is controlled by a speed change lever that sets the reverse range so that the speed increases toward the end, the speed change lever is in the slow speed range. A switch to detect the time and a switch to detect when the work lever is in the reaping work position are provided, and both switches and an on-delay timer are connected in series, and the delay contact of the on-delay timer is used to generate a buzzer. By activating external output means such as the above, the above-mentioned problems were solved.

(E) Effect As described above, when the gear shift lever is in the slow running range of the forward range and the work lever is in the reaping work position, the on-delay timer is activated, and when the delay contact closes, the buzzer etc. Since the external output means is activated, the operator knows that the aircraft's traveling speed is within this range.

On the other hand, the gear lever passes through this slow speed range,
When operating in work or high-speed driving areas,
By setting the delay time of this on-delay timer to be longer than the normal time for these to pass, the operation of the external output means is cut off and does not interfere with the operation.

(F) Embodiment An embodiment of this invention will be described below with reference to the drawings. Figure 1 is a plan view of the gear lever area,
The figure is an electric circuit diagram, FIG. 3 is a partially sectional front view of the continuously variable transmission and its operating device, and FIG. 4 is a partially sectional side view.

First, I will explain the transmission 1 of the reaping harvester. This transmission 1 transmits the power from the input shaft 2 to the final output shaft (corresponding to the wheel shaft, etc.), and the transmission system in the middle It has a continuously variable transmission 3 and a gear slide type forward/reverse switching device 4 on the road.

The continuously variable transmission 3 has an input disk 6 and an output disk 7 connected to an input shaft 2 and an output shaft 5, respectively, arranged facing each other, and an umbrella-shaped rolling element called a planetary cone 8 on the outer periphery of these disks. A differential planetary planetary system in which a ring 9 is pressed into contact with the conical surface (outer surface) of the planetary cone 8, and the position of the ring 9 is changed from the top to the bottom of the conical surface to obtain speed change. Use a mechanical type.

The gear slide type forward/reverse switching device 4 has a transmission gear 10 slidably and securely fitted onto the output shaft 5, and the transmission gear 10 is slid to select either the forward or reverse transmission system as described below. (not shown above).

In addition, regarding these operations, the ring 9 is operated by two operating members 11a and 11b that protrude laterally outside the mission 1 at an interval of approximately 180 degrees.
Further, the transmission gear 10 is similarly operated by the operating member 12, and this is done by a single speed change lever 14 which is pivoted at the lower end and guided by a guide groove 13 around the middle.

That is, the guide groove 13 has two parallel transmission grooves 13a and 13b, and one of the transmission grooves 13.
It consists of a communication groove 13c orthogonally connecting the rear end of the gear lever 1 and the front end of the other 13b.
4 is selected to be in the forward range when guided to one of them 13a, and selected to be in the reverse range when guided to the other, and the higher the gear shift grooves 13a and 13b, the higher the speed is set.

The shift operation structure 15 is for this purpose, but the key points are:
Movement of the gear shift lever 14 within the communication groove 13c rotates the operating member 12 to switch the transmission gear 10 forward and backward, and also to switch the two operating members 11a and 11b connected to the ring 9, one for forward and one for reverse, respectively. Select one of them, and in this state, move the gear shift lever 14 to the parallel groove 13a, 1 of the selected one.
3b toward the end side, the selected operating member 111a, 11b is rotated, and the ring 9
is moved to the high speed side.

In addition, from the above, the communication groove 13c of the guide groove 13 is the neutral region N, and one parallel groove 13a is the forward region F.
(However, among these, it can be distinguished from the neutral range N side into a slow running range A, a reaping running range B, and a high speed running range C.) The other parallel groove 13b can be said to be the reverse running range R.

By the way, this invention first includes a switch 16 that detects when the speed change lever 14 is in the slow speed range A, and a switch 16 that intermittently operates the power of the mill 1 to the working parts of the reaping part and the threshing part (not shown). A switch 18 is provided for sensing when a work lever 17, which is an operating member for this purpose, is in the reaping work position. Note that this work lever 17 also
It is provided next to the guide groove 13 of the gear shift lever 14, and is guided by a guide groove 19 consisting of two parallel grooves 19a and 19b and one communication groove 19c that communicates them. parallel groove 1
Threshing is turned on and off by moving between the ends of 9b, and the other parallel groove 1
The setting is such that reaping is turned on and off (however, in this case, threshing remains in the state) by moving between the ends of 9a (see Fig. 1).

On the other hand, regarding the installation method of the switch 16, an elastic lever 21 whose one end is fixed to a fixing member 20 etc.
etc., and the elastic lever 21 is plunged into the slow speed range A of the guide groove 13, and when the gear shift lever 14 passes through the slow speed range A, the elastic lever 21 is elastically deformed. switch 16
(See Figure 1).

Also, regarding the switch 18, the work lever 1
A sensing dog 22 is provided at the 7th etc., and when this comes to one end (enter) of the reaping guide groove 19a,
It is conceivable to operate this switch 18 (see FIG. 1).

Next, these switches 16, 18 and the on-delay timer 23 are connected in series, and the delay contact 23a (open contact in this case) of the on-delay timer 23 is used to output an external output means 24 such as a buzzer or lamp. (See Figure 2).

As described above, when the speed change lever 14 is in the slow speed range A and the work lever 17 is in the reaping work position, the coil portion 2 of the on-delay timer 23
3b is excited, and when the set time has elapsed, the delay contact 23a is activated and starts sounding a buzzer etc. to inform the operator of this fact. However, the actual delay activation time of the on-delay timer 23 is
Since the speed change lever 14 is set in a range that exceeds the time required for the speed change lever 14 to pass through this slow speed range A during a normal speed change operation, in such a movement of the speed change lever 14, the elastic The lever 21 is returned to its original position, and the on-delay timer 23 is reset accordingly. Therefore, such an operation does not cause a buzzer or the like to sound.

(g) Effects of the invention As mentioned above, this invention
A switch 16 detects when the machine is in the slow running range A in the guide groove 13, and a switch 18 detects when the work lever 17, which turns on/off the transmission of power from the mission 1 to the working part, is in the reaping work position. are provided respectively, and both of these switches 1
6 and 18 and the on-delay timer 23 are connected in series, and the delay contact 23a of the on-delay timer 23 operates the external output means 24 such as a buzzer. It is possible to predict and prevent reaping work when traveling at slow speeds that would cause malfunction of grain culm conveyance.

On the other hand, although this has been made possible with the simple configuration described above, this does not cause the inconvenience that would occur when the gear shift lever 14 or the like is activated by normal gear shifting operations (if the gear lever 14 is operated normally) , the buzzer etc. does not sound).

Furthermore, since the external output means 24 such as a buzzer operates only when the work lever 17 is in the reaping position, it does not operate during normal slow-speed driving such as when crossing a ridge, which is a problem. do not have.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the gear lever area, Fig. 2 is an electric circuit diagram, Fig. 3 is a partially sectional front view of the continuously variable transmission and its operating device, and Fig. 4 is a partially sectional side view. . Code, N...Neutral range, F...Forward range, R...Reverse range, A...Slow speed range, B...Reaping range, C
...High speed driving range, 3...Continuously variable transmission, 14...Shift lever, 16...Switch, 17...Work lever, 18...Switch, 23...On-day timer, 23a...On-day delay Timer delay contact, 24...External output means.

Claims (1)

[Scope of utility model registration request] Front and rear of the central neutral zone N are forward zone F and reverse zone R consisting of slow running zone A, reaping zone B, and high speed zone C in order from the neutral zone N side. In a reaping harvester equipped with a continuously variable transmission, which is equipped with a continuously variable transmission 3 whose speed is controlled by a speed change lever 14 set to and a switch 18 for sensing when the work lever 17 is in the reaping work position, and both switches 16, 18 and the on-delay timer 23 are connected in series,
Delay contact 23a of this on-delay timer 23
A slow running range detection device for a reaping harvester equipped with a continuously variable transmission, characterized in that an external output means 24 such as a buzzer is activated.