JPH0310334Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention allows a vehicle body equipped with a working device to swing around its rotational axis with respect to wheels supported on a single axle during work traveling. and an agricultural work vehicle that is installed so as to be able to change its posture during non-working driving, has an engine oil level detection sensor installed on the engine installed in the vehicle body, and is equipped with an alarm device that activates when the detection level of the sensor is below a set level. .

[Conventional technology]

Conventionally, the timing for starting and stopping the alarm device was determined based only on information from sensors. Therefore, if the sensor detected an oil level below the setting, the alarm system would have been activated.

[Problem that the invention attempts to solve]

However, since the vehicle body is tilted to the ground when driving while not working, there is a problem that the oil level does not reach the detection level of the sensor even though there is a standard amount of oil, and the alarm is activated. It was hot. As a result, the lubrication work by the worker becomes unnecessary and frequent, resulting in a decrease in work efficiency.

An object of the present invention is to provide an alarm that can be activated appropriately depending on the amount of oil in any vehicle body posture.

[Means for solving problems]

A characteristic feature of the present invention is that an alarm limiting device is provided that allows the alarm device to operate only when the main clutch is in the disengaged state, and its effects are as follows.

[Effect]

In other words, by adding not only the sensor to control the timing of starting and stopping the alarm device, but also the on/off of the main clutch as actuation information,
The alarm system is configured to operate only when the clutch is disengaged while the sensor is operating, so it is possible to activate the alarm appropriately depending on the oil level, regardless of the vehicle's posture. . Moreover, since the vehicle body is in a non-working position when the main clutch is disengaged, vibrations of the vehicle body, irregularities in the field, or
The system is configured so that the alarm can be activated during non-work driving when the oil level is relatively stable compared to working driving when the oil level is likely to fluctuate due to swells, etc., so the sensor detection activation is also possible. stable, especially
If the oil level is near the sensor setting level,
Since the oil level is stable, frequent hunting operations of the sensor can be prevented.

Furthermore, since the alarm can be activated while the vehicle is stopped, it can be effectively used for initial inspections, and since the vehicle is stopped, refueling can be easily performed.

[Effect of idea]

As a result, we have been able to improve work efficiency by optimizing refueling work, prevent hunting of level sensors, etc., and extend the life of the equipment.

〔Example〕

As shown in FIG. 2, a transmission case 3, an engine 4, a control handle 5, etc. are connected to the rear of a vehicle body 2 having a pair of left and right drive wheels 1, and a lifting device 6 is connected to the front of the vehicle body 2. The reaping device 9 is equipped with a reaping device 9 consisting of a cutting blade 7, a binding device 8, etc., and during reaping work the reaping device 9 is driven close to the ground as shown by the solid line, and when not working on the road etc. As shown by the lines, the binder is constructed such that the vehicle body 2 swings around the rotation axis P of the wheels 1 to lift the reaping device 9 off the ground and travel.

As shown in FIGS. 3 and 4, a fixed pulley piece 11a is fitted to the output shaft 10 of the engine 4 so as to be integrally rotatable, and a spring is attached to the boss part of this pulley piece 11a so that the pulley piece 11a can slide and move away. A split pulley 11 consisting of a movable pulley piece 11b which is biased and fitted into the transmission pulley 14 is attached to the input shaft 13 of the transmission case 3, and the transmission belt 15 is attached to the input shaft 13 of the transmission case 3. Wind the
Constitutes a belt transmission structure.

Tension wheel 1 for this transmission belt 15
A spring 18 and an arcuate link 24 pivot the swinging arm 17 supporting the belt 6 to the transmission case 3, and bias the arm 17 in the direction of tensioning the belt 15.
Bell crank 2 that can swing around axis X via
A gear shift lever 2, which will be described later, is interlocked with and connected to 5.
The belt tensioning device is constructed so that a constant tension can always be applied regardless of the speed change operation in step 1.

The swinging operation arm 19 for the movable pulley piece 11b is linked to the speed change lever 21 via the bell crank 25, which can swing freely around the axis X via an interlocking mechanism 20. When this shift lever 21 is operated to the first operating position N, the movable pulley piece 11b is separated from the fixed pulley piece 11a, and the transmission belt 15 is moved between both pulley pieces 11a, 1.
It moves to a non-transmission state where it moves away from 1b. Furthermore, when the shift lever 21 is sequentially operated to the second operating position L, the third operating position M, and the fourth operating position H, the movable pulley piece 11b moves to the fixed pulley piece 11a.
The transmission belt 1 is arranged so that the transmission belt 1 is successively approached from the low-speed transmission position, passes through the medium-speed transmission position, and is located at the high-speed transmission position.
A ratchet type locking mechanism 22 capable of fixing the gear shift lever 21 against the tension force of 5 and the biasing force of the spring 12 is attached to the interlocking mechanism 20, and also serves as the main clutch 23, and A running belt-type transmission device is constructed in which a pulley piece 11b is slid by a speed change lever 21 to perform a three-stage speed change. In addition, 26 in the figure is an operating shaft having the speed change lever 21 attached to one end and the bell crank 25 attached to the other end.

As shown in Figure 1, the sensor 28 becomes energized when the engine oil level falls below a set level.
is installed at the center position in the longitudinal direction of the engine 4, where the level can be detected relatively stably in both working and non-working positions of the vehicle body, and a switch is provided to detect the operation of the gear shift lever 21. This switch is configured as an alarm limiting device 29 that senses contact with the shift lever 21 and becomes energized when the main clutch is disengaged to the first operating position N of the shift lever 21. By connecting the above oil level sensor 28 and alarm limiting device 29 in series with an alarm device (for example, a lamp) 30, an alarm is issued when the main clutch is in a disengaged state and the detection level of the oil level sensor 28 is below a setting. Device 30 is configured to operate.

[Another example]

Next, another example will be described.

In carrying out the present invention, a tilling device or the like may be provided on the vehicle body 2 instead of the reaping device, and these are referred to as working devices 9. In short, the type of agricultural working vehicle is not limited.

The means for detecting the oil level can be changed in various ways, and they are collectively referred to as the sensor 28.

The alarm means can be modified in various ways, such as by providing a buzzer in place of the lamp 30 or by providing both together, and these are referred to as the alarm device 30. In addition, in order to allow the alarm device 30 to operate only when the main crank is engaged, instead of operating the circuit of the alarm device 30 on and off using a switch linked to the gear shift lever 21, the input shaft 13 of the transmission case 3 is operated. Various mechanical or electrical methods can be used, such as limiting the operation of the oil level detection sensor 28 based on rotation detection, and these are referred to as an alarm restriction device 29.

[Brief explanation of the drawing]

The drawings show an embodiment of the engine oil amount detection section of an agricultural working vehicle according to the present invention, FIG. 1 is a partially cutaway side view showing the engine and the oil amount detection section, and FIG. 2 is a side view of the reaping and tying machine. FIG. 3 is a front view showing the belt transmission structure, and FIG. 4 is a cross-sectional plan view showing the belt transmission structure. 1...Wheel, 2...Vehicle body, 4...Engine, 9
... Working device, 23... Main clutch, 30... Alarm device, 29... Alarm limiting device, P... Rotation shaft center.

Claims (1)

[Scope of utility model registration request] A vehicle body 2 equipped with a working device 9 is attached to a wheel 1 supported on one axle so that its posture can be changed freely between working traveling and non-working traveling by swinging around the rotation axis P. An engine oil level detection sensor 28 is provided on the engine 4 attached to the vehicle body 2,
The agricultural vehicle is equipped with an alarm device 30 that operates when the detection level of the sensor 28 is below a setting, and is equipped with an alarm restriction device 29 that allows the alarm device 30 to operate only when the main clutch 23 is disengaged. Engine oil amount detection unit for work vehicles.