JPS5828210A - Speed controlling apparatus of vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides a vehicle speed control device, a bamboo mower equipment
The present invention relates to a speed control device that controls the traveling speed of a vehicle during work.

When a mower is attached to a vehicle such as a tractor to cut grass or the like, it is necessary to control the traveling speed of the vehicle depending on the load on the mower. In other words, if there is little grass, etc., the light load is steep, so the running speed should be increased to improve work efficiency. It is necessary to slow down to prevent mowing spots. However, in actual reaping work, it requires a great deal of skill for the driver to manually accurately judge the load condition m of the mower and control the vehicle's running speed appropriately. As a result, beginners are unable to smoothly control the running speed, resulting in rough mowing marks.

Furthermore, there was a drawback that the running speed was made slower than necessary, reducing work efficiency.

The present invention aims to solve all of the problems of the conventional art, and its features include a load detector that detects the mower's load status 51vi- in a vehicle with a biased mower. , a speed detector that detects the running speed of the vehicle, and a control means that calculates an appropriate running speed based on the load signal from the load detector, compares it with the speed signal from the speed detector, and controls the running speed. At the point.

Hereinafter, the present invention will be fully described in detail with respect to the illustrated embodiments. 1
Figures and gJ! In Figure 12, the tractor body (!) has a front @ f21 and a rear wheel (3), which uses the power from the engine 3 (4) to a hydraulic pump (6) and a hydraulic motor (6).
The transmission is transmitted to the rear wheels (3) via the hydraulic unit (7) consisting of the first class and the transmission device in the transmission case (8), and this rear wheel (3) is used as the driving wheel. do. The hydraulic pump (5) is of a swash plate type or the like, and can be operated via an operating pedal (9) f. This is a mid-mounted mower, which is equipped with a mower deck (11), a cutting blade body U21, a gauge wheel Q31, etc., and is attached to the tractor body (
1) Hydraulic bag i that is attached to the lower abdomen so that it can move up and down and is mounted on the rear W& of the tractor body il+ for lifting and lowering the work machine
Lift arm 1e, lift rod u71.
The isi arm Q81, the tie rod 09, the second arm wing, and the hanging hakama chain can all be operated up and down. Note that the first
Arm (t81 and second arm are tractor body il+
is supported by. The hydraulic system G51 is equipped with a control valve,
The control valve can be operated by a manual lever and can also be driven by a solenoid. 4 is a front PTO device, which is attached to the front VC of the tractor body 11+ to collect power from the engine 141;
TO device [Power is transmitted from the shiny PTO shaft □□□ to the mower (lα) through the to fin to each cutting blade body 0z of the mower (lα). From this engine (4), the mower (On the way to the power transmission system reaching 101, an electromagnetic clutch 4 is interposed, and a torque detector is provided to detect the load condition. This is a position detector that detects the rotational position of the pedal (9), and is configured to detect the entire running speed via the rotational position of the operation pedal (9).The blade is an operation circuit unit that detects torque. From the torque signal (load signal) from the device side, calculate the appropriate running speed for the current load condition! lVc, and compare it with the signal (speed signal) from the position detector (311) to issue acceleration/deceleration commands, rise/stop commands. etc., to the relay circuit.The relay circuit is the speed change operation unit)lB
41 and the solenoid (to). The speed change operation unit diagram is equipped with a DC motor, gears, friction plates, etc., and when a signal from the relay circuit is received, the operation pedal (9) can be operated in the acceleration/deceleration direction accordingly, and it is not normally operated. The hydraulic pump (6) can be operated by the pedal (9). In addition, the control means is constituted by the operation circuit 5, the relay circuit, the speed change operation unit (incorporated), and the like.

In the above structure ffjt, Midmount Mower T
When mowing lawns etc. with l0I, the engine (
Each cutting blade body a2+ is driven around the vertical axis by the power from
). During such reaping work, the load-like melting of the mower is detected by the torque fluctuation of the torque detector, and the running speed at that time is detected by the position detector. ), it is determined whether the load and speed at that time are appropriate. When the mower deck becomes clogged with grass and the load increases, the operation circuit unit (company) calculates the appropriate speed according to the load, compares it with the current running speed, and sends a deceleration command to the relay circuit [Vc to the appropriate speed. send money Then, the gear shift operation unit (2) operates and the operation pedal (9)
The hydraulic drive device (7) t-
Through this, the traveling speed is reduced to an appropriate speed, and the occurrence of mowing spots is prevented. In the case of light loads, the operation is opposite to that described above.

If a stone etc. gets stuck in the mower deck and the mower blade cannot rotate, Ice, overload condition 1! Therefore, the operating circuit unit 155 determines that control is impossible and sends a stop Φ rise command to the relay circuit. As a result, the electromagnetic clutch 4 is disconnected and the cutting blade body az immediately stops rotating, and the solenoid koji is activated to switch the control valve in the upward direction, and the mower (1 (I) rises and interrupts the reaping operation.Therefore, it is possible to prevent mower noise and damage between the power transmission systems due to overload, improving safety.

It is preferable that the torque detector (to), electromagnetic clutch (4), etc. be provided on the mower side rather than on the mower side. Moreover, the mower 1l (ll is not limited to the mid-mount type, and may also be a disc type, reciprocating type, etc.).The speed detector is based on the position detector IBIIK.

The traveling speed may be directly detected;
The load detector may be other than a torque detector.

In the present invention, the load state of the mower is detected by the load detector, and then the appropriate running speed is calculated by the control means, and the running speed is controlled by comparing it with the running speed detected by the speed detector. It is easy to operate during reaping work, prevents the occurrence of mowing spots, and allows efficient work to be carried out at all times in an appropriate state.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention;
The figure is a configuration diagram of the main parts. (1)...Tractor body, (4)...Engine, (
1)...Oil aEI [dynamic device, tltl)...Mid-mounted mower, glance...power transmission system, Tsuru...electromagnetic clutch, Take...torque detector,! 31)...Position detector, 9z...Operation circuit unit.

Claims (1)

[Claims] L Mower load condition mt in nine vehicles with mower metal bias
- A load detector to detect, a speed detector to detect the running speed of the vehicle, and a load signal from the load detector to calculate the appropriate running speed, and control the running speed by comparing it with the speed signal from the speed detector. A speed control device for a vehicle, comprising a control means for controlling the speed of the vehicle.