JPH0411518A - running vehicle body - 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 [Industrial Application Field] The present invention relates to a running vehicle body of an agricultural machine, such as a rice transplanter, to which a work Ja part is attached and used.

[Prior Art] There is a running vehicle body of a 17-year agricultural machine in which a counter shaft is provided in the middle of transmitting power from the engine to the mine case and the hydraulic pump is driven by the counter shaft.

[Problems to be Solved by the Invention] In this type of traveling vehicle, if the engine is configured to be started manually using a recoil starter or the like, the hydraulic pump must also be turned at the same time when the engine is started, which increases the load on the starter. becomes very large. For this reason, there was a problem in that women and elderly people with poor physical strength were unable to start the engine.

[Means for solving the problem] Above y! ! In order to solve the problem, the present invention has the following configuration.

That is, the traveling vehicle body according to the present invention includes an engine that is manually started, and transmits power from the output shaft of the engine to the transmission input shaft via a counter shaft, and drives a hydraulic pump with the counter shaft. It is characterized by the provision of a clutch that turns on/off transmission from the engine output shaft to the counter shaft.

[Function] If you start the engine with the clutch disengaged, the power transmission from the engine output shaft to the counter shaft is disconnected, so no load is applied to turn the hydraulic pump.
Therefore, the engine can be started easily.

[Example] The embodiments shown in the drawings will be described below.

This traveling vehicle body 1 is for use as an agricultural working machine, and is used by attaching a working machine part such as a rice transplanting device to a link device 13 provided at the rear of the machine body. The traveling vehicle body 1 is equipped with a transmission case 6 and an engine 7 on the front and rear sides on a frame 5 having a frame shape in plan view, and front wheel support cases to, to are mounted on final cases 9, 9 provided on the rear side of the mission case. is changeably attached, and the front wheels 11.11 are pivotally supported on this, and the rear wheels 14.14 are each pivotally supported on a rear wheel support case 13.13 provided at the rear end of the frame 6 so as to be able to roll freely. has been done.

A hydraulic pump 20 is installed between the mission case 6 and the engine 7.
From the engine 7 and hydraulic pump 20 to the mission input shaft 21. An engine output shaft 22 and a pump drive shaft (counter shaft) 23 are respectively protruded from the same side. A belt 27 is placed around a pulley 25 attached to the engine output shaft and a pulley 26 attached to the counter shaft.

The transmission section by this belt 27 is configured as an auxiliary clutch 2,000, and there is a clutch engaged state in which the tension roller 28 is pressed against the belt 27 and transmission is transmitted from the engine output shaft 22 to the counter shaft 23, and a clutch-on state in which the tension roller 28 is pressed against the belt 27 to transmit the transmission from the engine output shaft 22 to the counter shaft 23. It is possible to release the pressure and switch to a clutch disengaged state in which no power is transmitted from the engine output shaft 22 to the counter shaft 23. The drive mechanism for the tension roller 28 is constructed as shown in FIG. That is, the tension roller 28 is rotatably supported by a roller support rod 30, and is urged toward the side that presses the belt 27 by a spring 32 attached to an arm 31 that is integrated with the support rod. Further, a rear end portion of an operating wire 33 stretched longitudinally is tightly attached to the arm 31. The front end of the operation wire 33 is connected to the left and right brake pedals 35a,
It is tightly attached to a rotatable arm 37 provided below a brake pedal shaft 36 that supports the brake pedal shaft 35b. This arm 3
A swinging rod support rod 39 is attached integrally with the swinging rod support rod 7, and a swinging rod 40 swings at the tip of the swinging rod support rod with both left and right ends in contact with the lower surfaces of the brake pedals 35a and 35b. It can be installed freely. Normally, the tension roller 28 is pressed against the belt 27 by the spring 32, so the clutch is engaged, but when the left and right brake pedals 35a and 35b are pressed at the same time, the operating wire 33 is pulled and the force of the spring 32 is applied. arm 31 against
and the roller support rod 30 rotates, and the tension roller 2
8 is separated from the belt 27 and the belt 27 is loosened.
It becomes a state of being cut into pieces. If only one brake pedal is depressed, the swinging rod 40 swings and the movement is not transmitted to the swinging rod support rod 39, so the wire 33 is not pulled and the clutch is not disengaged.

A belt-type sub-transmission device 42 that also serves as a main clutch is provided between the counter shaft 23 and the transmission input shaft 21. This sub-transmission device 42 consists of pulleys 43a, 43b of the same diameter attached to a counter shaft, pulleys 44a, 44b of different diameters attached to a transmission input shaft, and belts 46a, 46b.
The tension pulleys 47a and 47b are used to tension one of the belts (46a and 46b) for low or high speed transmission, or the clutch is released to stop transmission by loosening both belts. It is designed to switch to the state of

As shown in FIG. 4, the engine 7 is equipped with a glue coil starter 50 for starting, and a knob 52 attached to the tip of a rope 51 let out from the starter is provided on the floor ball. The engine is started by quickly pulling this knob 52. When starting the engine, the left and right brake pedals 35a.

35b at the same time to disengage the belt 27, which is configured as an auxiliary clutch.If the belt 27 is in the clutch state, the hydraulic pump 20 must also be turned when the engine is started. , knob 52
Although a large force is required to pull up the knob 52, if the belt 27 is in the clutch disengaged state, the hydraulic pump 20 will not rotate, so the knob 52 can be pulled up easily.

During normal operation, the rotational power of the engine output shaft 22 is transmitted to the countershaft 23 via the belt 27 and to the gear input shaft 21 via the bell 46a (or 46b) of the sub-transmission device. The transmission case 6 transmits the driving output to the wheels 11.11 and the rear wheels 14.14 as a driving output, and also to the working machine section as a working output. A main transmission 55 is provided inside the mission case 6, and the traveling speed can be set to a high "road running speed", a low "field working speed", and a "field working speed".
It can be switched to three levels: reverse speed.

This main shift operation is performed using a main shift lever 57 provided along the steering post cover 56.

FIG. 5 shows the operating section of the main shift lever. A crank-shaped guide groove 58 is provided to guide the main gear shift lever 57, along which the road running speed F2, neutral N, field working speed F1. As shown in the figure, the field working speed Fl is provided at the crank part in the center of the groove, so when shifting from another shift to the field working speed Fl, the main The speed change lever 57 can be operated quickly and reliably. In the case of agricultural machinery, field working speed F
1 is used most frequently, so this field work speed F1
It is important to consider the change as a priority. Furthermore, since the field working speed Fl and the reverse speed R are arranged in the same row, the operating range of the main shift lever 57 in the field is made clear, preventing erroneous operation W and facilitating operation.

[Effects of the Invention] As explained above, in the traveling vehicle body according to the present invention, when manually starting the engine using a recoil starter or the like, the clutch edge is cut to cut off power transmission from the engine output shaft to the counter shaft. This eliminates the load of rotating the hydraulic pump, making it easier to start up with less force.

[Brief explanation of drawings]

FIG. 1 is a side view of one embodiment of a traveling vehicle body according to the present invention;
FIG. 2 is a plan view of the main parts, FIG. 3 is an explanatory diagram of the clutch transmission mechanism, FIG. 4 is an explanatory diagram of the beam coil starter, and FIG. 5 is an explanatory diagram of the operating section of the main shift lever. l... Running vehicle body, 6... Mission case, 7...
・Engine, 11...Front wheel, 14...Rear wheel, 20・
...Hydraulic pump, 21...Mission input shaft,? ? −
・・Engine output shaft, 23・・・Counter shaft, 27, 4
6a, 46b...Belt, 28...Tension roller, 50...Recoil starter, 57...Main gear shift lever roof 2rl! J1114rl! J

Claims (1)

[Claims] (1) In a traveling vehicle equipped with an engine that is manually started, power is transmitted from the output shaft of the engine to the transmission input shaft via a countershaft, and the hydraulic pump is driven by the countershaft, from the engine output shaft to the countershaft. A traveling vehicle body characterized by being provided with a clutch that turns on/off transmission to the vehicle.