JPH0127467Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety switch for a starter motor in an agricultural tractor.

Conventionally, the safety switch of the starter motor in agricultural tractors has been exposed in the vicinity of the base end pivot of the clutch pedal on the lower side of the step of the driving section, and the switch is easily exposed to muddy water etc. while driving. It was easy to collide with pebbles and the like thrown by the wheels, which could cause malfunction or damage, and maintenance and maintenance were troublesome.

In this invention, a safety switch is installed on the side wall of the clutch housing located inside the footwell cover, and the safety switch that connects the ignition switch and starter motor is connected intermittently, and the safety switch is operated intermittently from the clutch pedal. By doing so, the starter circuit is configured to be connected only when the clutch pedal is depressed in the power transmission disconnection direction, and the foot cover prevents muddy water from adhering to it and collisions with small stones, thereby preventing failure or damage to the safety switch. It is an object of the present invention to provide a safety switch for a starting motor in an agricultural tractor, which can prevent the above problems and reduce the number of maintenance and maintenance operations.

The embodiment of the present invention will be explained in detail based on the drawings.
A indicates an agricultural tractor, and this agricultural tractor A has a motor casing 2 housing a motor unit 1 in the front part of the upper part of a body frame a, and a driving part 3 on the rear side. Front wheels 4 are mounted on both sides of the front part of the lower part of frame a.
Rear wheels 5 are arranged on both sides of the rear part, and the front and rear wheels 4, 5 are driven by the power of the engine 6 of the prime mover section 1.

The driver section 3 is provided with a dart board 9 having a handle 7 and an ignition switch 8 at the front, and a driver's seat 10 at the rear. At the driver's feet when seated in 10,
A foot cover 11 that is sunken inward is provided.

Furthermore, steps 12 are stretched from the outer side of the foot cover 11 to the rear thereof, and a clutch pedal 13 is provided at the front end of the step 12. Also, from between the foot covers 11 on both sides,
A clutch housing 14 is disposed across the center of the rear side of the dash board 9, and the side wall 1 of the clutch housing 14 is located between the foot covers 11.
A safety switch 15 is disposed at an upper position of 4' in a substantially upward direction.

The safety switch 15 is to connect and disconnect the starter circuit that connects the ignition switch 8 and the starter motor 16 disposed in the prime mover section 1, and is operated intermittently by the clutch pedal 13. It is structured as possible. The on/off operation mechanism of the safety switch 15 will now be explained as follows.

That is, the clutch pedal 13 has its proximal end pivoted 18 on the bulge 17 of the clutch housing 14 located below the step 12, and can be depressed forward and downward around the pivot 18. , it is possible to recover from the depressed state centering on the pivot 18 by means of a return spring or the like.

A plate-shaped clutch interlocking lever 19 is disposed along the side wall 14' of the clutch housing 14 inside the foot cover 11, and the lever 19 is connected to a sliding cylinder 21 that slides the pressure plate of the clutch portion 20 back and forth. The clutch portion 19 should be engaged with the clutch portion 19 to connect and disconnect power transmission.

The upper part of the lever 19 is connected to the clutch housing 1.
4 through a position 22, and the same pivot 22
The lower end of the lever 19 is connected via an interlocking rod 25 to the upper end of a bracket 24 erected above the pedal base end boss 23 that constitutes the pivot support 18 of the clutch pedal 13. They are connected to form a link mechanism 26. Therefore, when the clutch pedal 13 is depressed, the sliding cylinder 21 is moved by the linkage mechanism 26, that is, by the forward sliding of the interlocking rod 25, the clutch interlocking lever 19 is moved clockwise when viewed from the left side. The clutch portion 20 is configured to be slid forward to disconnect power transmission from the clutch portion 20.

In addition, at the upper end of the clutch interlocking lever 19,
The upper extending portion is bent at a right angle to integrally form a switch pressure contact portion 27, and the safety switch 15 is disposed opposite to the rear side of the pressure contact portion 27, and the clutch pedal 13 is depressed. When the pressure contact portion 27 is pressed against the safety switch 15, the switch 15 is turned on, and the starter circuit connecting the ignition switch 8 and starter motor 16 can be connected. Furthermore, when the clutch pedal 13 is restored to its original position, the switch pressure contact portion 27 is separated from the safety switch 15, thereby disconnecting the starter circuit.

The clutch interlock lever 19 and the switch pressure contact part 27 are located inside the foot cover 11 and along the side wall 14' of the clutch housing 14.

The safety switch 15 is attached to the upper side wall of the clutch housing 14 via a stay 28, and the stay 28 is folded into a vertical portion 29 and protrudes outward from the edge of the vertical portion 29. It is composed of a curved projecting portion 30.
The stay 28 is attached to the side wall of the clutch housing 14 with bolts 31, 31, with a projecting portion 30 slanting forward downward, and a safety switch is installed approximately in the center of the projecting portion 30 of the stay 28. 1
5 are connected in series in an inserted state. Therefore, the engine 6 can only be started when the clutch pedal 13 is depressed in the direction of the power transmission disconnection operation.
Since the safety switch 15 is located inside the footwell cover 11 and at a relatively high position from the ground, muddy water may leak into the safety switch 15 when driving.
There is no fear that the safety switch 15 will be hit by pebbles or the like thrown up by the wheels 4, 5, and the safety switch 15 can be prevented from malfunctioning or being damaged.

According to the present invention, a safety switch for continuing the starter circuit that connects the ignition switch and starter motor is arranged on the side wall of the clutch housing located inside the footwell cover in a substantially upward direction, and the safety switch can be operated from the clutch pedal. By configuring the starter circuit for intermittent operation, the starter circuit is configured to be intermittent only when the clutch pedal is depressed in the direction of the power transmission disconnection operation, so the foot cover prevents muddy water from adhering to it and collisions with small stones, thereby preventing safety switch failure. This has the effect of preventing damage and reducing the number of maintenance and maintenance operations.

In addition, by mounting the safety switch in an upward direction, the present invention can reliably prevent muddy water from adhering to the safety switch, thereby ensuring smooth operation of the safety switch over a long period of time. It is something.

Furthermore, since the clutch interlock lever is plate-shaped and the upper extension part is bent at right angles to integrally constitute the switch pressure contact part, the clutch interlock lever has a simple structure and is easy to manufacture. At the same time, the thickness of the clutch interlocking lever can be made thinner, and therefore, it can be reliably covered by the foot cover while being placed along the side wall of the clutch housing, so that the driver's foot will not accidentally come into contact with the clutch interlocking lever. It is something that never happens.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of an embodiment of the present invention, FIG. 2 is a side view of the main part, and FIG. 3 is a plan view of the main part. A: Agricultural tractor, 3: Driving section, 8: Ignition switch, 13: Clutch pedal, 14:
Clutch housing, 14': side wall, 15: safety switch, 16: starter motor, 19: clutch interlocking lever, 26: link mechanism, 27: switch pressure contact portion.

Claims (1)

[Scope of utility model registration request] A clutch pedal 13 is disposed close to the foot cover 11 of the driving section 3, and a side wall 14' of the clutch housing 14 is located inside the foot cover 11.
A safety switch 15, which is to continue the starter circuit connecting the ignition switch 8 and starter motor 16, is disposed at an upper position in a substantially upward direction,
and a bracket 24 and an interlocking lever 25 interlockingly connected to the clutch pedal 13, a plate-shaped clutch interlocking lever 19, and a switch pressure contact portion 27 integrally provided by bending the upper extension portion of the clutch interlocking lever 19 at right angles. By configuring the safety switch 15 to be operated intermittently through the link mechanism 26, the starter circuit is configured to be connected only when the clutch pedal 13 is depressed in the direction of the power transmission disconnection operation. A safety switch for a starter motor in an agricultural tractor, in which an interlocking lever 19 and a switch pressure contact part 27 are located inside a foot cover 11 and along a side wall 14' of a clutch housing 14.