JPH0318305Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a side clutch for a mobile agricultural machine. Side clutches in mobile agricultural machines, such as walk-behind binders and rice transplanters, are mainly gripped manually using a clutch lever. However, while this type of conventional side clutch has a simple structure, when the side clutch is disengaged, the engaging part of the clutch pawl that transmits power must slide against the spline part of the clutch, which increases the operating load. However, there was a big drawback.

To explain this with reference to the conventional example shown in FIG. 6, for example, this device has a pair of clutches having pin-shaped clutch pawls C' sandwiching an input gear B which is rotatably fitted onto an axle A. The clutch pawl C' is slidably engaged with the axle A by a spline, and the clutch pawl C' is fitted into and locked in the locking hole L' provided in the input gear L, thereby transmitting the power from the drive side to the input gear L. The signal is transmitted to the axle.

Therefore, with this clutch structure, when the side clutch is disengaged by sliding the clutch via the shifter, frictional force ( Because the side clutch has to be disengaged against sliding friction, the load required to disengage the clutch becomes large.Especially when driving on wet fields or on slopes where large torque is applied to the axle, the side clutch may not disengage easily (sliding friction). ) This causes the following inconvenience.

Therefore, the present invention provides a side clutch for a mobile agricultural machine in which a pair of clutches each having a clutch pawl are slidably provided on the axle, sandwiching an input gear that is rotatably fitted on the axle. It is composed of a clutch main body that is movable and slidable in the axial direction and a fixed body that rotates integrally with the axle, and between the clutch main body and the fixed body, one side is the clutch main body,
On the other side, an elastic body for returning the clutch, which is fixed to the fixed body, is interposed, and the power of the side clutch is transmitted through the elastic body, so that the load is reduced when the side clutch is disengaged. To allow only one part of the clutch pawl to slide in the engaged state of the input gear, thereby greatly reducing the operating load of the side clutch, and allowing the side clutch to be operated easily and safely at all times. The purpose of this invention is to provide a side clutch for mobile agricultural machinery that allows for

To explain the structure of the present invention with reference to an embodiment shown in the drawings, reference numeral 1 is an engine mounted on a binder, the power of which is transmitted to a traveling transmission 3 via a belt 2, and the speed is appropriately changed to drive a plurality of engagements. Hole 4',
4'... is transmitted to the input gear 4.

5, 5 are left and right axles supported by the transmission case 7 via bearings 6, 6, and the input gear 4 is connected to both axles 5, 5 at the inner ends of these axles 5, 5.
It is rotatably fitted in a state where it straddles 5.

8, 8 has an engagement hole 4' of the input gear 4 on one side,
4'... is a clutch main body provided with clutch pawls 8', 8'... which engage with the clutch main bodies 8, 8'...
are fitted to the axles 5, 5 so as to be rotatable and slidable in the axial direction. 9,9 is a fixed body and axle 5,5
is integrated by a spline 10,
An elastic body 11 for returning the clutch is interposed between the clutch main body 8 and the fixed body 9 and is fixed to the clutch main body 8 on one side and fixed to the fixed body 9 on the other side. In the illustrated example, this elastic body 11 is configured in the shape of a hollow disk. That is, as shown in the figure, a dish-shaped elastic member 11a, which is fixed to the clutch main body 8 and the fixed body 9, respectively, and whose center part is loosely fitted to the axle 5,
11b in the shape of palms together and screw 1 near the outer periphery.
1c is integrally fixed to form the elastic body 11 for returning the clutch, and with this configuration,
The power of the side clutch is transmitted from the input gear 4 through the clutch main body 8, the elastic body 11, and the fixed body 9 in order to the axle 5 and the wheels 12 provided at its outer end.

Therefore, the structure of the side clutch according to the present invention is such that the side clutch is divided into a clutch main body 8 and a fixed body 9, and these two are connected via an elastic body 11 for returning the clutch.

A shifter 13 is engaged with a groove 8a provided in the clutch main body 8, and its base end is connected to a clutch arm 15 via a shaft 14. 1
6 is a wire, one end of which is connected to the clutch arm 15,
The other end is connected to a side clutch lever 17.

In the configuration as described above, when the side clutch lever 17 is released (when the side clutch is engaged), the clutch main bodies 8, 8 are pressed toward the input gear 4 by the elastic bodies 11, 11, so that the clutch pawls 8',
8' is fitted and locked into engagement holes 4', 4'... provided in the input gear 4, and the power transmitted from the drive side to the input gear 4 is transferred from the clutch main body 8 via the elastic body 11 to the fixed body. 9, which is then transmitted to the axles 5, 5 to drive the wheels 12.

On the other hand, when the side clutch lever 17 is squeezed, the shifter 13 causes the clutch main body 8 to slide on the axle 5 in a direction away from the input gear 4 against the elastic body 11, so that the clutch pawl 8' is moved into the engagement hole 4'. When the side clutch is pulled out, the side clutch breaks.

When the lever 17 is returned, the elastic body 11 causes the clutch main body 8 to slide in the direction of the input gear 4, and the clutch pawl 8' engages with the engagement hole 4', thereby engaging the side clutch.

By the way, in the present invention, the clutch main body 8 itself, which moves on the axle 5 to engage and disengage the input gear 4, is not spline-engaged to the axle 5 as in conventional clutches, but rotates with respect to the axle 5 and rotates around the axle 5. Since it is fitted so that it can freely slide in the direction, the only part that slides under load during the side clutch disengagement operation is the engagement part between the clutch pawl 8' and the input gear 4, and therefore, the side clutch disengagement operation The operating load during operation is greatly reduced.

Therefore, the side clutch can be easily and safely operated even when working in wet fields or driving on slopes where a particularly large torque is applied to the axle 5.

As described above, the present invention provides a side clutch for a mobile agricultural machine in which a pair of clutches each having a clutch pawl are slidably provided on the axle, sandwiching an input gear rotatably fitted on the axle. The clutch main body is rotatable and slidable in the axial direction, and the fixed body rotates integrally with the axle, and between the clutch main body and the fixed body, one side is used as the clutch main body and the other side is used as the fixed body. An elastic body for returning the clutch, which is fixed to each other, is interposed, and the power of the side clutch is transmitted through the elastic body, so although the structure is simple, the load when the side clutch is disengaged is reduced. Only one part of the clutch pawl and the input gear that slides in the engaged state can be created, thereby greatly reducing the operating load of the side clutch, and allowing the side clutch to be operated easily and safely at all times. I can do it.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the binder equipped with the present invention, Figure 2 is a longitudinal sectional front view of the main parts, and Figure 3 is the binder equipped with the present invention.
4 is an explanatory diagram of the action of the main parts when the side clutch is engaged, Fig. 5 is an explanatory diagram of the action of the main parts when the side clutch is disengaged, and Fig. 6 is a longitudinal sectional front view of the conventional example. It is. In the figure, 4 is an input gear, 5 and 5' are axles, 8 is a clutch main body, 8' is a clutch pawl, 9 is a fixed body, 1
1 is an elastic body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A side clutch for a mobile agricultural machine comprising a pair of clutches having a clutch pawl that are slidably disposed on the axle with an input gear rotatably fitted on the axle sandwiching the input gear. consists of a clutch main body that can rotate and slide in the axial direction with respect to the axle, and a fixed body that rotates integrally with the axle, and between the clutch main body and the fixed body, one side is the clutch main body and the other side is the clutch main body. 1. A side clutch for a mobile agricultural machine, characterized in that an elastic body for clutch return, which is fixed to each fixed body, is interposed, and power is transmitted from the side clutch through the elastic body. (2) A side clutch for a mobile agricultural machine according to claim 1 of the utility model registration, characterized in that the elastic body is configured in the shape of a hollow disk.