JPH0249392Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clutch that also serves as a torque limiter that automatically cuts off the transmission of power when an overload occurs in a transmission device for various power agricultural machines.

Conventionally, power agricultural machines such as binders are equipped with a torque limiter to protect the power mechanism including the transmission device when an excessive load is applied to the transmission device, and a clutch to continue the power. However, these were located at different locations and were designed to function independently, making the transmission generally complex.

The present invention functionally integrates the torque limiter and clutch, which were conventionally provided separately, as described above, thereby greatly simplifying the transmission device, and acting as a torque limiter to control the desired overload. However, it is an object of the present invention to provide a clutch that also functions as a torque limiter, which allows the clutch to be operated easily without increasing the load for clutch operation.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, the drawings illustrate a binder transmission device, 1 is a drive shaft, 2 is a transmission shaft, and the pinion gear 3 of the drive shaft 1 is The clutch gear 4, which is rotatably pivotally connected to the transmission shaft 2, is in mesh with the clutch gear 4. Reference numeral 5 denotes a clutch movable body. The clutch movable body 5 is attached to the transmission shaft 2 so as to be slidable only in the axial direction. Clutch pawls 7 of 5 are designed to mesh with each other. Reference numeral 8 denotes a compression bullet, and the compression bullet 8 presses and holds the clutch movable body 5 in a direction in which it meshes with the clutch gear 4. Reference numeral 9 denotes a clutch operating mechanism, 10 a sliding lever thereof, and 11 a clutch operating lever. engaged. This engagement groove 10' is
The clutch movable body 5 has a long groove so that it can be released from meshing with the clutch gear 4 when overloaded. 1
3 is a clutch lever, and the clutch lever 13 is connected to the sliding lever 1 by a connecting wire 14.
It is connected to one end of 0. Reference numeral 15 denotes a stopper, which is biased in the locking direction by a tension bullet 16, and the stopper 15 locks onto the locking protrusion 17 of the sliding lever 10 to lock it into the locking position of the clutch. It locks in the "on" position. The stopper 15 is connected to the clutch lever 13 by a connecting wire 18.
When the clutch is tilted in the direction of "off" indicated by the arrow, the stopper 15 is disengaged from the locking protrusion 17. Reference numeral 19 denotes an auxiliary ammunition device, which is elastically adjustable between the sliding lever 10 and the clutch operating lever 11 by means of an adjustment nut 19a, and the auxiliary ammunition device 19 is connected to the clutch movable body. 5 does not operate in the direction in which the clutch lever 13 is operated to the "disengaged" side, and the clutch lever 13
If an overload occurs when the clutch movable body 5 moves in the direction in which the clutch gear 4 is disengaged when the clutch gear 4 is in the "on" position, the compressor compressor 8
This acts as a weight on the elasticity of the material.

One end of the transmission shaft 2 is connected to a grain culm lifting device of the reaping section, and the other end is connected to a binding machine by a chain transmission mechanism 20.

In the structure configured as described above, the drive shaft 1
When the clutch gear 4 rotates, the clutch gear 4 is rotated via the pinion gear 3, but when the clutch lever 13 of the clutch operation mechanism 9 is not operated, the clutch movable body 5 is meshed with the clutch gear 4, so that
The transmission shaft 2 rotates. Also, clutch lever 13
When the clutch is tilted in the direction of "disengage", the stopper 15 is moved to the sliding lever 10 via the connecting wire 18.
The connection wire 1 is removed from the locking protrusion 17 of the
Since the sliding lever 10 is pulled via the clutch gear 4, the clutch operating lever 11 is rotated by the sliding lever 10, and the clutch movable body 5 is slid in the direction of disengaging the clutch gear 4. . In this case, the clutch operation only requires resisting the compression bullet 8, so the operation can be done easily. When the clutch lever 13 is returned to its original position, the movable clutch 5 is engaged with the clutch gear 4 by the compressor 8, and the clutch is in the "on" state.

On the other hand, if an excessive load is applied to the transmission shaft 2 for some reason while the clutch lever 13 is in the "on" position, the clutch movable body 5 will slide in the direction of disengaging the clutch gear 4. The power from the drive shaft 1 to the transmission shaft 2 is cut off. In this operation, the clutch movable body 5 resists the compression bullet 8 and the connecting arm 12
Since the auxiliary ammunition 19 is extended via the clutch operating lever 11, the elasticity of the auxiliary ammunition 19 acts as a weight on the elasticity of the compression ammunition 8 in the clutch movable body 5. Therefore, even if the elasticity of the compressor 8 is made small, the auxiliary ammunition 19 can be used as a torque limiter to set a desired overload cutoff value.

Further, if the initial tension of the auxiliary ammunition 19 is increased by adjusting the adjustment nut 19a, the load applied to the compression ammunition 8 can be further increased.

In short, the present invention rotatably pivots a clutch gear that interlocks with the drive shaft on a transmission shaft, and uses a compression elastic to move a clutch movable body that slides only in the axial direction and meshes with the clutch gear. A clutch operating mechanism that operates the movable clutch body by pressing in the direction of engagement is composed of a sliding lever that is interlocked with the clutch lever, and an operating lever of the movable clutch that engages with the sliding lever. There is no action between the movable clutch lever and the actuating lever when the clutch lever is operated in the ``off'' direction, which separates the movable clutch body from the clutch gear, but when the clutch lever is in the ``on'' position, the movable clutch body is released from meshing with the clutch gear. The present invention includes an auxiliary bullet whose elasticity can be adjusted to add weight to the elasticity of the compression bullet when a load is applied thereto, so that the torque limiter and the clutch can be functionally integrated, greatly simplifying the configuration of the transmission device. The adjustable auxiliary bullet applies weight to the elasticity that presses the clutch movable body against the clutch gear.
As a torque limiter, it can act on the desired overload, and moreover, the clutch operation can be performed easily without increasing the load for clutch operation, which is an extremely useful practical effect.

[Brief explanation of the drawing]

The drawing is a longitudinal cross-sectional view of essential parts showing an embodiment of a clutch that also serves as a torque limiter according to the present invention. In the figure, 1 is a drive shaft, 2 is a transmission shaft, 4 is a clutch gear, 5 is a clutch movable body, 8 is a compression bullet, 9 is a clutch operating mechanism, 10 is a sliding lever, 11 is a clutch operating lever, 12 is 13 is a clutch lever, 15 is a stopper, 16 is a tension bullet, 17 is a locking projection, and 19 is an auxiliary bullet.

Claims (1)

[Scope of utility model registration request] A clutch gear that interlocks with the drive shaft is rotatably pivoted to the transmission shaft, and a movable clutch body that slides only in the axial direction and meshes with the clutch gear is pressed in the direction of meshing by a compression elastic. The clutch operation mechanism for operating the clutch movable body is composed of a sliding lever interlocked with the clutch lever, and an operating lever of the clutch movable body that engages with the sliding lever, and a mechanism is provided between the sliding lever and the operating lever. is not used in the ``disengaged'' operation direction of the clutch lever, which separates the clutch movable body from the clutch gear, but when a load is applied to the clutch movable body to disengage it from the clutch gear when the clutch lever is in the ``on'' position, the compression occurs. A clutch that doubles as a torque limiter and is characterized by being equipped with an auxiliary bullet whose elasticity can be adjusted to apply weight to the elasticity of the bullet.