JPH0642268Y2 - Working machine operation lever device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an operating lever device for a working machine such as a lawn mower or a snowplow.

[Conventional technology]

Conventionally, in a self-propelled work machine, a work lever and a self-propelled lever are swingably attached in the front-rear direction in the vicinity of a grip portion of a handle extending rearward from a rear portion of the machine body. It is configured to drive and stop, and to run and stop by swinging the self-propelled lever.

[Problems to be solved by the device]

Then, the work lever and the self-propelled lever can be freely brought into contact with each other as a gate-shaped lever, the self-propelled lever is arranged behind the work lever, and the self-propelled lever is turned forward so that the self-propelled lever becomes the work lever. In some cases, the working lever is rotated forward together with the self-propelled lever so that both operation levers can be operated.

In such a case, the present invention prevents the work member from being driven only by rotating the work lever, provides the work lever with another switching lever, and operates the switching lever to rotate the work lever. By doing so, it is an object of the present invention to provide an operating lever device for a working machine in which a working member is driven.

[Means for Solving the Problems]

According to the configuration of the present invention, the work lever is attached to the handle so as to be rotatable in the front-rear direction, and the work lever drives and stops the work member by swinging the work lever in the front-rear direction. , An engaging lever that engages with the switching lever is rotatably mounted in the left-right direction, a torque spring is attached to the switching lever, one end of the torque spring is attached to the working lever, and the other end is the engaging lever. Inserted into a long hole or long groove provided in the lever, an engaging member having one end of a cable connected to the working clutch attached to the handle so as to be rotatable in the front-rear direction,
The engagement member is in a relationship of being engageable with the engagement lever rotated by the rotation operation of the switching lever.

[Action]

When the work machine is to perform work, first, the switching lever is rotated in the left-right direction. Then, the torque spring attached to the switching lever moves and bends, and one end of the torque spring moves in the long hole or the long groove of the engaging lever. As a result, the engagement lever is also rotated in the left-right direction and held at a position where it engages with the switching lever. In this position, the engagement lever is arranged to be engaged with or engageable with the engagement member. When the work lever is rotated in the front-rear direction in this state, the engagement lever also rotates in the front-rear direction about the pivotal fulcrum of the work lever, and the engagement member engaging with the engagement lever is rotated in the front-rear direction. . By the rotation of the engaging member, the cable connected to the engaging member is pulled, the working clutch is connected, and the working member is driven. Then, when the driving is stopped, the work lever may be rotated from the above state to the original position. Then, when the hand is released from the switching lever, the switching lever returns to the original position by the torque spring.

〔Example〕

1 is a perspective view of the mower, FIG. 2 is a side view of the rear portion of the handle portion, FIG. 3 is a rear view of the operating lever portion, FIG. 4 is a partial cross-sectional view of the main portion thereof, and FIG. It is a partial cross-sectional side view of the rear end part of a handle part.

In FIG. 1, a mower 1 has an engine 3 mounted on an upper part of a housing 2, a cutting blade is housed therein, and front and rear wheels 4,
The rear wheel 5 is provided. Then, the power of the engine 3 is configured to be transmitted to the cutting blade and the rear wheel 5 via separate power transmission systems.

Then, the glass bag 6 is attached to the rear portion of the housing 2, and the handle 7 extends rearward and upward from the rear end portion of the housing 2.

The handle 7 is provided with a pair of left and right handle pipes 7a extending rearward and upward from the rear end of the housing 2 and a gate-shaped grip 7b standing upright at the rear end of the handle 2. A connecting portion 7c is provided across the left and right handle pipes 7a, and a vehicle speed change lever 8 and a throttle lever 9 are provided on the connecting portion 7c.

A work lever 10 and a self-propelled lever 11 are attached to the rear end of the handle 7 as shown in FIGS.

The working lever 10 is an operating lever for rotating and stopping the cutting blade, and the self-propelled lever 11 is an operating lever for running and stopping the machine body, both of which are gate-shaped and are provided on both sides of the rear end of the handle 7. It is mounted so that it can swing back and forth. The self-propelled lever 11 is arranged behind the work lever 10 so that the gripping portions extending in the width direction can come into contact with each other. Comes into contact with the grip portion of the working lever 10 in the width direction, and the working lever 10 rotates together with the self-propelled lever 11.

Hereinafter, the structures of the working lever 10 and the self-propelled lever 11 will be described in detail with reference to FIGS.

Insert the upper open U-shaped mounting ends of the working lever 10 into the left and right side portions of the rear end of the handle 7 and insert them into the hinge pins 12
And the work lever 10 is attached to the handle 7 swingably in the front-back direction. Then, the hollow mounting end of the self-propelled lever 11 is inserted into the inner end of the hinge pin 12 protruding from the work lever 10, and the self-propelled lever 11 is swingably attached to the handle 7 in the front-rear direction. Then, a cable mounting plate 13 is fixed to the outer periphery of one end of the self-propelled lever 11, and the mounting plate 13
Attach one end of a cable (not shown) connected to the traveling clutch (not shown). A spring (not shown) is attached between the cable attachment plate 13 and the handle 7.

Further, an engagement plate 14 is rotatably attached to an intermediate portion of the hinge pin 12, and one end of a cable 15 connected to a work clutch (not shown) is attached to a position near the tip thereof.

The left and right side portions of the working lever 10 are U-shaped in cross section, and the switching lever 16 is arranged in the one side portion along the longitudinal direction. The switching lever 16 is provided with an operating portion 16a having an L-shaped cross section at the upper portion, and the lower portion following the operating portion 16a is a plate body, and a mounting shaft 16b and a peripheral wall 16c project around the mounting shaft 16b on the rear surface thereof. Insert it into the boss portion 10a that protrudes inside the rear wall, attach the bolt 17 from the outside of the rear wall, and attach the mounting shaft 16b.
It can be freely rotated in the left-right direction around. Further, an engaging lever 18 is disposed below the switching lever 16 in the side portion of the work lever 10, and the engaging lever 18 is also a plate body, and the mounting boss 18a projects to the rear surface of the upper end portion and the mounting boss 18a is switched. It is rotatably provided around the peripheral wall 16c of the lever 16. The lower end of the switching lever 16 is bent rearward in a stepwise manner and is arranged rearward of the upper portion thereof, and the side surface of the lower end and the side surface of the engaging lever 18 are engaged with each other. Then, the torque spring 19 is inserted and attached to the mounting portion 16d provided on the rear surface of the lower end portion so as to project, one end of the torque spring 19 is attached to the working lever 10, and the other end is provided above the engaging lever 18. It is inserted into the long hole 20 formed. Further, the engaging lever 18 is formed such that a portion lower than a portion engageable with the switching lever 16 is bent forward in a stepwise manner and arranged forward of an upper portion thereof. Engaging claws 18b are formed.

The operation of the operation lever device will be described below. First, under normal conditions, the work lever 10 and the self-propelled lever 11 are in the positions shown by the solid lines in FIG. 5, and the machine body and the cutting blade are stopped. Also,
Due to the action of the torque spring 19, the switching lever 16 moves to the fourth position.
It is held in the position shown by the solid line in the figure, and the operation part above the switching lever 16
16a projects from an opening 21 provided on the side surface of the work lever 10. Further, the engagement lever 18 that engages with the switching lever 16 is held at the position indicated by the solid line in FIG.

If you want to carry out the mowing work while self-propelling the machine from this state, do the following.

First, grasp the operation portion 16a exposed to the outside of the switching lever 16 together with the work lever 10, and attach the switching lever 16 to the mounting shaft 16b.
When it is rotated to the position indicated by the alternate long and short dash line in FIG.
The torque spring 19 moves and bends, and one end of the torque spring 19 moves in the elongated hole 20 of the engaging lever 18 to rotate the engaging lever 18 around the mounting shaft 16b of the switching lever 16,
It is moved to the position indicated by the alternate long and short dash line in FIG. At this time, the side surface of the lower end portion of the switching lever 16 is engaged with the side surface of the engagement lever 18. At this position, the engaging claw 18b of the engaging lever 18 can be engaged with the lower end portion of the engaging plate 14 rotatably attached to the hinge pin 12.

Then, in this state, when the self-propelled lever 11 is rotated forward, the cable mounting plate 13 is rotated rearward about the hinge pin 12, the cable is pulled, the traveling clutch is engaged, and the machine body is self-propelled. To do.

Further, the rotation of the self-propelled lever 11 also rotates the work lever 10. By this rotation of the work lever 10, the engagement claw 18b of the engagement lever 18 located at the solid line position in FIG. 5 moves upward along the arc locus and engages with the lower end surface of the engagement plate 14, Engagement plate
The 14 is rotated rearward about the hinge pin 12. As a result, the cable 15 is pulled, the working clutch is engaged, and the cutting blade rotates. In this way, while the machine body is traveling, the cutting blade is rotated and the grass cutting operation is performed.

Next, to carry out only the traveling of the machine body without performing the mowing work, if the self-propelled lever 11 is rotated forward without grasping the switching lever 16, the cable is rotated by the cable mounting plate 13. When the vehicle is pulled, the traveling clutch is engaged and the aircraft self-propels. Then, even when the working lever 10 rotates together with the self-propelled lever 11, the engagement claw 18b of the engagement lever 18 does not engage with the engagement plate 14, and the engagement plate 14 does not rotate. Therefore, the cutting blade does not rotate. In this way, the cutting blade does not rotate, but only self-propelled.

When the switching lever 16 is pushed and the work lever 10 is returned in the state of running independently, as shown in FIGS. 6 to 7,
The lower end surface of the engaging lever 18 collides with the lower end portion of the engaging plate 14 on the way, but since the engaging lever 18 rotates and moves along the side surface of the engaging plate 14, the engaging lever 18 and the engaging plate 14 are Damage is prevented.

Further, when only rotating the cutting blade, it suffices to grasp the switching lever 16 together with the work lever 10 and rotate only the work lever 10 forward.

[Effect of device]

As described above, according to the present invention, the work member is not driven only by turning the work lever, and the work member is moved by turning the work lever by operating the switching lever attached to the work lever. To drive. Then, when the driving is stopped, the work lever may be rotated from the above state to the original position. Then, when the hand is released from the switching lever, the switching lever returns to the original position by the torque spring.

When the switching lever is operated and the work lever is returned in a state where the work lever is running independently without performing work, the engaging lever collides with the engaging member, but the engaging lever rotates and engages. Since it moves along the side surface of the coupling member, damage to the engagement lever and the engagement member is prevented.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view of a mower, FIG. 2 is a side view of a rear portion of a handle portion, FIG. 3 is a rear view of an operating lever portion, and FIGS. FIG. 5 is a partial cross-sectional view of the main part thereof, FIG. 5 is a partial cross-sectional side view of the rear end portion of the handle portion, and FIG. 6 is a Z arrow view of FIG. 1 is a mower, 2 is a housing, 3 is an engine, 4 is a front wheel, 5 is a rear wheel, 6 is a glass bag, 7 is a handle, 7a is a handle pipe, 7b is a gripping part, 10 is a working lever, 11 is self-propelled. Lever, 12 is a hinge pin, 13 is a cable mounting plate, 14 is an engaging plate, 15 is a cable, 16 is a switching lever, 16a is an operating part, 16b is a mounting shaft, 18 is an engaging lever, 18a is a mounting boss, 18
b is an engaging claw, 19 is a torque spring, 20 is a long hole, and 21 is an opening.

Claims (1)

[Scope of utility model registration request] 1. A work machine in which a work lever is attached to a handle so as to be rotatable in the front-rear direction, and a work member is driven and stopped by swinging the work lever in the front-rear direction. An engaging lever that engages with this switching lever is rotatably mounted in the left-right direction, a torque spring is attached to the switching lever, one end of the torque spring is attached to the working lever, and the other end is the engaging lever. An engaging member having one end of a cable connected to a work clutch attached to the handle so as to be rotatable in the front-rear direction, and the engaging member rotates the switching lever. An operating lever device for a working machine, wherein the operating lever device is engaged with the engaging lever rotated by the.