JPH0540095Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an operational safety mechanism for a snow blower.

(b) Prior Art The safety devices of snow blowers have been known to the public for some time. For example, there is a technique as disclosed in Japanese Utility Model Application Publication No. 59-51814.

(c) Problems that the invention aims to solve However, in the conventional technology, the snow removal clutch lever and the travel clutch lever are linked;
There was no separate main clutch lever.

In addition to the snow removal clutch lever and the travel clutch lever, this invention provides a main clutch lever that controls both, and when the main clutch lever is not gripped, both travel and snow removal are impossible. be.

This allows you to concentrate all your attention on operating the main clutch lever, and the independent operation of the snow removal clutch lever and travel clutch lever is impossible unless the main clutch lever is gripped, creating a safer state. I was able to obtain this.

(d) Means for solving the problem The purpose of the present invention is as described above, and next, the configuration for achieving the purpose will be explained.

In a snow blower, a main clutch lever 1 is provided which is gripped together with a handle 2, and a snow removal clutch lever 3 and a travel clutch lever 4 are provided as separate rotation operation levers near the handle 2, and when the main clutch lever 1 is gripped, A rotating interlocking lever 7 is provided, and the interlocking lever 7 has engaging portions 7b and 7a.
are provided so that the engaging portions 7b and 7a can engage and interfere with the snow removal clutch lever 3 and the traveling clutch lever 4 at the position where the power is turned to the "on" side, and by gripping the main clutch lever 1, the interlocking lever 7 The engaging portions 7b and 7a are retracted from the engagement interference position between the snow removal clutch lever 3 and the traveling clutch lever 4, and the clutches of the traveling device 17 and the snow shoveling auger 14 can be operated to the power "contact" state, and the main clutch is By releasing the lever 1, the snow removal clutch lever 3 and the travel clutch lever 4 are forcibly returned to the clutch power ``off'' state.

(e) Embodiment The purpose and structure of the present invention are as described above, and next, the structure of the embodiment shown in the attached drawings will be explained.

FIG. 1 is an overall side view of the snowplow, FIG. 2 is a perspective view of the operating lever mechanism of the present invention, FIG. 3 is a perspective view of the same with the lever guide plate 11 removed, FIG. 4 is an enlarged side view of the main clutch lever 1, FIG. 5 is a front sectional view of the same, and FIG. 6 is an interlocking lever 7.
FIG.

Referring to FIG. 1, the overall configuration of the snow remover will be explained.

An engine E is arranged on a crawler-type traveling device 17, a snow removal blower 16 is arranged in front of the engine E, and a snow removal auger 14 is rotated in front of the snow removal blower 16.

The snow collected by the snow shoveling auger 14 is thrown up by the snow removal blower 16, and the snow is directionally removed by the chute 13 to a distant place.

The snow auger 14 and the snow removal blower 16 are
Power connection/disconnection is performed by the same snow removal clutch lever 3.

At the rear of engine E, there is a two-shaped handle 2L,
2R protrudes, and the handle 2 is attached with an operating lever mechanism that constitutes the essential part of the present invention.

15 is a chute rotation lever for changing the direction of the chute 13.

The specific structure of the present invention will be explained with reference to the drawings in FIGS. 2 to 6.

A lever pivot shaft 8 and a lever guide plate 11 are installed between two shaped handles 2L and 2R. The snow removal clutch lever 3 is pivoted on the right end of the lever pivot shaft 8, and the travel clutch lever 4 is pivoted on the left side.
A rotating arm 6 is fixedly attached to the left end. Further, on the lever pivot shaft 8, a midway portion in the vertical direction of an interlocking lever 7 formed in a framework shape is pivotally supported.

The upper end of the frame-shaped interlocking lever 7 is bent inward to form the engaging portion 7 with the snow removal clutch lever 3.
b, and an engaging portion 7a for engaging the traveling clutch lever 4. Further, a stop side biasing spring 9 is interposed between the interlocking lever 7 and the body.

The travel clutch lever 4 has a connecting portion 4a that connects a link or wire leading to the travel clutch device.
Similarly, the snow removal clutch lever 3 is also configured with a connecting portion 3a that is connected to a link or a wire.

A main clutch lever 1 with a pivot shaft 1a pivoted thereon is disposed above the handle 2L, and the main clutch lever 1 is also biased by a stop side biasing spring 12.
It is urged to rotate upward to the stop side.

A lever arm 5 is fixed to the tip of the main clutch lever 1, and a lever pin 5a projects from the lever arm 5. The lever pin 5a
is loosely fitted into the elongated hole 6b of the upper end of the rotating arm 6.

The rotating arm 6 has its center portion fixed to a lever pivot shaft 8, its upper end rotated by the main clutch lever 1, and its lower end arm pin 6a abutted against the front end of the interlocking lever 7. . 10 is a travel gear shift lever.

(f) Effect of invention The effect of this configuration will be explained.

When the operator does not grip the main clutch lever 1, the main clutch lever 1 is biased by the stop side biasing spring 12 and is in the raised state as shown in FIG. 2, and the lever pin 5a is engaged. The movable arm 6 is also pulled back to the position indicated by the chain line in FIG. 4 by the stop-side biasing spring 9.

In this case, as a result of the interlocking lever 7 being strongly pulled back by the stop side biasing spring 9, even if the snow removal clutch lever 3 and the travel clutch lever 4 are turned to the power "on" side, the travel clutch lever 4 is not engaged. Joint part 7
a is engaged with the engaging portion 7b of the snow removal clutch lever 3, and is pushed back by the stop side biasing spring 9, so that the snow removal clutch lever 3 is pushed back to the power "off" side.

Next, when the operator squeezes the main clutch lever 1, the lever pin 5a moves the rotating arm 6.
The stop side biasing spring 9 rotates to the position shown by the solid line in Figure 4.
The interlocking lever 7 is rotated to the position shown by the solid line in FIG. 6 against this movement.

Thereby, even if the snow removal clutch lever 3 or the travel clutch lever 4 is rotated, the rotation can be made without being pushed back by the stop side biasing spring 9, and the position is maintained by passing over the fulcrum.

Therefore, only when the main clutch lever 1 is gripped, the snow removal clutch lever 3 and the travel clutch lever 4 can be rotated in the power ``on'' direction and stopped at that position.

And the operator is the main clutch lever 1
When the main clutch lever 1 is released during snow removal work with the snow removal clutch lever 3 and travel clutch lever 4 in the engaged state, the interlocking lever 7 is immediately pulled back by the stop side biasing spring 9. Both the snow removal clutch lever 3 and the travel clutch lever 4 are pushed back from the stable state beyond the fulcrum, and the power is turned off.

(g) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, the snow blower has three operation levers: main clutch lever 1, snow removal clutch lever 3, and travel clutch lever 4, and operating only the main clutch lever 1 will not start driving or snow removal work. Snow removal and driving will not start until the main clutch lever 1 is operated and then the snow removal clutch lever 3 and travel clutch lever 4 are operated. This makes it possible to configure a double check function of operating the lever 1 and then operating the snow removal clutch lever 3 and traveling clutch lever 4. Therefore, it was possible to create a safer mechanism.

Second, even if an obstacle or a person is located in front of the snow shoveling auger 14 during snow removal work while the machine is moving, the snow removal clutch lever 3 or the running clutch lever 4 can be quickly grasped and rotated as in the conventional method. By releasing the grip of the main clutch lever 1, both the traveling device and the snow removal device can be stopped, thereby avoiding an instant accident.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the snow blower, Fig. 2 is a perspective view of the operating lever mechanism of the present invention, Fig. 3 is a perspective view with the operating lever guide plate 11 removed, and Fig. 4 is a perspective view of the operating lever mechanism of the present invention.
The figure is an enlarged side view of the main clutch lever 1, FIG. 5 is a front sectional view, and FIG. 6 is a side view of the interlocking lever 7. 1... Main clutch lever, 2... Handle, 3... Snow removal clutch lever, 5... Lever arm, 6... Rotating arm, 7... Interlocking lever, 8
... Lever pivot shaft, 9 ... Stop side biasing spring.

Claims (1)

[Scope of utility model registration request] In a snow blower, a main clutch lever 1 is provided which is gripped together with a handle 2, and a snow removal clutch lever 3 and a travel clutch lever 4 are provided as separate rotary operation levers near the handle 2, and when the main clutch lever 1 is gripped, A rotating interlocking lever 7 is provided, and the interlocking lever 7 has engaging portions 7b and 7a.
are provided so that the engaging portions 7b and 7a can engage and interfere with the snow removal clutch lever 3 and the traveling clutch lever 4 at the position where the power is turned to the "on" side, and by gripping the main clutch lever 1, the interlocking lever 7 The engaging portions 7b and 7a are retracted from the engagement interference position between the snow removal clutch lever 3 and the traveling clutch lever 4, and the clutches of the traveling device 17 and the snow shoveling auger 14 can be operated to the power "contact" state, and the main clutch This operating lever mechanism for a snow blower is characterized in that by releasing the grip of a lever 1, a snow removal clutch lever 3 and a travel clutch lever 4 are forcibly returned to a clutch power ``off'' state.