JPH10138779A - Neutral position temporary stop structure of operating lever - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent direct entrance to a backing position by passing through a neutral position by making an operating lever temporarily stop at the neutral position by receiving work of an engagement spring in case of moving the operating lever at least from a forwarding position to the backing position by providing the engagement spring in the neighbourhood of the neutral position. SOLUTION: An operating lever 40 is temporarily stopped at a neutral position by resistance of an engagement spring 46 in case of changing the operating lever 40 from forwarding to backing or vice versa by providing the engagement spring 46 to temporarily stop the operating lever 40 at the neutral position in case of changing the forwarding position and the backing position to each other. Consequently, at the time of trying to return the operating lever 40 to the neutral position so as to stop forwarding, such a dangerous state is never caused when the operating lever 40 pverpasses and enters the backing position and a car body suddenly backs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for temporarily stopping a control lever at a neutral position.

[0002]

2. Description of the Related Art In a mobile work machine such as a cultivator or a snow blower, a control lever guided by a guide groove is provided near a control handle, and the control lever is moved forward or backward depending on the position of the control lever. In this case, most of the guide grooves are formed straight for quick operation of the lever. When the control lever is at one end of the guide groove, it is forward, when it is at the other end, it is reverse, and when it is in the middle, it is neutral. (Stop).

[0003]

With such a configuration, when the control lever is returned from the forward position to the neutral position, the control lever may pass the neutral position and directly enter the reverse position. Particularly, when the operation is performed while the user is distracted from the work, such a situation may occur and the worker may be exposed to dangerous eyes. In the present invention, such a situation is prevented by devising the control lever to reliably stop at the neutral position.

[0004]

SUMMARY OF THE INVENTION Under the above-mentioned problems, the present invention relates to a control lever which is guided and moved by a straight guide groove, wherein one end of the guide groove is at a forward position, the other end is at a reverse position, and , A locking spring is provided near the neutral position, and the control lever is temporarily stopped at the neutral position by the action of the locking spring when the control lever is moved from at least the forward position to the reverse position. The present invention provides a structure for temporarily stopping a neutral position of a control lever.

[0005] By taking the above measures, that is, when the control lever passes the neutral position by the locking spring, the control lever is temporarily stopped at that position. Therefore, the situation where the control lever suddenly enters the reverse position from the forward position is prevented. Since the stop at the neutral position is temporary, it can be changed to a desired position by continuing the operation.

Further, according to the present invention, in the above means, a plurality of guide grooves are provided in parallel, a means in which a cross groove communicating each groove at a neutral position is provided, and the locking spring is constituted by one member. And a means for providing a dedicated locking spring in each guide groove.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where the present invention is applied to a snow blower will be described below as an embodiment with reference to the drawings. FIG.
Is a side view of the snow blower, and FIG. 5 is a front view.
A body part 10 and a snow removing part 1 connected to the front of the body part 10
Consists of two.

Here, the vehicle body 10 has a crawler 1 at a lower portion.
4 and a chassis 18 with a steering handle 16 attached to the rear. The crawler 14 includes a front wheel 20 and a rear wheel 22.
The engine 18 and the transmission 26 are mounted on the chassis 18. The power of the engine 24 is transmitted to the mission 26, and the output of the mission 26 is transmitted to the front wheels 20.

The snow removing section 12 includes a horizontally long snow removing case 30 having an open front, and a snow removing chute 32 that is vertically erected on the snow removing case 30 so as to be able to rotate horizontally. Snow removal case 30
A vertically rotating auger 34 is provided horizontally, and a horizontally rotating slower 36 is provided at the center rear of the auger 34 and below the snow removal chute 32. These augers 34
Also, the thrower 36 is driven by the output from the mission 26.

As described above, when the chassis 18 moves forward, the snow in front of the snow removing case 30 of the snow removing section 12 is collected at the center by the auger 34, and the collected snow is bounced off the snow removing chute 32 by the thrower 36. In this way, snow removal work for roads and the like is performed.

The steering handle 16 has a lever box 38.
Are mounted, and various levers are centrally arranged in the lever box 38. A control lever 40 for controlling the forward / backward movement of the vehicle body 10 is also provided in the lever box 38.
It is provided in. Thus, the control lever 40 is guided and moved by the guide groove 42 formed on the upper surface of the lever box 38.

The guide groove 42 has a straight shape forward and backward, and when the control lever 40 is positioned at the front end, the chassis 1
8 is set so as to move forward, move backward when positioned at the rear end, and stop (neutral) when positioned at the middle. Note that two guide grooves 42 in this example are arranged in parallel.
It has a horizontal H shape in which a cross groove 44 communicating with each guide groove 42 is provided at a neutral position in the middle. That is, the two guide grooves 42 are divided into a high-speed side and a low-speed side,
Is switched through.

In the present invention, when the control lever 40 is switched between the forward position and the reverse position, a locking spring for temporarily stopping the control lever 40 at a neutral position is provided. FIG. 1 is a partial plan view of the lever box 38 showing the state, and FIG.
FIG. 2 is a sectional view taken along the line A-A in FIG. 1.
8 and a part of the leaf spring is projected into the guide groove 42 near the neutral position.

By providing the locking spring 46 described above,
When the control lever 40 is changed from forward to reverse, or vice versa, the control lever 40 is temporarily stopped at the neutral position by the resistance of the locking spring 46. Therefore, the vehicle moves from the forward position to the reverse position at a stretch, and the chassis 18
There is no longer a situation in which the vehicle suddenly moves backward from forward. still,
The control lever 40 temporarily stopped passes the neutral position by further applying force, and reaches the forward position or the reverse position.

FIG. 3 is a partial plan view of a lever box 38 showing another example of the locking spring 46. In this embodiment, two locking springs 46 are prepared and each of the guide grooves 42 is provided. It is provided exclusively. The locking spring 46 of this example is also configured such that the spring material protrudes near the neutral position of the guide groove 42 to provide resistance, but the resistance when passing from the forward side to the reverse side is higher. The shape is such that it is larger than the opposite case. Since the movement at a stroke from the reverse side to the forward side is not so dangerous, the maneuverability is improved with less resistance.

Although several embodiments of the present invention have been described above, the present invention is not limited to these embodiments.
Various modified embodiments are employed. For example, there are various other structures and shapes of the locking spring for temporarily stopping the control lever. The locking spring may be a bar or the like in addition to the plate. Further, the lever to which the present invention is applied is not limited to the control lever, but may be any lever that moves in the opposite direction by movement between both ends (for example, a lifting / lowering lever of a snow removing unit or a forward / reverse lever of an auger). Applicable. In addition,
It goes without saying that the applicable work machine is not limited to the snow blower.

[0017]

As described above, in the present invention, when the control lever is moved between the forward position and the reverse position, the control lever is temporarily stopped at the neutral position. Absent. Therefore, when the control lever is returned to the neutral position in order to stop the forward movement, a dangerous situation such as excessively moving into the reverse position and the vehicle body suddenly moving backward does not occur.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a lever box showing an example of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partial plan view of a lever box showing another example of the present invention.

FIG. 4 is a side view of a snow blower to which the present invention is applied.

FIG. 5 is a front view of a snow blower to which the present invention is applied.

[Explanation of symbols]

 40 control lever 42 guide groove 44 cross groove 46 locking spring

Claims (4)

[Claims] 1. A control lever guided and moved by a straight guide groove, wherein one end of the guide groove is in a forward position, the other end is in a reverse position, and a middle position is a neutral position. A neutral position temporary stop structure for a control lever, wherein a spring is provided, and the control lever is temporarily stopped at a neutral position under the action of a locking spring when the control lever is moved from at least a forward position to a reverse position. . 2. A plurality of guide grooves are provided side by side.
The neutral position temporary stop structure of the control lever according to claim 1, wherein a cross groove communicating each groove at the neutral position is provided. 3. The structure according to claim 2, wherein the locking spring is formed of one member. 4. The neutral position temporary stop structure according to claim 2, wherein a dedicated locking spring is provided in each guide groove.