JP2001202148A - Work machine clutch lever lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and workability in a snowplow management machine by easily holding a clutch lever in clutch-on state or easily releasing the clutch-on state by simple structure. SOLUTION: In a snowplow 10 having a clutch lever 23 to be operated together with a grip 24 of a handle bar 21 by an operator's one hand and a lock lever 63 capable of holding the clutch lever 23 in clutch-on state at the vicinity of the grip 24. The lever 63 is arranged on the opposite side of the lever 23 with the grip 24 as center so as to be handled by the hand grasping the lever 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch lever lock mechanism for a working machine suitable for holding a clutch lever in a clutch-on position.

[0002]

2. Description of the Related Art As a clutch lever of a working machine, for example, a clutch lever disclosed in Japanese Patent Application Laid-Open No. 63-293208 "Power transmission device for snow removing machine" is known. FIG. 1 of the above publication describes a traveling clutch lever 21 that holds the traveling clutch of the snow blower in a connected state by being gripped together with the handle 4.

[0003]

In the technique disclosed in the above publication,
When the snow blower is traveling, it is necessary to continue to hold the traveling clutch lever 21. When traveling for a long time or when the operating force of the traveling clutch lever 21 is large, hand fatigue becomes large, and hand grip force is increased. Becomes weaker. In such a state, it is conceivable that the traveling clutch lever 21 floats, the connection state of the traveling clutch becomes unstable, and the workability of the snow blower is reduced.

An object of the present invention is to provide a clutch lever lock mechanism of a working machine which can hold a clutch lever at a clutch-on position.

[0005]

In order to achieve the above object, a first aspect of the present invention is to provide a clutch lever which is operated by grasping with a hand near a grip of a handle and a clutch lever which is operated even if the grip is loosened. A work machine with a lock lever that can be held in a state,
The lock lever is arranged on a side opposite to the clutch lever with respect to a grip, and can be operated by a hand for operating the clutch lever.

The lock lever is arranged on the opposite side of the clutch lever with respect to the grip so that the lock lever can be operated by a hand for operating the clutch lever. For example, when the hand holding the clutch lever moves upward, Also, since the lock lever is located on the opposite side of the clutch lever, the hand moves in the direction to press the lock lever,
The clutch lever can be held at the clutch-on position.

According to a second aspect of the present invention, in the vicinity of the handle grip,
A clutch lever lock mechanism for a working machine capable of holding a clutch lever in a clutch-on state even when the grip is loosened by operating the clutch lever by gripping with a hand, wherein the clutch lever lock mechanism includes the clutch A lock plate which is integrally attached to the lever, has a step at the peripheral edge thereof, and has a pin extending from the vicinity of the peripheral portion in parallel with the swing axis; and a lock lever which is swingably attached to a support shaft attached to the handle. When,
One end is mounted at a position away from the support shaft of the lock lever, the intermediate part is mounted on the pin of the lock plate, or the other end is mounted on the peripheral edge of the lock plate, and the other end is connectable to the step. When the clutch lever is swung and gripped with the handle grip, the lock lever is swung to approach the handle grip, so that the lock plate pin serves as a fulcrum and the other of the coupling member is provided. The end is swung, and the other end of the connecting member is connected to the step of the lock plate.

The clutch lever lock mechanism includes a lock plate, a lock lever, and a connecting member,
Swing the clutch lever and hold it with the handle grip, swing the lock lever close to the handle grip, swing the other end of the connecting member around the lock plate pin as a fulcrum, and connect the connecting member to the step of the lock plate. The clutch lever is held at the clutch-on position by connecting the other end of the clutch lever. In addition, the clutch lever is released from the clutch-on state by swinging the lock lever to the original position and releasing the connection between the step of the lock plate and the other end of the connecting member.

Therefore, it is possible to easily maintain the clutch-on position of the clutch lever or release the clutch-on state by the clutch lever with a simple structure.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a side view of a snow blower employing a clutch lever lock mechanism (first embodiment) according to the present invention. A snow blower 10 as a working machine includes a box-shaped chassis 11 and a chassis 11. Engine 12 mounted on 11
A drive shaft 13 connected to an output shaft of the engine 12 via a power transmission mechanism (not shown); drive wheels 14 and 14 (rear sides not shown) attached to both ends of the drive shaft 13; 11, a driven shaft 15 rotatably mounted on the rear portion, driven wheels 16, 16 (not shown on the back side) mounted on both ends of the driven shaft 15, drive wheels 14, 14, and driven wheels 16, 16
And a dozer 18 that attaches to the front of the undercarriage 11 to scrape off the accumulated snow.

The snow blower 10 selects a running state, with a pair of right and left handlebars 21 and 21 (rear side not shown) extending obliquely upward from the rear of the chassis 11 and further extending rearward. Handlebar 21,
An operation unit 22 mounted on an upper part of the operation unit 21, a clutch lever 23 swingably mounted on a handlebar 21 above the operation unit 22, and a handlebar 21 for holding the clutch lever 23 in a clutch-on state. Lever lock mechanism 2 provided near the grip 24
5

FIG. 2 is a side view of the clutch lever lock mechanism (first embodiment) according to the present invention. The clutch lever lock mechanism 25 is integrally mounted on the clutch lever 23 and swings the clutch lever 23. Axis 2
6, a lock plate 31 swingably mounted on the shaft 6, a shaft support 32 provided below the handlebar 21 near the grip 24, and a support shaft 33 mounted on the shaft support 32.
Lock lever 3 attached to this support shaft 33 so as to swing freely
4 and one end portions 36, 36 (rear-side reference numeral 3) at mounting holes 35, 35 (rear-side reference numeral 35 is not shown) opened at a predetermined distance from the support shaft 33 of the lock lever 34.
6 includes a connecting member 37 to which a not-shown member is attached. Reference numeral 38 denotes a bracket for attaching the clutch lever 23 to the handlebar 21. The swing shaft 26 of the clutch lever 23 is attached to the bracket 38.

The lock lever 34 has a grip portion 41 disposed below the grip 24 for gripping, and a stopper for restricting a clockwise swing about the support shaft 33 by contacting the lower portion of the handle bar 21 with the grip portion 41. And a corner 42.

FIG. 3 is a perspective view of a clutch lever lock mechanism (first embodiment) according to the present invention. The lock plate 31 has an arc-shaped peripheral portion 44 and a coupling member 37 at the other end 45. Step 46 provided on the peripheral edge 44 for coupling
And a pin 47 extending parallel to the swing axis 26 of the clutch lever 23 (see FIG. 2) from both sides of the periphery 44 and extending to both sides.

FIG. 4 is a plan view of a clutch lever locking mechanism (first embodiment) according to the present invention, wherein a lock plate 31 is rotatably fitted on a swing shaft 26.
The collar 51 is attached to the clutch lever 23 (see FIG. 2). Thus, the lock plate 31 is attached to the clutch lever 23 via the collar 51.

The connecting member 37 is a member in which the center of the wire is bent in a U-shape and both ends are bent in an L-shape. Lock lever 3
4 is inserted into the mounting holes 35, 35 (see FIG. 2), and the other end 45 bent into a U-shape is connected to the step 46 of the lock plate 31.
(See FIG. 3).

The lock lever 34 and the connecting member 37 are pressed downward by the elastic force of the torsion coil spring 52 by engaging the torsion coil spring 52 fitted on the support shaft 33.

Therefore, in FIG.
Has a clockwise rotation force due to the elastic force of the torsion coil spring 52, and the rotation force causes the stopper corner 42 to hit the lower portion of the handlebar 21, and the grip 41 to grip the grip 2.
Stop at a distance from 4.

The coupling member 37 has a counterclockwise rotational force due to the elastic force of the torsion coil spring 52, and the other end 45 stops in a state of contact with the peripheral edge 44 of the lock plate 31 by this rotational force. I do.

The above-described clutch lever lock mechanism 2
The operation of No. 5 will now be described. FIG. 5 is a first operation diagram for explaining the operation of the clutch lever lock mechanism (first embodiment) according to the present invention. First, in order to transmit power from the engine to the drive shaft, the clutch lever 23 is tilted backward as shown by the arrow, and is gripped together with the grip 24.

Thus, the step 4 of the lock plate 31
Reference numeral 6 moves from the position of the imaginary line to the position of the solid line below the other end 45 of the coupling member 37, and the intermediate portion of the coupling member 37 hits the pin 47.

FIG. 6 is a second operation diagram for explaining the operation of the clutch lever locking mechanism (first embodiment) according to the present invention, in which the lock lever 34 is connected to the clutch lever 23 (FIG. 5).
2), and the state immediately before the other end 45 of the connecting member 37 is connected to the step 46 of the lock plate 31.

FIG. 7 is a third operation view for explaining the operation of the clutch lever locking mechanism (first embodiment) according to the present invention, and shows that the lock lever 34 is completely gripped until it hits the grip 24. .

At this time, the one end 36 of the connecting member 37 is raised, whereby the connecting member 37 is
The other end portion 45 of the coupling member 37 moves downward and moves forward of the step portion 46 of the lock plate 31 because the other end portion 45 of the coupling member 37 is lowered clockwise around the pin 47 while hitting the first pin 47.

Here, when the clutch lever 23 is slightly loosened, the other end 45 of the coupling member 37 is
The clutch lever 23 can be kept at the position shown in the figure for coupling with the first step 46.

Next, a gripping force F3 for gripping the lock lever 34 at this time is determined. Here, the clutch lever 23
F1 is the gripping force when only gripping, and the action point P1 on the clutch lever 23 where the gripping force F1 is applied from the swing shaft 26.
When the clutch lever 23 attempts to return to the original position, the stepping force of the step 46 of the lock plate 31 pulling the coupling member 37 is F2, and the distance from the swing shaft 26 to the step 46 is L2. L3 is the distance between the coupling member 37 and the support shaft 33, and L4 is the distance from the support shaft 33 to the action point P2 on the lock lever 34 where the gripping force F3 of the lock lever 34 is applied.

First, F2 · L2 = F1 · L1 from the relationship of the moment about the swing axis 26.
Therefore, F2 = F1 · (L1 / L2) (1).

From the balance of the moment about the support shaft 33, F3 · L4 = F2 · L3. Therefore, F3 = F2 · (L3 / L4) (2). By substituting the above equation (1) into the equation (2), F3 = F1 · (L
1 / L2) · (L3 / L4). Here, the frictional force of each frictional portion and the elasticity of the torsion coil spring 52 (see FIG. 2) are not considered.

For example, F1 = 36.3N, L1 = 182
mm, L2 = 51 mm, L3 = 2.5 mm, L4 = 50
mm, F3 = 6.5N, and the lock lever 34 can be easily gripped with a small gripping force F3 with respect to the gripping force F1. When releasing the connection between the step 46 of the lock plate 31 and the other end 45 of the connecting member 37, the grip of the grip portion 41 of the lock lever 34 is loosened and the lock lever 34 swings clockwise.

As a result, the one end 36 of the connecting member 37 is lowered, and the connecting member 37 is
The other end 45 of the connecting member 37 rises and the lock plate 31
From the step 46 of FIG.

As described above, according to the present invention, in the vicinity of the grip 24 of the handlebar 21, the clutch lever 23 operated by grasping with the grip 24 by hand and the clutch lever 23 in the clutch-on state even if the grip is released are released. A clutch lever lock mechanism 25 of the management machine 10 (see FIG. 1) which can be held integrally with the clutch lever lock mechanism 25 and formed integrally with the clutch lever 23 and formed with a step 46 at the peripheral edge portion 44. And a lock plate 31 having a pin 47 extending from the vicinity of the peripheral portion 44 in parallel with the swing shaft 26, and a lock lever 34 swingably attached to a support shaft 33 attached to the handlebar 21.
One end 36 is attached to the lock lever 34 at a position away from the support shaft 33, and the intermediate portion is placed on the pin 47 of the lock plate 31 or the other end 45 is placed on the peripheral edge 44 of the lock plate 31, and the like. A coupling member 37 that enables the end portion 45 to be coupled to the step portion 46. When the clutch lever 23 is swung and gripped together with the grip 24 of the handlebar 21, the lock lever 34 is swung to grip the handlebar 21. 24, the other end 45 of the connecting member 37 is swung about the pin 47 of the lock plate 31 as a fulcrum, and the stepped portion 4 of the lock plate 31 is rotated.
6 is characterized in that the other end 45 of the coupling member 37 is coupled.

With the above configuration, the clutch lever 23 is swung and grasped together with the grip 24 of the handlebar 21, the lock lever 23 is swung to approach the grip 24 of the handlebar 21, and the pin 47 of the lock plate 31 is connected as a fulcrum. The other end 45 of the member 37 is swung, and the connecting member 37 is attached to the step 46 of the lock plate 31.
The other end 45 of the clutch lever 23
Can be held in the clutch-on state.

Further, the lock lever 34 is swung to the original position, and the coupling between the step 46 of the lock plate 31 and the other end 45 of the coupling member 37 is released, so that the clutch-on state by the clutch lever 23 is released. be able to. Therefore, it is possible to easily hold the clutch-on position of the clutch lever 23 or release the clutch-on state by the clutch lever 23 with a simple structure. Therefore, the operability and workability of the management device 10 can be improved.

FIG. 8 is a side view of a clutch lever locking mechanism (second embodiment) according to the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The clutch lever lock mechanism 60 includes a shaft support 61 attached to a lower portion of the handlebar 21 in front of the grip 24, a support shaft 62 mounted on the shaft support 61, and a lock lever swingably mounted on the support shaft 62. 63
And a torsion coil spring 64 fitted on the support shaft 62 to apply a clockwise rotational force to the lock lever 63.

The lock lever 63 has a grip portion 65 for gripping with the grip 24, a projection 66 which becomes a stopper by being brought into contact with the handlebar 21 in front of the support shaft 62,
A U-shaped coupling portion 6 attached to the front of the projection 66 for coupling to the step 46 provided on the peripheral edge portion 44 of the lock plate 67 integrally attached to the clutch lever 23.
8 Reference numeral 68a denotes a tip of the coupling portion 68.

The clutch lever lock mechanism 6 described above
The operation of 0 will now be described. FIG. 9 is an operation diagram for explaining the operation of the clutch lever lock mechanism (the second embodiment) according to the present invention. First, the clutch lever 23 is tilted backward and gripped with the grip 24.

Next, the grip portion 65 of the lock lever 63 is gripped together with the clutch lever 23 and the grip 24. At this time, the tip 68a of the lock lever 63 moves down and moves forward of the step 46 of the lock plate 67.

When the clutch lever 23 is slightly loosened, the tip 68a of the lock lever 63 is connected to the step 46 of the lock plate 67.
3 can be left in the position shown.

To release the connection between the step 46 of the lock plate 67 and the tip 68a of the lock lever 73, the grip of the grip 65 of the lock lever 73 is loosened. As a result, the lock lever 73 is moved to the torsion coil spring 64.
Swings clockwise by the elastic force of the lock lever 73, the tip 68a of the lock lever 73 rises, and the tip 68a comes off the step 46.

FIG. 10 is a side view of a clutch lever lock mechanism (third embodiment) according to the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted. The clutch lever 23 has a swing shaft 26
And a lock pin 23a extending in parallel with.

The clutch lever lock mechanism 70 includes a shaft support 71 mounted on the handlebar 21 and the shaft support 7.
1, a lock lever 73 swingably mounted on the support shaft 72, and a lock lever 73
And a handlebar receiving portion 74 attached to the lower portion of the handlebar 21 for controlling the clockwise swing of the lock lever 73 by receiving the intermediate portion of the handlebar, and a handlebar receiving portion for applying a clockwise rotational force to the lock lever 73. And a coil spring 75 provided in the portion 74. Lock lever 73
Is a grip portion 76 for gripping with the grip 24.
And a coupling portion 77 for coupling to the lock pin 23a of the clutch lever 23.

The clutch lever lock mechanism 7 described above
The operation of 0 will now be described. FIG. 11 is an operation diagram illustrating the operation of the clutch lever locking mechanism (third embodiment) according to the present invention. First, the clutch lever 23 is tilted backward and gripped with the grip 24.

Next, the grip portion 76 of the lock lever 73 is gripped together with the clutch lever 23 and the grip 24. As a result, the connecting portion 77 of the lock lever 73 moves forward of the lock pin 23a of the clutch lever 23.

Here, when the clutch lever 23 is slightly loosened, the lock pin 23a of the clutch lever 23 is connected to the connecting portion 77 of the lock lever 76, so that the clutch lever 23 can be kept at the position shown in the figure.

The lock pin 2 of the clutch lever 23
To release the connection between 3a and the connecting portion 77 of the lock lever 73, the grip of the grip portion 76 of the lock lever 73 is released. As a result, the lock lever 73 is
Swings clockwise due to the elastic force of, and the connecting portion 77 is disengaged from the lock pin 23a.

As described above with reference to FIGS. 7, 9 and 11, the present invention provides a clutch lever 23, which is operated by grasping with the grip 24 by hand, near the grip 24 of the handlebar 21. Is a management machine 10 (see FIG. 1) provided with lock levers 34, 63, and 73 that can hold the clutch lever 23 in the clutch-on state even when the grip is released.
63, 73, the clutch lever 2
3 is arranged on the opposite side to be operated by a hand for operating the clutch lever 23.

With the above configuration, for example, even if the hand holding the clutch lever 23 moves upward, the hand moves in the direction of pressing the lock levers 34, 63, 73, so that the clutch lever 23 is in the clutch-on state. Position. Therefore, the operability and workability of the working machine can be improved.

The clutch lever lock mechanism 2 of the present invention
5, 60 and 70 are not limited to snow removal machines, but may be applied to other working machines having a clutch.

[0049]

According to the present invention, the following effects are exhibited by the above configuration. In the clutch lever lock mechanism for the working machine according to the first aspect, the lock lever is arranged on the opposite side of the clutch lever with respect to the grip and can be operated by the hand that operates the clutch lever. Even if the hand moves upward, the hand moves in the direction of pressing the lock lever, so that the clutch lever can be held at the clutch-on position. Therefore,
Operability and workability of the work machine can be improved.

A clutch plate lock mechanism for a working machine according to claim 2, wherein the lock plate is integrally attached to the clutch lever, has a step formed on the peripheral edge thereof, and has a pin extending from the vicinity of the peripheral edge in parallel with the swing axis. A lock lever swingably mounted on a support shaft mounted on the handle, and one end mounted at a position away from the support shaft of the lock lever, and an intermediate portion mounted on a pin of the lock plate or the other end mounted on the lock plate. And a coupling member that allows the other end to be coupled to the stepped portion, so that the clutch lever is swung and grasped together with the handle grip, and the lock lever is swung to approach the handle grip, Swing the other end of the connecting member with the pin of the lock plate as a fulcrum, and connect the other end of the connecting member to the step of the lock plate. In Rukoto can hold the clutch lever to the clutch-on state.

The clutch lever can be released from the clutch-on state by swinging the lock lever to the original position and releasing the connection between the step of the lock plate and the other end of the connecting member. Accordingly, it is possible to easily hold the clutch-on position of the clutch lever or release the clutch-on state by the clutch lever with a simple structure. Therefore, the operability and workability of the working machine can be improved.

[Brief description of the drawings]

FIG. 1 shows a clutch lever lock mechanism (first embodiment) according to the present invention.
Side view of a snow blower adopting an embodiment of the present invention)

FIG. 2 shows a clutch lever lock mechanism (first embodiment) according to the present invention.
Embodiment) side view

FIG. 3 is a clutch lever lock mechanism (first embodiment) according to the present invention.
Embodiment) Perspective view

FIG. 4 is a clutch lever lock mechanism (first embodiment) according to the present invention.
Plan view of the embodiment)

FIG. 5 is a clutch lever lock mechanism according to the present invention (first embodiment);
First action diagram for explaining the action of the second embodiment)

FIG. 6 shows a clutch lever lock mechanism (first embodiment) according to the present invention.
FIG. 2 is a second operation diagram illustrating the operation of the second embodiment.

FIG. 7 is a clutch lever lock mechanism (first embodiment) according to the present invention.
FIG. 3 is a third operation diagram illustrating the operation of the second embodiment).

FIG. 8 shows a clutch lever lock mechanism (second embodiment) according to the present invention.
Embodiment) side view

FIG. 9 shows a clutch lever lock mechanism (second embodiment) according to the present invention.
Action diagram for explaining the action of the embodiment)

FIG. 10 is a side view of a clutch lever lock mechanism (third embodiment) according to the present invention.

FIG. 11 is an operation diagram illustrating the operation of a clutch lever lock mechanism (third embodiment) according to the present invention.

[Explanation of symbols]

10 working machine (management machine), 21 handle (handle bar), 23 clutch lever, 24 grip, 25,
60, 70: clutch lever lock mechanism, 26: swing shaft, 31: lock plate, 33: support shaft, 34, 6
Reference numerals 3, 73: lock lever, 36: one end, 37: connecting member, 44: peripheral edge, 45: other end, 46: step, 47 ...
pin.

Claims (2)

[Claims] A clutch lever is provided near a grip of a handle, the clutch lever being operated by grasping with the grip with a hand, and a lock lever capable of holding the clutch lever in a clutch-on state even when the clutch lever is loosened. A work machine, wherein the lock lever is arranged on a side opposite to the clutch lever with respect to a grip, and can be operated by a hand for operating the clutch lever. 2. A clutch lever for operating a clutch lever in the vicinity of a grip of a handle, the clutch lever being operated by grasping with the grip by hand, and a clutch lever of a working machine capable of holding the clutch lever in an on state even when the clutch lever is loosened. A lock mechanism, wherein the clutch lever lock mechanism is integrally mounted on the clutch lever, has a step formed on a peripheral edge thereof, and has a pin extending from the vicinity of the peripheral edge in parallel with a swing axis of the clutch lever. A plate, a lock lever swingably mounted on a support shaft mounted on the handle, and one end mounted at a position away from the support shaft of the lock lever, and an intermediate portion mounted on a pin of the lock plate or the other end. And a connecting member for mounting the other end on the peripheral portion of the lock plate and further connecting the other end to the step portion. When the switch lever is swung and gripped with the handle grip, the lock lever is swung to approach the grip of the handle, so that the other end of the coupling member is swung around the pin of the lock plate as a fulcrum, and the lock plate is A clutch lever lock mechanism for a working machine, wherein the other end of the coupling member is coupled to the step.