JP2593460Y2 - Speed change device for wheel loader - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift operation device for a four-wheel-driven wheel loader having a working machine such as a shovel at a front portion of a vehicle body.

[0002]

2. Description of the Related Art As shown in FIG. 6, a wheel loader has a swingable and vertically movable working machine 2 such as a shovel at a front portion of a vehicle body 1, and the vehicle body 1 is a four-wheel tire. 3 is free to run. Then, the earth and sand 4 and the like are scooped into the work machine 2 while the body 1 is moved forward, and the earth and sand 4 in the work machine 2 are discharged to, for example, a truck bed while the body 1 is moved backward. In order to perform these operations, the vehicle body 1 of the wheel loader is provided with a shift lever 11 for switching the forward or backward vehicle speed to a plurality of speeds, a steering wheel 12 for turning the vehicle body 1 , and a working machine for operating the working machine 2. A shift operation device including a lever 13 and the like is provided.

[0003] In such a wheel loader, for example, when the earth and sand 4 is scooped into the work machine 2 and carried into a dump truck (not shown), the work machine lever 13 is operated with the right hand to control the posture of the work machine 2. Handle 1 with left hand
2 to control the traveling direction of the wheel loader. On the other hand, when transporting the earth and sand 4, it is necessary to switch from forward movement to reverse movement, and when rushing into and retreating from the earth and sand 4, it is necessary to switch the vehicle speed stage from high speed to low speed or from low speed to high speed. In this case, the right hand is on the work implement lever 13 and the left hand is on the handle 12 and is closed, so that the shift lever 11 is difficult to switch between forward and reverse and the vehicle speed.

A conventional example of a shift operation device having such a shift lever will be described with reference to FIG. 4, shift lever 11 is alongside the handle base, and forward swinging the handle surface and the flat ascending plane (F) reverse (R) is switched, it is rotated faster fourth-speed (4) , To the low speed to the first speed (1), so that the shift lever 11 can be used to switch between forward and reverse and the vehicle speed. The shift lever 11 switches the hydraulic clutch 22 via the control device 20 and the electromagnetic valve device 21. The hydraulic clutch 22 is provided between the four wheels 23 and the torque converter 24, and the torque converter 24 is driven by the engine 25. The main pump 26 is connected to the engine 25 via gears. Reference numeral 12 denotes a steering wheel which turns the vehicle body in a predetermined direction via the four wheels 23. Reference numeral 13 denotes a working machine lever which operates a working machine 27 driven by hydraulic pressure from a main pump 26. An accelerator pedal 14 controls the number of revolutions of the engine 25. A brake pedal 15 brakes the four wheels 23. 28 is an operation panel.
Reference numeral 16 denotes a shift-down switch provided on the grip portion 13a of the work implement lever 13, which switches the vehicle speed to a low speed, for example, when the vehicle enters the earth and sand via the control device 20 and the electromagnetic valve device 21.

FIG. 5 is a view showing another conventional shift lever. The shift lever includes a first lever 11a and a second lever 11b.
It consists of When the first lever 11a is swung in a plane substantially parallel to the handle surface, forward (F) and reverse (R) are switched, and when the second lever 11b is swung in a plane substantially parallel to the handle surface, the fourth speed (4) is set. ) To low speed first speed (1). The first lever 11a and the second lever 11b are arranged near the knob of the handle 12, and can be operated with the fingertip of the hand on the knob.

[0006]

In the rotary shift lever 11 described with reference to FIG. 4, it is necessary to pick the shift lever 11 by hand in order to switch the vehicle speed by rotating the shift lever.
Therefore, when switching the vehicle speed stage during traveling, there is a problem that it is necessary to release the right hand from the work implement lever 13 and to change the handle 12 from the left hand to the right hand. Further, in the two-type shift levers 11a and 11b described with reference to FIG. 5, although they can be operated with the fingertips without releasing the hand from the handle 12, the shift from the first speed to the third or fourth speed or from the third to fourth speed to the first There is a problem that the possibility of erroneous operation is high.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to change the speed of a wheel loader which does not require releasing the handle from the handle and which is less likely to malfunction. An operation device is not provided.

[0008]

Means for Solving the Problems According to claim 1 of the present invention
That the speed change device of a wheel loader, a handle for the vehicle換向, forward / backward is provided to the handle base
A shift operation device for a wheel loader including a shift lever for switching a position and a vehicle speed stage, and a work implement lever provided separately from the shift lever to operate a work implement,
The gearshift lever is on one hand while holding the handle.
Swing in a plane parallel to the handle surface by fingertip operation
It is possible to switch to the forward or reverse position, and
Forward or backward by the fingertip operation of said one hand in the forward or reverse position
Push and pull to the return position in the handle plane and vertical plane
The vehicle speed is switched by the number of times.
Handle base on the working machine lever side facing the speed lever
Is provided with an auxiliary lever separately.
The other hand while holding the handle with one hand
Return position by hand in the vertical plane with respect to the handle surface
The vehicle speed is switched by the number of push and pull
It is.

Further , according to a second aspect of the present invention,
The shift operation device of the roller (in claim 2) is a
And a handle provided at the base of the handle for forward /
A shift lever for switching the reverse position and the vehicle speed,
Work for operating the work equipment that is provided separately from the speed lever
Transmission operation device of a wheel loader equipped with a machine lever.
And the shift lever is in one of the states
By the fingertip operation of the hand in the plane parallel to the handle surface
It is possible to switch to the forward or reverse position by rocking.
The fingertip operation of the one hand in the forward or reverse position.
The return position in the vertical plane with the handle surface
It is configured to switch the vehicle speed by the number of push and pull .
Near the brake pedal of the vehicle body,
The auxiliary speed change pedal is provided separately.
Swing back and forth with respect to the return position by operating the foot
The vehicle speed is switched according to the number of movements.

[0010]

According to a first aspect of the present invention, there is provided a speed change operating device for a wheel loader.
Is operated by the fingertip of one hand while holding the steering wheel.
Swing and push / pull of the gearshift lever to continuously move forward and forward
Or you can switch to the reverse position.
Operation is possible without releasing your hand
The vehicle speed stage is determined and there are few malfunctions. Also separate from gearshift
The auxiliary shift lever is provided in the way, so handle with one hand
While firmly operating the other hand temporarily the work machine lever
, And by operating this auxiliary shift lever,
Speed stage without interfering with steering wheel operation
Can be switched.

Further , the speed change operation of the wheel loader according to the second aspect is provided.
With the device, the fingertip operation of one hand while holding the handle
The shift lever is swung and pushed and pulled by the
Can be switched between forward and reverse positions.
It is possible to operate without releasing your hands from the dollar, push and pull
The speed is determined by the number of times, and there are few malfunctions. Also, the gear lever
-An auxiliary shifting pedal is provided separately from the
While operating the handle firmly with both hands, with your playing feet
Operating the auxiliary speed change pedal may interfere with steering wheel operation.
The vehicle speed can be switched without giving the vehicle speed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a shift lever in a shift operation device of a wheel loader according to the present invention.

In FIG. 1, the speed change lever 5 comprises a grip portion 5a and a shaft 5b, and an end of the shaft 5b forms a support portion 6. Then, the support part 6, relative to the handle base 12a, as well as a pivotable with the handle surface and the flat ascending plane, are the push pull free the handle surface and vertical inside face. Also, two spring members 8, 8 are mounted in the cavity 7 of the handle base 12a, and the shaft 5b of the speed change lever 5 is located between the spring members 8, 8, so that the shaft 5b will stay in the horizontal position shown in the figure. It is a self-return type. Further, switches 9 and 10 are provided in the cavity 7, and the shaft 5 b of the shift lever 5 serves as an operating piece for the switches 9 and 10.
The grip 5a of the shift lever 5 is pressed against the spring members 8,8,
When the user pulls to the position A by operating the fingertip of the left hand while the handle 12 is gripped , the switch 9 is operated, and the control device 20 determines that the vehicle speed is increased by one. On the contrary, the grip portion 5a of the shift lever 5 is gripped by the handle 12 against the spring members 8,8.
When the switch is pressed to position B with the fingertip operation of the left hand in the
0 operates, and the control device 20 determines that the vehicle speed is lowered by one. That is, the state where the handle 12 is held with the left hand
When the finger is operated twice at the first speed, it switches to the third speed. When the finger is pressed twice at the third speed by a fingertip operation, the speed is switched to the first speed. Less malfunction due to sequential switching. The current vehicle speed is displayed on the liquid crystal display 28a of the operation panel 28.
At the time of deceleration or acceleration, it is possible to judge at a glance how many times to push and pull. It is to be swingable in the handle surface and the flat ascending plane, stable structure of the shift lever 5 stops by in front position location of the forward position or the reverse (R) forward (F) is Ya spring member 8,8 entire casing of the switch 9, 10 can be a conventional structure similar by the pivotably to the handle base 12a, forward or
It is also possible to sequentially switch the vehicle speed stage at the reverse position
You.

[0014] Figure 2, in addition to the shift lever 5 described above, the
Handle on the work machine lever 13 side facing the shift lever 5
An auxiliary speed change lever 30 is separately provided on the base 12a . The auxiliary shift lever 30 is also used as a turn signal lever, and has a shaft and a support portion similar to those of the shift lever 5 in FIG. In this case, while the firm operating the handle 12 with the left hand, temporarily working machine lever right hand 13
, And operate the auxiliary shift lever 30. Sand
According to the relationship with the operation state of the work implement lever 13,
During the operation of the machine lever 13, mainly the shift lever 5
When the industrial machine lever 13 is not operated,
The shift operation can be performed flexibly by the bar 30 . Also, auxiliary changes
While operating the speed lever 30, hold the handle 12 with your left hand.
Impact given the pictorial, while performing a handle 12 operation smoothly
The vehicle speed can be switched.

FIG. 3 shows a vehicle in addition to the gearshift lever 5 described above.
Auxiliary transmission pedals 3 near both brake pedals 15
1 is provided. This auxiliary transmission pedal 31 is
2, and can return to the illustrated position by a spring member (not shown). When the foot swings forward once, the vehicle speed step increases by one, and when the foot swings backward once, the vehicle speed step decreases by one. Also in this case, the auxiliary shift pedal 31 is operated with the idle left foot while operating the handle 12 firmly with the left hand or both hands . Shift lever 5 or auxiliary shift pedal 31
The shift operation can be performed flexibly. Also, handle 1 with your left hand
2. While firmly grasping 2, operate the work equipment lever 13 with your right hand.
At the same time, operate the auxiliary shift pedal 31 with the left foot
Can be done.

[0016]

[Effect of the Invention] The speed change operation device of the wheel loader of the present invention.
In the shift lever, as well as a pivotable with the handle surface and the flat ascending plane, a push-pull freely against self return position in the handle surface and vertical inside faces, one of the hand gripping the handle
It is switched to the forward or reverse position by swinging by the fingertip operation of the vehicle, and the speed stage is switched by the number of push and pull, and can be operated with the fingertip without releasing one hand from the steering wheel Since the vehicle speed is determined by the number of times of pushing and pulling and there are few malfunctions, the operation is easy. In addition to this shift lever, the fingertip operation of the other hand is
An auxiliary shift lever that switches the vehicle speed
While holding the steering wheel firmly with one hand,
Release your hand temporarily from the implement lever, and
The steering wheel with one hand.
The vehicle speed can be switched without any obstacles.

Further , the speed change operation device of the wheel loader of the present invention.
When the gearshift lever is in the
And self-return position in the vertical plane with the handle surface
Can be pushed and pulled against
Swing by fingertip operation to move forward or backward
The speed is switched according to the number of push and pull.
Do not release one hand from the handle
It can be operated with fingertips, and the speed stage is determined by the number of pushes and pulls.
Operation is easy because there are few erroneous operations. And this strange
In addition to the speed lever, step on the vehicle near the brake pedal.
An auxiliary shift pedal that switches the vehicle speed
Operate the handle securely with one or both hands
While operating the auxiliary shift lever with the foot
By doing so, the vehicle speed
Can be switched.

[Brief description of the drawings]

FIG. 1 is a view showing a shift operation device of a wheel loader of the present invention.

FIG. 2 is a view showing a shift operation device of another wheel loader of the present invention.

FIG. 3 is a view showing a shift operation device of another wheel loader of the present invention.

FIG. 4 is a view showing a conventional shift operation device of a wheel loader.

FIG. 5 is a view showing another conventional shift operation device of a wheel loader.

FIG. 6 is an external view of a wheel loader.

[Description of Signs] 5 shift lever 12 handle 13 work implement lever 30 auxiliary shift lever 31 auxiliary shift pedal

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60K 20/00-20/08 F16H 59/00-59/12

Claims (2)

(57) [Scope of request for utility model registration] 1. A handle for turning a vehicle body, a shift lever provided on the handle base for switching between forward / reverse positions and vehicle speeds, and a shift lever provided separately from the shift lever for operating a work machine. A speed change device for a wheel loader having a work implement lever, wherein the speed change lever is moved forward by a fingertip operation of one hand in a state where a handle is held.
Forward or backward position by swinging in the plane parallel to the handle surface
And the fingertip operation of the one hand in the forward or backward position.
To the return position in the plane perpendicular to the handle surface.
The vehicle speed is switched according to the number of pulls, and a hand on the working machine lever side facing the shift lever is provided.
An auxiliary lever is separately provided at the base of the handle , and the auxiliary lever is in a state where the handle is gripped by the one hand.
With the other hand, the return in the vertical plane with the handle surface
Switching the vehicle speed by the number of push and pull for the return position
Shift operating device of the wheel loader, characterized in that a formed. 2. A steering wheel for turning a vehicle body,
It is provided at the base of the dollar to cut forward / reverse position and vehicle speed.
A shift lever to be changed, and a shift lever provided separately from the shift lever.
Wheel with work equipment lever for operating industrial equipment
In the speed change operation device of the loader, the speed change lever is moved forward by a fingertip operation of one hand in a state where the handle is gripped.
Forward or backward position by swinging in the plane parallel to the handle surface
And the fingertip operation of the one hand in the forward or backward position.
To the return position in the plane perpendicular to the handle surface.
The vehicle speed is switched according to the number of pulls, and an auxiliary shift pedal is provided near the brake pedal of the vehicle body.
The auxiliary speed change pedal is provided separately , and is operated by the operation of the foot depressing the pedal.
The vehicle speed is switched according to the number of forward / backward swings to the return position.
Speed change of the wheel loader
Operating device.