JPH0452291Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to operating devices for construction machinery such as hydraulic excavators and hydraulic cranes, and in particular, the invention relates to operating devices for construction machinery such as hydraulic excavators and hydraulic cranes, and in particular, the invention relates to operating devices for construction machinery such as hydraulic excavators and hydraulic cranes. , relates to a removable operating device.

[Prior art]

Conventional operating devices are shown in FIGS. 6 to 13, taking a traveling operating device for a hydraulic excavator as an example.

In the figure, 1 is a floor plate provided on the bottom of the driver's seat of the hydraulic excavator, and 2 and 2 are foot pedals for foot operation that are swingably disposed on the floor plate 1. In order to attach the pedal 2 to a link member 7, which will be described later, a mounting portion 2A is provided in a flat plate shape, and bolt insertion holes 2B, 2B are provided in the mounting portion 2A.
is drilled. Also, on the back side of the pedal 2, there is a seat part 2C for attaching a manual lever 3, which will be described later.
is provided, and the seat portion 2C is provided with screw holes 2D, 2D.
is provided. 3, 3 are manual levers for manual operation, each lever 3 is bent into a substantially dogleg shape;
A square columnar mounting member 3B is fixed to the tip of the lower bent portion 3A by means such as welding. and,
Bolt insertion holes 3C, 3C are bored in each mounting member 3B, and each manual lever 3 is connected to each leg by bolts 4, 4, which are inserted into each bolt insertion hole 3C and screwed into each screw hole 2D. It is fixed to the seat portion 2C of the foot pedal 2.

Brackets 5, 5, ... are fixed to the back surface of the floorboard 1 and protrude downward, and the brackets 5 are arranged at predetermined intervals, and the bracket 5 located in the center of the brackets 5 is attached to a bolt. 6 to the back surface of the floorboard 1. Reference numerals 7 and 7 denote link members rotatably supported by each bracket 5 via a connecting pin 8, and each link member 7 is connected to a boss portion 7A disposed between each bracket 5 via a connecting pin 8. , a flat link part 7B projecting downward from the boss part 7A, and a flat link part 7C projecting upward from the boss part 7A,
The arm portion 7D is provided on the distal end side of the link portion 7C and is formed of a flat plate-shaped arm portion 7D bent in an L-shape.
Screw holes 7E, 7E corresponding to each bolt insertion hole 2B of the foot pedal 2 are bored in D. Bolts 9, 9 are screwed into each screw hole 7E through each bolt insertion hole 2B, and the foot pedal 2 is attached to the arm portion 7D of each link member 7 by means of each bolt 9. It is attached through. On the other hand, a bolt insertion hole 7 is provided on the tip side of each link portion 7B.
F, 7F are drilled, and each link portion 7 is inserted through bolts 10, 10 inserted into each bolt insertion hole 7F.
One ends 11A, 11A of rods 11, 11 are connected to B. The other end of each rod 11 is connected to a control valve mechanism of a traveling motor (not shown).

In the operating device configured in this way, by depressing each foot pedal 2 or manually operating each manual lever 3, each link member 7 is rotated about the connecting pin 8, and the foot pedal The operating force from the manual lever 2 or manual lever 3 is transmitted to the control valve mechanism via each rod 11, and the valve opening degree of the control valve mechanism is adjusted to appropriately change the running speed of the hydraulic excavator and to move the hydraulic excavator forward. , reverse, stop, etc. When one of the foot pedals 2 and manual levers 3 is operated, the direction of the hydraulic excavator can be changed to the left or right as appropriate.

By the way, although the above-mentioned conventional technology has the advantage that the traveling operation of the hydraulic excavator can be performed appropriately by selectively operating each foot pedal 2 and each manual lever 3, some customers may There are cases where the user uses only one of the foot pedal 2 and the manual lever 3, and requests that the other be removed because it is in the way. In this case, each manual lever 3 is attached to the seat part 2C of each foot pedal 2 via each bolt 4, so it can be easily removed by removing each bolt 4, and each foot pedal 2 allows the hydraulic excavator to be operated.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional technology, each manual lever 3 is attached to each link member 7 via each foot pedal 2, so it is difficult for customers who wish to remove the foot pedal 2 and use only the manual lever 2 to use only the manual lever 2. The drawback is that it cannot meet requests. If unnecessary foot pedals 2 are left, there is a drawback that an operator who is not familiar with the foot pedals 2 may carelessly press the foot pedals 2 and cause operational errors.

The present invention has been developed in view of the above-mentioned drawbacks of the prior art.The present invention allows the manual lever and the foot pedal to be selectively attached and removed according to the customer's requests. An object of the present invention is to provide an operating device that allows a hydraulic excavator to be easily operated by operating a pedal appropriately.

[Means for solving problems]

The feature of the means adopted by the present invention in order to solve the above-mentioned problems is that the manual lever and the foot pedal are each detachably attached to the link member.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5. In the embodiment, the same components as those of the prior art shown in FIGS. 6 and 7 described above are given the same reference numerals, and the explanation thereof will be omitted.

1 to 3 show a first embodiment of the present invention.

In the figure, reference numeral 21 denotes a foot pedal for foot operation, and the pedal 21 is formed almost the same as the foot pedal 2 used in the prior art, and has a mounting portion 21A on the back side.
is protrudingly provided in the shape of a flat plate, and two bolt insertion holes (not shown) are bored in the mounting portion 21A. 22
2 is a manual lever for manual operation, and this lever 22 is also formed in substantially the same manner as the manual lever 3 used in the prior art, with a bent portion 22A on the lower end side extending somewhat long. A square columnar mounting member 22B is fixed to the tip of the bent portion 22A.
Two bolt insertion holes (not shown) are bored in the.

Reference numeral 23 denotes a link member rotatably supported by each bracket 5 via a connecting pin 8, and the link member 23, like the link member 7 used in the prior art,
Boss part 23A, link part 23B, link part 23C
However, first and second arm portions 23D and 23E are provided in a bifurcated shape on the distal end side of the link portion 23C. Here, the first arm 2
3D is formed to be bent forward from the link portion 23C at a substantially right angle, and the second arm portion 23E is bent at approximately the same angle with respect to the first arm portion 23D and the link portion 23C. The arm part 23D is inclined upward in the opposite direction to the arm part 23D of the first arm part 23D and protrudes in a flat plate shape. The first arm portion 23D is provided with screw holes 23F, 23F in the thickness direction, and the second arm portion 23E is provided with screw holes 23G, 23G in the width direction. A foot pedal 21 and a manual lever 22 are attached to the first and second arm portions 23D and 23E by bolts 9 and 4, respectively, through screw holes 23G.

Further, the boss portion 23A of the link member 23 is rotatably supported by each bracket 5 via the connecting pin 8, and a bolt insertion hole 2 is provided at the distal end side of the link portion 23B.
3H is drilled. Then, the link portion 23
One end 1 of the rod 11 is inserted into the bolt insertion hole 23H of B.
1A are connected by bolts 10. Note that the foot pedal 21, the manual lever 22, and the link member 23 are arranged in pairs in parallel, similar to the foot pedal 2, the manual lever 3, and the link member 7 used in the prior art, so that the hydraulic excavator cannot run smoothly. It is now possible to change direction.

The operating device according to this embodiment has the configuration as described above, and its basic operation is not particularly different from that of the prior art.

However, in this embodiment, the first and second arm portions 23D, 23E are provided in a bifurcated manner on the distal end side of the link portion 23C of the link member 23, and the respective arm portions 23D, 23
Since the foot pedal 21 and the manual lever 22 are attached to E by the respective bolts 9 and 4, one of the foot pedal 21 and the manual lever 22 can be removed as appropriate according to the customer's request. It is possible to reliably eliminate situations where operational errors occur. The traveling operation of the hydraulic excavator can be executed as appropriate by each foot pedal 21 or each manual lever 22.

FIG. 4 shows a second embodiment of the present invention, and the feature of this embodiment is that the servo valve, which constitutes a part of the control valve mechanism, is directly connected to the link member. In this embodiment, the same reference numerals are given to the constituent elements as in the first embodiment, and the explanation thereof will be omitted.

In the figure, 31 is a link member, and the link member 31
is a link portion 31A whose base end side is connected to a servo valve 33, which will be described later, via a movable shaft 32 as a connecting pin.
and a first arm part 31B and a second arm part 31C provided in a fork shape on the distal end side of the link part 31A, and the first arm part 31B and the second arm part 31C are The arm portions 23D and 23E of the link member 23 used in the first embodiment are formed similarly.
A foot pedal 21 and a manual lever 22 are attached to the respective bolts 9 and 4 of the arm portions 31B and 31C, respectively.
installed by. Reference numeral 33 denotes a servo valve constituting a part of the control valve mechanism. The servo valve 33 is fixed to the floor plate 1 and directly connected to the link member 31 via the rotation shaft 32. The servo valve 33 is connected to the foot pedal 21 or the manual lever 22.
The motor is operated by the motor to switch the switching control valve of the travel motor provided in the main circuit.

Also in this embodiment configured in this way, the first
Almost the same effects as in the embodiment can be obtained.

FIG. 5 shows a third embodiment of the present invention, and the feature of this embodiment is that a foot pedal and a manual lever are pin-coupled to the arm portion of the link member.

In the figure, reference numerals 41, 41 are foot pedals for foot operation, and each foot pedal 41 is formed almost the same as the foot pedal 21 used in the first embodiment, but the central part on the back side has a pair of mounting parts 41A, 4
1A projecting in a flat plate shape at predetermined intervals, and an engagement groove 41B that can be engaged with an engagement portion 46E of a link member 46, which will be described later, is provided on the upper side. Two pins 42 (however, only one pin 42 is shown in the figure) are inserted into each mounting portion 41A in a direction perpendicular to the drawing, and each of the pins 42 connects each foot pedal. 41 is connected to each link member 46 by a pin. Additionally, a split pin 4 is provided at the tip of each pin 42.
3 and 43 are fitted to prevent each pin 42 from coming off.

44, 44 are manual levers for manual operation, each manual lever 44 is formed almost the same as the manual lever 22 used in the first embodiment, and the lower end side has a bent part 22A of the manual lever 22. A long bent portion 44A is provided, and a flat plate-shaped mounting member 44B is fixed to the tip of each bent portion 44A by means such as welding. Each mounting member 44B is located between each of the mounting portions 41A and is mounted to each link member 46 by each pin 42. In addition, each mounting member 44B has a set screw 4.
5 and 45, each pin 42 is connected as shown in FIG.
It is designed to be positioned against.

Further, 46, 46 are link members rotatably supported by each bracket 5 via a connecting pin 8, each link member 46 is formed almost the same as the link member 7 used in the prior art, and has a boss portion. 46A,
Link parts 46B, 46C and arm part 46D are provided. The pins 42 are inserted into the arm portion 46D, and the link members 46 are connected to the foot pedal 41 and the manual lever 44 by pins, respectively. Each link member 46 also has an arm portion 46.
Engagement portions 46E, 46E are protruded above D, and each engagement portion 46E is connected to the engagement groove 41 of each foot pedal 41.
By engaging with B, the position of each foot pedal 41 is determined. On the other hand, each link portion 46B is connected to one end 11A of each rod 11 by each bolt 10.

Although the present embodiment configured in this way can obtain almost the same effects as the first embodiment, in particular, in this embodiment, when each manual lever 44 is removed, each pin 42 must be removed. After pulling out and removing each manual lever 44, each pin 42 is reinstalled, and the engaging portion 46E of each link member 46 is inserted into the engaging groove 4.
1B, each foot pedal 41 can be reliably positioned with respect to each link member 46. In addition, when removing each foot pedal 41, each pin 42 is removed and each foot pedal 41 is removed, and each pin 42 is then reinstalled to connect the mounting member 44B of each manual lever 44 and each link member 46. If each mounting member 44B is fixed to each pin 42 by each set screw 45, each manual lever 44 can be reliably positioned with respect to each link member 46. I can do it.

In each of the above embodiments, explanations have been given by taking the operating device for traveling of a hydraulic excavator as an example, but the present invention is not limited to this, and may be applied to operating devices other than for traveling, and can be applied to operating devices such as hydraulic cranes. It can also be applied to various construction machines. In addition, foot pedals 21, 41, manual levers 22, 44, link members 23, 31, 4
It is not necessarily necessary to provide two 6th class.

[Effect of idea]

As detailed above, according to the present invention, the manual lever and the foot pedal are individually detachably attached to the link member, so the manual lever and the foot pedal can be appropriately selected according to the customer's request. This can reliably prevent a situation where an operator who is not familiar with manual levers or foot pedals operates them carelessly and causes operational errors. Then, by selectively operating the manual lever or foot pedal,
Various operations such as running the hydraulic excavator can be performed as appropriate.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is an external view of the main part showing the operating device, and FIG.
The figure is a front view of the link member shown in Figure 1, Figure 3 is a right side view of Figure 2, Figure 4 is an external view of the main parts of the operating device showing the second embodiment of the present invention, The figure shows a third embodiment of the present invention, an external view of the main parts of the operating device shown from the back side, FIGS. 6 to 13 show the prior art, and FIG. 6 is an external view of the main parts of the operating device, 7th
The figure is a left side view of FIG. 6 showing the external appearance of the main parts like FIG. 5, FIG. 8 is a back view of the foot pedal shown in FIG. 7, and FIG. 9 is a right side view of FIG. 8. Figure 10 is the 7th
The external view of the manual lever shown in the figure, Figure 11 is
0 is a right side view, FIG. 12 is an external view of the link member shown in FIG. 7, and FIG. 13 is a right side view of FIG. 12. 1... Floor plate, 4, 9... Bolt, 5... Bracket, 8... Connecting pin, 11... Rod, 21,
41... Foot pedal, 22, 44... Manual lever, 23, 31, 46... Link member, 23A,
46A...Boss part, 23C, 31A, 46C...
Link portion, 23D, 31B...first arm portion, 23
E, 31C...Second arm, 46D...Arm, 3
2...Rotation axis, 42...Pin.

Claims (1)

[Scope of utility model registration request] Consists of a manual lever and foot pedal for operation, and a link member rotatably provided on the floor plate via a connecting pin to transmit the operating force from the manual lever and foot pedal to the control valve mechanism. An operating device characterized in that the manual lever and the foot pedal are each removably attached to the link member.