JPH0913426A - Working machine having turning driving part - Google Patents

Abstract

PURPOSE: To improve the operability and prevent wrong operation by forming an operating pedal provided on the floor surface by a main pedal and an expandable sub-pedal, and enabling rotating drive and suitable work with one pedal. CONSTITUTION: An operating pedal 10 provided on the floor surface of a driver's seat is formed by connecting a sub-pedal 24 to a main pedal 23 through a hinge shaft 25 in such a manner as to freely turn on the hinge. In the case where the sub-pedal 24 is stored (folded and superposed) in the main pedal 23, the main pedal 23 independently turns the turning driving part. In the case of operating the suitable operating part provided or connected to the turning driving part, the sub-pedal 24 is expanded and operated, so that turning and the other operation can be performed with one operating pedal 10. Further, if the sub- pedal 24 is expanded, the main pedal 23 is locked so that the main operation (operation of the turning driving part) can not be conducted. Thus, some allowance is given to the foot space of the floor part, and the pedal can be easily operated to prevent wrong operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a backhoe having a turning drive section.

[0002]

As is well known, backhoes (excavation work machines)
Is provided with a work machine main body equipped with a boarding device above a crawler type traveling device, and a boom having a shovel at its tip is provided with respect to the work machine main body. Generally, at least one of the turning of the working machine main body with respect to the traveling device, the turning of the boom with respect to the working machine main body, and the middle-folded turning of the boom joints and the like can be performed. These turning drive parts can be operated by stepping on a turning pedal provided on the front floor of the riding apparatus in the working machine body.

By the way, some of the booms described above are provided with a service port for extracting hydraulic pressure near the tip thereof. This service port is for supplying drive hydraulic pressure to the accessory machines when the boom is equipped with breakers for pile driving, rock drilling, etc., rammers for soil consolidation, etc. The hydraulic hose connection port of.

The supply / stop of hydraulic pressure to the service port (that is, the operation of the attached machine) is performed by a work pedal (generally called an SP pedal) provided on the front floor of the riding apparatus in the working machine body. Can be operated by stepping on.

[0005]

On the floor of the front side of the boarding device of the working machine body, there are provided pedals related to traveling which are indispensable and important for controlling the traveling device and the like. Therefore, the turning pedal and the work pedal are to be arranged at a position apart from the pedals related to traveling (for example, if the pedal related to traveling is the left foot operating position, the turning pedal and the work pedal are located at the right foot operating position). It was Moreover, these two pedals are arranged side by side so that they are adjacent to each other.

For this reason, the foot space (especially for the right foot) on the front floor of the boarding device is small, which is inconvenient for getting on and off, and it is difficult to operate the turning pedal and the work pedal. It had the drawback that it would cause erroneous operation. In particular, erroneous operation of the swing pedal and the work pedal is a serious problem, and the boom may swing including the attached machine during work by the attached machine such as a breaker or rammer. Therefore, this may result in damage to the attached machine and boom, damage to surrounding structures, and the like.

The present invention has been made in view of the above circumstances, and enables a foot space on the front floor of a boarding device to have a space for facilitating the getting on / off operation and pedal operation. It is an object of the present invention to provide a working machine having a turning drive unit capable of facilitating the above-mentioned operation and preventing an erroneous operation in pedal operation.

[0008]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, according to the present invention, in a working machine having a turning drive unit, the turning drive unit and an appropriate working unit provided or connected to the turning drive unit are configured to be operable by one operation pedal. It has a feature.

The operation pedal has a main pedal and a sub-pedal that can be expanded or retracted with respect to the main pedal, and can be operated when the turning drive section is operated and when the working section is appropriately operated. The operation directions are made different, and the tread surface suitable for the operation direction with respect to the turning drive portion can be configured by storing the sub-pedal, and the tread surface suitable for the operation direction for the working portion can be configured by expanding the sub-pedal. Is preferred.

It is preferable that the main operation of the main pedal is locked so that it cannot be operated when the sub-pedal is expanded.

[0011]

[Operation] The operation of the turning drive unit (which was conventionally performed by the turning pedal) and the operation of an appropriate working unit which is an accessory machine such as a breaker or a rammer (which was conventionally performed by the work pedal) Since it can be operated with one operation pedal, the foot space of the front side floor portion of the boarding device can be provided with more space.

By the way, when using only one operation pedal, it is necessary to properly use the operation of the turning drive section and the operation of the working section by changing the operation direction or operation amount. When the operation pedals are to be operated in different directions, a structure having a main pedal and a sub-pedal that can be expanded or stored with respect to the main pedal can be adopted.

That is, with this structure, when the sub-pedal is stored in the main pedal, the area of the sub-pedal does not add to the area of the main pedal. It becomes possible to configure the tread. Further, when the sub-pedal is expanded with respect to the main pedal, the tread surface suitable for the operation direction with respect to the working portion can be appropriately configured as the area of the sub-pedal is extended and expanded with respect to the area of the main pedal. This makes it easy to use each operation properly.

When the sub-pedal is deployed, the main pedal and the sub-pedal can be operated (operation on the working portion as appropriate), but the main operation by the main pedal (operation on the turning drive portion) cannot be performed, that is, locked. With such a configuration, there is an advantage that erroneous operation can be reliably prevented.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 2 and 3 show a work machine 1 according to the present invention applied as a backhoe.
2 is a crawler type traveling device, 3 is a dozer device, 4
Is a working machine main body provided so as to be rotatable on the traveling device 2. Further, in the working machine main body 4, 5 is a counterweight portion, 6 is a boarding device, and various operation levers 8 and operation pedals 9 and 1 are provided so as to surround the boarding device 6.
0, instruments (only the location thereof is indicated by reference numeral 11) and the like are arranged.

The working machine body 4 is capable of turning (swinging to the left and right) about a vertical axis support portion 13 provided obliquely in front of the boarding device 6 and swinging up and down about a horizontal axis support portion 14. A movable boom 15 is provided. This boom 1
In FIG. 5, a swing arm 15b near the tip of the boom body 15a bent in a dogleg shape is swingable in the front-rear direction. A shovel 16 is provided at the tip of the swing arm 15b. Is provided.

In this work machine 1, other operating parts including the swinging and vertical swinging of the boom 15 are hydraulically driven. Near the tip of the boom 15 (swing arm 1
5b) (on the side corresponding to 5b), the service port 18
Is provided. The service port 18 is provided with a pressure resistant hose 19 from a hydraulic pressure generator (not shown) in the working machine body 4.
It is composed of a coupling 20 connected via. And, as mentioned above, breaker, rammer,
In the case where the boom 15 is equipped with an appropriate working unit that is various other accessory machines (none of which is shown), it serves as a hydraulic hose connection unit for supplying driving hydraulic pressure to the working unit. is there.

By the way, as shown in FIG.
Of the operation pedals 9 and 10 provided on the front floor of the
The operation pedal 9 on the left side of the operation lever 8 in the center (position between the knees of the driver M) is indispensable and important for controlling the traveling device 2 and the like. Further, the operation pedal 10 on the right side is operable to supply / stop the hydraulic pressure to the service port 18 (that is, to appropriately operate the working unit) and to rotate the boom 15. ing.

That is, the operation pedal 10 on the right side is
As shown in FIGS. 4 to 6, it has a main pedal 23 and a sub pedal 24. The main pedal 23 has a planar shape that is long in the left-right direction, and the sub pedal 24 has a planar shape that is long in the front-rear direction. As shown in FIG. 1, the main pedal 23 and the sub-pedal 24 are connected to each other via a hinge shaft 25 so that the main pedal 23 and the sub-pedal 24 can swing freely.

The main pedal 23 has a hinge shaft 2
A hanging lever 27 that protrudes downward from a shaft insertion portion 26 for inserting 5 is provided. The hanging lever 27 is held so as to be swingable right and left around a swing shaft 29 with respect to a pedal support 28 provided on the front side (left side in FIG. 5). Furthermore, the pedal support 28 is held so as to be swingable back and forth (see FIG. 5) about the horizontal shaft 30 with respect to the work machine body 4. The pedal support 28 is integrally provided with a socket portion 31 for externally fitting and holding the swing shaft 29. Therefore, when the pedal support 28 swings back and forth around the horizontal axis 30,
The main pedal 23 also swings back and forth together via the socket portion 31, the swing shaft 29, and the hanging lever 27.

In the socket portion 31 of the pedal support 28,
A stopper piece 32 is provided so as to form left and right upright surfaces across the upper surface. In contrast,
The sub-pedal 24 is provided with a pair of engaging pieces 34 that respectively protrude downward from left and right shaft insertion portions 33 through which the hinge shaft 25 is inserted. These engaging pieces 34
When the sub-pedal 24 is deployed in front of the main pedal 23 (on the right side in FIG. 5), the sub-pedal 24 can be brought into contact with the lower surface of the main pedal 23 to maintain the forward-projected state of the sub-pedal 24 (that is, prevent it from falling too much). ).

At this time, the left and right engagement pieces 34 are in a state of sandwiching both sides of the stopper pieces 32 provided on the pedal support body 28, and do not interfere with the butterfly motion of the sub pedal 24. . A transmission shaft 37 is connected to a lower end portion of the hanging lever 27 of the main pedal 23 via a universal joint 36. The transmission shaft 37 extends to the right as is clear from FIG. 4 and the like, and the output end side 37 a thereof causes the swing drive unit (the vertical axis support unit 13 shown in FIG. 3) provided at the base of the boom 15. It is designed to transmit the operating force in the left-right direction to (installed around).

The horizontal shaft 30 connected to the above-mentioned pedal support 28 also extends rightward, and its output end side 30a rotationally operates a hydraulic control valve (not shown) for the service port 18. It is designed to transmit power. That is, in the operation pedal 10, when the sub-pedal 24 is expanded forward with respect to the main pedal 23, the upper surface area of the main pedal 23 is extended and expanded by the upper surface area of the sub-pedal 24 as shown in FIG. It becomes a thing. Therefore, the operation pedal 10 has a long tread surface in the front-rear direction.

Therefore, if a foot is placed on the operation pedal 10, the structure naturally makes it easy to swing back and forth around the horizontal shaft 30. Of course, since the horizontal shaft 30 is rotated by such a back-and-forth swing, the hydraulic control valve (not shown) for the service port 18 can be opened or closed as described above, and as a result, the service port 18 can be closed. The connected working unit (not shown) can be operated appropriately.

In this case, since the engaging pieces 34 of the sub-pedal 24 sandwich both sides of the stopper piece 32 of the pedal support 28, an operating force for swinging the main pedal 23 in the left-right direction is applied. Even in this case, the engagement piece 34 abuts the stopper piece 32 to lock the left-right swing in an impossible state. That is, as long as the sub-pedal 24 is left in the unfolded state, the main pedal 23 will not rotate.
It does not swing left and right around 9.

On the other hand, in the operation pedal 10, when the sub-pedal 24 is folded rearward with respect to the main pedal 23 and put in the retracted state, the operation pedal 10 has only the upper surface area of the main pedal 23 alone as shown in FIG. , A horizontally long tread will be configured. Therefore, if a foot is placed on the operation pedal 10, it is inevitably easy to swing left and right around the swing shaft 29 due to its structure. Of course, since the transmission shaft 37 is moved left and right by such a left-right swing, the turning drive portion (not shown) of the boom 15 can be operated as described above.

In order to make it easier to swing the operation pedal 10 to the left and right, and especially to prevent the pedal from being stepped off, in this embodiment, the left and right ends and the rear end of the main pedal 23 are prevented from slipping. Fold-up pieces 39 and 40 are provided.
Further, as shown in FIG. 8, when the operation pedal 10 as a whole is not operated, in order to prevent the erroneous operation, in the present embodiment, the sub pedal 24 with respect to the main pedal 23.
The cover body 41 is provided so as to be capable of swinging back and forth so as to cover all of them in the retracted state folded backward. The cover body 41 includes a folding-up piece 4 at the rear end of the main pedal 23.
A cutout portion 41a (see FIG. 4) for preventing interference with 0 is provided.

In the cover body 41, 42 is a hinge piece fixed to the front floor of the boarding device 6 in the working machine body 4, and 43 is a swing pivot. By the way, the present invention is not limited to the above embodiment. For example,
The shapes and the like of the main pedal 23 and the sub pedal 24 are not limited. Also, these pedals 23, 24
The structure for enabling the unfolding and storage can be a butterfly swingable structure as described above, and can be replaced with a horizontal swing structure, a horizontal slide structure, or the like.

In the working machine 1 according to the present invention, not only the turning portion of the boom 15 with respect to the working machine body 4 but also the working machine body 4 with respect to the traveling device 2 is a target of the turning drive section.
The present invention is also applicable to the swiveling part, the center-folded swiveling part of the joint of the boom 15, and the like. Further, although the case where the working unit is an accessory machine such as a breaker or a rammer is illustrated as an example, the working unit is not limited thereto.

The work machine 1 is not limited to a backhoe, but can be applied to other machines used in various fields such as civil engineering, construction, and agriculture.

[0031]

The present invention has the above-mentioned structure, and since the operation of the turning drive unit and the operation of the working unit can be performed by one operation pedal, the boarding device is only that much. It is possible to give a space to the foot space on the front side floor part in. Therefore, there are advantages that the movement such as getting on and off can be easily performed, the pedal operation is also easy, and the erroneous operation can be prevented as much as possible.

Further, since the operation of the turning drive section and the operation of the working section are properly used by changing the operation direction of the operation pedal, further erroneous operation can be prevented.
Further, in this operation pedal, if the main pedal and the sub-pedal can be expanded or retracted, the operation of the turning drive section can be favorably performed by the shape of the main pedal when the sub-pedal is retracted, and when the sub-pedal is expanded, both pedals can be operated. Since the operation of the working unit can be appropriately performed by the combined shape, it is possible to further clearly and easily use each operation.

If the main operation by the main pedal (operation with respect to the turning drive portion) is locked when the sub-pedal is deployed, there is an advantage that erroneous operation can be surely prevented. Therefore, it is possible to prevent the turning drive unit from turning during the work by the working unit as appropriate, and it is possible to appropriately prevent the working unit and the turning drive unit as well as surrounding structures from being damaged.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an operation pedal according to the present invention.

FIG. 2 is a side view showing a working machine according to the present invention.

FIG. 3 is a partially omitted plan view of the work machine according to the present invention.

FIG. 4 is an enlarged plan view showing an operation pedal (main part of FIG. 3) according to the present invention.

5 is an enlarged view taken along the line AA of FIG.

6 is an enlarged arrow view taken along the line BB of FIG.

FIG. 7 is an operation explanatory diagram corresponding to FIG. 5;

8 is a diagram showing a non-operational state corresponding to FIG.

[Explanation of reference numerals] 1 work machine 2 traveling device 4 work machine body 6 riding device 10 operation pedal 15 boom 18 service port 23 main pedal 24 sub-pedal

Claims (3)

[Claims] 1. A working machine having a swing drive section,
A working machine having a turning drive unit, wherein the turning drive unit and an appropriate working unit provided or connected to the turning drive unit are configured to be operable by a single operation pedal (10). 2. The operation pedal (10) has a main pedal (23) and a sub-pedal (24) which is provided so as to be deployable or retractable with respect to the main pedal (23), and also has a turning function. The operation direction is different when the drive unit is operated and when the working unit is appropriately operated.
The tread surface suitable for the operation direction with respect to the swivel drive section can be formed by the storage of 4), and the tread surface suitable for the operation direction with respect to the working section can be appropriately formed by expanding the sub-pedal (24). A working machine having the turning drive unit according to Item 1. 3. The swing drive unit according to claim 2, wherein when the sub-pedal (24) is deployed, the main operation of the main pedal (23) is locked so that it cannot be operated. Working machine with.