JPH0656221B2 - Control valve and operating lever interlocking relationship switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a pair of control valves that are individually operated by swinging in two directions intersecting with each other by operating a control lever in each direction, and the above-mentioned operation. The present invention relates to a device that switches the interlocking relationship with a lever.

[Conventional technology]

As the interlocking relationship switching device, there has conventionally been the means shown in FIG. That is, of the cruciform operation of the operation lever (3), the first relay transmission shaft (21) interlocked with the forward and backward swing, and
The second relay transmission shaft (2
2) are provided respectively, and the relay transmission shaft (21) or (2
2) and a pair of mounting portions (24a), (2) for switching and connecting the first interlocking rod (23) for interlocking the first control valve (4).
4b) and a pair of mounting portions (26a), (26b) for switching and connecting the relay transmission shaft (21) or (22) and the second interlocking rod (25) for interlocking the second control valve (5). ) Each first
The relay transmission shaft (21) and the second relay transmission (22) are separately provided, and the first interlocking rod (23) is connected to the second relay transmission shaft (22) and the second interlocking rod (25) is connected to the second interlocking rod (25). The first control valve (4) is operated by the lateral swing operation of the operation lever (3) and is connected to the relay transmission shaft (21), and the second control is performed by the forward and backward swing operation of the operation lever (3). The control lever (3) and both control valves (4), so that the valve (5) can be operated.
The interlocking state of connecting (5) is obtained, or the first interlocking rod (23) is connected to the first relay transmission shaft (21) and the second
The interlocking rod (25) is interlocked with the second relay transmission shaft (22), and the second control valve is operated by laterally swinging the operating lever (3).
Operate the operating lever (3) and both control valves (4), (5) so that (5) is operated and the first control valve (4) is operated by swinging the operating lever (3) back and forth. The interlocking state of connecting is obtained.

[Problems to be Solved by the Invention]

In the case of the conventional means, the bending of the interlocking rods (23) and (25) is hard to occur, and the control valves (4) and (5)
Interlock rod (2
Since it is necessary to keep the inclination angles of 3) and (25) as small as possible, the relay transmission shafts (21) and (22) and the control valve (4),
Since it is necessary to increase the interval of (5), the space required for disposing the operating device is large.

An object of the present invention is to provide an interlocking relationship switching device that can minimize the space required for disposing the operating device.

[Means for Solving the Problems] The technical means of the present invention taken to achieve the above object are
A first control valve and a second control valve are arranged side by side, and an operating lever for both control valves and a linkage mechanism for transmitting a cross direction operation of the operating lever to each of the control valves in each direction are provided. In the interlocking relationship switching device for the control valve and the operating lever, the linkage mechanism is configured as described in [a] to [f] below.

[A] The linkage mechanism includes a lever holder integrally formed with the operation lever, a fixed-side support body for supporting the lever holder with respect to a machine-side fixed portion, and a machine-side fixed body. The mounting portion formed on the fixed portion, the lever holding body and the fixed side support body are separately provided for the first control valve and the second control valve.
It is composed of a first valve connecting portion and a second valve connecting portion which are linked to the control valve.

[B] The mounting portion for mounting the fixed-side support body to the fixed portion on the body side is a first mounting portion and a second mounting portion that are provided at a predetermined distance in a direction along the juxtaposed direction of both control valves. And a pivotal shaft fixed to the fixed-side support body is selectively attached to and detached from each mounting portion.

[C] The fixed side support body and the lever holding body are arranged around a third axis center orthogonal to a first axis center of a pivot shaft serving as a swing center of the fixed side support body and a rod center of the operation lever. A connection state in which the fixed side support body is connected to the lever holder so as to be rotatable relative to each other, and a first connection posture in which the first axis intersects with a rod core of the operation lever on one plane; The first shaft core is configured to be switchable between a rod core of the operation lever and a second connection posture in which the first shaft core is located apart from the mounting portion of the fixing portion by the distance between the mounting portions.

[D] The fixed-side support and the first valve connecting portion are arranged such that the first shaft core is located at a position apart from the first shaft core on a plane including the first shaft core and the third shaft core. Is connected in parallel to the first axis and is rotatable relative to a second axis that is orthogonal to the third axis.

[E] The lever holding member and the second valve connecting portion are parallel to the third axis at a position apart from the third axis on a plane including the first axis and the third axis. And is relatively rotatably connected about a fourth axis that is orthogonal to the first axis.

[F] The first valve connecting portion and the second valve connecting portion are respectively
The first control valve and the second control valve are both replaceable.

[Action]

The effect of taking the above technical means is as follows.

That is, when the fixed side support is replaced with respect to each mounting part, the connection is switched with respect to the control valve, the mounting direction of the lever holder is changed with respect to the fixed side support, and the valve interlocking part is switched with respect to the control valve, the lever is changed. Since the fixed side support body is connected to the holding body in the first connection posture or the second connection posture, even if the distance between the operation lever and the control valve is smaller than the conventional one, the operation lever and the control valve are connected. Despite this switching, the interlocking switching can be performed while preventing problems such as poor transmission of operating force and twisting of the control valve.

〔The invention's effect〕

Since the distance between the operating lever and the control valve can be made smaller than before, the operating device can be installed in a relatively narrow space, and the device can be made compact.

〔Example〕

In the backhoe with a dozer shown in FIG. 4, the boom (1a) and the bucket (1b) of the backhoe device (1) are swung on the swivel base (2) in the cross direction so that the boom (1a) and the bucket (1b) can be swung both forward and backward and laterally. The operation mode in which the boom (1a) is operated by operating the one operation lever (3) swingably attached to the The operation lever so that the operation mode of operating the bucket (1b) by the lateral swing operation of 3) can be selected.
A linking mechanism is provided for linking (3) with control valves (4) and (5) described later.

That is, as shown in Fig. 1, the bucket control valve (4) and the boom control valve (5) are attached to the swivel base (2).
And a lever support member as a fuselage side fixing part at a position located in front of the control valves (4) and (5) of the swivel base (2).
(6) is set up.

As shown in FIG. 3, a fixed side support body (7) made of a bent sheet metal for interlocking the operation lever (3) with the control valve (4) or (5) is attached to the lever support member (6). ), Which is arranged side by side in the lateral direction of the swivel base, is inserted into one of the first mounting portion (6a) and the second mounting portion (6b) that can be rotated and removed freely, and is removed by a retaining ring (not shown). To stop, and
By the pivot shaft (9) formed so as to have the first axis (P1) in the front-rear direction of the swivel base, the first mounting portion (6a) of the lever support member (6)
And the second attachment portion (6b), and is configured to rotate about the first shaft core (P1) regardless of which one is attached.

The first valve connecting portion (10) for connecting to the control valve (4) or (5) of the fixed side support (7) is provided with the first shaft core.
Fixed side support pin part having a second axis (P2) parallel to (P1)
One end is rotatably attached to (7a), and the other end is the first
Swing and separate to the sliding spool (4a) of the bucket control valve (4) and the swing spool (5a) of the boom control valve (5) via the detachable connecting pin (11) parallel to the axis (P1). The second shaft core (P2) with respect to the fixed side support body (7) is formed by a connecting tool configured to be freely connected.
So that it rotates around the
It is configured so that it can be switched and connected to (4) and (5).

Lever holder for fixed side support (7) of operating lever (3)
(12) is formed in a downward U shape so as to cover the fixed side support (7) from above, and the operation lever (3) is welded to the horizontal side portion, and further, to the pair of vertical side portions. And a detachable mounting pin (13) having a third shaft core (P3) in a direction orthogonal to the first shaft core (P1) so as to be pivotally and separably mounted on the fixed side support body (7). The fixed side is formed by a bent sheet metal configured to be attached to the fixed side support body (7) in a rotatable and separable manner by a detachable mounting pin (13) having a third shaft core (P3) The operating lever (3) rotates integrally with the support (7) around the first axis (P1) and relatively rotates around the third axis (P3), and Configure so that the lever can be mounted while the mounting direction can be changed around the axis of (3).

The second valve connecting portion (14) for connecting to the control valve (4) or (5) of the operating lever (3) is connected to the third shaft core (P
Detachable connector (15) having a fourth axis (P4) parallel to 3),
One end side is removably connected to the lever holding body (12) through a ball joint (16), and the other end side is connected through a removable connecting pin (17) parallel to the first shaft core (P1). The sliding spool (4a) or
(5a) is formed by a connecting tool configured to be swingably and separably connected, so that when the operation lever (13) is attached to the fixed side support body (7), the first shaft core (P1) and the first shaft core (P1) 4-axis core
(P4) It is configured to rotate around each of them with respect to the operation lever (3).

Then, as shown in FIG.
The valve connecting part (10) is attached to the first mounting part (6a) so that the valve connecting part (10) is located toward the bucket control valve (4), and is connected to the bucket control valve (4), and the operating lever (3) is connected to the first position. 2 The valve connection part (14) is located toward the boom control valve (5).
Attach it to (7) and connect it to the boom control valve (5) to operate the control lever (3), control valve (4) and
The first interlocking state of (5) is obtained.

That is, when the operation lever (3) is rocked around the first axis (P1), the rocking axis of the operation lever (3) and the operation lever (3) and the second valve connecting portion ( The boom control valve (5) is not operated because all of the connecting shaft cores of 4) match with the first shaft core (P1), and the first shaft that is the swing shaft core of the operation lever (3). Since the core (P1) and the second shaft core (P2) which is the connecting shaft core of the first valve connecting part (10) are separated from each other, the first valve connecting part (10) is moved up and down to operate the bucket control valve (4 ) Is operated, and the operation lever (3) moves to the third axis
When the rocking operation is performed around (P3), the operation lever (3) rocks with respect to the fixed side support body (7), and the bucket control valve (4) is not operated, and the operation lever (3) Since the third shaft core (P3), which is the rocking shaft core, and the fourth shaft core (P4), which is the connecting shaft core of the second valve connecting part (1), are separated from each other, the second valve connecting part (14) The operating lever (3) is connected to the control valves (4) and (5) so that the boom control valve (5) is operated by moving up and down.

Alternatively, as shown in FIG. 2, the fixed side support body (7) is attached to the second attachment portion (6b) so that the first valve connecting portion (10) is located toward the boom control valve (5). Together with the boom control valve (5) and the operation lever (3) with the second valve connecting part (14) located toward the bucket control valve (4).
Installed on (7) and connected to the bucket control valve (4), the operating lever (3) and control valve (4) and
Obtain the second linked state of (5).

That is, when the operation lever (3) is oscillated around the first axis (P1), either the oscillating axis of the operation lever (3) or the connecting axis of the second valve continuous portion (14) is detected. The bucket control valve (4) is not operated due to the fact that the rods match with the first axis (P1), and the first axis that is the swing axis of the operation lever (3)
A second shaft core which is a connecting shaft core of (P1) and the first valve connecting portion (10)
When (P2) is separated, the first valve connecting part (10) is moved up and down to operate the boom control valve (5), and the operation lever (3) is moved around the third shaft core (P3). When the rocking operation is performed, the operation lever (3) rocks with respect to the fixed-side support body (7), whereby the boom control valve (5)
Is operated, the third axis that is the swing axis of the operation lever (3)
(P3) and the fourth shaft core which is the rocking shaft core of the second valve connecting part (14)
The control lever (3), the control valve (4), and the control valve (4) are operated so that the bucket control valve (4) is operated by moving up and down the second valve connecting part (14) by separating (P4).
(5) is connected.

[Another embodiment]

For the operation of the arm (1b) of the backhoe device (1) and the swivel base (2), the same means as in the case of the boom and bucket are adopted. Further, the means according to the present invention can be applied to other than the backhoe such as a shovel loader. Therefore, the bucket control valve (4) and the boom control valve (5) are referred to as the first control valve (4) and the second control valve (5), respectively, and the swivel base is referred to as the airframe.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of an interlocking relationship switching device for a control valve and an operating lever according to the present invention. Fig. 1 is a diagram showing a first interlocking state, and Fig. 2 is a diagram showing an interlocking state. 3 is a perspective view of the interlocking member, and FIG. 4 is a side view of the entire backhoe. FIG. 5 is an explanatory view of conventional means. (3) …… Operating lever, (4) …… First control valve,
(5) …… Second control valve, (6) …… Lever support member, (6a) …… First mounting part, (6b) …… Second mounting part, (7)…
... Fixed side support, (9) ... Pivoting part, (10) ... First valve connecting part, (12) ... Mounting part, (14) ... Second valve connecting part,
(P1) …… First axis core, (P2) …… Second axis core, (P3) …… Third axis core, (P4) …… Fourth axis core.

Claims (1)

[Claims] 1. A first control valve (4) and a second control valve (5) are arranged in parallel, and an operating lever (3) for both control valves (4), (5) and the operating lever (3). Perform the cross direction operation of 3) above both control valves (4),
(5) An interlocking relation switching device for a control valve and an operating lever, which is provided with a linking mechanism for transmitting in each direction to (5) and has the linking mechanism configured as described in [a] to [f] below. [A] The linkage mechanism supports the lever holding body (12) with respect to the lever holding body (12) integrally connected to the operation lever (3) and the machine-side fixing portion (6). Fixed side support for
(7) and the mounting part (6
a), (6b), the lever holding body (12) and the fixed side support body (7)
First valve connecting part (10) for separately connecting the first control valve (4) and the second control valve (5)
And a second valve connecting part (14). [B] Mounting parts (6a) and (6b) for mounting the fixed side support (7) to the fixed part (6) on the fuselage side are arranged in the parallel direction of the control valves (4) and (5). The fixed side support body is composed of a first mounting portion (6a) and a second mounting portion (6b) which are provided at a predetermined distance in the direction along the
A pivot shaft (9) fixed to (7) is selectively attached and detached. [C] The fixed side support body (7) and the lever holding body (12) are the first axis of the pivot shaft (9) which is the swing center of the fixed side support body (7).
Third axis (P3) orthogonal to (P1) and rod of operating lever (3)
The lever holder (1
The connection state of the fixed side support body (7) with respect to 2) is the first connection posture in which the first shaft core (P1) intersects with the rod core of the operation lever (3) in one plane; The axis (P1) is the operating lever
It is configured to be switchable from the rod core of (3) to the second connection posture in which the two mounting portions (6a) and (6b) of the fixing portion (6) are separated from each other by the distance. [D] the fixed side support (7) and the first valve connecting part (10)
On a plane including the first shaft core (P1) and the third shaft core (P3), the first shaft core at a position apart from the first shaft core (P1).
A second axis parallel to (P1) and orthogonal to the third axis (P3)
It is connected so that it can rotate relative to (P2). [E] The lever holding body (12) and the second valve connecting portion (14) are on the plane including the first shaft core (P1) and the third shaft core (P3), and the third shaft core is The third at a position away from (P3)
They are connected so as to be rotatable relative to each other around a fourth axis (P4) which is parallel to the axis (P3) and orthogonal to the first axis (P1). [F] The first valve connecting part (10) and the second valve connecting part (14) can be freely attached to either the first control valve (4) or the second control valve (5). It is configured.