JPH0324683Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention connects a support shaft that externally supports a cylindrical shaft rotatably to a pair of shaft mounting members fixed to a support base at both ends, and connects the cylindrical shaft to a valve and an operating tool. The present invention relates to a valve operating device for a working vehicle, in which the cylinder shaft thereof is configured as a relay shaft in a valve operating mechanism.

Conventionally, in the above work vehicle, when attaching a relay support shaft, the support shaft 1 is attached to a pair of shaft attachment members 33' fixed to a support base 32', as shown in FIG.
6' and 17' were horizontally supported with the valves 6' and 17' penetrating in the axial direction, but after assembly, the valve V
When removing the cylindrical shafts 19' and 26' as relay shafts for inspection and repair of the operating mechanism of the
In places where the space in the axial direction of the support shafts 16' and 17' is limited, supporting shafts 16' and 17' cannot be removed in the axial direction from the shaft mounting member 33' over their entire length, so it is unavoidable to support them. It is necessary to remove the cylinder shafts 19' and 26' after removing the entire stand 32', and this increases the number of parts to be removed, resulting in a problem that the efficiency of inspection and repair work is greatly reduced.

In view of the above-mentioned circumstances, the purpose of the present invention is to rationally improve the mounting structure of the support shaft so that the cylindrical shaft can be removed extremely easily for inspection and repair work.

The characteristic configuration of the valve operating device of the present invention is that in the working vehicle described at the beginning, the support shaft and the cylindrical shaft can be inserted into and removed from between the two shaft mounting members by parallel movement in the radial direction of the shafts. , the lengths of the support shaft and the cylindrical shaft are formed to be approximately equal to the distance between the inner surface for shaft mounting of one of the shaft mounting members and the inner surface for shaft mounting of the other shaft mounting member, and the shaft is penetrated through each of the shaft mounting members. bolts are individually screwed into bolt holes formed on both end faces of the support shaft, and holes are formed in the support shaft and the cylindrical shaft for inserting and removing a tool that prevents the bolts from rotating together with the bolts. The functions and effects are as follows.

In other words, with the above configuration, when removing the cylindrical shaft, it is possible to take out the shaft by simply removing the bolt from the support shaft and moving the support shaft and the cylindrical shaft in the radial direction. With this structure, the disassembly and reassembly of the cylinder shaft can be greatly facilitated compared to removing the cylinder shaft after removing the entire support base.

Moreover, by forming a hole in the support shaft and the cylinder shaft for inserting the co-rotation prevention tool, the bolt can be easily screwed together without co-rotating with the shaft. As a result, it has become possible to provide a valve operating device for a work vehicle that is extremely easy to inspect and repair.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG.
The swivel base 2 is installed so that it can be driven and rotated freely.
An excavation work device 12 is provided with a boarding operation section 4 and a driving section 5, and a boom 6, an arm 7, and a bucket 8 are successively connected by hydraulic cylinders 9, 10, and 11 so as to be freely driven and swingable.
is attached to the front end of the swivel base 2 via a swing bracket 14 which can be operated to swing left and right by a hydraulic cylinder 13, thereby forming an excavating work vehicle.

A second
As shown in the drawings and FIG. 3, separate hydraulic motors for traveling for the left and right traveling device 1, hydraulic cylinders for swinging 3, hydraulic cylinders 9, 10, 11 for each of the boom 6, arm 7, bucket 8, and The swing bracket hydraulic cylinder 13 and the operation valves V ₁ to V ₇ for each of the above hydraulic actuators are connected to the bottom wall 2 of the swivel base 2 below the operation step 15.
a, and two horizontal support shafts 16, upper and lower, are installed in front of the valves V ₁ to V ₇ side by side on the left and right.
17 are provided in a parallel position.

A pair of left and right running levers 18a, 18
b are separately connected to the first and second cylindrical shafts 19a and 19b which are loosely fitted and supported side by side on the upper support shaft 16, and are connected to the first and second cylindrical shafts 19a and 19b and each hydraulic motor for travel. Operation valve V ₁ , V ₂
The first and second cylinder shafts 19a, 19b are connected to the respective levers 18a, 18b and the valves V ₁ , V ₂ through push/pull rods 21a, 21b. With the relay rotation shaft used to correct positional deviations in the left and right directions, the valves V ₁ ,
It is configured to operate the V ₂ to control the vehicle.

In addition, for excavation work, a pair of levers 23a, 23b are provided which can be freely swung back and forth and swung left and right.
Component members 25a and 25b that swing up and down around the longitudinal axis Q ₁ and Q ₂ by the left and right swing operation of b, and the third and fourth cylinder shafts 26a that are loosely fitted and supported side by side on the lower support shaft 17. , 26b, and the constituent members 25a, 2
The cylinder shafts 26a, 26b are rotated by vertical swinging of the cylinder 5b.
ball joint 27 so that it can be rotated.
A, 27b are interlocked and connected via vertical rods 28a, 28b, and furthermore, the third cylinder shaft 26a is directly connected to the operating part of the operating valve _V3 for the bucket cylinder 11 via a push/pull rod 29a. In addition, the fourth cylindrical shaft 26b is selectively connected to the operating part of the operating valve _V4 for the swing bracket cylinder 13 and the operating part of the operating valve _V5 for the swing motor 3 by a push/pull rod 29b.
They are interlocked and connected via.

Then, by swinging the levers 23a, 23b back and forth among the lever connecting support shafts 24a, 24b, the horizontal axes P ₁ , P ₂ of these support shafts 24a, 24b are aligned.
_The push/pull rods _31a ,
31b, the third and fourth cylinder shafts 26a and 26b are connected to the first and second cylinder shafts.
The swivel base 2 or the swing bracket 14 and the excavation work 12 are configured to be operated by a cross-selective swing operation of each lever 23a, 23b in a state where the shaft is used as a relay rotation shaft similar to the cylinder shafts 19a, 19b. be.

To configure the mounting structure of each cylindrical shaft 19a, 19b, 26a, 26b and the support shafts 16, 17 thereto, a pair of left and right bracket-shaped shafts are mounted on a support base 32 bolted to the bottom wall 2a of the swivel base 2. The members 33 are fixed in a parallel position, and each cylinder shaft 1
The support shafts 16 and 17, into which the shafts 9a, 19b, 26a and 26b are loosely fitted, are arranged between the shaft mounting members 33 in predetermined vertically parallel positions. And cylinder shaft 1
Total length of 9a and 19b, cylinder shafts 26a and 26
The total length of b and the lengths of the support shafts 16 and 17 are formed to be approximately equal to the distance between the shaft mounting inner surface of one shaft mounting member 33 and the shaft mounting inner surface of the other shaft mounting member 33, and Bolt holes 16a are provided on both end surfaces of the shafts 16 and 17 concentrically with their axes R ₁ and R ₂ .
17a and those bolt holes 16
a, 17a to the shaft mounting member 3.
Bolt hole 1 while passing through it from the outside of 3.
6a, 17a, and each support shaft 16, 1
7 is horizontally supported on a shaft mounting member 33.

In other words, during inspection, repair work, etc., the cylinder shaft 19
a, 19b, 26a, 26b, by simply unscrewing the bolt 34, the supporting shaft can be removed due to the above-mentioned dimensional relationship between the supporting shaft length, the cylindrical shaft length, and the inner distance of the shaft mounting members 33, 33. 16, 17, and cylinder shaft 19
a, 19b, 26a, 26b can be moved in parallel in the radial direction of their shafts and taken out upwardly from between the shaft mounting members, even in places where left and right space is restricted by the component frame 2b of the swivel base 2, etc.
The cylinder shafts 19a, 19b, 26a, and 26b are configured to be easily removed.

Further, in each of the upper and lower support shafts 16 and 17, a hole 35 is formed in the cylindrical shafts 19b and 26b and the support shafts 16 and 17 to extend through them.
By inserting the rod-shaped tool 36 into these holes 35 during the screwing operation, the support shafts 16 and 17 are prevented from rotating together as the bolt 34 rotates, and the screwing operation of the bolt 34 can be easily performed. It is configured so that

Note that the specific number of left and right divisions of the cylinder shafts 19, 26 as relay rotation shafts can be changed as appropriate, and the cylinder shafts 19, 26, operating tools 18, 23, and
The specific interlocking structure with the valve V can also be improved in various ways.

The present invention is directed to valve operating devices for various types of work vehicles such as construction and agricultural vehicles.

[Brief explanation of the drawing]

The drawings show an embodiment of the valve operating device for a working vehicle according to the present invention, in which Figure 1 is an overall side view of the excavating vehicle, Figure 2 is an enlarged perspective view of the valve operating structure, and Figure 3 is an enlarged perspective view of the valve operating structure.
The figure is a sectional view showing a relay shaft mounting structure, and FIG. 4 is a sectional view showing a conventional structure. 16, 17... Support shaft, 16a, 17a... Bolt hole, 18, 23... Operation tool, 19, 26... Cylindrical shaft, 32... Support stand, 33... Shaft mounting member, 34
...Bolt, 35...Hole, 36...Tool, V...
valve.

Claims (1)

[Scope of utility model registration request] Support shafts 16 and 17 that rotatably support the cylinder shafts 19 and 26 are connected at both ends to a pair of shaft mounting members 33 fixed to the support base 32, and the cylinder shafts 19 and 26 are connected to the valve V and the operation. In the working vehicle connected to the tools 18, 23, the support shafts 16, 17
The support shafts 16, 17 and the cylinder shaft 1 are arranged so that the cylinder shafts 19, 26 can be inserted into and removed from between the two shaft mounting members 33 by parallel movement in the radial direction of the shafts.
The lengths of 9 and 26 are formed to be approximately equal to the distance between the shaft mounting inner surface of one of the shaft mounting members 33 and the shaft mounting inner surface of the other shaft mounting member 33, and the shafts 9 and 26 penetrate through each of the shaft mounting members 33. Bolt holes 16a are formed in both end surfaces of the support shafts 16 and 17 for the bolts 34,
17a, respectively, and the support shaft and cylinder shaft 1
A valve operating device for a working vehicle, in which a hole 35 is formed in each of the holes 35 for inserting and removing a tool 36 that prevents the tool 36 from rotating together with the bolt 34.