JPS63114326U

JPS63114326U -

Info

Publication number: JPS63114326U
Application number: JP641387U
Authority: JP
Priority date: 1987-01-19
Filing date: 1987-01-19
Publication date: 1988-07-23
Anticipated expiration: 2002-01-19
Also published as: JPH0517702Y2

Description

[Brief explanation of the drawing]

図面は本考案に係る作業車のバルブ操作構造の
実施例を示し、第１図は操作レバーとバルブの連
係構造を示す斜視図、第２図は第１、第２、第３
ベルクランクと連動杆及びロツドの連係部を示す
平面図、第３図は第２図における―線の一部
断面を示す矢視図、第４図は平面から見た要部作
用説明図、第５図は正面から見た要部断面図、第
６図は操作レバーと第１、第２連動杆の連動構造
を示す側面図、第７図はバツクホウ作業車の全体
側面図、第８図は従来例を示す一部断面図である
。１４Ｂ……操作レバー、１９Ａ，１９Ｂ，１９
Ｃ……ベルクランク、２２Ａ……第１ロツド、２
２Ｂ……第２ロツド、２３Ａ，２３Ｂ，２３Ｃ，
２３Ｄ……ジヨイント部、２４Ａ，２４Ｂ……位
置決め部材、２５Ａ，２５Ｂ……固定装置、３４
……スプリング、Ｖ_３，Ｖ_４……バルブ、Ｑ……
横軸芯。 The drawings show an embodiment of the valve operation structure for a working vehicle according to the present invention, and FIG. 1 is a perspective view showing the linkage structure between the operation lever and the valve, and FIG.
FIG. 3 is a plan view showing the connecting portion of the bell crank, interlocking rod, and rod; FIG. 3 is a partial cross-sectional view taken along the - line in FIG. Figure 5 is a sectional view of the main parts seen from the front, Figure 6 is a side view showing the interlocking structure of the operating lever and the first and second interlocking rods, Figure 7 is an overall side view of the backhoe work vehicle, and Figure 8 is It is a partial sectional view showing a conventional example. 14B...Operation lever, 19A, 19B, 19
C...Bell crank, 22A...1st rod, 2
2B...Second rod, 23A, 23B, 23C,
23D...Joint part, 24A, 24B...Positioning member, 25A, 25B...Fixing device, 34
...Spring, _V3 , _V4 ...Valve, Q...
Horizontal axis.

Claims

[Claims for Utility Model Registration] 1. A first interlocking state in which the forward and backward swinging of the operating lever 14B is linked to the first valve _V3 for the working device, and the left and right swinging is linked to the second valve _V4 for the working device and the back and forth rocking of the operating lever 14B is controlled by the second
The first, second, and _third bell cranks 19 are connected to the valve _V4 and switched to a second interlocking state in which the left-right swing is connected to the first valve V3.
A, 19B, and 19C are arranged side by side so as to be rotatable around the same horizontal axis Q, and a first joint part 23A is integrally connected to the second bell crank 19B, and a first joint part 23A is integrally connected to the third bell crank 19C. A first rod 22A is disposed between the second joint portion 23B, and the third joint portion 23C and the first bell crank 19A are integrally connected to the third bell crank 19C.
A second rod 22B is disposed between a fourth joint portion 23D integrally connected to the joint portion, and the first joint portion 23A and the first rod 22A are fitted and connected, and the third joint portion 23C and the first rod 22A are fitted and connected. Second
The rod 22B is fitted and connected to form the first interlocking state, and the second joint portion 23B
and the first rod 22A are fitted and connected, and
The fourth joint portion 23D and the second rod 2
The first rod 22A is pivotably supported relative to the first and second joint portions 23A and 23B so as to be movable near and far, so as to form the second interlocking state by fitting and connecting the rods 2B and 2B. A valve operation structure for a work vehicle in which a second rod 22B is pivotally supported to the third and fourth joint portions 23C and 23D so as to be movable near and far, and in the first interlocking state, the first
a first lock position where the rod 22A is prevented from moving toward the second joint portion 23B by contacting the second bell crank 19B;
In the interlocking state, the first rod 22A is placed in a second lock position that prevents the first rod 22A from moving toward the first joint portion 23A by contacting the third bell crank 19C. A first positioning member 24A is attached to the first rod 22A so as to be freely changeable in position around the axis, and the third positioning member 24A prevents the second rod 22B from moving toward the fourth joint portion 23D in the first interlocking state. bell crank 1
9C, and in the second interlocking state, the second rod 22B is prevented from moving toward the third joint portion 23C by contact with the first bell crank 19A. The second rod 22B is placed in a fourth lock position where it is blocked by a locking mechanism.
The second positioning member 2 can be moved freely around the axis of the second positioning member 2.
4B to the second rod 22B, and
a first fixing device 25A for fixing the positioning member 24A at the first lock position or the second lock position;
A second fixing device 25B is provided on the first rod 22A and fixes the second positioning member 24B at the third lock position or the fourth lock position.
Valve operation structure for the work vehicle installed on Rod 22B. 2 The first and second positioning members 24A, 24B
are attached to the first and second rods 22A, 22B so as to be movable in the respective axial directions, and the first and second fixing devices 25A, 25B are attached to the first and second rods 22A, 22B, respectively. A fixed receiving member, and a spring 3 that presses the first and second positioning members 24A and 24B to the receiving member separately.
4. A valve operating structure for a working vehicle as set forth in claim 1 of the utility model registration claim.