JPH081605Y2 - Working device of work vehicle Rolling detection device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a working vehicle in which a lift arm that is swingably mounted on a traveling machine body and a lower link that is vertically swingable are connected by a rolling cylinder. A working device rolling detection device.

[Conventional technology]

The work vehicle is configured to perform the rolling operation of the connecting work device with respect to the traveling machine body by swinging the lower link by expanding and contracting the rolling cylinder.

In this type of work vehicle, in the past, for example,
As disclosed in Japanese Patent Laid-Open No. 134008, there is a configuration in which a potentiometer is used to detect a rolling angle of a coupling working device based on a stroke of a rolling cylinder and to electrically take out a detection result. That is, the telescopic potentiometer is directly connected to the rolling cylinder so as to be operated by the telescopic operating force of the rolling cylinder.

[Problems to be solved by the device]

In the conventional detection device, the potentiometer is directly connected to the rolling cylinder, so that the entire potentiometer is exposed behind the traveling machine body, and one end of the potentiometer is at a relatively low position where it is substantially at the same level as the lower link. Since it is located at, it is easy for rainwater and muddy water splashed by wheels to adhere, and it is easy to inhale water inside due to the expansion type, so it is easy to absorb rainwater and muddy water. The failure of the potentiometer due to this was likely to occur. Further, since one end of the potentiometer is located at a relatively low position where the potentiometer is at substantially the same level as the lower link, there is a risk that adverse effects such as entanglement of tall weeds may occur.

The object of the present invention is a detection device that detects the rolling angle based on the stroke of the rolling cylinder with a potentiometer and electrically extracts the detection result. The purpose is to make it easy to obtain what is difficult to generate.

[Means for solving the problem]

The working device rolling detection device according to the present invention is characterized in that the working vehicle rolling device is constructed by connecting a lift arm that is swingably mounted on the traveling machine body and a lower link that is swingably mounted on the traveling machine body by a rolling cylinder. In the rolling detection device, a rotary potentiometer is attached to the rolling cylinder through a release wire in which one end side of the inner wire is arranged along the extension / contraction direction of the rolling cylinder between the tip of the cylinder rod and the cylinder body. It is arranged in the space below the seat mounting portion of the traveling machine body so as to be interlocked and located in front of the swing operation range of the lift arm and at substantially the same level as the swing fulcrum of the lift arm. There is a point.

[Action]

When the rolling cylinder is expanded and contracted, the expansion and contraction operating force is transmitted to the traveling machine body through the release wire to operate the rotary potentiometer. Therefore, regardless of its operation, a rotary type that does not absorb water, such as a telescopic type, is used as the potentiometer, and the potentiometer is located in front of the swing operation range of the lift arm and as Position the potentiometer in the space below the seat attachment part of the traveling aircraft covered with the fuselage accessory members such as the fender and the upper fuselage cover so that they are located at approximately the same level. Even if it is difficult to cause the problem, the potentiometer can be operated as the rolling cylinder expands and contracts.
In addition, the inner wire of the release wire is pushed and pulled along the extension / contraction direction of the rolling cylinder with the same operation amount as the extension / contraction operation of the rolling cylinder, and the potentiometer is operated with the operation amount. Become. Further, since the potentiometer is positioned in front of the swinging range of the lift arm and at substantially the same level as the swinging fulcrum of the lift arm, the curvature of the release wire that links the rolling cylinder and the potentiometer can be reduced. Since the size can be reduced, the inner wire of the release wire can be smoothly pushed and pulled with the expansion and contraction operation of the rolling cylinder.

[Effect of device]

Therefore, because of the interlocking with the release wire, the rolling angle can be detected based on the stroke of the rolling cylinder and the detection result can be taken out electrically, but the potentiometer can be installed to prevent rainwater from adhering and rotate. By using the formula, it is possible to prevent inhalation of water, and it becomes possible to make the potentiometer failure due to rainwater less likely to occur and to have high reliability.

In addition, since the accessory member of the traveling machine body can be used as the cover, the structure can be simplified so that a special cover is not required, and the economical advantage can be achieved.

Moreover, since one end of the inner wire is arranged between the tip of the cylinder rod and the cylinder body along the extension / contraction direction of the rolling cylinder, the space below the seat mounting portion of the traveling machine body far away from the rolling cylinder. Although it is a rotary potentiometer attached to, the stroke of the rolling cylinder can be detected directly and accurately.

In addition, the curvature of the release wire is made smaller so that the push-pull operation of the inner wire of the release wire can be performed smoothly. As a result, the detection speed and the detection accuracy can be further improved.

〔Example〕

 Next, examples will be shown.

As shown in FIG. 3, a hydraulic cylinder (2) is provided above the mission case (1) forming the rear part of the tractor body.
A pair of left and right lift arms (3a), (3b) mounted so as to be driven to swing up and down by a pair of left and right lower links (4a), (mounted on the lower part of the mission case (1) so that they can swing vertically. 4b), a rolling cylinder (5) connecting one lift arm (3b) and one lower link (4b), and a lift rod (5) connecting the other lift arm (3a) and the other lower link (4a). 6), the rotary tiller (8) is connected to the mission case (1) through a link mechanism having a top link (7) mounted on the rear wall portion of the mission case (1) so as to be vertically swingable, and The tiller is configured to be transmitted from the mission case (1) to the tiller (8) through the rotary shaft (9), and the tiller is operated by swinging the lift arms (3a) and (3b) by the hydraulic cylinder (2). (8) As the lifting operation on the tractor and plow the oscillating operation of the lower link (4b) by a rolling cylinder (5) (8)
The riding-type cultivator is configured so as to perform a rolling operation on the tractor.

As shown in FIG. 1 and FIG. 2, the upper part of the mission case (1) is covered by a cover (10) which also serves as a seat mounting member, and the lateral sides are covered by a rear wheel fender (11). A rotary potentiometer (12) is installed in the space below the seat mounting part where it is difficult for rainwater to splash, in front of the swinging range of the lift arm (3b), and
The potentiometer (12) is installed so that it is located at approximately the same level as the swing fulcrum of the lift arm (3b).
Is connected to the rolling cylinder (5) through a push-pull type release wire (13) to detect the rolling direction and rolling angle of the tiller (8) with respect to the tractor based on the stroke of the rolling cylinder (5). The tilling device rolling detection device is configured to electrically extract the detection result. That is, one end of the release wire (13) on the cylinder side of the inner wire (13a) is connected to the cylinder rod (5a) of the rolling cylinder (5) connected to the lower link side, and the outer wire of the release wire (13) is connected. The cylinder side end of (13b) is connected to the cylinder body (5b) of the rolling cylinder (5) connected to the lift arm side, and the one end side of the inner wire (13a) is connected to the cylinder rod (5a). Arranged between the tip and the cylinder body (5b) along the expansion and contraction direction of the rolling cylinder (5),
In addition, the inner wire (13
When the other end of the potentiometer side of a) is connected to the arm type operation part (12a) of the potentiometer (12) and the rolling cylinder (5) is expanded and contracted, the expansion and contraction operating force is released wire (13). The operation part (12a) is configured to be oscillated by being transmitted to the potentiometer (12) via the, and the changing direction of the electric resistance expressed by the potentiometer (12) is either the increasing side or the decreasing side. The rolling direction is determined by knowing that, and the rolling angle is determined by knowing the changed value of the electric resistance.

As shown in FIG. 2, the gravity type inclination sensor (14) attached to the mission case (1) is used to detect the direction and angle of the left and right inclination of the tractor and to electrically take out the detection result. As shown in FIG. 1, a target angle calculation mechanism (15) linked to the tilt sensor (14),
The potentiometer (12) is linked to the electromagnetic control valve (17) of the rolling cylinder (5) via the rolling control mechanism (16) so that the left and right tillage depths are the same or substantially the same regardless of the left and right inclination of the tractor. It is configured so that work can be performed while maintaining the same. That is, as the detection result of the tilt sensor (14) changes, the target angle calculation mechanism (15) causes the difference between the left plowing depth and the right plowing depth regardless of the change in the information from the tilt sensor (14). The target angle for the rolling control of the tiller (8) is automatically calculated so that is within the set range, and is output to the rolling control mechanism (16). A valve operation for the rolling control mechanism (16) to extend and contract the rolling cylinder (5) so that the calculated target angle from the target angle calculation mechanism (15) and the detected angle from the potentiometer (12) are the same. Signal control valves (17)
It outputs it automatically.

[Another embodiment]

The present invention can be applied to various work vehicles such as rice transplanters as well as tillers. Therefore, the tiller rolling detection device is referred to as a work device rolling detection device.

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

[Brief description of drawings]

The drawings show an embodiment of a working device rolling detection device for a work vehicle according to the present invention. Fig. 1 is a side view of the rolling detection device, Fig. 2 is a rear view of a potentiometer mounting portion, and Fig. 3 is a riding-type tiller. It is a schematic perspective view of a machine rear part. (1) …… Transport vehicle, (3b) …… Lift arm, (4b)
…… Lower link, (5) …… Rolling cylinder,
(5a) …… Cylinder rod, (5b) …… Cylinder body,
(12) …… Rotary potentiometer, (13) …… Release wire, (13a) …… Inner wire.

Claims (1)

[Scope of utility model registration request] 1. Work of a work vehicle in which a lift arm (3b) mounted on a traveling machine body (1) so as to be swingable and a lower link (4b) mounted so as to swing vertically are connected by a rolling cylinder (5). The device is a rolling detection device, wherein a rotary potentiometer (12) is provided with an inner wire (13a) having one end side extending and contracting the rolling cylinder (5) between the tip of the cylinder rod (5a) and the cylinder body (5b). Via a release wire (13) arranged along the direction, and in conjunction with the rolling cylinder (5), in front of the swing operation range of the lift arm (3b) and the lift arm (3). A work device rolling detection device for a work vehicle, which is arranged in a space below the seat mounting portion of the traveling machine body (1) so as to be located at substantially the same level as the swing fulcrum of 3b).