JPH083210Y2 - Displacement sensor mounting structure for ground work equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is equipped with a connecting mechanism which is moved up and down by the operation of an actuator in a traveling machine body, and a ground work device is detachably connected to the connecting mechanism to provide a ground connection. The grounding body for ground height detection provided on the work device and the displacement sensor provided on the traveling machine body are linked through a mechanical displacement transmission link mechanism, and the actuator is controlled based on the detection result of the displacement sensor. The present invention relates to a displacement sensor mounting structure for a ground work device including a control system for maintaining the ground work device at a predetermined ground height.

[Conventional technology]

As the above-mentioned structure,
There is one disclosed in Japanese Patent No. 9 and in this conventional example, a ground working device is provided for a link device (coupling mechanism), a displacement transmission linking mechanism is composed of a wire, and one end of the wire is a grounding member And the other end is linked to a control system of a hydraulic cylinder as an actuator.

[Problems to be solved by the device]

However, in the case where a wire is provided between the ground working device and the traveling body like the conventional example, an operation of connecting the wire is required when the ground working device is mounted, and the operator is required each time the ground working device is mounted. There is room for improvement in that it requires time and effort, such as having to get off the tractor pilot's seat and work.

Further, in recent years, a structure has been adopted in which the ground work device can be attached to the lifting link mechanism as the connecting mechanism while the operator is on the tractor. It is desired that the wire can be easily connected from the ground work device to the control system of the traveling body when the vehicle is mounted.

An object of the present invention is to obtain a structure in which an operator can switch a displacement transmission linking mechanism such as a wire to a linked state without much labor when the ground work device is mounted.

[Means for solving the problem]

The features of the present invention are, as described at the beginning, that the ground working device is detachably connected to the connecting mechanism that is moved up and down by the operation of the actuator, and the grounding body for sensing the ground working device,
A ground system comprising a control system that links the displacement sensor of the traveling machine body through a displacement transmission link mechanism and controls the actuator based on the detection result of the displacement sensor to maintain the ground work device at a predetermined ground height. In the displacement sensor mounting structure of the working device, the connecting mechanism is provided with a detachable portion that can be switched between a state in which the ground working device is mounted and a state in which the ground working device is detached, and the connecting mechanism for displacement transmission is connected to the traveling body side in the middle thereof. A pair of rocking members mounted so as to be rockable around a horizontal axis are provided on the ground working device side, and one of these rocking members is hooked to the other hook part. And a cam surface that guides the locking portion to the hook portion in accordance with abutment swing due to mutual approach of the swing members associated with mounting operation of the ground work device at the detachable portion. On one of the swing members It becomes the point formed by constituting the automatic connection portion for switching the engagement connection state the two swinging members Te, its action and effects are as follows.

[Operation] According to the above feature, when the ground work device is mounted via the detachable part, the locking pin is engaged with the hook part by the relative swing of both swing members in accordance with this mounting operation, The automatic connecting portion switches both swinging members to the engaged and connected state. That is, in the structure of the present invention, both rocking members are switched to the engaged connection state by the engagement utilizing the operation when the ground work device is mounted, and the engagement connection is performed by the locking portion pin and the hook portion. Is simple, and the operator only has to perform the operation of mounting the working device when performing this engagement and connection, and does not have to perform other operations.

[Effect of device]

Therefore, whether the worker sits in the cockpit and wears the ground work device, or the work form in which the worker mounts the ground work device using bolts or the like, the worker automatically mounts the work without any trouble. Thus, a structure is obtained in which the linkage mechanism for displacement transmission can be switched to the linkage state.

〔Example〕

As shown in FIG. 3, a cultivating device (3) as a ground working device is attached to a rear end of an agricultural tractor (1) as a traveling machine body through a three-point link mechanism (2) as a connecting mechanism which is vertically movable. The structure will be described. The three-point link mechanism (2) includes a lower link (5) driven by a pair of left and right lift arms (4) driven by an elevating cylinder (31) as an actuator,
And (5), lift rods (6) and (6) for connecting the lower links (5) and (5) to the lift arms (4) and (4), and the rear end bracket (7). It comprises a top link (8) and an arch frame (9) having an arch shape in a front view, which connects the top link (8) and the rear ends of the left and right lower links (5), (5).

On the other hand, the tiller (3) has the input case (1
1) Top mast (1) extending forward and upward
0), a support arm (12) stretched on both left and right sides of the input case (11), and a lower link fastening bracket (13) projecting forward from the support arm (12).
And a transmission case (14) extending from the outer ends of both support arms (12), a cultivating rotary (15) pivotally supported between both transmission cases (14), (14), and this cultivating rotary. It comprises a tilling cover (16) for the (15) and a grounding body (32) mounted at the rear end of the tilling cover (16) so as to be vertically swingable.

Next, the attachment / detachment structure for the three-point link mechanism (2) of the tiller (3) will be described. As shown in FIG. 1, a connecting bracket (1) with the top mast (10) is provided at a connecting portion between the top link (8) and the arch frame (9).
7) is provided and this connecting bracket (17)
An engaging groove (17A) into which the connecting pin (10A) on the side of the top mast (10) is inserted is provided in the. On the other hand, a lateral engagement pin (5A) is provided inwardly at the rear end of the lower link (5), and the lateral engagement pin (5A) is engaged with the lower link fastening bracket (13). A retaining piece (19) of U-shaped cross section for holding is provided. Further, when the lateral engagement pin (5A) is fitted into the fastening piece (19), the lateral engagement pin (5A) automatically projects into the fitting space of the lateral engagement pin (5A) to prevent the lateral engagement pin (5A) from coming off. The retaining pin (20) is provided so as to be biased in the protruding direction, and the retaining pin (20) is received and supported in the standby position, and the fastening piece (19) is supported.
It is pushed out of the insertion space of the lateral engagement pin (5A) by abutting against the lateral engagement pin (5A) fitted inside, and the engagement prevention state of the retaining pin (20) is released to release the retention pin. A lateral engagement pin check plate (21) is provided which allows the lateral engagement pin (5A) to project into the insertion space. As described above, the connection bracket (17), the connection pin (10A), the sideways engagement pin (5A), the fastening piece (19), etc. are connected to the traveling body side three-point link mechanism (2) of the tiller (3).
It is referred to as non-detachable (A).

The mounting work of the cultivating device (3) having the above configuration will be described. The cultivating device (3) which is self-supported in a slightly tilted posture.
In contrast, the tractor (1) is approached in the reverse state, and the connecting bracket (17) and the rear end of the lower link (5) are
The top mast side connecting pin (10A) and the fastening piece (1
Position it below 9). When the three-point link mechanism (2) is raised in this state, the connecting pin (10A) enters the engaging groove (17A) of the connecting bracket (17) and is connected. When the three-point link mechanism (2) is lifted as it is, it swings forward of the tiller (3) with the connecting pin (10A) axis as a fulcrum, and the lateral engagement pin (5A) causes the fastening piece (19). And the retaining pin (20) projects further to complete the fastening.

On the other hand, in the structure for transmitting power to the tiller (3), the universal joint part (22) extended from the machine side is supported between the left and right lower links (5) and (5), and the universal joint is also supported. An operating lever (23) for moving the part (22) back and forth is provided to face or slightly engage the tiller (3) side input shaft (24) in a state where the fastening of the three-point link mechanism (2) is completed. The operator can operate the rear universal joint (22) from the cockpit by operating the lever (23).
The rear universal joint (22) and the input shaft (24) can be spline-fitted by moving the rear universal joint (22) backward.

Next, the displacement transmission linking mechanisms (26), (28) to the displacement sensor (25) for detecting the swing amount of the grounding body (17) based on the change in the grounding pressure will be described. The displacement transmitting linkage mechanisms (26) and (28) are extended along the lift rod (6) and the lower link (5) from a potentiometer type displacement sensor (25) provided on the tractor (1) side. The release wire (26), the arm (27) swinging integrally with the grounding body (32), and the fastening piece (19) which is linked to the arm (27) and is located above the tilling cover (16). It consists of a connecting rod (28) extended to the vicinity. Then, at the rear end of the release wire (26), as one swinging member biased upward, a locking portion (29
A bell crank type engagement arm (29) having a) is provided, and the front end of the connecting rod (28) can be engaged with and disengaged from the locking portion (29a) of the bell crank type engagement arm (29). A hook-shaped arm (30) serving as the other swinging member having a different hook portion (30a) is provided, and these are automatically linked with attachment / detachment of the three-point link mechanism (2) of the tiller (3). An automatic connection portion (B) that switches the engaged and connected state is configured.

Further, the bell crank type engagement arm (29) is supported at the lower part of the lower link (5) so as to be swingable around a lateral axis.
The hook-shaped arm (30) is swingably supported on a side portion of the tiller (3) about a lateral axis, and when the tiller (3) is attached to the three-point link mechanism (2), the hook-shaped arm (30) described above is used. So that the connecting bracket (17) and the rear end of the lower link (5) are respectively connected to the top mast side connecting pin (10A) and the fastening piece (1).
9), the three-point link mechanism (2) is moved up and the operation is performed to raise the three-point link mechanism (2).
As shown in (c), the bell crank type engagement arm (29) and the hook-shaped arm (30) in the separated state come close to each other with the attachment, and the locking portion of the bell crank type engagement arm (29). The (29a) comes into contact with the cam surface (30b) formed on the side of the hook-shaped arm (30) so as to swing relative to each other, and this swing causes the locking portion (29a) to hook. When the posture to engage with the hook portion (30a) of the arm (30) is reached, the locking portion (29a) engages with the engagement recess (30a) and the bell crank type engagement arm (29) and the hook-shaped arm The (30) and (30) are automatically switched to the engaged and coupled state, and the swing amount based on the change in the ground pressure of the grounding body (17) is used for the displacement transmission linkage mechanism (26), (28).
It is transmitted to the displacement sensor (25) via.

A signal from the displacement sensor (25) is a control device (not shown).
Is used to control the raising and lowering of the tilling device (3) so as to keep the tilling depth of the tilling rotary (15) constant by operating the elevator cylinder (31).

[Other embodiment] The above-mentioned embodiment is a rice transplanter with detachable planting section,
Applicable to those with other working devices.

The desorption structure of the cultivating device (3) does not necessarily have to be a structure that can be performed by only one operator.

The displacement transmission linkage mechanisms (26) and (28) include:
You may comprise only a release wire or only a link mechanism.

The control by the displacement sensor (25) may be used for rolling control.

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 THE DRAWINGS The drawings show an embodiment of a displacement sensor mounting structure for a ground work device according to the present invention. FIG. 1 is a side view showing a connecting mechanism and a displacement transmitting linking mechanism, and FIG. FIG. 3 is a front view showing the mechanism and the displacement transmission linking mechanism, FIG. 3 is a side view showing a state before attachment of the tilling device, and FIG. 4 is an action diagram showing the linkage state of the displacement transmission linking mechanism. (1) …… Running machine, (2) …… Coupling mechanism, (3) ……
Ground work device, (25) …… Displacement sensor, (26), (28)
...... Coupling mechanism for displacement transmission, (29) ...... Rotating member, (29
a) …… Locking part, (30) …… Rotating member, (30a) …… Hook part, (30b) …… Cam surface, (31) …… Actuator, (32) …… Grounding body, (A ) …… Removable part, (B) ……
Automatic swing unit.

Claims (1)

[Scope of utility model registration request] 1. A traveling machine body (1) is provided with a connecting mechanism (2) which is moved up and down by the operation of an actuator (31), and the ground working device (3) is detachably connected to this connecting mechanism (2). , A grounding body (32) provided on the ground work device (3) for ground height sensing, and a displacement sensor (25) provided on the traveling body (1).
Are linked via a mechanical displacement transmission link mechanism (26), (28), and the actuator (31) is controlled based on the detection result of the displacement sensor (25) to determine the ground work device (3). Is a displacement sensor mounting structure for a ground work device, comprising a control system for maintaining the ground work height of the ground work device, wherein the connection mechanism (2) is switched between a state in which the ground work device (3) is attached and a state in which the work mechanism is disconnected. A free detachable part (A) is provided, and in the middle of the displacement transmission linkage mechanisms (26) and (28),
A pair of rocking members (29) and (30) mounted so as to be rockable around a horizontal axis are provided on the traveling machine body (1) side and the ground work device (3) side, respectively, and these rocking members are arranged. Moving member (29),
One of the (30) is provided with a hook portion (30a), the other is provided with a locking portion (29a) to be locked by the hook portion (30a), and the ground working device (a) at the detachable portion (A) ( A cam surface (30b) that guides the locking portion (29a) to the hook portion (30a) in accordance with abutment swing of the swing members (29) and (30) due to mutual approach accompanying the mounting operation of (3). ) Is provided on the one swinging member (30), and an automatic connecting portion (B) for switching the swinging members (29) and (30) to the engaged and coupled state is configured. Mounting structure.