JPS5821802Y2 - Engagement structure of a stand for lifting wheels in a walk-behind mobile agricultural machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an engagement structure for a stand for lifting wheels in a walking type mobile agricultural machine.

Conventionally, to replace a punctured wheel, etc.,
As seen in Japanese Patent No. 28967, a stand for lifting a wheel is attached to a hitch or a connection point of a working device, and a punctured wheel is lifted by a three-point grounding condition of the front end of the front frame, the wheel, and the stand.

According to this conventional structure, the front end of the front frame is in contact with the ground, the tire on the punctured side is lifted up by artificial means, and the stand is inserted from under the hitch in that state and it is moored up. However, there was a drawback that it required a lot of effort to change the wheels.

The object of the present invention is to provide an inexpensive stand structure that can solve the above-mentioned drawbacks.

The feature of the engagement structure of the stand for lifting wheels in a walk-behind mobile agricultural machine of the present invention is that a pair of left and right front frames extending forward from the wheel position are connected to each other via a pipe stay. , the pipe stay has
A receiver for the horizontal rod member of a T-shaped stand equipped with a horizontal rod member at the top has a surface formed on the upper peripheral portion, and the horizontal rod member is inserted into the side portion from the radially lateral outer side of the pipe stay. In addition to forming a possible opening, the lower local part is provided with a hanging surface having a notch for engagement with the support rod,
The T-shaped stand is configured to be engageable.

In other words, the stand is configured to hang from the lower part of the front frame, so when replacing a flat wheel, etc., hang the stand in advance with the aircraft in a horizontal position, and then attach the handle. By tilting the aircraft so that the front end of the front frame is in contact with the ground, the center of gravity of the aircraft is moved forward, and the front end of the front frame, the stand, and the wheel on the opposite side of the punctured wheel are used to move the center of gravity forward. A three-point grounding condition can be obtained.

This allows you to hold the handle and tilt the aircraft horizontally so that the front end of the front room is on the ground, with the flat wheel side floating, and connect the stand to the hitch in that state. This has the advantage that wheel replacement can be done with less labor than in the case of conventional vehicles.

Furthermore, since the stand is configured to be engaged and held by forming a notch in the pipe stay that connects and reinforces the pair of left and right front frames, there is no need for an engagement and holding member dedicated to the stand.

In addition, since the stand can be engaged with the pipe stay from the outside in the radial direction of the pipe, this is compared to, for example, a case where the stand can be engaged with the pipe stay from the axial direction of the pipe. As a result, there is no need to form a cutout groove for inserting the stand support rod in the side surface of the front frame, and the manual labor can be omitted, making it possible to make the stand engagement structure inexpensive.

Furthermore, since a T-shaped stand with a horizontal rod member on the head is used, the stand head makes a wide surface contact with the stay, and the stand consisting of a rod-shaped body is simply inserted into the stay from below and locked. Compared to the case where the stand head is not locally abutted against the stay, there is an advantage that there is no need to cause deformation of the stay or to make the stay stronger than necessary.

Embodiments of the present invention will be described below with reference to the drawings.

An engine 3 is mounted on a pair of left and right front frames 2, 2 which are reinforced by installing a pipe stay 1, and a pair of left and right wheels 5°5 are mounted on the rear via a transmission 4, and a hitch 6 is connected to the engine 3. The handle 7 is extended to the rear of the machine, and a tilling device (not shown) or the like can be connected thereto to constitute a walking agricultural machine.

To construct the stand 8 for lifting and supporting the aircraft when replacing the wheels 5, there is a vertical rod member 10b on the head side of the support rod 9, which utilizes the vertical shaft portion of the support rod 9, and a vertical rod member 10b extending approximately perpendicular thereto. A horizontal rod member 10a is provided to form a detachable mounting portion 10 for the stay 1, and a ground plate 11 is pivotally mounted on the bottom side of the support rod 9.

In the pipe stay 1, a surface 1a is formed on the upper peripheral part of the support for the horizontal rod member 10a of the stand 8, and the horizontal rod member 10a can be inserted from the outside in the radial direction of the pipe. In addition to forming an opening 12, a hanging surface 1b having a notch 13 for engagement with the support rod 9 is provided on the lower peripheral portion.

When using the stand 8, the mounting part 10
is fitted into the stay 1 from the front side of the fuselage through the stay opening 12, and from the fitted state, the stand 8 is swung downward to communicate the vertical rod member 10b with the opening 12 and installed on the lower side of the fuselage. The support rod 9 is inserted into the notch 13 to prevent the stand 8 from moving in the left-right direction of the aircraft body, and the weight of the aircraft is applied to bring the horizontal rod member 10a and the stay 1 into contact with each other. By fixing the long horizontal rod member 10a to the vertical rod member 10b to form the approximately T-shaped mounting portion 10, the stay 1 can be maintained in an upright state. The structure is such that the compensating pressure of the horizontal rod member 10a is small.

The notches 13 are provided on the left and right sides, and the notches 13 with which the stand 8 is to be engaged are selected by the wheel 5 to be lifted.

[Brief explanation of drawings]

The drawings show an embodiment of the stand for lifting wheels in a walk-behind mobile agricultural machine according to the present invention, FIG. 1 is a side view in use, FIG. 2 is a front view in use, and FIG. 3 is a perspective view of the stand. FIG. 4 is a perspective view showing the state of contact with the stay. 1... Pipe stay, 1a... Receiving surface, 1b... Hanging surface, 2... Frame, 5... Wheel, 8...Stand, 9
...Support rod, 10a...Horizontal rod member, 1
2...Opening, 13...Notch.

Claims (1)

[Scope of utility model registration request] A pair of left and right front frames 2, 2 extending forward from the positions of the wheels 5, 5 are connected via a pipe stay 1, and the pipe stay 1 is provided with a horizontal rod member 10a.
The horizontal rod member 10a of the T-shaped stand 8 having a
The receiver has a surface 1a formed in the upper local part, an opening 12 in the side part into which the horizontal rod member 10a can be inserted from the radially lateral outer side of the pipe stay 1, and an opening 12 in the lower peripheral part. A stand for lifting wheels in a walking type mobile agricultural machine, characterized in that a hanging surface 1b is provided with a notch 13 for engagement with a support rod 9, and is configured to be engageable with a T-shaped stand 8. The cohesive structure of