JPH0633776Y2 - Link mounting structure for elevating a riding lawn mower - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a lifting link mounting structure for a riding lawn mower, and more specifically, a forward cantilevered arm is vertically rocked on a fixed portion of the machine. The front end fulcrum of the front link, which constitutes the quadruple link mechanism for moving up and down the mower, is configured to be engageable and disengageable with respect to the engagement groove formed in the front of this arm. The present invention relates to a structure in which an arm can be swingably operated to be fixed in a locked state of a portion.

[Conventional technology]

Conventionally, when mounting the lifting link of a riding lawn mower, the engaging groove is formed in an upward opening shape at the front part of the arm.When the arm is raised and fixed, the front end fulcrum part of the front link is overloaded by the mower. The structure was such that it was securely held in the engagement groove.

[Problems to be solved by the device]

Such a mounting structure for the lifting link is effective when the front end fulcrum is held in the engaging groove, but the opening of the engaging groove remains upward even if the arm is swung downward. Therefore, it was inconvenient because the front-end fulcrum part had to be pulled back and aligned when it was engaged from the opening.

An object of the present invention is to mount a lifting lawn mower attachment structure for a riding lawn mower that can securely hold the front-end fulcrum portion in the engaging groove when the arm is raised and fixed, and can easily engage the front-end fulcrum portion in the engaging groove. Is intended to provide.

[Means for Solving the Problems]

In order to achieve the above object, in the present invention, the engaging groove (21) is formed in a front opening of the front end of the arm (16), and the engaging groove (21) is fixed while the arm (16) is lifted and fixed.
It is characterized in that a contact part (23) for restricting contact of the front end fulcrum part from the contact part is provided on the machine side.

[Action]

That is, since the engagement groove (21) is formed in the front end of the arm (16) in a forward opening shape, as shown in FIG.
When the arm is swung downward, the opening of the engaging groove (21) is directed downward and frontward, and the front end fulcrum portion (13) can be inserted into the engaging groove (21) in almost the same state. Also,
As shown in FIG. 1 (b), when the arm (16) is pivoted upward and fixed, the opening of the engagement groove (21) faces the front upper side, but the engagement groove (21). The front end fulcrum part (13) that is about to be separated from the contact is restricted by the contact part (23) provided on the machine side.

[Effect of device]

According to the lifting link mounting structure for a riding lawn mower according to the present invention, the front end fulcrum portion can be easily inserted into the engagement groove without pulling the front link backward and aligning the front link. Further, when the arm is raised and fixed, the front end fulcrum portion in the engagement groove is securely held and is not detached.

〔Example〕

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

FIG. 4 shows a riding type lawnmower, in which a mower (M) is attached to the lower abdomen of a four-wheeled traveling machine body (A) via an elevating link mechanism (B).

The traveling machine body (A) has an engine section (E) arranged in front of the driving section (1). As shown in FIG. 3, the bonnet (2) covering the engine part (E) has bonnet fittings (4) fixed to the front outer surfaces of the left and right body frames (3), respectively, and further these bonnets are attached. The fulcrum links (5) on the bonnet (2) side are attached to the metal fittings (4) by bolts, and the structure is such that the bolts (6) can be pivotally opened and closed around the shafts.

The fulcrum link (5) passes through a recess (3a) formed in the body frame (3) and swings in the recess (3a). When the bonnet (2) is opened, the fulcrum link (5) swings forward and comes into contact with the front end of the recess (3a). In other words, it is the limit point when opening the bonnet (2). In addition, (7) in the figure is a plain washer,
(8) is an anti-vibration rubber.

The elevating link mechanism (B) comprises a quadruple link mechanism and an elevating operation mechanism (10). The quadruple link mechanism lays a pair of left and right front links (9A) across the front lower part of the traveling body (A) and the front end of the mower (M), and at the same time, the central lower part of the traveling body (A) and the mower. The rear link (9B) is installed over the rear part of (M), and has the function of maintaining a horizontal posture regardless of where the mower (M) is moved up and down. Further, the lifting operation mechanism (10) swings the lifting link mechanism (B) up and down in conjunction with the operation of the height adjustment lever (12) arranged in the operating section (1) to lift the mower (M). It is for. In addition, a front end fulcrum shaft (13) as a front end fulcrum part is installed over the front ends of the left and right front links (9A), and the front link (9A) uses this front end fulcrum shaft (13) as a fulcrum. It is designed to rock.

Next, the mounting structure of the front link (9A) to the traveling machine body (A) will be described in detail. As shown in FIG. 1 and FIG. 2, support plates (14
A) and (14B) are fixed to each other, and a single shaft (15) is supported between these support plates (14A) and (14B). To the left and right of this axis (15) are the arms (16A), (16B)
And a link fulcrum lever (17) is provided at the left end. By operating the link fulcrum lever (17) forward and backward, the arms (16A) and (16B) are vertically swung integrally.

The left arm (16A) is bent in a V shape, and a lock mechanism (R) is attached to the rear end thereof. This lock mechanism (R) is one in which a lock pin (19) is projected from a spring holder (18), and the arms (16A) and (16B) are swung upward to support the lock pin (19) on a support plate ( By inserting the pin hole (20) of 14A), the arm (16A), (16B)
Can be fixed in a raised state. These arms (16
A), (16B) at the front end, engaging groove (21) with a forward opening
The front end fulcrum shaft (13) is engaged with these engagement grooves (21).

When inserting the front end fulcrum shaft (13) into the engaging groove (21), the link fulcrum lever (17) is swung forward to swing the arms (16A) and (16B) downward, The opening of the engagement groove (21) faces forward and downward. Then, insert the front-end fulcrum part (13) into the engaging groove (21), and while maintaining this state, operate the link fulcrum lever (17) backwards to swing the arms (16A) and (16B) upward. To move. Then, when it goes up, the lock pin (19) is inserted into the lock hole (20) and fixed. In this state, the front end fulcrum shaft (13) is maintained deep inside the engagement groove (21) due to the excessive weight of the mower (M). Moreover, even if the front part of the mower (M) suddenly climbs up the raised soil or stone during the work, and the impact causes the front end fulcrum shaft (13) to be pushed up, the contact plate formed on the support plate (14A). Since this department (23) will restrict the movement upward,
The front end fulcrum shaft (13) does not come off from the engagement groove (21).

When pulling out the front end fulcrum shaft (13) from the engaging groove (21), after pulling out the lock pin (22) to release the lock mechanism (R), swing the link fulcrum lever (17) forward. Rock the arms (16A) and (16B) downward. As a result, the front end fulcrum shaft (13) is lowered to ground the front part of the mower (M) to the ground to prevent the front end fulcrum shaft (13) from being overloaded by the mower (M). ) Is pulled out from the engaging groove (21).

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 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 lifting link mounting structure for a riding lawn mower according to the present invention. FIGS. 1 (a) and 1 (b) are side views of the link connecting portion, and FIG. 2 is a vertical section of the link connecting portion. FIG. 4 is a rear view, FIG. 3 is a side view of the front part of the machine frame, and FIG. 4 is an overall side view of the riding lawn mower. (9) …… Quad link mechanism, (9A) …… Front link,
(13) …… Front end fulcrum part, (16A), (16B) …… arm,
(21) …… Entrance groove, (23) …… Implementing part.

Claims (1)

[Scope of utility model registration request] Claims: 1. Arms (16A), (16B) in a forward cantilever attitude are provided on a fixed portion of the machine (A) side so as to be vertically swingable,
A four-link mechanism (9) for lifting and lowering the mower with respect to the engaging groove (21) formed in the front portions of the arms (16A) and (16B).
The front end fulcrum (13) of the front link (9A) that constitutes the above is configured to be engageable and disengageable, and the arms (16A) and (16B) are swung upward while the front end fulcrum (13) is engaged. And a fixing link mounting structure for a riding lawn mower, which is configured to be able to be fixed by using the engaging groove (21) in the arms (16A), (16).
B) is formed in a front opening at the front end, and when the arms (16A) and (16B) are fixed in a raised state, the engagement groove (21) is formed.
The lifting link mounting structure for a riding lawn mower, which is provided with a contact portion (23) for restricting the separation of the front end fulcrum portion (13) from the contact portion on the machine side.