JPH0488913A - Device for installing front mower - Google Patents

Abstract

PURPOSE:To obtain the subject device for lifting up also the back of a mower deck high in lifting the mower deck by arranging a pair of left and right links in the front of a machine body and linking members pivoted in the intermediate part thereof in a specific state between the mower deck and the machine body. CONSTITUTION:A pair of left and right links 5 and 5 are pivoted so as to enable rotation in the vertical directions and the front of a mower deck 7 is pivoted and linked. Linking members 22 are arranged between the intermediate part of the upper back of the mower deck and the links 5. When the links 5 and 5 are upward moved to a prescribed height, the upper parts of the linking members 22 and 22 are brought into contact with the machine body to lift the upper back of the mower deck.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a support device for a front mower for cutting grass, weeds, etc.

[Prior art and its problems] Conventionally, as this type of device, there is one shown in Japanese Utility Model Application Publication No. 2-55509.

The device described in this publication is configured such that a lifting frame can be moved up and down using a hydraulic cylinder, and the front upper part of a front mower is pivotally connected to the front end of the lifting frame.
The rear part of the front mower is supported by a hanging string, and the hanging string is pulled up in conjunction with the upward movement of the hanging frame to move the rear part of the mower upward.

However, such conventional devices have problems with the durability of the strings themselves, so they cannot withstand long-term use and lack practicality.

[Means for Solving the Problems] The present invention is proposed in view of the above problems, and for this purpose, the following technical measures have been taken.

That is, a pair of left and right links 5, 5 are pivotally attached to the front part of the fuselage, and this link 5.5 is configured to be rotatable in the vertical direction by an elevating mechanism 8. Between the rear upper part of the mower deck 7 and the middle part of the links 5, 5, there is a link member 22. whose lower end side is connected to the mower deck 7 and whose middle part is pivotally supported by the link 5.5. 22, and when the link 5.5 is moved upward to a predetermined height, the upper part of the link member 2122 comes into contact with the machine body and lifts the rear upper part of the mower deck 7. This is the configuration of the mounting device.

[Embodiment and its operation] An embodiment of the present invention will be described below based on the drawings.

1 is a power vehicle equipped with a large-diameter front wheel 2.2 and a small-diameter rear wheel 3.3, and the direction of the aircraft is changed by steering the rear wheel 3.3.

Two links 5.5 are provided protruding forward from both sides of the lower part of a mission case (not shown) that constitutes a part of the fuselage, and a cutting blade 6 is attached to the tip of the link 5.5. A covering mower deck 7 is pivotally connected with a pin 7a.

The link 5.5 consists of first links 5a, 5a which are pivotally connected to the fuselage, and second links 5b, 5b which are inserted into the distal ends of the first links 5a, 5a and connected with pins. . 8 is a hydraulic cylinder, one end is attached to the fuselage,
The other end is connected to the rotation base 10a of the left lift arm 10. On the tip side of the left and right lift arms 10.10,
A lift rod 12.12 having an elongated hole 11.11 is connected to the lift rod 12.12, and the first links 5a, 5a are connected to the lower end of the lift rod 12.12.

Reference numeral 15.15 is a square pipe fixed along the front and rear direction at two places on the left and right sides of the upper surface of the moadetsuki 7, and gauge pipes 16.16 are attached to the front and rear of this square pipe 15.15. Reference numeral 17.17 is a U-shaped plate in side view fixed to the upper surface of the moadetsuki at an appropriate distance from front to back. Between these plates 17.17, a plate material 19 having a long hole 18 in the front-to-back direction is inserted around the front-to-back axis. It is pivotally mounted with a pin 20 so that it can rotate.

22. 22 is a link member pivotally connected to the second links 5b, 5b, the upper part of which is cut out approximately horizontally, and the front side of the link member that is bent at 90 degrees inward with respect to the traveling direction. 2
4.24 is fixed.

25.25 is a bolt that comes into contact with the front surface of this bent piece 24.24, and is screwed into a plate 26.26 fixed to the upper surface of the second link 5b, 5b.
By changing the amount of movement of the link member 22.22, the inclination of the link member 22.22 around the fulcrum 27.27 is adjusted. Link member 22
．． A pin 30.30 attached to the lower end of the plate 22 is loosely fitted into an elongated hole 18.18 formed in the plate 19.19.

31 is a pipe installed horizontally below the step 32 of the fuselage, and when the mower deck 7 is lifted to a predetermined height, the upper parts of the link members 22 and 22 come into contact with the pipe 31, and the rear end of the mower deck 7 It is constructed so that it can be pulled upward.

The length of the bolts 25, 25 is adjusted in advance so that the lower surface of the mower deck 7 is approximately parallel to the ground when the mower deck 7 is lowered and is in the working position.

In the figure, reference numeral 35 is a steering handle, 36 and 36 are brake pedals for turning, 37 is a seat, and 38 is a gear box attached to the center of the upper surface of the mower deck 7.

In this embodiment, the pulleys and belt transmission mechanism for driving the cutting blades 6 provided on the mower deck 7 are not shown.

Next, the operation of the upper side will be explained.

The cutting blade 6 in the mower deck 7 is cut by driving the PTO shaft (not shown).
... is rotated to move the machine forward while mowing the lawn, the grass is cut to a predetermined length by the rotating cutting blades 6..., and the grass discharge lower b provided on the side of the mower deck 7- is discharged from.

When the end of the field is reached and hydraulic oil is supplied into the hydraulic cylinder 8 to extend the piston rod, the lift arm 10 rotates clockwise in FIG. 2 and lifts up the lift rod 12.12. Then, the first links 5a, 5
a moves upward around its pivot point, and the second link 5b, 5b
The moadetsuki 7 pivotally supported at the tip is lifted upward.

When Moadetsuki 7 is lifted to a predetermined height.

As shown in FIG. 4, the link members 22.22 pivotally supported by the second links 5b, 5b abut against the lower surface of the pipe 31, so that the link members 22.22 are rotated clockwise.

Then, when the first and second links 5a and 5b are rotated higher, the link members 22, 22 are rotated clockwise, and the rear end side of the mower deck 7 is pulled up significantly.

In this way, when the mower deck 7 is lifted upward, the link members 22 and 22 that support the rear part of the mower deck 7 contact the pipe 31 that forms part of the fuselage and rotate, and as a result, the rear part of the mower deck 7 becomes more It will be lifted up high.

Next, the configuration of the apparatus shown in FIG. 5 will be explained.

This device makes maintenance work easier by increasing the lifting height of the front end of the mower deck. Note that the same reference numerals are used for components that are the same as or similar to those of the above-described embodiments, and different numerals are used for components that are different.

The link 5 that supports the moadetsuki 7 consists of a first link 5a and a second link 5b, and the second link 5b on the front side is centered around a fulcrum 52 with respect to the first link 5a which is pivotally connected to the fuselage with a pin 50. It is rotatably supported.

The front upper part of the mower deck 7 is pivotally connected to the tip of the second link 5b, and the center portion of the mower deck 7 is supported at the middle portion of the second link 5b via a rod 51 that allows upward movement. Therefore, the mower deck 7 will not hang down. Then, when the hydraulic cylinder (not shown) is extended and the link 5 is moved upward, the second
The moadetsuki 7 moves upward together with the link 5b.

Reference numeral 53 denotes a dogleg-shaped arm in side view that is integrally fixed to the second link 5b, and a rod 54 of a certain length is interposed and connected between the lower part of this arm 53 and the body. 55 is a fulcrum on the body side that pivots the rod 54. In the same figure, the state shown by the solid line shows the situation when the link 5 is lowered and the work is being carried out. 51 moves upward, and Moadetsuki 7 can follow the ups and downs of the ground. When one work is completed and the mower deck 7 is lifted upward, the first link 5a and the second link 5b rotate together, raising the front end side of the mower deck 7. When the rod 54 rotates upward by a predetermined amount, the rod 54 pushes the arm 53 around the fulcrum pin 52 and rotates it counterclockwise.
is further rotated upward.

The cutting blade 6 inside the mower deck 7 is replaced once a year, but when replacing the cutting blade 6 or inspecting the inside of the mower deck 7, it is easier to lift the mower deck 7 higher, and this equipment As shown in the figure, the first link 5a and the second link 5b are bent in the middle and pivoted, and the second link 5b side is simply interposed with an inexpensive and simple intermediate interlocking member such as an arm 53 and a rod 54. This allows the lifting height to be increased.

[Effects of the Invention] As described above, in this invention, a pair of left and right links 5.5 are pivotally attached to the front part of the fuselage, and the links 5.5 are configured to be rotatable in the vertical direction by the lifting mechanism 8. The front part of the moadetsuki 7 is pivotally connected to the front end of the moadetsuki 7.
A link member 22.22 is provided between the rear upper part of the link 5.5 and the middle part of the link 5.5, the lower end side of which is connected to the mower deck 7, and the middle part of which is pivotally supported by the link 5.5.
5 is moved up a predetermined height, the link member 22.2
Since the upper part of the mower deck 7 comes into contact with the fuselage and lifts the rear upper part of the mower deck 7, the rear part of the mower deck 7 can also be lifted high when the mower deck 7 is lifted.

Furthermore, since the linking member for lifting the device uses a link or the like, it has the feature of improved durability.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is an overall side view, FIG. 2 is a perspective view of essential parts, FIGS. 3 and 4 are action explanatory views, and FIG. 5 is a side view of a comparative example. FIG. 6 is a perspective view of the main part. a b Description of symbols Power vehicle link 1st link 2nd link Mower deck lifting mechanism (hydraulic cylinder) Lift arm link member pipe

Claims (1)

[Claims] 1) A pair of left and right links 5, 5 are pivotally attached to the front part of the machine, and the links 5, 5 are configured to be rotatable in the vertical direction by an elevating mechanism 8, and the front part of the mower deck 7 is attached to the front end of the links 5, 5. together with the rear upper part of the mower deck 7 and the link 5.
, 5, there is a link member 2 whose lower end side is connected to the mower deck 7 and whose intermediate part is pivotally supported by the links 5, 5.
2, 22 are provided, and when the links 5, 5 are moved upward to a predetermined height, the upper parts of the link members 22, 22 come into contact with the machine body and lift up the rear upper part of the mower deck 7. Front mower mounting device.