JPH054809U - Work machine attachment / detachment mechanism for agricultural machinery - Google Patents

Abstract

(57) [Abstract] [Purpose] Engage / disengage the engaging member of the working machine mounting bracket with respect to the frame of the working machine by using the lift arm of the three-point link hitch type working machine mounting device of the agricultural machine. .. An engagement member of a first bracket for mounting a working machine is connected to a lift arm of a three-point link hitch type working machine mounting apparatus, and the engagement member is operated by the movement of the lift arm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a three-point link hitch type working machine mounting device provided on an agricultural machine main body and a working machine mounting bracket fixed to the agricultural machine main body separately from the three-point link hitch type working machine mounting device. The present invention relates to a mechanism for attaching and detaching a working machine in an agricultural machine equipped with.

[0002]

2. Description of the Related Art In recent years, an agricultural machine has three working machine mounting brackets fixed to the agricultural machine body separately from the known three-point link hitch type working machine mounting apparatus. Is equipped with a working machine. That is, the work machine mounting bracket is provided with a removable engagement pin shaft, and the work machine is mounted on the agricultural machine body by engaging the work machine frame with the engagement pin shaft. There is.

[0003]

[Problems to be solved by the device]

 In the conventional agricultural machine, when the work machine is attached / detached, the operation of inserting / removing the pin shaft is manually performed. However, since the weight of the working machine acts on the engaging pin shaft of the working machine mounting bracket, a large amount of labor is required for the manual insertion / removal operation, and in addition to the weight of the working machine, When a twisting force or the like is applied, it may be difficult to insert and remove the engaging pin shaft.

[0004]

[Means for Solving the Problems]

 The present invention has been made in view of the above problems, and has a three-point link hitch type working machine mounting device (2) at the front end or the rear end of the agricultural machine main body (50). Separately from the link hitch type working machine mounting device (2), a first bracket for mounting the working machine having engaging members (61) on both sides of the working machine mounting side end of the agricultural machine body (50). (52) and (52) and second brackets (53) and (53) for mounting work implements, which include engaging recesses (53b) on both sides of an intermediate portion in the front-rear direction of the agricultural machine main body (50), An agricultural machine in which the working machine (51) is connected and integrated by the first and second brackets (52), (52), (53) and (53) for mounting the working machine, wherein Attach the engaging members (61) (61) of the brackets (52) (52) of No. 1 to the three-point phosphorus. It is connected to the lift arms (12) (12) of the hitch type working machine mounting device (2), and the engaging members (61) (61) are connected to the lift arms (12) (12) of the working machine. It is a working machine attachment / detachment mechanism for agricultural machinery that is engaged with or disengaged from the frame.

[0005]

[Action]

 The working machine attachment / detachment mechanism of an agricultural machine according to the present invention uses a lift arm of a three-point link hitch type working machine mounting apparatus, and is linked to the swing motion of the lift arm to engage the working machine mounting bracket. The members are designed to engage and disengage with the frame of the work machine.

[0006]

【Example】

 1 to 6 show an embodiment of an agricultural machine to which the working machine attaching / detaching mechanism according to the present invention is applied.

In the drawings, (50) is a main body of an agricultural machine such as a tractor, (2) is a known three-point link hitch type working machine mounting device arranged at the rear of the main body of the agricultural machine (50), (52) (53) are first and second brackets for work implement mounting, which are fixed to the agricultural machine body (50) separately from the above-mentioned three-point link hitch type work implement mounting device (2), respectively (51) Is a working machine mounted on the agricultural machine body (1) by the first and second brackets (52) and (53) for mounting the working machine, and (6 ″) is a working machine attaching / detaching mechanism according to the present invention.

As shown in FIGS. 3 and 6, the three-point link hitch type working machine mounting device (2) swings vertically in a substantially central portion above the rear part of the agricultural machine body (50). A rod-shaped top link (10) that is movably arranged, and arm-shaped lower links (11) (11) that are vertically swingably arranged on both sides below the rear part of the agricultural machine body (50); The lift arms (12) and (12) arranged above the links (11) and (11) are connected to the tips of the lift arms (12) and (12) and the substantially central portion of the lower links (11) and (11). And the lift rods (13) and (13), and pin holes (14), (15) and (15) of the agricultural machine main body (50) are provided at the tips of the links (10), (11) and (11). It is formed in the axle direction.

The lift arms (12) (12) are built in the body of the agricultural machine body (50) and swing upward by a single-acting hydraulic cylinder [not shown] operated from the driver's seat. And the rocking motion is transmitted to the lower links (11) (11) via the lift rods (13) (13) to rock the lower links (11) (11) upward. Is configured to get.

1 to 5 show the present invention applied to an agricultural front loader in which a front loader is attached to the front part of an agricultural machine main body.

In the drawings, (50) shows an agricultural machine main body, and (51) shows a front loader mounted on the front part of the agricultural machine main body (50).

The agricultural machine main body (50) includes a first bracket (hereinafter referred to as a front bracket) (52) having pin holes (52a) on both front sides, and an agricultural machine main body (50). ) Is provided with a second bracket [hereinafter referred to as a rear bracket] (53) having engaging recesses (53b) with guide grooves (53a) on both sides in the longitudinal direction, while a front loader (51) is provided. Pin shafts (57) at the lower ends of both sides of the side frame (56) connecting the lift arm (54) and the lift cylinder (55) of the side arm (58) of the side frame (56) extending forward. A stand (60) having a pin hole (59) at its tip is arranged.

As shown in FIG. 3, a three-point link hitch type working machine mounting device (2) shown in FIG. 6 is arranged at the rear portion of the agricultural machine body (50). Further, as shown in FIGS. 4 and 5, a bracket (62) supporting an engaging pin shaft (61) as an engaging member is fixed to the inner surface of the front bracket (52). The tip end of the engaging pin shaft (61) is slidably fitted in the pin hole (52a) of the front bracket (52).

[0014] The lift arms (12) (12) of the three-point link hitch type working machine mounting device (2) on the rear part of the agricultural machine body (50) and the front bracket (52) of the agricultural machine body (50). The engaging pin shaft (61) is connected by a wire (63), a link mechanism (64) and a link rod (68) to form an attaching / detaching mechanism (6 ″) according to the present invention.

The wire (63) is wound around rollers (65) (66) provided on both front and rear lower sides of the agricultural machine main body (50), and a spring (69) is attached to one end of the wire (63). It is connected to the lift arms (12) and (12) through the other end, and the other end is connected to the link mechanism (64).

The link mechanism (64) includes a link arm (67) that is swingably arranged at the center of the agricultural machine body (50) on the inner side of the front bracket (52). A link rod (68) is formed which connects the lower end of the link arm (67) and the base end of the engaging pin shaft (61). The link arm (67) is tilted in the width direction of the agricultural machine body (50), and the other end of the width direction is connected to the other end of the wire (63).

The engaging pin shaft (61) is directed outward in the width direction of the agricultural machine body (50), that is, in the direction in which the tip of the engaging pin shaft (61) projects from the pin hole (52a) of the front bracket (52). Is urged by a spring [not shown].

In the above configuration, in the state shown in FIG. 1, the pin shaft (57) of the front loader (51) and the engagement recess (53b) of the rear bracket (53) are engaged with each other, and the front loader (51) is engaged. The pin hole (59) provided in the stand (60) and the engaging pin shaft (61) are fitted and engaged, and the front loader (51) is attached to the agricultural machine main body (50). To remove the front loader (51) from the agricultural machine main body (50) from this state, operate the single-acting hydraulic cylinder of the three-point link hitch type working machine mounting device (2) from the driver's seat of the agricultural machine main body (50). Then, the lift arms (12) (12) are swung upward. Then, the wire (63) is pulled through the coil spring (69) by the swing of the lift arm (12), and the link arm (67) is rotated counterclockwise in FIG.

By the rotation of the link arm (67), the engaging pin shaft (61) is pulled by the link rod (68), and the tip end portion of the engaging pin shaft (61) is moved to the front bracket ( Since it retreats toward the pin hole (52a) of 52), the engagement state with the pin hole (59) of the stand (60) of the front loader (51) is released.

After that, when the piston rod (55 ′) of the lift cylinder (55) is operated by hydraulic pressure and the agricultural machine body (50) is retracted, the pin shaft (57) of the front loader (51) is moved. It disengages from the rear bracket (53) through the engaging recess (53b) and the guide groove (53a), and thus the front loader (51) is detached from the agricultural machine body (50).

In the above embodiment, the front loader (51) may be attached to the agricultural machine main body (50) in the reverse order of the above. In this case, the engaging pin shaft (61) is lifted. As the arms (12) (12) naturally descend, they are projected from the front bracket (52) by the urging force of a spring [not shown] and are fitted into the pin holes (59) of the front loader (51).

Further, in the above-described embodiment, in addition to the wire (63), a wire pulled by the downward movement of the lift arms (12) (12) is provided with a lift arm (12) (12) and a link arm (67). ) And the spring can be omitted.

In the above embodiment, the upper end of the link arm (67) is attached so as to be tilted inward in the width direction of the agricultural machine main body (50), and the lift arms (12) and (12) are rocked downward to engage. The combined pin shaft (61) may be projected from the pin hole (52a) of the front bracket (52) and inserted into the pin hole (59) of the front loader (51).

In the above description, all the engaging members such as the engaging pin shafts are connected to the lift arm, and are engaged / disengaged with respect to the frame of the working machine in conjunction with the swing motion of the lift arm. However, in the present invention, the engagement member is not limited to the lift arm, and the engagement member may be connected to a lift rod or a lower link that is vertically moved by the lift arm.

[0025]

[Effect of the device]

 As described above, the working machine attaching / detaching mechanism of the agricultural machine according to the present invention uses the lift arm of the three-point hitch type working machine mounting device, and the working machine mounting mechanism is linked with the swing motion of the lift arm. Since the engaging member of the first bracket for use is engaged with and disengaged from the frame of the working machine, it is not necessary to manually engage and disengage the engaging member with respect to the frame of the working machine. It is extremely practical because the worker can engage and disengage the lift arm from the driver's seat of the agricultural machine by hydraulically operating it. Moreover, the mechanism of the present invention is a conventional 3-point link hitch type work. Since it uses the left arm of the machine mounting device, it can be carried out extremely inexpensively without using a special power unit.

[Brief description of drawings]

FIG. 1 is a side view showing an agricultural front loader to which the present invention is applied.

FIG. 2 is a side view showing a separated state of the agricultural machine body and the front loader.

FIG. 3 is a side view showing a schematic structure of a working machine attaching / detaching mechanism according to the present invention.

FIG. 4 is a plan view of the main part of FIG.

5 is a perspective view of the main part of FIG.

FIG. 6 is an enlarged perspective view of an essential part showing a three-point link hitch type working machine mounting device.

[Explanation of symbols]

2 3-point link hitch type working machine mounting device 12 Lift arm 50 Agricultural machine body 51 Front loader [Working machine] 52 Front bracket [First bracket for mounting working machine] 53 Rear bracket [Second for mounting working machine] Bracket] 56 side frame 61 engaging pin shaft [engaging member]

Claims (1)

[Claims for utility model registration] 1. A front end portion or a rear end portion of the agricultural machine main body has a three-point link hitch type working machine mounting device, and the above three-point link hitch type working machine mounting device. Separately, on both sides of the working machine mounting side end portion of the agricultural machine main body, a first bracket for mounting the working machine equipped with an engaging member, and engaging recesses on both sides of an intermediate portion in the front-rear direction of the agricultural machine main body In the agricultural machine having a second bracket for mounting the working machine, the working machine is connected and integrated by the first and second brackets for mounting the working machine, the first bracket for mounting the working machine is 3 engaging members
It is characterized in that it is adapted to be connected to a lift arm of a point-link hitch type working machine mounting device and to engage or disengage the engaging member with respect to the frame of the working machine in conjunction with the lift arm. Working machine attachment / detachment mechanism for agricultural machinery.