JPH0316406Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a structure for preventing side vibration of a working machine attached to the rear or front part of an agricultural machine body such as a tractor.

Conventional technology Conventionally, working equipment for agricultural machinery is generally attached to the main body of the agricultural machine such as a tractor using a three-point link hitch type mounting mechanism installed at the rear or front of the main body of the agricultural machine. It was spot on.

The above three-point link hitch type mounting mechanism consists of a top link at the upper center and two lower links on both sides of the lower part, and the lower links are given only upward swinging motion by a single-acting hydraulic cylinder. It is configured as follows. Therefore, when a work machine such as a bucket loader that needs to exert a downward force is attached to the three-point link hitch type attachment mechanism, when the bucket loader is operated in the downward direction, the lower link will move upward. As a result of the rocking, the entire bucket loader moves upward, making it impossible to cause the bucket loader to exert sufficient downward force.

Therefore, in recent years, a predetermined number of mounting members are fixedly installed on the main body of the agricultural machine, separately from the above-mentioned three-point link hitch type mounting mechanism, and using these mounting members, working machines such as the above-mentioned bucket loader are mounted on the main body of the agricultural machine. was.

Problems that the invention aims to solve As mentioned above, when using a working machine such as a bucket loader,
When mounted using a mounting member fixed to the main body of the agricultural machine, the frame of the working machine becomes fixed to the main body of the agricultural machine, so that the bucket loader can exert a downward force.

However, in this case, the work machine may shake in the horizontal direction with respect to the agricultural machine body, so-called lateral vibration, and in order to prevent this lateral vibration, it is necessary to increase the strength of the mounting member. This resulted in an increase in the size and weight of the mounting components. In addition, some of the above-mentioned work machines are equipped with parts such as frame connectors and stays for preventing lateral run-out to prevent the above-mentioned lateral run-out. This has caused inconveniences such as inconvenience in installation and an increase in the number of parts.

Means for Solving the Problems The present invention includes a swingable top link, two lower links to which swinging force is applied only upward, and a link provided between the lower link and the main body of the agricultural machine. A three-point link hit type work equipment mounting mechanism comprising a check chain that pulls each of the lower links outward, and a work equipment mounting mechanism fixedly installed separately from the three-point link hit type mounting mechanism. In an agricultural machine in which a work implement is attached to the machine body by the above-mentioned work implement attachment mechanism,
A horizontal working machine for an agricultural machine in which an engaging member for integrally connecting the lower link and the frame of the working machine is disposed on the lower link of the three-point link hit type working machine mounting mechanism or on the frame of the working machine. It has a shake prevention structure.

Function: The lateral shake prevention structure for the working machine of agricultural machinery according to the present invention includes a frame of the working machine attached to the main body of the agricultural machine by a working machine mounting mechanism that is separate from the three-point link hitch type mounting mechanism, and the above-mentioned three. It is constructed by integrally connecting the lower links of the point link hit type attachment mechanism with an engaging member, and pulling the two lower links outward using a check chain.

Embodiment FIGS. 1 to 6 show an agricultural machine to which the structure for preventing lateral vibration of a working machine according to the present invention is applied.

In the drawings, 1 is a main body of an agricultural machine such as a tractor, A is a known three-point link hitch-type attachment mechanism disposed at the rear of the agricultural machine main body 1, and B is a separate three-point link hitch-type attachment mechanism A. To,
Work machine mounting mechanism arranged on the agricultural machine body 1, C
is attached to the agricultural machine main body 1 by the above-mentioned work machine mounting mechanism B.
This figure shows the work equipment installed on the machine.

As shown in FIG. 5, the three-point link hitch type mounting mechanism A includes a rod-shaped top link 10 that is swingably disposed approximately at the upper center of the rear of the agricultural machine main body 1, and a rear part of the agricultural machine main body 1. Arm-shaped lower links 11, 1 swingably arranged on both sides of the lower part
1, lift arms 12, 12 disposed above the lower links 11, 11, and tips of the lift arms 12, 12 and the lower links 11, 1.
Lift rod 13, which connects the substantially central portion of 1.
3 and check chains 14, 14 disposed between the center portion of each of the lower links 11, 11 near the base end and the agricultural machine body 1; Pin holes 15, 16, 16 are formed in the agricultural machine body 1 in the vehicle width direction.

The lift arms 12, 12 are given only an upward swinging motion by a single-acting hydraulic cylinder (not shown) built into the body of the agricultural machine main body 1, and this swinging motion is performed by the lift rod 13. ,13
The signal is transmitted to the lower links 11, 11 via the lower links 11, 11, and the lower links 11, 11 are configured to be able to swing upward.

Turnbuckles 17, 17 are disposed in the middle of the check chains 14, 14, respectively.
The turnbuckles 17, 17 can be tightened or loosened to tighten the check chain 1.
4, 14, the lower links 11,
11 in the width direction and adjust the width between the tips of the left and right lower links 11, 11.

The mounting mechanism B includes an upper mounting member 20 attached to the upper rear part of the agricultural machine main body 1 at the approximate center thereof;
As shown in FIG. 6, the lower mounting member 21 and the upper mounting member 20 attached to the rear lower part of the agricultural machine main body 1 are box-shaped members with an open rear part, and on both inside sides, there are holes diagonally downward. Approximately U-shaped grooves 22, 22 having openings are formed.
The upper and lower surfaces of 2 and 22 are used as guide surfaces 23a and 23b. Further, the grooves 22, 2 of the upper mounting member 20
Horizontal pin holes 24, 24 are formed in the inner part of 2.

The lower mounting member 21 is formed along the front-rear direction of the agricultural machine main body 1, and has an opening 25 at the lower rear edge.
A guide groove 25 having a diameter a is formed, and furthermore, a locking groove 26 is formed on the back side of the guide groove 25, extending obliquely upward from the guide groove 25.

In this embodiment, the working equipment C is a bucket loader, and this bucket loader C includes a vertical frame 30 and a vertical frame 30.
Main arm 3 swingably disposed at the upper end of 0
1 and a bucket 32 swingably disposed at the tip of the main arm 31, and arm-shaped brackets 33 and 34 are fixed to the front edge of the vertical frame 30 as engagement members with the mounting mechanism B. has been done.

Among the arm-shaped brackets 33 and 34, the upper arm-shaped bracket 33 located at the upper part of the vertical frame 30 has a boss part 36 formed at the tip thereof with a pin hole 35 bored in the center, and a boss part 36 located at the lower part. At the tip of the lower arm-shaped bracket 34,
A pin-like protrusion 37 is installed horizontally.

Furthermore, the vertical frame 3 of the bucket loader C
0, the lower link 11,
a hook-like engagement member 38 that engages with the tip of 11;
38 is fixed.

In the above configuration, in order to attach the bucket loader C to the agricultural machine body, first, as shown in FIG.
This lower link 11,
11 is engaged with the hook-like engaging members 38, 38 of the vertical frame 30.

Next, as shown in FIG. 2, a single-acting hydraulic cylinder (not shown) is operated, and the lift arm 12,
12. When the lower links 11, 11 are swung upward via the lift rods 13, 13, the vertical frame 30 of the bucket loader C is lifted with the tip bucket 32 in contact with the ground, and the lower mounting member 21 , 21, the pin-shaped protrusion 37 at the tip of the lower arm-shaped bracket 34 comes into contact with the rear end side of the upper edge of the guide groove 25 of the lower arm-shaped bracket 34.

Next, as shown in FIG. 3, when the lower links 11, 11 are further swung upward, the pin-shaped protrusion 37 of the lower arm-shaped bracket 34
is directed forward in the guide groove 25, that is,
While sliding toward the locking groove 26 side, the upper arm-shaped bracket 33 is attached to the upper mounting member 20.
The vehicle approaches the guide surfaces 23a and 23b of the vehicle.

The pin-shaped protrusion 37 of the lower arm-shaped bracket 34 slides forward in the guide groove 25 of the lower mounting member 21 as the lower links 11, 11 swing upward, and then slides into the locking groove 26. while the upper arm-shaped bracket 33
The boss portion 36 at the tip fits into the recesses 22, 22 of the upper mounting member 20 and guides the guide surfaces 23a, 2.
3b, the fourth
As shown in the figure, the pin hole 2 of the upper mounting member 20
4 and 24 are aligned with the pin hole 35 at the tip of the upper arm-shaped bracket 33.

After that, the pin hole 24 of the upper mounting member 20,
24 and the pin hole 35 at the tip of the upper arm-shaped bracket 33 to connect the upper mounting member 20 and the upper arm-shaped bracket 33 with a pin.

Above lower links 11, 11 and vertical frame 3
0 by the hook-like engaging members 38, 38, each of the lower links 11, 11,
As mentioned above, the check chains 14, 14 regulate the width between the tips and prevent the swinging, so they function as supporting members for preventing the bucket loader C from lateral swinging, and the agricultural machinery of the bucket loader C is To prevent lateral vibration relative to the main body 1. In this state, the pin-shaped protrusion 37 of the lower arm-shaped bracket 34 of the bucket loader C is engaged with the locking groove 26 of the lower mounting member 21, and the upper arm-shaped bracket 33 of the bucket loader C and the upper mounting member are engaged with each other. 20 by a pin shaft 39, the vertical frame 30 of the bucket loader C is securely attached and fixed to the agricultural machine body 1. Therefore, like the bucket loader C, the bucket loader 32, etc. In the case of working equipment that requires downward pressure on the tip working member, the frame of the working equipment is fixed to the main body 1 of the agricultural machine. It becomes possible to pressurize.

Incidentally, when removing the bucket loader C from the agricultural machine main body 1, the procedure may be reversed to that described above.

FIG. 7 shows another embodiment of the working machine in the above embodiment, in which the working machine C' is used as a loading platform for transporting agricultural products and the like.

In the above-mentioned transport platform C', the present invention is applied for the purpose of preventing damage to the mounting members 20, 21, arm-shaped brackets 33, 34, etc. due to lateral vibration occurring during transport.

8 and 9 show other embodiments of the present invention, and the same constituent members as in FIGS. 1 to 6 are given the same reference numerals and reference numerals, and their explanations are omitted. do.

In the drawings, B' and C'' indicate a different type of working machine mounting mechanism and bucket loader from the above-described embodiments, and 40 indicates an engaging member disposed between the tips of the lower links 11, 11.

The mounting mechanism B' includes an upper mounting member 51 fixedly installed above the rear part of the agricultural machine body 1 and having a U-shaped receiver 50, and a lower mounting member 52 fixedly installed below the rear part and formed in a hook shape. It is made up of.

The bucket loader C'' includes a frame 55 having a substantially horizontal T-shape, which has a cylindrical body 53 fixed to the upper part and a horizontal shaft 54 fixed to the lower part, and an upper part pivotably pivoted to the upper end of the frame 55. a link 56, a lower link 57 pivotably attached to the tip of the frame 55, and an inverted L-shaped lift arm 58 with its base end pivotably attached to the tip of the lower link 57.
and an intermediate support 60 fixed to the bent part of the lift arm 58, to which the tip of the upper link 56 is pivotably pivoted, and the base end of the dump cylinder 59 is pivotably pivoted; The above frame 55
a lift cylinder 61 having one end pivotally attached to the lower part of the lift cylinder 61 and the other end pivotally attached near the pivot joint between the lower link 57 and the lift arm 58; dump cylinder 59
and a bucket 63 to which the driving force of is transmitted via a link mechanism 62.

The bucket loader C'' has the horizontal shaft 54 hooked onto the lower mounting member 52, the cylindrical body 53 fitted into the U-shaped receiver 50, and the cylindrical body 53 and the pin holes in both side walls of the upper mounting member 51 connected to each other. It is attached to the agricultural machine main body 1 by inserting the locking pin 64 into the agricultural machine main body 1.

The engagement member 40 is connected to the bucket loader.
The lower links 11, 1 of the three-point link hitch type mounting mechanism A are connected to the tips of the supporting members 65, 65, which have a substantially U-shaped cross-sectional shape with dimensions that allow the C'' frame 55 to fit inside.
It is disposed by fitting into the pin holes 16, 16 at the tips of the parts 1 and 1.

In the above embodiment, after the bucket loader C'' is mounted on the agricultural machine body 1, the lower links 11, 11 are swung upward via the lift arms 12, 12 and lift rods 13, 13 by a single-acting hydraulic cylinder. , the engagement member 40 at the tip of the lower links 11, 11 is attached to the frame 5 of the bucket loader C''.
5 and engages the lower links 11, 11 with the frame 55, the bucket loader is assembled as described above.
C″ lateral vibration prevention structure is formed.

The above explanation is for an agricultural machine body with a 3-point link hitch-type attachment mechanism installed at the rear, but it also applies to an agricultural machine body with a 3-point link hitch-type attachment mechanism installed at the front. However, it can be fully applied.

Effects of the Invention As explained above, the lateral vibration prevention structure of the working machine of agricultural machinery according to the present invention is a work machine that is attached to the main body of the agricultural machine by a working machine attachment mechanism that is separate from the three-point link hitch type attachment mechanism. The frame of the machine and the lower link of the three-point link hitch type mounting mechanism are integrally connected by an engaging member, and each of the two lower links is pulled outward by a check chain. , can effectively prevent horizontal vibration of the working machine relative to the agricultural machine body,
In addition, this makes it possible to omit parts such as steady rest stays and frame connectors, and also to reduce the strength of the component of the agricultural machine attachment mechanism, which is separate from the three-point link hitch type attachment mechanism. It can be made smaller and lighter.

Furthermore, the lateral vibration prevention structure of the working machine of agricultural machinery according to the present invention utilizes the existing three-point link hitch type mounting mechanism and makes minor modifications to the three-point link hitch type mounting mechanism or the frame of the working machine. Since it can be implemented, it can be implemented at extremely low cost despite having the above-mentioned effects.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the lateral vibration structure of a working machine for agricultural machinery according to the present invention, and Figures 1 to 4 show a structure that is separate from the three-point link hitch type attachment mechanism. A schematic side view for explaining how to attach the work implement to the main body of the agricultural machine using the work implement attachment mechanism, FIG. 5 is a perspective view including an enlarged view of the main parts showing the three-point link hitch type attachment mechanism, and FIG. 6 is the upper part. FIG. 3 is an enlarged perspective view of the mounting member. FIG. 7 is a schematic side view showing another embodiment of the working machine according to the embodiment shown in FIGS. 1 to 6, and FIGS. 8 and 9 show other embodiments of the present invention. FIG. 8 is a schematic side view, and FIG. 9 is a front view of the engaging member. A...3-point link hitch type [work equipment] attachment mechanism, B, B'...work equipment attachment mechanism separate from the 3-point link hitch type attachment mechanism, C, C''...bucket loader [work equipment], C'... …Transportation platform [work equipment],
1... Agricultural machinery body, 10... Top link, 1
1, 11... Lower link, 14, 14... Check chain, 30, 55... Frame of work machine,
38, 38, 40...Engagement member.

Claims (1)

[Scope of utility model registration request] A swingable top link, two lower links to which swinging force is applied only upwards, and a link disposed between the lower link and the main body of the agricultural machine to pull each of the lower links outward. The above-mentioned work equipment mounting mechanism can be attached to an agricultural machine body that is equipped with a three-point link hitch type work equipment mounting mechanism composed of a check chain and a work equipment mounting mechanism that is fixedly installed separately from the three-point link hitch type mounting mechanism. In an agricultural machine equipped with a working machine, an engaging member is disposed on the lower link of the three-point link hitch type working machine mounting mechanism or on the frame of the working machine to integrally connect the lower link and the frame of the working machine. A horizontal vibration prevention structure for working machines of agricultural machinery.