JP3510233B2 - Connecting shaft for agricultural work machine and agricultural work machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting shaft for agricultural work machines and an agricultural work machine capable of reducing noise.

[0002]

2. Description of the Related Art Conventionally, for example, a cultivating body such as a rotary for cultivating work while rotating in a predetermined direction, and a first leveling ground such as a flat plate rotatably arranged in a vertical direction at a rear position of the cultivating body. There is known an agricultural working machine such as a scraping halo having a body and a second grounding body such as a rake plate that is rotatably connected to the first grounding body through a connecting pin in the left-right direction in the vertical direction. ing.

[0003]

However, in the above-mentioned conventional agricultural working machine, a pin through hole which is slightly larger than the connecting pin so that the connecting pin can be easily passed through is provided in the first leveling body and the second leveling body. Since the opening is formed in the back wall, rattling occurs and noise tends to occur. Especially recently
In the field of agricultural work machines as well, there is a strong demand for noise reduction.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a connecting shaft for an agricultural work machine and an agricultural work machine capable of reducing noise.

[0005]

A connecting shaft for an agricultural working machine according to claim 1 is a connecting shaft for an agricultural working machine for rotatably connecting the connecting body to the connected body, the connecting shaft being connected. A connecting shaft body that is loosely inserted in the opening of the body and the opening of the connecting body and has a deformed portion on the outer peripheral side, and the gap between the connecting shaft body and the peripheral edge portion of the opening of the connected body and the connection. A gap filling means for deforming the deformed portion of the connecting shaft body is provided so that a gap between the shaft body and the peripheral portion of the opening of the connecting body is filled.

By deforming the deformed portion of the connecting shaft body by the gap filling means, the gap between the peripheral portion of the opening of the connecting shaft body and the connected body and the peripheral edge of the opening of the connecting shaft body and the connecting body. Since the gap between the parts can be filled, rattling can be suppressed and noise can be reduced.

A connecting shaft for an agricultural work machine according to a second aspect of the present invention is a connecting shaft for an agricultural work machine for rotatably connecting the connected body to the connected body, the opening of the connected body and the connecting shaft. A substantially columnar shaft body loosely inserted into the opening of the connecting body, and fitted on the outer peripheral side of this shaft body, and in a state before deformation, the outer diameter is smaller than the inner diameter of the peripheral portion of each opening. Is attached to the outer peripheral side of the shaft body so as to be pressed against the end face of the deformable body, the deformable body is deformed, and the outer peripheral side of the deformable body is attached to each of the openings. And an attachment body that is brought into close contact with the peripheral portion.

Since the deformable body can be deformed by the attaching body and the outer peripheral side of the deformable body can be brought into close contact with the peripheral portions of the respective openings of the connected body and the connected body, the occurrence of rattling is suppressed. The noise is reduced.

According to a third aspect of the present invention, there is provided a connecting shaft for an agricultural work machine according to the second aspect, wherein the deformable body is
The elastic member is elastically deformable.

Further, since the deformable body is composed of an elastic member which can be elastically deformed, the occurrence of rattling is appropriately suppressed, and further noise reduction is achieved.

According to a fourth aspect of the present invention, there is provided a connecting shaft for an agricultural work machine according to the second or third aspect, wherein the attachment body is a screw fastener that is screwed to the outer peripheral side of the shaft body. However, the deformed state of the deformable body is appropriately maintained by the screwing tool screwed to the outer peripheral side of the shaft body.

The agricultural working machine according to claim 5 has a connecting shaft for the agricultural working machine according to any one of claims 1 to 4, which has an axial direction in the left-right direction, and a cultivating body for performing plowing work while rotating in a predetermined direction. And a first ground leveling body that is a body to be grounded, which is rotatably arranged in the vertical direction at a rear position of the cultivated body, and that is connected to the first ground leveling body through the connecting shaft in the vertical direction. And a second ground leveling body that is rotatably connected to the ground leveling body and is a connection body for ground leveling work.

Further, rattling is suppressed when the plowing work is carried out with the tilled body and the grounding work is carried out with the first ground leveling body and the second ground leveling body, and the noise is reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A configuration of an embodiment of an agricultural working machine of the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4, reference numeral 1 is an agricultural work machine, and the agricultural work machine 1 is a towing type scraping harrow or the like mounted on a rear portion of a tractor (not shown) which is a towing vehicle as a traveling vehicle. While moving the field forward (X direction in the figure) by pulling the tractor, cultivating work, leveling work,
It is for carrying out soil work such as soil gathering work.

This agricultural working machine 1 is provided with a machine frame 3 having a tractor connecting portion 2 which is, for example, a three-point connecting portion, and this machine frame 3 comprises a universal joint, a transmission shaft and the like on the PTO shaft of the tractor. An input shaft 4 in the front-rear direction, which is connected via a connecting means (not shown), is rotatably provided.

Further, the machine frame 3 is rotatably provided with a cultivating body 6 such as a rotary for performing a cultivating work while drivingly rotating the motive power from the input shaft 4 in a predetermined direction. The cultivating body 6 has a left and right cultivating shaft 7, and a plurality of cultivating claws 8 are radially attached to the cultivating shaft 7.

Further, the machine frame 3 has a tilling claw 8 of a tilling body 6.
A cover body 9 is fixedly provided to prevent scattering of the soil that is flipped up by, and the cover body 9 is arranged above the tiller body 6.

At the rear end portion of the cover body 9, the front end portion (upper end portion) of the first ground leveling body 11, which is a connected body such as a substantially rectangular plate-like flat plate for ground leveling work, is provided with rubber. Made of elastic plate 10
The first leveling body 11 is arranged at a rear position of the tiller 6 so as to be rotatable at least in the vertical direction.

At the rear end portion (lower end portion) of the first leveling body 11, a connecting body such as a rake plate having a substantially rectangular plate shape for performing leveling work subsequent to the first leveling body 11 is provided. The front end portion of the ground leveling body 2 of 2 is rotatably connected via a pair of left and right connecting pins (not shown) and a connecting shaft (hereinafter referred to as a connecting shaft) 14 for the agricultural working machine at the center in the left-right direction. There is.

That is, as also shown in FIGS. 1 and 2, at the rear end portion of the first ground leveling body 11, the second ground leveling body 12 has an axial direction in the left-right direction coaxial with each other. The second ground leveling body 12 is rotatably connected in a vertical direction via a connecting shaft 14 and a connecting pin, and the second ground leveling body 12 is located at a rear position of the tillage body 6 in a vertical direction about the horizontal connecting shaft 14 and the connecting pin. It is rotatably arranged.

The first leveling body 11 has a main body plate portion 21 having a longitudinal shape having a longitudinal direction in the left-right direction and bent at a plurality of points along the longitudinal direction. A projecting plate part that is a connecting plate part from the central part in the longitudinal direction of 21.
22 is projected integrally upward. This protruding plate part 22
A substantially circular opening 23 is formed at the rear end portion.
The opening 23 includes an opening 23a, which is a space, and a substantially annular peripheral portion 2 located along the outer periphery of the opening 23a.
It is composed of 3b and.

The second ground leveling body 12 has a longitudinal main body portion 26 having a longitudinal direction in the left-right direction and bent at a plurality of locations along the longitudinal direction. From the central portion in the longitudinal direction of the main body plate portion 26, the protruding plate portions, which are a pair of left and right connecting plate portions, which are slightly thinner than the protruding plate portion 22 of the first ground grading body 11 and are spaced apart and opposed to each other by a predetermined distance, that is, The first protruding plate portion 27 on the left side in the direction of travel and the second protruding plate portion 27 on the right side in the travel direction
The protruding plate portion 28 integrally protrudes upward.

A substantially circular opening 31 having the same diameter as the opening 23 of the projecting plate 22 is formed at the front end of the first projecting plate 27. The opening 31 is an opening 31a that is a space.
And a substantially annular peripheral edge portion 31b located along the outer periphery of the opening portion 31a.

On the other hand, at the front end of the second projecting plate portion 28, there is formed a fitting opening 32 which is a substantially circular fixing part having a smaller diameter than the opening 23 of the projecting plate portion 22. This mating opening 32
Is composed of an opening portion 32a which is a space portion and a substantially annular peripheral edge portion 32b which is located along the outer periphery of the opening portion 32a.

At the rear end portions of both projecting plate portions 27, 28, the second ground leveling body 12 is operated by operating the operation lever 33 to the leveling work state (rotatable state) and the earth gathering work state (unrotatable state). The lower end of the connecting rod 35 of the operation switching mechanism 34 that can be switched to a different state) is connected. A grip 36, which is an operation grip for gripping the second ground leveling body 12 in a maintenance state by manual rotation, is attached to the rear end portions of both projecting plate portions 27 and 28.

Here, the first leveled body 11 and the second leveled body 12 are
As shown in FIG. 1, the left and right connecting shafts 14 for rotatably connecting the two are connected to the openings of the projecting plate portion 22 of the first ground leveling body 11.
The opening portion 23a of 23 and the first protruding plate portion 2 of the second leveling body 12
The shaft body 41 has a substantially columnar shape and is loosely inserted into the opening portion 31a of the opening portion 31 of 7 and fixed to the peripheral edge portion 32b of the fitting opening portion 32 of the second projecting plate portion 28.

On the outer peripheral side of the axial center portion of the shaft body 41, in the state before deformation, the outer diameter is equal throughout the entire axial length, and the outer diameter is the inner diameter of the peripheral edge portions 23b and 31b of the openings 23 and 31, respectively. A deformable body 42, which is a deformable tubular body having a substantially cylindrical shape in a smaller state, is fitted in a state of being positioned by a positioning large diameter shaft portion 44 which is a positioning portion. The deformable body 42 is composed of an elastic member 43 that is elastically deformable and is integrally formed of rubber or synthetic resin into a substantially cylindrical shape.

On the outer peripheral side of the shaft 41 on the one axial side (the left side in the advancing direction), the deformable body 42 is compressed and elastically deformed in the axial direction to increase the outer diameter of the deformable body 42. The two nuts (double nuts) 45, which constitute a screwing tool that is an attachment body for closely adhering the two to the two peripheral edge portions 23b and 31b of the openings 23 and 31, respectively, are pressed against one end surface of the deformable body 42. It is attached, for example, screwed.

On the other hand, the second projecting plate portion 28 of the second ground leveling body 12 is provided on the outer peripheral side of the shaft body 41 on the other end side in the axial direction (on the right end side in the traveling direction).
One fixing nut 46 that constitutes a fixing screw attachment tool that is a fixing attachment body for integrally fixing the shaft body 41 to the
Is the second protruding plate portion together with the large diameter positioning shaft portion 44 of the shaft body 41.
The peripheral edge portion 32b of 28 and the washer 47 are attached, for example, screwed so as to sandwich the washer 47 from both sides.

The shaft 41 is made of, for example, metal and integrally formed into a solid substantially cylindrical shape, and has a round shaft-shaped shaft portion 51 to which the deformable body 42 is fitted on the outer peripheral side. The outer peripheral surface of the shaft portion 51 is formed in a cylindrical surface shape. At one end of this shaft 51,
A first screw shaft portion 53 having a thread groove 52 formed on the outer peripheral surface is integrally provided. Then, the thread groove of the first screw shaft portion 53
Two nuts 45 are respectively screwed onto 52.

A round shaft-shaped large-diameter shaft portion 44 having an outer diameter larger than that of the shaft portion 51 is integrally provided at the other end of the shaft portion 51. It is in contact with the protruding plate portion 28. The outer diameter of the positioning diameter large shaft portion 44 is
The diameter is slightly smaller than the inner diameter of the peripheral portion 23b of the opening 23, and is set to a value substantially equal to the outer diameter of the deformable body 42 in a state before deformation.

Further, a round shaft-like fitting shaft portion 55 having an outer diameter smaller than that of the large diameter positioning shaft portion 44 is integrally formed at the end portion of the large diameter positioning shaft portion 44 on the second projecting plate portion 28 side. The fitting shaft portion 55 is provided and fits into the fitting opening portion 32 of the second projecting plate portion 28.

A second screw shaft portion 57 having a thread groove 56 formed on the outer peripheral surface is integrally provided at the end of the fitting shaft portion 55. Then, the fixing nut 46 is screwed into the thread groove 56 of the second screw shaft portion 57, and the screwed fixing nut is screwed.
The peripheral edge portion 32b of the second projecting plate portion 28 and the washer 47 are firmly sandwiched by the 46 and the large-diameter positioning shaft portion 44. Further, fixing holes 58 of a depth adjusting mechanism for making the depth of the tiller 6 constant are formed at both ends of the shaft body 41.

The shaft body 41 and the deformable body 42 fitted on the outer peripheral side of the shaft body 41 are spaced apart from each other by the openings 23,
A connecting shaft main body 61 that can be loosely inserted into 31 is configured.
The connecting shaft main body 61 has a deformable deformable portion 62 formed of the deformable body 42 on the outer peripheral side in the axial center portion. Further, a gap 63 between the connecting shaft body 61 and the peripheral edge portion 23b of the opening 23 of the first ground leveling body 11 and a gap between the connecting shaft body 61 and the peripheral edge portion 31b of the opening portion 31 of the second leveling body 12. 64
The gap filling means 65 for deforming the deforming portion 62 of the connecting shaft body 61 is configured by the two nuts 45 so that

Next, the operation and the like of the above embodiment will be described.

Using the connecting shaft 14, the first leveling body 11 and the second leveling body 11
In the case of rotatably connecting the ground leveling body 12 of FIG. It is fitted on the outer peripheral side of the shaft body 41 so as to be located over a part of the outer peripheral surface of the screw shaft portion 53.

Next, the shaft body 4 in which the deformable body 42 is fitted
1, that is, the connecting shaft main body 61 is moved along the axial direction of the connecting shaft main body 61 until the positioning large-diameter shaft portion 44 comes into contact with the second projecting plate portion 28. When the connection shaft body 61 is inserted into the openings 23, 31, 32, the connecting shaft main body 61 of the opening 23 of the protruding plate portion 22 of the first ground leveling body 11 and the first protruding plate portion 27 of the second ground leveling body 12 is inserted. A gap 63 in the opening 31
It is loosely inserted via 64 and fitted into the fitting opening 32 of the second projecting plate portion 28 of the second ground leveling body 12.

This connecting shaft body 61 is inserted by the deformable body 42.
Outer diameter and positioning diameter of the large shaft portion 44 is the opening 23, 31
Since it is smaller than the inner diameters of the peripheral edge portions 23b and 31b, it can be easily performed.

Then, after the washer 47 is fitted on the outer peripheral side of the second screw shaft portion 57 of the shaft body 41 of the connecting shaft body 61, the fixing nut 46 is screwed on the outer peripheral side of the second screw shaft portion 57. Screw on. Then, as shown in FIG. 1, the fixing nut 46 and the shaft body
The peripheral diameter portion 32b of the second projecting plate portion 28 and the washer 47 are clamped and clamped by the positioning large diameter shaft portion 44 of 41, and the shaft body 41 is fixed to the second projecting plate portion 28.

Next, on the outer peripheral side of the first screw shaft portion 53 of the fixed shaft body 41, two nuts serving as gap filling means 65 are provided.
Screw 45 in order and screw in. At this time, the first nut
When 45 is pressed against the end face of the deformable body 42 and brought into pressure contact therewith, as shown in FIG. 2, the deformable body 42 is pressed by the nut 45 and is compressed and elastically deformed in the axial direction so that the wall thickness of the deformable body 42 is reduced. It becomes thicker and the outer peripheral surface side bulges so as to escape in the outer diameter direction, and the outer diameter of the deformable body 42 increases. As a result, the outer peripheral side of the deformable body 42 becomes the first leveled body 11 and the second leveled body 12 Each opening
The two peripheral portions 23b and 31b of 23 and 31 are in close contact with each other.

Due to the elastic deformation of the deformable body 42, the peripheral portion 23 of the opening 23 of the connecting shaft main body 61 and the first leveling body 11 is deformed by the elastically deformed deformable body 42.
A gap 63 between b and a gap 64 between the connecting shaft main body 61 and the peripheral edge portion 31b of the opening 31 of the second leveling body 12 are filled. The second leveling body 12 is rotatably connected to the first leveling body 11 by such assembling work. Two nuts
When 45 is loosened, the deformable body 42 returns to its original shape with a restoring force based on elasticity, so that the connecting shaft body 61 can be easily removed.

When a desired soil work is carried out by using the agricultural work machine 1 mounted on the tractor, when the agricultural work machine 1 is moved by pulling the tractor, the cultivating body 6 carries out the plowing work. Ground leveling work is performed by the ground leveling body 11 and the second ground leveling body 12. As a result, the soil in the field is cultivated and flattened in a horizontal plane. At this time, the second leveling body 12 is
The connecting shaft 14 is connected to the first leveling body 11 according to the unevenness of the field.
It rotates together with. That is, by sliding the outer peripheral surface of the deformable body 42 of the connecting shaft 14 with respect to the inner peripheral surface of the peripheral edge portion 23b of the projecting plate portion 22 of the first leveled body 11, the second leveled body 12 becomes the first leveled surface. It rotates with the connecting shaft 14 with respect to the body 11.

As described above, according to the above-described embodiment, the deformable body 42 is deformed by the two nuts 45 constituting the screw fitting so that the outer diameter increases, and the outer periphery of the deformable body 42 is increased. The sides are the peripheral portions 23 of the first leveling body 11 and the second leveling body 12, respectively.
Since it can be closely attached to b and 31b, not only the assembling work is easy, but also rattling at the time of soil work can be suppressed and the noise can be reduced. That is, for example, rattling does not occur at the connecting portion between the first leveling body 11 and the second leveling body 12, and soundproofing during soil work,
The vibration damping effect can be enhanced.

Further, since the screw-fastening tool screwed to the outer peripheral side of the shaft body 41 is composed of the two nuts 45, the nut 45 does not become loose and the deformable body 42 has a large diameter. That is, it is possible to properly maintain the deformed state in which the material is deformed into a thick shape.

In the above embodiment, the connecting shaft
Although the case where 14 is used for the connecting portion between the first leveling body 11 and the second leveling body 12 has been described, for example, a work machine connecting portion such as a three-point link mechanism of a tractor and a tractor connecting portion of the agricultural work machine 1 are described. It can also be applied to the connecting portion with 2.

[0047]

According to the first aspect of the present invention, by deforming the deforming portion of the connecting shaft body by the gap filling means, the gap between the peripheral portion of the opening of the connecting shaft body and the connected body and the connecting shaft. Since it is possible to fill the gap between the peripheral portions of the openings of the main body and the connecting body, it is possible to suppress rattling and to reduce noise.

According to the second aspect of the present invention, the deformable body can be deformed by the attachment body, and the outer peripheral side of the deformable body can be brought into close contact with the peripheral portions of the openings of the connected body and the connected body. It is possible to suppress the occurrence of rattling and reduce noise.

According to the third aspect of the invention, since the deformable body is composed of the elastic member capable of elastically deforming, it is possible to appropriately suppress the rattling and further reduce the noise.

According to the fourth aspect of the present invention, the deformed state of the deformable body can be appropriately maintained by the screwing tool screwed to the outer peripheral side of the shaft body.

According to the fifth aspect of the present invention, it is possible to suppress rattling in the case of performing the plowing work with the cultivating body and the grading work with the first leveling body and the second leveling body, thereby achieving quietness. be able to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a connecting shaft for an agricultural work machine of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a deforming portion of a connecting shaft for an agricultural working machine is deformed.

FIG. 3 is a partial plan view of the agricultural working machine equipped with the connecting shaft for the agricultural working machine.

FIG. 4 is an overall side view of the same agricultural working machine.

[Explanation of symbols]

1 farm work machine 6 cultivated bodies 11 First leveled body that is the connected body The second ground level body that is a 12-connected body 14 Connecting shaft for agricultural machinery 23,31 opening 23b, 31b peripheral part 41 axis 42 deformed body 43 Elastic member 45 Nuts that make up a screw attachment that is an attachment 61 Connection shaft body 62 Deformation part 63, 64 gap 65 Gap filling means

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01B 35 / 04,33 / 12 F16D 1/06 F16C 17 / 00,33 / 00

Claims (5)

(57) [Claims] 1. A connecting shaft for an agricultural work machine for rotatably connecting a connected body to a connected body, wherein the connecting shaft is loosely inserted into the opening of the connected body and the opening of the connected body, and has an outer periphery. A connecting shaft main body having a deformable portion on the side, a gap between the connecting shaft main body and a peripheral edge portion of the opening of the connected body, and a gap between the connecting shaft main body and a peripheral edge portion of the opening of the connecting body. And a gap filling unit that deforms the deformable portion of the connecting shaft body so that the connecting shaft body is filled with the gap. 2. A connecting shaft for an agricultural work machine for rotatably connecting a connected body to a connected body, wherein the connecting shaft is substantially cylindrical and is loosely inserted into the opening of the connected body and the opening of the connected body. And a substantially cylindrical deformable body fitted to the outer peripheral side of the shaft body and having an outer diameter smaller than the inner diameter of the peripheral portion of each opening before being deformed, An attachment body attached to the outer peripheral side of the shaft body so as to be pressed against the end face of the deformable body, and deforming the deformable body to bring the outer peripheral side of the deformable body into close contact with the peripheral edge portion of each opening. A connecting shaft for agricultural work machines characterized by the above. 3. The connecting shaft for an agricultural work machine according to claim 2, wherein the deformable body is composed of an elastic member that is elastically deformable. 4. The connecting shaft for an agricultural work machine according to claim 2, wherein the attachment body is a screw attachment tool screwed onto the outer peripheral side of the shaft body. 5. The connecting shaft for an agricultural work machine according to claim 1, which has an axial direction in the left-right direction, a cultivating body for cultivating work while rotating in a predetermined direction, and a rear side of the cultivating body. A first ground body, which is a body to be grounded and is rotatably arranged in a vertical direction, and is connected to the first ground body through the connecting shaft so as to be vertically rotatable. And a second leveling body which is a connection body for leveling work.