JPH0730796B2 - Agricultural machine fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to transmission of rotational power by setting a driven shaft connected to an agricultural work machine to a main shaft provided on the main body side of a tractor or the like such that an angle in the vertical direction can be changed. The present invention relates to an improvement in a joint for an agricultural machine for connecting so as to perform.

When connecting various agricultural working equipment to the main body such as a tractor and driving the work shaft, the driven shaft whose output side is transmitted to the work shaft and the power take-off shaft provided on the main body or to the power take-out shaft In some cases, the main shaft and the main shaft are conductively connected using a joint for an agricultural machine and driven by the power of the main body.

Agricultural machine joints used in this way should be mounted so that the agricultural working equipment connected to and mounted on the main body moves up and down with respect to the main body by the operation of an elevating device such as a lift arm equipped on the main body. Therefore, the structure is such that the vertical angle can be changed.

By the way, the conventional agricultural machine joint having a structure capable of changing the angle in the vertical direction is the first embodiment using a bevel gear as shown in FIGS. 1 to 3 in the conventional one. And, as shown in FIGS. 4-6,
There is a second form using a cross joint (universal joint).

In the first embodiment using the bevel gear, as shown in FIGS. 1 to 3, a driving shaft support member 1 for supporting the output end of the driving shaft a through a bearing 10 and an input for the driven shaft b. A driven shaft support member 2 whose end portion is rotatably supported by a bearing 20 and a lateral swivel fulcrum shaft 3 capable of vertically swiveling.
Is connected to the pivot fulcrum shaft 3 and the shaft 3
A driving shaft a which is mounted on a driving shaft support member 1 by mounting a bevel gear G1 via a bearing 30 so as to freely rotate around the center.
So that the bevel gear G2 attached to the output end side shaft end and the bevel gear G3 provided on the input end side shaft end of the driven shaft b pivotally supported by the driven shaft support member 2 are symmetrically opposed to each other. Bevel gear G1 that is coordinated and is loosely supported by the swivel fulcrum shaft 3
By engaging with the bevel gear G2
Is transmitted to the driven shaft b through the bevel gear G1 and the bevel gear G3, and the driven shaft support member 2 is rotated upward,
As shown in the figure, the bevel gear G3 rolls on the bevel gear G1, and the angle is changed while the rotational power is being transmitted.

However, the agricultural machine joint A of this embodiment has the bevel gear G3 when the driven shaft support member 2 is rotated up and down with respect to the drive shaft support member 1 to change the angle of the driven shaft b with respect to the drive shaft a. As a result of the rotation of the driven shaft a, the timing of the rotational power transmitted from the main driving shaft a to the driven shaft b is deviated, and the rotation range of the driven shaft b around the turning fulcrum shaft 3 is shown in FIG. As described above, since the bevel gear G3 provided on the driven shaft b interferes with the bevel gear G2 provided on the driving shaft a, the bevel gear G3 is limited, and there is a problem that a large angle cannot be set.

In addition, the form using the second cross joint is
As shown in FIGS. 4 to 6, a driving shaft support member 1 that pivotally supports the output end of the driving shaft a via a bearing 10 and an input end of the driven shaft b via a bearing 20. The driven shaft support member 2 and the driven shaft support member 2 with respect to the main shaft support member 1 via the lateral swing support shaft 3.
The shaft end portion on the output end side of the driving shaft a and the shaft end portion on the input end side of the driven shaft b are connected so as to rotate up and down about the center.
Intermediate member c and cross joint 4 coordinated between them
・ 4 has a form in which it is conductively connected via.

In the case of this form, the joint portion between the driven shaft b and the driving shaft a is two places by the two cross joints 4 located at the front and rear of the intermediate member c, but the driven shaft support member 2 has The vertical swiveling operation with respect to the driving shaft support member 1 is performed around one swivel fulcrum shaft 3, so that the cross joints 4 and 4 connecting the driven shaft b and the driving shaft a form a driven shaft support member. 2 is displaced in the axial direction of the driving shaft a and the driven shaft b when the driving shaft supporting member 1 is swung, the yoke 40 and the driven shaft provided on the driving shaft a side of the cross joint 4 are driven. The yokes 40 provided on the shaft b side are provided slidably in the axial directions of the main driving shaft a and the driven shaft b, respectively, and each yoke 40 and each bearing 10, 20 of the main driving shaft a and the driven shaft b is provided.
Since it is necessary to keep a large distance between them, there is a problem that it is necessary to increase the axial strength, which complicates manufacturing. In addition, during the turning operation around the turning fulcrum shaft 3,
As described above, the joint portion between the driven shaft b and the driving shaft a moves in the axial direction, so that the turning operation is restricted and there is a problem that the turning angle cannot be made large.

The present invention has been made in order to solve these problems that have occurred in the conventional means, and when the driven shaft is turned up and down with respect to the main driving shaft, a timing shift occurs in the transmission of the rotational power. It is an object of the present invention to provide a new means for preventing a joint portion from moving in the axial direction and allowing a large turning angle without being tightened.

Further, in the present invention, as a means for achieving this object, a main shaft support member including a fork member that rotatably supports the output end of the main shaft and surrounds the output end of the main shaft. A driven shaft support member that includes a fork member that rotatably supports the input end of the driven shaft and surrounds the input end of the driven shaft, and an output end of the driving shaft and an input end of the driven shaft. An intermediate member that is arranged between the main shaft and the driven shaft support member on the outer peripheral side of the intermediate member and is linked to them by a cross joint, and is a fork member with respect to those fork members. And a second driven shaft support member connected to each other through a pin member, and the pin member is arranged at a position where the pin member overlaps with the above-mentioned cross joint.

Next, embodiments will be described in detail with reference to the drawings. The same reference numerals as those used in the conventional means are used for the constituent elements having the same effect.

FIG. 7 is an exploded perspective view of a joint A for an agricultural machine according to the present invention, in which a is a main shaft, b is a driven shaft, and c is a driven shaft.
Is an intermediate member, 4 is a cross joint that joins the driving shaft a and the intermediate member c, 4'is a cross joint that joins the driven shaft b and the intermediate member c, and 1 is the output end of the driving shaft a. The main driving shaft support member, 2 is a driven shaft support member that pivotally supports the input end of the driven shaft b, and d is a second driven shaft support member.

The driving shaft a is a normal one whose base end side is conducted to a power take-off shaft provided in the main body, and its output end side is formed on the driving shaft support member 1 formed in a case as shown in FIG.
It is mounted via 10. Then, the shaft end portion on the output end side thereof protrudes from the driving shaft support member 1, and a fork-shaped yoke 40 which is a constituent member of the cross joint 4 is fixedly mounted on the protruding end portion via the key 40a. I am doing it.

Further, the driving shaft support member 1 that pivotally supports the driving shaft a is
A fork member 1a having a fork shape is provided at the output end of the fork so as to surround the output end of the drive shaft a.

The driven shaft b is an ordinary one whose output end side (the right end side in FIG. 7) is conducted to the work shaft of the agricultural working equipment, and its input end is a case-shaped driven shaft. Shaft support member 2
In addition, as shown in FIG. 8, it is pivotally supported via a bearing 20. The input-side shaft end of the driven shaft b projects from the input-side end of the driven shaft support member 2 as shown in FIG. 8, and the protruding end has a component of the cross joint 4 '. A fork-shaped driven shaft-side yoke 40, which has the following structure, is integrally fixed and mounted via a key 40a.

Further, the driven shaft support member 2 which pivotally supports the driven shaft b is provided with a fork member 2a on the input side of the fork member 2a on the driven shaft side which surrounds the input end of the driven shaft b. It is fixedly installed integrally.

As shown in FIG. 7, the intermediate member c is provided with fork-shaped yokes 41, 41 at the ends in the front-rear direction (the left-right direction in the figure) which are the respective constituent members of the cross joints 4, 4 '. An ordinary yoke 41 on the front end side (left end side in FIG. 7) of it.
Are connected to the yoke 40 provided at the output-side shaft end of the driving shaft a via the cross-shaped connecting member 42 and the four connecting pins 43 ... Thus, the cross joint 4 is configured. Further, the yoke 41 mounted on the rear end side of the intermediate member c includes a yoke 40 provided on the input side shaft end of the driven shaft b, a cross-shaped connecting member 42, and four connecting pins 43. The cross joint 4'is formed by connecting the two through.

As described above, the second driven shaft support member d connects the driving shaft a and the driven shaft b through the intermediate member c and the front and rear cross joints 4 and 4 ′ formed in both front and rear portions thereof. In a state of being conductively connected, the intermediate member c and the cross joints 4 and 4'are formed so as to surround them, and the driving shaft a and the driven shaft b are formed at the front and rear ends thereof as described above. The second driven shaft support member d is arranged between the main drive shaft support member 1 and the driven shaft support member 2 in a state of being conductively connected via c and the two cross joints 4 and 4 '. At this time, the projecting ends of the fork-shaped fork member 1a provided at the output side end of the driving shaft support member 1 and the fork-shaped fork member 2a provided at the input side end of the driven shaft support member 2 respectively. Fork-shaped fork members 60 and 61 that will overlap with other parts , Are respectively So設. And, fork members 60 and 61 provided on both front and rear sides,
The overlapping portions of the main shaft supporting member 1 and the driven shaft supporting member 2 with the fork members 1a and 2a are vertically pivoted by the pin members e whose lateral direction is the axial direction. As shown in FIG. 9, the pin members e ... Which are connected to each other and serve as the pivot shafts of the pivots are connecting pins 43 ... Of the cross joint 4 connecting the intermediate member c and the driving shaft a, and The pins 43 of the cross joint 4'which connects the intermediate member c and the driven shaft b and the connecting pin 43 are set so as to overlap each other in a side view.

The embodiment apparatus configured as described above operates as follows.

When the driven shaft support member 2 is swung up and down with respect to the main drive shaft support member 1, the pin member e that connects the driven shaft support member 2 and the second driven shaft support member d and the second driven shaft support member are connected. The pin member e that connects the member d and the driving shaft support member 1 is used as the center of rotation at two positions.

Further, the vertical swinging operation of the driven shaft b with respect to the driving shaft a due to this operation causes a cross joint 4'between the driven shaft b and the intermediate member c and a cross joint 4 between the driving shaft a and the intermediate member c. With the joint portions of two points of and as the turning centers, respectively, it will be performed at two points.

And, these two joint parts are the above-mentioned second
Pin members e and e for connecting the front and rear ends of the driven shaft support member d to the driving shaft support member 1 and the driven shaft support member 2, respectively.
On the other hand, as shown in FIG. 9, since the second driven shaft support member d is vertically folded with respect to the main drive shaft support member 1, the second driven shaft support member d is rotated in the vertical direction so as to move the driven shaft b. When changing the angle with respect to the driving axis a,
As shown in the figure, the joint between the driven shaft b and the driving shaft a can be rotated without causing axial movement. As a result, the driven shaft support member 2 can also be pivotally rotated by 180 degrees so as to be folded back on the upper surface of the main drive shaft support member 1 so as to have a large pivot angle range. Also, by not using the bevel gear,
There is no timing deviation in the transmission of rotational power.

Next, FIGS. 11 and 12 show another embodiment.

In this embodiment, when the driven shaft support member 2 is pivotally rotated in the vertical direction with respect to the main drive shaft support member 1, the second driven shaft support member d and the intermediate member c are rotated with respect to the driven shaft support member 2. The moving angle α and the rotation angle β with respect to the driving shaft support member 1
And so that they are always substantially equal.
Is an example in which is provided.

That is, in this embodiment, the second driven shaft support member d extends on the upper surface side in a direction orthogonal to an imaginary line connecting the pin members e located at the front and rear ends thereof. The regulation arm 70 is provided integrally or integrally and the regulation arm 70 is provided with a long hole 71 extending in the above-mentioned direction. The main shaft support member 1 and the driven shaft support member 2 have Shaft fulcrums 72, 72 are respectively provided at symmetrical positions about the second driven shaft support member d, and the respective base ends of the links 73, 73 formed to have the same length are connected to the shaft fulcrums 72, 72.
An equiangular turning mechanism f constituted by connecting each tip side of 73 to a connecting pin 74 slidably fitted in the elongated hole 71.
The driven shaft support member 2
The second driven shaft support member described above is actuated by the operation of the connecting pin 74 that slides in the elongated hole 71 and the links 73 and 73 that connect to the connecting pin 74 when the main shaft support member 1 is bent and rotated in the vertical direction. The angle α between d and the driven shaft support member 2 and the angle β between the second driven shaft support member d and the main drive shaft support member 1 are always held at substantially equal angles.

Since the rest of the configuration except this point is the same as that of the above-described embodiment, the components having the same effect are designated by the same reference numerals and detailed description thereof will be omitted.

Next, FIGS. 13 and 14 show still another embodiment.

This embodiment is a modification of the above embodiment in which the configuration of the equiangular turning mechanism f is changed. That is, in order to configure the equi-angular turning mechanism f, the driven shaft support member 2 and the main drive shaft support member 1 are symmetrically positioned about the second driven shaft support member d.
Regarding the pivot fulcrums 72 and 72, and connecting the proximal ends of the links 73 and 73 rotatably, see
Although not different from the embodiment shown in FIG. 11 and FIG. 12, the links 73, 73 have pin members e, e of the joint portions before and after the second driven shaft support member d at their intermediate portions in the longitudinal direction. Imaginary line w that intersects the imaginary line connecting them and rotatably connected by the connecting shaft 75, and the other ends of these links 73, 73 have another links 76, 76 of the same length.
The base end side of each is rotatably connected via a connecting shaft 77, and the distal end side of these other links 76 and 76 are connected so as to be closed by another connecting shaft 78, whereby the panda graph mechanism type The driven shaft support member 2 is configured to be an equal-angle turning mechanism f, so that when the driven shaft support member 2 is vertically bent and rotated with respect to the main drive shaft support member 1, the driven shaft support member with respect to the second driven shaft support member d. The rotation angle α of 2 and the rotation angle β of the driving shaft support member 1 are always held at substantially equal angles.

In this embodiment, the rest of the configuration other than the above-mentioned points is the same as that of the above-mentioned embodiment, and therefore, the components having the same effect are denoted by the same reference numerals and detailed description thereof will be omitted.

Next, FIGS. 15 and 16 show still another embodiment.

This embodiment is another modification in which the configuration of the equiangular turning mechanism f is changed. That is, the equiangular turning mechanism f is
In the driven shaft support member 2 and the driving shaft support member 1 of the agricultural machine joint A configured as in the embodiment shown in FIGS. 7 to 10, the second driven shaft support member d is different from the second driven shaft support member d. Gear-shaped portions 8 and 8 extending over the pin member e, which is a connecting shaft, are provided at each end portion on the coupling side that is coupled via the pin members e, and the tooth portion 80 of the gear-shaped portions 8 is centered on the pin member e. A semicircular arc along the virtual circular arc and formed so as to mesh with each other, whereby the driven shaft support member 2 is rotated upward with respect to the driving shaft support member 1 as shown in FIG. At this time, the second driven shaft support member d rotates by the same angle with respect to the driven shaft support member 2 and the main drive shaft support member 1, and the driven shaft support member 2 rotates with respect to the second driven shaft support member d. Angle α,
An equal-angle turning mechanism f that holds the rotation angle β of the main shaft support member 1 with respect to the second driven shaft support member d at substantially the same angle.
Is configured.

This embodiment is the same as each of the above-described embodiments in the rest of the configuration except the above-mentioned points, and therefore detailed description of the components having the same effect will be omitted with the same reference numerals.

Each of the embodiments provided with the equi-angular turning mechanism f operates in the same manner as the embodiment shown in FIGS. 7 to 10, and the driven shaft support member 2 is moved up and down with respect to the drive shaft support member 1. The intermediate member c and the second driven shaft support member d are rotated by the same angle amount with respect to the driven shaft support member 2 and the main drive shaft support member 1 when they are swung in the direction. The two cross joints 4 and 4 ′ located at the front and rear ends of the member c always have the same turning angle, and the transmission of the rotational power is stabilized.

As described above, the agricultural machine joint according to the present invention includes a driving shaft support member 1 including a fork member 1a that rotatably supports the output end portion of the driving shaft a and surrounds the output end portion of the driving shaft a. A driven shaft support member 2 including a fork member 2a which rotatably supports the input end of the driven shaft b and surrounds the input end of the driven shaft b, an output end of the driven shaft a and a driven shaft. an intermediate member c that is arranged between the input end of b and is connected to them by a cross joint 4.4 '.
The drive shaft support member 1 on the outer peripheral side of the intermediate member c
And the driven shaft support member 2 are arranged between the fork members 1a and 2a and the fork members 60 and 61 and the pin member e.
.A second driven shaft support member d that is connected via e, and the pin member e.e.
Since it is arranged so as to be overlapped with 4 ', when the driven shaft is turned up and down with respect to the main driving shaft, there is no timing deviation in the transmission of rotational power, and
The joint part is prevented from moving in the axial direction, and the turning angle can be made large.

Further, the equiangular turning mechanism f is provided so that the turning angles of the two cross joints 4 and 4'are always kept at the same angle to stabilize the transmission of the rotational power.

[Brief description of drawings]

1 to 6 show a conventional agricultural machine joint.
The figure is a plan view schematically showing the joint for agricultural machinery of the first embodiment, FIG. 2 is a side view of the same, FIG. 3 is an explanatory view of the same operation, and FIG. 4 is a second embodiment. FIG. 5 is a plan view of the agricultural machine joint of FIG. 5, FIG. 5 is a side view of the same, and FIG. 6 is an explanatory view of the operation of the same. 7 to 16 show a joint for an agricultural machine according to the present invention, FIG. 7 is an exploded perspective view of the first embodiment, FIG. 8 is a plan view schematically showing the same, 9 is a side view of the same as above, FIG. 10 is an explanatory view of the same effect as above, FIG. 11 is a side view of the second embodiment, FIG. 12 is an explanatory view of the same effect as above, and FIG. FIG. 14 is a side view of the embodiment, FIG.
FIG. 15 is a side view of the fourth embodiment, and FIG. 16 is an explanatory view of the operation of the same. Explanation of reference symbols A …… Agricultural machine joint G1, G2, G3 …… Bevel gear a …… Main shaft, b …… Drive shaft c …… Intermediate member, d …… Second driven shaft support member e …… Pin member , F …… equal angle turning mechanism f …… second driven shaft support member, w …… virtual line α ・ β …… angle, 1 …… driving shaft support member 1a …… fork member, 10 …… bearing 2 …… Driven shaft support member, 2a ... Fork member 20 ... Bearing, 3 ... Swivel fulcrum shaft 30 ... Bearing 4.4 '... Cross joint 40 ... Yoke, 40a ... Key 41 ... Fork-shaped yoke, 42 …… Coupling member 43 …… Coupling pin 60 ・ 61 …… Fork member 70 …… Regulating arm, 71 …… Oval hole 72 …… Shaft fulcrum, 73 …… Link 74 …… Coupling pin, 75 …… Coupling shaft 76 …… Link, 77/78 …… Coupling shaft 8 …… Gear-shaped part, 80 …… Tooth part

Claims (2)

[Claims] 1. A fork member 1a which rotatably supports the output end of a driving shaft a and surrounds the output end of the driving shaft a.
And a driven shaft support member 1 that includes a fork member 2a that rotatably supports the input end of the driven shaft b and that surrounds the input end of the driven shaft b, and a driven shaft. an intermediate member c arranged between the output end of a and the input end of the driven shaft b and connected to them by a cross joint 4, 4 ', and the main shaft support member on the outer peripheral side of the intermediate member c. 1 and the driven shaft support member 2 are arranged between the fork members 1a and 2a, and the fork members 60 and 61 are arranged between them.
And a second driven shaft support member d connected to each other through the pin members e, e, and the pin members e, e are arranged at positions where the pin members e, e overlap the cross joints 4, 4 '. Fittings. 2. The rotation angle α of the driven shaft support member 2 with respect to the second driven shaft support member d and the second driven shaft of the driven shaft support member 1 between the driven shaft support member 2 and the main drive shaft support member 1. The agricultural machine joint according to claim 1, further comprising an equal-angle turning mechanism f for equalizing the turning angle β with respect to the support member d.