JP2002305909A - Supporting apparatus for implement of tractor, or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To vertically regulate a rotary tillage device in an intact mounted state with a regulating support rod provided in a supporting device for regulat ing vertical positions of the rotary tillage device when an implement mounted through the supporting device on the rear of a tractor is the rotary tillage device. SOLUTION: This supporting apparatus of the tractor, or the like, for the implement is composed by screwing a supporting rod 29 for the male having an external thread screw 29a on the outer peripheral part forming the regulating support rod 4 into a supporting rod 28 for the female having an internal thread screw 28a in the inside diameter part so that the vertical positions of the implement mounted through the supporting device on the rear of the tractor can be regulated in the intact mounted state and making either one of the supporting rods 29 and 28 solely turnable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device provided with an adjusting support rod configured to be able to adjust the vertical position of a working machine mounted on a rear portion of a tractor via a supporting device while the working machine is mounted. It can be used as a support device for a working machine such as a tractor.

[0002]

2. Description of the Related Art Assuming that a working machine supported on a rear portion of a tractor by, for example, a support device having a 3P top ring structure composed of a pair of a lower support rod and an upper support rod is a rotary plow, the rotary plow is used to plow. When performing the work and the substituting work, etc., the rotary tillage device has a male support rod having a male screw thread on the outer peripheral portion forming an adjustment support rod having a short overall length provided on the support device. Screw into a female support rod having a female screw thread to the part, fix one side with a lock nut or the like, set the initial vertical height position of the rotary tilling device, and then The rotary tilling device is attached to the rear of the main body of the tractor via, and tilling work and substituting work are performed.

When changing the initial vertical height position of the rotary tilling device, the adjustment can be performed with the rotary tilling device still attached, because the total length of the male and female support rods of the adjusting support rod is short. It is impossible, and after removing the rotary tilling device from the rear of the tractor and performing readjustment, the rotary tilling device is mounted on the rear of the tractor again to perform the tilling operation, the substituting operation and the like.

[0004]

When the working machine mounted on the rear part of the tractor via a support device is a rotary tilling device, the rotary tilling device can be used during the tilling operation and the reciprocating operation during the substituting work. It is necessary to greatly raise this rotary tilling device. For this purpose, the length of the adjustment support rod formed by the male and female support rods provided on the support device for adjusting the vertical position of the rotary tilling device is shortened, and the rotary tilling device is configured to rise quickly. With the tillage device still attached, the initial vertical position cannot be readjusted with the male and female support rods of the adjustment support rod. For this reason, adjustment is performed by removing the rotary tillage device and performing the adjustment. Although it takes time and effort, the present invention is intended to solve these problems.

[0005]

To this end, the present invention, according to the first aspect of the present invention, adjusts the vertical position of a working machine 2 mounted on a rear portion of a tractor 1 via a supporting device 3. A male screw 2 is provided on the outer periphery of the support rod 4.
A male support rod 29 having a female screw 9a
The screw is inserted into the female supporting rod 28 having a, and one of the female supporting rods 28 is configured to be rotatable independently, and the working device 2 is provided on the supporting device 3 so as to be vertically adjustable while being mounted. And a working machine support device such as a tractor.

[0006]

A supporting device 3 having a 3P top link structure comprising a pair of lower supporting rods and upper supporting rods at the rear of the tractor 1.
When performing the tilling work and the substituting work by mounting the rotary tilling device 2 through the rotary tilling device 2 in advance,
The adjustment support rod 3 having a short overall length provided on the support device 3
The male support rod 29 having a male screw thread 29a on the outer peripheral part, the female screw thread 28a on the inner diameter part, and being inserted into the independently rotatable female support rod 28 to a predetermined position, Both ends of the rotatable female support rod 28 are fixed with lock nuts or the like, and the rotation of the female support rod 28 alone is fixed, and the male / female support rods 29, 28 are integrated. Then, the total length of the adjustment support rod 4 is set to a predetermined length, the initial vertical height position of the rotary tilling apparatus 2 is set, and the tilling work, the scraping work, and the like are performed.

When changing the initial vertical position of the rotary tilling device 2 halfway, the rotary tilling device 2
With the arm mounted, loosen the lock nuts to which both ends of the female support rod 28 of the adjustment support rod 4 are fixed, and turn the female support rod 28 to a state in which the female support rod 28 rotates independently. The insertion length of the screw into the support rod 29 is changed to a predetermined length, the both ends of the female support rod 28 are fixed again with lock nuts, and the rotation of the female support rod 28 alone is fixed. The male and female support rods 29 and 28 are integrated, the total length of the adjustment support rod 4 is adjusted and set to a predetermined length, and the initial vertical position of the rotary tillage device 2 is readjusted. Perform tillage work, scraping work, etc.

[0008]

According to the present invention, when the rotary tilling device 2 for tilling and substituting is mounted on the rear part of the tractor 1, it is necessary to quickly raise the rotary tilling device 2 quickly during reciprocation when performing these operations. For this purpose, the overall length of the adjusting support rod 4 for adjusting and setting the initial vertical height position of the rotary tillage device 2 is made shorter, but the male supporting rod forming the adjusting support rod 4 is provided. 29 is female support rod 2
8 and the both ends of the female support rod 28 are fixed with lock nuts.
And the female support rod 28 is configured to be rotatable independently by loosening the lock nuts at both ends, so that the rotary tilling device 2 can be mounted on the tractor 1 in a mounted state. The initial vertical height position can be readjusted, thereby making it unnecessary to remove the rotary tillage device 2, and the time and effort required for adjustment can be greatly reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. At the rear of the tractor 1, a support device 3
And a rotary tilling device 2 that is a working machine 2 that performs a tilling operation, a substituting operation, etc. The support device 3 has a configuration in which an adjustment support rod 4 for manually adjusting the vertical position of the rotary tillage device 2 is provided on the support device 3. The support device 3 and the adjustment support rod 4 will be illustrated and described mainly as shown in FIGS.

As shown in FIG. 4, the tractor 1 is provided with a pair of front wheels 6 on both left and right sides of a lower front portion of the traveling body 5 of the tractor 1 and provided on both left and right sides of a lower rear portion. Is a configuration in which a pair of rear wheels 7 are pivotally provided. A steering wheel 8 is provided at an upper front portion of the traveling vehicle body 5, and a cockpit 9 on which an operator to operate the steering wheel is provided, and a front wheel 6 is operated by operating the steering wheel 8. Is done. The front and rear wheels 6 and 7 are driven and steered to form a four-wheel drive four-wheel steering system.

As shown in FIG. 4, an engine 11 is provided inside the engine room, which is covered with a hood cover 10 above the traveling chassis 5 and in front of the steering wheel 8. Further, an output gear case 12 is provided at a rear portion of the traveling chassis 5, and the rotary plow 2 as the work implement 2 is rotationally driven by an output from a transmission mechanism 12 a provided inside the output gear case 12. .

As shown in FIGS. 1 to 4, a support device 3 is mounted on the rear portion of the tractor 1, and a rotary tilling device 2 is mounted on the rear side of the support device 3.
As shown in FIGS. 2 to 4, the rotary tillage device 2 is provided with a support case 13 on the right side, a gear case 14 with a transmission mechanism 14a provided on the left side, and an input transmission mechanism 1 in the center.
An input gear case 15 having a built-in 5a is provided, and the support case 13, the gear case 14, and the input gear case 15 are connected by drive pipes 16 on both the left and right sides. The drive pipe 16 on the left has a transmission mechanism 16a inside.

The support case 13 of the rotary tillage device 2
At the lower end between the gear and the gear case 14, a tilling pipe 17 is rotatably supported as shown in FIG. A plurality of claw holders 18 having a box-shaped cross section are fixedly provided on the outer peripheral portion of the tilling pipe 17 in a spiral or linear manner at predetermined intervals. This claw holder 18
Has a configuration in which a tilling claw 18a is mounted with bolts, nuts and the like. The ceiling plate cover 19a and the left and right plate covers 19 are provided on the rotation outer peripheral portion and the left and right side portions of the tillage claw 18a.
This is a configuration in which a rotary cover 19 composed of b and 19c is provided.

The support device 3 is shown in FIGS. 1, 2 and 4
The support plate 25a protrudes from the traveling vehicle body 5 side as shown by the arrow, and has a special 3P top ring configuration in which the front and rear length of the adjusting support rod 4 is shortened. The lower mounting provided on the left and right sides of the rear end of the traveling vehicle body 5 Between the plate 20a and the U-shaped rear mounting plate 20b provided on the input gear case 15, support pins 21a are provided at both ends of a pair of lower support rods 21 so as to be rotatably connected. . The output shaft 12b of the transmission mechanism 12a of the output gear case 12 and the input transmission mechanism 1 of the input gear case 15
The universal joint rod 22, which is an upper support rod for connecting the input shaft 15b to the input shaft 15a, is provided so as to be freely bent and connected. A base portion of a lift arm 23 is rotatably supported by a support pin 23a on an upper body 5a above the traveling vehicle body 5, and a distal end portion of the lift arm 23 and a lower support rod 2 are provided.
A support pin 23c is provided at both ends of a connecting rod 23b so as to be rotatably connected to a substantially middle portion in the front-rear direction of the connecting rod 23.

The adjustment support rod 4 for adjusting the vertical position of the rotary tillage device 2 is a part of the components of the support device 3 as shown in FIG. The upper mounting plate 20c provided above the rear end of the traveling chassis 5 is provided with a support plate 25a. At the upper end of the input gear case 15, a rear upper mounting plate 2 is provided.
5b, after which one end of the support plate 24 is pivotally supported by a support pin 24a on the upper mounting plate 25b so as to be rotatable. The other end of the support plate 24 and the support plate The adjustment support rod 4 is rotatably supported by each support pin 4a and rotatably connected to the tip end of the support 25a. Further, a support pin 24b provided at a substantially intermediate portion of the support plate 24 in the front-rear direction.
And a support pin 21a of the rear mounting plate 20b, the receiving rod 24c is pivotally supported and rotatably connected.

As shown in FIG. 1, a link ball 26b is rotatably inserted into a case 26a of a support case rod 26 on one side, and the adjustment support rod 4
, A support shaft 27 is fixedly provided, and a distal end portion of the support shaft 27 forms a large-diameter portion 27a and a helical screw 27b
A lock nut 27c is screwed into the spiral screw 27b. This large diameter portion 27a is
A female support rod 28 having an internal thread with a female screw 28a is inserted into the internal diameter of the female screw 28a, and the female support rod 28 is independently rotatable with a predetermined gap. In addition, the female supporting rod 28 is provided with a small-diameter portion 28b at one end thereof to prevent the female supporting rod 28 from coming off. The support shaft 27 is formed integrally with the case 26a,
The portion 7a may be pressed into the inner diameter of the female screw 28a of the female support rod 28. Alternatively, the support shaft 27 and the case 26a
Means that the large diameter portion 27a of the support shaft 27 is manufactured separately.
Is inserted into the female support rod 28, the shaft end of the support shaft 27,
The support case 26 may be fixed by welding or the like. Alternatively, two semicircular female support rods 28, 28 are manufactured, and after inserting the large-diameter portion 27a of the support shaft 27 into these semicircular female support rods 28, 28, the semicircular female The supporting rods 28, 28 may be joined and the outer peripheral portion may be fixed by welding or the like. With any of these, the support case rod 26 and the female support rod 28 are integrally formed.

As shown in FIG. 1, the adjusting support rod 4 has a structure in which a support case rod 26 and a male support rod 29 having a male screw 29a on the outer periphery are integrally formed. A link ball 26 is attached to the case 26a of the support case rod 26.
b is rotatably inserted. The male screw 29a of the male support rod 29 into which the lock nut 27c is screwed is formed integrally with the female screw 28a of the female support rod 28.
The female support rod 28 and the male support rod 29 are used to adjust the short length of the female support rod 28 using lock nuts 27c and 27c provided at both ends of the female support rod 28. The configuration is such that the rod 4 is formed, and the vertical height position of the rotary tilling device 2 can be set to an initial predetermined height position and can be adjusted by the length of the screw insertion. In addition, the overall length (L) of the adjusting support rod 4 is shortened, and the vertical height position of the rotary tilling device 2 can be adjusted.

When changing the vertical height position of the rotary tilling device 2, the lock nuts 27c, 27c are loosened, and the independently rotatable female support rod 28 is rotated. After the entire length formed by the support rod 28 and the male support rod 29 is changed to a predetermined length and set, the lock nuts 27c, 27c are used to fix the entire length. The height position is a configuration in which an initial predetermined height position can be adjusted.

Thus, the adjusting support rod 4 is constituted by the female supporting rod 28 for adjusting the vertical position of the rotary tilling apparatus 2 and the male supporting rod 29, and the female supporting rod 28 The female support rod 28 can be fixed and independently rotated by the lock nuts 27c provided at both ends, and the total length of the adjustment support rod 4 can be changed. Can be adjusted vertically while the rotary tilling device 2 is mounted on the tractor 1, and the time and effort for adjustment can be greatly reduced. Since the total length of the support rod 4 can be shortened, the rotary tilling apparatus 2 can be quickly and greatly raised when circulating in a field.

During the operation of the rotary tillage device 2 during up / down adjustment of the tillage depth and during up / down operation during traversing,
By operating the operation lever 30, the lift arm 23, the connecting rod 23
b, the rotary tilling apparatus 2 is vertically adjusted with the support pin 21a at the front of the support rod 21 as a center of rotation via the lower support rod 21.

As shown in FIGS. 5 to 8, the supporting device 31
The rotary tillage device 32 for the support device 31 is provided with a receiving plate 33 above the input gear case 15 as shown in FIG.
The upper support plate 34 is mounted.
An upper, middle, and lower insertion hole 34a is provided in the upper part of the device, and a support pin 34b is inserted into any of the insertion holes 34a, and is detachably attached with a nut or the like. A lower support plate 35 having a U-shaped cross section is provided on the front side of the input gear case 15, and upper, middle, and lower insertion holes 35 a are provided on both left and right sides of the lower support plate 35. A support pin 35b is inserted into one of the insertion holes 35a on both sides.
And the left and right ends of the support pin 35b are detachably mounted with nuts or the like.

The support device 31 has a 2P top ring configuration as shown in FIGS. 5 to 8, and is provided with mounting plates 36 on both left and right sides of the rear end of the traveling chassis 5, and the rear end of the mounting plate 36 is provided. A support shaft 36a projecting outward is fixedly provided on the outer surface of the portion. Hitch 37 of the support device 31
Are formed in a substantially A-shape in plan view by left and right support rods 37a and 37b as shown in FIGS. 5, 7 and 8, and between the upper ends of these left and right support rods 37a and 37a, An upper hook 38 having an upper receiving groove 38a is fixedly provided.
Left and right lower holding plates 41a, 41 provided on the outer side surfaces of a, 37b
A lower hook 39 having a lower receiving groove 39a is fixedly provided at the rear end of the b.

FIG. 5,
7, and a fixing handle 40 is rotatably provided as shown in FIG. The fixing handle 40 is connected to the rotating plate 4.
A rotation lever 40b is fixedly mounted on the rotation lever 40a, and the rotation plate 40a is rotatably mounted on a support pin 40c.

Left and right support rods 37a, 3 of the hitch 37
As shown in FIGS. 5 and 7, left and right lower support rods 41a and 41b having a U-shaped groove 41c at the distal end are fixedly provided on the outer surface of the left and right support rods 41a and 41b. Each U
The configuration is such that the groove 41c is inserted into the support shaft 36a of the mounting plate 36, and mounted with the bolt 41d and the nut 41e.

Transmission mechanism 1 built in output gear 12
2a and an input shaft 15b of an input transmission mechanism 15b built in an input gear 15 of a rotary tillage device 32.
5 and 6, a universal joint rod 42 is provided and connected therebetween.

As shown in FIG. 6, the universal joint rod 42 has a spline yoke 43 provided with a journal kit 43a at one end at the front and a journal kit 44a at one end at the rear. The spline yoke 43 is connected to the provided clutch yoke 44 by a double yoke 45 and can be bent freely.
At the center with the clutch yoke 44, a spline hole 43 is provided.
b, 44b, and these spline holes 43b, 44b
In this configuration, the output shaft 12b and the input shaft 15b of the spline are inserted, and a lock pin 43c is inserted into the output shaft 15b.

As shown in FIG. 6, a supporting metal 46 is provided at the shaft end on the other side of the clutch yoke 44, and is supported by a bearing 47 provided inside the supporting metal 46. The support metal 46 has a configuration in which the inner ring 46a and the outer ring 46b are in contact with each other by a plurality of ribs 46c, and support shafts 46d, 46d are provided on the outer peripheral surface of the outer ring 46b. It is a configuration with a stop.

The support shafts 46d, 46 of the support metal 46
d is the left and right support rods 37 of the hitch 37 as shown in FIG.
A connecting rod 48 is fixedly provided at a lower portion between the connecting rods a and 37b, and supporting rods 48a,
48a. The power of the input shaft 12b is transmitted via the universal joint rod 42 to the input shaft 15b.
And the rotary tilling device 32 is driven to rotate.

An upper vehicle body 5a above the traveling vehicle body 5 includes:
As shown in FIG. 5 and FIG.
The rotating shaft 49 has a structure in which a rotating plate 49a is fixedly provided. The left and right supporting plates 37a and 37b of the hitch 37 have a left and right supporting plate 50 as shown in FIGS.
a, 50b are fixedly provided, and the left and right support rods 50a, 50b are provided.
Reference numeral 50b denotes a configuration bent toward the inner central portion, and a rotating plate 49a is inserted into the distal end between the left and right support rods 50a and 50b, and connected by connection pins 49b. .

The rotary tilling device 32 is mounted on the hitch 37 at the rear of the traveling body 5 of the tractor 1 by connecting the support pin 34b mounted on a predetermined position of the upper support plate 34 of the rotary tilling device 32 to the upper hook 38 of the hitch 37. Into the upper receiving groove 38a, and thereafter, the turning lever 40 of the fixed handle 40
b to rotate the rotating plate 40a and the lower receiving groove 39a of the lower hook 39 of the hitch 37 to the open state, and to attach the support mounted on the lower support plate 35 of the rotary tilling device 32 to a predetermined position. The pin 35b is inserted into the lower receiving groove 39b of the lower hook 39, and then the turning lever 40b of the fixed handle 40 is turned to the original state, and the supporting pin 35 is turned by the turning plate 40a.
When b is in the pressed state, the mounting of the rotary tilling device 32 is completed.

Thus, the universal joint rod 42 is invented as a dedicated part for the 2P top link configuration, so that the rotary tilling device 32 can be attached to the rear of the tractor 1 with one touch. Thereby, the attachment / detachment is easy and simple, and these operations can be performed in a short time.

When the tillage depth is changed during the tillage operation by the rotary tillage device 32, the operation lever 30 provided on the tractor 1 is operated to interlock with this operation.
The rotating shaft 49 is rotated by the hydraulic cylinder 30a or the like, and the rotating shaft 49, the rotating plate 49a, and the left and right rotating plates 50a, 50
This is a configuration in which the rotary tillage device 32 is adjusted up and down via b.

As shown in FIG. 5, the rotary tilling device 32 includes an insertion position of a support pin 34b to be inserted into each of the insertion holes 34a of the upper support plate 34, and an insertion hole 35a of the lower support plate 35.
The initial vertical mounting position of the rotary tilling device 32 can be changed by the insertion position of the support pin 35b inserted into the rotary tilling device.

Thus, the initial vertical mounting position of the rotary tilling device 32 can be easily and easily changed depending on the field conditions and the initially set plowing depth.
Changes can be made in a short time.

[Brief description of the drawings]

FIG. 1 is an enlarged side sectional view of an adjusting support rod.

FIG. 2 is an enlarged side view of a mounting portion of the working machine.

FIG. 3 is an enlarged plan view of the working machine with a partial cross section.

FIG. 4 is an overall side view of the tractor.

FIG. 5 is a view showing another embodiment, in which a mounting portion of a working machine;
And enlarged side view of the rotary tilling unit

FIG. 6 is a view showing another embodiment, and is an enlarged side view of a partially sectioned universal joint rod.

FIG. 7 is a view showing another embodiment, and is an enlarged side view of a support device.

FIG. 8 is a view showing another embodiment, and is an enlarged front view of a support device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 2 Work implement (rotary tillage device) 3 Support device 4 Adjustable support rod 28 Female support rod 28a Female spiral screw 29 Male support rod 29a Male spiral screw

Claims (1)

[Claims] 1. A male support rod 29 having a male screw 29a on the outer periphery, which forms an adjustment support rod 4 for adjusting the vertical position of a working machine 2 mounted on a rear portion of a tractor 1 via a support device 3. Female support rod 2 having female screw 28a
8. A work machine such as a tractor characterized in that the work machine 2 is configured to be rotatable independently while being screwed into the support device 8, and provided on the support device 3 so that the work machine 2 can be adjusted up and down with the work machine 2 mounted. Support device.