JP2002142513A - Foldable agricultural implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foldable agricultural implement whose implement portions extended from the central portion to both the right and left sides are automatically locked in a state folded on the central portion sides, respectively. SOLUTION: This agricultural implement whose longitudinal central portion is liftably attached to the rear portion of the tractor through a link device to transmit a power from the tractor to the central portion of the agricultural implement and whose portions extended from the central portion to both the right and left sides can be folded on the central portion, respectively, is characterized by having shield covers 15, 15a and aprons 16, 16a on the outer peripheries of rotary work portions 13, 13a, and disposing lock devices 21 for engaging the aprons 16a with the shield covers 15a, when the implement portions 6L, 6R are folded on the inner end portions of the aprons 16a of the right and left implement portions, and releasing the engagement of the apron 16a with the shield covers 15a, when the implement portion is developed in a work state, and releasing the engagement of the aprons 16a with the shield cover 15 and engaging with the central apron 16, when the implement portions 6L, 6R are developed into work states.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural machine having a longitudinally central portion mounted on a rear portion of a tractor via a connecting device so as to be able to move up and down. And a farm working machine that can be folded toward the center.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, a central portion in the longitudinal direction of an agricultural work machine A is mounted on a rear portion of a tractor (not shown) via a connecting device (three-point link connecting device) B so as to be movable up and down. The power is transmitted to the central portion C of the agricultural work machine A from the above, and the working machine portion D extending to the left and right sides from the central portion C with respect to the central portion C, and the rotation shaft E is connected to the central portion C side. A farm work machine A that is foldable in the center is well known.

[0003] In the agricultural work machine A, an apron G and a leveler H are provided on the outer periphery of a rotary work unit F, and the leveler H of the center part C and the leveler H of the work machine part D are connected by a rotation axis I. . When the working machine part D is folded toward the center part C, the apron G of the center part C and the center part C
Both the apron G and the apron G are rotatable at the base end, and the apron G and the leveler H hang down, hanging around when the aircraft is running, generating noise by contacting other members, and damaging other members. There was something to do.

[0004]

As described above, in the conventional agricultural work machine A, when the machine is run with the work machine portion D folded toward the center portion C, the apron G and the leveler H are hung. Thus, there is a problem that the apron G and the leveler H hang around, generate noise by contacting other members, or damage other members.

According to the present invention, when the left and right working machine parts are folded toward the center, the apron is automatically locked on the shield cover, and when the working machine parts are deployed to the working state,
Automatically release the apron to the shield cover,
Also, when the working machine part is deployed to the working state, the folding agricultural working machine equipped with a lock device for automatically unlocking the apron to the shield cover and locking the lock pin to the apron in the center portion is provided. The purpose is to provide.

[0006]

To achieve the above object, the present invention has the following features. A. At the rear of the tractor, the longitudinal center part of the agricultural work machine is attached via a connecting device so as to be able to move up and down, and power is transmitted from the tractor to the central part of the farm work machine. In the agricultural working machine in which the working machine parts extending on both sides are respectively foldable toward the center part side, the farm working machine has a shield cover and an apron on the outer periphery of a rotary working part, and the apron of the left and right working machine parts is included. At the end, a lock device is provided for locking the apron to the shield cover when the work machine portion is folded and releasing the lock of the apron to the shield cover when the work machine portion is deployed to the working state. B. The lock device releases the lock of the apron to the shield cover when the work machine portion is deployed in the working state, and locks the apron to the central portion of the apron.

[0007]

According to the above structure, when the left and right working machine parts are folded, the apron is locked by the shield cover, the apron hangs and the hanging apron hangs during running of the machine, and the agriculture working machine of the present invention comes into contact with other members. No sound is generated and no other members are damaged. Also,
When the working machine is deployed to the working state, the locking of the apron to the shield cover is released, and the apron of the working machine rotates freely to perform the leveling work. Further, when the work machine is deployed to the working state to release the locking of the apron to the shield cover and the locking device is locked to the center apron, the center apron and the left and right work machine The apron rotates at the same time to perform the leveling work.

[0008]

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. In FIG. 1 to FIG. 3, reference numeral 1 denotes a scraping harrow having a long length in the left-right direction and having a crushing and scraping function. A lower link connecting portion 2 and a top mast 3 which are connected to a well-known three-point link hitch mechanism including a top link and a lower link of a tractor (not shown) are provided at a front central portion of the substitute harrow 1, The scraper harrow 1 is attached to the rear of the tractor so as to be able to move up and down. Further, power is transmitted from the PTO shaft of the tractor to the transmission gear box 4 provided at the front center portion of the substitute harrow 1 via a universal joint, a transmission shaft and the like via an input shaft 4a.

The scraper harrow 1 is divided into a central part 5 and a left and right working machine parts 6L and 6R, each of which has a slightly wider working width than the interval between the tires T of the tractor. The inner ends of the working machine parts 6L, 6R are connected to each other by rotating shafts (rotation fulcrums) 7, 7 so as to be able to rotate substantially 180 °, and the back of the central part 5 and the left and right working machine parts 6L, 6R
It can be folded so that it overlaps the back of the camera. Therefore, the central portion 5 has a width that can erase the wheel mark attached to the field by the tire T of the tractor. As shown in FIG. 1, the lengths of the left and right working machine parts 6L and 6R are approximately half the length of the central part 5. The working machine portions 6L, 6R are symmetrical left and right and have substantially the same configuration.

Transmission frames 8 and 8a are provided on both the left and right sides of the gear box 4 and serve as a main body frame and include a transmission shaft therein. Chain transmission cases 9, 10, 10 are respectively suspended from the work machine portion 6 </ b> L side of the transmission frame 8 and the outer ends of the transmission frames 8 a, 8 a. Further, side plates 11, 12, and 12 are suspended from the outer end of the transmission frame 8 on the side of the working machine portion 6R and the inner ends of the working machine portions 6L and 6R. Between the lower end portions of the chain transmission case 9 and the side plate 11 and between the lower end portions of the chain transmission cases 10 and 10 and the side plates 12, 13, are crushed and ground scraping rotors (rotary working portions) 13 and 13 a.

[0011] A clutch 14 is provided at an end of the transmission shaft 8, 8a where the center portion 5 of the transmission shaft and the working machine portions 6L, 6R face each other.
As shown in FIGS. 1 and 2, the clutch 14 is in the connected state when the left and right working machine parts 6L, 6R are deployed to the working state with respect to the central part 5, and as shown in FIGS. When the working machine parts 5L, 5R are turned around the rotation shaft 7 and folded on the central part 5, they are cut off. The upper part of the crushing / scraping rotors 13 and 13a is covered by shield covers 15 and 15a supported by the main body frame. 17a to pivot 17b
The upper ends of the aprons 16 and 16a pivotally supported are pivotally connected to each other via a pivot shaft 16b so as to be vertically rotatable. Body frame, apron 16, 16a and leveler 1
A compression rod is interposed between each of the compression rods 7 and 17a. The levelers 17 and 17a can be displaced between a leveling position for leveling the soil and a soil collecting position for scraping the soil.

Opposite ends of the leveler 17 in the central portion and the levelers 17a in the left and right working machine portions are connected to the bases of link arms 18 and 18a, respectively. It is pivotally connected by a pivot 19 and a pin 20. Then, in a state where the left and right working machine parts 6L and 6R are folded on the central part 5, the apron 16 and the leveler 17 in the central part are independently provided with a vertical rotation interval between the apron 16a and the leveler 17a. It is possible to operate. At the outer end of the leveler 17a, an extended leveler may be provided so as to be able to be turned upside down.

A lock device 21 shown in FIGS. 4 and 5 is provided between the apron 16 in the central portion and the aprons 16a in the left and right working machine portions. This lock device 21
Is inserted through two support holes formed in the side plate 16c of the apron, and is slidably held in a predetermined range via a spring 23, a washer 24, and pins 25, 25. . The lock pin 22 has a different length, and a tip 22a on the shorter side is insertable into and removable from a locking hole formed in the side plate 15b of the shield cover. 22b is a side plate 16 of the apron in the central portion when the left and right working machine portions 6L, 6R are deployed in the working state.
The lock pin 22 is moved against the resilience of the spring 23 in contact with the d, and the tip 22a on the shorter side is pulled out of the locking hole formed in the side plate 15b of the shield cover. Therefore, the lock of the apron 16a with respect to the shield cover 15a is released. When the left and right working machine parts 6L, 6R are folded toward the central part 5, the longer end 22
The contact of the apron b with the side plate 16c is released, and the spring 2
3. The lock pin 22 is moved by the resilient force of 3, and the tip 22a on the shorter side is inserted into the locking hole formed in the side plate 15b of the shield cover, and the aprons 16a of the left and right working machine parts are inserted.
To the shield cover 15a.

The lock device 21 may be constructed as in the second embodiment shown in FIGS. That is, in the second embodiment, the length of the lock pin 22 in the first embodiment shown in FIGS.
On both sides of 6, there are provided unlocking / locking members 26 and 27 to be fitted with the long end 22b. When the left and right working machine parts 6L and 6R are deployed to the working state, one of the longer ends 22b is fitted with the unlocking / locking member 26 and locked via the front pin 25. The pin 22 is moved against the elastic force of the spring 23, and the tip 22a on the shorter side is pulled out of the locking hole formed in the side plate 15b of the shield cover to release the lock. Further, the other end 22b on the longer side is fitted with the unlocking / locking member 27 to move the lock pin 22 against the resilience of the spring 23, and the other end 22b on the shorter side is used. 22a is pulled out from the locking hole opened in the side plate 15b of the shield cover,
unlock. When the left and right working machine parts 6L, 6R are folded toward the central part 5, the leading end 2
2b is released from the engagement with the unlocking / locking members 26, 27, the lock pin 22 is moved by the elastic force of the spring 23, and the tip 22a on the shorter side is opened to the side plate 15b of the shield cover. The aprons 16a of the left and right working machine parts are fitted into the locking holes and locked to the shield cover 15a.

In the substitute scratch harrow 1 having such a configuration, as shown in FIGS. 1 and 2, the central portion 5 and all of the left and right working machine portions 6L and 6R are operated. As shown, the left and right working machine parts 6
A form in which L and 6R are folded and work is performed only on the central portion 5,
A form in which the right working machine portion 6R is folded with respect to the central portion 5 to work with the central portion 5 and the left working machine portion 6L, and the left working machine portion 6L is folded with respect to the central portion 5 and the center portion 5 and right working are performed. The four types of work in the form of working with the machine part 6R are selected and performed according to the size and shape of the field.

In a particularly narrow field, the left and right working machine parts 6L and 6R are folded with respect to the central part 5 so that the central part 5
By working only with the apron 16, the leveler 17 is connected with the link arm 18, the pivot 19 and the pin 20.
It is possible to rotate freely and to perform good crushing and leveling work. Further, when the tractor and the work implement 1 leave the field after the work is completed, the trace of the wheel T of the tractor is erased by the central portion 5. Further, the leveler 17 in the center portion and the levelers 17a in the left and right working machine portions are connected to the link arm 1.
8, 18a, pivot 19 and pin 20 so as to be rotatable.
The work of folding the L and 6R and deploying the folded state to the working state is performed easily and smoothly.

The left and right working machine parts 6L,
When the 6R is folded, the apron 16a is locked to the shield cover 15a by the lock device 21, and the apron 16a or the leveler 17a hangs and hangs when the aircraft runs, or generates noise by contacting other members, It does not damage other members. When the working machine parts 6L, 6R are deployed to the working state, the locking device 2
1, the locking of the apron 16a to the shield cover 15a is released, and the apron 16 in the central portion and the apron 16a in the working machine portion rotate freely to perform the ground leveling work.
Further, the working machine portions 6L, 6R are deployed in the working state, and the distal end 22b on the long side is unlocked / locked by the locking member 26,
27, the shield cover 1 of the apron 16a
5a and release the lock on the apron 1
6 and the aprons 16a of the left and right working machine parts are simultaneously rotated to perform a wide range of leveling work.

[0018]

As described above, according to the folding agricultural working machine of the present invention, the following effects can be obtained by the above configuration.

When the left and right working machine parts are folded, the apron is locked to the shield cover by the lock device, and the apron hangs and hangs during running of the machine, generates noise by contacting other members, and generates other sounds. Or damage to the member. Further, when the working machine portion is deployed to the working state, the locking of the apron to the shield cover by the locking device is released, and the apron of the working machine portion can freely rotate to perform a good leveling operation. .

Further, when the work machine is deployed to the working state to release the locking of the apron to the shield cover by the locking device, and when the locking device is locked to the central portion of the apron, The aprons of the left and right working machine parts are simultaneously rotated to perform a wide range of leveling work at the same time.

[Brief description of the drawings]

FIG. 1 is a plan view of an entire folding-type scraper harrow according to the present invention.

FIG. 2 is a side view in which the left and right working machine parts are developed to work.

FIG. 3 is a side view of the left and right working machine parts in a folded state.

FIGS. 4A and 4B are partial plan views showing a state in which aprons of left and right working machine parts are locked by a lock device.

5 (a) is a partial plan view in which the left and right working machine parts are in a working state and an apron is unlocked, and FIGS. 5 (b) and 5 (c) are PP lines and Q-lines in FIG. It is a Q line sectional view.

FIGS. 6A and 6B are partial plan views showing a state in which aprons of left and right working machine parts are locked by a lock device of another embodiment.

FIG. 7 (a) shows the left and right working machine parts in a working state,
FIG. 7B is a partial plan view in which a lock of a lock device according to another embodiment is released, and FIG. 8B is a cross-sectional view taken along line RR of FIG.

FIG. 8 is a side view of a state in which work is performed with the left and right working machine portions folded.

FIG. 9 is a side view of a conventional folding working machine.

[Explanation of symbols]

Reference Signs List 1 primary scraper 2 lower link connecting part 3 top mast 4 speed change gear box 4a input shaft 5 central part of secondary scraper 6L left working machine part 6R right working machine part 7 rotating shaft (rotary fulcrum) 8, 8a transmission frame 9, DESCRIPTION OF SYMBOLS 10 Chain transmission case 11, 12 Side plate 13, 13a Crushing and scraping rotor (rotary work part) 14 Clutch 15, 15a Shield cover 15b Shield cover side plate 16, 16a Apron 16c, 16d Apron side plate 17, 17a Leveler 18 , 18a Link arm 19 Pivot 20 Pin 21 Lock device 22 Lock pin 22a, 22b Tip of lock pin 23 Spring 24 Washer 25 Pin 26, 27 Lock release / lock member T Tire of tractor

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[Procedure amendment]

[Submission date] August 7, 2001 (2001.8.7)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

Claims (2)

[Claims] 1. A longitudinally central portion of an agricultural work machine is attached to a rear portion of a tractor via a connecting device so as to be able to move up and down, and power is transmitted from the tractor to the central portion of the agricultural work machine.
In the agricultural working machine, the working machine portion extending to the left and right sides from the center portion with respect to the center portion can be folded toward the center portion side, the farm working machine includes a shield cover and an apron on an outer periphery of a rotary working portion. The apron is locked to the shield cover when the work machine is folded, and the apron is locked to the shield cover when the work machine is deployed in the working state. A folding agricultural work machine, comprising a lock device for releasing the lock. 2. The lock device according to claim 1, wherein when the working unit is deployed to the working state, the locking of the apron to the shield cover is released and the locking device is locked to the apron at the center. Item 4. The folding agricultural work machine according to Item 1.