JP2820343B2 - Dual plow connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twin plow coupling device,
It mainly relates to connecting an automatic reversing double plow to a tractor.

[0002]

2. Description of the Related Art Conventionally, as this type of double plow, for example, the configuration described in Japanese Patent Publication No. 57-39123 is known. In this configuration, the connecting frame of the twin plow is connected to the top link and the tip of the lower link of the tractor, and the twin machine is provided with a double plow and a reversing switching mechanism for reversing the double plow. An operating bracket is rotatably supported by the connecting machine frame in a vertically rotatable manner with a support shaft, and an interlocking rod of the reversing switching mechanism is connected to one end of the operating bracket, and the other end of the operating bracket is connected to the connecting bracket. Is connected to one end of a chain via a coil spring, and the other end of the chain is locked to a locking body protruding from a rear portion of the tractor body, so that the top link and the lower link of the tractor can be raised and lowered. As the connecting frame of the twin plow is raised by the movement, the operating bracket is pulled by the chain and the coil spring and is rotated vertically about the support shaft, and the interlocking rod is moved back and forth, and , With this interlocking rod Operation has been bi for plow body switch is adapted to be switched to the right inverted or left inversion.

There is also known a configuration in which a mounting bracket long in the front-rear direction for mounting the chain is detachably mounted with a plurality of bolts and nuts on a differential in a rear portion of a tractor body.

[0004]

In the structure described in the above publication, a chain is stretched between a locking member protruding from a rear portion of a tractor body and an operation fitting provided on a connecting machine frame. Therefore, this chain is used for the power take-off shaft (PT
O-axis), the PTO shaft may be rubbed and damaged by the chain during the switching reversal operation of the twin plow. It may be difficult to connect the power transmission shaft for transmitting power to the tractor body, and if the locking body is projected from the rear of the tractor body, the locking body may be moved relative to the PTO shaft. It becomes an obstacle when connecting the transmission shaft, it takes time to remove the locking body at the time of the connection work, and furthermore, since the top link is attached to the fixed position at the top of the tractor body,
There is a problem that the ground height of the mounting position of the top link cannot be variably adjusted, and therefore the twin plow cannot be easily connected to various tractors.

In a configuration in which a mounting bracket is detachably mounted on a differential of a rear portion of the tractor body, the mounting bracket is long in the front-rear direction. There is a problem in that it becomes an obstacle when connecting the two, and it takes time to remove the mounting brackets in the connection work.

In view of the above, the present invention has been made in view of such a point, and the chain is rubbed against the PTO shaft when the double plow is switched and turned over by the top link and the mounting bracket for mounting the chain. The power transmission shaft for transmitting the output of the PTO shaft to the work body can be easily connected to the PTO shaft, and there is no need to project a locking body for attaching a chain to the tractor. The mounting bracket can be connected in a stable state without laterally moving to the connecting part of various tractors, and the chain can be pulled in a well-balanced position with this mounting bracket. It is an object of the present invention to provide a dual plow connection device capable of smoothly operating an operation fitting for switching and reversing.

[0007]

SUMMARY OF THE INVENTION A dual plow coupling device of the present invention includes a tractor having a top link and a lower link;
A twin plow provided with a twin plow and a reversing switching mechanism for inverting the double plow in a coupling frame connected to the top link and the lower link of the tractor; An operating bracket rotatably supported in the up-down direction and having one end connected to the interlocking rod of the reversing switching mechanism, and a base end of the top link attached to the tractor main body and rotatably attached to an upper portion thereof And a mounting bracket for extending a chain between the other end of the operating bracket at the bottom and the tractor body. A plurality of insertion holes through which connection pins are inserted at an interval in the vertical direction of the connection plate are formed to face each other, and the mounting bracket has a connection board connected between the left and right connection plates. The top end of the top link is rotatably A lower mounting portion for attaching an end of the chain is provided at a lower portion of the upper mounting portion so as to protrude rearward, and a communication hole communicating with the upper and lower insertion holes in the connection board and a vertical direction are formed. A long communication hole is formed vertically, and a spacer located between the left and right connecting plates is inserted into the communication long hole by rotation.

[0008]

According to the dual plow connecting device of the present invention, a spacer having a size that can be inserted between the left and right connecting plates according to the interval between the left and right connecting plates fixed to the upper part of the tractor body is provided. It is horizontally inserted into a vertically long communicating long hole formed in the connecting substrate. Next, the connecting board of the mounting bracket is inserted and arranged between the left and right connecting boards, and the connecting pin is inserted from the through hole of the one connecting board into the through hole of the connecting board and the through hole of the other connecting board. The connection board of the mounting bracket is connected between the left and right connection plates by the connection pins. By the connection of the connecting boards, a spacer is arranged between the left and right connecting plates, the connecting board is positioned by the spacers, and the mounting bracket is prevented from moving in the axial direction of the connecting pins.

In addition, the base end of the top link is connected to the upper mounting portion of the mounting bracket so as to be rotatable in the vertical direction, and the top of the connecting frame of the twin plow is connected to the distal end of the top link in the vertical direction. Rotatably connected to. Further, the lower left and right sides of the connecting frame of the twin plow are rotatably connected in the vertical direction to the distal ends of the left and right lower links in which the base ends are rotatably connected in the vertical direction to the lower left and right sides of the tractor body. Further, a chain is stretched between a lower mounting portion of the mounting bracket and an end of the operating bracket pivotally supported by the connecting machine frame. Therefore, by attaching the mounting bracket between the left and right connecting plates of the tractor body, the ground height at the connecting position of the top link can be easily set to an appropriate position, and the chain can be easily stretched between the operating bracket and the top bracket. And the twin plow is easily connected to the tractor.

[0010] Then, when the connecting frame of the twin plow is raised by the upward rotation of the top link and the left and right lower links of the tractor, the operating bracket is pulled by the chain and moves vertically about the support shaft. While being rotated, the interlocking rod is moved back and forth, and the reversing switching mechanism is switched by the interlocking rod, so that the dual plow is switched between right inversion and left inversion. At this time, the end of the chain is attached to the lower mounting portion protruding toward the rear of the mounting bracket, so that the chain will not be damaged by rubbing the PTO shaft of the tractor, The mounting bracket is prevented from moving in the axial direction of the connecting pin, and the operating bracket is vertically rotated in a stable state via the chain by the mounting bracket in a stable state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a double plow.
Has a connecting machine frame 2, a plurality of double plows 3 are provided in the front and rear direction on the connecting machine frame 2, and each of the double plows 3 is switched between right inversion and left inversion and is inverted. A reverse switching mechanism 4 is provided. The connecting machine frame 2 has a connecting pin 5 provided at the upper end thereof so as to be freely inserted and removed in the left-right direction, and lower pins 6 protruding outward at the left and right lower ends, respectively. A channel-shaped base frame 7 is provided at an upper portion, and a bell-crank-shaped operating bracket 8 is located between the base frame 7 and the connection pin 5 so as to be rotatable in a vertical direction on a support shaft 9. Supported.

A front end of an interlocking rod 10 of the reversing switching mechanism 4 is provided at one end of the operating bracket 8 with a support shaft 11 and a support shaft 11a.
The other end is locked with one end of a coil spring 12, and the other end is locked with one end of a chain 13. Have been. Front ends of left and right parallel support arms 14 which are long in the front-rear direction are respectively mounted on the base frame 7 so as to be rotatable in a horizontal direction about a vertical axis 15. Removable fixing pin 16 protruding from frame 7
Is fixed so as not to rotate.

A connecting main frame 17 is attached to the rear ends of the left and right support arms 14 so as to be rotatable in the horizontal direction by connecting pins 18 and a main shaft 19. A substantially middle portion of the parallelogram frame 20 which is long in the front-rear direction is supported via the connection pin 18 and the main shaft 19, and the connection pin 18 is disposed on a side frame 20a on one side in the left-right direction of the parallelogram frame 20. The main shaft 19 is fixed to a side frame 20b on the other side of the parallelogram frame 20.

A front frame 21, a rear frame 22 and an intermediate frame 23 are formed at a front end, a rear end and an intermediate portion of the parallelogram frame 20, respectively. Double plow 3a, the rear frame 22 is the rear double plow 3b,
The intermediate plow 3c of the intermediate portion is attached to the intermediate frame 23, and the double plow 3c of the intermediate portion and the dual plow 3 of the rear portion are attached to the double plow 3a of the front side. The plows 3b are sequentially displaced in the left-right direction, and these dual plows 3a, 3b,
In each plow of 3c, the cultivated soil is tillage-turned over three rows at a time. Thus, each of the dual plows 3a,
Each of the plows 3b and 3c is switched between right and left inversions by the rotation of the main shaft 19 which is rotated by the switching operation of the inversion switching mechanism 4.

Further, the reversing switching mechanism 4 includes the main spindle.
A substantially fan-shaped spindle metal fitting 24 fixed to the upper end of 19, a guide groove formed on one side of the spindle metal fitting 24, which is rotatably supported by the rear end of the support arm 14 in the front-rear direction. A stopper 25 inserted in the guide groove, and a spring for urging the stopper 25 to be always engaged in the left and right locking recesses of the guide groove.
26, a floating metal member 27 rotatably supported in a horizontal direction on the upper part of the main shaft metal member 24, and a stopper recess provided on the lower part of the floating metal member 27 so as to be able to advance and retreat, and the stopper 25 against the spring 26. A stopper press fitting 28 for releasing engagement with the stopper push fitting 28, and projecting upward from an upper portion of the stopper press fitting 28 through a long guide groove formed in the floating fitting 27 in the front-rear direction. A protruding rod 29 having a rear end rotatably mounted on a shaft, a tension spring 30 for constantly urging the stopper pressing member 28 rearward, and a rotatable shaft supported by the other side of the main shaft 24. A spring latch 32 having a tension spring 31 stretched between the stopper pressing bracket 28 and the front end of the stopper pressing bracket 28 is provided.

Next, reference numeral 33 denotes a tractor.
A bracket 35 is integrally fixed to the upper rear end of the tractor body 34, and a plurality of insertion holes 37 are provided at upper and lower portions of the left and right connecting plates 36 which are long in the vertical direction of the bracket 35.
Are provided to face each other. Further, a connecting piece 38 is integrally provided on the left and right portions of the tractor body 34 at a position below the bracket 35, and the left and right connecting pieces are provided.
A base end of a lower link 39 is rotatably mounted on a support shaft 40 so that the base end of the lower link 39 is rotatable in a vertical direction. Is rotatably mounted on the shaft. Further, a PTO shaft (not shown) is rotatably protruded from a substantially middle portion of the rear end of the tractor body 34.

Reference numeral 41 denotes a mounting bracket.
Has a vertically long connecting board 42 disposed between the left and right connecting boards 36 of the bracket 35, and the upper and lower ends of the connecting board 42 have upper and lower ends of the left and right connecting boards 36. Communication holes 43 communicating with the upper and lower insertion holes 37 formed in the upper and lower portions are formed, and the cylindrical collars 44 located between the left and right connection plates 36 are respectively formed in the upper and lower communication holes 43. It is inserted and fixed integrally. A vertically long communication slot 45 communicating with an insertion hole 37 formed in an intermediate portion of the left and right connection plates 36 is provided in the connection board 42 between the communication holes 43 in the upper and lower portions. Is formed. Then, at least two selected insertion holes 37 above and below the left and right connection plates 36 and upper and lower communication holes 43 or the communication holes 43 of the connection board 42.
And the connection pin 46 is inserted into the communication long hole 45, respectively.
A connection board is provided between the left and right connection plates 36 by the upper and lower connection pins 46.
42 are connected.

A U-shaped connecting bracket 47 as an upper mounting portion is integrally fixed to the upper rear end of the connecting board 42, and the upper and lower mounting plates 48 on the left and right sides of the connecting bracket 47 are opposed to each other. Are provided with mounting holes 49 facing left and right. The base end of the top link 50 is located between the left and right mounting plates 48.
A base end portion 50a of the top link 50 is rotatably mounted in a vertical direction by a connecting pin 51 inserted between one of the upper and lower mounting holes 49 opposed to each other. The distal end of the top link 50 is pivotally mounted on the connecting pin 5 at the upper end of the connecting machine frame 2 so as to be vertically rotatable.
Further, a mounting rod 52 as a lower mounting portion is integrally protruded rearward and downward from a lower end of a rear end of the connection board 42, and a hook 53 is integrally fixed to a rear end of the mounting rod 52.
The other end of the chain 13 is detachably attached to 53.

Further, a spacer 54 is removably inserted into a vertically long communicating long hole 45 formed in an intermediate portion of the connecting board 42. The spacer 54 has a height and a thickness that can be vertically inserted into the communication long hole 45 that is long in the vertical direction, and has a width that can be inserted in a close state between the left and right connection plates 36 of the bracket 35. In the middle part in the width direction, an engaging concave part 55 is formed at an intermediate part in the width direction. A plurality of types of the spacers 54 having a width that can be inserted in close proximity to any of the left and right connection plates 36 having different intervals in the bracket 35 of the various tractors 33 are prepared.

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

When the twin plow 1 is connected to the tractor 33, the bracket 35 fixed to the upper part of the tractor body 34 can be inserted between the left and right connecting plates 36 according to the distance between the left and right connecting plates 36. A spacer 54 having a size is selected, and the selected spacer 54 is inserted into a vertically long communication elongated hole 45 formed in the connection board 42 of the mounting bracket 41 in a vertical state in which the engagement concave portion 55 faces upward. The spacer 54 is rotated horizontally by approximately 90 degrees from the vertical state, and the opening edge 45a of the communication long hole 45 is engaged in the engagement recess 55 of the spacer 54. It is inserted horizontally into the hole 45.

Next, the connecting board 42 of the mounting bracket 41 is vertically adjusted in position between the left and right connecting plates 36 of the bracket 35 fixed to the upper part of the tractor body 34, and is disposed. At least two selected upper and lower opposing insertion holes 37 of the connecting plate 36, and these upper and lower two insertion holes 37
The connection pin 46 is inserted into the upper and lower two communication holes 43 or one of the communication holes 43 and the communication long hole 45 of the connection board 42 communicating with the connection board 42, and the upper and lower connection pins 46 are used to connect the left and right connection plates 36. Then, the connecting board 42 of the mounting bracket 41 is connected and fixed. In this case, in other words, when connecting using one communication hole 43 and communication long hole 45 of the connection board 42, since the communication long hole 45 in the middle portion is formed to be long in the vertical direction, various tractors 33 Bracket 35
Can be connected corresponding to the hole pitch of the insertion holes 37 of the left and right connection plates 36 facing each other.

When the connection board 42 is connected, the left and right portions of the spacer 54 horizontally inserted into the connection board 42 are disposed close to each other between the left and right connection plates 36. While the connection board 42 is positioned, the mounting bracket 41 is prevented from moving in the axial direction of the connecting pin 46, the mounting rod 52 below the mounting bracket 41 is prevented from moving in the left-right direction, and It is possible to prevent the towing efficiency from being deteriorated and the balance of towing the chain 13 from being lost.

Next, a top link 50 is provided between the left and right mounting plates 48 of the connecting fitting 47 fixed to the upper rear end of the connecting board 42.
A base end portion 50a is provided, and a mounting hole 49 at one of the selected upper and lower positions of the mounting plate 48 and a top link
The connecting pin 51 is inserted through the base end 50a of the
The base end 50a of the top link 50 is vertically rotatably connected between the left and right mounting plates 48, and the upper end of the connecting frame 2 of the twin plow 1 is attached to the tip of the top link 50. The connecting pins 5 are connected so as to be rotatable vertically. In addition, the distal ends of the left and right lower links 39 whose base ends are rotatably connected to the lower left and right connecting pieces 38 of the tractor body 34 with the support shaft 40 in the vertical direction are connected to the connecting frame 2 of the twin plow 1. The lower pin 6 protruding left and right is connected to the lower pin 6 so as to be rotatable vertically.

A coil spring 12 is interposed between a hook 53 of a mounting rod 52 protruding rearward and downward of the mounting bracket 41 and an end of an operating bracket 8 pivotally supported by the connecting machine frame 2. The chain 13 is stretched. Therefore, by attaching the mounting bracket 41 to the bracket 35 of the tractor body 34, the ground height at the connecting position of the top link 50 is easily set to an appropriate position, and the chain 13 is easily stretched between the operating bracket 8 and the top link 50. And the twin plow 1 is easily connected to the tractor 33.

When the top frame 50 of the tractor 33 and the left and right lower links 39 are rotated upward, the connecting machine frame 2 of the twin plow 1 is raised, so that the operating bracket 8 is moved by the coil spring 12 and the chain 13. The linking lever 10 is pulled up and down and pivoted about the support shaft 9, the interlocking rod 10 is moved back and forth, and the interlocking rod 10 switches the inversion switching mechanism 4. The parallelogram frame 20 is actuated by the rotation of the main shaft 19 of the
3a, 3b, and 3c are switched to right inversion or left inversion in the same direction. At this time, the end of the chain 13 is connected to a hook 53 at the rear end of a mounting rod 52 protruding rearward of the mounting bracket 41.
Since the chain 13 is attached to the tractor 33, the chain 13 is stretched at a position largely separated rearward from the PTO shaft of the tractor 33. Therefore, the chain 13 is switched when the dual plows 3a, 3b, 3c are switched over. Does not damage the PTO shaft of the tractor 33.

[0028]

According to the present invention, the upper mounting portion for mounting the base end of the top link between the left and right connecting plates fixed to the upper portion of the tractor body and the rearward for mounting the end of the chain. Since the connecting board of the mounting bracket having the protruding lower mounting portion is connected by the connecting pin, the twin plow can be easily connected to various tractors by this mounting bracket, and the lower part of the mounting bracket Since the mounting portion protrudes rearward, the chain stretched between the lower mounting portion and the operating bracket pivotally supported by the connecting frame of the twin plow is connected to the P of the tractor.
The PTO shaft can be installed at a position away from the TO shaft, and the PTO shaft is not damaged by rubbing the PTO shaft with the chain during switching operation of the twin plow. The power transmission shaft to be connected can be easily connected, there is no need to project a locking body for attaching the chain to the tractor, and the time required to remove the locking body when connecting the power transmission shaft to the PTO shaft is also increased. In addition, a vertically long communicating long hole is formed in the connecting board of the mounting bracket, and a spacer located between the left and right connecting plates is inserted into the communicating long hole by rotation. Can be connected in a stable state without laterally moving between the connecting plates of various tractors with different intervals between the left and right connecting plates,
With this mounting bracket, the chain can be towed at a fixed position in a well-balanced manner, and the operating bracket for switching and reversing the dual plow can be smoothly operated.

[Brief description of the drawings]

FIG. 1 is a side view of a twin plow connecting apparatus showing one embodiment of the present invention.

FIG. 2 is a side view showing a connection state of the mounting bracket.

FIG. 3 is a cross-sectional view taken along line a-a in FIG.

FIG. 4 is a side view showing the detached state of the mounting bracket.

FIG. 5 is a sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Double plow 2 Coupler frame 3 Double plow 4 Inversion switching mechanism 8 Operating bracket 10 Interlocking rod 13 Chain 33 Tractor 34 Tractor body 36 Connection plate 37 Insertion hole 39 Lower link 41 Mounting bracket 42 Connection board 43 Communication hole 45 Communication Slot 46 Connecting pin 47 Upper mounting part 50 Top link 52 Lower mounting part 54 Spacer

Claims (1)

(57) [Claims] 1. A tractor having a top link and a lower link, and a twin plow and a reversing switching mechanism for reversing the dual plow are provided on a connecting machine frame of the tractor connected to the top link and the lower link. A twin plow, an operating bracket rotatably supported in the up and down direction on the connecting machine frame of the twin plow to connect an interlocking rod of the reversing switching mechanism to one end, and an upper part attached to the tractor main body; A mounting bracket for rotatably attaching a base end of the top link to the other end of the operating bracket at the lower portion, and a tractor body at an upper portion. The left and right connecting plates opposed to each other are integrally fixed, and a plurality of insertion holes through which connecting pins are inserted are spaced apart in the vertical direction of the left and right connecting plates. Having a connecting board connected between the connecting plates An upper mounting portion for rotatably mounting the base end of the top link is formed on the upper portion of the connecting board, and a lower mounting portion for mounting the end of the chain is protruded rearward below the lower mounting portion. A communication hole communicating with the upper and lower insertion holes and a communication long hole extending in the vertical direction are formed vertically on the connection board, and a spacer positioned between the left and right connection plates is rotated in the communication long hole by rotation. A twin plow coupling device, which is inserted and attached.