JP3754886B2 - Rotary cover rotation adjustment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary cover rotation adjusting device that can be mounted on an agricultural tractor or the like.
[0002]
[Prior art]
Conventionally, this type of rotary cover rotation adjustment device has a rear cover connected to the rear end of the rotary cover mounted on the rear of the tractor, so the rotary cover can be rotated back and forth to move the rear cover up and down together. As a means for this, the screw is rotatably engaged in the screw cylinder, the lower end of the screw cylinder is connected to the rotary cover, and the handle on the upper part of the screw is rotated. Screw-type adjusting device, an electric expansion / contraction adjusting device in which an electric cylinder having a motor is connected in place of the handle, and an outer side of the top mast provided on the upper part of the rotary. There is known a lever rotating type that is provided by attaching an operating lever and a lever guide, rotating the operating lever back and forth and locking it to the lever guide.
[0003]
[Problems to be solved by the invention]
However, the screw type adjusting device of the above-mentioned prior art is not only easy to assemble but also not only easy to assemble, but also requires a large number of parts, and it takes a long time to adjust. However, there is a drawback that the user is difficult to use, and the electric telescopic device is also expensive, and the user is difficult to use. Since the part, the operating lever part, etc. protruded greatly outside the top mast, there was a problem that a large space was required or the appearance was poor, and that a separate lever guide was required, and the cost was increased accordingly.
An object of the present invention is to improve the above-described conventional problems.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a rear cover is continuously provided at the rear end portion of the rotary cover, and both covers are configured to be rotatable back and forth with a tilling shaft as a fulcrum. inside of a pair of top mast provided, provided the link arm back-and-forth rotation through a pivot pin by the rotation operation of the operating lever, connecting the said link arm and the rotary cover in the rod, also, the The control lever has a base end portion connected to the rotation pin on the inside of the pair of top masts, and a distal end side of the operation lever that penetrates the wall of the top mast on one side from the inside to protrude outward. Te, by rotation adjustment of the operating lever, the first characterized by being configured to allow rotation regulate rotary cover in longitudinal position.
[0005]
A second feature is that a locking groove for locking the operation lever is provided in a lever guide hole provided in the wall of the top mast on one side.
[0006]
Further, a third feature is that the operation lever is provided with an urging means so that the middle portion of the operation lever can be locked in any one of the locking grooves of the lever guide hole.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of the present invention will be described with reference to the following drawings.
1 and 2 are overall side views of the rotary device. FIG. 1 shows a state where the rotary cover is rotated forward, and FIG. 2 shows a state where the rotary cover is rotated backward. Indicates a tractor, and 2 indicates an auto hitch mounted on a three-point link at the rear of the tractor 1. Reference numeral 3 denotes a rotary, and a pair of top masts 4a and 4b are provided on the front upper part thereof, and the auto hitch 2 is connected to the connection pin 5 on the front upper part in the same manner as a normal tractor. Further, a screw-type adjusting device 8 with a handle 7 for vertically adjusting a tool bar 6 for mounting a tail wheel (not shown) is pivotally supported at the upper rear part.
[0008]
Further, a main cover 10a of the rotary 3 is provided below the top mast 4, and a rear cover 11 that rotates up and down around a fulcrum 10p is connected to an upper rear end of the top mast 4, and the rear cover 11 and the main cover 10a are connected to each other. The shock absorber 12 connects the stays 10b, 11b fixed on the respective covers. Then, the bracket 13 fixed on the upper surface of the main cover 10a is connected by a link arm 14 and a rod 15 which will be described later, and the main cover 10a and the rear cover are rotated by the link arm 14 rotating in the front-rear direction. 11 are configured to rotate back and forth around a tilling shaft 16 of the rotary 3 described later.
Reference numeral 17 denotes a plurality of tilling claws attached to the tilling shaft 16, and 18 denotes a chain case provided on the side of the rotary cover 10.
[0009]
Next, FIG. 3 is a partial cross-sectional view of the rotary 3 as viewed from the rear, and FIG. 4 is an enlarged view of the main part of the same. The gear case 20 is provided at the upper center of the rotary 3, and a pair of left and right arms are provided on both side surfaces. 21 and 22 are fixed, a chain case 18 is fixed at the left end, and a U-shaped side plate 23 is fixed downward at the right end. And between the drive side bearing part at the lower part of the chain case 18 and the passive side bearing bracket 24 fixed at the lower part of the side plate 23, the tilling shaft 16 having a plurality of tilling claws 17 attached via the metal 25, 25, respectively. It is fixed and is rotated by the power transmitted from the main unit side of the tractor 1.
[0010]
Further, the cover structure of the rotary 3 will be described. The rotary cover 10 has an arcuate top plate 10c as a base body, and reinforcing rates 10d and 10d are fixed to the front and rear end portions of the upper surface thereof, and substantially at both side ends. A main cover 10a, to which fan-shaped side plates 10e, 10e (see FIGS. 1 and 2) are fixed, is attached to the metal 25, 25 provided on both bearing portions so as to be pivotable back and forth.
[0011]
Further, the gear case 20 mounting flange portions 21a and 22a of the arms 21 and 22 are extended upward, and the top masts 4a and 4b are fixed to the top mast 4a and 4b by bolts 26 and 26 at the left and right and front and rear positions, respectively. . As shown in FIG. 4, the pair of top masts 4a and 4b has an upper half parallel to each other and a small interval, while the lower half is inclined to the left and right. The base end portion side of the operation lever 28 for adjusting the rotation of is stored.
[0012]
Reference numeral 29 denotes a U-shaped bracket at the base end of the operation lever 28, and an urging spring 30 is provided at the end of the bracket 29 to restrict the rotational position of the operation lever 28 in the front-rear direction.
Reference numeral 31 denotes a pin that serves as a pivot in the left-right direction of the operation lever 28, and the pin 31 connects the U-shaped bracket 29 and the pivot pin 32.
Moreover, the rotation pin 32 becomes a rotation fulcrum when the operation lever 28 is rotated in the front-rear direction by being connected to the pin 31 (see FIG. 5).
Although the spring 30 is shown as the biasing means of the operation lever 28 in the present plan, it is not limited to the spring 30 and any other biasing means having the same function and effect can be used. Not long.
[0013]
5 is a left side view of FIG. 4, and 33 is a lever guide hole bored in the wall of the top mast 4a on one side. The lever guide hole 33 penetrates from the inside of the top mast 4a on one side. A plurality of locking grooves 33a, 33b, 33c for locking the middle part of the operation lever 28 protruding outward are provided, and the operation lever 28 can be rotated in the left-right direction depending on the contents of work and the conditions of the field. When the dynamic adjustment is performed, the operation lever 28 is securely locked in the respective locking grooves 33a by the urging force of the spring 30. The pivot pin 32 pivots as the operation lever 28 pivots left and right as described above. The link arm 14 has a base end portion at the substantially center in the width direction of the pivot pin 32. Therefore, the rotary cover 10 is rotated to the left and right simultaneously with the rotation pin 32, and the rotary cover 10 connected to the distal end side of the rod 15 is rotated back and forth.
[0014]
The rotary adjustment device for the rotary cover according to the present invention has the above-described configuration. Before the operator starts the rotary work, the operator sets the position of the operation lever 28 in advance according to the work contents, the field conditions, and the like. Is set to the locking groove 33a at the time of standard tillage, and to the locking groove 33c at the time of shallow tillage or plowing work, but the positions of the rotary cover 10 and the rear cover 11 are appropriately set during the work. If it is determined that the tractor 1 is not, the travel of the tractor 1 is temporarily stopped, the rotary 3 is raised upward, the hand is extended backward from the driver's seat, the operation lever 28 is gripped, and the pin 31 is used as a fulcrum to attach the spring 30. Rotate outward against the force to release the locking from the locking grooves 33a, and rotate back and forth in the lever guide hole 33 to the appropriate locking grooves 33a. Quick and easy It is possible to further. When the change adjustment operation is completed, the rotary 3 is again lowered to the farm scene and the operation is resumed.
[0015]
Therefore, according to the present invention, not only is the structure simpler and the manufacturing cost is lower than the conventional one, but also it is easy to assemble, and the adjustment operation when changing the position of the rotary cover 10 can be performed easily and quickly. .
And although it is the same lever rotation system, it does not require a wide space like the conventional one, and only the operation lever 28 protrudes to the outside of the top mast 4a on one side. Since there is no hindrance and the lever guide has a simple configuration in which the lever guide hole 33 is simply formed in the top mast 4a on one side, the manufacturing cost is also reduced.
Further, since the operating lever 28 is provided with an urging means, the operating lever 28 can be securely locked in the locking groove 33a, so that even if the tractor 1 or the rotary 3 vibrates during the operation, it becomes unnatural. There will be no deviation from the set position.
[0016]
【The invention's effect】
As described above, the present invention is the rotary 3 in which the rear cover 11 is connected to the rear end portion of the rotary cover 10 and both the covers 10 and 11 are configured to be rotatable back and forth with the tilling shaft 16 as a fulcrum. Inside the pair of top masts 4a, 4b provided on the upper part of the rotary 3, a link arm 14 that rotates back and forth via a rotation pin 32 by a rotation operation of the operation lever 28 is provided, and the link arm 14 and the rotary The cover 10 is connected with the rod 15, and the operation lever 28 has a base end portion 29 connected to the rotation pin 32 inside the pair of top masts 4 a, 4 b, while the tip end side is connected to the top of one side. the lever guide hole 33 bored in the wall of the mast 4a is protruded outwardly through from the inside, by rotation adjustment of the operating lever 28, left rotation regulate rotary cover 10 in the longitudinal position As a result, the structure is simpler than the conventional screw type adjustment device and the electric type expansion / contraction adjustment device, the manufacturing cost is reduced, and it is easy to assemble, and the position of the rotary cover 10 is changed. Even an unfamiliar operator can easily and quickly adjust the time.
[0017]
Compared with the same lever rotation type, it does not require a large space like the conventional one, and only the operation lever 28 protrudes outside the top mast 4a on one side. There is no problem, and the lever guide has a simple configuration in which the lever guide hole 33 is simply formed in the top mast 4a on one side, so that the manufacturing cost can be reduced.
Further, since the operating lever 28 is provided with a biasing means, the operating lever 28 can be reliably locked in the locking groove 33a, so that even if the tractor 1 or the rotary 3 vibrates during the operation, There is no reason to deviate from the set position.
In short, the present invention has many various practical effects as described above.
[Brief description of the drawings]
FIG. 1 is an overall side view of a rotary device showing a state in which a rotary cover is rotated forward.
FIG. 2 is an overall side view of the rotary device showing a state in which a rotary cover is rotated rearward.
FIG. 3 is a partial cross-sectional view of the rotary as viewed from the rear.
FIG. 4 is an enlarged view of the main part.
5 is a left side view of FIG. 4. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tractor 3 Rotary 4 (4a, 4b) Top mast 10 Rotary cover 10p A fulcrum 11 Rear cover 13 Bracket 14 Link arm 15 Rod 16 Tilling shaft 28 Operation lever 29 U-shaped bracket 30 Spring 31 Pin 32 Rotation pin 33 Lever guide hole 33a, 33b, 33c Locking groove

Claims (3)

A rear cover 11 is connected to the rear end portion of the rotary cover 10, and both the covers 10, 11 are configured to be pivotable back and forth with a tilling shaft 16 as a fulcrum, and a pair provided at the top of the rotary 3. A link arm 14 is provided on the inner side of the top masts 4a and 4b. The link arm 14 pivots back and forth via a pivot pin 32 by a pivoting operation of the operation lever 28. The link arm 14 and the rotary cover 10 are connected by a rod 15. The operation lever 28 has a base end portion 29 connected to the rotation pin 32 inside the pair of top masts 4a and 4b, and a distal end of the operation lever 28 that is formed in the wall of the top mast 4a on one side. the guide hole 33 penetrates from the inside to protrude outward, by the rotation adjustment of the operating lever 28, and configured to allow rotation regulate rotary cover 10 in the longitudinal position low Li. The rotary according to claim 1 , wherein locking grooves 33a, 33b, 33c capable of locking the operation lever 28 are provided in a lever guide hole 33 provided in a wall of the top mast 4a on one side. Provided urging means 30 to the operating lever 28, the intermediate portion of the operating lever 28, the lever engaging grooves 33a of the guide holes 33, 33b, claim and configured to allow locking in any one of the grooves of 33c 2 The described rotary .

Images