JPS6115696Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a support device for a muzzle mower that can follow the surface of a field.

The muzzle mower has a three-point link attachment section at its upper center, and is attached to a muzzle three-point link mechanism provided at the front of the tractor.

The mower runs while touching the field surface so that it can cut the grass in a shorter length of time, so the Mitsudoh mower uses a hanging type, and the rear mower uses a cantilever type that allows it to swing from side to side to avoid unevenness on the field surface. It is configured so that even if there is a problem, you can follow it and work.

As mentioned above, since the front mower has a three-point link mounting section in the center, it is difficult to use a structure like a mid mower or a rear mower. Therefore, it is possible to follow the mower by extending and retracting the hydraulic lift rod of the front three-point linkage mechanism, but since this lift rod is connected to the lower link and is separated from the front mower, accurate tracking is difficult. Therefore, there is a long-awaited need for a new, more accurate tracking mechanism.

The present invention can meet these expectations, and provides a grass mower in which a support attached to a three-point linkage mechanism is provided with a cylindrical shaft portion that supports an input shaft in the front-rear direction, and the cylindrical shaft portion has a cutting portion. A muzzle-mounted mower with a simple structure that can accurately and quickly follow the field surface by supporting the mower body in a suspended manner so that it can swing left and right around the input shaft. The purpose is to provide a support device for.

The features of this invention to achieve this purpose are that a muzzle mower is attached to the front of the tractor via a link mechanism so that it can be raised and lowered freely, and the power of the tractor is connected to the input shaft of the muzzle mower. In a device capable of transmission, a support body is attached to the front part of the tractor via a three-point link mechanism, a cylindrical shaft part that supports the input shaft in the front and rear direction is formed on this support body, and the cylinder shaft part supports the input shaft in the longitudinal direction. The mower body is supported in a suspended manner by rotatably fitting the fitting part provided approximately in the center of the upper part of the mower body which has a cutting part on the outer periphery in the front, back, left and right, and transmits power from the input shaft to the mower body. The point is that it is configured to be communicable.

Embodiments of the present invention will be described below with reference to the drawings.

A front mower 1 shown in FIGS. 1 to 3 is mounted on the front part of a tractor 3 via a front three-point linkage mechanism 2 so as to be movable up and down.

The front three-point linkage mechanism 2 has a pair of left and right lower links 5 and a top link 6 pivoted on a support frame 4 fixed to the tractor 3, and a hydraulic lift mechanism provided between the upper part of the support frame 4 and the lower link 5. Lift rod (not shown)
Accordingly, the lower link 5 is configured to be able to swing up and down.

A front PTO shaft 7 protrudes from the front of the tractor 3 and is connected to one end of a universal joint 8, and the other end of the universal joint 8 is connected to an input shaft 11 of a muzzle mower 1. ing.

The front mower 1 has a support body 12 and a mower body 13. The support body 12 is formed by welding or integrally forming a cylindrical body (cylindrical shaft part) 15 on the front surface of a triangular body 14, and the input shaft 11 is formed by welding or integrally forming a cylindrical body (cylinder shaft part) 15 on the front surface of a triangular body 14.
It penetrates in the front-rear direction and is rotatably supported via a bearing 16. 17 is an oil seal.

A bracket 18 for connecting the lower link 5 is provided at the left and right lower portions of the rear surface of the triangular body 14, and a mounting base 19 for connecting the top link 6 is provided at the upper portion of the rear surface, forming a three-point link mounting portion.

A fitting body 22 is rotatably fitted to the outer periphery of the cylindrical body 15 via a bearing 21 . Since the cylindrical body 15 is coaxial with the input shaft 11, the fitting body 22 can rotate around the input shaft 11. This fitting body 22 is fixed to the upper surface of the upper cover 24 via a fixing plate 23, and forms a part of the mower main body 13.

Reference numeral 25 denotes a guide member provided on the front surface of the triangular body 14, which has a circular arc groove 26 centered on the input shaft 11, and an L-shaped stopper implanted in the circular arc groove 26 on the outer peripheral surface of the fitting body 22. One end of 27 is inserted. This stopper 27 is relatively movable within the arcuate groove 26 and regulates the rotation angle of the fitting body 22.

The tip of the input shaft 11 protrudes forward from the cylindrical body 15 and is provided with a pulley 28.
Power can be transmitted to the transmission shaft 30 via 9.

The mower main body 13 has two sets of cutting bodies 32, 32, and the cutting parts 34 are symmetrical. Each of the reaping bodies 32, 32 is rotatably supported around a vertical shaft 36 protruding downward from a gear case 35 provided on the lower surface of the upper cover 24. 37 is a bearing case fixed to the gear case 35, and the reaping body 32 is supported by this bearing case 37 via a bearing 38.
The lower end of the vertical shaft 36, which is also supported by the bearing case 37 via a bearing 39, is connected to the reaping body 32. Reference numeral 40 denotes a cutter blade protruding from the lower part of the cutting body 32.

The gear case 35 is provided with a horizontal shaft 42, and bevel gears 43 and 44 are provided at both ends of the horizontal shaft 42, respectively, and a bevel gear 45 is provided at the upper end of the vertical shaft 36 that drives the left and right reaping bodies 32 and 33. ，
It meshes with 46. This horizontal axis 42 intersects with the transmission shaft 30, and a pair of bevel gears 47, 4
The power from the input shaft 11 is transmitted through the input shaft 8 .

A protective cover 49 surrounds the belt 29 and is attached to the upper cover 24, the upper part of which is slidably fitted to the end of the cylindrical body 15.

50 is a reinforcing and connecting member for the upper cover 24, which includes the front cover 24a forming the upper cover 24;
The middle cover 24b and the left and right rear covers 24c are connected. A peripheral edge cover 51 made of rubber or cloth is provided vertically at a constant height from the front side to both sides of the upper cover 24, and surrounds the cutting part 34 to allow grass 52 to enter and to prevent the grass cuttings from scattering. There is.

The muzzle mower 1 configured as described above operates the muzzle three-point linkage mechanism 2 to lower the mowers 32, 32 until they come into contact with the field surface 53.
The grass 52 is cut and carried with the grass 2 and 32 in contact with the ground. If the field surface 53 is uneven and one of the left and right sides of the reaping part 34 moves up and down due to the unevenness, or if the tractor 3 itself is tilted, the mower body 13 and the support body 12 will rotate relative to each other about the input shaft 11. death,
The mower main body 13 swings left and right with respect to the tractor 3, and the left and right sides of the cutting section 34 cut grass under substantially the same conditions.

The forward and backward tracking of the muzzle mower 1 is performed by detecting the load applied to the lower link 5 in a hydraulic control valve that supplies pressure oil to the hydraulic lift rod.

According to the present invention described in detail above, a cylindrical shaft portion is provided on the support body attached via a three-point link mechanism, and the input shaft is supported in the front and rear direction on this cylindrical shaft portion, and the mower body can be freely rotated. Since the mower body is supported by a suspension, the mower body can swing left and right around the input shaft, making it possible to mow while following the unevenness of the field surface. The grip support is carried out approximately in the center of the upper front, back, left and right, so it can swing smoothly without twisting, and the cylindrical shaft can be used both to support the input shaft and the mower body. Since the support body is attached to the three-point link mechanism, the main body of the mower can be brought closer to the tractor when raised, maintenance can be facilitated, and the function of the three-point link mechanism can be enjoyed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially sectional front view, FIG. 2 is a plan view, and FIG. 3 is a sectional side view. DESCRIPTION OF SYMBOLS 1...Front-mounted mower, 2...Front-mounted three-point link mechanism, 3...Tractor, 11...Input shaft, 12...
Support body, 13... Mower body, 15... Cylindrical body,
22... Fitting body, 34... Reaping part, 53... Field surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A tractor in which a muzzle mower is attached to the front of the tractor via a link mechanism so that it can be raised and lowered freely, and the power of the tractor can be transmitted to the input shaft of the muzzle mower. A grass mower, in which a support body is attached to the front part of the lawn mower via a three-point link mechanism, a cylindrical shaft part that supports the input shaft in the front and back direction is formed on the support body, and a cutting part is provided on the outer periphery of the cylinder shaft part. A fitting part provided at approximately the center of the upper part of the main body in the front, rear, left, and right directions is rotatably fitted to support the mower main body in a suspended manner, so that power can be transmitted from the input shaft to the mower main body. Support device for muzzleloader.