JPS59358Y2 - Vibrating subsoiler drive device - Google Patents

Description

[Detailed description of the invention] This invention is a vibrating subsoiler that crushes hardened plowing soil at the bottom of the ridge by vibrating and towing the blade suspended underground, thereby increasing air permeability and water permeability. This relates to a drive device.

Conventionally, such a vibrating subsoiler has a blade suspended in the ground, and the upper part of the blade is pivoted to a frame so as to be able to swing back and forth in the direction of travel. The rotational power is transmitted to a cam mechanism that is pivotally supported on the frame through a flexible transmission shaft, and one end of an L-shaped crank whose base is pivotally supported on this frame is connected to the cam mechanism. The structure allows the body to vibrate back and forth via this crank.

Therefore, the underground blade vibrates back and forth due to the resistance of the soil, and this back and forth vibration hits the cam surface of the cam mechanism up and down via the crank, causing the cam to rotate slightly in the opposite direction to the drive direction. The drive from the PTO shaft and this reverse rotation are repeated, causing abnormal noise in the transmission section of the power agricultural machine due to the presence of backlash in the gear meshing section.
In addition, there was a drawback that the gears were damaged due to repeated impact.

The present invention was proposed in order to eliminate such drawbacks, and to obtain an improved vibrating subsoiler drive device that can absorb such impact force based on running resistance acting on the blade body. be.

Hereinafter, the configuration of the present invention will be described in detail with reference to the attached embodiment drawings.A cutting body 2 like a chisel having a sharp end is attached to the lower end of the blade body 1 made of a long and thin plate, and the blade body 2 is attached at the rear of this digging body 2. A bullet-shaped bullet body 3 is attached to the lower end of the blade body 1 with a chino 4, a contact plate 5 is attached to the front upper part of this blade body 1, and this blade is attached to the lower part of a mounting frame 6 having a shaft support 6a at the lower part. The upper part of the body 1 is attached, hitch pins 8, 8 are protruded from the lower end of the mast 7. A bracket (10) is attached to the inner lower end of the mounting frame 6 (bracket) with pivot supports 10a and 10b provided on the upper and lower sides, respectively. The blade body 1 is formed so that it can be rotated in a vertical plane along the frames 9, 9 around a pin shaft 11 on which the shaft supports 6a, 10b are inserted horizontally, and The drive shaft 12 provided in the longitudinal direction is connected to the bearing 13,
A plate cam 14 with an egg-shaped profile is attached to the rear end of this drive shaft 12, and the base of a crank 15 formed in an L shape is fitted into the upper shaft support 10a of the bracket 10. The crank 15 is pivoted by a pin shaft 16 so that it can rotate in a vertical plane parallel to the rotation plane of the blade 1, and a plate cam 14 is attached to the front end of the horizontal arm 15a of the crank 15. A roller 17 that can be rotated in contact with the frame is pivoted at right angles to the arm 15a, and a roller 18 is pivoted to the vertical arm 15b of the crank 15 so as to be able to rotate parallel to the pin shaft 16. The rotation of the plate cam 14 is prevented by keeping the contact plate 5 in constant contact with the roller 18 using the compression spring 20 interposed between the spring receiver 19 erected at the rear of the frame 9 and the upper end of the mounting frame 6. A cam mechanism 21 that swings the crank 15 up and down to swing the blade body 1 back and forth is formed, and the hitch pins 8, 8 are fitted into the lower link 22, which is pivotally connected to the rear lower part of the power agricultural machine. In addition, the upper part of the mast 7 is pivotally connected to a top link 23 pivotally connected to the rear upper part of this power agricultural machine, and the drive shaft 12 is rotationally driven via a flexible transmission shaft 24 connected to the PTO shaft of the power agricultural machine. In the vibrating subsoiler constructed as shown in FIG. The rear end of the drive shaft 12 and the front end of the drive shaft 12 are connected by an elastic joint 27, so that the rotational power of the power agricultural machine is transmitted to the cam mechanism 21 via the elastic joint 27.

This elastic shaft joint 27 is configured as shown in FIG. 2, for example.

In FIG. 2, an elastic body 30 made of an elastic material such as rubber and formed into a cylindrical or cylindrical shape as shown in the figure is interposed between mutually parallel disks 28 and 29.

The discs 28, 29 are installed so that the centers of the discs 28, 29 and the elastic body 30 are on a straight line, and the contact surface 30a of the elastic body 30 with the discs 28, 29 is subjected to baking treatment or the like. so that the elastic body 30 and each disc 28, 29 are integrated.

Furthermore, as shown in FIG. 3, the discs 28 and 29 have bolt holes 28 a , 28 a , 28 a ,
29a, 29a29a and nut loose fitting hole 28b
, 28 b , 28 b , 29 b , 29b, 2
9b and 9b alternately, and bolts 31 and 9b as shown in the figure.
. . . and nuts 32 are tightened so that the disk 28 and the elastic body 30 and the disk 29 and the elastic body 30 are integrated, respectively, and 28. The frictional resistance at the contact surface with 29 should be made sufficiently large.

The center portions of the discs 28 and 29 in such an elastic shaft joint 27 can be attached directly to the rear end of the input shaft 25 and the front end of the drive shaft 12, respectively, as shown in FIG. Flange portions are provided at the rear end of the input shaft 25 and the front end of the drive shaft 12, respectively, and the disc 2 is connected to the flange portions.
If 8.29 is attached with bolts or the like, the elastic shaft coupling 27 can be easily replaced.

Furthermore, although not shown in the drawings, such an elastic shaft joint 27 has an elastic body sandwiched between two disks, a bolt hole larger than the outer diameter of the bolt is drilled in this disk, and the elastic body is inserted into the elastic body. If a bolt is fastened between the two discs so as to sandwich the elastic body and the disc, the frictional resistance can be sufficiently increased without the need for seizure treatment or the like on the contact surface between the elastic body and the disc.

Although not shown, this elastic shaft joint 27 has a
A flange type in which a bolt fitted with a cylindrical elastic body is screwed onto one flange, and the elastic body fitted onto the head of the bolt is fitted into a bushing hole provided on the other flange. It can be constructed with a flexible shaft joint.

In the vibrating subsoiler drive device configured as described above, the power agricultural machine transmits rotational power such as the PTO shaft of the power agricultural machine to the input shaft 25 from the flexible transmission shaft 24 while pulling the blade 1. , the drive shaft 12 is rotationally driven in the direction of arrow B in the figure.

As the drive shaft 12 rotates, the blade 1 vibrates back and forth around the pin shaft 11 by the cam mechanism 21, thereby crushing the tiller in the field.

In the present invention, which operates in this way, when the blade 1 comes into contact with a particularly hard plowing plate or a rock mass and a large running resistance is applied to the blade 1, this impact force is absorbed by the roller 17 and the cam of the plate cam 14. The surface is strongly pressed in a direction opposite to the normal direction of rotation, and the drive shaft 12 is instantaneously reversely rotated in the direction of arrow C in the figure.

However, since the front end of the drive shaft 12 is connected to the rear end of the input shaft 25 via an elastic joint 27, the impact force in the direction opposite to the normal rotation direction is absorbed by the elastic body of the elastic joint 27. It is absorbed and relaxed and is not transmitted to the PTO shaft of powered agricultural machinery.

As described above, the present invention protects the power agricultural machine by absorbing and alleviating the running resistance acting on the blade body using the elastic shaft coupling, and has great practical effects such as no abnormal noises.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view with the right frame of the vibrating subsoiler removed, Fig. 2 is a vertical sectional view of the main part, and Fig. 3 is a view taken in the direction of arrow A of the same. It is. Explanation of symbols 1...Blade body, 21...Cam mechanism, 12...Drive shaft, 25...Input shaft, 27... Elastic shaft joint.

Claims (1)

[Scope of utility model registration request] In a vibrating subsoiler in which a blade 1 suspended underground is towed while being vibrated by a cam mechanism 21 driven by the rotational power of a power agricultural machine, a drive shaft 12 that drives this cam mechanism 21 and the above-mentioned A driving device for a vibrating subsoiler, characterized in that an elastic shaft coupling 27 having an elastic body interposed therebetween is provided between an input shaft 25 for inputting rotational power of a power agricultural machine.