JPH086409Y2 - Grounding wheel support device for mobile agricultural machinery - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention is a fertilizer application apparatus for applying liquid fertilizer or granular fertilizer to a field, or a grounding in a mobile agricultural machine equipped with a seeding device or other work equipment on a towing vehicle. Wheel support device.

(B) Conventional Technology Conventionally, a mobile agricultural machine in which a working unit is attached to a work frame having front and rear grounding wheels, the work frame is attached to a machine frame, and the machine frame is connected to and supported by a towing vehicle is already known. There is.

(C) Problems to be solved by the invention Since the working frame and the machine frame of the known mobile agricultural machine are integrated, the working part does not adapt to the unevenness of the field, and the working depth of the working part to the ground is low. There was a problem that was not uniform.

(D) Means for Solving the Problems In the present invention, a working portion is mounted on a working frame 20a having a grounding wheel, the working frame 20a is attached to the machine frame 2, and the machine frame 2 is connected to a towing vehicle. In the supported mobile agricultural machine, the machine frame 2
The swing frame 21b is interposed between the work frame 20a and the work frame 20a, and the base of the swing frame 21b is pivotally attached to the machine frame 2 so as to be vertically rotatable within a certain range, and the swing frame extending rearward.
A pivot shaft is provided at the tip of 21b to pivotally mount the work frame 20a so as to be vertically rotatable within a certain range, and ground wheels are arranged in front of and behind the pivot shaft, and between the front and rear ground wheels. The above-mentioned problems were solved by mounting the working unit.

(E) Action During work, the machine frame advances while being supported by the towing vehicle,
The swing frame tilts up and down around the base in accordance with the lifting and lowering of the work frame, and the work frame tilts up and down around the pivot shaft at the tip of the swing frame. Work on the field at regular intervals. When the machine frame is lifted to turn the machine after finishing the work of one stroke, the swing frame and the work frame have a constant rotation range, and thus the downward rotation is restricted and the lifting is substantially constant. The aircraft can be turned in the posture.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings, in which 1 is a fertilizer pump mounted on a machine frame 2, and a front frame 3 of the machine frame 2 is shown.
Although not shown, the transmission case 5 is connected to a towing vehicle, for example, a tractor, by a top link and left and right lower links, and a front portion thereof is driven by a PTO shaft of the towing vehicle.
(Or an electric motor) is attached, and the continuously variable transmission is composed of a drive split pulley 6, a driven split pulley 7 and a V belt 8 hung around them, and the sprocket 6b of the input shaft 6a of the drive split pulley 6 is the transmission. The sprocket 5a of the output shaft of the case 5 is driven via the chain 9, and one sprocket of the shaft (output shaft) 7a of the driven split pulley 7 is a chain 10.
The sprocket of the fertilizer application pump 1 is driven via the.

Reference numeral 11 denotes a fertilizer tank mounted on the machine casing 2, a suction hose connected to the discharge port thereof is connected to the suction port of the fertilizer application pump 1, and a plurality of hoses 13 connected to the discharge port of the fertilizer application pump 1 are , Is connected to a fertilizer pipe 15 whose angle and lateral spacing can be adjusted. This fertilizer pipe 15 ... Is attached to a bracket 2b hanging from a support frame 2a integral with the machine frame 2,
It is attached together with a sled 14, and a pair of left and right coulters 16 are pivotally supported by brackets 17 in front of the fertilizer application pipe 15,
Roller wheel with many spikes on the outer periphery at the lower part near the rear part
30 is rotatably supported and can be raised and lowered as described later.

Also, on the fulcrum shaft O of the bracket 2h at the rear of the machine frame 2,
A base of a swing frame 21b extending in the front-rear direction is pivotally attached, a pivot shaft 21a is provided at the tip of the swing frame 21b, and a work frame 20a is pivotally attached to the pivot shaft 21a. There is.
A front roller (grounding wheel) 18 and a rear roller (grounding wheel) 23 are arranged in front of and behind the pivot shaft 21a. In addition, the seeding device, which is a working unit, is a grooved disc 19
It is composed of a vacuum type seeding section 21, a soil cover 22, a seed tank 24 and the like, and is mounted on a working frame 20a located between the front and rear rollers 18 and 23. Transmission device A of the seeding section 21
Is a sprocket 25 that is supported on the transmission case B by bearings and is serration-fitted so that it can be inserted into and removed from the input shaft 25.
a and a reduction sprocket 25b, 25 that is pivotally supported by the transmission case B
c, 25d, 25e and chains a, b stretched in sequence on them, and the input shaft 25 is supported by a pair of right and left columns 2c, 2c standing on the rear portion of the machine frame 2 via bearings. The transmission case A has a sprocket 25a as shown in FIG.
Is fitted to the input shaft 25 with serrations and bolts 25
Attached detachably with a ', the lower part is loosely fitted to the tool bar 2d consisting of a rectangular tube extending outward from the machine frame 2 so that the lateral movement can be adjusted, and the stay 2f fixed by the bolt 2e,
It is detachably fastened with a connecting pin 2g. Input shaft 25
The sprocket 26a mounted in the middle of the is through a small sprocket 26b mounted on the intermediate shaft, a large sprocket 26c, a chain 26d stretched over them, two sprockets mounted on the front intermediate shaft 27, and chains 27a, 27b. It is driven by a drive sprocket 28 attached to the shaft 7a of the driven split pulley 7.

The seeding input shaft 21a of the seeding section 21 is a pivot shaft 21a of the work frame 20a.
The seeding input shaft 21a also supports the rear end of the swing frame 21b, and the front end of the swing frame 21b is attached to the bracket 2
A pin 21c, which is rotatably supported by a fulcrum shaft O on h, is integrally formed with a protrusion that is erected near the front of the swing frame 21b.
The rotation range is limited by the long hole 21d of the bracket 2h, and the pin 21d projecting on the plate 20a 'integrated with the work frame 20a has the rotation range limited by the long hole 21d of the swing frame 21b. The chain 21g is attached to one sprocket 21e attached to the fulcrum shaft O and the sprocket 21f attached to the seeding input shaft 21a.
The sprocket 25e and the other sprocket 25e attached to the fulcrum shaft O over the chain 21h.
It is designed to drive a.

Further, a rotation sensor is attached to the input shaft 6a of the drive split pulley 6.
32 is attached, the rotation sensor 31 is attached to the shaft 7a of the slave split pulley, and the cam 33 attached to the movable split pulley of the drive split pulley 6 is rotated by the control motor 34 to forcefully expand or contract the groove width. However, the cam 33 is provided with an angle sensor 35, and the rotation of the shaft 30a having a pair of left and right rolling wheels 30, 30 is detected by an actual vehicle speed detector 36 composed of a rotation sensor via a speed increasing device 30b.
The support rod 30f that is transmitted to the speed increasing device 30b is pivotally supported by the bracket 30c by the fulcrum shaft 30d, and the pin 30e penetrating to the rear portion of the support rod 30f limits the vertical rotation range by the long hole 30g of the bracket 30c. Since the supporting rod 30f is urged downward by the spring 30i attached to the rod 30h, if there is a difference in height between the left and right of the field scene, one of the wheel wheels 30 will normally come into contact with the ground, and The actual speed to ground can be detected accurately.

Further, on the operation panel 38, a fertilizer application rate (nitrogen content) setting dial 39, a fertilizer brand (nitrogen content rate) select dial 40, and a line spacing specification (delivery device (fertilization application pump 1 in this embodiment))
A selection dial 41, an alarm buzzer 42, and an alarm lamp 43 are provided, and the setting values of the setting dials are input to the microcomputer 37. From the input values, the rotation speed of the input shaft 6a of the continuously variable transmission and the output shaft 7a. The number of revolutions and the actual vehicle speed are calculated. As described above, when the fertilizer application amount and the fertilizer brand are selected based on the nitrogen amount, the operation can be easily performed even when different types of fertilizers are used.

In the above-mentioned mobile agricultural machine, a tractor is run in a cultivated field, and the PTO shaft of the tractor drives the input shaft 6 of the transmission case 5.
When a is driven, the output shaft 7a of the continuously variable transmission is shifted according to the detected values by the rolling wheels 30 and the actual vehicle speed detector 36, which drives the fertilizer pump 1 on the one hand and the transmission device A and the fulcrum shaft on the other hand. O, sprocket 2 mounted on seeding input shaft 21a
Since the seeding section 21 is driven via the 1f and the chains 21g and 21h, the fertilizer in the fertilizer tank 11 is fertilized into the soil from the fertilizer application tube 15 ..., and the seeds falling from the seeding section 21 form the groove cutting disk 19. The soil is sown in the ditch, the soil ring 22 covers the soil, and the rear roller 23 is crushed.

Then, the front roller 18 and the rear roller 23, which are separated from the seeding input shaft 21a by a substantially equal distance in the front and rear direction, roll while following the ground, and the work frame 20a accordingly swings up and down within a predetermined range about the seeding input shaft 21a. However, since the swing frame 21b swings up and down about the fulcrum axis O, the sowing section 21 follows well the inclination of the front and back of the field and the change in height, whereby the seeds are always kept at a substantially constant depth. Can be seeded.

Further, when the machine frame 2 is lifted by the lift arm of the tractor in the headland to complete the planting and sowing of one stroke and to rotate the machine body, the work frame 20a moves within a certain range with respect to the swing frame 21b. Since the swing frame 21b does not swing and swings only within a certain range with respect to the bracket 2h, the working machine does not change its posture largely.

Further, since the fulcrum shaft O and the seeding input shaft 21a are swing centers and support the sprocket that is a transmission wheel,
Smooth transmission can be performed even if the sowing section 21 tilts back and forth or moves up and down.

Furthermore, when traveling on the road or stored, the seeding device 20 is rotated upward about the input shaft 25, and this is connected to the support column 2c or the like, whereby the longitudinal length of the machine body can be shortened. When not fertilizing and only fertilizing, sowing device 20
Remove pin 2g and insert sprocket 25a into input shaft 25
It can be easily removed by pulling it out.

(G) Effect of the Invention As described above, the present invention attaches the working portion to the working frame 20a having the grounding wheel, attaches the working frame 20a to the machine frame 2, and connects the machine frame 2 to the towing vehicle. In the supported mobile agricultural machine,
A swing frame 21b is interposed between the machine frame 2 and the work frame 20a, and a base portion of the swing frame 21b is pivotally attached to the machine frame 2 so that the swing frame 21b can be vertically rotated within a certain range. The swing frame 21b is provided with a pivot shaft at the front end thereof so that the working frame 20a
Is pivoted vertically within a certain range, and the grounding wheels are arranged in front of and behind the pivot shaft, and the working part is mounted between the front and rear grounding wheels. Even if the working area is uneven or has unevenness, the working part is stably supported by the front and rear grounding wheels and moves up and down well following the field scene to keep the working depth in the field scene almost constant. Can be constant.

Further, when the working unit is raised to rotate the aircraft in a headland, the working frame 20a and the swing frame swing only within a limited fixed range, and the aircraft has a stable posture without hanging down. Can go around.

Furthermore, the pivot shaft can be used to support the ground wheel,
Even if the work frame 20a and the swing frame 21b swing, reliable transmission can be performed.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a side view of a fertilizer sowing machine, Fig. 2 (a) is a side view of a planting part,
(B) is a side view of the seeding part, FIG. 3 (a) is a perspective view of a main part, FIG. 3 (b) is a plan view of an upper connecting part, and FIG. 3 (c) is a plan view of a lower connecting part. Fig. 4 is a plan view of the vehicle speed detector, 5th.
The figure is a control system diagram. 1 ... fertilizer pump, 2 ... machine frame, 6 ... drive split pulley, 7 ... driven split pulley, 15 ... fertilizer pipe, 20 ... seeding device, 20a ... work frame, 21 ... seeding section, 21a ... Seeding input shaft, O ... fulcrum shaft, 21b ... Swing frame, 18 ... Front roller, 23 ... Rear roller, 25 ... Input shaft, A ... Transmission device, 30 ... Rolling wheel, 36 ... … Actual vehicle speed detector

Claims (1)

[Scope of utility model registration request] 1. A mobile agricultural machine in which a working unit is mounted on a working frame 20a having a grounding wheel, the working frame 20a is attached to a machine frame 2, and the machine frame 2 is connected to and supported by a towing vehicle. The swing frame 21b is interposed between the frame 2 and the work frame 20a, and the base of the swing frame 21b is pivotally attached to the machine frame 2 so as to be vertically rotatable within a certain range, and the swing frame extending rearward. The work frame 20a is provided by providing a pivot shaft at the tip of 21b.
Is rotatably pivoted up and down within a certain range, and grounding wheels are arranged in front of and behind the pivot shaft, and the working portion is mounted between the front and rear grounding wheels. Wheel support device.