JP4480786B1 - Automatic height support device for cultivator unit - Google Patents

Abstract

An automatic elevation support device for a cultivator unit capable of separately controlling a spring strength and a lower limit position of a cultivator main body.
In a cultivator unit in which an elastic support device is installed between the central bone beams of the cultivator body, the elastic support device is configured as follows. That is, a plurality of stages of spring receiving and engaging portions are provided in the axial direction near the lower end, and a spiral spring is externally attached to a spring guide rod provided with a plurality of stages of stopper engaging portions in the axial direction near the upper end. The lower end of the spring guide rod is pivotally attached to the central beam of the cultivator body. The upper end of the spring guide bar protrudes upward from the base frame so that the stopper attached to an arbitrary stopper engaging portion can be locked to the upper surface of the base frame, and the lower end of the spring guide bar is arbitrarily The lower end of the spiral spring can be locked to the spring receiver locking portion.
[Selection] Figure 2

Description

  The present invention relates to an automatic height support device for a cultivator unit used by being attached to a bar to be pulled by a towing vehicle such as a tractor.

  A plurality of cultivator units are installed along the longitudinal direction of the horizontal bar to be pulled by the tractor, and each unit of the cultivator device for plowing a wide field with a predetermined horizontal width has a parallel link to the base frame attached to the tow bar. The cultivator body is pivotably connected to the base frame, and a resilient high and low support device is installed between the base frame and the central beam of the cultivator body, and the ground is cultivated with deep plow members extending below the cultivator body. is doing.

The conventional cultivator unit elastically supports the cultivator body frame by engaging both ends of a spiral spring of a predetermined tension with the base frame and the cultivator body.
However, since the tire part of the tractor sinks due to its own weight, the plurality of cultivator units mounted along the axial direction of the tow bar have uneven groove heights between the tire part and the other parts. There was a problem that hindered deep plowing of cocoons.
In such a case, the spring strength of the cultivator unit corresponding to the tractor tire portion may be increased in order to make the working depth of the claw of the cultivator unit between the ribs equal. However, the amount to be increased differs depending on the weight of the tractor and the hardness of the soil of the field, so it is necessary to prepare various springs and change them each time, and the adjustment work becomes complicated.

On the other hand, this type of automatic height support device (mechanism) has a structure in which the tractor tire and the cultivator gauge wheel come close to each other when the tractor lower link is lifted, and the length of the tractor lower link is Depends on tractor model / brand.
Since the cultivator operation must be applied to the crop row as accurately as possible, the tractor and the cultivator must be as close as possible to each other because the cultivator mounted on the rear must be made difficult to swing from side to side by operating the tractor handle. Are desirable. For this reason, conventionally, when the lower link of the tractor is lifted, the mounting position of the lower link is moved back and forth so that the tractor tire and the gauge wheel of the cultivator are in a positional relationship immediately before contact. Therefore, when the cultivator claw is displaced downward, there is a problem that the gauge wheel attached to the front part of the central beam of the cultivator main body comes into contact with the tire of the tractor.

Therefore, the object of the present invention is to change the spring strength and the tip position of the gauge wheel attached to the front of the central beam of the cultivator body toward the front of the central bone beam without replacing the helical spring. An object of the present invention is to provide an automatic height support device for a cultivator unit that can be controlled separately.

In order to achieve the above-mentioned object, the cultivator automatic height supporting device of the present invention connects a cultivator body to a base frame attached to a tractor tow bar so as to be swingable via a parallel link, and the base frame and the cultivator are connected. as well as bridged the elastically supporting device between the body of Chukotsu beam, in cultivators beta unit fitted with a gauge foil extending forwardly of the middle bone beam to the front of the middle bones beam, the elastic supporting device, near the lower end A multi-stage spring support locking part is provided in the axial direction, and a spiral spring is externally attached to a spring guide bar provided with a multi-stage stopper locking part in the axial direction near the upper end. Attached to the middle beam of the beta body, the upper end of the spring guide rod protrudes above the base frame, and is attached to any stopper locking part. The stopper engaged thereby on the upper surface of the base frame, the middle can control the position of the tip of the gauge wheel mounted forwardly of the middle bone beam to the front of the bone beam and the spring guide rod lower end of the It is characterized in that the lower end of the spiral spring can be locked to an arbitrary spring receiving locking portion.

Since the present invention is configured as described above, by selecting a spring receiving locking portion at an arbitrary position from among the multiple stages of spring receiving locking portions provided in the vicinity of the lower end of the spring guide rod, the lower end of the spring is locked. By changing the spring strength of the automatic height support device, the working depth of the claw of the cultivator unit can be adjusted.
On the other hand, the lower limit position of the cultivator main body is changed by selecting a stopper locking portion at an arbitrary position from the plurality of stopper locking portions provided near the upper end of the spring guide rod and locking it to the upper surface of the base frame. The contact and collision of the tractor tire and the gauge wheel of the cultivator unit can be avoided while keeping the tractor and the tractor bar of the cultivator main body close to each other.
Thus, the spring strength of the automatic height support device and the lower limit position of the cultivator unit can be controlled separately. As a result, the spring strength and the cultivator unit lower limit position can be controlled together.

Side view of the cultivator unit of the present invention attached to a tow bar Exploded view of cultivator unit Usage explanation of cultivator unit Action diagram of cultivator unit Action diagram of cultivator unit Action diagram of cultivator unit Action diagram of cultivator unit

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 to 3, the cultivator unit 1 of the present invention is connected to a base frame 3 fixed to a traction bar 2 of a tractor 18 and to the base frame 3 through a parallel link 4 so as to be swingable. A cultivator main body 5 and an automatic height support device 6 for elastically supporting the cultivator main body 5 on the base frame 3 are provided.
The cultivator main body 5 of the cultivator unit 1 illustrated in the figure has a tilling claw member 5b coupled to the rear portion of the middle bone beam 5a and a gauge foil 5c attached to the front portion.
The cultivator main body 5 of the illustrated embodiment has a plurality of attachment ports 5d for mounting other work attachments such as a weeding tine on the middle bone beam 5a.

In the cultivator unit 1 having the above-described configuration, the automatic height support device 6 according to the present invention includes a plurality of stages (upper and lower portions) of spring receiver locking portions 7a in the axial direction near the lower end, as shown in an exploded view in FIG. to form 7b at predetermined intervals, loosely fitted to the upper end near the axis direction stopper engaging portion 8a of the plurality of stages (vertical plural locations), the helical spring 10 a to the outside around the spring guide rod 9 forming the 8b at predetermined intervals - in terms of equipped with, the lower end of the spring guide rod 9 which is engaged the lower end of the helical spring 10 a and a spring stopper 11 is mounted in the spring receiving engaging portion 7a or 7b of the cultivators beta body 5 Chukotsu beam One of the stoppers formed near the upper end of the spring guide bar 9 which is pivotally attached to 5a and penetrates the opening 12 formed on the upper side of the base frame 3 and protrudes upward. Person in charge The section 8a or 8b wearing the lower limit stopper 13 detachably has a configuration where engaged to the upper side of the base frame 3.

  In the embodiment shown in the drawing, the spring receiving and locking portions provided in the axial direction near the lower end of the spring guide bar 9 and the stopper locking portions provided in the axial direction near the upper end are set at two locations, respectively, but the present invention is not limited to this. What is necessary is just two or more. As the number of setting points increases or the setting interval decreases, the spring strength and height adjustment of the automatic height support device 6 can be finely controlled over a wide range.

As shown in FIG. 1, the cultivator unit 1 having the above-described configuration is coupled with a plurality of units along the longitudinal direction of an elongated tow bar 2 orthogonal to the cultivator unit 1 so as to correspond to the furrows of the field. Each cultivator unit 1 is firmly fixed to the traction bar 2 so that the traction bar 2 is sandwiched between the engaging portion 14 (see FIG. 2) provided on the upper surface of the base frame 3 and the upper coupling member 15 (see FIG. 1). Is done.
The tow bar 2 integrally has upper and lower connecting arms 16 and 17 extending forward at the center.

  Thus, the tow bar 2 in which a plurality of cultivator units 1 are coupled along the longitudinal direction is attached to the three-point lower links 19a, 19b of the tractor 18 with the connecting portions of the upper and lower connecting arms 16, 17 as shown in FIG. Used.

Next, the operation of the cultivator unit automatic height support device according to the present invention will be described with reference to the drawings.
FIG. 1 shows that the lower end of the spiral spring 10a attached to the spring guide rod 9 is engaged with the lowermost spring receiving engagement portion 7a of the spring guide rod 9 via the spring receiver 10b and the spring stopper 11, and the spring guide rod 9 The lower limit stopper 13 attached to the uppermost stopper locking portion 8a is locked to the upper surface of the base frame 3.
From this state, as shown in FIG. 4, when the spring stopper 11 is replaced with the upper spring bearing locking portion 7 b of the spring guide rod 9, and the spring bearing 10 b at the lower end of the spiral spring 10 a is locked to the locking portion 7 b, The cultivator unit 1 increases the spring strength of the automatic height support device 6 while maintaining the posture shown in FIG.
Accordingly, by operating only the automatic height support device of the cultivator unit 1 corresponding to the tire 20 of the tractor 18 as described above to enhance the spring strength, the working depth of the claw member 5b of the cultivator unit group is made equal. Can be controlled.

On the other hand, when the traction bar 2 is lifted by the lower links 19a, 19b of the tractor 18 as shown by the broken lines in FIGS. 3 and 6, the gauge wheel 5c of the cultivator unit 1 may come into contact with the tire 20 of the tractor 18. As shown in FIGS. 5 and 6, when the lower limit stopper 13 of the spring guide bar 9 is replaced with the lower stopper locking portion 8b and locked to the upper surface of the base frame 3, the cultivator main body 5 becomes the helical spring 10a. Accordingly, the gauge wheel 5c and the tire 20 are prevented from interfering with each other.
FIG. 6 shows the displacement of the cultivator unit 1. By changing the lower limit stopper 13 from the upper stopper locking portion 8 a (broken line) of the spring guide rod 9 to the lower stopper locking portion 8 b, the cultivator unit 1 is changed. Moves backward from the solid line position to the broken line position without changing the spring strength of the spiral spring 10a.

  The automatic height support device of the present invention can perform the spring strength control (changing the mounting position of the spring stopper 11) and the longitudinal position control of the cultivator unit 1 (changing the mounting of the lower limit stopper 13) separately and independently. Therefore, as shown in FIG. 7, the spring stopper 11 can be replaced with the upper spring receiving latching portion 7b with the cultivator unit 1 displaced rearward (FIG. 5) to increase the spring strength. .

  The automatic height support device for a cultivator unit according to the present invention can separately control the spring strength and the front-rear posture of the cultivator unit without replacing the spring, especially when used as a cultivator unit corresponding to the tire portion of a tractor. Various actions are obtained, which is beneficial for agricultural work.

DESCRIPTION OF SYMBOLS 1 ... Cultivator unit 2 ... Tow bar 3 ... Base frame 4 ... Parallel link 5 ... Cultivator main body 5a ... Center bone beam 5b ... Claw member 5c ... Gauge wheel 5d ... Attachment attachment port 6 ... Automatic height support device 7a, 7b ... Spring receiver locking portions 8a, 8b ... stopper locking portion 9 ... spring guide rod 10a ... spiral spring 10b ... spring receiver 11 ... spring stopper 12 ... opening 13 ... lower limit stopper 14 ... engaging portion 15 ... coupling members 16, 17 ... Connecting arm 18 ... Tractors 19a, 19b ... Lower link 20 ... Tire

Claims (1)

The cultivator body is pivotally connected to the base frame attached to the tractor tow bar via a parallel link, and an elastic support device is installed between the base frame and the central bone beam of the cultivator main body . In the cultivator unit in which a gauge wheel extending toward the front of the middle beam is attached to the front part, the elastic support device is provided with a plurality of stages of spring receiving engagement parts in the axial direction near the lower end, and the axial direction near the upper end A spiral spring is externally attached to a spring guide rod provided with a plurality of stopper locking portions on the same, and the lower end of the spring guide rod is pivotally attached to the central beam of the cultivator body, and the upper end of the spring guide rod is attached to the base. is projected upward of the frame, by engaging the stopper mounted on any stopper engaging portion on the upper surface of the base frame, said the front of the middle bone beams Can control the position of the tip of the gauge wheel mounted forwardly of bone beam and, that the lower end of the helical spring has to be locked in any spring receiving engaging portion of the spring guide rod lower end Automatic height support device for cultivator unit

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