KR100820730B1 - Safety apparatus for folding or unfolding the harrow - Google Patents

Abstract

A safety apparatus of a foldable harrow is provided to prevent damage of the harrow since an outside harrow is folded in a rear direction of a moving direction of the tractor by the obstacles or overload even in case that the tractor drives back. A safety apparatus of a foldable harrow includes: a center harrow plate(41); a pair of outside harrow plates(42) connected to the center harrow plate by a connection arm(50); a first hinge part(51) formed on the end of the center harrow plate side of the connection arm so that the outside harrow plate pivots in a tractor direction; a second hinge part(60) formed on the end of the outside harrow plate side of the connection arm so that the outside harrow plate pivots in back and forth directions of the tractor; and a safety bolt(52) installed on a safety plate(53) fixed to one side of the connection arm and cut when overload is applied to the outside harrow plate.

Description

Safety Apparatus for Folding or Unfolding the Harrow}

1 is a perspective view of the overall state in which the linkage device according to the present invention is installed;

Figure 2 is an enlarged perspective view of the harrow safety device according to the present invention

Figure 3 is a state in which the safety device is operated during the flat working in the present invention

Figure 4 is a state in which the safety device is operated during the drag operation in the present invention

Figure 5 is a state in which the safety device is operated when pushing the soil in the present invention

<Explanation of symbols for the main parts of the drawings>

A: Tractor B: Rotorbator

10: harrow mounting structure 20: lifting rod

30: lifting cylinder 35: linkage device

40: harrow board 41: central harrow board

42, 43: outer harrow plate 42 ': harrow blade

42 “: Harrow blade connecting rod 44: 1st bracket

45: second bracket 50: connection arm

51: first hinge portion 52: safety bolt

53: Safety Plate 54: Stopper

55: stopper bracket 60: second hinge portion

61: hinge bracket 62: chain

The present invention relates to a safety device for a tractor harrow, and more particularly, when the tractor is moving forward and flattening and pulling, as well as when the tractor is backing and pushing the soil, the harrow board is in contact with obstacles during the operation. When hit or overload is applied to the safety device of the tractor harrow to be folded to the rear of the tractor in the forward direction of the tractor while cutting the safety member to protect the harrow plate.

In general, the tractor harrow is mounted to the rear of the tractor is used to flatten Munon, etc., the outer side to the left and right sides of the center harrow plate and the center harrow plate in order to further widen the Munnon flat work, etc. Wide harrows with additional harrow plates are widely used. Such a wide harrow is a folding harrowboard having a structure of folding an outer harrow installed on the left and right sides of the center harrow to avoid obstacles when moving a road or the like.

Since the wider harrow is wider, the outer harrow plate installed on the left and right sides of the center harrow plate has a large angle with respect to the ground, and there is a problem in that it is damaged due to an overloading action when a large amount of soil is moved at a time. In addition, even if the harrow plate is laid flat on the ground and the Munnon flattening operation, if the harrow plate is inadvertently hit by obstacles such as ricefields, the harrow plate is forcibly dragged and damaged by the tractor.

In this way, a method of preventing damage to the outer harrow by installing a safety member at the portion where the central harrow plate and the outer harrow plate are connected to the outer harrow plate of the harrow has been proposed by the Patent Registration No. 323575 filed by the present applicant. .

The safety device of the harrow according to the above invention is connected to the outer harrow plate at both ends of the center harrow plate by a connecting arm and a safety plate fixed by a safety bolt is installed on the connecting arm, and the safety bolt is applied when the overload is applied to the outer harrow plate. It is to be able to protect the outer harrow plate while cutting.

However, the safety device according to the above-described conventional invention is suitable for using the harrow to flatten and pull the tractor by moving the tractor forward, and when the tractor is pushed back to the soil, it hits an obstacle or overloads on the outer harrow. At the time of operation, there was a problem that the harrow plate is not applied at all.

The present invention has been researched and developed in order to solve the conventional problems as described above, the purpose of which is to retract the tractor not only to advance the tractor for the flat work of the harrow for the tractor, the soil pulling work, but also to push the soil If the outer harrow plate hits an obstacle or the safety bolt is cut when the overload is applied, the tractor harrow is folded backward in the traveling direction of the tractor to protect the outer harrow plate from overload. To provide a safety device.

The present invention for achieving the above object, in the harrow safety device of the harrow plate consisting of a pair of left and right outer harrow plate coupled by the center harrow plate and the connecting arm, the side of the center harrow plate side of the connecting arm At the end, when the tractor is advanced with the harrow plate lying on the ground relative to the ground, a first hinge part is formed so that the outer harrow plate can rotate in the direction of the tractor, and at the end of the outer harrow plate side of the connecting arm. When the tractor is moved forward or backward with the harrow plate set relative to the ground, the outer harrow plate forms a second hinge portion that can rotate in the front and rear direction of the tractor, and the connecting arm includes the center harrow plate or the When the outer harrowboard is bent between the outer harrowboard in the opposite direction to the tractor running about the second hinge portion, The end of the outer harrow plate has a structure such that the space is formed so as not to interfere with the other parts of the harrow, the safety bolt is fixed to one side of the connecting arm and the safety bolt cut when the overload is applied to the outer harrow plate Characterized in that provided.

In addition, the present invention is characterized in that the second hinge portion is formed on a hinge bracket provided on the hedge blade connecting rod of the outer harrow plate.

In addition, the present invention, the hinge bracket is formed on both sides vertically so as to have an inner space to the hinge arm by fitting the connecting arm to the inner space of the hinge bracket, one side of both sides of the connection hinge bracket is the safety bolt It is characterized in that formed extending from the other surface to be fixed by.

In addition, the present invention is characterized in that the surface formed on one side of the hinge bracket extending from the other surface is formed on the rear side (the front side closer to the tractor) of the connecting arm.

In addition, the present invention is characterized in that the safety bolt is formed in a portion of the portion relatively weak strength compared to the harrow plate.

In addition, the present invention, the safety plate is characterized in that the chain is fixed and fixed to the hinge bracket.

In addition, the present invention, both sides of the center harrow plate When the outer harrow plate is unfolded at the end, a stopper is provided to contact the safety plate to limit the spread out more than the center harrow plate horizontally, the stopper is formed by the stopper bracket at both ends of the center harrow plate Characterized in that the bolt is installed on the bracket.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view of the entire state of installing the harrow safety device according to the present invention, Figure 2 is an enlarged perspective view of the harrow safety device according to the present invention.

As shown in Figure 1, the harrow safety device according to the present invention, the harrow mounting structure 10 connected to the transverse shaft 10 of the rotor bay (B) detachably installed at the rear of the tractor (A), and A plurality of lifting rods 20, one end of which is hinged up and down to the left and right sides of the harrow mounting structure 10, and one end thereof to the center portion of the harrow mounting structure 10 to pivot up and down. Combining the lifting cylinder 30, the lifting rod 20 and the other end of the lifting cylinder 30 is composed of a first bracket 44 and the second bracket 45 coupled to the harrow plate 40 In addition, the harrow plate 40 has a center harrow plate 41 and a pair of outer harrow plates 42 and 43 on the left and right sides of the center harrow plate 41. The pair of outer harrow plates 42 and 43 are hinged by a connecting arm 50.

The outer harrow plates 42 and 43 are connected to the center of the first hinge portion 51 of the connecting arm 50 by the linkage 35. The central harrow plate 41 is hinged so as to be foldable in the front-rear direction, and the outer harrow plates 42 and 43 are connected to the ends of the outer harrow plates 42 and 43 of the connecting arm 50. A second hinge portion 60 is formed to rotate in a direction intersecting with a direction rotated by the first hinge portion.

Referring to Figure 2 in detail the safety device according to the present invention. In FIG. 2, the outer harrow plate 42 coupled to the left side of the center harrow plate 41 is illustrated, but the outer harrow plate 43 coupled to the right side of the center harrow plate 41 is also the same as that of FIG. 2. It is structured.

As shown in FIG. 2, the central harrow plate 41 and the outer harrow plate 42 are coupled by a connecting arm 50, and the connecting arm 50 is connected to the outer harrow at the end of the central harrow plate side. The plate 42 is hinged about the first hinge portion 51 so as to rotate in the tractor A direction. Inward to the upper end of the first hinge portion 51 There is a protruding part, which is a link device coupling part 36 coupled to the link device 35, and the link device coupling part 36 is extended and contracted by the expansion and contraction operation of the lifting cylinder 30 to the outer side. The harrow plate 42, 43 is a part which is hinged by a link device 35 and a pin or bolt to fold in the front and rear direction of the tractor.

In addition, second hinge portions 60 are formed at both end portions of the connecting arm 50 so as to rotate in a direction intersecting with a direction in which the first hinge portion 51 rotates about the second hinge portion. Branch portion 60 is formed in the hinge bracket 61 provided on the upper portion of the surface of the outer harrow plate 42 intersecting the extending direction of the blade 41 'in the blade joint 42 ″. The hinge bracket 61 is vertically formed on both sides of the hinge bracket 61 so as to hinge the connecting arm 50 to the inner space of the hinge bracket 61 so that the connecting arm 50 is the second hinge part. It is structured to rotate around 60.

Since the first hinge portion 51 and the second hinge portion 60 need only be rotatably coupled such as hinge shaft coupling or pin coupling or bolt coupling, various implementations are possible.

On both sides of the hinge bracket 51, the rear side (the side closer to the tractor is the front side) It is formed extending from the other side to be fixed by the safety bolt 52.

In addition, the connecting arm 50 has the outer harrow plate 42 between the center harrow plate 41 or the outer harrow plate 42 with respect to the second hinge portion 60 of the tractor A. The inner side of the outer harrow plate 42 when bent in the opposite direction of travel The structure is formed so that the end portion does not interfere with other parts of the harrow, the coupling hole of the safety plate 53 and the connection arm in a state in which the safety plate 53 on the one side of the connection arm 50 The safety bolt 52 is inserted into one surface of the hinge bracket 61 and fastened with a nut by passing through a through hole formed in a specific portion of the 50. In this case, the safety bolt 52 is a safety plate 52, The connecting arm 50, the hinge bracket 61 in order to fasten the nut is fixedly coupled.

The safety bolt 52 is cut when an overload is applied to the outer harrow plate 42, a portion thereof, for example, to form a groove in the lower end of the bolt head, such that the relative strength of the harrow plate Vulnerable parts are formed.

In addition, the safety plate 53 is connected and fixed to the chain 62 fixed to the hinge bracket 61, as described above, the safety plate 53 is connected to the chain 62 fixed to the hinge bracket 61. The safety bolt 52 is cut so that the safety plate 53 is connected to the chain 62 fixed to the hinge bracket 61 even if the safety plate 53 is separated from the connection arm 50. .

In addition, when the outer harrow plate 42 is unfolded by the linkage 35 at both end portions of the center harrow plate 41, the stopper may be prevented from being unfolded more than horizontally with the center harrow plate 41. 54 is formed, the stopper 54 abuts against the safety plate 53 so that when the outer harrow plate 42 is unfolded by the link device 35, the stopper 54 is at least horizontal with the central harrow plate 41. Restrict the expansion. The stopper 54 is a bolt installed on the stopper bracket 55 by forming stopper brackets 55 at both ends of the central harrow plate, but the outer hover plate (B) is brought into contact with the safety plate 53. Any structure may be used as long as 42 is limited by the linkage 35 when it is unfolded above the central harrow plate 41.

Hereinafter, the harrow safety device according to the present invention operates when the outer harrow plates 42 and 43 hit an obstacle or an overload is applied in each work process of the tractor harrow (flat work, drag work, and push work). The process of doing this is as follows.

(1) Operation process of safety device during flat work

The tractor harrow lays the harrow plate 40 relative to the ground and advances the tractor A to perform flattening of the munon. During the flattening of the munon, the outer harrow plate 42 or / and 43 When an obstacle is hit or an overload is applied, the outer harrow plate 42 or / and 43 and the connecting arm 50 on which the overload is applied are simultaneously formed at both ends of the central harrow plate 41. Try to rotate the tractor back toward the tractor. In this case, the safety plate 53 fixed to the connection arm 50 by the safety bolt 52 is caught by the stopper 54 formed at both ends of the center harrow plate 41 so that it cannot be rotated backwards. The plate 42 or / and 43 cannot be rotated backwards, but when the rotational force due to the overload applied to the outer harrow plate 42 or / and 43 is greater than the cutting limit load of the safety bolt 52 The safety bolt 52 holding the safety plate 53 is cut so that the safety plate 53 fixed by the safety bolt 52 is separated from the connecting arm, so that the stopper 54 is no longer provided. Since it is not possible to restrict the overloaded outer harrow plate 42 or / and 43 from rotating backward, the overloaded outer harrow plate 42 or / and 43 is rearward. Rotate with the outer harrow plate (42 or / And 43) can be prevented.

(2) Operation process of the safety device when dragging soil

Tractor harrow is to raise the harrow plate 40 relative to the ground relative to the ground to advance the tractor (A) to perform the dusting operation, the outer harrow plate (42 or / and 43) during the soiling operation When the obstacle is hit or an overload is applied, the overloaded outer harrow plate 42 or / and 43 is provided with a second hinge formed at the end of the connecting arm 50 toward the outer harrow plate 42, 43. At the center of the branch 60, the tractor is going to rotate backward. In this case, since the connection arm and the outer harrow plate 42 or / and 43 with the overload are fixed and fixed by the safety bolts 52, the outer harrow plate 42 or / and 43 with the overload is actuated. The bolt 52 is prevented from rotating backward in the traveling direction of the tractor, but the rotational force of the outer harrow plate 42 or / and 43 due to the overload applied to the outer harrow plate 42 or / and 43 is increased. If the safety bolt 52 is greater than the cut limit load, the safety bolt 52 which secures the outer harrow plate 42 or / and 43 to the connection arm 50 is cut and the safety bolt 52 is cut. The outer harrow plate 42 or / and 43 coupled to the connecting arm 50 is rotated to the rear of the tractor in the forward direction of the tractor, so as to rotate backward of the tractor in the forward direction of the tractor, as shown in FIG. Since the overload is applied Plate (42 or / and 43) it is possible to prevent damage to the second hinge part 60 to the rotation center to the rear of the outer harrow plate (42 or / and 43).

In addition, depending on the angle at which the harrow plate 40 is erected with respect to the ground, the outer harrow plate 42 or / and 43 with the overload acts simultaneously with the first hinge part 51 and the second hinge part 60. In some cases, the outer harrow plate 42 or / and 43 may be protected by the cutting of the safety bolt 52 by rotating in the rearward direction by the action.

(3) Operation process of safety device when pushing soil

The tractor harrow is to raise the harrow plate (40) relative to the ground relative to the ground (about 70 to 120 degrees relative to the ground) to reverse the tractor (A) to push the dirt, In the meantime, if the outer harrow plate 42 or / and 43 hits an obstacle or an overload is applied, the outer harrow plate 42 or / and 43 on which the overload is applied is the outer harrow plate of the connecting arm 50. At the center of the second hinge portion 60 formed at the ends of the sides 42 and 43, it is going to rotate in the rearward direction of the tractor. In this case, since the connection arm and the outer harrow plate 42 or / and 43 with the overload are fixed and fixed by the safety bolts 52, the outer harrow plate 42 or / and 43 with the overload is actuated. The bolt 52 is prevented from rotating backward in the traveling direction of the tractor, but the rotational force of the outer harrow plate 42 or / and 43 due to the overload applied to the outer harrow plate 42 or / and 43 is increased. If the safety bolt 52 is greater than the cut limit load, the safety bolt 52 which secures the outer harrow plate 42 or / and 43 to the connection arm 50 is cut and the safety bolt 52 is cut. The outer harrow plate (42 and / and 43) coupled to the connecting arm 50 is rotated to the rear of the tractor in the forward direction of the tractor, so as to rotate backward of the tractor in the forward direction of the tractor as shown in FIG. do.

Therefore, the overloaded outer harrow plate 42 or / and 43 is pivoted rearward about the second hinge portion 60 to prevent damage to the outer harrow plate 42 or / and 43. will be.

In this way, it is possible to operate even when the tractor A reverses the dusting operation, the connection arm 50 is the outer harrow between the central harrow plate 41 or the outer harrow plate 42 Space is formed so that the end of the outer harrow plate 42 does not interfere with other parts of the harrow when the harrow plate 42 is bent in the opposite direction of travel of the tractor A about the second hinge portion 60. It is possible because it is structured as much as possible.

As seen from above, the harrow safety device according to the present invention is not only when the tractor is advanced for the flat work of the tractor harrow and the soil pushing but also when the tractor is reversed for the soil pushing. When the outer harrow plate collides with an obstacle or the overload action, the safety bolt is cut and folded back toward the tractor in the forward direction to protect the outer harrow plate from overload.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed without departing from the spirit and scope of the invention described in the claims below. It will be appreciated.

As described in detail above, the harrow safety device according to the present invention forms a second hinge portion to be rotated in a direction crossing the first hinge portion at the end of the outer harrow plate side of the connecting arm, the connection The arm has a space between the center harrow plate and the outer harrow plate such that the end of the outer harrow plate does not interfere with other parts of the harrow when the outer harrow plate is bent in the opposite direction of the tractor travel about the second hinge part. It has a structure to be formed, and by fixing the safety plate on one side of the connecting arm and having a safety bolt which is cut when the overload is applied to the outer harrow plate, all the work of the tractor (flat work, dirt work, dirt pushing work) ), When the outer harrow plate hits an obstacle or the overload is applied, the safety bolt is cut and rotated to the rear of the tractor in the upward direction. An outer harrow plate is protected against overload, etc. there is an effect that it is possible to prevent damage of the outer harrow plate.

Claims (8)

In the harrow safety device of the harrow plate consisting of a pair of left and right outer harrow plate joined by the center harrow plate and the connecting arm, At the end portion of the center harrow plate side of the connecting arm is formed a first hinge portion for allowing the outer harrow plate to rotate in the direction of the tractor when the tractor is advanced in a state in which the harrow plate is laid relatively to the ground, At the end portion of the outer harrow plate side of the connecting arm is formed a second hinge portion that allows the outer harrow plate to rotate in the front and rear direction of the tractor when the tractor is moved forward or backward with the harrow plate relatively upright relative to the ground. and, The connecting arm is such that the end of the outer harrow plate does not interfere with other parts of the harrow when the outer harrow plate is bent in a direction opposite to the tractor moving around the second hinge portion between the central harrow plate or the outer harrow plate. The structure is formed so that the space, Harrow safety device, characterized in that the safety plate is fixed to one side of the connection arm and the safety bolt is cut when the overload is applied to the outer harrow plate. According to claim 1, The second hinge portion is a harrow safety device, characterized in that formed on the hinge bracket installed on the harrow blade connection of the outer harrow plate. The method of claim 2, The hinge bracket is vertically formed on both sides to have an inner space to hinge the connecting arm to the inner space of the hinge bracket, so that one side of both sides of the connecting hinge bracket can be fixed by the safety bolt. Harrow safety device, characterized in that formed extending from the other side. The method of claim 3, wherein Harrow safety device, characterized in that the surface formed on one side extending from the hinge bracket than the other surface is formed on a relatively far side than the tractor. According to claim 1, The safety bolt is a harrow safety device, characterized in that the portion formed in the portion relatively weak strength compared to the harrow plate. The method according to any one of claims 1 to 5, The safety plate is a harrow safety device, characterized in that the connection is fixed to the chain fixed to the hinge bracket. The method according to any one of claims 1 to 5, Harrow safety devices, characterized in that the stopper is installed at both ends of the central harrow plate to limit the spread to the safety plate when the outer harrow plate is unfolded above the center harrow plate. The method of claim 7, wherein The stopper is a harrow safety device, characterized in that the stopper bracket formed on both ends of the central harrow plate made of bolts installed on the stopper bracket.

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