JPH09168302A - Contact pressing material such as resistant rod in tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a forcedly pressing member for a resistance rod, etc., in a tiller capable of upward and downward adjusting and positioning the resistance rod, etc., with a light operation force and not bringing the resistance rod, etc., to unstable state even when a working resistance varies. SOLUTION: In a tiller installed with an engine in front part of a machine body, a rotary tiller A in the rear part of the machine body and a handle above the rotary tiller A, a mission case 6 is installed between the engine and the rotary tiller A and the middle part of the mission case 6 is fixed with the front part of a rotary cover 14. The rear part of the mission case 6 is fixed with a supporting material 15 which penetrates through a resistance rod 21, etc., the supporting material 15 is fixed with the rear part of the rotary cover 14, positioning members which determine the placement of upper and lower positions of the resistance rod 21, etc., by engagement are installed to the supporting member 15 and the resistance rod 21, etc., and a forcedly pressing member which presses the resistance rod 21, etc., in the direction of its displacement by working resistance is installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biasing member such as a resistance rod in a cultivator.

[0002]

2. Description of the Related Art In general, a so-called dashing phenomenon may occur in a tilling machine when a rotary tilling device rotates normally.
There is a possibility that the operator may suddenly be pulled forward and fall down. Therefore, a configuration in which a resistance rod or the like provided behind the rotary tilling device is adjusted up and down and positioned so as to travel while receiving resistance from the field to prevent dashing is disclosed in Japanese Utility Model Publication No. 41-3045, It is known in Japanese Patent Application Laid-Open No. 55-3690, Japanese Patent Application Laid-Open No. 63-32403, and the like. However, in the technology described in the above publication, in order to adjust and position the resistance bar and the like up and down, a fastening member such as a bolt or a pin is operated in a releasing direction with one hand, and the resistance bar or the like is manipulated with the other hand. Holding
Adjusting up and down to an appropriate position, such as operating the fastening members such as the bolts and pins in the fixing direction with the one hand, must always use both hands, poor operability,
It takes a lot of trouble and has a problem that work efficiency is deteriorated.

In order to solve the above-mentioned problem, Japanese Unexamined Patent Application Publication No. 63-94903 discloses a method in which a transmission case is formed of two combined cases.
Forming a pressed recess in one of the mating cases,
A slide groove is formed along with the other flat surface, a plowing depth adjusting rod is inserted into the slide groove, and a hole having the same shape as the slide groove is formed at a position corresponding to the slide groove of the rotary cover. The drilled plate is bolted, and one end of the plate is fixedly provided with a lock pin with which one of the plurality of notches provided in the working depth adjusting rod engages, and the other end is provided with a pipe. There is described a biasing member for a working depth adjusting rod in which one end of a pin is fitted with a fixed bracket and a spring and a washer which are biasing members on the pipe.

In the technique described in Japanese Patent Application Laid-Open No. 63-94903, when performing vertical adjustment and positioning of the cultivation depth adjustment rod, the cultivation depth adjustment rod is moved with one hand by the urging force of an urging member. The notch engaged with the lock pin is removed to make it free by removing the notch engaged with the lock pin. Release the hand while aligning the part with the pin. Then, the tillage depth adjusting rod is moved forward by the urging force of the urging member, and the notch is engaged with the lock pin for positioning, so that the aforementioned Japanese Utility Model Publication No. 41-3045 and Japanese Utility Model Publication No. 55-3690 are disclosed. No., JP-A-63-324
It can be said that the operability and the work efficiency are better than those of the publication No. 03.

[0005]

However, what is described in the above-mentioned Japanese Patent Application Laid-Open No. 63-94903 is
As is apparent from FIG. 1 of the publication, when work resistance is applied to the tillage depth adjusting rod, the upper part of the tillage depth adjustment rod rotates around the lock pin in a direction opposite to the work resistance. Since the biasing member is disposed below the lock pin, the urging member is pressed in the same direction as the working resistance by the cultivation depth adjusting rod that has received the working resistance, and locks the notch of the cultivation depth adjusting rod. The urging member, which urges the pin, does not perform its original function, and the work depth adjustment rod becomes unstable due to a change in work resistance. Also,
As a means for solving the problem and constantly urging the notch of the tillage depth adjusting rod to the lock pin, it is conceivable to increase the urging force of the urging member. If it is made strong, a large operating force is required when operating the tillage depth adjusting rod against the urging force of the urging member to adjust the position up and down, and there is a problem that operability and work efficiency are deteriorated. .

[0006]

Therefore, in order to solve the above technical problems, the present invention comprises the following urging members such as resistance rods in a cultivator. That is,
In a tiller having an engine in front of the fuselage, a rotary tiller in the rear of the fuselage, and a handle above the rotary tiller, a transmission case is provided between the engine and the rotary tiller, and a middle part of the transmission case and a rotary cover. The front part is fixed, the rear part of the transmission case is fixed to the support member for inserting the resistance bar and the like, and the support member and the rear part of the rotary cover are fixed to the support member and the resistance rod and the like. A positioning member for positioning the upper and lower positions by engagement is provided, and an urging member for urging in a direction in which the resistance bar or the like is displaced by work resistance is provided.

[0007]

According to the present invention, the resistance bar and the like can be adjusted up and down,
In positioning, first, the resistance bar or the like is operated with one hand in a direction opposite to the direction in which the urging member is urged, and the positioning member provided on the resistance bar or the like is detached from the positioning member provided on the support member. Then, in this state, the resistance bar or the like is slid upward or downward to be positioned at an appropriate position, and when the hand is released at the position, the resistance bar or the like is positioned by the urging member. The positioning member provided on the resistance bar or the like engages with the positioning member provided on the support member, and the resistance bar or the like is set at a position desired by the operator.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments shown in the drawings will be described below.
An engine (2) is mounted on the body frame (1), and an input pulley (5) is driven from an engine pulley (3) via a belt (4). (A) is a rotary tillage device, which is composed of a rotary (8), a rotary cover (14), a rotating cover (17), and the like, and is provided between an input pulley (5) and an upright portion of an L-shaped transmission case (6). The wheel (7) is driven via the transmission gear, and the rotary (8) is driven via the transmission gear in the inclined portion. The bonnet (9) on the wheel (7) has a guide groove (10) for the shift lever (11). (13) is a handle attached to the inclined portion of the transmission case (6). The tension roller (12) is operated by a clutch lever (13a) on a handle (13). In the above-described cultivator, the front part of the rotary cover (14) is attached to the middle part of the inclined part of the transmission case (6). A rotary cover (17) is mounted on the outside of the rotary cover (14) so as to be vertically movable about the rotary shaft (16) in the embodiment shown in FIG.

Next, the specific structure of the support member (15) for the resistance rod (21) or the tillage depth adjusting rod (22) will be described. The support member (15) has a boot shape in a side view. As shown in FIG. 5, it has a hollow box shape. As shown in FIG. 6, the tip of the support member (15) forms a bifurcated shape, and the mounting plates (18) (18) on both sides of the support member (15) form the rotary shaft (16) of the inclined transmission case (6). , Whereby one end of the support member (15) through which the resistance rod (21) or the cultivation depth adjusting rod (22) is inserted is fixed to the transmission case (6). Then, a rotary cover (14) is mounted on a bracket (19) provided in the middle of the support member (15) and having a semicircular shape in a side view.
Are mounted with bolts and nuts through the mounting holes (20), (20), (20), and (20) (see FIG. 6), whereby the rear end of the rotary cover (14) and the resistance rod (2) are connected.
1) or a support member (1) through which a tillage adjusting rod (22) is inserted.
The other end of 5) is fixed.

A resistance rod (21) and a cultivation depth adjusting rod (2) are provided on the upper part of a hollow box-shaped support member (15).
The vertical adjustment notch (2) which is a positioning member provided in 2)
3) Pins (25) and (26) are positioning members which engage with (24) and perform positioning by the engagement, and the centers of torque springs (27) and (28) as biasing members are wound around the pins. The torque springs (27) and (28) engage with the rear surfaces of the resistance rod (21) and the cultivation depth adjusting rod (22).
The lower end of (28) engages with the holes (29) (30) provided in the support member (15) shown in FIG. In addition, as is apparent from FIG. 3 and the like, the resistance rod (21) and the cultivation depth adjusting rod (2)
The upper ends of the torque springs (27) and (28) engaged with the back surface of (2) engage with the vertical adjustment notches (23) and (24) provided on the resistance rod (21) and the plowing depth adjustment rod (22). In addition, it is located above pins (25) and (26) provided at the upper part in the support member (15) for positioning by the engagement.

Therefore, when work resistance is applied to the lower part of the resistance rod (21) and the tillage depth adjustment rod (22), the resistance rod (2)
1) The upper part of the tillage adjusting rod (22) is pin (25) (2)
6) is rotated in the direction opposite to the work resistance, but the upper ends of the torque springs (27) (28) are pin (25) (2).
6) Because it is located above, the resistance bar (2
1) Each pin (25) (2) of the tillage adjusting rod (22)
Above 6), a biasing force acts in a direction opposite to the work resistance, that is, toward the front of the fuselage, and even if the work resistance changes, the resistance rod (21) and the tillage depth adjustment rod (22) are not. It does not become stable. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 63-94903, which is a conventional example of this technology, the cultivation depth adjusting rod (2
There is no need to increase the urging force to urge the notch of (2) to the lock pin, and the resistance rod (21) and the cultivation depth adjusting rod (2) are not required.
In the case where 2) is operated against the urging force of the urging member to adjust the position up and down and perform positioning, the operability and work efficiency are better than those of the above-mentioned JP-A-63-94903.

In the lower part of the hollow box-shaped support member (15), pins (31), (32) and (33) are provided.
(34) and the resistance bar (2) with the pins (33) and (34).
The lower part of 1) is guided, and the lower part of the tillage adjusting rod (22) is guided by the pins (31) and (32). Therefore, the vertical adjustment and positioning of the resistance rod (21) and the cultivation depth adjustment rod (22) are performed by the resistance rod (21) and the cultivation depth adjustment rod (2).
The upper part of (2) is drawn toward the rear of the fuselage against the biasing direction of the torque springs (27) and (28), and the opening (3) opened above the support member (15).
Within the range of 5), the guide pins (33), (34) and (3)
1) The pin (2)
5) Remove the notches (23) and (24) for vertical adjustment from (26). Then, in this detached state, the resistance rod (2
1) Alternatively, after moving the tillage depth adjusting rod (22) up and down and positioning it at a desired position, when the hands are released from the respective rods, the resistance rod (21) is pressed by the urging force of the torque springs (27) and (28). Or the tillage adjusting rod (22) is pin (25) (2
6) is moved by being urged toward, and a notch (23) for vertical adjustment provided on a resistance rod (21) or a tillage depth adjustment rod (22).
(24) engages the pins (25) and (26) and is locked. Reference numeral (36) denotes a stopper pin of the resistance bar (21), so that the resistance bar (21) cannot be further tilted. Also, a collar (37) on the outer surface of the support member (15)
If the pins are inserted into the collar provided on the rotating cover (17), the rotating cover (17) can be fixed at the raised position.

The resistance bar (21) is positioned downward when the rotary (8) rotates forward, and is positioned upward when the rotary (8) rotates reversely. When the operation of the resistance rod (21) and the plowing depth adjustment rod (22) becomes heavy, the clutch lever (13
a) is turned off, the engine (2) is stopped, mud grass and the like clogged in the resistance rod (21) and the tillage depth adjustment rod (22) in the rotary cover (14) are removed, and oil is applied to move up and down. Care should be taken to make operation easier. At that time, resistance bar (2
1) Since the tillage adjusting rod (22) is inserted into the hollow of the support member (15), it is inserted into the groove as described in JP-A-63-32403 and JP-A-63-94903. The maintenance is easier than in the case where it is performed. A tail sled (22a) is attached to the tillage adjusting rod (22).
Different types can be prepared and used according to the soil.

The support member (15) is provided with mounting plates (18) (1).
By removing 8) and bracket (19) from the transmission case (6) and the rotary cover (14), not only can they be easily removed, but also they can be easily attached. The front part of the rotary cover (14) is, as described above,
It is attached to the transmission case. As shown in FIG. 3, its specific structure is attached to a flange (43) formed in the middle of the transmission case (6) with bolts (42). In addition, the transmission case (6) and the support member (1
5) The rotary cover (14) is arranged such that each of the fixing portions becomes a vertex of a substantially triangular shape in a side view, and is formed by a space (a) penetrating the inside of the substantially triangular shape in the left-right direction.

In addition, on one side upper part of the support member (15),
As shown in FIG. 9, a working machine mounting bracket (38), which is a working machine mounting member, is fixed, and a working machine such as a plow can be mounted. According to FIG. 9, the work implement mounting rod (40) is inserted into the cylindrical portion (39) of the work implement mounting bracket (38), and the work implement mounting rod (40) is fixed with a knob screw so that it can be slightly vertically adjusted depending on the working state. When the machine is set, a regulating plate (4) for regulating the uppermost position of the working machine mounting rod (40) so that the working machine can be set at the optimum position.
1) is provided. Further, according to Japanese Patent Application Laid-Open No. 63-94903, which is a conventional example of this technology, a cultivation depth adjusting rod is inserted from below and attached. The work implement must be removed, and then the work implement must be attached, which is very troublesome and troublesome, but in FIG.
Can be attached with a single touch while keeping the upper position.

In addition to the above, according to FIG. 1, the guide mechanism of the resistance rod (21) and the plowing depth adjustment rod (22) is integrally formed by a hollow box-shaped support member (15). Therefore, the guide mechanism is simplified. In this embodiment, the pin (25) for engaging the notches (23) and (24) for adjusting the resistance of the resistance rod (21) or the tillage depth adjusting rod (22).
Since the coil portions of the torque springs (27) and (28) are wound around the pins (25) and (26) using (26), the coil portions of the torque springs (27) and (28) are wound. Separate members become unnecessary, the number of parts and the number of assembling steps are reduced, and the cost is reduced.

A conventional example of this technique is disclosed in
In JP-A-94903, as a biasing member for biasing a tillage depth adjusting rod to a lock pin provided on a plate,
A bracket provided with a spring, a washer, and a pin, and a pipe for holding the spring, washer, and the pin is required.
The urging member is bifurcated in a side view, and one of the urging members is engaged with one side of the resistance bar or the like, and the other is engaged with the support member. A bracket that has a pipe for holding the conventional spring, washer, and pin, which is engaged with one side so as to serve also as a conventional spring, washer, and pin, and is engaged with a support member. As a result, the number of parts and the number of assembling steps are reduced, the cost is reduced, and a more simplified urging member can be obtained.

[0018]

According to the present invention, a transmission case is provided between the engine and the rotary plow in a tiller having an engine in front of the fuselage, a rotary plow in the rear of the fuselage, and a handle above the rotary plow. A midway portion of the transmission case and a front portion of the rotary cover; a rear portion of the transmission case and a support member through which a resistance bar or the like is inserted; and a support member and a rear portion of the rotary cover. A rod or the like is provided with a positioning member for positioning an upper or lower position of the resistance bar or the like, and an urging member for urging the resistance bar or the like to a positioning member on the support member side is provided. The up and down adjustment and positioning can be easily performed, and the resistance bar and the like do not become unstable even if the working resistance changes.

That is, when adjusting and positioning the resistance bar and the like up and down, the resistance bar and the like are provided on the resistance bar and the like simply by operating the upper end of the resistance bar and the like in the direction opposite to the direction in which the urging member is urged by one hand. The positioning member is detached from the positioning member provided on the support member, and in this state, the resistance bar or the like is adjusted up and down to an appropriate position, and the hand is released at this position. The positioning member provided is urged toward the positioning member provided on the support member and moves, and the positioning member provided on the resistance bar and the like and the positioning member provided on the support member are engaged and locked, so that one-handed operation is performed. In addition, it is possible to adjust the resistance bar and the like up and down with one touch.
The operability is good and the working efficiency is improved.

When work resistance is applied to the resistance bar or the like, the upper portion of the resistance bar or the like rotates in a direction opposite to the work resistance about the positioning member provided on the support member. By providing the urging member for urging in the direction of displacement, the urging force for urging the upper portion of the resistance bar or the like always works in the opposite direction to the work resistance works, and even if the work resistance changes, the resistance bar or the like is not actuated. It does not become unstable. In addition, since the positioning member provided on the resistance bar or the like is constantly biased against the positioning member provided on the support member, it is not necessary to increase the urging force of the biasing member as in the related art. In the case where the operation is performed against the urging force of the urging member, and the vertical adjustment and positioning are performed, the operation can be performed with a lighter operation force as compared with the related art, and there is an effect that operability is good and work efficiency is good.

[Brief description of the drawings]

FIG. 1 is an overall view of the cultivator of the present invention.

FIG. 2 is a plan view of the above.

FIG. 3 is an enlarged view of a rotary portion.

FIG. 4 is a front view of a support member.

FIG. 5 is a plan view of the above.

FIG. 6 is a view taken in the direction of the arrow X in FIG. 4;

FIG. 7 (a) is a front view of the resistance bar, and (b) is a partial view of the resistance bar.

Fig. 8 (a) is a front view of the tillage adjusting rod, and (b) is a partial view of the tillage adjusting rod.

FIG. 9 is a front view of a work implement bracket.

10A is a partial side view of the above, and FIG. 10B is a top view of the same.

[Explanation of symbols]

 Reference Signs List A Rotary tillage device 6 Transmission case 8 Rotary 14 Rotary cover 15 Support member 16 Rotary shaft 21 Resistance rod 22 Plowing depth adjustment rod

Claims (1)

[Claims] 1. A cultivator having an engine in front of a fuselage, a rotary tilling device in a rear portion of a fuselage, and a handle above a rotary cultivating device, wherein a transmission case is provided between the engine and the rotary tilling device. The midway portion and the front of the rotary cover are fixed, and the rear of the transmission case and the support member through which the resistance bar and the like are inserted are fixed, and the support member and the rear portion of the rotary cover are fixed, and the support member and the resistance bar and the like are fixed. A tilling machine characterized in that a positioning member for positioning the upper and lower positions of the resistance bar or the like by engagement is provided, and an urging member for urging the resistance bar or the like in a direction in which the resistance bar or the like is displaced by work resistance is provided. A biasing member such as a resistance rod.