JP3514605B2 - Agricultural work machine folding method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor in which a central portion in a longitudinal direction is mounted on a rear portion of a tractor via a three-point link hitch mechanism so as to be able to move up and down. The present invention relates to a method of folding an agricultural work machine, wherein work machine portions extending to both left and right sides can be folded toward a central portion. 2. Description of the Related Art Conventionally, a central part in the longitudinal direction of an agricultural work machine is mounted on a rear part of a tractor via a three-point link hitch mechanism so as to be able to move up and down, and power is transmitted from the tractor to the central part of the agricultural work machine. Along with the central portion, there is a well-known agricultural working machine in which a working machine portion extending to the left and right sides from the central portion can be folded toward the central portion in order to shorten the lateral length of the machine body. is there. [0003] As a method of folding the left and right working machine parts with respect to the central part, Fold the left and right working machine parts behind the central part. . The left and right working machine parts are folded so as to stand obliquely upward from the central part. Such means are known. [0004] The above-mentioned (1). In the case of (1), when traveling or moving with the agricultural work machine mounted on the tractor, the front-rear balance is poor, the overhang to the rear is large, and attention must be paid to the corners.
The above (2). In this case, the position of the center of gravity of the agricultural work machine becomes high, and there is a possibility that the agricultural work machine will fall over in the left-right direction when traveling while mounted on the tractor. In addition, the rear view of the tractor operator deteriorates. (3). The working machine part of the right and left only in the oil pressure cylinder but none were respectively allow 180 ° folding and deployment. There was a problem. According to the present invention, the front-rear balance when traveling and moving with the agricultural work machine mounted on the tractor is not deteriorated, and the machine body weight center position when the farm work machine is folded is not increased, and the agricultural work machine is mounted on the tractor. was made for the purpose of lateral direction is a risk of falling rather name, hydraulic cylinders only by the working machine part of the left and right to allow each 180 ° folding and deployment to solve the conventional problems described above that when riding Te It is. SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an agricultural machine having a longitudinal central portion mounted on a rear portion of a tractor via a three-point link hitch mechanism so as to be able to move up and down. In the agricultural work machine, the power is transmitted from the tractor to a central portion of the farm work machine, and the work machine portions extending to the left and right sides from the center portion with respect to the central portion are respectively foldable toward the center portion. The above-mentioned agricultural work machine is divided into a central part and left and right work equipment parts, and the left and right ends of the central part and the inner ends of the left and right work equipment parts are connected by a rotation fulcrum so that they can be rotated by approximately 180 °. In addition, a guide plate having a guide groove is fixed to the left and right working machine parts, and the other end of the rotating arm having one end provided with a guide pin to be inserted into the guide groove is pivotally supported on the center part side. And said The intermediate portion of the rolling arm, connects the piston tip of the hydraulic cylinder supporting the base end to the center portion side, right and left it
It is characterized in that the right and left working machine portions can be folded and unfolded by the expansion and contraction operation of the hydraulic cylinders provided respectively. According to the above-mentioned means, the method for folding an agricultural working machine according to the present invention is characterized in that when the left and right working machine parts are rotated by 180 ° between the working position and the folded position with respect to the center part of the agricultural working machine, the hydraulic cylinder is switched. It can be performed only by the expansion and contraction operation of. [0008] Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. In the figure, reference numeral 1 indicates that the length in the left-right direction is long (3770 m in this embodiment).
m) It is a scraping harrow having a crushing and scraping function. Although not shown, a connecting portion 2 for connecting to a tractor, which is connected to a well-known three-point link hitch mechanism including a top link and a lower link of the tractor, is provided at a front portion of the substitute harrow. 1 is attached to the rear of the tractor so as to be able to move up and down. Also, the input shaft 3 is provided from the PTO shaft of the tractor to a transmission gear box 3 provided at the front center of the substitute harrow 1 via a universal joint, a transmission shaft and the like.
Power is transmitted via a. The scraping harrow 1 has a central portion 4 (length = 19).
00 mm) and left and right working machine parts 5L, 5R (length = 9 each)
30 mm), and the right and left ends of the central part 4 and the inner ends of the left and right working machine parts 5L and 5R are connected by rotating shafts (rotating fulcrums) 6 and 6 so as to be able to rotate substantially 180 °. The back surface 4a of the central portion 4 and the left and right working machine portions 5
L, 5R are superimposed on the back surface 5La, 5Ra (facing
) So that it can be folded. As shown in the drawing, the left and right working machine parts 5 correspond to the length of the central part 4.
The lengths of L and 5R are almost halved. Since the working machine parts 5L and 5R are symmetrical and have the same configuration, only one working machine part 5L will be described. Transmission frames 8 and 8a are provided on both left and right sides of the gear box 3 and serve as a main body frame and include transmission shafts 7 and 7a. From the transmission frames 8 and 8a, the chain transmission case 9 is located at the rear of the tractor tire T at the center portion 4 and at the outer end of the working machine portions 5L and 5R.
Is hanging. A rotary shaft 11 is suspended between the lower end of each of the chain transmission cases 9 and the lower end of a support frame 10 vertically installed facing the chain transmission case 9 from the transmission frames 8, 8a. On the circumference of the rotary shaft 11, a large number of soil crushing / scraping claws 12 are attached, and
The data 13 is constituted. A dog clutch 14 is provided at a portion where the shaft ends of the transmission shafts 7 and 7a face each other.
The dog clutch 14 is connected when the whole scratching harrow 1 shown in FIG. 1 is in the working state, and when the left and right working machine parts 5L, 5R are turned around the rotation shaft 6 and folded on the central part 4, the dog clutch 14 is connected. Is disconnected. Soil crusher / Scraper rotor 1
The upper part of the apron 3 is covered with a shield cover 15 supported by the main body frame, and a rear end of the shield cover 15 has an apron 1 pivotally supporting a leveler 17 at a rear end position.
6 is pivotally attached to the upper end so as to be rotatable vertically. The folded opposing portions of the leveler 17 are connected by a hinge 18 that rotates about an axis substantially equal to the axis of the rotating shaft 6. Further, the leveler 17 can be displaced between a leveling position for leveling the soil and a soil collecting position for scraping the soil. A guide plate 19 having a guide groove 19a is fixed to the folding and rotating portion of the working machine portion 5L, and a guide pin 20a inserted into the guide groove 19a at one end is provided above the guide plate 19. Having the other end in the central part 4
A rotary arm 20 which is rotatably supported in the left and right direction by a shaft 20 b and is bent in a V-shape is provided on a side of the hydraulic cylinder 2 between an intermediate portion of the rotary arm 20 and the transmission frame 8.
The work machine portion 5L is rotated between the working position and the folded position by the expansion and contraction operation of the hydraulic cylinder 21. When the working machine portion 5L is in the working position, it is locked by the lock device 22. [0013] That is, the scraper harrow 1 is divided into a central part 4 and left and right working machine parts 5L and 5R, and the left and right ends of the central part 4 and the inner ends of the left and right working machine parts. Are connected by a rotation shaft 6 so as to be able to rotate substantially 180 °. Guide grooves 19 are provided in the left and right working machine portions 5L and 5R.
a guide plate 19 having an a.
The other end of the rotary arm 20 provided with a guide pin 20a at one end to be inserted into a is pivotally supported by the shaft 20b on the central portion 4 side. A piston end of a hydraulic cylinder 21 having a base end supported on the center portion 4 side is connected to an intermediate portion of the rotary arm 20, and the left and right working machine parts 5 </ b> L and 5 </ b> R are folded and expanded by the expansion and contraction operation of the hydraulic cylinder 21. Making it possible. When the left and right working machine parts 5L and 5R are folded on the central part 4, the stand with wheels 23 is detachably provided on the support frames 10 at the left and right ends of the central part 4. Further, a residual tillage treatment device is provided below each of the chain transmission cases 9. As described above, according to the method for folding an agricultural working machine of the present invention, the agricultural working machine is divided into a central part and left and right working equipment parts, and the left and right ends of the central part are divided. And the inner ends of the left and right working machine parts are connected by a rotation fulcrum so as to be substantially 180 ° rotatable, and a guide plate having a guide groove is fixed to the left and right working machine parts, and fitted into the guide grooves. The other end of a rotary arm having a guide pin provided at one end thereof is pivotally supported on the central portion side, and the middle end of the rotary arm is connected to the piston tip of a hydraulic cylinder having a base end supported on the central portion side. The left and right working machine parts are folded by the expansion and contraction operation of the hydraulic cylinders provided on each
Since the unfolding is enabled, the left and right working machine parts can be rotated by 180 ° between the working position (deployed position) and the folded position with respect to the central part of the agricultural working machine, and can be switched only by the expansion and contraction operation of the hydraulic cylinder. Therefore, Ru can be thin <br/> pull the structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic rear view of an entire folding surrogate harrow according to the present invention. FIG. 2 is a schematic side view from the direction A in FIG. 1; FIG. 3 is a schematic side view of a state where a substitute harrow is folded. FIG. 4 is a schematic plan view from the direction B in FIG. 3; FIG. 5 is a partial plan view of a substitute harrow according to the present invention. FIG. 6 is a side view showing a state in which a substitute harrow is folded. FIG. 7 is a partial plan view of a substitute harrow. FIG. 8 is a partial plan view of the folding mechanism. FIG. 9 is a partial plan view in a folded state. [Description of References] 1st scraper harrow 2 Connecting part to tractor 3 speed change gearbox 3a input shaft 4 central portion of alternate scraper 4a Back surface of central portion 5L left working machine portion 5R right working machine portion 5La left working machine portion Rear 5Ra Rear of right working machine 6 Rotary shaft (rotary fulcrum) 7, 7a Transmission shaft 8 Transmission frame 9 Chain transmission case 10 Support frame 11 Rotary shaft 12 Crushed soil / scraping claw 13 Soiled / scraping rotor 14 Dog clutch 15 Shield cover 16 Apron 17 Leveler 18 Hinge 19 Guide plate 19a Guide groove 20 Rotating arm 20a Guide pin 20b Shaft 21 Hydraulic cylinder 22 Lock device 23 Wheel stand T Tractor tire

Claims (1)

(57) [Claims 1] At the rear part of the tractor, a central part in the longitudinal direction of the agricultural work machine is mounted via a three-point link hitch mechanism so as to be able to ascend and descend. In the agricultural work machine that transmits power and extends the working machine portion extending from the center portion to the left and right sides with respect to the center portion, the farm working machine can be folded toward the center portion side. The central part is divided into three parts, and the left and right ends of the central part and the inner ends of the left and right working parts are connected to each other by a rotation fulcrum so as to be substantially 180 ° rotatable. A guide plate having a guide groove is fixedly provided, and the other end of a rotating arm provided with a guide pin fitted on the guide groove at one end is pivotally supported on the central portion side, and at an intermediate portion of the rotating arm, Support the base end toward the center How to connect the piston tip of the hydraulic cylinder, the agricultural machine for the expansion and contraction operation of the hydraulic cylinders provided on the left and right respectively, characterized in that a foldable and deploy working machine part of the left and right folding that.