JP3599429B2 - Working part descent control device of agricultural work machine - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a working unit lowering control device for an agricultural working machine.
[0002]
[Prior art]
Conventionally, as one form of agricultural work machine, a work section such as a cultivator is mounted via a lifting link mechanism at the rear of the machine such as a riding management machine, and a grounding body or tail wheel is mounted on the work section. There is one that can adjust the tillage depth of the part.
[0003]
[Problems to be solved by the invention]
However, the above-described agricultural working machine still has the following problems.
[0004]
{Circle around (1)} In the lifting link mechanism, the working part does not vertically move up and down because the moving trajectory of the working part is substantially arc-shaped. Difficult to get an idea of the location.
[0005]
(2) Since the front and rear inclination of the working unit changes depending on the vertical position of the working unit, if the height of the work unit is adjusted during the operation, the front and rear inclination of the working unit changes, and the optimum front and rear posture is adjusted. Cannot work continuously.
[0006]
(3) In the lifting link mechanism, since the length of the link cannot be reduced to a certain value or less, the total length of the body when the working unit is connected to the traveling unit becomes large, making it difficult to work in a narrow field. In addition, a large garage is required.
[0007]
{Circle around (4)} When a grounded body is attached, an overload acts on the drive unit of the machine due to frictional resistance generated between the grounded body and the ground, and the horsepower of the drive unit decreases.
[0008]
(5) As described in (3) above, when the working unit is connected to the machine, the overall length becomes large. Therefore, when the tail wheel is attached to the working unit, the worker sits on the machine with the tail wheel. Adjustment cannot be performed in the inclined position, and there is a trouble that the user must step down from the machine and move to the tail wheel mounting position one by one.
[0009]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention provides a working unit lowering control device for an agricultural working machine that solves the above-mentioned problems.
[0010]
The present invention relates to an agricultural working machine in which a working unit (C) is attached to a rear portion of the machine (B) via a vertical elevating guide mechanism (D), wherein the vertical elevating guide mechanism (D) A fixed guide body (15) fixed to the machine (B) side, and a movable support (16) that vertically moves up and down along the fixed guide body (15) and supports the working unit (C); The movable support (16) includes a lifting hydraulic cylinder (28) having a lower end attached to the lower front end of the fixed guide body (15), and a pulley at the upper end of a piston rod (29) of the lifting hydraulic cylinder (28). A pulley (31) rotatably mounted on a support frame (30) via a pulley support shaft (32) whose axis is oriented in the front-rear direction, and a middle part is wound around the upper peripheral surface of the pulley (31) so that one end is formed. Elevating means (21) comprising an elevating rope (33) having the other end fixed to the peripheral wall of the elevating hydraulic cylinder (28) and connected to the movable support (16). In the agricultural working machine which is vertically moved upward by moving, the working unit connecting hitch (25) forming a part of the vertical lifting guide mechanism (D) and the lifting hydraulic cylinder (28) are fixed to the fixed guide body (15). ) Between the left and right guide frames (12) and (13), and a central portion of a connecting plate (17) laid between upper ends of the left and right guide frames (12) and (13) of the fixed guide body (15). A male screw rod support (40) is mounted on the male screw rod support (40), and the upper end of a male screw rod (41) extending vertically is rotatably mounted on the male screw rod support (40) around its axis. ) Is attached to the upper end of the lowering restricting operation handle (42), and the upper end of a lowering restricting plate (43) extending vertically is screwed to the lower end of the male screw rod (41). ), The pulley support shaft (32) is slidably inserted vertically into the elongated hole (45) extending in the vertical direction. A lowering restricting device (M) is formed and arranged at the center upper portion of the fixed guide body (15), and the lowering restricting operation handle (42) of the working unit lowering restricting device (M) is connected to a seat ( It is characterized by being arranged close to 5).
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
A shown in FIG. 1 is an agricultural working machine provided with a working unit lowering control device M according to the present invention. The agricultural working machine A is provided with a working unit C at the rear of a riding management machine as the machine B. The tiller is mounted vertically vertically by a vertical lifting guide mechanism D, and a power transmission mechanism E is interposed between the machine B and the working section C, and the power transmission mechanism E operates from the machine B. The power transmission is transmitted to the section C so that the working section C can be operated.
[0013]
As shown in FIG. 1, the machine B has left and right front and rear wheels 2 and 3 disposed on the front and rear and left and right sides of the body frame 1, respectively, a steering operation unit 4 provided at a front end of the body frame 1, and The seat 5 is mounted at a predetermined interval, and the motor unit 6 is mounted behind the seat 5.
[0014]
A traveling belt transmission mechanism 9 is provided between the output shaft 7 of the motor unit 6 and the traveling input shaft 8.
[0015]
As shown in FIGS. 1 to 3, the vertical lift guide mechanism D includes a fixed guide body 15 fixed to the rear end of the machine B via a bracket 11, and vertically moves along the fixed guide body 15. And a movable support member 16 for supporting the working portion C. The fixed guide member 15 has a pair of left and right guide frames 12 and 13 having a substantially U-shaped cross section at the rear end of the bracket 11. , 14 are vertically opposed to each other, and connecting plates 17, 18 are horizontally mounted between upper end portions and intermediate portions of the left and right guide frames 12, 13.
[0016]
As shown in FIGS. 2 and 3, the movable support 16 is composed of a vertical elevating connector 20 vertically moving up and down along the left and right guide frames 12 and 13 of the fixed guide member 15, and the vertical elevating connector 20. It is formed by elevating means 21 for elevating and lowering.
[0017]
As shown in FIGS. 2 and 3, the vertical ascent / descent connector 20 has a pair of left and right support plates 22 and 23 extending in the vertical direction between the left and right guide frames 12 and 13. The guide rollers 24, 24, 24, 24 that roll in the openings 14, 14 of the left and right guide frames 12, 13 are attached to the upper and lower portions, respectively, while the work is performed between the rear ends of the left and right support plates 22, 23. The part connecting hitch 25 is horizontally mounted, and the hitch 25 has a connecting pin insertion hole 26 formed therein.
[0018]
As shown in FIGS. 2 and 3, the elevating means 21 hangs a cylinder support 27 between lower front ends of the left and right guide frames 12, 13. The lower end of the piston rod 29 is attached to the lower end of the hydraulic cylinder 28 for vertical movement by a mounting pin 39 via supporting protrusions 27a, 27a, and the pulley support frame 30 is attached to the upper end of the piston rod 29. And a pulley 31 is rotatably mounted on the pulley support frame 30 via a pulley support shaft 32 whose axis is oriented in the front-rear direction, and a middle part of a lifting rope 33 is wound around an upper peripheral surface of the pulley 31, One end of the lifting rope 33 is fixed to the peripheral wall of the lifting hydraulic cylinder 28 via a fixing pin 34, while the other end is connected to the right support plate 23 via a connecting pin 35.
[0019]
In FIGS. 2 and 3, reference numeral 36 denotes a hydraulic hose, and the lifting hydraulic cylinder 28 is connected to a hydraulic device (not shown) mounted on the machine B via the hydraulic hose 36. Reference numeral 37 denotes a pulley cover, which prevents the lifting rope 33 from coming off the pulley 31.
[0020]
In this way, the hydraulic oil is introduced into and out of the hydraulic cylinder 28 for elevating and lowering via the hydraulic hose 36, and the piston rod 29 of the hydraulic cylinder 28 for elevating is extended and retracted, whereby the pulley 31 is raised and lowered. The working unit C connected to the operating unit connecting hitch 25 via the lifting rope 33 can be moved up and down in parallel with the left and right guide frames 12 and 13, that is, vertically.
[0021]
In addition, by removing the hydraulic oil from the hydraulic cylinder 27 for lifting and lowering, the working unit C connected to the working unit connecting hitch 25 by its own weight can be moved downward parallel to the left and right guide frames 12 and 13, that is, vertically. ing.
[0022]
The lifting / lowering operation of the work unit connecting hitch 25 is performed by the action of the pulley 31 and the lifting rope 33, and the expansion / contraction operation of the lifting / lowering hydraulic cylinder 28 is doubled. Can be
[0023]
In particular, since the working section connecting hitch 25 and the lifting hydraulic cylinder 28, which form a part of the vertical lifting guide mechanism D, are arranged between the left and right guide frames 12, 13, the vertical lifting guide mechanism D By shortening the front-rear length, the overall length of the machine body when the machine B and the working unit C are connected can be shortened.
[0024]
In the above configuration, the gist of the present invention resides in that the working unit lowering regulating device M is interposed between the fixed guide body 15 and the movable support member 16. Will be described with reference to FIGS. 2 and 3. FIG.
[0025]
That is, as shown in FIGS. 2 and 3, the working unit descent restricting device M attaches the male screw rod support 40 to the center of the connecting plate 17 laid horizontally between the upper ends of the left and right guide frames 12 and 13. The upper end of a male screw rod 41 extending in the vertical direction is rotatably mounted on the male screw rod support body 40 around its axis. The lowering operation handle 42 is attached to the upper end of the male screw rod 41, and the male screw is The lower end of the rod 41 is screwed with an upper end portion of a lowering regulating plate 43 extending vertically in a vertical direction through a female screw portion 44 to form a long hole 45 extending vertically in the lowering regulating plate 43. The front end of the pulley support shaft 32 is inserted into the elongated hole 45 so as to be vertically slidable. Reference numeral 46 denotes a retaining body attached to the front end of the pulley support shaft 32.
[0026]
The seat 5 provided on the machine B and the lowering control operation handle 42 are arranged close to each other, and the operator sitting on the seat 5 extends one hand rearward, and easily moves the lowering control operation handle 42. It can be rotated.
[0027]
In this manner, by operating the lowering operation handle 42 in the normal and reverse directions, the male screw rod 41 is rotated in the normal and reverse directions, and the lowering control plate 43 is moved in the vertical direction via the female screw portion 44. The position of the lower end 45a of the long hole 45 formed in the regulating plate 43 can be adjusted vertically.
[0028]
At this time, the pulley support shaft 32 provided on the movable support 16 can contact the lower end portion 45a of the elongated hole 45 to regulate the lowering thereof. Therefore, the lowering of the working unit C attached to the movable support 16 can be performed. Can be regulated.
[0029]
As shown in FIG. 1, the working section C is connected by connecting a connecting pin 38 to a connecting pin insertion hole 26 formed in the working section connecting hitch 25.
[0030]
As shown in FIG. 4, a substantially pipe-shaped output shaft case 51 is inserted into the front part of the bracket 11, and an output shaft 52 is rotatably inserted into the output shaft case 51. An input pulley 53 is fitted to the left end of the shaft 52, and the input pulley 53 is operatively connected to the output shaft 7 of the motor unit 6 via a working unit transmission belt 54.
[0031]
As shown in FIGS. 1 and 4, the power transmission mechanism E is formed by a front transmission portion 48 and a rear transmission portion 49, and is provided at the right end of the output shaft case 38 on the front side with the output shaft 39 as a center. A front end portion of the transmission portion 48 is rotatably linked to the front end portion of the transmission portion 48, and a front end portion of the rear transmission portion 49 is inserted through a rear end portion of the front transmission portion 48, and the middle bending support shaft 50 is inserted through the front and rear end portions in common. , And the rear end of the rear transmission portion 49 is rotatably connected to the input shaft 55 of the working unit C.
[0032]
In the power transmission mechanism E according to the present embodiment, as shown in FIG. 1, the working unit C is vertically moved up and down by the operation of the lifting guide mechanism D, and the input shaft 52 of the machine B and the input of the working unit C are input. Even when the position relative to the shaft 55 changes, the interlocking connection between the output shaft 52 of the machine B and the input shaft 55 of the working unit C is maintained by the bending operation of the front transmission case 48 and the rear transmission case 49. Therefore, the power from the prime mover unit 6 transmitted to the output shaft 52 of the machine B can be smoothly transmitted to the input shaft 55 of the working unit C.
[0033]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0034]
{Circle around (1)} According to the present invention, the working unit can be vertically moved up and down by connecting the working unit to the rear of the machine via the vertical lifting / lowering guide mechanism. When lowering the working unit accurately, it is easy to get an idea of the position of the machine, and even if the lifting position of the working unit is changed, the front and rear inclination posture of the working unit does not change. Even when the ground height of the section is adjusted, the work can be performed while maintaining the working section in the optimum working posture.
[0035]
(2) According to the first aspect of the present invention, since the working section is attached to the rear portion of the machine via the vertical lifting / lowering guide mechanism, the working section is arranged as close to the machine as possible. Therefore, the overall length of the body can be reduced, and work in a narrow field can be easily performed.
[0036]
(3) According to the first aspect of the present invention, since the lowering of the working unit can be regulated by the working unit lowering regulating device, there is no need to attach the grounding body or the tail wheel, and the grounding body and the ground can be separated. Eliminating the horsepower of the drive unit due to frictional resistance generated between them and the occurrence of sliding traces due to the grounding body are eliminated, and it is necessary to step down from the machine one by one and move to the tail wheel mounting position for tail wheel adjustment work. The complexity of this is also eliminated.
[0037]
Moreover, when the working unit is a cultivator, the cultivation depth can be set mechanically and reliably.
[0038]
{Circle around (4)} According to the present invention, the worker can operate the work unit lowering restriction device while sitting on the seat of the machine to easily adjust the lowering position of the work unit.
[Brief description of the drawings]
FIG. 1 is a side view of an agricultural working machine including a working unit lowering control device according to the present invention.
FIG. 2 is a side view of a vertical lift guide mechanism.
FIG. 3 is a front view of a vertical lifting guide mechanism.
FIG. 4 is a sectional explanatory view of a power transmission mechanism.
[Explanation of symbols]
Reference Signs List A Agricultural work machine B Machine C Work unit D Vertical ascent / descent guide mechanism M Work unit descent control device 15 Fixed guide body 16 Movable support

Claims (1)

An agricultural working machine in which a working unit (C) is attached to the rear of the machine (B) via a vertical elevating guide mechanism (D), and the vertical elevating guide mechanism (D) is attached to the machine (B) side. fixed fixed guide body (15), as well as vertical lift along the fixed guide member (15), comprising a movable support for supporting the working portion (C) (16), the movable support (16) The lifting and lowering hydraulic cylinder ( 28 ) having a lower end attached to the lower front end of the fixed guide body ( 15 ) and the pulley support frame ( 30 ) at the upper end of the piston rod ( 29 ) of the lifting and lowering hydraulic cylinder ( 28 ). A pulley ( 31 ) rotatably mounted via a pulley support shaft ( 32 ) whose axis is oriented in the front-rear direction, and a hydraulic cylinder ( 28 ) that extends around a halfway part on the upper peripheral surface of the pulley ( 31 ) and lifts one end. ) , While the other end is connected to a movable support ( 16 ) by an elevating means ( 21 ) comprising an elevating rope ( 33 ) . In agricultural working machine raising moved vertically I, the vertical elevation guide mechanism (D) of the working unit coupling hitch forming part (25) and the lifting hydraulic cylinder (28) and a fixed guide member (15 ) while disposed between the left and right guide frames (12) (13) of the central portion of the left and right guide frames of the fixed guide member (15) (12) (connecting plate which is laterally placed between the upper end of 13) (17) Install the male screw rod support (40), a rotatably mounted to the upper end portion of the male screw rod (41) which extends in the vertical direction with the male threaded rod support (40) on its axis around male threaded rod (41 while mounting the descending restriction operating handle (42) at the upper end of), screwed to the upper end of the descending restriction plate which extends in the vertical direction to the lower end portion of the male screw rod (41) (43), the descent-restricting plate (43 the pulley shaft in the elongated hole (45) which extends in the vertical direction formed in) (32) Vertically slidably inserted to form a working unit lowered restricting device (M) arranged at the top center of the fixed guide member (15), the descending restriction operation handle of the working unit lowered restricting device (M) (42) A lowering device for a working unit of an agricultural working machine, wherein the working unit lowering device is disposed close to a seat ( 5 ) of the machine ( B ) .

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