JPH0246253Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a traveling transmission device for a riding rice transplanter in which a planting section is mounted on a traveling section so as to be movable up and down.

Conventionally, as shown in Japanese Utility Model Application Publication No. 50-99136, there has been a combine harvester in which a traveling speed change lever and a lifting lever are connected and interlocked.

However, in the prior art, since the interlocking timing for connecting the levers is always approximately constant, it is necessary to match the neutral or switching position of each lever to maintain the relative position approximately constant. Each operating system is likely to be restricted, and there are structural and manufacturing problems such as the inability to adjust the position of each lever individually.

However, in the present invention, an interlocking arm that interlocks and connects the traveling speed change lever and the planting lift lever is provided so that the position can be adjusted in the direction of interlocking movement, and the interlocking timing of each of the levers by the interlocking arm can be freely set. It is characterized by this.

Therefore, by adjusting the position of the interlocking arm after assembling each of the levers and their operating system, the interlocking timing of each lever by the interlocking arm can be easily obtained by simple setting adjustment, and the manufacturing of each lever, etc. Also, it is possible to easily correct assembly errors and initialize the operating feel, and it is also possible to easily improve the linkage function of the lever and the ease of handling compared to the prior art.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Fig. 1 is a side view of the riding rice transplanter, Fig. 2 is a plan view, and Fig. 3 is an enlarged side view of the same part. while covering the base frame 3
A transmission case 5, which is a traveling transmission, is provided at the rear end, and an axle case 6, which is a transmission case, is integrally connected to both left and right sides of the rear end of the transmission case 5. Left and right front wheels 8 for running in paddy fields are supported on both sides of the front left and right sides of the transmission case 5 via axle frames 7, and left and right rear wheels 9 for running in paddy fields are supported on the outside of the rear part of each transmission case 6, respectively. A driver's seat on which a worker sits is attached to the upper part of an axle case 6 via a driving frame 11. In addition, there are spare seedling stands 1 on both the left and right sides of the bonnet 4.
At the same time, a steering handle 13 is provided at a position in front of a driver's seat 10 at the rear of the bonnet 4, and the upper side of the transmission case 5 at the rear of the bonnet 4 is covered by a vehicle body cover 14 forming a step 14a.

Furthermore, 15 in the figure is a planting section equipped with a seedling stand 16 for row planting, a plurality of planting claws 17, etc.
8 and the planting case 20 via the guide rail 19
The planting claw 17 is attached to the planting case 20 via a planting arm 21 that is supported so as to be slidable in left and right reciprocating motion and is moved by a crank, and a planting claw drive shaft 22. A main float 23 for leveling the planting surface, which is a sliding body, and left and right side floats 24, 24 are installed below the planting case 20, and a link hit 25 is installed on the front side of the planting case 20, and the top The link hitch 25 is connected to the operating frame 11 via a three-point link mechanism 28 including a link 26 and a lower link 27, and a hydraulic cylinder 29 for raising and lowering the planting section 15 is interposed between the transmission case 5 and the link mechanism 28. The output of the engine 2 is transmitted to the transmission case 5, and the front and rear wheels 8, 9 for paddy field driving are driven at a substantially constant speed, and at the same time, one seedling is placed on a seedling platform 16 that slides back and forth from side to side. The structure is such that the seedlings are continuously taken out by a planting claw 17 and the seedling planting work is carried out in the field.

As shown in FIG. 8 and FIG.
1. The main shift lever 36, which is a shift operation lever, is interlocked and connected via the shift rod 32, shift arm 35, longitudinal swing fulcrum shaft 34, and left/right swing fulcrum shaft 35, and is aligned with the guide groove 38 of the lever guide plate 37. By swinging the main shift lever 36 back and forth, the driving mode is changed as appropriate to on-road speed, neutral, planting speed, and reverse.

The driving frame 11 also includes a horizontal frame 39 that connects the left and right axle cases 6, 6 via case brackets 6a, 6a, and the horizontal frame 39.
The hydraulic valve 41, which is a planting lifting mechanism that expands and contracts the hydraulic cylinder 29 as appropriate, is connected to the guide plate 37.
The valve bracket 42a is attached to the guide frame 42 of
It is fixedly supported through. Further, a bearing sleeve 43 is fixed to the vertical frames 40a, 40b, and an operation rotation shaft 44 is inserted and supported in the reception sleeve 43, and the right end of the rotation shaft 44 is connected via a horizontal swing fulcrum shaft 45. It is interlocked and connected to a planting lifting lever 46. An operating piece 48a that contacts the spool 47 of the valve 41 is integrally fixed to the rotating shaft 44, and a clutch arm 50 that locks the other end of the planting clutch wire 49 connected to the planting clutch is rotated. The lifting lever 4 is fixed to the shaft 44 and aligned along the guide groove 51 of the lever guide plate 37.
By swinging 6 back and forth, the planting section 1
5 and the planting clutch is turned on and off.

Furthermore, an interlocking arm 52 is fixed to the left end of the rotating shaft 44, and the gear lever 36 is fixed to the left end of the rotating shaft 44.
An interlocking pin 54 is supported in the middle through a holder 53, and when the shift lever 36 is operated to swing from the forward position to the reverse position, the tip of the interlocking pin 54 is engaged with the interlocking arm 52, and the rotation The operating piece 48a is integrally rotated via the shaft 44 to retract the spool 47 and raise the planting portion 15. The pin 54 is inserted into the holder 53 fixed to the middle of the speed change lever 36 and supported so as to be slidable in the axial direction of the rotating shaft 44. A compression spring 56 is inserted between the spring seat 55 attached to the pin 54 and the holder 53. The tip of the pin 54 is normally provided so as to protrude toward the interlocking arm 52 side, and when the shift lever 36 is tilted slightly to the right to switch from the forward planting position to the reverse position, the lift lever 46 is lowered. In this position, the tip of the pin 54 is engaged with the front end of the interlocking arm 52 to rotate the rotating shaft 44, thereby converting the elevating lever 46 into the raised state and operating the hydraulic valve 41, which is the elevating mechanism. It raises the planting part 15, and is provided so as to be freely adjustable in position in the interlocking movement direction with an interlocking arm 52 that interlocks and connects the traveling speed change lever 36 and the planting lift lever 46, and the position of each lever 36, 46 by the interlocking arm 52 is The interlocking timing is configured to be freely adjustable.
Further, the lift lever 46 is biased by a fulcrum cross-over spring 57, and is configured to maintain the lever 46 in that position when the lever 46 is changed from the lowered position to the raised position or from the disengaged position of the planting clutch to the engaged position. are doing.

Further, the lifting lever 46 is connected to the guide groove 5.
By swinging the front end of 1 along the left and right horizontal grooves 51a, the marker operating wire 61 is tensioned or relaxed via the engagement link 58, fulcrum shaft 59, and marker operating arm 60, and the left or right muscle is moved. The pull marker 62 is configured to protrude to the left and right outer sides of the fuselage or to be housed inside the fuselage. In addition,
A spring 64 for returning the marker to neutrality is stretched between the receiving metal fitting 63 fixed to the right end of the rotating shaft 44 and the lifting lever 46.

Further, another operating piece 48b, which is adjacent to the operating piece 48a and has one end in contact with the spool 47, is freely rotatably supported on the rotating shaft 44, and one end is connected to the main float 23. The other end of the sensor wire 65 is connected to the operation piece 48b via the float sensitivity adjustment lever 66,
The spool 47 is moved back and forth as appropriate in accordance with changes in the ground pressure of the float 23, and the planting section 15 is automatically controlled to maintain the ground pressure of the float 23 substantially constant, and the adjustment lever 66 is swung. The structure is such that the sensitivity of the load applied to the float can be adjusted according to the hardness of the topsoil (dry field, wet field), standard hardness, etc. by operation.

By the way, as shown in FIGS. 8 to 4, the front end of the left and right axle cases 6, 6 are connected to the transmission case 5 and the tip receiver 67, and the middle part is connected to the side plate 68 of the operating frame 11, which serves as the exterior of the aircraft. By supporting them and connecting them at these three locations, they are constructed to improve their mutual strength and to reduce the overall weight.

Further, the side plate 68 has a link insertion hole 69 for the main shift lever 36 and an insertion hole 70 for the rotating shaft 44, and the main shift lever 3 is provided on the left outer side of the side plate 68.
6 and the interlocking arm 52, and the side plate 6
Shift rod 3, which is a speed change link mechanism, is located inside of 8.
2, the shift arm 33, and the rotating shaft 44, and by installing the shift link mechanisms 32, 33 other than the main shift lever 36, the operating pieces 48a, 48b, etc. inside the body, muddy water can be prevented from entering these operating parts. - Constructed to avoid rainwater intrusion and adhesion and maintain smooth operation.

Furthermore, the longitudinal swing fulcrum shaft 34 of the shift link mechanisms 32, 33 is attached to a bracket 71 fixed to the upper part of the left axle case 6, so that the longitudinal swing fulcrum of the main shift lever 36 is located at the maximum distance from the operating position of the axle case 6. By providing the upper part of the lever 3, the operating stroke is increased and the amount of operating displacement is increased, and the rigidity of the attachment part of the fulcrum shaft 34 is increased.
The structure is designed to improve the support strength of 6.

Furthermore, as shown in FIGS. 4 and 6, a tension spring 74 is tensioned between the main shift lever 36 and the shift arm 33 via a fixing plate 72 and a spring piece 73. By constantly applying a spring force to the left outer side of the machine body, the lever 36 is engaged and held in each gear change notch 38a formed on the left side of the lever guide groove 38, and even if the lever 36 is accidentally operated. The lever 36 is configured to reliably hold the lever 36 at the shift position even if it comes into contact with a person or a seedling box.

Further, as shown in FIGS. 3 and 8, the shift rod 32 is attached to the shift arm 33 so that its attachment length can be freely adjusted. It is formed in the adjustment part 17 that is connected to the main gear shift lever 36 to vary the relative position of the main gear shift lever 36.
By providing this adjustment portion 77 at a position close to the lower part of the main shift lever 36 and facing the insertion hole 69, each shift knot 38a of the guide groove 38 can be adjusted.
The main shift lever 36 is configured to be easily adjusted from the outside.

Further, as shown in FIGS. 4, 5, and 8, the interlocking arm 52 is attached to a fixed mounting plate 78 fixed to the left end of the rotating shaft 44 through a bolt 79 and an elongated hole 80 so that the mounting angle can be adjusted and the linkage arm 52 can be attached or removed. The main shift lever 36 and the lift lever 46 are fixed together so that the relative interlocking positional relationship between the main shift lever 36 and the elevation lever 46 can be adjusted, and the interlocking of these levers 36 and 46 can be released by removing the mounting plate 78. It consists of

On the other hand, as shown in FIGS. 5 and 6, the planting clutch wire 49 is directly attached to the planting lifting lever 46 via a clutch pin 81 and a clutch arm 50, eliminating the need for an existing clutch link. By doing so, the time lag of the planting clutch and the operating force of the lever 46 are reduced.

This embodiment is constructed as described above, and by operating the lift lever 46 back and forth at the rear part of the guide groove 51, the spool 47 of the hydraulic valve 41 is moved via the operation piece 48a. While raising, lowering or fixing the attaching part 15, the planting clutch is "in" via the clutch wire 49 by operating the front part of the guide groove 51 back and forth.
The switch is turned off. Moreover, the horizontal groove 5
By operating the lift lever 46 left and right along the line 1a, the lever 46 is engaged with the engagement link 58, and the link 58 is swung so that the left or right streak marker 62 is projected to the outside of the aircraft body as appropriate. After operating the marker 62, the elevator lever 4
When the spring 6 is in a free state, the spring 6
The lever 46 is always returned to the marker neutral position by the spring force of 4.

On the other hand, by operating the main shift lever 36 back and forth around the fulcrum shaft 34, the shifter 30 in the transmission case 5 is changed via the shift rod 32 and shift arm 33, which are the shift link mechanism, to perform forward and forward gear shifts. When the planting lift lever 46 is in the lowered state during planting work and the main shift lever 36 is switched from the planting position to the reverse position, the interlocking pin 54 engages with the interlocking arm 52. As the main shift lever 36 is swung to the reverse position, the interlocking arm 52 is rotated and the rotation shaft 4
Rotate 4. As a result, the lift lever 46 in the lowered position is operated in conjunction with the operation piece 48.
The planting part 15 is raised by retracting the spool 47 of the hydraulic valve 41 through the a and extending the hydraulic cylinder 29, and when traveling in reverse, the planting part 15 is always in the raised state to ensure safety. This is something that can be improved.

and the speed change link mechanism 3 of the main speed change lever 36.
2 and 33 within the exterior of the aircraft body between the left and right side plates 68 and 68, the gear shift link mechanisms 32 and 33 are protected from muddy water and rainwater, enabling smooth and accurate gear shifting operations. . In addition, by connecting the shift rod 32 of the speed change link mechanism to the transmission case 5 along the upper part of the axle case 6, the transmission case 5 can be connected through the shortest course without causing any other obstacles. It has excellent strength, reliable operability, and an extremely compact structure.

Furthermore, by providing the adjusting section 77 on the main shift lever 36 to match the guide groove 38 inside the fuselage exterior near the lower part of the main shift lever 36 (that is, inside the side plate 68), the adjusting section 77 can be directly removed from muddy water or rainwater. Therefore, the inconvenience of being unable to adjust due to rust is eliminated.In the adjustment work, while checking the guide groove 38 at the main gear shift lever 36 position, insert it through the insertion hole 69 from the outside. This is something that can be done easily.

Furthermore, the interlocking arm 52 is connected to the rotating shaft 44.
By attaching the main shift lever 3 separately to
6 and the planting lift lever 46 can be adjusted, and as a result, the raising operation of the planting part 15 by the main shift lever 36 can be adjusted,
By removing the interlocking arm 52, the interlocking of these levers 36, 46 can be released, and the levers 36, 46 can be operated individually.

As is clear from the above embodiments, the present invention provides an interlocking arm 52 that interlocks and connects the traveling speed change lever 36 and the planting lift lever 46, the position of which is freely adjustable in the direction of interlocking movement. The interlocking timing of the levers 36, 4 can be freely set.
By adjusting the position of the interlocking arm 52 after assembling 6 and these operation systems, the interlocking timing of each lever 36, 46 by the interlocking arm 52 can be easily obtained by a simple setting adjustment. , 46, etc., as well as the initial setting of the operating feel, etc., and it is possible to easily improve the interlocking function and handling operability of the levers 36, 46 compared to the past. It is possible.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is an overall side view of the riding rice transplanter, Fig. 2 is a plan view of the same, Fig. 3 is a partial side view of the same, and Fig. 4 is a main part of the machine. 5 is an explanatory plan view of the same, FIG. 6 is an external perspective view of the same, and FIGS. 7 to 8 are explanatory views of the lever portion. 36... Travel speed change lever, 46... Planting lift lever, 52... Interlocking arm, 54... Interlocking pin.

Claims (1)

[Scope of utility model registration request] An interlocking arm 52 that interlocks and connects the traveling speed change lever 36 and the planting lift lever 46 is provided so as to be adjustable in position in the direction of interlocking movement, and the interlocking timing of the respective levers 36 and 46 by the interlocking arm 52 can be freely set. A traveling transmission device for a riding rice transplanter, which is characterized by: