JP5744618B2 - Rice transplanter steering column - Google Patents

Description

  The present invention provides a steering handle that protrudes from a dashboard provided in a bonnet, a steering shaft that rotatably supports the steering handle, and a steering column that covers the steering column, and a lower end of the steering shaft that is connected to a torque generator. The connecting portion is related to a rice transplanter in which a lower end portion of a steering shaft with a collar attached is mounted on a torque generator via a mounting flange, and the steering shaft is supported by the torque generator. Is formed with a plurality of collar side openings on the bottom peripheral surface in contact with the top surface of the torque generator, and at the bottom of the mounting flange is formed with a mounting flange side opening communicating with the collar side opening. In the torque generator connection It related to the occurrence prevention and grease injection work to facilitate the planting machine.

  In conventional rice transplanters, the lower end of the steering shaft that penetrates the steering column is inserted and connected to the torque generator, and a steering wheel is provided above the steering shaft. The torque generator is connected to the torque generator at the connecting portion between the torque generator and the steering shaft. In order to prevent an excessive load from being applied to the steering wheel, a collar is mounted around the lower part of the steering shaft on the torque generator, and the lower end portion of the steering shaft with the collar mounted is mounted on the torque generator via a mounting flange. Some have a shaft supported by a torque generator. (For example, Patent Document 1)

JP-A-8-207785

However, in the rice transplanter as described above, muddy water bounced off from the field or rainwater due to rainfall invades from the opening formed in the upper part of the steering column covering the steering shaft through the opening of the dashboard, After flowing down along the inner wall of the column, the water stays in the gap between the collar and the mounting flange, and rust is generated at the connecting part of the steering shaft, such as the collar, mounting flange, and torque generator. The operation may be adversely affected and frequent maintenance must be performed. The connecting part is coated with lubricating oil such as grease in order to prevent water from entering the torque generator and to smoothly rotate the steering shaft. Many members such as columns, collars, and mounting flanges have to be removed to expose the connecting portion. For these reasons, there is a problem that workability is poor.
SUMMARY OF THE INVENTION An object of the present invention is to provide a rice transplanter that prevents rusting of a connecting portion between a steering shaft and a torque generator and improves the workability by facilitating grease injection.

Therefore, according to the first aspect of the present invention, the lower end of the steering shaft that covers the steering column on the steering handle shaft is connected to the torque generator via a connecting portion, and the steering portion with the collar mounted on the connecting portion. In the rice transplanter in which the lower end portion of the shaft is supported by the torque generator via a mounting flange, the collar forms an opening in a bottom peripheral surface in contact with the upper surface of the torque generator, and a bottom portion of the mounting flange In addition, an opening that communicates with the opening is formed , and a labyrinth shape is formed in the upward direction so that grease can be injected from the opening on the mounting flange side and the water does not easily enter. And

  According to a second aspect of the present invention, in the rice transplanter according to the first aspect, a labyrinth shape is formed by assembling each of the collar side opening and the attachment flange side opening.

According to a third aspect of the present invention, in the rice transplanter according to any one of the first to second aspects, one or a plurality of the collar side openings and the mounting flange side openings are formed. .

  According to the first aspect of the present invention, the lower end of the steering shaft that covers the steering column on the steering handle shaft is connected to the torque generator via the connecting portion, and the lower end of the steering shaft that is fitted with the collar is connected to the connecting portion. In the rice transplanter in which the portion is supported by the torque generator via the mounting flange, the collar forms an opening in the bottom peripheral surface in contact with the top surface of the torque generator and communicates with the opening at the bottom of the mounting flange. Since the opening is formed, the muddy water that has entered from the opening formed in the upper part of the steering column through the opening of the dashboard and has flowed along the inner wall of the steering column and bounced from the field, rain water from rain, etc. These collars and mounting flanges do not stay in the gap between the collar and mounting flange. It is possible to prevent the rusting of the steering shaft connecting section such as a torque generator. The collar side opening and the mounting flange side opening can also be used as an inlet for grease applied to the contact portion of the torque generator and the steering shaft. When replenishing the contact portion with grease, both the collar and the mounting flange are provided. The grease can be easily injected through the opening. Therefore, a rice transplanter with improved operability and workability can be provided.

  According to the second aspect of the present invention, the labyrinth shape is formed by assembling the collar side opening and the mounting flange side opening, so that the mounting flange side opening to the collar side opening is complicated. Even if muddy water that bounces off the field, rainwater from rain, etc. enters the mounting flange from the opening on the mounting flange side, it does not reach the connection part and the steering shaft, and the connection part and the steering shaft rust. Sticking can be prevented. Therefore, a rice transplanter with improved operability and workability can be provided.

In addition , since the labyrinth shape is configured upward so that grease can be injected from the opening on the mounting flange side into the connecting part and water does not easily enter, the direction from the opening on the mounting flange side to the opening on the collar side is different. Even if muddy water that bounces off from the field or rainwater due to rain enters the mounting flange from the opening on the mounting flange, it can reach the connection and the steering shaft. Reaching can be prevented, and rusting of these connecting portions and the steering shaft can be prevented. Therefore, a rice transplanter with improved operability and workability can be provided.

According to the third aspect of the present invention, since one or a plurality of collar side openings and mounting flange side openings are formed, even if one opening is formed in the mounting flange, this opening The grease can be easily injected into the steering shaft from the opening through the collar side opening. However, by forming a plurality of openings in the mounting flange, the grease can be injected into the steering shaft from any direction. . Therefore, a rice transplanter with improved workability can be provided.

It is the whole rice transplanter side view as an example of this invention. It is a perspective view of a dashboard which shows the arrangement position of a steering member. It is a perspective view of a steering member. It is an expansion perspective view of the connection part of a steering shaft and a torque generator. It is an expansion perspective view of a mounting flange. It is an expansion perspective view of the connection part which removed the attachment flange. It is an expansion perspective view of a color. It is a side surface schematic diagram of a connection part. It is a cross-sectional side view of a connection part. It is an expansion perspective view of the attachment flange which formed multiple openings. It is the perspective view which looked at the rotor transmission shaft periphery which shows an example as a drive shaft from the downward direction.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is an overall side view of a rice transplanter as an example of the present invention, and FIG. 2 is a perspective view of a dashboard showing an arrangement position of a steering member.

  The rice transplanter 1 of the present application is a vehicle on which an operator is boarded, and a four-row planting will be described as an example. As shown in FIGS. 1 and 2, the engine 2 is mounted on a body frame 3, and a front case 6 is supported in front of a mission case 4 that is elongated in the front-rear direction via a front axle case 5. 4. Rear wheel 8 for paddy field traveling is supported on rear axle case 7 at the rear.

  The spare seedling platforms 10 are attached to both sides of the bonnet 9 that covers the engine 2 and the like, and the transmission case 4 is covered with the vehicle body cover 11 on which the operator rides. 13 is attached, and a steering handle 14 is provided at the rear of the hood 9 in front of the driver's seat 13.

The planting part 15 includes a seedling mounting table 16 for four-row planting, a plurality of seedling planting claws 17, and the like. causes rotatably supported on the left and right reciprocation to the lower rail 18 and the guide rail 19 planting frame 20 via a power from the PTO shaft 33 which is obtained through the center case 31, Ru is constant speed in one direction the filtrate Tarikesu 21 is supported on the planting frame 20, it is disposed a pair of claws case 22 at symmetrical positions around the rotational axis of the rotary case 21, mounting NaeUe claw 17 on the pawl case 22 tip It is done.

  In addition, the right and left side frames 23 are erected on both the left and right ends of the planting frame 20 to support the seedling table 16, and the hitch bracket 24 at the center of the planting frame 20 on the left and right is a lifting mechanism including a top link 25 and a lower link 26. 27, the hydraulic lift cylinder 28 provided on the vehicle is connected to the lower link 26, and when the lift cylinder 28 is driven, the planting portion 15 is lifted and lowered via the lift mechanism 27. When the planting part 15 is lowered, one seedling is taken out from the seedling mount 16 that is reciprocated to the left and right by the planting claws 17 so that seedling planting work can be continuously performed.

  Reference numeral 29 is a main speed change lever, 30 is a seeding lever that enables operations such as stopping at the boarding position of the aircraft and the position of getting off the aircraft, 32 is a main clutch pedal, 34 is a center float, 35 is a side float , 36 is a fertilizer applicator, and 37 is an auxiliary wheel provided outside the rear wheel 8.

  Further, the fertilizer applicator 36 is provided with a fertilizer hopper 38 for supplying fertilizer, a fertilizer feeding case 39 which is a fertilizer feeding portion for supplying fertilizer, and a side groove grooving device 40 for the floats 34 and 35 via a flexible conveying hose 41. A turbo blower type blower 42 for discharging fertilizer and a cylindrical air tank 43 are provided. The blower 42 is attached to the right end of the air tank 43, and a fertilizer feeding case 39 is disposed on the upper side of the air tank 43. The upper end of the seedling stage 16 is arranged close to the rear side.

  Further, as shown in FIG. 2, a dashboard 51 provided with panels, various switches and instruments is attached to the rear upper surface of the bonnet 9, and a steering handle 14 is projected above the dashboard 51. Yes.

  An upper shaft 53 of the steering shaft 52 is connected to the center portion of the steering handle 14 toward the lower side in the dashboard 51, and the upper shaft 53 is connected to the steering shaft 52 via a universal joint 54. The lower shaft 55 is coupled to the lower shaft 55, and a steering column 56 having an opening O formed at the upper end is covered with the lower shaft 55. In FIG. 2, for convenience of explanation, members around the bonnet 9 such as the preliminary seedling stage 10 are removed.

  Next, the structure of the steering member in the rice transplanter of the present invention will be described. 3 is a perspective view of a steering member, FIG. 4 is an enlarged perspective view of a connecting portion between a steering shaft and a torque generator, FIG. 5 is an enlarged perspective view of a mounting flange, and FIG. 6 is an enlarged perspective view of the connecting portion with the mounting flange removed. 7 is an enlarged perspective view of the collar, FIG. 8 is a schematic side view of the connecting portion, FIG. 9 is a sectional side view of the connecting portion, and FIG. 10 is an enlarged perspective view of a mounting flange having a plurality of openings.

  As described above, the steering shaft 52 includes the upper shaft 53 and the lower shaft 55, and the lower end portion of the lower shaft 55 generates a rotational force by hydraulic pressure via a connecting portion 57 as shown in FIG. The torque generator 58 is connected. Since the torque generator 58 is a well-known technique, a detailed description thereof is omitted.

  In this connection portion 57, as shown in FIG. 6, a collar 59 is mounted around the lower portion of the lower shaft 55 of the steering shaft 52 on the torque generator 58 in order to prevent an excessive load from being applied to the torque generator 58. The mounting flange 61 is bolted onto the torque generator 58 so as to cover the collar 59, and the steering shaft 52 is supported by the torque generator 58.

  As shown in FIG. 7, the collar 59 has a cylindrical shape made of metal and has an inner diameter that is slightly larger than the outer diameter of the lower shaft 55 and can be detachably fitted to the lower shaft 55. The

  The collar 59 is formed with a plurality of collar-side openings 60 each having a bottom peripheral surface that is in contact with the top surface of the torque generator 58 when the lower shaft 55 is mounted and is opened at equal intervals.

  Further, as shown in FIG. 5, the mounting flange 61 is formed by raising a central portion 62 of a horizontal bottom portion in contact with the upper surface of the torque generator 58 into a cylindrical shape having an inner diameter slightly larger than the outer diameter of the collar 59. And one end of the bottom portion is bent upward. Bolt holes are formed in the bent portion and the bottom portion, and the mounting flange 61 is fixed to the torque generator 58 with the bolt holes in the bottom portion and fixed to a stay (not shown) with the bolt holes in the bent portion.

  The mounting flange 61 is formed with a mounting flange side opening 63 which is opened by cutting out the bottom surface of the horizontal bottom to the cylindrical raised portion of the central portion 62 and communicating with the collar side opening 60. The

  The lower shaft 55 on which the collar 59 is mounted is connected to the torque generator 58, and the mounting flange 61 with the collar 59 fitted to the center portion 62 is bolted onto the torque generator 58 or the like, thereby steering. The shaft 52 is supported by the torque generator 58. The lower shaft 55 is covered with a steering column 56. The steering column 56 and the mounting flange 61 are fixed by welding.

  Through the opening of the dashboard 51, muddy water bounced off the field from the opening O at the upper end of the steering column 56, rainwater from rain, etc. entered the steering column 56 and flowed down along the inner wall of the steering column 56. In this case, as shown in FIGS. 8 to 9, the water enters the gap between the collar 59 and the mounting flange 61, and the mounting flange provided in the mounting flange 61 through the collar side opening 60 provided in the collar 59. It is discharged from the side opening 63 to the outside of the connecting portion 57.

  With this configuration, water that has entered the steering column 56 does not stay in the gap between the collar 59 and the mounting flange 61, and the steering shaft 52 such as the collar 59, the mounting flange 61, the torque generator 58, and the like. It is possible to prevent the rusting of the connecting portion 57 at. For this reason, maintenance of steering operation performance and maintenance frequency can be reduced.

  Further, by assembling each of the collar side opening 60 and the attachment flange side opening 63, the path between the both openings 60, 63 is made into a labyrinth shape L as shown in FIG. This is because the mounting flange 61 forms a mounting flange side opening 63 in the horizontal direction with respect to the upper surface of the torque generator 58, and the collar 59 is connected to the collar side in the substantially vertical direction (upward) via the communication path. An opening 60 is formed.

With such a configuration, the distance from the mounting flange side opening 63 to the collar side opening 60 is given a complicated path (labyrinth shape L) by giving a distance and different directionality, and muddy water bounced off the field, rainwater due to rainfall, be penetrated from the mounting flange side opening 63 in the mounting flange 6 in 1, thwart reach up connecting unit 57 and the steering shaft within 52, it is possible to prevent corrosion of these connecting portions 57 and the steering shaft 52.

  Furthermore, in the collar 59 and the mounting flange 61 of the present invention, the collar side opening 60 and the mounting flange side opening 63 serving as the water outlet provided in each of the collar 59 and the mounting flange 61 can also be used as a grease inlet to the connecting portion 57. it can.

  As shown in FIG. 9, the lower shaft 55 rotates between the lower shaft 55, the collar 59, and the cylindrical raised portion of the central portion 62 of the mounting flange 61, and the rotational torque generator 58 rotates. A grease portion 64 to which grease (lubricant) is applied (stored) is provided in order to seal entry of water and foreign matter into the inside.

  When the grease of the grease part 64 is consumed due to friction or the like, and the grease part 64 is replenished with grease, an inlet (for example, a tube) of a grease replenishing tool is provided from the side of the connecting part 57 from which the steering column 56 is removed. Or a syringe or the like) is inserted into the collar side opening 60 through the attachment flange side opening 63, and the grease 64 is replenished with grease.

  By adopting such a configuration, it is not necessary to remove many members such as the steering column 56, the collar 59, and the mounting flange 61 to expose the connecting portion 57 when replenishing the grease portion 64 with grease as in the prior art. Only the steering column 56 can be removed, and the grease can be easily injected through both the openings 60 and 63 of the collar 59 and the mounting flange 61.

  In the above example, the mounting flange side opening 63 is formed at one position on the bottom surface of the horizontal bottom of the mounting flange 61. However, as shown in FIG. By providing a plurality of similar openings 63 ′ on the other side as appropriate, it is possible to improve the water discharge efficiency and the degree of freedom in the grease replenishment direction.

  The above-described openings 60 and 63 for replenishing the grease in the connecting portion 57 of the steering shaft 52 are not limited to the steering shaft 52 of the steering handle 14 and can be used as a mounting portion of a drive shaft (rotating shaft). FIG. 11 is a perspective view of the periphery of the rotor transmission shaft as an example of the drive shaft as seen from below.

  As shown in the example of FIG. 11, a rotor drive case 70 is formed at the lower part of the center case 31, and the power from the PTO shaft 33 is transmitted to the rotor drive shaft 71 via an intermediate shaft or a driven shaft (not shown). The rotor 72 is rotated by driving the rotor drive shaft 71, and the headland in the field can be leveled.

  Then, the connecting portion 73 between the rotor drive case 70 and the rotor drive shaft 71 may be connected to, for example, a bracket 74 attached to the rotor drive case 70 via a collar (not shown) or the like. By forming one or a plurality of openings (not shown) in the bracket 74 and the collar (not shown), only a plurality of members are removed from the outside without removing many members. Thus, grease or the like can be easily injected into the rotor drive shaft 71. In addition, by forming the opening positions of the bracket 74 and the collar in the same manner as described above, the labyrinth shape L is formed, and direct intrusion of muddy water or the like into the rotor drive shaft 71 is prevented, and the rust of the rotor drive shaft 71 is prevented. Sticking can be prevented.

  Further, in addition to the above, an opening for replenishing grease may be formed in a connecting portion such as the axle of the PTO shaft 33 and the front wheels 6 and the rear wheels 8, and thus a drive shaft (rotation) that requires a lubricant. It can be applied to the connecting part of the shaft.

  As described above in detail, the rice transplanter 1 in this example connects the lower end of the steering shaft 52 with the steering column 56 covering the steering handle shafts 53 and 55 to the torque generator 58 via the connecting portion 57, In the portion 57, the lower end portion of the steering shaft 52 to which the collar 59 is attached is supported by the torque generator 58 via the mounting flange 61, and the collar 59 has an opening 60 in the bottom peripheral surface in contact with the upper surface of the torque generator 58. In addition to the formation, an opening 63 communicating with the opening 60 is also formed at the bottom of the mounting flange 61. In addition, the labyrinth shape L was configured by assembling each of the collar side opening 60 and the mounting flange side opening 63.

  The present invention can be applied to any rice transplanter in which a steering shaft of a steering handle that covers a steering column is connected to a torque generator via a connecting portion.

1 Rice transplanter 14 Steering handle 52 Steering shaft 55 Lower shaft 56 Steering column 57 Connecting part 58 Torque generator 59 Color 60 Collar side opening 61 Mounting flange 62 Center part 63 Mounting flange side opening 64 Grease part L Labyrinth shape

Claims (3)

The lower end of the steering shaft with the steering column covering the steering handle shaft is connected to the torque generator via the connecting portion,
In the connecting portion, in the rice transplanter in which the lower end portion of the steering shaft on which the collar is mounted is supported by the torque generator via a mounting flange,
The collar forms an opening on the bottom peripheral surface in contact with the upper surface of the torque generator, and also forms an opening communicating with the opening at the bottom of the mounting flange .
A rice transplanter characterized in that a labyrinth shape is formed in an upward direction so that grease can be injected into the connecting portion from the mounting flange side opening and water is difficult to enter .   The rice transplanter according to claim 1, wherein a labyrinth shape is formed by assembling each of the collar side opening and the mounting flange side opening. The rice transplanter according to any one of claims 1 to 2 , wherein one or a plurality of the collar side openings and the mounting flange side openings are formed.

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