JPH0627462U - Mobile agricultural machinery - Google Patents

Abstract

(57) [Abstract] [Purpose] The mission case 15 is attached to the front axle 5
The case 15 is connected to the swing holders 11 and 12 that are arranged close to the side and supports the axle 5, and the conventional front weight and the like can be eliminated, while the position when the case 15 and the holders 11 and 12 are assembled. Aligning is easy, and even if the airframe 1 bends, the case 15
It is possible to prevent the connection portion between the holders 11 and 12 from being damaged. [Structure] A pair of front and rear swing holders 11 and 1
2 is provided to swingably support the front axle 5, and the engine 3 is provided on one side of the holders 11 and 12 in the front-rear direction.
The transmission 15a interlocked with the transmission 15a is provided, and the fitting case 18 and one of the holders 11 and 12 facing the case 15 are provided with the fitting coupling portions 18 that regulate the relative position by fitting coupling.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mobile agricultural machine such as a four-wheel drive rice transplanter, and more particularly to a mobile agricultural machine in which a front axle equipped with front wheels is swingably supported with respect to the machine body about a longitudinal axis of the machine body.

[0002]

[Prior art]

 Conventionally, a mobile agricultural machine of this type is provided with a pair of front and rear swing holders on a machine body, and a front axle having front wheels is swingably supported on each of these swing holders so as to be swingable around a longitudinal axis of the machine body. By installing an engine in the front part of the vehicle and installing a transmission case in the rear of which the transmission interlocking with the engine is installed, and by coupling the output shaft protruding from this transmission case to the input shaft of the front axle, Rotational power from the engine is transmitted to the front wheels via the transmission and the front axle.

[0003]

[Problems to be solved by the device]

 By the way, in mobile agricultural machines such as four-wheel drive rice transplanters, the rear side of the machine body is usually heavy and has a rear load. Therefore, it is necessary to provide a front weight and the like separately on the front side of the machine body. Although it was a cause of increasing the number of points and complicating the structure, in order to eliminate this front weight etc., the mission case was placed near the front axle on the front side of the aircraft. However, it is conceivable that the mission case is coupled to one side of each of the swing holders supporting the front axle with bolts or the like.

[0004] By the way, although the airframe itself has rigidity, since the longitudinal length is long, bending occurs in the longitudinal direction.As described above, the mission case is close to the front axle. When connecting the transmission case and the swing holder by bolts, the joint portion will be affected by the bending of the airframe, and the output and input shafts of the transmission case and front axle will be affected. Not only accurate accuracy is required for centering, but also accurate accuracy is required for alignment between the mission case and the swing holder, which causes a problem that assembly workability deteriorates. At the same time, when bending occurs in the machine body, the load concentrates on the bolt joint between the mission case and swing holder, and this joint breaks. Problems such as loss have occurred.

An object of the present invention is to dispose a mission case on the front side of a machine body in proximity to a front axle, and to connect the mission case to a swing holder that supports the front axle. The front weight, which had to be provided on the side, can be eliminated, and the workability can be improved by easily aligning the mission case and swing holder during assembly. It is an object of the present invention to provide a mobile agricultural machine capable of reliably preventing the connecting portion between the mission case and the swing holder from being damaged even if the machine body is flexed.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a mobile agricultural machine in which a front axle 5 having front wheels 6 is swingably supported with respect to a machine body 1 about a longitudinal axis of the machine body. Swing holders 11 and 12 are provided to swingably support the front axle 5, and a transmission 15a interlocking with the engine 3 is provided to one side of the swing holders 11 and 12 in the front-rear direction. The mission case 15 and one of the swing holders 11 and 12 facing the mission case 15 are provided with a fitting joint portion 18 that regulates a relative position by a fitting joint.

[0007]

[Action]

 In the above mobile farm, since the heavy mission case 15 is arranged on the front side of the machine body in proximity to one side of the front axles 11 and 12, and the center of gravity of the machine body 1 is moved to the front side, It is possible to eliminate the conventional front weight and the like which have caused an increase in the number of parts and a complicated structure, and moreover, the mission case 15 and the swing holder 11 facing the mission case 15 or Since a fitting joint portion 18 for restricting the relative position of the two is provided between the two, the position of the transmission case 15 and the swing holder 11 or 12 is adjusted when the assembly is performed. It can be easily performed through the spigot joint portion 18, and the assembling workability thereof can be improved, and further, the machine body 1 can be operated during work traveling. When a bending or the like occurs, the bending or the like can be absorbed by the fitting / coupling portion 18, and the connecting portions of the swing holders 11 and 12 or the connection between the swing holders 11 and 12 and the mission case 15 can be connected. It is possible to reliably prevent damage to parts and the like.

[0008]

【Example】

 FIG. 3 shows a four-wheel drive rice transplanter as an example of a mobile agricultural machine. This rice transplanter has an engine 3 covered with a bonnet 2 on the upper front part of the machine body 1, and the front-back direction of the machine body 1. A driver's seat 4 including a control seat 41 and a steering handle 42 is provided in the upper middle part, and a front side of the machine body 1 extends in the machine body width direction and has an axis in the front-rear direction with respect to the machine body 1. It supports a front axle 5 that can be swung to the left and right at the center, and supports a pair of left and right front wheels 6 that interlock with the engine 3 on both sides of the front axle 5 in the longitudinal direction, while at the rear side of the machine body 1. Respectively support a pair of left and right rear wheels 8 that interlock with the engine 3 via rear axles 7 extending in the machine width direction. A spare seedling mount 2a is provided on the upper front side of the machine body 1 on both left and right sides of the bonnet 2.

Further, at the rear part of the machine body 1, a seedling planting device 10 is supported in a vertically movable manner via a parallel link mechanism 9 having a top link 91 and a pair of left and right lower links 92. The seedling planting device 10 includes a planting case 10a to which rotational power is transmitted from the engine 3, a plurality of transmission cases 10b supported so as to be able to transmit power in the machine body width direction of the planting case 10a, and the transmission case. A plurality of planting claws 10c that are rotatably supported by the case 10b, a plurality of floats 10d that receive and support the entire load of the planting device 10, and a whole seedling stand 10e that is reciprocally moved in the machine width direction. And so on.

Therefore, in the above rice transplanter, as is clear from FIGS. 1 to 3, a pair of front and rear first and second front and rear portions are provided at the supporting portion of the front axle 5 at the lower front position of the body 1. 2 Swing holders 11 and 12 are provided, and the front axle 5 is swingably supported around the longitudinal axis of the swing holders 11 and 12 in the machine width direction, and the engine 3 in the machine body 1 is supported. A gear case 14 in which a transmission mechanism that is interlocked with the engine 3 via a continuously variable transmission 13 is provided is provided on the rear side, and a transmission 15a is provided on the rear side of the front axle 5 at a rear position of the gear case 14. A transmission case 15 in which the interior of the transmission is disposed close to each other, and the transmission mechanism in the gear case 14 and the transmission 15a are connected via a transmission shaft 16. On the front side of the transmission case 15, a first output shaft 17 is provided which projects toward the front of the machine body. The first output shaft 17 is interlocked with an input shaft 51 provided on the front axle 5. The rotational power of the engine 3 transmitted to the gear case 14 side is transmitted to the front axle 5 side from the transmission 15a via the first output shaft 17 and the input shaft 51 to rotate the front wheel 6. Try to drive it. The continuously variable transmission mechanism 13 has continuously variable transmission and input pulleys 13a and 13b provided on respective shafts of the engine 3 and the gear case 14, and a belt 13c wound between the pulleys 13a and 13b. The belt 13c is composed of a tension pulley 13d for applying a tension.

More specifically, as is apparent from FIG. 1, the front axle 5 has a transmission shaft 52 reaching the front wheel 6 therein and a transmission gear 53 fixed on the transmission shaft 52. A shaft portion 54 that rotatably supports the first swing holder 11 is integrally projectingly provided at a front portion outside the front axle 5, and at a rear portion side of the front axle 5. , A tubular body 55 projecting rearward is fixed coaxially with the shaft portion 54 via a plurality of fixing bolts BT, and is attached to the inside of the tubular body 55 to the transmission gear 53 on the front end side in the longitudinal direction. The above-mentioned input shaft 51 having an input gear 56 that constantly meshes is rotatably supported via a plurality of bearings B, and the rear end side of the input shaft 51 and the first output shaft 17 extending forward from the transmission 15a. And The rotary power from the first output shaft 17 is connected to the front wheel 6 side via the input shaft 51 and the transmission shaft 52 in the front axle 5.

Further, the first and second swing holders 11 and 12 are fixedly supported by the gear case 14 and the body 1 at the front and rear portions of the front axle 5, respectively. Since the shaft hole 11a capable of receiving the shaft portion 54 projected from the front side of the front axle 5 is formed, and the shaft portion 54 is inserted and supported in the shaft hole 11a with the metal bearing M interposed. On the other hand, the second swing holder 12 is formed into a tubular shape as a whole, and the front side of the second swing holder 12 is fixedly supported to the machine body 1 via a bracket 12a, and the swing holder is also provided. The cylindrical body 55, which is fixed to the rear side of the front axle 5, is rotatably supported in the inside of 12 via a metal bearing M. As described above, the shaft portion 54 and the cylindrical body 55, which are coaxially provided in the front and rear portions of the front axle 5, are rotatably supported via the first and second swing holders 11 and 12. Thus, the entire front axle 5 can be swung in the machine width direction about the shaft portion 54 and the cylindrical body 55.

Then, the mission case 15 is arranged on the front side of the machine body in close proximity to the front axle 5, and more specifically, the rear position of the second swing holder 12 supporting the rear side of the front axle 5. And a fitting joint portion 18 (hereinafter referred to as a spigot joint portion) by means of a spigot is provided on the front side of the mission case 15, and the spigot joint portion 18 of the second swing holder 12 is provided. The swing holder 12 and the mission case 15 are inserted into the rear end opening side, and the spigot case 15 is spigot-coupled with each other, so that the relative positions of the both are regulated.

As described above, the mission case 15 is adjacent to the rear position of the second swing holder 12 supporting the rear side thereof near the front axle 5 arranged on the front side of the airframe 1. By arranging the transmission case 15, which is made heavy, in close proximity to the front axle 5, the center of gravity of the body 1 is moved to the front side. It is possible to abolish the conventional front weight, which had been the cause of increasing the number of parts and complicating the structure. Further, a spigot joint portion 18 is provided on the front side of the mission case 15, and the spigot joint portion 18 is spigot-joined to the rear end opening side of the second swing holder 12, so that the swing holder 12 and the mission are connected. By regulating the relative position with respect to the case 15, it is possible to easily align the two when they are assembled, through the spigot joint portion 18, and to improve the workability of the assembly. In addition, when a bending or the like occurs in the machine body 1 during work traveling, the bending or the like can be absorbed by the spigot connecting portion 18, and the connecting portions of the first and second swing holders 11 and 12 or It is possible to reliably prevent the connecting portion between the second swing holder 12 and the mission case 15 from being damaged.

Further, as shown in FIG. 1, spline portions 17a and 51a are formed on the shaft end sides of the first output shaft 17 and the input shaft 51, respectively. A cylindrical joint 19 having a spline groove 19a that can be engaged with 51a and is relatively movable is provided, and the first output shaft 17 and the input shaft 51 can be connected via this joint 19. Preferably, in such a case, when the body 1 is bent or the like, the spline groove 19a of the joint 19 and the spline portions 17a, 51a of the first output shaft 17 and the input shaft 51 are provided. It is possible to absorb the bending of the machine body 1 and prevent the shafts 17 and 51 from being damaged, and further, to prevent the shafts 17 and 51 from being damaged between the first output shaft 17 and the input shaft 51. Even if there is a centering processing error of the dried fish, the error can be absorbed by the joint 19 and the input and output shafts 17 and 51 can be reliably coupled, and the workability of assembly can be improved.

Further, as shown in FIGS. 1 and 2, second and third output shafts 20 and 21 projecting toward the rear of the body are provided from the rear side of the mission case 15, respectively. 2 The output shaft 20 is interlocked with the transmission mechanism in the rear axle 7 to drive the rear wheel 8 to rotate, while the third output shaft 19 is connected to the transmission mechanism in the planting case 10 a of the seedling planting device 10. The drive parts of the seedling planting device 10 are driven in conjunction with each other.

In the above-described embodiment, the mission case is located at a rear position of the second swing holder 12 arranged on the rear side of the body of the first and second swing holders 11 and 12 so as to be close to the swing holder 12. 15 is provided, and a spigot joint portion 18 for splicing the mission case 15 to the second swing holder 12 is provided on the front side of the mission case 15. However, in the present invention, the mission case is provided. 15 is arranged at a front position of the first swing holder 11 arranged on the rear side of the machine body and close to the swing holder 11, and the mission case 15 is arranged on the front side of the mission case 15 with the first swing. The holder 11 may be provided with a spigot coupling part 18 for spigot coupling, or the spigot coupling part 1 8 is not limited to the mission case 15, but may be provided on the swing holders 11 and 12 side.

Further, in the embodiment of FIG. 3, the vertical lifting cylinder 22 of the seedling planting device 10 is provided on the rear side of the machine body 1, and the piston rod 22 a of the cylinder 22 constitutes the parallel link mechanism 9. By connecting to the support frame 93 provided on the front side of the top link 91 and the lower link 92, the pressure fluid is supplied to and discharged from the cylinder 22 to move the piston rod 22a forward and backward, thereby the parallel link. Although the whole seedling planting device 9 is configured to be moved up and down via the mechanism 9, the cylinder 22 has its mounting base side supported on the machine body 1 via the torsion bar 23. preferable. In this case, since the vibration applied to the cylinder 22 can be damped by the torsion bar 23 having a simple structure, compared to the conventional case where a complicated shock absorbing mechanism such as a shock absorbing spring or a spring bearing is separately provided, It is possible to simplify the entire configuration of the mounting portion of the cylinder 22.

[0019]

[Effect of device]

 As described above, in the mobile agricultural machine of the present invention, the body 1 is provided with the pair of front and rear swing holders 11 and 12, and the front axle 5 having the front wheels 6 can be swung through the respective swing holders 11 and 12. A transmission 15a is provided on one side of the swing holders 11 and 12 in the front-rear direction, which is interlocked with the engine 3, and the transmission case 15 of the transmission 15a and the swing holder 11 facing the transmission case 15 are provided. Since the spigot joint portion 18 that regulates the relative position by the spigot joint is provided on one of the front and rear ends of the front axles 11 and 12, one of the front axles 11 and 12 is located close to the front side of the airframe. Since the center of gravity of the airframe 1 is moved to the front side, the number of parts is increased and the structure is increased. It is possible to eliminate the conventional front weight, which has been a cause of complication, and moreover, between the mission case 15 and the swing holder 11 or 12 facing the mission case 15. Since the fitting joint portion 18 that regulates the relative positions of the two is provided, the fitting joint portion 18 is fitted to the position when the mission case 15 and the swing holder 11 or 12 are assembled. The assembly workability can be improved, and in addition, when the machine body 1 is warped during work traveling, the warpage or the like can be performed. Can be absorbed by the swing holders 11 and 12 and the swing holders 11 and 12 and the mission case 15 described above. Like binding site can be reliably prevented from being damaged.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a main part of a mobile agricultural machine according to the present invention.

FIG. 2 is a simplified plan view showing an arrangement configuration of the mobile agricultural machine.

FIG. 3 is a side view showing the overall structure of a four-wheel drive rice transplanter as an example of a mobile agricultural machine.

[Explanation of symbols]

 1 Aircraft 3 Engine 5 Front Axle 6 Front Wheel 11 Swing Holder (1st) 12 Swing Holder (2nd) 15 Mission Case 15a Transmission 18 Inlay Joint

Claims (1)

[Scope of utility model registration request] 1. A mobile agricultural machine in which a front axle 5 having front wheels 6 is swingably supported with respect to a machine body 1 about a longitudinal axis of the machine body, and a pair of front and rear swing holders 11 and 12 are attached to the machine body 1. The swing holder 11 is provided to support the front axle 5 so that the front axle 5 can swing.
A transmission 15 a that is linked to the engine 3 is provided on one side in the front-rear direction of the transmission 12.
a of the mission case 15 and the mission case 15
To one of the swing holders 11 and 12 facing each other,
A mobile agricultural machine, characterized in that a fitting joint part (18) for regulating the relative position by fitting connection is provided.