JP2003165352A - Main speed change lever device for combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a main speed change lever device for a combine harvester capable of always smoothly and surely obtaining a desired set speed even when a traveling load of a machine body is increased. <P>SOLUTION: In this combine harvester, a speed of the traveling machine body 1 is regulated when a hydraulic continuously variable transmission 27 is actuated by operation of this main speed change lever 11. The main speed change lever 11 and the hydraulic continuously variable transmission 27 are interlocked with each other via a worm gear 16 and a worm wheel 23, and the worm gear 16 is connected to the main speed change lever 11 side, while the worm wheel 23 is connected to the hydraulic continuously variable transmission 27 side respectively, so that a driver can quickly carry out a desired speed change operation only by an easy lever operation. As the worm gear 16 and the worm wheel 23 are arranged in the speed change operation path, the speed change regulating operation can be carried out always smoothly and surely, even if a traveling load applied to crawlers in traveling parts 9 and 9 is increased during turning operation and the like of the traveling machine body 1 in a soft field. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main transmission of a combine which operates a hydraulic continuously variable transmission by operating a main transmission lever to adjust the speed of a traveling body. It relates to a lever device. 2. Description of the Related Art Conventionally, in a combine main transmission in which a hydraulic traveling continuously variable transmission is operated by operating a main transmission lever of this kind to adjust the speed of a traveling machine body, L between the transmission lever and the hydraulic continuously variable transmission
They were connected by a link or the like configured in a letter shape. [0003] However, in the above-mentioned structure, especially when the combine body performs a revolving operation in a weak field, the traveling load applied to the crawler of the traveling unit becomes large. For example, the trunnion of the above-described hydraulic continuously variable transmission rotates in the neutral direction, and the main transmission lever returns from the initial set speed position to the neutral direction, causing a problem that the aircraft stops or decelerates. An object of the present invention is to improve the above-mentioned conventional problems. According to the present invention, in order to achieve the above object, the speed of the traveling body 1 is adjusted by operating the hydraulic continuously variable transmission 27 by operating the main transmission lever 11. In the combine, the main transmission lever 11 and the hydraulic continuously variable transmission 27 are linked by the worm gear 16 and the worm wheel 23, and the worm gear 16 is connected to the main transmission lever 11 and the worm wheel 23 is connected to the hydraulic continuously variable transmission 27. It is characterized by being connected to each other. [0005] Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an overall perspective view of a combine in which the apparatus of the present invention is implemented, and 1 is a traveling body of the combine, 2 like a normal combine.
Is a pre-processing unit provided at the front of the traveling body 1, 3 is a driving operation unit provided at the rear thereof, 4 is an engine unit provided at the lower part of the seat 5, and 6 is a rear unit. A grain tank for temporarily storing the grain, and a threshing section 7 for threshing the harvested and harvested grain stalk is provided on the opposite side to the operation section 3, the engine section 4 and the grain tank 6.
Is provided. In addition, a long auger 8 for discharging harvested grains outside the machine is provided above the traveling machine 1 from the rear to the front. A pair of running parts 9, 9 are provided. FIGS. 2 and 3 show the main parts of the present invention. FIG. 2 is a side view of the main transmission, and FIG. There are many levers and the like for performing various operations. A main shift lever 11 provided on a side portion of the seat 5 protrudes above a guide hole 13 provided in a shift panel 12, and FIG. In the range of the guide hole 13 in the lateral direction, the speed change operation can be performed by appropriately linearly operating in the direction of the arrow along each speed change position (not shown) specified on the surface of the speed change panel 12. .
The main transmission lever 11 is constantly pressed (in a state shown in FIG. 3) by an elastic body 14 attached to the back surface of the transmission panel 12, and is locked at an arbitrary transmission position. The lower portion of the main transmission lever 11 is formed integrally with a small flat plate 15 wider than the main transmission lever 11, and further includes a plurality of operation pieces 18 that rotate integrally with a rotation fulcrum shaft 17 of a worm gear 16 described later. Bolts 19, 19 are integrally connected. The worm gear 16 has a pivot shaft 17 that is rotatably mounted between the left and right machine frames 21 and 21.
Is mounted so as to rotate integrally therewith via a key 22. Below the worm gear 16, there is provided a worm wheel 23 in which the teeth 23a mesh with the teeth 16a of the worm gear 16 in a direction perpendicular thereto.
Similar to the shaft 17, it is fixed to a horizontal shaft 25, which is rotatably mounted between the machine walls 24, 24, mounted between the machine walls 21, via a key 26 so as to rotate integrally therewith. . Further, on one side surface of the worm wheel 23, rods 29 for connecting with a trunnion 28 for adjusting the degree of speed of a hydraulic continuously variable transmission (HST) 27 below are provided with respective pins 30. , 30 so as to be freely fitted. Accordingly, when the main transmission lever 11 is rotated in the direction of the arrow in FIG. 2, the worm gear 16 having a self-locking function is rotated via the rotation fulcrum shaft 17, and the worm wheel 23 meshing with the worm gear 16 is moved. The speed of the hydraulic continuously variable transmission 27 is changed as a result of rotating the trunnion 28 connected thereto by rotating by an amount. Next, the traveling clutch tension structure of the combine according to the present invention will be described with reference to FIGS.
FIG. 4 is a plan view of a main part, and FIG. 5 is a side view thereof. The base side of the L-shaped tension arm 32 is loosely fitted to a fulcrum shaft 34 erected on a plate 33 of the traveling body 1. A tension pulley 39 attached to an end of the tension arm 32 by a tension spring 38 via nuts 37, 37 is attached to an arm 36 provided at an intermediate portion of the tension arm 32 by a welding to a boss 35. ,
It is held so as to press the 40. [0010] The tension pulley 39 of the present invention comprises:
Instead of being integrally attached to the tip of the tension arm 32 as in the conventional device,
Connect the L-shaped fulcrum shaft 42 of the tension pulley 39 to the nut 43
The belts 40, 40
In the case where the belts 40, 40 run along the end of the tension pulley 39 due to the misalignment of the tension arm or the variation in the dimensions at the time of processing the tension arm 32, the nut 43 is loosened once as shown in FIG. After adjusting the angle, the nut 43 is tightened and attached again, so that the ear of the belt 40 is damaged or the arm 32 is damaged by deforming the tension arm 32 for correction as in the related art. Thus, the belts 40, 40 can always run at the center of the tension pulley 39 to withstand long-term use. The detailed structure of the traveling section 9 is shown in FIG.
A description will be given based on FIG. FIG. 6 is an overall side view, and FIG. 7 is an enlarged front sectional view of a main part. A track frame 47 is interposed between a drive wheel 45 and an idler wheel 46 at both front and rear ends in FIG. A plurality of wheels 48... Mounted on the track frame 47 and a single movable wheel 49 substantially at the center are provided, and a crawler 50 made of rubber or the like is wound around these to run. The unit 9 is constituted. And
Normally, to prevent the crawler 50 from coming off during circling,
A rod-shaped guide 5 that always keeps the inside of the crawler 50 stretched below the front and rear positions of the track frame 47, respectively.
The movable wheels 49 provided at approximately the center, which is near the center of gravity of the front and rear, are mounted with only the wheels 1, 51, and are loaded and unloaded when the combine traveling body 1 is transported by a truck or the like, and cross over the ridges when entering and exiting the field. In order to improve the balance of the traveling body 1 at times, the rod-shaped guide 51 is not attached.
A rod-shaped guide 51a is also attached to the movable wheel 49. That is, the roller 49a of the movable wheel 49
Are always held in a direction (downward in the drawing) in which the crawler 50 is stretched around a fulcrum shaft 53 which is a base end of the plate 52. As shown in FIG.
The reference numerals a and 49a are supported by a movable wheel axle 54 which extends horizontally in the left-right direction. The rod-shaped guide 51a has its rotating portion 56 inserted into the movable wheel shaft 54, and the traveling direction of the traveling machine body 1 is
It is mounted so as to be rotatable in the front-rear direction. Reference numerals 57, 57 denote left and right metal cores provided on the crawler 50. Therefore, the rod-shaped guide 51a is also provided at the center of the crawler 50, which has the largest bending, so that the crawler 50 can always follow the movable rolling wheel 49, and is not limited to the front-back direction. Even if one core metal 57 comes off the roller 49a of the movable rolling wheel 49 due to large unevenness in the direction, the other core metal 57 is held by the other roller 49a and the rod-shaped guide 51a, so that the crawler as a whole is 50 can be prevented from being detached from the track frame 47, and a smooth operation can be performed even in a field under bad conditions. Further, the details of the structure of the lubricating oil in the rotating portion of the roller 49a in FIG. 7 will be described. First, when lubricating this portion, the bolt 55 is first removed and the bolt hole 5 is removed.
After appropriately filling grease into 5a, the bolt 55 is tightened again. At this time, the grease is pushed into the inside by the pressing force of the bolt 55, but the grease intrudes into the bush 61 of the boss 60 from the holes 59, 59 formed in the movable wheel shaft 54 in advance, so that the bolt 55 is simply removed. Lubrication can be easily performed only by mounting, and grease nipples and the like are not required. Further, when the Glen tank 6 is inspected and maintained, it is necessary to move the Glen tank 6 to clear the surroundings.
A description will be given based on FIGS. FIG. 8 is a side view of an essential part of the portion of the Glen tank 6 from which the surface cover is removed, and FIG. 9 is an explanatory view of the operation of the Glen tank 6. A horizontal spiral (not shown) provided at the bottom of the Glen tank 6 for discharging grains. ) Is performed by transmitting the power from the engine unit 4 to the pulley 66 from the counter shaft pulley 64 via the belt 65 and rotating the horizontal spiral shaft 67 at the center thereof. A tension pulley 70 attached to the tip of a tension arm 69 that rotates about
When the stress of 1 is greater than the tension of the return spring 72, the clutch is operated to transmit the power, and when the stress is small, the clutch is disconnected and the power is cut off. In addition,
73 is a frame. When the conventional large Glen tank 6 is moved, the belt 65 is first loosened and removed from the pulley 66, and the Glen tank rotating arm 74 shown by a dotted line in FIG. Since the lever 75 is operated upward to float the whole of the Glen tank 6 in a state where the roller 76 on the tip end thereof is set on the frame 73, the structure as a whole becomes complicated and the cost is disadvantageous. Had become. Therefore, according to the present invention, the above-described conventional Glen tank rotation arm 74 is omitted, and a bent lever 77 is added to the base side of the tension arm 69, so that the tension pulley 70 on the distal end side can
As a substitute for 6, the operation is performed using the tension arm 69 originally mounted, so that the structure is simplified, the cost is reduced, and the same operation is performed. In the vehicle constructed as described above, the driver gets on the traveling body 1 of the combine and operates the engine unit 4.
Is started, and various drive units are activated to perform harvesting and harvesting of the culm in the field. At this time, the traveling speed of the traveling unit 9 is adjusted by the driver gripping the main transmission lever 11 and operating the transmission panel. 12, the worm gear 16 is rotated by the angle of rotation of the rotation fulcrum shaft 17 and meshes with the teeth 16a of the worm gear 16. The worm wheel 23 is rotated by the teeth 23 a of the worm wheel 23, and the hydraulic continuously variable transmission 2 is
7 is turned, and the hydraulic continuously variable transmission 2 is rotated.
7 is arbitrarily adjusted. Accordingly, the driver can change gears quickly with only a simple lever operation, and since the worm gear 16 and the worm wheel 23 having a self-locking function are interposed in the gear shift operation path, the driver can travel. Even when the traveling load applied to the crawlers of the traveling sections 9 and 9 becomes large, for example, at the time of the traveling operation in a field where the body 1 is soft, the main shift lever 11 is moved from the initially set speed position to the neutral Is prevented, and the gear shifting operation can be performed smoothly and reliably at all times. According to the present invention, there is provided a combine which adjusts the speed of the traveling body 1 by operating the hydraulic continuously variable transmission 27 by operating the main transmission lever 11. Since the continuously variable transmission 27 is linked by the worm gear 16 and the worm wheel 23, the worm gear 16 is connected to the main transmission lever 11 side, and the worm wheel 23 is connected to the hydraulic continuously variable transmission 27 side, so that the driver can easily operate the lever. Needless to say, the desired speed change operation can be quickly performed only by using the worm gear 16 and the worm wheel 23 in the speed change operation path.
Even when the traveling load applied to the crawlers of the traveling sections 9 and 9 becomes large during a revolving operation in a soft field or the like, a problem such as returning to the neutral direction is prevented, and the speed is always smoothly and reliably adjusted. Operation is possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of a combine embodying the apparatus of the present invention. FIG. 2 is a side view of the main transmission unit. FIG. 3 is a front view of the main transmission unit. FIG. 4 is a plan view of a main part of the traveling clutch tension according to the first embodiment; FIG. 5 is a side view of a main part of the traveling clutch tension according to the first embodiment; FIG. 6 is an overall side view of the traveling unit. FIG. 7 is an enlarged front sectional view of a main part of the traveling unit. FIG. 8 is a side view of an essential part of a Glen tank portion with a cover on the same surface removed. FIG. 9 is an explanatory diagram of an operation of the same Glen tank portion. [Description of Signs] 1 Traveling body 3 Drive operation unit 5 Seat seat 6 Glen tank 9 Travel unit 11 Main transmission lever 12 Transmission panel 16 Worm gear 17 Rotating fulcrum shaft 18 Operation piece 23 Worm wheel 25 Horizontal shaft 27 Hydraulic continuously variable transmission 28 Trunnion 29 Rod

   ────────────────────────────────────────────────── ─── Continuation of front page    F term (reference) 2B076 AA03 BA07 CC02 DA02 DA15                       DB08 DC01 DD06                 3D040 AA05 AA22 AB04 AC17 AC21                       AC24 AC28 AC30 AC42 AC50                       AC55 AC65 AD06 AE19 AF07                 3J067 AA01 AB01 AC42 BA04 DA43                       FA22 FB61 FB63 GA14                 3J070 AA03 BA08 BA13 CC43 DA24                       EA01

Claims (1)

Claims: 1. A combine which operates a hydraulic continuously variable transmission by operating a main transmission lever to adjust the speed of a traveling machine body, wherein the main transmission lever and the hydraulic continuously variable transmission are combined. A main transmission lever device for a combine, wherein the worm gear and the worm wheel are interlocked, and a worm gear is connected to the main transmission lever and a worm wheel is connected to the hydraulic continuously variable transmission.