JPH11236970A - Shift detent structure of travel transmission device for mobile agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a device from being enlarged even when the displacement quantity of a shift fork is minimized into many stages by providing two detent sections on the shift fork. SOLUTION: A pitch is set so that one of two detent balls 31, 31 provided on a shift fork 17 is released from the low-speed detent groove (c) of a shift fork shaft 29 when the other is coupled with the detent groove (c). A slide gear 18 bridges a small drive gear 23 and the spline of an input sleeve 19 to drive a low-speed train. When one of the balls 31, 31 is coupled with a detent groove (d), the other is released from the detent groove (d), and the slider gear 18 bridges a large drive gear 22 and the spline of the input sleeve 19 to drive a high-speed train. When one of the balls 31, 31 is located between the detent grooves (c), (d), the other is coupled with a neutral detent groove (e), and the slide gear 18 is released from all splines into a neutral state. The displacement quantity of the shift fork 17 at the time of shift actions can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed change detent structure for a traveling transmission of a mobile agricultural machine.

[0002]

2. Description of the Related Art Conventionally, when a plurality of speed stages and a neutral position are provided in a traveling transmission in a mobile agricultural machine, a detent groove is appropriately formed on a shift fork shaft corresponding to each of a high speed, a neutral position and a low speed position. It is common to provide at a pitch. For that reason,
The displacement length of the speed change hook is required to travel from high speed to neutral and then to low speed and vice versa, resulting in a long cumulative length. As a result, the width and overall volume of the traveling transmission device are increased, and the overall body becomes large. There is a potential defect.

[0003] In addition, the space between the detent grooves of the transmission fork shaft becomes a detent non-operating portion during the speed changing operation, which causes a time lag at the time of shifting, which is a factor that hinders a smooth shifting operation.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the conventional structure.
At the time of speed change operation, the displacement amount of the shift fork is made as small as possible so that the traveling transmission device does not become large even if it is multi-staged, and at the same time, the time lag at the time of shift operation is reduced and smooth shift operation is possible. The purpose is to obtain a traveling transmission device for a mobile agricultural machine.

[0005]

SUMMARY OF THE INVENTION In a mobile agricultural machine having a detent portion provided in a shift hook of a traveling transmission, the shift hoke may be at any of high speed, neutral, and low speed positions within a displacement range of the speed change hook. When one of the detent portions is fitted in the detent groove formed in the transmission fork shaft, that is, when the detent is in operation, the other detent portion is positioned so as to be out of the groove, that is, in the non-operation position. Position, 2 on the shifting fork
Since the detent portions are provided, even if one detent portion is located between the grooves, the other detent portion is fitted in the detent groove to perform a detent action.

In a mobile agricultural machine in which a detent portion is provided in a speed change fork of a traveling transmission, two detent portions are provided in the speed change fork, and a detent groove of the speed change fork shaft is moved to a high speed position and a low speed position. When one detent part is located between the high-speed position and the low-speed position, that is, when it is in the non-operation position, the groove at the relative position becomes the operation position of the other detent part. That is, the groove is a neutral detent groove.

[0007] In a mobile agricultural machine in which a detent portion is provided in a speed change fork of a traveling transmission, two detent portions are provided in the speed change fork, and the two detent portions are moved in the direction of the speed change fork axis. In parallel, when one detent part is deviated from the detent groove on one detent axis, a relative position is formed in which the other detent is fitted into the groove.

[0008] In a mobile agricultural machine in which a detent portion is provided in a transmission fork of a traveling transmission, an integral transmission fork has two detents.
And two detent portions are arranged in parallel, and further correspond to the detent grooves of two transmission fork shafts inserted into two holes laterally drilled in the transmission fork. In this manner, the two detent portions are configured so as to have a relationship of a detent operation position, that is, a position fitted to the groove, or a non-operation position, that is, a position deviating from the groove.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is based on the selection of a working speed corresponding to a crop, such as a root crop harvester or a grain harvester.
The present invention has been devised so as not to increase the overall size of the vehicle body by minimizing an increase in the number of gears and an increase in the size of the traveling transmission.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 is an overall side view of a root vegetable harvesting machine as an embodiment according to the present invention, and a root vegetable harvesting machine equipped with a traveling transmission device according to the present invention. It is. FIG. 2 is an explanatory view of a traveling transmission system in section of a traveling transmission device relating to a main part of the present invention, and FIGS. 3 to 5 are sectional views illustrating shift positions of a subtransmission train as an embodiment.

First, the entire configuration of a root vegetable harvesting machine as an embodiment will be described with reference to FIG. 1. A control section (A) is provided on the right side of a machine (1) provided with a crawler traveling device (5). And an engine (3) is disposed below the control section (A). A traveling transmission (10) at the rear of the machine frame (1)
And drives the continuously connected crawler traveling device (5). On the left side of the machine stand (1), a vibrating blade (8) that penetrates into the soil and lifts the root of the root vegetable, and a foliage of the root vegetable rising by the vibrating blade (8) is sandwiched and pulled upward diagonally rearward. The vertical transport body (2) extends to the rear of the fuselage through the side of the control section (A), and is obliquely provided with a gentle slope of front low and rear high in a side view.

The vertical transport body (2) is provided with a pair of left and right elastic transport endless belts facing each other, sandwiches the roots of the root vegetables raised by the vibrating blade (8), and lifts the root vegetables obliquely upward and rearward. The tilt angle can be adjusted by using the rotation fulcrum (6) as a fulcrum, and the work operation adapted to the growing state of the root vegetables is configured to be possible, and the work is pulled out by the vertical carrier (2). The root vegetables are conveyed to the rear of the machine and discharged.

The vibrating blade (8) is connected to the upper link (1).
The upper link (12) attached to the front end of the parallel link consisting of 2) and the lower link (13), the penetration depth into the soil is adjusted by a hydraulic cylinder (15), and the upper link (12) is directly connected to the cam pulley (4). ) Gives vibration.

Further, in front of the starting end of the vertical transport body (2), a pair of horizontally-rotating raising tines (7b) (7b) are provided.
And a pre-processing device (7) composed of a vertically rotating pulling tine (7a) (7a), and the pre-processing device (7) is integrally mounted on the vertical transport body (2), It is configured to be able to turn up and down with the fulcrum (6) as a fulcrum.

On the other hand, below the end of the vertical transport body (2), a starting end of a rear transport body (9) is arranged, and the rear transport body (9) is transported by the vertical transport body (2). The root vegetables in the suspended state are inherited, and the root vegetables are transferred backward and stored in the storage container (16). As described above, the leaves of the root vegetables harvested are prepared by the pretreatment device (7), the soil is softened by the vibrating blade (8), and the soil is softened by the vertical transport body (2) as the machine advances, and the diagonally rearward upper side is pulled up. And transferred to the post-transporter (9), and transferred to the storage container (1) via the post-transporter (9).
6) A root vegetable harvesting machine that stores as harvested products.

FIG. 2 shows a side view of the traveling power transmission system according to the main part of the present invention. FIGS. 3 (3) to 5 show the selection of a speed stage by a slide gear (18) via a speed change hook (17). It is explanatory drawing which illustrated the state. The configuration will be described with reference to the drawings. The input sleeve (19) is composed of a left case (20) and a right case (20).
A large drive gear (22) and a small drive gear (23) are slidably pivoted on the outer periphery of the input sleeve (19) via a ball bearing. A slide gear (18) meshes with and engages with an outer spline formed on a part of the outer periphery.

On the other hand, the intermediate shaft (24) has a large intermediate gear (25) and a small intermediate gear (26) meshed with splines.
Are meshed with each other, and the large drive gear (22) and the small intermediate gear (2)
6) mesh with each other to form a high-speed train in the subtransmission, and similarly, the small drive gear (23) and the large intermediate gear (25) mesh to form a low-speed train. Further, a double sprocket (27) having the same diameter and the same number of teeth meshing with a spline is meshed with the intermediate shaft (24), and a driven sprocket meshed with the double sprocket (27) and the main transmission shaft is provided. And two transmission chains (28).

A description will now be given of how to reduce the size of the traveling transmission device (10) while providing a neutral position in a narrow range by way of an example of a sub-transmission for the main part of the present invention. 17) is provided with two detent portions. More specifically, two independent holes are drilled in the transmission fork (17) in the vertical direction toward the hole for inserting the transmission fork shaft (29). And a coil spring (30) in each hole
(30) and detent balls (31) and (31).

On the other hand, the speed change fork shaft (29) is inserted into a hole formed in the speed change fork (17), and is bridged between the left case (20) and the right case (21). I have. The speed change fork shaft (29) usually has a predetermined detent groove, but the space between the grooves is a non-operating position where no detent operation is performed. Therefore, according to the present invention, one detent groove is further added at a position corresponding to the two detent portions, and a neutral position is further provided between the high-speed position and the low-speed position which are provided by effectively utilizing the space between the grooves. It is. That is, when one detent ball (31) is located between the high-speed detent groove (d) and the low-speed detent groove (c), the other detent ball (31) is newly added to the neutral detent groove (e). ) To perform a detent function, so that a neutral position can be further provided between the high-speed position and the low-speed position that are located close to each other.

Then, the speed change fork shaft (29) is inserted into the speed change fork (17), and the operation status with the gear train constituting each speed stage in the sub speed change will be described with reference to FIGS. explain.
FIG. 3 shows a low-speed detent groove in which one of the two detent balls (31) and (31) provided on the speed-change fork (17) is a low-speed detent groove of the speed-change fork shaft (29). The pitch is set so that the other one is deviated from the detent groove when fitted with (c). At this time, the slide gear (18) bridges the small drive gear (23) and the spline of the input sleeve (19) to drive the low-speed train.

FIG. 4 shows a state at a high speed, and two detent balls (3) provided on the speed change hook (17) in the same manner as described above.
1) When one of the (31) is fitted with the high-speed detent groove (d), the other one sets the mutual pitch so as to be out of the detent groove. At that time, the slide gear (18) has the large drive gear (22). ) And the spline of the input sleeve (19) to drive the high-speed train.

FIG. 5 shows a neutral state, in which two detent balls (31) and (3) provided on the speed change fork (17).
If one of 1) is located between the low-speed detent groove (c) and the high-speed detent groove (d), the other is fitted with the neutral detent groove (e), and at that time, the slide gear (18) is The spline is disengaged from both the spline of the large drive gear (22) and the small drive gear (23), and the driving force is cut off at both the high speed and the low speed to be in the neutral state. With such a configuration, a neutral time is provided between the low speed and the high speed, and a neutral detent groove (e) is provided at another position without providing a detent groove at this position, so that a shift fork ( 17) The displacement amount is reduced.

That is, by providing two detent balls (31) and (31) on the speed change hook (17), when one of the detent balls is fitted into the detent groove as described above, the other one is moved from the detent groove. Since it is a deviated correlation position, even if the detent groove is not provided at the neutral position provided during the low speed, the other one can be fitted into the detent groove at the neutral position separately provided,
With this configuration, low-speed, neutral, and high-speed shifting
Despite having a neutral position, there is no need to lengthen it.

An alternative embodiment will be described below with reference to FIGS. 2 parallel to the direction of the speed change fork shaft (29)
Two holes are laterally drilled in parallel with the double transmission fork (32) provided with two detent portions, and left and right cases (20) (2) are formed in the holes.
1) Two variable speed fork shafts (29) (2) bridged between
9) is inserted so as to form an integral structure, and at the time of gear shifting, the double speed changing fork (32) is displaced across the two speed changing fork shafts (29) (29).

In FIG. 7, two transmission fork shafts (2
9) By the cooperation of (29) and the dual speed fork (32),
One detent ball (31) is connected to one detent axis (2).
At the position where the detent groove is fitted in the detent groove of 9), another detent ball (31) is located at the edge of the adjacent groove at the limit between the grooves of the other transmission fork shaft (29). The relative position is configured so that the center of (31) is located, and as shown by an imaginary line, an example in which the detent ball (31) is displaced in the direction of arrow (a) by the speed change operation, as shown in the phantom line, -The center of the rule (31) is located at the edge of the groove,
The center of the other detent ball (31) is an arrow (b)
And is located at the center of the groove on the other transmission fork shaft (29), so that one detent ball (3)
As soon as 1) comes off the groove, another detent ball (31) fits into the detent groove and is detented. That is, when the gearshift operation is performed, there is no time lag in switching between the speed stages, and the speed can be changed smoothly.

[0026]

The present invention is embodied in the form described above, and has the following effects.

[0027] In a mobile agricultural machine having a detent portion provided in a speed change hook of a traveling transmission, any one of high speed, neutral, and low speed shift positions within a displacement range of the speed change hoke may be employed. When the portion is fitted into the detent groove formed in the transmission fork shaft, that is, when the detent is in operation, the other detent portion is at a position deviating from the groove, that is, in a non-operation position, and the transmission hood is in a relative position. Since two detent parts are provided on the groove, even if one detent part is located between the grooves, the other detent part fits into the detent groove to perform a detent action, and the space between the grooves, that is, Since the neutral position can be set by the effective use of the working position, it is possible to prevent the traveling transmission from being enlarged due to the multi-stage, and to achieve a compact traveling transmission.

[0028] In a mobile agricultural machine having a detent portion provided in the speed change hook of the traveling transmission, the speed change hoke is provided with two detent portions, and the detent grooves of the speed change hoke shaft are moved to the high speed position and the low speed position. When one detent part is located between the high-speed position and the low-speed position, that is, when it is in the non-operation position, the groove at the relative position becomes the operation position of the other detent part. By setting the groove as a neutral detent groove, when one of the two detent parts provided on the speed change fork is located between the high-speed and low-speed grooves which are located close to each other, the other detent part becomes Since it fits in the groove at the neutral position, the two detent parts can be alternately detented by the separately provided detent groove, and the amount of displacement of the speed change hook can be reduced. The transmission could be made smaller.

[0029] In the mobile transmission of a traveling machine having a detent portion provided in the speed change fork, two detent portions are provided in the speed change hoke, and the two detent portions are moved in the direction of the speed change hoke axis. When one detent part on the one detent shaft comes out of the detent groove on the one detent axis, the other detent is configured to form a relative position to be fitted in the groove, so that one of the detent grooves fits with the groove in the high-speed position and the groove in the low-speed position. When it is located between the grooves of the position, the other is fitted to the groove engraved on the speed change fork shaft, so that the space between the grooves, that is, the detent non-working position can be effectively used as the working position, Since the operation stroke can be shortened even in a multi-stage traveling transmission device, the traveling transmission device can be made smaller, and the operability can be made easier.

In a mobile agricultural machine in which a detent portion is provided in a transmission fork of a traveling transmission, two
And two detent portions are arranged in parallel, and further correspond to the detent grooves of two transmission fork shafts inserted into two holes laterally drilled in the transmission fork. In this manner, the two detent portions are alternately arranged in the relation of the detent operation position, that is, the position fitted to the groove, or the non-operation position, that is, the position deviated from the groove. At the same time as the release, the other detent portion operates, so that the time lag at the time of shifting can be eliminated and the speed can be changed smoothly.

[Brief description of the drawings]

FIG. 1 is an overall side view of a root vegetable harvester according to an embodiment of the present invention.

FIG. 2 is a transmission sectional view of a traveling device according to a main part of the present invention.

FIG. 3 is a cross-sectional view at a low speed of a traveling transmission according to a main part of the present invention.

FIG. 4 is a cross-sectional view at a high speed of a traveling transmission according to a main part of the present invention.

FIG. 5 is a cross-sectional view of a traveling transmission device according to a main part of the present invention when the traveling transmission device is in a neutral position.

FIG. 6 is a sectional view of a main part of the present invention, which is constituted by two speed change fork shafts.

FIG. 7 is an operation explanatory view of a main part constituted by two speed change fork shafts in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Root crop harvester A Control part 5 Crawler traveling device 7 Pre-processing device 10 Traveling transmission device 17 Speed change hook 18 Slide gear 19 Input sleeve 22 Large driving gear 23 Small driving gear 25 Large intermediate gear 26 Small intermediate gear 27 double sprocket 29 variable speed fork shaft 31 detent ball 32 double speed fork

Claims (5)

[Claims] 1. A mobile agricultural machine in which a detent portion is provided in a speed change hook of a traveling transmission, wherein a high speed, a neutral speed and a low speed speed change position within a displacement range of the speed change hoke are provided.
When one of the detent parts is fitted in the detent groove formed in the transmission fork shaft, the other detent part is in a relative position so as to be disengaged from the groove, and two detent parts are provided on the transmission fork. A shift detent structure of a traveling transmission device in a mobile agricultural machine, characterized in that a detent structure is provided. 2. A mobile agricultural machine in which a detent portion is provided in a speed change fork of a traveling transmission, wherein a detent groove of a speed change fork shaft is located near a high speed position and a low speed position, and another detent groove is adjacent to the detent groove. 2. The detent structure according to claim 1, wherein said groove is set at a neutral position. 3. A mobile agricultural machine in which a detent portion is provided on a speed change fork of a traveling transmission, wherein the speed change fork is provided with two detent portions, and the two detent portions are provided on a speed change fork shaft. 2. The speed changing detent structure of a traveling transmission device in a mobile agricultural machine according to claim 1, wherein the speed changing detent structure is arranged in series in the direction. 4. A mobile agricultural machine in which a detent portion is provided on a speed change fork of a traveling transmission, wherein two detent portions are provided on an integral speed change fork, and the two detent portions are arranged in parallel. And a transmission for a traveling power transmission in a mobile agricultural machine, the transmission being adapted to correspond to the detent grooves of two transmission fork shafts inserted into two holes laterally drilled in the transmission fork. Detent structure. 5. A mobile agricultural machine in which a detent portion is provided on a speed change fork of a traveling transmission, wherein two detent portions are provided on an integrated speed change fork, and the two detent portions are alternately detented. 5. The variable speed detent structure of a traveling transmission device in a mobile agricultural machine according to claim 4, wherein the relationship is such that the relationship is a working position, that is, a position fitted into the groove, or a non-working position, that is, a position out of the groove.