JPH0129628Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a system for agricultural machinery, etc., which uses a single main operating lever to perform main gear shifting operations and so-called efficient gear shifting operations that speedily change gears without operating the main clutch. The present invention relates to transmissions of transmissions that can be obtained.

[Prior Art] As shown in FIG. 2, the main transmission is carried out by sliding a fork 20 holding a moving gear 9 on a fork shaft 21, and the sub-shifting is also carried out by sliding a fork 20 holding a moving gear 9 on a fork shaft 21. 22 by sliding them respectively on the fork shaft 23, which is interlocked by links 25 and 26 so that one main operating lever 24 can do this. The main operating lever 24 is inserted into a guide panel 28 in which a guide hole 27 is formed through which the main operating lever 24 can move.
As long as the main operating lever 24 moves along the guide hole 27, the main gear shift and the sub gear shift are selectively performed. The same applies to efficient gear shifting operations in which gear shifting can be performed without disengaging the main clutch.
A fork 29 holding the protruded gear 15 is slid on a fork shaft 30, and is connected by a link 31 to an auxiliary operating lever 32 installed at hand.

Therefore, in such a conventional structure, the main operating lever 24 is operated according to the guide panel 28, and the efficiency shift operation is performed at hand using a separate auxiliary operating lever 32, which has the disadvantage that it is easy to operate erroneously.

[Problems to be Solved by the Invention] The present invention was proposed in an attempt to prevent such erroneous operations in the conventional structure and to obtain a transmission device that is easy to operate.

[Means for Solving the Problems] Therefore, this invention includes a main shift fork 20 that slides on a fork shaft 21 while holding a main shift moving gear 9 to obtain a main shift, and a gear 15 with a protrusion. Efficiency shifting fork that slides on a fork shaft 30 while holding the fork and engages and disengages with either of the gears 16 and 17 with protrusions loosely fitted on the left and right sides of the gear 15 with protrusions, thereby achieving a speed change. 29, and a transmission fork 22 for the auxiliary transmission which slides on the fork shaft 23 and obtains the auxiliary transmission while holding the moving gear 10 for the auxiliary transmission. The fork 29 for auxiliary transmission is connected to the main operating lever 24 via links 33 and 34, the fork 22 for auxiliary transmission is connected to the auxiliary operating lever 32 by a link 35, and the auxiliary operating lever 32 is placed near the main operating lever 24. The above-mentioned problem has been solved by guiding and collecting them in the same guide panel 28.

[Function] By adopting this method, the main shift and efficiency shift that are frequently used can be combined into one main operating lever 2.
This can be accomplished through the series of operations described in step 4, resulting in a transmission system for transmissions that is easy to operate and is free from erroneous operations.

[Example] Hereinafter, an example of this invention will be described with reference to the drawings. Fig. 1 is a sectional view of a transmission such as a power tiller. 2, 3, 4, 5, 6, and 7, and is finally transmitted to the left and right axles 8, 8, which serve as output shafts, during which time various speed changes and power interruption are performed. Among these, the main transmission is performed between the input shaft 1 and the intermediate shafts 2 and 3, the secondary transmission is performed between the intermediate shafts 3 and 4, and the intermediate shaft 5 is used for efficiency transmission.

In other words, each intermediate shaft 2, 4 for both the main transmission and the auxiliary transmission
The movable gears 9 and 10 are slidably and securely fitted to the input shaft 1, and the movable gears 9 and 10 are connected to the input shaft 1 via a gear 12 that is loosely fitted to the input shaft 1. Mating gear 1 attached to shaft 3
1, 13, and a gear 14 pivotally attached to the intermediate shaft 4
This is done by changing the mesh.

On the other hand, efficient shifting is achieved by firmly fitting the protruded gear 15 to the intermediate shaft 5 so as to be able to slide freely, and engaging and disengaging the protruded gears 16 and 17 which are also loosely fitted to the intermediate shaft 5. Therefore, when a main transmission or a sub-transmission performs a gear shifting operation, the clutch on the upstream side must be disengaged to change the mesh, whereas this efficiency transmission engages and disengages a protrusion. Because it is a mechanical gear, it is unique in that it allows you to change gears even while it is rotating without disengaging the clutch. In addition, a brake mechanism 18 is provided on the intermediate shaft 5, and so-called side clutch mechanisms 19, 19 are provided on the intermediate shaft 6. The sliding of the movable gears 9, 1 and the protruded gear 15 is performed by a so-called fork lever method.

FIG. 3 is a perspective view of these operating systems showing an embodiment of this invention. The main operating lever 24 performs the main gear shifting operation and the efficiency shifting operation, and the auxiliary operating lever 32 operates the auxiliary gear shifting. do. Therefore,
The fork 20 for main shift and the fork 29 for efficiency shift are connected to the main operation lever 24 by links 33 and 34 in order to interlock them, and the fork 22 for sub-shift is connected to the sub-operation lever 32 by link 3.
Connect with 5. Note that the sub-operation lever 32 is guided close to the main operation lever 24, and the same guide panel 28
Collect them.

As a result, the main operating lever 24 can be moved to the left or right while the auxiliary operating lever 32 remains in the same position, and the main operating lever 24 can be moved to select an appropriate main shift position.
Efficient shifting can be achieved only by vertical movement.

In other words, the main control lever 24, which is frequently used, can be operated simply by moving it laterally in the guide hole 27 to perform a gear change accompanied by a clutch disengagement operation. Conventionally, the main operating lever 24 had to be moved completely through the horizontal H-shaped guide hole 27, as shown in FIG. An appropriate main speed change can be obtained by simply changing the main speed, and an efficient speed change can be obtained by performing a longitudinal movement operation that follows the main speed change operation. (The clutch can remain connected when performing efficiency shifting.) [Effects of the invention] This invention is structured and operates as described above, so it is suitable for main shifting and efficiency, which are frequently used. Shifting can be done by a series of operations of one main operating lever 24, which eliminates the possibility of erroneous operation compared to the conventional method of using separate levers. Since they are gathered on the guide panel 28, operation becomes easier in this respect as well.

Furthermore, the main operating lever 24 and the auxiliary operating lever 32
By concentrating on the same panel, members can be omitted, which is advantageous in terms of space and cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the transmission, FIG. 2 is a perspective view of a conventional operating system, and FIG. 3 is a perspective view of the operating system of this invention. Code, 9, 10...Moving gear, 11, 12, 1
3...Mating gear, 15...Gear with protrusion, 16,
17... Gear with mating protrusion, 24... Main operation lever, 32... Sub-operation lever, 28... Guide panel.

Claims (1)

[Claims for Utility Model Registration] A fork 20 for main transmission that slides on a fork shaft 21 while holding a moving gear 9 for main transmission to obtain a main speed change, and a fork shaft while holding a gear with a protrusion 15. The gear 1 with protrusions slides on the gear 30 and is loosely fitted on both the left and right sides of the gear 15 with protrusions.
Efficiency shifting fork 29 that changes gears by engaging and disengaging with either of 6 or 17 while rotating.
In the transmission of Mitshon, the fork 22 for the auxiliary transmission slides on the fork shaft 23 while holding the moving gear 10 for the auxiliary transmission to obtain the auxiliary transmission. Link fork 29 of 33, 34
The fork 22 for auxiliary transmission is connected to the main operating lever 24 via the auxiliary operating lever 32.
Mitssion's transmission is characterized by a 5-way connection. The transmission of a transmission according to claim 1, which is a registered utility model, characterized in that the auxiliary operating lever 32 is guided close to the main operating lever 24 and is assembled in the same guide panel 28.