JPH0122731Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speed change operation device for a work traveling vehicle such as an agricultural tractor.

Generally, in this type of work traveling machine, a gear shift lever is attached to the fender section on either the left or right side of the driver's seat in consideration of operability, and the gear shift lever and the transmission mechanism on the transmission side are connected via a connecting member. There are things that are linked together. By the way, in this kind of equipment, it is sometimes required to change the left and right gear shift levers because the direction of getting on and off the machine differs depending on the operator. As shown in Figure 2, the gear shift lever and the gear shift mechanism were connected by a connecting member that penetrated the side of the lever guide case attached to the fender. A lever guide case provided with a hole must be prepared separately, which causes problems such as an increase in the number of parts to be prepared and complicated parts management, leading to increased costs.

In view of the above-mentioned circumstances, the present invention was created with the aim of providing a speed change operation device for a work traveling machine that can eliminate these drawbacks. The lever guide case of the fender is assembled into a lever guide case having an opening on the fender fixing surface side to form a speed change operation unit, and when the speed change operation unit is selectively assembled to either the left or right fender of the traveling aircraft. An opening is formed in the fixed corresponding part so as to face the opening on the lever guide case side, and the inside of the lever guide case and the fender are communicated through both openings, and the base end of the gear shift lever mechanism and the transmission are connected. The present invention is characterized in that a connecting member for interlockingly connecting the transmission mechanism on the side of the transmission case is disposed so as to pass from inside the lever guide case through both of the openings and through the inside of the fender.

With this configuration, the present invention allows a single type of speed change operation device to be selectively assembled to any left or right fender.

Next, the present invention will be explained in more detail based on the embodiments shown in the drawings. In the drawing, 1 is a running body of an agricultural tractor, 2 is a bonnet that covers the engine mounted on the running body 1, 3 is a front wheel, 4 is a rear wheel, and 5 is a transmission incorporating a transmission mechanism 6 that is interlocked with the engine side. Case, 7 is the driver's seat,
Reference numeral 8 indicates a driving handle, and reference numeral 9 indicates an elevating link mechanism, both of which are arranged in the conventional manner.

The transmission mechanism 6 changes and outputs the driving force from the engine side by changing the speed by operating a speed change lever, which will be described later. Shifter hooks 11 and 12 are engaged, and shifter rails 13 and 12 slide in response to the operation of a gear change lever, which will be described later.
are fixed respectively. Further, reference numeral 15 denotes a lid body fixed via a tightening bolt 15a to close the upper side of the transmission case 5, and the lid body 15 is attached to the front side of the fuselage when viewed from the side as shown in FIG. It has a high convex shape and a low concave shape at the rear. The shifter rails 13 and 14 pass through the lid body 15 so that one end side, which is the mounting side of the shifter oaks 11 and 12, runs along the inner lower surface of the convex part, and the other end, which is the inner wire mounting side described later, runs along the outer upper surface of the recessed part. are doing. shifter rail 1
One end portions of inner wires 16 and 17 are screwed and fixed to the protruding ends of wires 3 and 14, respectively. Further, one end portions of the outer wires 16a, 17a are fixed to a rising edge 15a provided upright on the edge of the recessed portion of the lid body 15 as an outer receiver. A pair of control wires consisting of inner wires 16, 17 and outer wires 16a, 17a attached to the transmission case 5 side in this way sandwich the ultra-low speed switching lever 19 protruding from the top surface of the sub-transmission case 18 on the left and right sides. It is extended towards the rear in such a way that it looks like this. Reference numeral 20 denotes an upper surface cover bolted to cover the recessed portion of the lid body 15, and the upper surface cover 2
A vibration isolating material 21 made of a rubber elastic material is interposed between the cover 15 and the cover 15 .

Reference numeral 22 denotes a fender that covers the left and right rear wheels 4, and an opening 22a is provided at the upper front side of the fender 22.
An integral unit member such as the gear shift lever 23 is attached to the gear shift lever 23. That is, the unitized member such as the gear change lever 23 closes the opening 22a, and the tightening tool 24 is held such that a part of the unit enters into the fender 22 from the opening 22a.
fender 22 by screwing through a.
The lever guide 2 is removably fixed to the side, but the back side (fender fixing surface) is open.
A support shaft 25 is rotatably supported between the left and right side plates of 4. A support body 24b straddles the boss tube 24a that is rotatably inserted into the center of the support shaft 25. By being rotatably supported by
and in the left-right direction (arrow C
-D direction) and can be freely oscillated in response to a speed change operation, which will be described later. Furthermore, spindle 2
Boss portions 26a, 27a of actuating arms 26, 27 are rotatably inserted through the actuating arms 26, 27 at both left and right sides of the boss cylinder 24a, and the actuating arms 26, 2
The other ends of the inner wires 16 and 17 are respectively fixed to locking pins 26b and 27b protruding from the inner wires 7. When the gear shift lever 23 is operated to position A toward the outside of the aircraft body (in the direction of arrow C) along the gear shift groove 28 provided on the upper surface of the lever guide 24, the engagement pin 23c protruding from the gear shift lever 23 is moved. The engagement pin 23c engages with a locking groove 26c formed on the upper edge of the outer actuating arm 26, and when the outer actuating arm 26 is operated to the position B toward the inside of the body (in the direction of arrow D), the engaging pin 23c engages with the locking groove 26c formed on the upper edge of the outer actuating arm 26.
It engages with the locking groove 27c on the 7 side, and in this state, the shift lever 23 can be operated in the longitudinal direction to any desired shift position. In addition, 23d is a torsion mechanism that biases the speed change lever 23 toward the neutral stop position N, and 22d is a closing plate for the opening 22a on the side where the speed change lever 23 is not attached.

The set of control wires passes through a wire guide 29 fixed to the fender 22 via brackets 29a and 29b and connects to the fender 22.
It extends to the top of the inner wall. The other ends of the outer wires 16a and 17a are attached to a retaining plate 31 that is integrally provided with a reinforcing member 31 for the fender 22.
A is used as an outer holder and is adjustable and fixed via a nut 31b, but in this embodiment, the retaining plate 31a
As shown in FIG.
It is now located between 2 and 2. 32 is a direction indicator attached to the fender 22, and the direction indicator 32 is rotatable via a support shaft 32a to open and close an adjustment window 22b provided approximately at the position of the retaining plate 31a of the fender 22. It is composed of Magnets 32b and 22c are fixed to the bottom plate of the direction indicator 32 and the fender 22, respectively, so that the direction indicator 32 can be rotated downward and the adjustment window 22b can be held in a closed state. Further, when the direction indicator 32 is rotated to open the adjustment window 22b, the outer receiving portion can be seen through the adjustment window 22b, and the outer receiving portion can be freely adjusted.

In the embodiment of the present invention configured as described above, the user sitting in the driver's seat can change the driving speed by operating the speed change lever 23 which is interlocked and connected to the speed change mechanism 6 housed inside the transmission case 5. Although it can be operated, the shift lever 23 is a single piece that can be freely attached to either the left or right fender 22 without preparing separate members for the left and right sides. That is, the shift lever 23 is integrated into a unit with a lever guide 24 and a support shaft 25, and the lever guide 24 is connected to the fender 2 via a tightening tool 24a.
It can be easily installed and fixed on either the left or right side by simply tightening it. Moreover, the opening 22 of the fender 22 on the other side to which the gear shift lever 23 is not attached
Since the opening 22a is easily closed through the closing plate 22d, the opening 22a is temporarily closed in both fenders 22.
There is no problem even if it is established. In this way, the gear shift lever 23 of the present invention can be freely attached to any side of the fender 22 that the user desires, but it is only necessary to prepare a set of units, This makes it possible to effectively reduce the number of parts, simplify parts management, and reliably reduce costs. Moreover, since the unitized gear shift lever 23 mechanism is assembled so that a part of it enters into the fender 22, the amount of forward protrusion of the lever guide 24 can be suppressed to a small amount, which obstructs the operator from getting on and off the machine. This can be prevented as much as possible.
Note that in order to close the opening 22a, instead of using a simple closing plate 22d as described above, for example, a method shown in FIG.
As shown in the figure, it may be a control box 33 or a tool box that has a horizontal control mechanism inside. There is no need to secure it separately, and it can be made to have excellent livability and operability.

In addition, the control wire is the outer wire 1
Since the wires 6a and 17a are inserted between the fender 22 and the reinforcing member 31, the outer wires 16a and 17a and the inner wires 16 and 17 at these portions do not need to be covered with particularly large members. Furthermore, the structure is such that the rear wheel 4 is protected by the reinforcing member 31 without using a separate member, and therefore these wires can be effectively protected from mud etc. carried around by the rear wheel 4. Furthermore, even if a larger rear wheel 4 is used instead of the standard one, or an attachment is attached to the rear wheel 4, there will be no problem. Moreover, when inspecting and adjusting the control wire at the outer receiver, the direction indicator 32 can be rotated upward to open the adjustment window 22b of the fender 22, and the outer receiver can be seen through the adjustment window 22b. and can make any necessary adjustments. In this way, the outer receiving part for adjusting the control wire is located between the reinforcing member 31 and the fender 22, and inspection and maintenance can be performed easily and easily through the adjustment window 22b. The lid doubles as the direction indicator 32, which is extremely convenient.

Furthermore, the unitized gear shift lever 23 and other members used in this embodiment are different from the lever guide 24.
Since other members are integrally assembled with the lever guide 24 and the lever guide 24 functions as a cover body, for example, although the bracket 34 and the lever guide 35 shown in FIG. 16 are provided separately, As such, there is no need to attach each part to the fender 22 separately, which not only improves workability during installation and inspection and maintenance, but also improves strength.The number of parts can also be reduced, resulting in a simple structure. be able to.

In addition, in the present invention, the gear shift lever 23 is
Since it is integrated into the lever guide 24 with other parts, it is easy to simply connect the left and right fenders 2.
In addition to being selectively attached to either one of the fenders 2, if the user desires, the fender 22 may be provided with a gear shift lever 39 on the working machine side as shown in FIG. When the lever 23 cannot be attached, it can be attached to any other location, for example, it can be attached to the transmission case 5 side as in the conventional case. In this case, the gear shift lever that is attached to the fender 22 may be used as is, but if it is attached to the transmission case 5, both shift levers 23 and shifter rails 13 and 14 may be close to each other. It is necessary to connect them via control wires, which has disadvantages such as the control wires being wasteful and the structure becoming complicated and increasing costs. This includes the 13th, 14th, 15th
As shown in the figure, a dedicated gear shift lever 34 may be attached to the transmission case 5. That is, in this case, the bracket 35 fixed to the transmission case 5 has the same structure as in the above-mentioned embodiment.
Support shaft 25, operating arms 36, 37, gear shift lever 3
4 etc. are assembled into a unit, and the actuating pins 36a, 37a protruding from the lower ends of the actuating arms 36, 37 are connected to pieces 13b, 14b screwed to the protruding ends of the shifter rails 13, 14. By engaging with the provided engagement grooves 13a and 14a, the shifter rail 13,
If the shifter rails 14 are allowed to slide, the shifter rails 13, 14 and the speed change lever 34 will be directly connected, which is convenient. Moreover, this can be installed before assembling the gear shift lever 23 to the fender 22 as in the previous embodiment.
For example, in the aircraft assembly stage at the factory, if the gear shift lever 34 is installed at the stage where the transmission case 5 is assembled before the gear shift lever 23 is attached to the fender 22, the gear change operation of the transmission mechanism 6 can be confirmed quickly. It has the advantage of being able to
As shown in FIG. 18, as a configuration for checking the operation of the transmission mechanism 6 before attaching the transmission lever 23 to the fender 22, the outer wire 16a,
A holding plate serving as an outer receiver for the gear 17a may be provided on the speed change lever 23 side instead of on the fender 22 side. That is, in this case, both legs of the holding plate 38, which is approximately shaped in plan view, are integrally fixed to the inner wall surface of the bracket 24, so that the holding plate 38
The shift lever 23 and the like are integrated into a unit, so even before the shift lever 23 is attached to the fender 22, the shifter rails 13, 14 and the shift lever 23 side are interlocked and connected via control wires. If you do so, you can confirm the speed change operation of the speed change mechanism 6. Furthermore, since this device is a unit in which even the retaining plate 38 is integrated, the retaining plate 31a is attached to the reinforcing member 31 side as in the above-mentioned embodiment, so that the retaining plate can be adjusted depending on the mounting position of the gear shift lever. There's nothing to change.

In summary, since the present invention is constructed as described above, the speed change lever mechanism assembled to the lever guide case is not a connecting member that passes through the side surface of the lever guide case, but a lever that is connected from inside the lever guide case. The guide case and the fender are interlocked and connected to the transmission side transmission mechanism by a connecting member passing through both communicating openings formed in the fender and through the inside of the fender. Therefore, when selectively assembling the gear shift lever mechanism to the left and right fenders, unlike the conventional system in which the gear shift lever and the gear shift mechanism are connected by a connecting member that passes through the side surface of the lever guide case, it is necessary to selectively assemble the gear shift lever mechanism to the left and right fenders. One type of lever guide can be used for both left and right fenders without having to prepare a dedicated lever guide case. As a result, it is possible to handle both left and right fenders by simply preparing one type of shift operation unit, which is formed by assembling the shift lever mechanism into the lever guide case, effectively reducing the number of parts that need to be prepared during assembly. In addition to this, it is possible to simplify parts management and reliably reduce costs.

Furthermore, by configuring a part of the gear shift lever mechanism to enter into the fender through both openings, the amount of protrusion of the gear shift operating unit can be kept small, making the gear shift operating unit more compact, and making it easier for workers to get on and off the gear. Disturbance can be prevented as much as possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the speed change operation device for a work traveling machine according to the present invention, in which Fig. 1 is an overall plan view of an agricultural tractor, Fig. 2 is an overall side view of the same, and Fig. 3 is a transverse view. A plan view of the transmission case, FIG. 4 is a longitudinal cross-section of the main parts of the same, FIG. 5 is a side view of the main parts of the speed change operation device, and FIG.
Fig. 7 is an enlarged longitudinal section of the same as above, Fig. 8 is a perspective view of the main part of the same as above, Figs.
Fig. 0 is a longitudinal sectional front view of the main parts of the same, Fig. 11 is a longitudinal sectional front view of the gear shift operating device, Fig. 12 is a schematic side view showing an embodiment in which the gear shift lever is provided on the transmission case side, and Fig. 13. The figure is a plan view of the main parts of the same as above.
FIG. 14 is a longitudinal cross-section of the same speed change operation device, FIG. 15 is an exploded perspective view of the same speed change operation device, and FIGS. 16, 17, and 18 are longitudinal cross sections of the speed change operation showing other examples, respectively. FIG. 2 is a vertical cross-sectional view and a vertical side view of a speed change operation. In the figure, 1 is a traveling aircraft body, 6 is a transmission mechanism, 22 is a fender, 22a is an opening, 23 is a transmission lever,
24 is a lever guide, and 26 and 27 are operating arms.

Claims (1)

[Claims for Utility Model Registration] 1. The base end of the speed change lever mechanism is assembled inside a lever guide case having an opening on the fender fixing surface side to form a speed change operation unit, and the speed change operation unit is mounted on a traveling aircraft. To selectively assemble to either the left or right fender, drill an opening in the lever guide case fixing part of the fender to face the opening on the lever guide case side, and then open both openings inside the lever guide case and fender. A connecting member for interlockingly connecting the base end of the speed change lever mechanism and the speed change mechanism on the transmission case side is passed from inside the lever guide case through both openings and through the inside of the fender. A speed change operation device for a work traveling aircraft, characterized in that it is arranged in a. 2. The speed change operating device for a work traveling vehicle as claimed in claim 1, wherein a part of the base end of the speed change lever mechanism is inserted into the fender through both openings.