JPH054424Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a gear shift lever device for a traveling vehicle such as a tractor.

(Prior Art) For example, the shift lever device of an agricultural tractor includes a main shift, a sub-shift, a cleave shift, or a compound shift that combines a sub-shift and a cleave shift.
Each swings a gear lever supported by a pivot,
The shift arm fixed to the shift rod is configured to swing via a connecting rod.

The gear shift lever is inserted into a guide groove of a guide plate and its swing is guided, and a length adjustment mechanism such as a turnbuckle is provided on the connecting rod so that the neutral position is in the center of the guide groove. The structure is such that the position can be adjusted.

(Problems to be Solved by the Invention) In the prior art described above, a length adjustment mechanism can be provided when the connecting rod is long and straight, but when the connecting rod is bent or short, a length adjustment mechanism can be provided. It may be difficult to provide a length adjustment mechanism for
Further, if the connecting rod is located below the speed change lever, other structural members of the tractor may become an obstacle, making adjustment work difficult even if a length adjustment mechanism is provided.

(Means for Solving the Problems) The present invention provides a pivot shaft 17 that serves as a swinging fulcrum for a support member 13 that pivots the gear shift lever 12 via a pivot shaft 15.
By making use of the above-mentioned mechanism to make the axial position of the pivot 17 adjustable with respect to the bracket 19, all of the problems of the prior art described above can be solved.

That is, the specific configuration of the problem solving means in the present invention is such that the support member 13 is attached to the fixed bracket 19, and the shift lever 12 is swung in the first swing direction 37 via the first pivot 15 on the support member 13. A position adjustment mechanism includes a guide plate 10 that supports the shift lever 12 so as to be movable and guides the swinging of the shift lever 12, and adjusts the position of the first pivot 15 in the first swing direction 37 of the shift lever 12 with respect to the bracket 19. 22, the speed change lever 12 is mounted on the support member 13 in a second direction perpendicular to the first swing direction 37.
A second pivot shaft 17 is provided which serves as a fulcrum when swinging in the swing direction 38, and this second pivot shaft 17 is supported by the bracket 19 with an axial position adjuster 23 interposed therebetween.

(Function) When the shift lever 12 is swung around the pivot 15 of the support member 13, the swiveling lever 33 pivotally supported by the bracket 19 swings, and the cleave shift arm 7 is moved through the connecting rod 35. The rotation is operated. A threaded cylinder 23 is screwed into a bracket 19 fixed to the tractor body 1, and a support member 13 is attached to the end of a pivot shaft 17 supported within the threaded cylinder 23. , the pivot shaft 15 that pivots the speed change lever 12 is adjusted in position in the swing direction 37 of the speed change lever 12, and the upper part of the speed change lever 12 is positioned in the swing direction 37 with the lower end engaged with the swing lever 33 being centered. The position can be adjusted to the center of the guide groove 11 of the guide plate 10.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In Figures 1 to 4, 1 is the mission case 2.
A brake case 3 is provided on the left and right rear sides of the tractor body, and a hydraulic device 4 for raising and lowering the working machine is mounted on the rear upper part.

Although not shown, inside the tractor body 1, there are built-in a main transmission, an auxiliary transmission, a cleave transmission necessary for the traveling system, a PTO transmission necessary for the PTO system, etc. A shifter shaft 5 of the shifter for switching protrudes from near the brake case 3, a shifter shaft 6 of the shifter for switching the cleave transmission protrudes from the inside of the transmission case, and a shift arm 7 is attached to this shifter shaft 6. It is being

8 is a floor sheet that covers the rear upper part of the tractor body 1; 9 is a rear wheel fender arranged on the left and right sides of the floor sheet 8; a guide plate 10 is fixed to the inner surface of the left rear wheel fender 9; A gear shift lever 12 is guided by the groove 11.

The shift lever 12 is a multi-lever that combines sub-shift switching and cleave shift switching, and a boss portion 14 in the middle thereof is connected to a longitudinal axis (first axis) 1.
5, and an engagement ring 16 is provided at the bottom thereof.

Reference numeral 13 denotes a support member, on which the longitudinal axis 1 is mounted.
5 is supported, and one end of a left-right pivot (second pivot) 17 in a direction perpendicular to this front-rear pivot 15 is fixed. Further, a pin 18 is implanted in the lower part of the support member 13.

A bracket 19 is fixed to the tractor body 1, and is fixed to a mounting member 20 projecting outwardly from the hydraulic system 4 and a mounting bolt 21 projecting from the brake case 3 via bolts, respectively.
A screw hole 19a is formed in the upper part of the bracket 19, into which a screw tube (axial position adjustment tool) 23 having a male thread is screwed, and the bracket is secured by a lock nut 24 screwed onto the male screw. 1
Rotation can be stopped against 9.

The left and right pivots 1 of the support member 13 are attached to the threaded cylinder 23.
7 passes through the support member 1, and is prevented from coming off with a retaining ring 25, etc., so that the gear shift lever 12 is attached to the support member 1.
3, it can swing around the left and right axis 17.

A bearing portion 26 is formed at the lower part of the bracket 19, and one end of a transmission shaft 27 is pivotally supported by the bearing portion 26. The other end of the transmission shaft 27 is spline-fitted to the sub-transmission shifter shaft 5.
A pin 29 is implanted at the tip of the arm portion 28 protruding from the support member 13.
8 by a length-adjustable connecting member 30.

Further, the lower part of the bracket 19 is bent horizontally, and a vertical shaft 32 is provided at the tip thereof in a downwardly projecting manner, and a bell crank-shaped swinging lever 33 is rotatably supported on this vertical shaft 32. has been done. A pin 34 that engages with the engagement ring 16 of the gear shift lever 12 is installed at one end of the swing lever 33 in an upwardly projecting manner, and a pin 34 that is connected to the connecting rod 35 is installed at the other end of the swing lever 33.
6 has been planted. The front end of the connecting rod 35 is connected to the lower end of the shift arm 7 for cleave shifting.

The engagement ring 16 is elongated in the front-rear direction, and engages with the pin 34 only when the shift lever 12 swings in the left-right direction about the front-rear pivot shaft 15 as a fulcrum, and swings about the left-right pivot shaft 17 as a fulcrum. If you do,
The engagement ring 16 and the pin 34 move relative to each other. The connecting rod 35 is bent at two points in the middle to avoid interference with vehicle components not shown.

As shown in FIG. 4, the speed change operation using the speed change lever 12 is performed by swinging the speed change lever 12 in the left-right direction (first swing direction) 37 in FIG. Then, the front and rear axis 1
5 as a fulcrum, rotates the swinging lever 33 through the engagement between the engagement wheel 16 and the pin 34, swings the shift arm 7 via the connecting rod 35, and operates the Cleave transmission. Switch to high speed or low speed. When the shift lever 12 is swung back and forth from this state, the support member 13 is swung in the direction of arrow 38 in FIG.
0, the transmission shaft 27 and shifter shaft 5 are integrally rotated to switch the auxiliary transmission between high speed and low speed.

If the speed change lever 12 is unevenly located to one side from the center of the guide groove 11 in FIG. If it is shifted left or right, loosen the lock nut 24 and move the threaded tube 23 forward or backward to adjust the position of the left and right pivots 17 in the axial direction, thereby shifting the front and rear pivots 15 together with the support member 13 relative to the bracket 19. Correct by adjusting the position of the lever 12 in the swinging direction 37.

The screw tube 23, lock nut 24, screw hole 1
9a, the support member 13, etc., the guide groove 11
A position adjustment mechanism 22 is configured to adjust the position of the speed change lever 12 relative to the position of the gear shift lever 12.

The present invention is not limited to the above embodiments, but can be modified in various ways.

5 to 7 show an example of an air conditioner for a tractor cabin. Reference numeral 41 denotes an air conditioner body disposed within the cabin 42 or the bonnet 43, which includes a blower, a heater, and/or a cooler, and has a nozzle 45 connected to its discharge port via a flexible hose 44. .

A plurality of discharge ports 45a are formed in the nozzle 45, and one or more suction cups 46 are provided. This suction cup 46 is for adhering to the glass surface of the cabin 42, and can also be adsorbed to the windshield 47 or side glass, or to the rear glass 48 by connecting an extension hose to the flexible hose 44. .

Also, the nozzle 45 has foot hoses 49 on both sides.
are connected to each other and hang down to the left and right steps 50.

The air conditioner device having the above configuration can be installed in the existing cabin 4.
2, and can be used not only to adjust the temperature inside the cabin 42, but also to defog the windshield 47, rear glass 48, etc., and operate the tractor 1 in a forward-facing position as shown by the solid line in Figure 5. Whether the nozzle 45 is operated in a backward position as shown by the two-dot chain line in FIG.

It is preferable that the nozzle 45 is provided with a shutter for opening and closing the communication port with the discharge port 45a and the foot hose 49.

The air conditioner main body 41 and the nozzle 45 may be connected by using a single flexible hose 44 or by using a T-shaped pipe 51 as shown in FIG. 8. This T-shaped pipe 51 is branched into two parts from a port 51a connected to the flexible hose 44 so that air can be blown to the nozzle 45 and one foot hose 49 side, and the flexible hose 44 and the foot hose 49 are shortened. It is now possible to form. However, in this case, since the branch plate 52 is located at the center of the opening 51a, a larger amount of wind flows toward the foot hose 49 side where wind resistance is lower.
A resistance adjuster 53 made of a spring plate or the like is provided at the tip of the branch plate 52. This resistance adjuster 53
has a tongue piece 53a, and by this tongue piece 53a,
Resistance is provided to the wind flowing toward the foot hose 49 side, and the amount of air flowing toward the nozzle 45 side is equal to or smaller than that.

(Effect of the invention) According to the invention described in detail above, the support member 13 is attached to the fixed bracket 19, and the shift lever 12 is attached to the support member 13 through the first pivot 15 in the first swing direction 37. A guide plate 10 is provided to support the shift lever 12 in a swingable manner and guide the swinging of the gear shift lever 12.
The shift lever device is provided with a position adjustment mechanism 22 for adjusting the position of the first pivot shaft 15 in a first swinging direction 37 of the shift lever 12 with respect to the bracket 19, and the shift lever 12 is mounted on the support member 13. 1
A second pivot shaft 17 is provided that serves as a fulcrum when rocking in a second rocking direction 38 perpendicular to the rocking direction 37,
Since the second pivot shaft 17 is supported by the bracket 19 via the axial position adjuster 23, the shift lever 12 can be moved in the first swing direction 37 and the second swing direction 3.
Even if it is operated by swinging in two directions with 8,
With a simple configuration that also serves as the second pivot 17, the position of the first swing direction 37 when the gear shift lever 12 is in neutral can be adjusted, and the position can be adjusted even if a rod length adjustment mechanism such as a turnbuckle is not provided. Adjustment mechanism 22 is applicable.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a cross-sectional side view of the main part, FIG. 2 is a view taken in the direction of the arrow in FIG. 1, FIG. The figure is a sectional view taken along the - line in Figure 1, Figures 5 to 7 show an example of a cabin air conditioner, Figure 5 is an overall side view, Figure 6 is a perspective view of the main parts, and Figure 7 is a perspective view of the main parts. 8 is a rear view of the inside of the cabin, and FIG. 8 is a sectional view showing another example of the connection structure between the air conditioner main body and the nozzle. 1... Tractor body, 10... Guide plate, 12
...Speed lever, 13... Support member, 15... Front and rear pivots, 17... Left and right pivots, 19... Bracket, 23... Threaded tube.

Claims (1)

[Claims for Utility Model Registration] A support member 13 is attached to the bracket 19 on the fixed side, and the gear shift lever 12 is supported on the support member 13 via a first pivot 15 so as to be swingable in a first swing direction 37. A guide plate 10 is provided to guide the swinging of the speed change lever 12, and the first pivot 15 is connected to the bracket 19 in the first swing direction 37 of the speed change lever 12.
The gear shift lever device is provided with a position adjustment mechanism 22 for position adjustment, and the support member 13 has a fulcrum point when the gear shift lever 12 is swung in a second oscillation direction 38 perpendicular to a first oscillation direction 37. A shift lever device characterized in that a second pivot shaft 17 is provided, and the second pivot shaft 17 is supported by a bracket 19 with an axial position adjustment tool 23 interposed therebetween.