JPS607944Y2 - hand accelerator device - Google Patents

Description

[Detailed description of the invention] This invention relates to a hand accelerator device constructed on an agricultural tractor, etc., and in particular, in a device in which a fixed stand is erected on the vehicle body and a control means is attached to the fixed stand, the hand accelerator lever is
The shaft is mounted using a fixed stand, and the fixed stand side is also used as a stopper for the lever shaft, thereby simplifying the structure of the hand accelerator device and making it advantageous for mass production.

Therefore, the feature here is that a support stand is installed upright on a flat fixed stand on the vehicle body, a control means is attached to this support stand, and a hand accelerator lever protrudes laterally from near the control means. The hand accelerator lever shaft of the handle accelerator lever is supported rotatably around the axis by the fixed base and the upper side of the support base so as to be substantially parallel to the support base. An accelerator interlocking plate that interlocks with the engine's accelerator system is fixed to the hand accelerator lever shaft above the fixed base, and the accelerator interlocking plate has a contact that restricts rotation below idling rotation so that it is flush with the support base. Hereinafter, this invention will be explained with reference to an illustrated example.

The example shown in FIGS. 1 to 7 is for an agricultural tractor, and as is well known, in this type of vehicle, the vehicle body 2 is constructed by directly connecting the transmission case 1 to the front engine.

Reference numeral 3 denotes a bonnet that encloses the engine, and an upper back plate 4 and a lower back plate 5 are detachably attached to the rear end of the bonnet 3 as separate plates.

Inside the bonnet 3, a fuel tank 6 is provided on the rearward front side, and a fixing base 7 to which the rear end of the tank 6 is attached is erected on the rear side.

As shown in Fig. 3, this fixed stand 7 is made by integrally forming a base 8 and a support stand 9 erected in the center. Specifically, a horizontal plate is attached to the upper ends of a pair of left and right vertical plates. The support base 9 is formed of vertical plates facing left and right.

Reference numeral 10 denotes an integral type power steering unit fixed to a base 8 center shaft, and a steering post 12 that swings back and forth around a horizontal axis 11 corresponds to the upper part of the unit, and these upper and lower parts are connected by a universal joint 13. .

In this case, in order to lock the post 12 with the handle 14 at a desired angle, a U-shaped branch 15 is welded to the front abdomen of the post 12, and a lock pin 16 protruding rightward is attached to the branch 15 by a spring. A lock plate 20, which is provided with a large number of lock holes 18 and front and rear stoppers 19 and 19, is provided protruding from the upper end of the right brain of the fixed base 7, so that the instrument can be moved forward and backward. It is configured to be tilted back and forth and locked at a desired angle by operating a tilt lever 22 protruding from the panel 21.

The fixed base 7 is equipped with a hand accelerator lever shaft 23 formed in a dogleg shape as shown in the figure, and a pair of left and right hydraulic clutch operating levers 24, 24, making use of the space in the right brain. .

For the hand accelerator lever shaft 23, a horizontal fixing tongue piece 25 is projected from the right side wall of the support base 9 of the fixing base 7, and a right-facing pivot tongue piece 26 is fixed from the upper front part thereof with a bolt 27. By doing so, the upper part of the shaft can be rotated freely, and the lower end of the shaft can be rotated freely.
An accelerator interlocking plate 28 is fixed around the axis, and is inserted into a through hole penetrated through the base 8, which has a catch 29 at the bottom, and is stopped from below via a spring 30, a nut 31, etc. There is.

In the above case, the pivot tongue piece 26 can freely move relative to the fixed tongue piece 25 through the elongated hole 32, so that the hole 33 of the pivot tongue piece 26 is configured to fit perfectly with the center of the through hole of the base 8. Further, the lower accelerator interlocking plate 28 has a substantially fan shape and is capable of reciprocating horizontally, with 3
4, 34a are provided, and when the lever shaft 23 is turned in the direction of H in the figure, an interlocking protrusion 3 protruding around the accelerator interlocking plate 28 is provided.
The accelerator wire 36 is pulled through 5 to increase the engine speed, and the hit 34a is connected to the support base 9 on the fixed base 7.
The maximum rotation speed is determined by direct contact with the

On the other hand, when the lever is operated in the direction shown, the speed is decelerated and the other hit 34 comes into surface contact with the support base 9 on the fixed base 7, thereby regulating the idling speed.

The situation is shown in Figure 7.

On the other hand, the hydraulic clutch operation lever 24.24 has a lever pin 37 protruding and fixed on the right side of the fixed base 7 via the fixed tongue piece 25, and two types of levers 24.24 are attached around the axis of the pin 37.
It is supported by 24.

One lever 24 on the right side is an auxiliary gear shift lever for the rear wheels, and the one on the left side is a lever for switching on and off the front wheels.
It projects toward the operator through a window 38 provided near the right side of the brain.

In this case, 39 is a control valve fixed on the vehicle body 2 in the fixed base 7, and the valve 39 is equipped with two spool return springs (not shown) on the left and right, and springs each spool and the levers 24, 24. Flexible collaboration rod 40
, 40.

Therefore, when both levers 24, 24 are operated from the downward movement position to the upward movement position as shown in FIG.
The upper end of 0 exceeds the consideration point, resulting in what is called an unstable switching type.

Therefore, in the above configuration, the stopper role of the hand accelerator lever shaft 23 at high and low speeds is the fixed base 7 itself to which the control means is attached, and by making this dual use possible, it is necessary to weld a separate piece as a stopper on the fixed side. Furthermore, there is no fear that the stopper will come off due to forceful operation, which is very advantageous both in manufacturing and in use.

In particular, if the pivot tongue piece 26 is of a movable type, the hand accelerator lever shaft 23 can be assembled in a state where it can be easily rotated.
Not only is this advantageous in terms of operation, but the degree of wear is also significantly reduced.

This invention is as described above, and the hand accelerator lever shaft is supported using a fixed base and a support base for mounting the control means, and the abutment of the accelerator interlocking plate fixed to the accelerator lever shaft is in contact with the support base. Not only is this configuration extremely advantageous in terms of mass production due to the structural simplification, but the accelerator operation can be performed very stably and reliably since it has a strong base called a fixed base as a support. This is the translation.

In addition, it restricts rotation below idling speed.
is provided in surface contact with the support base 9, so
This can be reliably regulated, especially on the idling side, where there are many opportunities for contact, but because the contact occurs through surface contact, damage such as wear can be reduced.

[Brief explanation of the drawing]

Figure 1 is a perspective external view from above showing an example of this invention;
Fig. 2 is a vertical side view of the same, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, Fig. 4 is a perspective view showing the support state and operating state of the hydraulic clutch operation lever and hand accelerator lever shaft, and Fig. 5
The figure is a perspective view showing the accelerator interlocking system such as the accelerator interlocking plate and the accelerator wire, and Fig. 6 is a sectional view taken along the line VI-VI of Fig. 2.
FIG. 7 is a sectional view taken along the line ■--■ in FIG. 2. 2... Vehicle body, 7... Fixed stand, 12.1
4. Curving/control means, 23...Hand accelerator lever axis.

Claims (1)

[Scope of utility model registration request] A support stand 9 is erected on a flat plate-shaped fixed stand 7 on the vehicle body, a control means is attached to the support stand 9, and a hand accelerator lever is provided that projects laterally from the vicinity of the control means. The hand accelerator lever shaft 23 of the hand accelerator lever is supported rotatably around the axis by the fixed base 7 and the upper side of the support base 9 so as to be substantially parallel to the support base 9. An accelerator interlocking plate 28 that interlocks with the accelerator system of the engine is fixed to the lever shaft 23 above the fixed base 7, and the abutment 34 that restricts rotation below idling rotation is supported on the accelerator interlocking plate 2B. Platform 9
A hand accelerator device characterized in that it is provided so as to make surface contact with the hand accelerator device.