JPS5985437A - Throttle valve operating device - Google Patents

Abstract

PURPOSE:To allow a throttle lever to be inverted in its acceleration and deceleration direction with a simple structure, by selectively connecting an acceleration rod linked to a throttle valve with either a front arm or a rear arm integrally connected to the throttle lever. CONSTITUTION:One end of an acceleration rod 7 linked to a throttle valve 3 of an engine 2 is connected with an acceleration arm 13 integrally formed with a rotary arm 20 rotating about a rotary shaft 12. There are provided a front arm 32 and a rear arm 33 rotating integrally with a throttle lever 5 about a rotary fulcrum 23 of the lever 5, and each arm is provided with mount holes 32a and 33a for inserting an upper end 35a of a connecting rod 35 therein. It is possible to invert the throttle lever 5 in its acceleration and deceleration direction only by selectively connecting the connecting rod 35 with either the front arm 32 or the rear arm 33, thus necessitating no extra parts.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a throttle valve operating device for a traveling vehicle such as a tractor.

In addition to an accelerator pedal, a tractor is often provided with a throttle lever as an operating means for opening and closing a throttle valve of an engine. The throttle lever is designed to open and close the throttle valve by rotating the entire accelerator rod back and forth, but the lever rotation direction for accelerating and decelerating is not used. Since the number of parts was required in the opposite direction depending on the country of export, parts had to be replaced depending on the country of export, which was uneconomical.

In this invention, speed increase and
The aim is to standardize throttle lever-related parts, which differ from country to country, by providing a complete operating head that can easily reverse the deceleration relationship.
That is, in the throttle valve operating device according to the present invention, the throttle lever 5 is provided with a front arm 32 that projects forward from its pivot point, C, and a rear arm 33 that projects rearward from the pivot point. At the same time, the rear end of the accelerator door connected to the engine is rotatably connected to the rotating arm 20 of the r rotating member 6, and one end of the connecting rod 35 is connected to the entire rotating member. It is characterized in that the other end can be selectively attached to the front arm or the rear arm of the throttle lever 5.Hereinafter, an embodiment illustrated in the drawings will be described.
FIG. 1 is a schematic diagram of a tractor, and this tractor 11
An accelerator pedal 4 and a throttle lever 5 are provided for operating the throttle valve 3 of the Ci engine 2, and these are connected to the throttle valve 3 via a rotating member 6 and an accelerator door.

The rotating member 6 is provided with a rotating shaft 12 that is rotatably supported by a support member 100 and a support cylinder 11 fixed to the body of the tractor 1, and protrudes in the radial direction from one end of the rotating shaft 12. An accelerator arm 13 is integrally provided, and the accelerator arm 13 is further provided with a connecting piece 14 that projects in the direction of the rotation angle. A mounting hole 13a is provided at the free end of the accelerator arm 13, into which a hook-shaped rear end fl17a of the accelerator rod 7 is fitted and connected. A sleeve 15 is fitted to the opposite end of the rotation shaft 12 and fixed by a pin 16, and a rotation arm 20 having an elongated hole 17 at the free end of the sleeve 15 is fixed. ing.

A throttle lever 5 is provided above the rotating member 6. Lower tube part 2 of throttle lever 5
2 is integrally provided, and a base shaft 23 is screwed into this cylindrical portion 22 and is fixed by lock nuts 24 and 24'. The base shaft 23 is a support plate 26 fixed to the fuselage.
The tip 23a [is the arm base plate 3] which is rotatably fitted into the bearing hole 27 of the
0 is fixed. The arm base plate 30 is provided with a pair of front and rear arms sandwiching the base shaft 23, which is a pivot point, that is, a front arm 32 that projects forward of the pivot point and a rear arm 38 that projects behind the pivot point. ing. Both the front and rear arms 32 and 33 are provided with mounting holes 32a and 38a into which the bent upper end o1535a of the connecting rod 35 is inserted. The bent lower end portion 35bld of the connecting rod 35 and the rotating arm 2
The connecting rod 35 connects the rotating arm 20 and the throttle lever 5.
In the figure, 36 is a split pin. A four part 37 is formed on the cylindrical part 22K of the throttle lever 5, and a washer 2 of the support plate 26 is formed.
6a and the bottom surface of the recess 37 in the direction of extension.
A pressing spring 39 is interposed therebetween.

Further, a lining material 40 for friction is interposed between the arm substrate 30 and the support plate 26, and the lining material 40 is constantly held by the arm substrate 30 and the support plate 26 by the action of the pressing spring 39. The clamping pressure n1 prevents the slot lever 5 from rotating freely.

The accelerator pedal 4 is rotatably provided in the direction of arrow A, and a plate 42 is provided on the rotation axis of the accelerator pedal 4 to rotate together with the accelerator pedal 4.
2 is connected to the connecting piece 14 of the rotating member 6 by a rond 43. A locking piece 41 is provided on the rotating shaft of the accelerator pedal 4, and a tension spring 44 is interposed between the accelerator pedal 4 and the aircraft body.
When you step in the direction, the rotating member 6 rotates in the direction of arrow B,
The throttle valve 3 rotates in the direction of arrow C, and the engine speed increases and decreases. At this time, the rotating arm 20 also rotates upward, but since it is loosely fitted into the elongated hole 17 of the connecting rod 35, this does not occur due to the upward movement of the connecting rod 35.
Keep throttle t/bar 5i in original condition. When the accelerator pedal 4 is stopped being depressed, the throttle valve 3 returns to the deceleration side.

'i! In addition, when the throttle lever 5 is rotated in the direction of arrow B, the connecting rod 35 connected to the front arm 32 is pulled upward, and the rotating arm 20 is rotated together with the rotating member 6 in the direction of arrow B. As a result, the throttle valve 3 opens in the direction of arrow C.

In other words, the throttle lever 5 is fully turned in the direction of the arrow (rearward).
If the engine is rotated, the speed of the engine will be increased.

Next, if the upper end of the connecting rod 35 is removed from the front arm 32 and attached to the rear arm 33, the rotating member 6 will rotate in the direction of arrow B even if the slot symbar 5 is entirely rotated in the direction of arrow B. Since it will not move, throttle valve 8
(opening force) and the engine speed increases. In this case, by rotating the throttle lever 5 in the opposite direction to the arrow C, the throttle valve 8'i can be rotated in the direction of the arrow C to increase the speed.

In this way, by selectively connecting the connecting rod 35 to the front arm 32 or fc to the rear arm 33, the speed increase/deceleration direction of the slot sinber 50 can be reversed. No extra parts are required for switching, and even deer can perform this switching very easily.As explained above, the throttle lever knob It is now possible to share the throttle lever related parts in vehicles where the directions of speed increase and deceleration are contradictory, and it has become extremely easy to switch the rotation direction of the throttle lever for regular use.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the tractor, and Fig. 2 is a (a) front sectional view and (b) side view of the main parts.
2...Engine, 3...Throttle valve, 4...
・Accelerator pedal, 5...Throttle lever, 6...
- Rotating member, 7... Accelerator rod, 12... Rotating shaft, 13... Accelerator arm, 14... Connection piece, 1
7... Elongated hole, 20... Rotating arm, 32... Front arm, 33... Rear arm, 35... Connecting rod. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Agent: Hiroshi Sugawara, patent attorney

Claims (1)

[Claims] 1'1) Connect the opposite end of the accelerator pedal, whose tip is connected to the engine's throttle valve, to the rotating arm of the rotating member, and connect the rotating member and throttle lever with a connecting iron. The throttle valve is opened and closed via a rotating member by rotating the throttle lever, and the throttle lever is provided with a front arm projecting forward from its rotational fulcrum and a front arm extending rearward from the rotational fulcrum. By providing a protruding rear arm and selectively attaching the other end of the connecting rod, one end of which is connected to the rotating member, to the front arm or rear arm, the zero rotation direction of the throttle lever and the rotating member can be adjusted. A throttle valve operating device characterized in that the relationship between the rotational force direction and the rotation direction of the throttle valve can be reversed.