JPH0220093Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an accelerator device for a traveling vehicle such as an agricultural tractor.

<Prior art> Accelerator devices for tractors, etc. are equipped with a foot accelerator pedal, which is mainly used when driving on the road, and a hand accelerator lever, which is mainly used during work, and these operating systems have been simplified and cost reduced. In order to achieve this, the same member is used for transmission from the middle.

In other words, the rod for operating the speed adjustment lever is connected to the relay rotating body, and the rod to which the depressing motion of the foot accelerator pedal is transmitted is connected to the relay rotating body, and the rotating motion of the hand accelerator lever supported by the support shaft is controlled by the actuating member. In order to prevent the hand accelerator lever from being rotated even when the foot accelerator pedal is depressed, the actuating member is configured to transmit information via the relay rotating body only when the hand accelerator lever is rotated in the acceleration direction. The structure is such that the operating force is transmitted by engaging with the

<Problem that the invention aims to solve> By the way, the direction of rotation of the hand accelerator lever in Japan and foreign countries is exactly opposite, so pulling the lever toward you on Japanese tractors increases the speed, while on foreign tractors, pulling the lever toward you increases the speed. In a tractor, pressing the lever forward increases the speed, and two types of accelerator devices must be prepared, which results in no compatible parts and increases costs.

<Means for Solving the Problem> In view of the problems of the conventional device, the present invention forms the actuating member with two arms that are detachably and selectively attached to the spindle of the hand accelerator lever. The relay rotating body is formed with two engaging parts where each arm engages, and the relationship between each arm and the engaging part is such that the forward and reverse rotations of the hand accelerator lever increase the speed of the relay rotating body. To provide an accelerator device in which the hand accelerator lever can be operated in the opposite direction simply by replacing the arm.

A feature of the present invention for achieving this purpose is that a rod 15 that transmits the depressing action of the foot accelerator pedal 9 is connected to the relay rotating body 14 that operates the speed adjustment lever 16, and a rod 15 that transmits the depression operation of the foot accelerator pedal 9 is connected to the relay rotating body 14 that operates the speed adjustment lever 16. In an accelerator operating device that engages an actuating member 30 that transmits rotational movement in the speed increasing direction of a supported hand accelerator lever 23, the actuating member 3
0 has a first arm 30A and a second arm 30B that are detachably and selectively attached to the support shaft 19, and the relay rotating body 14 increases when the hand accelerator lever 23 is rotated in one direction. A first engaging portion 34A that engages with the first arm 30A to rotate in the speed direction A, and a first engaging portion 34A located on the opposite side of the first engaging portion 34A with the rotation center 33 of the relay rotating body 14 as a border. In addition, when the hand accelerator lever 23 is rotated in the opposite direction, the second arm 3 is rotated in the speed increasing direction A.
The second engaging portion 34B that engages with the second engaging portion 34B is formed respectively.

<Function> When the first arm 30A is attached to the support shaft 19 and engaged with the first engaging portion 34A of the relay rotating body 14, when the hand accelerator lever 23 is rotated in the forward direction C, the relay rotating body 14 is rotated. When the speed adjustment lever 16 is operated in the speed increasing direction A via the rod 17 and rotated in the extrusion direction D, the first arm 30A separates from the first engaging portion 34A.

When the second arm 30B is attached to the support shaft 19 and engaged with the second engaging portion 34B of the relay rotating body 14, when the hand accelerator lever 23 is rotated in the pushing direction D, the relay rotating body 14 accelerates. Rotate in direction A,
When the second arm 30B rotates in the forward direction C, the second arm 30B separates.

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

In Figs. 1 to 6, reference numeral 1 denotes a tractor body formed by connecting an engine 2, a clutch housing 3, a transmission case 4, etc., and a hydraulic or mechanical steering device 5 is disposed above the clutch housing 3. 6 indicates its handle post.

Steps 7 are arranged on the left and right sides of the vehicle body 1, and normally a foot accelerator pedal 9 supported via a shaft 8 is arranged on the right step 7, and is depressed against a return spring 10.

Reference numeral 11 denotes an accelerator device including the foot accelerator pedal 9, and a support base 12 that supports the main part thereof is mounted on the upper part of the vehicle body 1, for example, the steering device 5.
is placed on the side of the

Reference numeral 14 denotes a bellcrank-shaped relay rotating body that is loosely fitted to a shaft 13 fixed to the support base 12. One end of the rotating body is connected to the foot pedal 9 via a rod 15, and the other end is used for speed adjustment to operate the governor of the engine 2. They are connected via a lever 16 and a rod 17, and the direction of arrow A is the speed increasing direction.

A bearing part 18 is formed at the upper part of the support base 12,
A spline support shaft 19 is supported through this bearing portion 18 . 20 is a bracket 21 on the support stand 12
The guide tube is fixed through the guide tube, and has an inner circumferential surface that is coaxial with the bearing part 18 and has a larger diameter than the support shaft 19.

The boss portion 24 of the hand accelerator lever 23 is spline-fitted to the tip of the support shaft 19, and
Threaded portion 26 of connecting shaft 25 inserted into boss portion 24
are connected by screws. The connecting shaft 25 is also formed with a threaded portion 27 on the opposite side, into which a frictional force imparting member 28 such as a disc spring is fitted, and a nut 29 is screwed into the connecting shaft 25 to prevent the hand lever 23 from slipping out and provide rotational resistance. There is.

Reference numeral 30 denotes an actuating member formed by welding an L-shaped bar to a cylindrical member, and is spline-fitted to the support shaft 19 between the bearing portion 18 and the guide cylinder 20. It can rotate integrally with the hand lever 23. The actuating member 30 has a short first arm 30A and a long second arm 30B, and is detachably attached to the support shaft 19 as an alternative.

The relay rotating body 14 has a first engaging portion 34A with which the first arm 30A engages, and a second engaging portion 34A with which the second arm 30B engages, at positions sandwiching the shaft 33 (rotation center).
An engaging portion 34B is formed. Relay rotating body 1
4, the rotational direction indicated by arrow A is the speed increasing direction, the first and second engaging portions 34A and 34B both face the same direction with respect to the rotational direction, and the first and second arms 30A, The directions in which the 30B engage and apply rotational force are the same.

However, it passes through the center of axis 33 and axes 19, 33
The first and second engaging portions 34 are located on opposite sides of the virtual center line that is orthogonal to the center line that connects the
A, 34B are arranged, so the first arm 3
0A is the first engaging portion 34A when rotated clockwise in Figure 3.
The relay rotating body 14 is rotated in the speed increasing direction A, and at this time the hand lever 23 is rotated in the forward direction C. In contrast, the second arm 30
B is the second engaging portion 34B by rotating counterclockwise in FIG.
The relay rotating body 14 is rotated in the speed increasing direction A, and the hand lever 23 is rotated in the pushing direction D at this time.

When the first and second arms 30A, 30B rotate in the opposite direction, they rotate in the direction of separation so that they do not engage with the engaging portions 34A, 34B, and the relay rotating body 14 returns the spring 10 or the speed adjustment lever 16. It is rotated in the deceleration direction B by the spring. At this time, the first and second engaging portions 34A and 34B try to contact the first and second arms 30A and 30B, respectively.

A stopper 35 is formed of a bolt screwed onto a bracket 36 fixed to the support base 12, and comes into contact with the relay rotating body 14 to adjustably set the limit of rotation in the speed increasing direction A. 37 is a rock nut.

Note that the relay rotating body 14 is not limited to the bell crank shape shown in the above embodiment, but may have a disc shape that connects the rods 15 and 17 and has protrusions that engage with the first and second arms 30A and 30B, respectively. Two protrusions are provided, and these protrusions are connected to the first and second engaging portions 34A, 3.
It may also be 4B.

<Effects of the invention> According to the invention detailed above, the actuating member 30 has a first arm 30A and a second arm 30B that are detachably and selectively attached to the support shaft 19,
The relay rotating body 14 has a first engaging portion 34A that engages with the first arm 30A to rotate in the acceleration direction A when the hand accelerator lever 23 is rotated in one direction.
and is located on the opposite side of the first engaging portion 34A with respect to the rotation center 33 of the relay rotation body 14 and rotates in the acceleration direction A when the hand accelerator lever 23 is rotated in the opposite direction. A second engaging portion 34B that engages with the second arm 30B is formed, and the support shaft 1
The first arm 30A is attached to the relay rotating body 14.
When engaged with the first engaging portion 34A of When rotated in direction D, the first arm 30A engages the first engaging portion 34A.
When the second arm 30B is attached to the support shaft 19 and engaged with the second engaging portion 34B of the relay rotating body 14, when the hand accelerator lever 23 is rotated in the pushing direction D, the relay rotating body 14 is the speed increasing direction A
When the second arm 3 rotates toward the front direction C, the second arm 3
Since 0B is separated, two arms 3 are attached to the support shaft 19.
0A and 30B are installed alternatively and the relay rotating body 14 is installed.
Simply engage the hand accelerator lever 23.
The operation of the device can be reversed, the device can be easily changed for domestic use and overseas use, and devices with two different types of operation can be manufactured simply and at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is an overall side view, Fig. 2 is a cross-sectional front view of the main part, Fig. 3 is an enlarged side view, and Fig. 4 is a state in which the operating hand is reversed. 5 is a side view of FIG. 3, a cross-sectional view taken along the line -
FIG. 6 is a perspective view of the actuating member. 1... Tractor body, 2... Engine, 3...
Clutch housing, 9... Foot accelerator pedal, 11... Accelerator device, 12... Support stand, 1
4... Relay rotating body, 15... Rod, 16... Speed adjustment lever, 17... Rod, 19... Spline support shaft, 23... Hand accelerator lever, 30
...Operating member, 30A...First arm, 30B...
...Second arm, 34A...First engaging portion, 34B...
...Second engaging portion, A...speed increase direction, B...deceleration direction, C...front direction, D...extrusion direction.

Claims (1)

[Scope of utility model registration request] Relay rotating body 14 that operates the speed adjustment lever 16
, an accelerator operation in which a rod 15 that transmits the depression action of the foot accelerator pedal 9 is connected, and an actuating member 30 that transmits the rotational action in the acceleration direction of the hand accelerator lever 23 supported by the support shaft 19 is engaged. In the device, the actuating member 30 is a first member detachably and alternatively attached to the support shaft 19.
It has an arm 30A and a second arm 30B, and the relay rotating body 14 has a first arm 30A that engages with the first arm 30A to rotate in the acceleration direction A when the hand accelerator lever 23 is rotated in one direction. 1 engaging part 34A
and is located on the opposite side of the first engaging portion 34A with respect to the rotation center 33 of the relay rotation body 14, and rotates in the acceleration direction A when the hand accelerator lever 23 is rotated in the opposite direction. An accelerator device characterized in that second engaging portions 34B are respectively formed to engage with the second arm 30B.