JPH0343397Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a tractor engine control device, and more specifically, a tractor engine control device that controls an engine governor by rotating an operating lever or foot accelerator pedal. Regarding equipment.

(B) Prior art In general, a tractor engine control device includes a manual operation lever and a foot accelerator pedal, and the rotation fulcrum of the operation lever and the rotation fulcrum of the foot accelerator pedal are provided separately. Furthermore, a stopper was fixed to the operating lever, and an interlocking arm was fixed to the foot accelerator pedal. When the operating lever is rotated, the arm fixed to the foot accelerator pedal is rotated in conjunction with the rotation of the operating lever, and the governor is operated in conjunction with the rotation of the pedal to control the engine. When the operating lever was rotated within a predetermined range, a stopper fixed to the lever came into contact with a stopper receiver to restrict rotation.

(c) Problems to be solved by the invention However, in this engine control device, the rotational fulcrum of the operation lever and the rotational fulcrum of the foot accelerator pedal are configured separately, and furthermore, the rotational fulcrum of the stopper comes into contact with the stopper. The stopper receiver, which regulates the
The engine control device has a complicated structure composed of many parts, and its disassembly and assembly are extremely troublesome.

(d) Means for solving the problem The purpose of the present invention is to solve the above-mentioned problems, and a support member having a mounting surface substantially perpendicular to the side surface of the clutch housing of the tractor is disposed. Further, a shaft is fixed to the mounting surface of the support member in a substantially horizontal direction, an operating lever is rotatably disposed in a substantially vertical direction at the base end of the shaft, and the free end of the shaft is fixed to the mounting surface of the support member. A foot accelerator pedal connected to the governor is rotatably placed in the
Further, a stopper having protrusions in at least two directions is fixed to the operating lever, and the protruding parts of the stopper extending in two directions abut against the support member, thereby regulating the rotation range of the operating lever,
The present invention is characterized in that the operating lever is integrally provided with a protrusion that abuts the foot accelerator pedal on the side opposite to the support member, so that the pedal can be rotated in conjunction with the foot accelerator pedal.

(e) Effect By employing the above-mentioned means, when the operator rotates the operating lever, the stopper having protrusions in two directions rotates together with the lever, and further extends in the other direction in conjunction with the rotation of the stopper. The foot accelerator pedal, which is in contact with the provided protrusion, rotates, and as the pedal rotates, the governor operates to control the engine. Furthermore, when the operator rotates the control lever within a predetermined range, one of the protrusions that extend in two directions other than the protrusion that is in contact with the foot accelerator pedal comes into contact with the support member and prevents the rotation. When the operating lever is further rotated within a predetermined range in the opposite direction, the other of the protrusions extending in two directions comes into contact with the support member and restricts the rotation.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 4, the tractor 1 has a vehicle body 3 suspended by wheels 2. A driver's seat 5 is disposed at the rear of the vehicle body 3, and an operation panel of the driver's seat 5 is provided. An operating lever 6 having a grip portion 6a is disposed at 5a, and a foot accelerator pedal 7 is rotatably disposed below the driver's seat 5. Further, an engine 9, a clutch housing 10, etc. are disposed at the front of the vehicle body 3. In FIG. 4, reference numeral 8 denotes an intermediate case that connects and fixes the clutch housing 10 and the transmission case M located at the rear of the fuselage. The main shaft, which has been moved downward relative to the crankshaft, is inserted therethrough, so that the upper surface of the case 8 is substantially flush with the step surface S, forming a wide flat footrest surface. Further, H is a steering wheel.

As shown in FIGS. 1 and 2, a support member 11 is formed on the side surface of the clutch housing 10 in a substantially horizontal direction, and the boss 11 has an operating lever receiving portion 12a. A shaft 12 is installed horizontally and is prevented from loosening by a nut 13. Further, a hole 12a' passes through the operating lever receiving portion 12a of the shaft 12 in a substantially vertical direction.
An operating lever 6 is rotatably inserted into 2a', and the lower end of the operating lever 6 protruding from the lower surface of the hole 12a' is locked with a nut 15, and the upper surface of the hole 12a' and the operating lever A disc spring 17 is compressed between the C pin 16 fixed to the lever 6 and applies friction to the rotation of the operating lever 6. In addition, the operating lever 6 has protrusions 19 in three directions.
A stopper 19 having a, 19b, and 19c is fixed, and the protruding parts 19a and 19b in two directions are bent and extended so as to straddle the supporting member 11, and the protruding part 19a or the protruding part 19b is The rotation range of the operating lever 6 is restricted by the contact, and the other protrusion 19c extends in the opposite direction to the protrusions 19a and 19b in the two directions, and its tip is on one side of the foot accelerator pedal 7. It is in contact. Further, a foot accelerator pedal 7 is rotatably supported at the tip of the shaft 12 by being secured to a C pin 20. The upper end is operated by the pedal 7.
It is fixed to an operating rod bar 21 which is arranged perpendicularly to the main body. Further, one end of the operating rod bar 21 is rotatably secured by a snap pin 25 to one end of an operating rod 23 which is disposed on the fuel tank bracket 22 so as to be movable back and forth. , a spring 26 whose other end is latched to the fuel tank bracket 22 is tensioned, and the operating rod bar 21 is biased in the direction of arrow A. Further, a joint portion 27 is connected to the other end of the operating rod 23, and the tip of the joint portion 27 is connected to a governor 29 of the engine 9, and the engine 9 is controlled by rotation of the governor 29.

Since the present embodiment has the above-described configuration, the operating lever 6 is rotated counterclockwise so that the protrusion 19b of the stopper 19 fixed to the lever is in contact with the support member 11, as shown by the solid line in FIG. When the foot accelerator pedal 7 is stopped and held at the maximum rotation range position in the direction shown in FIG. The governor 29, which is interlocked through the engine, is stopped at the rightmost position of its rotation range, and the engine 9 is controlled to a low idle. When the operating lever 6 is rotated clockwise, the stopper 19 is rotated together with the rotation of the lever 6, and the foot accelerator pedal 7, which is in contact with the protrusion 19c of the stopper 19, is moved against the spring 26. Rotated in the direction of arrow B,
Furthermore, in conjunction with the rotation of the pedal 7, the operating rod 2
3 is moved in the direction of arrow C, and the governor 29 is moved in the direction of arrow D.
The rotation of the engine 9 is increased from low idle. At this time, when the rotation of the control lever 3 is stopped midway through its rotation range, the lever 6 is stopped and held at that position by the friction of the disc spring 17, and the governor 29 rotates in synchronization with the control lever 6. The rotation of the engine 9 is maintained at a rotation speed corresponding to the rotation of the operating lever 6. Furthermore, as shown by the chain line in FIG. 3, the operating lever 6 is rotated clockwise and stopped and held at the maximum rotation range position in the clockwise direction where the protrusion 19a of the stopper 19 comes into contact with the support member 11. Then, the governor 29 is stopped at the leftmost position of its rotation range in synchronization with the rotation of the operating lever 6, and the rotation of the engine 9 is controlled to the maximum rotation. Further, when the operating lever 6 is rotated counterclockwise from its maximum clockwise rotation range, the stopper 19
The protrusion 19c is rotated, and the protrusion 19c
The foot accelerator pedal 7 is rotated in the direction of the arrow E in accordance with the spring 26, and the operating rod 23 is moved in the direction of the arrow F in conjunction with the rotation of the pedal 7. The engine 9 is rotated in the direction of arrow G, and the rotation of the engine 9 is reduced from the maximum rotation.

Furthermore, when the foot accelerator pedal 7 is rotated in the direction of arrow B while the operation lever 6 is stopped and held at an arbitrary position, the pedal 7 resists the urging force of the spring 26 in the direction of arrow A and presses the stopper 19. The governor 29 is separated from the protrusion 19c and rotated in the direction of arrow D in conjunction with the operating rod 23 in the same manner as described above, and the rotation of the engine 9 is controlled in response to the rotation of the foot accelerator pedal 7. Then, when the force acting on the rotation of the foot accelerator pedal 7 is removed, the pedal 7 is moved by the spring 26.
The engine 9 is rotated by the urging force in the direction of the arrow A to the original state, that is, to the control position of the engine 9 corresponding to the control lever 6 held at an arbitrary position.

(g) Effects of the invention As explained above, according to the invention, the operation lever receiving portion 12 uniaxially fixed to the support member 11
Since the operating lever 6 and the foot accelerator pedal 7 are supported on the shaft 12 and the operating lever 6, the operating lever and the foot accelerator pedal can be supported at one place, which simplifies the support structure and facilitates maintenance. In addition, the two-direction protrusions 19a, 19 of the stopper 19 fixed to the operating lever 6
b comes into contact with the support member 11 to restrict the rotation range, so there is no need for a special stopper receiving part, the structure of the stopper part is simplified, and the rotation range of the operating lever can be reliably restricted. Become.
Furthermore, the operating lever 6 is provided with two-direction protrusions 19a, 1.
Since the protruding part 19c is fixed by extending in the opposite direction to 9b, and the protruding part 19c is brought into contact with the foot accelerator pedal 7, the interlocking structure of the operation lever and the pedal is simplified and the interlocking is ensured.

[Brief explanation of drawings]

Fig. 1 is a front view showing the engine control device according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view showing the rotation of the operating lever, and Fig. 4 is a tractor to which the present invention is applied. FIG. DESCRIPTION OF SYMBOLS 1... Tractor, 5... Driver's seat, 6... Operating lever, 7... Foot accelerator pedal, 9... Engine, 10... Clutch housing, 11... Support member (boss), 12... Shaft, 12a ……
Operation lever receiver.

Claims (1)

[Scope of Claim for Utility Model Registration] A tractor 1 comprising an operating lever 6 and a foot accelerator pedal 7 disposed on a driver's seat 5, and controlling a governor 29 of an engine 9 by rotating the operating lever 6 or the foot accelerator pedal 7. , a support member 11 is disposed on the clutch housing 10, and an operating lever receiving portion 12a is further provided on the support member.
and extends horizontally outward from the receiving portion in a uniaxial manner to fix the shaft 12, and the lower end portion of the operating lever 6 is inserted into the operating lever receiving portion 12a to rotate the lever around its axis. A foot accelerator pedal 7, which is connected to the governor 29, is rotatably supported on the shaft 12, and a foot accelerator pedal 7, which is connected to the governor 29, is rotatably supported on the shaft 12. A stopper 19 having protrusions 19a and 19b in two directions is fixed, and the protrusions 19a and 19b of the stopper 19 extending in two directions abut against the support member 11, thereby changing the rotation range of the operating lever 6. The supporting member 1 is attached to the operating lever 6.
1. This engine control device for a tractor is integrally provided with a protruding portion 19c that extends on the opposite side from the foot accelerator pedal 7 and comes into contact with the foot accelerator pedal 7.