JP7151693B2 - work vehicle - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator lever for setting the number of revolutions of an engine in a work vehicle used for agricultural work or civil engineering work.

As described in Patent Document 1, the work vehicle is configured so that the rotation speed of the engine can be controlled by a rotation setting tool such as an accelerator pedal and an accelerator lever. The work is performed in a state in which the number of rotations is set to a predetermined number of revolutions.

JP 2015-101301 A

When starting work while driving the work equipment with a work vehicle, the rotation of the engine is set to a high output rotation speed with a rotation setting tool such as an accelerator lever, and the work vehicle is driven while driving the work equipment. There is little need to maintain high output speed all the time, and there are cases where work can be done even at low output speed.

The present invention sets the engine speed to an optimum speed with a simple operation in a work vehicle in which work is performed by setting the engine speed with an accelerator lever, and when high output speed is required, An object of the present invention is to increase the output without erroneous operation.

The above problems of the present invention are solved by the following technical means.

A first aspect of the present invention is a work vehicle in which work is continued by setting the number of rotations of an engine (11) to a number of rotations suitable for work by turning an accelerator lever (100) in a speed-increasing direction,
An accelerator lever shaft (100a) of the accelerator lever (100) is inserted through a shaft slide portion (104a) of a rotating bracket (104) pivotally supported on the lever bracket (101),
A guide pin (100b) projecting from the accelerator lever shaft (100a) is engaged with a guide groove (102) of a guide plate (101b) provided on the lever bracket (101) to control the movement of the accelerator lever (100). regulate the
When the accelerator lever (100) is rotated in the acceleration direction, the rotation is temporarily restricted at the first rotation stop position (S1) of the guide groove (102), and the output of the engine (11) is used for work. With a suitable work output rotation, by sliding the accelerator lever (100) along the shaft slide portion (104a) from the first rotation stop position (S1), the regulation is released and the speed is further increased. This work vehicle is characterized in that the engine output can be set to the maximum by rotating to the maximum rotation position (S2).
In the second aspect of the present invention, the accelerator lever shaft (100a) is pulled and biased by a compression spring (106) to the shaft slide portion (104a), and the accelerator lever shaft (100a) is supported by the compression spring (106). 106) is withdrawn, and the rotation bracket (104) is further rotated in the acceleration direction to shift the engine speed to the maximum output.
A first invention related to the present invention is a work vehicle in which the number of revolutions of an engine 11 is set to a number of revolutions suitable for work by turning an accelerator lever 100 in a speed increasing direction to continue work. At the first rotation stop position S1 of 100, the output of the engine 11 is set to work output rotation suitable for work, and at the first rotation stop position S1, the accelerator lever 100 is unlocked and further rotated in the acceleration direction. The work vehicle is characterized in that the engine output can be set to the maximum by setting it to the maximum rotation position S2.

A second invention related to the present invention is that the accelerator lever shaft 100a is slid at the first rotation stop position S1 of the accelerator lever 100 to release the lock and rotate in the acceleration direction, thereby increasing the engine 11 to the maximum output. A work vehicle according to a first invention related to the present invention is characterized by being capable of changing speed.

A third aspect of the invention related to the present invention is that the accelerator lever shaft 100a is pulled and biased by a compression spring 106 to the shaft slide portion 104a of the rotary bracket 104 pivotally supported on the lever bracket 101, and the accelerator lever shaft 100a is axially supported. is pulled out against the compression spring 106 and the rotary bracket 104 is further rotated in the acceleration direction to shift the engine speed to the maximum output . and

A fourth invention related to the present invention relates to the present invention in which a guide pin 100b provided on an accelerator lever shaft 100a is engaged with a guide groove 102 of a guide plate 101b provided on a lever bracket 101 to regulate the movement of the accelerator lever 100. A work vehicle according to a third invention .

In the present invention, when the accelerator lever 100 is rotated to the first rotation stop position S1 and work is started, the engine 11 rotates appropriately for the work and normal work can be performed without hindrance, and the work load is large and high output is required. In this case, it can be overcome by unlocking the accelerator lever 100, rotating it further in the speed increasing direction, and maximizing the engine rotation at the maximum rotation position S2. Work can be continued in response to an increase in workload.
In the first invention related to the present invention, when the accelerator lever 100 is rotated to the first rotation stop position S1 and work is started, the engine 11 rotates appropriately for the work and normal work can be performed without hindrance, and the work load is reduced. When the acceleration is large and high output is required, the accelerator lever 100 can be unlocked and further rotated in the acceleration direction to maximize the engine rotation at the maximum rotation position S2. During work, fuel consumption can be suppressed and work can be continued in response to an increase in work load.

In the second invention related to the present invention, in addition to the effect of the first invention related to the present invention, when the accelerator lever shaft 100a is slid in the axial direction at the first rotation stop position S1 of the accelerator lever 100, the increase Since the rotation in the speed direction is possible and the output of the engine 11 is changed to the maximum output, there is no needless consumption of fuel by setting the engine to the maximum output by an unconscious operation.

In the third invention related to the present invention, in addition to the effects of the second invention related to the present invention , the accelerator lever 100 is moved to the first rotation stop position S1 against the compression spring 106 so that the accelerator lever shaft 100a is rotated. Since the lock is released by pulling it out, the structure is simple.

In the fourth invention related to the present invention, in addition to the effects of the third invention related to the present invention, the engine rotation speed change operation of the accelerator lever 100 is regulated by the guide pin 100b and the guide groove 102 of the guide plate 101b. With a simple configuration, operation can be performed without error.

1 is a side view of a riding lawn mower according to an embodiment of the present invention; FIG. 1 is a left oblique rear perspective view of a riding lawnmower from which a collector is removed according to an embodiment of the present invention; FIG. FIG. 3 is a right oblique rear perspective view of the riding lawnmower of FIG. 2 with a bumper removed; 1 is a rear view of a riding lawn mower according to an embodiment of the present invention; FIG. 1 is a perspective view of an accelerator lever according to an embodiment of the invention; FIG. It is a side view of an accelerator lever of an embodiment in the present invention.

EMBODIMENT OF THE INVENTION Below, embodiment which concerns on this invention is described in detail based on drawing.

An embodiment of a riding lawn mower will be described as a work vehicle.

Front wheels 2, 2 and rear wheels 3, 3 are provided on the left and right sides of the front and rear parts of a vehicle body (running vehicle body) 1, respectively. A mower 5 for mowing grass is provided, and constitutes a so-called front mower. A steering column 7 is erected on a floor 6 above the front portion of the vehicle body 1, and a handle 8 for steering is provided on the upper portion of the steering column 7. As shown in FIG. A cockpit 9 is provided behind the steering wheel 8 .

More specifically, the frame structure of the vehicle body 1 is as follows: a floor frame 10 that supports the floor 6, the cockpit 9, etc. from the front side; A transmission case 12 housing a transmission system, a safety guard frame 13 fixed to the top of the transmission case 12, a pair of left and right side frames 14L, 14R connected to the lower end of the transmission case 12 and supporting the engine 11, etc. consists of

The floor frame 10 has a front side U-shaped in a plan view, and supports the steering column 7 at the front, and supports the operator's seat 9 and operation boxes such as various levers at the rear. The ends are connected to the left and right side surfaces 13L and 13R of the safety guard frame 13 in an overlapping state. The left and right struts 15L, 15R of the safety guard 15 are connected to the left and right side surfaces 13L, 13R of the safety guard frame 13, and the upper ends of the left and right struts 15L, 15R are connected to the head frame 15H. L-shaped case connecting portions 13aL and 13aR are provided on the lower left and right sides of the safety guard frame 13, respectively, and are fixedly connected to the upper and rear surfaces of the transmission case 12 to form a strong rigid structure. .

The transmission case 12 is a part of the frame structure of the vehicle body 1 as described above, and the left and right ends of the transmission case 12 are internally provided with endless belts for transmission to the front wheels 2 and gears. The traveling transmission cases 12aL and 12aR are mounted so as to be capable of transmission.

Left and right side frames 14L and 14R are connected and fixed to the lower portion of the transmission case 12. As shown in FIG. The side frames 14L and 14R extend rearward, and swash plates 14E and 14E for mounting the engine are formed in the front and rear halfway portions thereof so that the engine 11 can be supported in a vibration-isolating manner. A rear axle case 16 is provided above the rear ends of the side frames 14L and 14R. Inside the rear axle case 16, a rear wheel differential mechanism, left and right axles, a reduction gear mechanism, and the like are installed. The respective rear ends of the side frames 14L and 14R are connected and fixed by a left and right connecting member 14S.

An upper frame 17 is formed at a position slightly higher than the height of the engine 11. The upper frame 17 is formed in a U shape in plan view, with the curved portion at the rear and the left and right front ends connected to adjacent frames. More specifically, the front end portion is connected and fixed to a horizontal frame 19 that connects a pair of left and right vertical frames 18L and 18R that are fixed to the safety guard frame 13 at the lower end and stand vertically.

Next, the configuration of the rear part of the frame structure of the vehicle body 1 will be described. Between the rear ends of the left and right side frames 14L, 14R and the upper frame 17, two vertical struts 20L, 20R which also serve as reinforcement are provided. An appropriate number of horizontal beams 20H and 20H are fixed between the vertical struts 20L and 20R to provide ladder-like reinforcement.

A rear pan bar 21 is provided on a horizontal beam 20H arranged at a position slightly higher than the vertical center of the vertical struts 20L, 20R.

As shown in FIG. 1, behind the safety guard 15 and above the upper frame 17, a collector 32 for storing cut grass is provided via an elevating mechanism. The elevating mechanism has a parallel link elevating arm 33 and an elevating cylinder mechanism 34, one end of which is attached to the safety guard frames 13L and 13R for supporting the safety guard 15, and the other end of which is a collector frame on which the collector 32 can be placed. 35 is connected. The grass clipped by the mower 5 is received in the collector 32 via a bellows hose 36 and a duct 37 under the blowing action of a blower (not shown). The duct 37 faces the receiving port of the collector 32, and the outlet of the duct 37 and the receiving port of the collector 32 are matched when the collector 32 is lowered so as not to interfere with the up-and-down operation of the collector 32, and the duct 37 can be easily separated from the receiving port of the collector 32 when the duct 37 is raised. Configure.

An engine cover 40 is arranged on the side surface of the vehicle body 1 to cover the side surface of the engine 11 , and a rear cover 41 is provided on the rear side of the vehicle body 1 so as to cover the area above the central sheet metal member 22 of the rear bumper 21 . Due to the presence of the rear cover 41, grass clippings dropped downward from the collector 32 can slide down the surface of the rear cover 41 and drop to the rear of the vehicle body 1.例文帳に追加A battery case 42 for housing a battery is arranged on the left side of the vehicle body 1, and a radiator 43 is arranged on the right side of the vehicle body 1.例文帳に追加

Next, the steps and gripping structure for assisting the ascending/descending to the floor 6 will be described. The mower 5 is located below the floor 6, and the mower deck 5a covering the cutting blade 4 of the mower 5 overlaps the floor 6 at its central side and the floor 6 at the left and right end sides of the mower deck 5a in plan view. protrudes outside the projection plane of A step 45 is fixedly provided on the upper surface of the mower deck 5a. That is, the step 45 is formed by forming a band plate into an L shape when viewed from the side, and forming anti-slip holes 45b, 45b, . . . end) is fixed by a mounting member 46 with the tread surface 45a as the upper surface. By mounting with the mounting member 46, the step 45 is arranged outside the base side bracket 49L of the support arm 48L of the left front gauge wheel 47L of the left and right front gauge wheels 47L, 47R of the mower 5. As shown in FIG. It should be noted that the position of the step 45 is arranged outside the projection range of the floor frame 10 and the floor 6 in plan view. When ascending/descending to the floor 6, the step 45 is stepped on with the left foot or the right foot to perform the ascending/descending operation in two steps.

In the illustrated example, the step 45 is provided at the left end of the mower deck 5a, but it may be provided at the right end or at both ends.

Regarding the configuration of the upper surface of the floor 6, left and right operation boxes 50L and 50R are provided on the left and right sides of the cockpit 9 to support various operation levers and the like. Three hydraulic control levers 51, 52, and 53 are arranged in the right operation box 50R, and all of them are configured to swing back and forth. A hydraulic operation lever 51 is provided at the front position, and a hydraulic operation lever 52 as a collector elevation hydraulic operation lever for raising and lowering the collector 32 and a hydraulic operation lever 52 for opening the rear collector lid 32a while tilting the collector 32 backward. An operation lever 53 is provided side by side at the rear position. All of these hydraulic operating levers 51, 52, and 53 are configured to interlock the spools of the hydraulic valves.

An accelerator lever 100 for setting the rotation speed of the engine 11 is provided on the right operation box 50R.

As shown in FIGS. 5 and 6, the accelerator lever 100 has a sensor 105 attached to a sensor plate 101c of a lever bracket 101 attached in the right operation box 50R, and a rotating bracket 104 pivotally supported by a shaft 103 on a lever support plate 101a. The accelerator lever shaft 100a of the accelerator lever 100 is inserted through the shaft slide portion 104a of the rotary bracket 104, and the compression spring 106 and the ring 107 pull the accelerator lever 100 and bias it.

When the arm portion 104b of the rotary bracket 104 is extended toward the sensor 105 and engaged with the sensor arm 105a of the sensor 105, and the tip of the accelerator lever 100 is rotated downward, the rotary bracket 104 rotates the sensor arm 105a of the sensor 105. Then, the sensor 105 outputs a signal for increasing the rotation of the engine 11 .

Further, since the guide pin 100b projecting from the accelerator lever shaft 100a of the accelerator lever 100 is engaged with the Z-shaped guide groove 102 of the guide plate 101b, when the accelerator lever 100 is rotated, the first rotation stop position is reached. At S1, the rotation of the accelerator lever 100 is temporarily stopped, and the rotation speed of the engine 11 is set to the working rotation speed. In order to further increase the rotation of the engine 11 to the maximum rotation speed, the accelerator lever 100 is pulled up and the tip thereof is rotated downward to bring the guide pin 100b to the maximum rotation position S2.

When the tip of the accelerator lever 100 is rotated upward, the guide pin 100b passes through the guide groove 102 and returns to its original position without resistance, so that the rotation of the engine 11 becomes idling rotation.

Regarding the structure around the steering column 7, a front bumper 61 made of a pipe material is provided on a support member 60 erected from the front end of the floor frame 10. As shown in FIG. The front bumper 61 has a shape in which the left and right intermediate portions are bent downward and the left and right end portions are bent rearward, so that the front bumper 61 surrounds the upper front and sides of the steering column 7 . The support member 60 is integrated by welding to connect the upper ends of the pair of left and right curved standing plates 60a, 60a, and the U-shaped connecting portions 60b, 60b at the lower ends of the curved standing plates 60a, 60a are connected to the front end of the floor frame 10. They are fitted from the side and fixed with bolts. The left and right end portions of the front bumper 61 are bent rearward to form grip portions 61a.

The front bumper 61 can be used as a supporting member for supporting the headlights 62L and 62R.

S1 first rotation stop position S2 maximum rotation position 11 engine 100 accelerator lever 100a accelerator lever shaft 100b guide pin 101 lever bracket 101b guide plate 102 guide groove 104 rotation bracket 104a shaft slide portion 106 compression spring

Claims (2)

A work vehicle in which work is continued by setting the number of revolutions of an engine (11) to a number of revolutions suitable for work by turning an accelerator lever (100) in a speed-increasing direction,
An accelerator lever shaft (100a) of the accelerator lever (100) is inserted through a shaft slide portion (104a) of a rotating bracket (104) pivotally supported on the lever bracket (101),
A guide pin (100b) projecting from the accelerator lever shaft (100a) is engaged with a guide groove (102) of a guide plate (101b) provided on the lever bracket (101) to control the movement of the accelerator lever (100). regulate the
When the accelerator lever (100) is rotated in the acceleration direction, the rotation is temporarily restricted at the first rotation stop position (S1) of the guide groove (102), and the output of the engine (11) is used for work. With a suitable work output rotation, by sliding the accelerator lever (100) along the shaft slide portion (104a) from the first rotation stop position (S1) , the regulation is released and the speed is further increased. A work vehicle characterized by being able to set the engine output to the maximum by rotating to the maximum rotation position (S2). The accelerator lever shaft (100a) is pulled in and biased by a compression spring (106) to the shaft slide portion (104a), and the accelerator lever shaft (100a) is supported against the compression spring (106). 2. The working vehicle according to claim 1 , wherein the rotation bracket (104) is pulled out and further rotated in a speed increasing direction to shift the engine speed to the maximum output.

Images