JPH0720461U - Forward / backward tilt adjustment mechanism for speed change pedal - Google Patents

Abstract

(57) [Summary] [Purpose] A speed change pedal pivotally attached to a pedal support shaft is interlocked with a speed change operation shaft of a transmission through an interlocking rod, and the speed change ratio of the speed change is changed by tilting the speed change pedal forward and backward. In the gear shift operation mechanism configured as described above, the forward and backward inclination of the speed change pedal is adjusted according to the height of the driver to facilitate the tilting operation of the pedal and reduce the burden on the ankle. [Structure] The length of the interlocking rod is adjustable so that the forward / backward tilting posture of the transmission pedal can be adjusted at the neutral position of the transmission.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a front and rear tilt adjusting mechanism for a shift pedal.

[0002]

[Prior art]

 Conventionally, in a self-propelled work machine equipped with a transmission such as a hydrostatic drive transmission (HST), a gearshift pedal capable of tilting forward and backward is provided in a driving part, and the pedal is connected to a gearbox of the gearbox via a connecting rod. It is linked to the speed change operation shaft.The driver places the toe on the front end of the speed change pedal and the heel on the rear end, and tilts the speed change pedal forward and backward by bending and stretching the ankle to operate the speed change operation shaft. By changing the gear ratio of the transmission, the traveling speed is configured to move forward, backward, and accelerate or decelerate.

[0003]

[Problems to be solved by the device]

 However, if the forward / backward tilted posture of the operation pedal at the neutral position of the transmission does not match the physique of the driver, for example, if the driver's height is high, the knee is located in front and the pedal is placed on the transmission pedal. The ankle is almost at the right angle of the refraction limit, which makes it difficult to operate the transmission pedal in the backward leaning direction.On the contrary, when the driver's extension is low, it approaches the ankle extension limit, so the forward leaning direction There is a problem that it becomes difficult to operate.

[0004]

[Means for Solving the Problems]

 In the present invention, a gearshift pedal pivotally attached to a pedal support shaft is interlocked with a gearshift operation shaft of a transmission through an interlocking rod, and a gearshift configured to change the gear ratio of the gearshift by tilting the gearshift pedal forward and backward. In the operating mechanism, by adjusting the connecting length of the interlocking rod with the speed change pedal, the forward and backward tilting mechanism of the speed change pedal can be adjusted at the neutral position of the transmission. It will be provided.

[0005]

[Effect of device]

 As described above, the length of the interlocking rod that interlocks the shift operation shaft of the transmission and the shift pedal is adjustable, and the forward / backward tilt posture of the shift pedal at the neutral position of the transmission can be adjusted. When the driver's extension is high, the forward / backward tilted posture of the transmission pedal at the neutral position of the transmission is slightly tilted forward, and conversely, when the driver's extension is low, the forward / backward tilted posture of the transmission pedal is changed. It can be slightly tilted backwards, and the shift pedal can be operated within the natural range of flexion and extension of the ankle.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1A shows a mower equipped with a forward / backward tilt adjusting mechanism for a speed change pedal according to the present invention.

As shown in FIG. 1, the mowing machine A connects the mowing section 2 to a position directly below the traveling section 1 which is capable of self-propelling, via the connecting mechanism 3, and connects the traveling section 1 and the connecting mechanism 3 together. An elevating mechanism 4 is provided between them so that they can be moved up and down between a mowing work position where the mowing section 2 is grounded and a non-working position where the mowing section 2 is raised. Power can be transmitted through the moving part 1, and the grass collecting part 5 is attached to the rear end of the traveling part 1, and the conveying part 6 is provided between the grass collecting part 5 and the above-mentioned mowing part 2 to mow the grass. The grass cut by the section 2 is conveyed to the grass collecting section 5 by the conveying section 6 so that the grass can be collected in the grass collecting section 5.

As shown in FIG. 1, the traveling unit 1 is provided with a prime mover unit 11 on a front part of a vehicle body frame 10, an operating unit 12 on an intermediate part, and a fuel tank 13 and a battery 14 on a rear part. The left and right front wheels 15, 15 are attached to the front part of the body frame 10, while the left and right rear wheels 16, 16 are attached to the rear part via the rear axle case 17.

As shown in FIG. 1, the prime mover section 11 is composed of an engine 20, a radiator 21, an air cleaner 22 and the like, which are covered by a bonnet 23 so that they can be opened and closed. A hydrostatic transmission (HST) 24, which is interlockingly connected to the front part of the axle case 17, is interlockingly connected via a drive shaft 25, while the mowing section 2 is interlockingly connected via a transmission mechanism 26.

As shown in FIG. 1, the operating unit 12 has a handle column 27 immediately behind the air cleaner 22 of the engine unit 11, which is erected from the body frame 10 to a position rearward and upward. A handle 28 is attached to the upper end, and a seat 29 is mounted immediately above the fuel tank 13 immediately above the fuel tank 13 via a seat support frame 30. Reference numeral 31 is a speed change pedal, 32 is a brake pedal, 33 is a speed change lever, 34 is a mowing section elevating lever, and 35 is a grass collecting section opening / closing lever.

The left and right sides and the rear of the handle column 27 are covered with the handle column cover 40, and the left and right sides and the rear of the lower end of the handle column cover 40 are covered with the vehicle body cover body 41.

The mowing section 2 arranges a mowing blade 46 in a box-shaped mowing section case 45 having an opening at the lower end, and the grass cutting blade 46 is rotated by the power from the transmission mechanism 26 to remove the grass. I try to reap. Reference numeral 78 is a front gauge wheel, and 79 is a rear gauge wheel.

The transport unit 6 connects the transporting lower case 130 to the right side of the mowing unit case 45, and collects the grass through the duct pipe 134 by the rotation of the lower in the transporting lower case 130. The cut grass is conveyed to the section 5.

In such a mower A, a gear shift operation mechanism 93 is provided for continuously shifting the gear ratio of the HST 24 by operating the gear shift pedal 31 to shift the traveling speed.

As shown in FIG. 2, the gear shift operation mechanism 93 includes a pedal support shaft 94 provided on the vehicle body frame 10 on the right side of the driving unit 12, and the pedal support shaft 94 is provided with the speed change pedal 31 and the boss portion 95. The gear shift operation arm 96 is projected downward on the boss portion 95, and the front end portion of the interlocking rod 97 is connected to the lower end portion of the gear shift operation arm 96 via the connecting pin 97a. In addition to the connection, a speed change lever body 98 is attached to the speed change operation shaft 24a of the HST 24, and the rear end of the interlocking rod 97 is connected to the lower end of the downward extension portion 98a of the speed change lever body 98 via a connection pin 97b. .

The transmission pedal 31 has a front end 31a extending obliquely forward and upward from the boss portion 95, and a rear end 31b extending substantially horizontally rearward, as shown in FIGS. 3 and 4. , The driver places the toes of the toes on the front end of the speed change pedal 31 at 31a and the heel of the speed change pedal 31 at the rear end 31b. The forward / backward rocking operation is transmitted to the HST24 via the gear shift operation arm 96 → the interlocking rod 97 → the gear shift lever body 98 → the gear shift operation shaft 24a, and causes the HST24 to perform the gear shift operation (forward, reverse, acceleration / deceleration). .

In the figure, reference numeral 105 denotes a neutral restoring mechanism for restoring the speed change lever body 98 to the neutral position. When the operation force of the mechanism 105 is not applied to the speed change pedal 31, the HST 24 and the speed change gear are changed. It is possible to hold the pedal 31 and the neutral position.

A stay 99 is provided on the vehicle body frame 10 located immediately after the gear shift operation shaft 24a of the HST 24, and the lower end 33a of the gear shift lever 33 is attached to the stay 99 via the lever support 100 and the support shaft 109. The upper extension 98b of the speed change lever body 98 is formed to extend toward the lower end 33a of the speed change lever 33, and the upper end of the upper extension 98b is connected to the speed change lever 33. The lower end portion 33b is abutted from the front.

In this way, by rotating the shift lever 33 forward, the HST 24 can be accelerated and decelerated only through the shift lever body 98 and the shift operation shaft 24a toward the forward side. .

Further, as shown in FIG. 2, on the right side of the vehicle body frame 10, the base of the brake pedal 32 is pivotally supported on the pedal support shaft 101 via the boss portion 102, and the brake operation is performed on the boss portion 102. The lower end of the arm 103 is attached, the front end 104a of the interlocking rod 104 is connected to the upper end of the brake actuating arm 103, the rear end 104b of the interlocking rod 104 is connected to a brake device (not shown), and the boss portion is formed. The upper end of the interlocking arm 106 is attached to the 102, and the front end 107a of the interlocking rod 107 is connected to the lower end of the interlocking arm 106, while the one-way interlocking body 108 is coaxially attached to the support shaft 109 of the lever support 100 on the stay 99. The rear end 107b of the interlocking rod 107 is connected to the lower end of the one-way interlocking body 108 that is attached.

Moreover, the one-way interlocking body 108 is configured to integrally rotate the lever support body 100 by the frictional force only when the one-way interlocking body 108 is rotated in the brake braking rotation direction. When rotated in the opposite direction, the cam mechanism releases the pressure, and only the one-way interlocking body 108 rotates.

Therefore, when the brake pedal 32 is depressed, the same operation can be transmitted to the brake device via the brake actuating arm 10 3 → interlocking rod 104 to cause the brake operation. At the same time, the gear shift lever 33 can be automatically restored to the neutral position via the interlocking arm 106, the interlocking rod 107, the one-way interlocking body 108, and the lever support 100.

In FIG. 2, 112 is a brake restoring spring, 113 is a stopper body, 114 is a parking brake lever, 115 is an engaging piece, and 117 is a restoring spring.

With the above configuration, when the gear shift lever 33 is operated to an arbitrary position, the gear shift lever 33 is temporarily fixed to that position by the frictional force, and the traveling speed at the operated position is maintained. Cruising can be performed, and by depressing the brake pedal 32, the speed change lever 33 is restored to the neutral position, whereby the cruising state can be automatically released.

In the present invention, as shown in FIGS. 3 and 4, in the speed change operation mechanism 93, the front and rear tilt of the speed change pedal 31 in the neutral position is attached to the front end of the interlocking rod 97 connected to the lower end of the speed changing operation arm 96. An adjusting mechanism m is provided.

As shown in FIGS. 3 and 4, the forward / backward tilt adjusting mechanism m of the speed change pedal 31 has a connecting hole 96a formed at the lower end of the speed change operating arm 96, and a plurality of connecting holes 97 at the front end of the interlocking rod 97. By forming the connecting pins 97c in common with the connecting hole 96a at the lower end of the speed change operation arm 96 and one of the connecting holes 97d, 97e ... at the front end of the interlocking rod 97. The connecting hole 96a at the lower end of the speed change operation arm is connected to the interlocking rod front end 97a.

With the above configuration, the effective length of the interlocking rod 97 can be changed by changing the insertion position of the interlocking rod 97 on the front end side of the interlocking rod 97a to any of the plurality of connecting holes 97c, 97d. Therefore, it is possible to adjust the forward / backward inclined posture of the speed change pedal 31 at the neutral position of the HST 24.

As described above, since the forward / backward tilting posture of the speed change pedal 31 can be adjusted at the neutral position of the HST 24, when the driver is tall, as shown in FIG. The effective length of the gearshift pedal 31 in the neutral position is tilted forward, and when the height is short, the effective length of the interlocking rod 97 is extended to increase the effective length in the neutral position as shown in FIG. By tilting the attitude of the speed change pedal 31 backward, the driver can perform the speed change operation of the speed change pedal 31 in a natural attitude without forcibly bending and stretching the ankle, and reduce the ankle load and fatigue. You can

[Brief description of drawings]

FIG. 1 is a side view of a mower equipped with a forward / backward tilt adjusting mechanism for a transmission pedal according to the present invention.

FIG. 2 is a side view for explaining a shift operation mechanism.

FIG. 3 is an explanatory side view of a forward / backward tilt adjusting mechanism of a shift pedal.

FIG. 4 is an explanatory side view of a forward / backward tilt adjusting mechanism of a speed change pedal.

[Explanation of symbols]

 24 Gearbox 24a Gearshift operation shaft 31 Gearshift pedal 94 Pedal support shaft 97 Interlocking rod

Claims (1)

[Scope of utility model registration request] 1. A transmission pedal (3) pivotally mounted on a pedal support shaft (94).
1) via the interlocking rod (97) to the gearshift operation shaft of the transmission (24).
(24a) interlockingly connected to the gearshift pedal (31) of the interlocking rod (97) in the gearshift operating mechanism configured to change the gear ratio of the transmission (24) by tilting the gearshift pedal (31) forward and backward. A forward / backward tilt adjusting mechanism for a speed change pedal, wherein the forward / backward tilting attitude of the speed change pedal (31) at a neutral position of the speed changer (24) can be adjusted by adjusting a connection length.