JPH0641875Y2 - Pedal-type shift operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a movable member that operates in conjunction with a speed change pedal for a continuously variable transmission, an engaging portion that operates in conjunction with a brake pedal, and a brake. When the lock member is operated to the parking position in a neutral state of the speed change pedal and in a stepped state of the brake pedal, the movable member and the lock member are respectively provided. Engage through the pin and groove provided, the transmission pedal is in the neutral state,
The present invention relates to a pedal type gear shift operation mechanism configured to hold a brake pedal in a depressed state.

[Conventional technology]

As a pedal type gear shifting operation mechanism of this type,
As disclosed in Japanese Patent No. 025, etc., when the lock member is rotated to the parking position while the speed change pedal is in the neutral state and the brake pedal is depressed, the pin of the movable member engages with the groove of the lock member. In addition, there is a configuration in which the claw portion of the lock member is engaged with the engaging portion of the brake pedal to hold the shift pedal in the neutral state and the brake pedal in the depressed state.

In addition, in such a pedal type gear shifting operation mechanism, it is necessary to set the operation limit on the reverse side of the gear shifting pedal.
As disclosed in Japanese Patent No. 3 or the like, the bolts provided on the speed change pedal are brought into contact with the fixing portion on the machine side.

[Problems to be solved by the device]

However, using a bolt to set the operation limit on the reverse side requires a dedicated member such as a bolt, which increases the number of parts and complicates the manufacturing process, which causes a cost increase.

An object of the present invention is to make it possible to easily and inexpensively set an operation limit to the reverse side of a shift pedal by effectively utilizing existing parts.

[Means for Solving the Problems]

A feature of the present invention is that a contact portion is continuously provided in the groove, and a depressing operation of the speed change pedal to the reverse side in a disengaged state of the lock member is performed within a predetermined range by contacting the pin with the contact portion. This is because it is regulated internally, and its actions and effects are as follows.

[Action]

In a state in which the lock member is not operated to the parking position, that is, in a disengaged state in which the pin of the movable member is not engaged in the groove of the lock member, even if the shift pedal is depressed from the neutral state to the reverse side, The pin contacts the contact portion connected to the groove and is regulated within a predetermined range.

[Effect of device]

According to the present invention, (a) existing parts can be utilized and dedicated parts are unnecessary,
The number of parts is reduced accordingly.

(B) The manufacturing is simplified because the shape of the lock member may be slightly changed and the contact portion may be simply connected to the groove.

By reducing the number of these parts and simplifying the production, it becomes possible to easily and inexpensively set the operation limit to the reverse side of the shift pedal.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows a pedal shift operation mechanism of an agricultural tractor according to the present invention. As shown in FIG. 1, a brake pedal (1) and a speed change pedal (2) are axially supported in the front-rear direction, and an engagement member (3) is attached to the brake pedal (1) and a shaft of the speed change pedal (2). A gearshift pedal arm (5), which is an example of a movable member, is fixed to (4). A rear brake device (not shown) is linked to the brake pedal (1), and a hydrostatic stepless transmission is provided through a rod (6) having a turnbuckle structure (6A) and having an adjustable length. (HST)
The operation part (7) of is connected. The forward speed is increased by depressing the shift pedal (7) forward, and the reverse speed is increased by depressing the rearward pedal.

Above the shaft (4), a lock member (8) elastically biased counterclockwise in the figure by a spiral spring (14) is pivotally supported around a horizontal axis (X). . A large number of locking claws (9) are formed on the front lower side of the lock member (8) and a groove (10) is formed on the rear upper side thereof, and the lock member (8) further includes a parking brake lever (9). 11) is attached.

Then, with the speed change pedal (2) in the neutral state and the brake pedal (1) in the depressed state, the parking brake lever (11) is operated forward and downward against the biasing force, and the lock member (8) is moved to the timepiece shown in the figure. When it is rotated around, the lock claw (9) of the lock member (8) engages with the engaging member (3), and the pin (1) attached to the speed change pedal arm (5).
2) engages in the groove (10) of the lock member (8). When the foot is released from the brake pedal (1) in this state, the engaging member (3) is strongly engaged with the lock claw (9) by the pedal returning force,
The restoring swing of the lock member (8) is prevented, the engaged state is maintained, the shift pedal (2) is locked in the neutral state, and the brake pedal (1) is locked in the depressed state.

Further, when the brake pedal (1) is slightly depressed in the parking state, the engagement of the engagement member (3) with the lock claw (9) is released, and the lock member (8) is automatically rotated counterclockwise in the figure. When the brake pedal is released, the brake pedal (1) returns to the position before the pedal is depressed, and the pin (12) escapes from the groove (10) to shift the gear pedal (2).
It is designed to allow the front and rear of the vehicle to be depressed.

Abutment parts (13
b) and (13a) are formed. When the lock member (8) is in the original non-parking position, the pin (12) which is not engaged with the groove (10) is brought into contact with the front abutment portion (13b) so that the shift pedal The stepping operation to the front of (2)
Further, since the pin (12) is brought into contact with the rear contact portion (13a), the backward stepping operation is restricted within a certain range.

As described above, in the pedal gear shift operation mechanism, the contact portions (13b) and (13a) connected to the groove (10) are used effectively to set the limit positions of the gear shift pedal (2) to the forward drive side and the reverse drive side. I am doing it.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a pedal-type gear shift operation mechanism according to the present invention. FIG. 1 is a side view, FIG. 2 is a side view showing a state in which the gear pedal is held in a neutral state, and the brake pedal is depressed. FIG. 3 is a side view of the agricultural tractor. (1) …… Brake pedal, (2) …… Shift pedal,
(3) ... Engagement part, (5) ... Movable member, (8) ... Lock member, (12) ... Pin, (13a) ... Contact part.

Claims (1)

[Scope of utility model registration request] 1. A movable member (5) which operates in conjunction with a speed change pedal (2) for a continuously variable transmission, and a brake pedal (1).
And a lock member (8) for parking which acts on the engaging portion (3) of the brake operation system, the engaging portion (3) being operated in conjunction with When the lock member (8) is operated to the parking position while the pedal (1) is depressed, the movable member (5) and the lock member (8) are moved.
Are engaged with each other through a pin (12) and a groove (10) provided on each, and the transmission pedal (2) is held in a neutral state and the brake pedal (1) is held in a depressed state. A pedal type gear shifting operation mechanism, wherein the groove (1
0) is provided with an abutment portion (13a) in succession, and when the lock pedal (8) is released from the engagement state, the abutment portion (2) of the speed change pedal (2) to the reverse side is depressed. 13a) A pedal-type gear shift operation mechanism which is regulated within a predetermined range by contacting with the gear shift operation mechanism.