JPS60185641A - Interlocking operation device for brake and clutch - Google Patents

Abstract

PURPOSE:To make smooth braking and starting attainable, by fitting an end part of a brake rod into a long hole of a clutch operating system pedal with some play, while installing a spring in position between the pedal and the brake rod and thereby letting weak braking force produce in advance of clutch-off motion. CONSTITUTION:When a pedal 2 is stepped on, a clutch wire 13 is pulled up whereby a release lever 21 rocks forward, and clutch release gets starting. On the other hand, a brake rod 25 is also pulled via a tension spring 28 and an operating lever 33 rocks forward too, thus weak braking force works thereon. When the pedal is stepped on further, a front end part 26 of the fitted in a rear end of a long hole 5 so that from this point of time the pedal 2 and the rod 25 are solidly interlocked together. Thus, overlapping with clutch-off operation, gently increasing weak braking force is obtainable via the spring 28 so that sudden braking is avoidable and, what is more, smooth driving is performable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved interlocking operation device in which a brake and a clutch are operated by one pedal.

In riding working machines such as riding lawn mowers, the brake operating system and clutch operating system are connected to one pedal to facilitate brake and flange operations and to reduce the number of operating parts. The brake and clutch are operated in conjunction.

Conventionally, the clutch is disengaged in advance when the pedal is depressed, and then the brakes are applied. In other words, the brake is applied after the clutch is disengaged, so sudden braking is likely to occur. . This is because the braking force increases rapidly with a short stroke from near the final stroke of the pedal.

On the other hand, when the pedal force is released from a stopped state using the pedal brake, the clutch is connected without any braking force, which tends to cause a sudden start.

Therefore, is it possible to try to overlap the clutch disengagement operation and the brake operation? If a simple overlap is used, the clutch disengagement operation must be set in the middle of the brake braking stroke, which has a short stroke, so the pedal stroke will inevitably be reduced. becomes short and difficult to operate.

The present invention has been made in view of the following two circumstances, the first of which is
The aim is to generate a weak braking force by overlapping the clutch PJ operation, prevent sudden braking and sudden starts, achieve smooth braking and starting, and also achieve a long bevel stroke. To provide an interlocking operation device for a brake and a clutch that is easy to operate.

In order to achieve this objective, the present invention forms a long hole in the pedal connected to the clutch operation system, and the end of the brake rod is loosely engaged with the long hole so that the brake operation is delayed from the clutch disengagement operation. In addition to providing a mechanism (a), a spring is tensioned between the pedal (Iiu) and f) the brake iron (u) to bias the brake iron toward the pedal side, and the spring force generates a weak braking force even before the clutch chime is activated. It is characterized by the provision of a mechanism.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a side view of the interlocking operating device according to the present invention, showing a pedal in a non-operating state.

The foot rest part (3) of the pedal (2), which has a substantially bell crank shape and is pivoted (1) on the vehicle body at the corner, faces upward (to the left in the figure), and connects to the operating system ( 4) faces the second part, and a tension spring (11) is tensioned between the lower part of this connecting part (4) and a bracket (10) fixed to the vehicle body behind it, and the spring force The pedal (2) is forced to the illustrated return state. A clutch wire (13) is connected to the intermediate part of the connecting part (4) via a lever (12), and the outer (14a) through which the wire (13) is passed is fixed to the bladder (10). There is.

The other end of the clutch wire (13) is the clutch release L/
/<-(21), and this release lever (
A compression spring (23) is tensioned between the bracket (21) and the bracket (22) fixed on the clutch case (20) in front of it, and the spring force biases the lever (21) to the clutch connected state as shown. A stop bar (24) is provided in front of the lever (21) to protrude from above the case (20). The outer (+4b) is fixed to the bracket (22).

In addition, a turnbuckle (15) is interposed in the middle part of the clutch wire (13), that is, a front wire (13a) has a front part (1G), and a rear part wire (+3b) has a cylindrical part (17).
) is I! J! The axially elongated hole (17) of the cylindrical portion (17)
a) connect the rod (16) through the pin (18);
A compression spring (18) is tensioned between the pin (18) and the end of the cylindrical portion (17) on the Rondo side, and the spring force causes the rod I'' (
1B) is designed so as to be inserted into the illustrated cylindrical portion (17). Here, the spring force of the compression spring (18) is set strong so as to maintain the turnbuckle (15) in the illustrated relationship until the clutch is released.

And +i to the second part of the connection part (4) of the pedal (2).
A long hole (5) is formed in the i+ rearward direction, and a bent portion (26
) and have a game. The rear end of this brake iron (25) is connected to the brake operating lever (31) of the drive wheel, and a torsion spring (33) is stretched over the support 4!1+(32)J- of this operating lever (31). Due to the spring force, the lever (31) is biased to the brake non-operating state as shown in the figure.

[fl + day 1. - 7 r-+ ,,,l:ゝfriぢ) Small Boiga 1ヂ →゛Kijiru, k (27) is fixedly attached, and this bracket 1 (27) and the connecting part (4) are provided.
A tension spring (28) is tensioned between the upper part of the body and the opening (25) is urged toward the pedal (2) side, that is, forwardly by the force of the spring, and the bent part (26) is inserted into the long hole ( Press it against the front end of 5). This tension spring (28) is connected to the torsion spring (3).
3) Set the spring force to be stronger.

The operation of the brake and clutch interlocking operation device using one pedal constructed as described above will now be described.

2 to 4 are action explanatory diagrams, and FIG. 5 is a stroke torque characteristic diagram.

First, when the pedal (2) is not operated, the brake is in operation and the clutch is in a connected state, as shown in FIG. The driving torque transmitted by the clutch at this time is the fifth
This is (a) in the figure. The initial position of the pedal (2) is regulated by a stopper (8).

When the pedal (2) is depressed, the clutch wire (13) is pulled as shown in FIG. 2, the release lever (2) swings forward, and the clutch starts to be released. On the other hand, the brake rod (25) is also pulled through the tension spring (28) and the operating lever (33) also swings forward, but since the brake is provided with play, it is weaker than the state shown in Figure 2. Brake braking force is generated. The driving torque at this time is (b) in FIG. 5, and the brake braking torque is (a).

When the pedal is further depressed, the release lever (21) comes into contact with the stopper (24) as shown in Figure ':fS3, and the clutch is released. The driving torque at this time becomes zero at (C) in FIG. On the other hand, in the stroke process from Fig. 2 to Fig. 3, the braking torque gradually increases and becomes balanced with the driving torque ((b) in Fig. Q55), and the negative JL on the brake side
! In order to overcome the spring force of the tension spring (28), the spring (
28) begins to extend, and the front bent portion (26) of the brake rod (25) moves relatively backward within the elongated hole (5) of the pedal (2). In addition, the condition Fa? The braking torque at
This is (c) in the figure.

In this way, the tension spring (28
) generates a weak braking force, and the braking force gradually increases (straight line (A) in Figure 5, (
b), (c)).

By further depressing the brake, the weak braking force is increased and the front end bent portion (2) of the brake rod (25) is increased.
6) collides with the rear end of the elongated hole (5), and from this point on, the pedal (2) and the rod (25) work in unison, pulling the operating lever (31) strongly and applying normal strong brake control. When power is generated (in FIG. 5), the full stroke state shown in FIG. 4 is reached. The braking torque in this full stroke state is shown in (e) in FIG.

By the way, in the stroke process from Figure 3 to Figure 4,
The compression spring (18) of the turn puncture (15) interposed in the middle part of the clutch wire (13) contracts against the operating load and moves forward in the pin (18) or the elongated hole (17a).
The tensile force applied to the release lever (21) after the clutch is disengaged is absorbed by this lost mechanism.

The maximum stroke position of the pedal (2) is regulated by the stroke and par (9).

As described above, since the spring (28) is provided which overlaps with the clutch disengagement operation and generates a weak braking force, the driving torque changes from (b) to (c) as shown in Fig. 5.
While the braking force decreases to (a), (b), (
(c) and (d), so braking occurs on the vehicle starting from the stroke when the brake braking force and driving force are in equilibrium. increase,
Finally, a strong braking force is applied from (d) to (e).

Therefore, compared to the conventional method in which the braking force increases rapidly from (ii) to (e), it is weaker and increases gradually from (i) to (c) to (d) by overlapping with the clutch disengagement operation. Since braking force can be obtained, sudden braking can be avoided, and the pedal stroke can be long, so smooth braking operation can be easily performed.

On the other hand, even if the pedal force is released from a stopped state using the pedal brake, the clutch can be engaged while the weak braking force remains in effect, which prevents sudden starts and allows for a smooth start.

As is clear from the above description, according to the interlocking operation device for brake and clutch according to the present invention, the pedal and brake rod connecting the clutch operation system are connected to each other by a lost mechanism with an elongated hole, and the brake rod is placed on the pedal side. ＝J Since it is connected via an overlap mechanism using a biasing spring, it is possible to generate a weak braking force by overramping the clutch disengagement operation. Therefore, the vehicle can be braked and started smoothly, and the pedal pedal The i-loaf also has many advantages, such as being easy to operate because it swings for a long time.

[Brief explanation of the drawing]

FIG. 1 is a side view of the interlocking operation device according to the present invention, FIG.
3 and 4 are similar action explanatory diagrams, and FIG. 5 is a pedal stroke-driving and braking torque 4□ characteristic diagram. In the drawing, (2) is the pedal, (5) is the long hole, (13) is the clutch wire, (15) is the turn/hole, (25) is the
) is the brake rod, and (28) is the spring.

Claims (1)

[Claims] In a device in which a brake operating system and a clutch operating system are connected to one pedal to operate the brake and clutch in conjunction, the pedal is provided with a long hole that makes the brake operation more difficult than the clutch disengagement operation. The end of the brake rod is loosely fitted into the elongated hole, and a spring is connected between the brake rod and the spring that urges the brake rod toward the pedal and overlaps with the clutch l, +l operation to generate a weak braking force. An interlocking operation device for a brake and a clutch, characterized in that it is attached to a pedal.