JP2521551Y2 - Braking device for compaction machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a braking device in various compacting machines such as a load roller, a vibrating roller, and a tire roller.

[Conventional technology]

Conventionally, hydraulically driven rolling machines such as road rollers are
It is equipped with a drive device that drives the vehicle body by hydraulic pressure, a forward / reverse lever that can move to a neutral position, a forward position, and a reverse position, and a brake pedal that can move to a brake-on position and a brake-off position and that controls the braking device. There is. In this compaction machine, the forward / reverse lever is operated to the forward, neutral, and reverse positions to move the vehicle body to the forward, neutral, and reverse positions. There is no relation between the drive mechanism and the drive mechanism, and they are completely separate.

[Problems to be solved by the present invention]

Therefore, in the related art, when the brake pedal is operated while the vehicle body is running to operate the braking device, a forward or backward drive force is applied to the vehicle body, which makes it impossible for the hydraulic drive device and the braking device. However, there is a problem in that the load is often applied to these devices to cause a failure, and the useful life of the compacting machine is shortened.

The present invention is intended to solve the above problems, and when the braking device is actuated, the forward / reverse lever is always moved to the neutral position to release the forward or reverse drive force, and further, it is guided and moved. (EN) Provided is a braking device for a compaction machine that accurately stops a forward / backward lever at a neutral position.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention includes a drive device for driving a vehicle body, and a forward / reverse lever that is movable to each of forward, neutral, and reverse positions and that controls the drive device in forward, neutral, and reverse states. In a compaction machine equipped with a brake pedal that is movable to each position of brake on and brake off and that controls the braking device to each state of brake on and brake off, the movement of the brake pedal is transmitted to the forward and backward lever. A connecting means, and a guide means for guiding the movement of the forward / backward lever by the brake pedal to the neutral position, wherein the connecting means has an arm whose one end is connected to a shaft rotated by the forward / backward lever. , A sliding path formed in the axial direction of the arm on the other end side of the arm,
One end of the rod is connected to the brake pedal and the other end of the rod is movably connected to the slide path of the arm. The guide means is provided on at least one side of the other end of the rod. It is composed of a mounted moving body and a pair of guide plates installed on both sides of the moving body so as to incline so as to spread upward, and when the brake pedal is moved to the brake-on position, the rod is moved. The other end of the rod is moved by pulling down the moving body along the guide plate to the inter-guide-plate minimum portion,
It is characterized in that the shaft is rotated from the forward position or the reverse position to the neutral position and held by the rotation of the arm due to the movement of the other end of the rod.

[Action]

When the brake pedal is moved to the brake-on position, the braking device is activated, and the forward / backward lever is automatically moved to the neutral position from the previous forward or reverse position through the connecting means. Therefore, the driving force of the hydraulic device for moving the vehicle body forward or backward is released. The guide means guides the forward / backward lever to move to the neutral position and holds it accurately at the neutral position, so that the stop position of the forward / backward lever does not deviate toward the forward position or the reverse position. .

〔Example〕

Hereinafter, this will be specifically described with reference to the drawings showing an embodiment of the present invention.

1 and 2 schematically show a braking device for a compaction machine according to the present invention. In this embodiment, the vibration roller for rolling the surface of the road is used as the rolling machine, but the rolling machine is not limited to this and may be another rolling machine such as a road roller or a tire roller. . This compacting machine is provided with a hydraulic drive device for driving the vehicle body, and this drive device is conventionally known.

A forward / backward lever 1 for controlling the drive device has a lower end fixed to a shaft 2, which is a frame 3 of a vehicle body.
It is rotatably attached to. This forward / backward lever 1
Rotates about the longitudinal axis of the shaft 2 to
As shown in the figure, the neutral position (N) and the forward position (F)
And the reverse position (B), and can move between these positions.

The drive unit includes a hydraulic pump (not shown), which is connected to the shaft 2 via a wire 4. Therefore, the hydraulic pump is operated according to the operation of the forward / backward lever, does not operate in the neutral state when the forward / backward lever 1 is in the neutral position (N), and takes the forward state when the forward / reverse lever 1 is in the forward position (F). It is set so as to be in the reverse drive state when it is in the position (B), but since these are conventionally known, further explanation is omitted.

Below the forward-backward lever 1, a brake pedal 5 for controlling a braking device (not shown) is installed. As shown in FIG. 1, one end of the brake pedal 5 is pivotally attached to the frame 3 by a shaft 6, and a spring 7 stretched between the brake pedal 5 and the frame 3 is provided.
The footrest 5a is urged so that it is always positioned above, and a stopper 8 is provided above it to regulate the upper position. The state where the footrest 5a is located above is the brake off position, and the braking device does not operate.

Further, the brake pedal 5 has an actuating piece 5b protruding near its pivot portion, and the foot pedal 5a of the brake pedal 5 is
When is pressed down, the operating piece 5b is brought into contact with the electric switch 9 for activating the braking device. Therefore, the state where the footrest 5a is pushed down is the brake-on position, and the operating piece 5b comes into contact with the electric switch 9 to turn it on, as shown by the alternate long and short dash line in FIG. Works.

Although the electric switch 9 is described in the illustrated embodiment, this is for the case where the braking device is a negative brake, and in the case of a hydraulic brake, the master cylinder is replaced with this electric switch 9.

It should be noted that with the movement of the brake pedal 5 to the brake-on position, a connecting means for moving the forward / reverse lever 1 from the forward drive position (F) or the reverse drive position (B) to the neutral position (N), and The guide means for guiding the movement of the advancing lever 1 to the neutral position (N) and for holding it at the neutral position (N) is provided.

The connecting means 11 of the illustrated embodiment comprises an arm 12 connected to the shaft 2 and a rod 13 connecting this arm and the brake pedal 5. More specifically, as shown in FIG. 3, one end of the arm 12 has the shaft 2
A slide path extending along the longitudinal direction of the arm, that is, a slot 14 is provided at the other end of the arm, and a fork portion 15 is formed at one end of the rod 13.
The other end of the arm 12 is inserted between the fork portions. The other end of the rod 13 is penetrated by a shaft 16 rotatably attached to the side surface of the brake pedal 5 at a substantially central portion thereof, as shown in FIG. A stopper nut 18 is screwed to the rod 13 on the side opposite to this nut. Therefore, the rod 13 is pulled downward as the brake pedal 5 is pushed down.

The guide means 20 is a fork part in the embodiment shown in FIG.
Two moving bodies, that is, a disk 21 in this embodiment, arranged on both sides of the disk 15, and a pair of guide plates 22 fixed to the frame 3 and expanded and inclined upward on both sides of the disk 21. However, this disk 21 may be one. In the embodiment shown in FIG. 4, one disk 21 is arranged.

Through holes are provided in the disk 21 and the fork portion 15, and a support shaft 23 is inserted through the through holes and the slots 14 of the arm 12. The vehicle body 23 has a head portion 23a at one end and the other end. A nut 24 is screwed into the provided screw part. Therefore, the arm 12, the rod 13 and the disk 21 are rotatably connected together by the support shaft 23, which supports the slot 14 of the arm 12.
A disk that can slide along and is pivotally attached to the support shaft 23.
21 and the fork portion 15 are provided with the arm 12 by the moving distance of the spindle 23.
It is designed to move relative to.

FIG. 5 is an explanatory view of the operation of this device. Now, when the forward / reverse lever 1 is in the forward position (F) and the vehicle body is moving forward, the arm 12, the disk 21, and the fork portion 15 are shown in FIG. It is in the position shown by the solid line. From this state, when the brake pedal 5 is pushed down to the brake-on position and moved, the rod 13 is pulled downward and guided by the guide plate 22 on the right side shown in FIG. Move down along. This movement causes the shaft 2 to rotate, and the forward / backward lever 1 fixed to the shaft 2 rotates about the shaft 2 toward the neutral position (N).

Thus, when the disk 21 moves between the narrow lowermost portions of the pair of guide plates 22, the forward / reverse lever 1 enters the neutral position (N), so that the drive device stops operating and at the same time, the electric switch 9 described above operates. Since the piece 5b abuts and turns it on, the braking device operates. Disk 21 is a pair of guide plates 22
In the state in which it is moved to the lowermost part, both sides thereof are brought into contact with the guide plates 22 and held properly, so that the forward / backward movement lever 1 is accurately and surely held in the neutral position (N), and its stop position is displaced. There is no such thing.

The brake pedal 5 returns to the upper brake-off position by the pulling force of the spring 7 when the foot is released from the footstep 5a at the above-described brake-on position. The rod 13 is also pushed up by this return movement, and the disc 21 and the fork portion 15 move upward as the support shaft 23 slides in the slot 14 of the arm 12, as shown in FIG. In this state, the forward / backward lever 1 is independent of the pulling of the brake pedal 5, and can be moved to the forward drive position (F) or the reverse drive position (B).

Further, when the forward / reverse lever 1 is in the reverse position (B), the arm 12, the disc 21 and the fork portion 15 are located on the opposite side of the forward position (F) (2 in FIG. 5).
(See dotted line). Also in this case, the forward / reverse lever 1 is moved to the neutral position (N) with the movement of the brake pedal 5 to the brake-on position, and the action is the same as that described above.

〔effect〕

As described above, according to the present invention, the forward / reverse lever is connected to the brake pedal, and when the brake pedal is moved to the brake-on position, the forward / reverse lever is automatically moved from the forward or reverse position to the neutral position. Is applied, the driving force of the drive unit is canceled and becomes zero.Therefore, the drive unit and the braking unit are completely free of excessive load, and failure of these units is completely prevented, and the life of the compaction machine is improved. It has the effect of extending the life. Further, according to the braking device of the compacting machine of the present invention, the arm is provided with the sliding path (the slot in the embodiment) so that the pulling force of the rod is not transmitted to the arm but only the rotational force is transmitted. Therefore, it is difficult for an excessive load to be applied to the arm, and the durability of each mechanism portion in the braking device can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an essential part of a braking device for a compaction machine according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a partial sectional front view showing a connecting portion between a shaft and a rod. FIG. 5 is a front view showing another embodiment of this connecting portion, FIG. 5 is an operation explanatory view when the brake pedal is in the brake on position, and FIG. 6 is an operation explanatory view when the brake pedal is in the brake off position. Is. 1 ... Forward / backward lever, 2 ... Shaft, 5 ... Brake pedal, 11 ... Connecting means, 12 ... Arm, 13 ... Rod, 20 ... Guide means, 21 ... Disk, 22 ... Guide plate, 23 ... Spindle.

Claims (1)

(57) [Scope of utility model registration request] 1. A drive device for driving a vehicle body, and forward, neutral,
It is possible to move to each position of reverse, and to drive the drive device forward, neutral,
In a compaction machine equipped with a forward / reverse lever that controls each state of reverse, and a brake pedal that is movable to each position of brake on and brake off and that controls a braking device to each state of brake on and brake off, A connecting means for transmitting the movement of the brake pedal to the forward / backward lever; and a guide means for guiding the movement of the forward / backward lever by the brake pedal to the neutral position, wherein the connecting means is rotated by the forward / backward lever. An arm having one end connected to a shaft, a slide path formed on the other end side of the arm in the axial direction of the arm, one end connected to the brake pedal, and the other end connected to the slide of the arm. A rod connected movably along the moving path, wherein the guide means is attached to at least one side of the other end of the rod. And body, and a pair of guide plates inclined to installed so as to be widened upward on both sides of the moving body, when the brake pedal is moved to the brake-on position,
The other end of the rod is moved by pulling down the movable body along the guide plate to the inter-guide-plate minimum portion via the rod, and the shaft is rotated by the rotation of the arm due to the movement of the other end of the rod. A braking device for a compaction machine, characterized in that it is rotated and held from a forward position or a reverse position to a neutral position.