JPH07280051A - Braking device of working machine - Google Patents

Abstract

PURPOSE:To surely stop a working machine in an interlocking manner with the stopping action of the power from a driving pulley to a driven pulley by providing an interlocking pin to turn a brake arm interlocking to the turning action of the tension arm in a positionally adjustable manner on the tension arm or the brake arm side. CONSTITUTION:When the fraction of a tension operating arm 16b is released by operating an operation lever to turn the operation arm 16b, the transmission is disconnected from a driving pulley 8 to a driven pulley 11. An interlocking pin 25 is also turned simultaneously with the tension arm 16, the pressing force against a brake operation arm 15b is released, the operation arm 15b is turned clockwise by a brake spring 23, and the brake arm 15 is turned in the same direction to be pressed against the circumferential surface of a driven pulley 11. Thus, the driven pulley 11, a snow-collecting auger and a blower are instantaneously stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for working machines such as snowplows. More specifically, the present invention relates to a braking device that transmits power from a prime mover such as an engine to a working machine via a clutch and stops inertial rotation of the working machine when the clutch is disengaged.

[0002]

2. Description of the Related Art Conventionally, a belt is transmitted from a driving pulley on the side of a prime mover such as an engine to a driven pulley on the side of a working machine, and a tension pulley is separated from or pressed against the belt, so that power from the driving pulley to the driven pulley is transmitted. It is known that intermittent operation is performed and a braking brake of a work machine such as a snow removing device is operated in a braking or non-braking state in synchronism with the intermittent operation of power by the tension pulley (for example, Japanese Utility Model 5). -38111, JP-A-4-2764
No. 7, etc.).

[0003]

However, the above-described conventional braking device has a structure in which the brake lining belt is brought into pressure contact with the peripheral surface of the pulley or the brake arm is brought into pressure contact with the side surface, and the brake lining belt is used. Has a problem that it gradually extends and the braking force decreases,
Further, there is a problem in that a brake arm which is brought into pressure contact with a side face does not always provide a sufficient braking force. Moreover, since adjustment of the above-mentioned interlocking relation is impossible or very difficult in the conventional one, it takes time to set the initial state, and further, when the transmission belt is loosened with time or the brake lining is worn, There were some inconveniences such as not being able to easily adjust the interlocking relationship.

The present invention has been proposed in view of the above problems, and surely stops a work machine such as a snow removing device in conjunction with the above-described power cutoff operation from the drive pulley to the driven pulley. (EN) Provided is a braking device for a working machine that can easily adjust the interlocking relationship and reliably perform the interlocking operation even when the transmission belt is loosened or the brake lining is worn. The purpose is to

[0005]

In order to achieve the above object, the braking device for a working machine according to the present invention has the following structure. That is, a belt is transmitted from a drive pulley on the prime mover side of an engine or the like to a driven pulley on the working machine side, and a tension pulley is separated from or in pressure contact with the belt to interrupt the power from the drive pulley to the driven pulley,
In a braking device for a working machine in which a working machine braking brake is operated in a braking or non-braking state in conjunction with an intermittent operation of power by the tension pulley, a tension arm supporting the tension pulley and the driven pulley or the same. The interlocking pin that pivots independently the brake arm that is press-contacted to the peripheral surface of the integrally formed brake drum, and that pivots the brake arm in conjunction with the pivot arm movement is described above. It is characterized in that it is provided on the side of the tension arm or the brake arm so that its position can be adjusted.

[0006]

As described above, since the brake arm is brought into pressure contact with the peripheral surface of the driven pulley or the brake drum provided integrally with the driven pulley, a sufficient braking force can be secured and the tension pulley can be The tension arm and the brake arm that support each are independently rotatably supported, and the interlocking pin that rotates the brake arm in conjunction with the rotation operation of the tension arm is provided on the tension arm or the brake arm so that the position can be adjusted. As a result, even if the transmission belt is loosened or the brake lining is worn, the position of the interlocking pin can be adjusted to reliably execute the interlocking operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A braking device according to the present invention will be specifically described below with reference to an embodiment shown in the drawings.

FIG. 1 is a side view showing a schematic structure of a snow remover to which a braking device according to the present invention is applied, FIG. 2 is a rear view of a main part, and FIG. 3 is a side view thereof. The embodiment shown in the drawing is applied to a self-propelled snow remover, in which an engine 2 as a prime mover is mounted on the upper part of the machine body 1, and a transmission mechanism omitted by the engine 2 on the lower part of the machine body 1 There is provided a crawler 3 which is rotatably driven via.

A snow removing device 7 as a working machine including a snow collecting auger 4, a blower 5, a snow throw chute 6 and the like is arranged at the front of the machine body 1, and the power from the engine 2 is output from the output shaft thereof. 2a to the driven pulley 11 on the blower shaft 10 via the transmission belt 9 and the blower shaft 1
It is configured such that the blower 5 on the blower shaft 10 and the snow collecting auger 4 on the auger shaft 13 are rotationally driven at a predetermined speed by transmitting from 0 to the auger shaft 13 via the auger mission 12.

Next to the transmission belt 9, as shown in FIGS. 2 and 3, a tension pulley 14 for contacting and separating from the belt 9 for transmitting and blocking power from the drive pulley 8 to the driven pulley 11 is provided. That tension pulley 1
The snow removal device 7 is interlocked with the power cutoff operation by the No. 4
And a brake arm 15 for stopping the snow collecting auger 4 and the blower 5. The brake arm 1
In the present embodiment, the reference numeral 5 is a structure in which the peripheral surface of the driven pulley 11 is directly brought into pressure contact with the brake arm 15. The contact surface of the brake arm 15 with the driven pulley 11 is provided with a brake lining, but it is omitted in the drawing. did. The tension pulley 14 is rotatably supported by a tension arm 16.

In the present embodiment, the tension arm 16 and the brake arm 15 are independently rotatably supported by a common support shaft 19 attached to the machine body frame 17 via a bracket 18, and each of the above-mentioned respective Arm 15
The cylinders 15a and 16a, which are rotatably fitted to the support shaft 19, are integrally fixed to the base of 16 by welding or the like, and the brake operation arm 15b and the tension operation arm are respectively attached to the cylinders 15a and 16a. 16b is integrally provided by welding or the like. 19a is the above-mentioned both cylinders 15a and 16
It is a color interposed between a.

One end of an operation wire 21 is connected to the tension operation arm 16b via a buffer spring 21a, and the other end of the wire 21 is connected to an operation lever 22 arranged at the upper rear portion of the machine body 1. There is. Further, a brake spring 23 is provided between the brake operation arm 16b and the support arm 20 attached to the bracket 18 so as to urge the brake arm 15 to rotate in a direction in which the brake arm 15 is constantly pressed against the peripheral surface of the driven pulley 11. ing. 24 is the brake spring 2
It is an adjusting bolt for adjusting the tension of No. 3.

Further, the illustrated example shows the tension arm 16 described above.
Further, an interlocking pin 25 for pivoting the brake operating arm 15b in association with the pivotal movement of the arm 16 is provided, and the interlocking pin 25 is integrally formed with the screw 2
5a is inserted into the long hole 26 formed in the tension arm 16, and the nut 27 is screwed in to be tightened and fixed, and can be fixed at any position within the range of the long hole 26.

In the above structure, the tension pulley 14 is separated from the transmission belt 9 as shown in FIG.
In a state in which the transmission from the drive pulley 8 to the driven pulley is cut off, the brake arm 15 is pressed against the peripheral surface of the driven pulley 11 by the brake spring 23 and the snow collecting auger of the driven pulley 11 and the snow removing device is stopped. 4 and blower 5
Is in a stopped state. At that time, the interlocking pin 25 is slightly separated from the brake operating arm 15b.

In this state, when the operation lever 22 is operated to rotate the tension operation arm 16b through the wire 21 in the counterclockwise direction in FIG. 2, the tension arm 16 also rotates in the same direction as shown in FIG. Tension pulley 1 as shown
4 is pressed against the transmission belt 9 and the belt becomes in a tension state,
The power of the drive pulley 8 is transmitted to the driven pulley 11, and the snow collecting auger 4 and the blower 5 are rotated. At this time, the interlocking pin 25 also rotates simultaneously with the rotation of the tension arm 16, contacts the brake operating arm 15b, and the operating arm 15b rotates in the same direction as the above against the brake spring 23. The brake arm 15 integrally fixed to the driven pulley 1 via the cylindrical body 15a and 15b.
The brake is released from the circumferential surface of No. 1 and the brake is released.

Further, when the operation lever 22 is operated from the above state to release the pulling of the tension operation arm 16b and the operation arm 16b is rotated clockwise from the state of FIG. 4, the tension arm 16 also rotates in the same direction. 2, the tension pulley 14 is separated from the transmission belt 9 and the belt is relaxed.
The transmission to 1 is cut off. At this time, as the tension arm 16 rotates, the interlocking pin 25 also rotates at the same time.
The pressing force to the brake operation arm 15b is released, the operation arm 15b is rotated clockwise by the brake spring 23 in the figure, and the brake arm 15 is also rotated in the same direction to rotate the peripheral surface of the driven pulley 11. The driven pulley 11 and the snow collecting auger 4 and the blower 5 can be instantaneously stopped.

The interlocking timing of the tension arm 16 and the brake arm 15 can be appropriately adjusted by adjusting the position of the interlocking pin 25.
Also, when the transmission belt 9 is loosened or the brake lining is worn and the timing is shifted, the interlocking pin 25
It is possible to easily readjust by finely adjusting the position of.

In the above embodiment, the brake arm 15 is brought into pressure contact with the peripheral surface of the driven pulley 11, but a brake drum is provided integrally with or separately from the driven pulley 11.
The brake arm may be pressed against the peripheral surface of the brake drum, and the brake arm 15 and the tension arm 16 are supported by the common support shaft 19 in the above embodiment, but they are supported by different support shafts. You can also

FIGS. 5 to 7 show an example thereof, and members having the same functions as those of the embodiments of FIGS. 1 to 4 will be described with the same reference numerals. In this embodiment, the driven pulley 11 is used.
The brake drum 30 is integrally provided on the side surface of the brake drum 30, and the brake arm 15 is pressed against the peripheral surface of the brake drum 30. Also brake arm 1
5 and the tension arm 16 are separate support shafts 2
It is rotatably supported by 8 ・ 29, and each support shaft 2
8 and 29 are attached to the machine body frame 17 via brackets 31 and 32, respectively. Further, an operation wire 21 for rotating the tension operation arm 16b is arranged in the vertical direction.

The other structure is the same as that of the above-described embodiment, and in this embodiment as well, as in the case of the embodiment, the drive pulley 8 to the driven pulley 11 by the tension pulley 14 are used.
The brake arm 15 can be rotated into a braking / non-braking state in synchronism with the intermittent operation of power to the brake arm 15.

In each of the above embodiments, the interlocking pin 2 is used.
Although 5 is provided on the tension arm 16 side, it may be provided on the brake arm 15 side, for example, the brake operation arm 1
The 5b interlocking pin 25 may be provided, and the tension arm 16 may be brought into contact with the interlocking pin 25 to rotate the brake arm 15. Further, although the above-described embodiment has been described by taking the case of being applied to the snow remover as an example, it can be applied to other various working machines.

[0022]

As described above, in the braking device for a working machine according to the present invention, the brake arm 15 is provided on the peripheral surface of the driven pulley 11 or the brake drum 30 provided integrally with the driven pulley 11.
Since it is made to press contact with each other, it is possible to secure a sufficient braking force, and the tension arm 16 and the brake arm 15 that support the tension pulley 14 are rotatably supported independently of each other. By providing the interlocking pin 25 for rotating the brake arm 15 in conjunction with the rotational movement of the position adjusting member on the tension arm 16 or the brake arm 15 side, the transmission belt 9 may be loosened or the brake lining Even if it is worn, by adjusting the position of the interlocking pin 25, the interlocking operation can be surely executed, and it is possible to provide a braking device for a working machine having excellent responsiveness and braking performance. There is.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a snow remover to which a braking device according to the present invention is applied.

FIG. 2 is a rear view of the main part of the braking device according to the present invention.

FIG. 3 is a side view of a main part of the braking device according to the present invention.

FIG. 4 is a rear view of the braking device according to the present invention in a non-braking state.

FIG. 5 is a rear view of the essential parts of another embodiment of the braking device according to the present invention.

FIG. 6 is a side view of the essential parts of the above-described embodiment of the braking device according to the present invention.

FIG. 7 is a rear view of the above-described embodiment of the braking device according to the present invention in a non-braking state.

[Explanation of symbols]

 1 Aircraft 2 Engine 3 Crawler 4 Snow collecting auger 5 Blower 8 Drive pulley 9 Transmission belt 10 Blower shaft 11 Driven pulley 14 Tension pulley 15 Brake arm 16 Tension arm 30 Brake drum

Claims (3)

[Claims] 1. A belt is transmitted from a drive pulley on the side of a prime mover such as an engine to a driven pulley on the side of a working machine, and a tension pulley is separated from or press-contacted to the belt so that power is intermittently connected from the drive pulley to the driven pulley. In the braking device of the working machine, which is adapted to operate the working machine braking brake in a braking or non-braking state in conjunction with the intermittent operation of power by the tension pulley, a tension arm supporting the tension pulley and the driven pulley. Alternatively, a brake arm, which is provided integrally with the brake arm and is in pressure contact with the peripheral surface of the brake drum, is rotatably supported independently of each other, and an interlocking pin for rotating the brake arm in conjunction with the rotation operation of the tension arm is provided. , The above-mentioned tension arm or brake arm is provided so that its position can be adjusted. Braking device for industrial machines. 2. The braking device for a working machine according to claim 1, wherein the tension arm and the brake arm are rotatably supported on the same axis. 3. The braking device for a working machine according to claim 1, wherein the tension arm and the brake arm are rotatably supported on different axes.