JP2002257162A - Brake apparatus of working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake apparatus of a working machine capable of always keeping the brake apparatus in an operating state and also obtaining braking performance with sure, quick response. SOLUTION: In order to transmitting power from an engine 2 to driving wheels 6 and 6, the brake apparatus of a self-propelled powered sprayer S is comprised of a driving-side pulley 21 driven by the engine 2, a driven-side pulley 24 driving the driving wheels 6 and 6, and a belt 25 winding up between the pulleys 21 and 24. The brake apparatus, in which the belt 25 is pushed from the outside by urging force of an extension coil spring 42, is comprised of a braking member B preventing rotation of the driven-side pulley 24 by pushing the belt 25 onto the driven-side pulley 24, and a brake releasing unit BK releasing pushed pressure to the belt 25 of the braking member B by withstanding urging force of the extension coil spring 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a brake device for a working machine such as a self-propelled power sprayer.

[0002]

2. Description of the Related Art Conventionally, a brake device of a self-propelled power sprayer has a brake lever mounted on a handle, and the brake wire is pulled by gripping the brake lever, and the brake is composed of a plate or the like connected to the brake wire. There is known an apparatus in which a wheel is directly pressed by a member to stop the rotation of the wheel.

[0003]

However, in such a conventional brake device for a self-propelled power sprayer, the rotation of the wheels is stopped when the brake lever is operated, so that it is loaded on a truck or the like. However, when the danger is immediately avoided when traveling on an inclined surface such as loading and unloading, the response of the braking operation may be delayed. In addition, a working machine such as a self-propelled power sprayer is usually placed in a stationary state simply by loading and unloading on a truck or the like, or traveling a short distance from a truck or the like to a storage location. . Therefore, it is desirable that the brake device always be in a state of preventing travel. Furthermore, in the conventional brake device, since the rotation of the wheel is stopped by directly pressing the wheel with the brake member made of a plate or the like, the frictional force between the brake member and the wheel is not sufficient,
It is difficult to reliably stop the wheels.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a brake device for a working machine capable of constantly operating a brake and obtaining reliable and quick braking performance. The purpose is to:

[0005]

According to a first aspect of the present invention, there is provided a brake device for a working machine for transmitting power from a prime mover (2) to a driven portion (6, 6). A driving pulley (21) driven by the prime mover (2), a driven pulley (24) driving the driven parts (6, 6), and these pulleys (21, 24).
A brake device for a working machine (S) including a belt (25) wound between the urging members (4).
The belt (25) is pressed from the outside by the urging force of 2), and the belt (25) is pressed by the driven pulley (24).
A brake member (B) for pressing the driven member (24) against the driven side pulley (24), and the belt (2) of the brake member (B) against the urging force of the urging member (42).
5) Brake release device (BK) that releases pressure on
And characterized in that:

According to the first aspect of the present invention, the brake can be always operated and the brake can be released only when power is transmitted to the driven portion. Therefore, it is possible to prevent the driven part from being inadvertently operated during work or the like. Further, since the belt is pressed from the outside by the brake member and the belt is pressed against the driven pulley to prevent the driven pulley from rotating, the frictional force of the belt is large, so that the braking performance is high. When it is necessary to urgently apply a brake while the driven portion is operating, if the operation of the brake release device is stopped, the brake member immediately stops the rotation of the driven pulley by the urging force of the urging member. So
The driven part can be stopped easily, reliably and quickly.

According to a second aspect of the present invention, in the brake device for a working machine according to the first aspect, the brake member (B) is provided on a brake arm (41) and the brake arm (41). A pressing portion (45), and the brake arm (41) normally rotates in a direction in which the pressing portion (45) approaches the belt (25) by the urging force of the urging member (42). Is moved,
The pressing portion (45) presses the belt (25) from the outside by the urging force of the urging member (42), and presses the belt (25) against the driven pulley (24) to move the belt (25) to the driven side. The brake release device (BK) prevents rotation of the pulley (24), and the brake release device (BK) opposes the urging force of the urging member (42).
1) by rotating the pressing portion (45) in a direction away from the belt (25) to release the pressing of the pressing portion (45) against the belt (25). And

According to the second aspect of the present invention, the brake can be always operated and the brake can be released only when power is transmitted to the driven portion. Therefore, it is possible to prevent the driven part from being inadvertently operated during work or the like. Further, the belt is pressed from the outside by a pressing portion provided on the brake arm, and the belt is pressed against the driven pulley to prevent the rotation of the driven pulley. Is high. Also, when it is necessary to apply an emergency brake while the driven part is operating, if the operation of the brake release device is stopped, the urging force of the urging member immediately causes the brake arm to move the pressing part closer to the belt Then, the pressing portion prevents the driven pulley from rotating by the urging force of the urging member, so that the operation of the driven portion can be stopped simply, reliably and quickly.

A brake device for a working machine according to a third aspect of the present invention is the invention according to the first or second aspect, wherein the tension pulley (5) rotatably provided at one end is provided.
3) A tension arm (51) rotatable about a fulcrum (32) and attached to the tension arm (51) in a direction in which the tension pulley (53) separates from the belt (25). Urging member (5
2) a clutch operating device (KS) for pressing the tension pulley (53) against the belt (25) against the urging force of the urging member (52); and a clutch operating device (KS) provided for the tension arm (51). And the clutch operating device (K
At the time of operation S), the brake member (B) or the pressing portion (45) is engaged with the brake member (B) or the brake arm (41) and the belt (25).
Engaging part (56) for moving to a position where the pressing is released
And a tension clutch (K) having the following.

According to the third aspect of the present invention, the operation is simple because the brake can be released at the same time and the driven portion can be driven only by operating the clutch operating device. Further, only the brake can be applied by operating only the brake release device. In addition, when it is necessary to urgently apply the brake, if the operation of the clutch operating device is stopped, the brake member or the pressing portion immediately stops the rotation of the driven pulley by the urging force of the urging member, so that it is simple and easy. The operation of the driven part can be stopped reliably and quickly.

According to a fourth aspect of the present invention, in the brake device for a working machine according to any one of the first to third aspects, the driven parts (6, 6) are driven wheels (6, 6). The work machine (S) is a self-propelled work machine (S).

In the invention described in claim 4, the brake device of the present invention is applied to a belt transmission mechanism for transmitting power from a prime mover to drive wheels in a self-propelled working machine such as a self-propelled power sprayer. Therefore, it is possible to always apply a brake to the drive wheels, to obtain a reliable and quick responsive braking performance, and to perform safe traveling and work.

[0013] Incidentally, reference numerals in parentheses in the above are for convenience describing corresponding elements in the drawings,
Therefore, the present invention is not limited to the description on the drawings. The same applies to the description in the column of “Claims”.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a self-propelled power sprayer according to an embodiment of the present invention, and FIG. 2 is a plan view. The self-propelled power sprayer (self-propelled work machine, work machine) S includes a body frame 1, an engine (motor) 2, a pump 3, a hose reel 4, a handle 5, and left and right driving wheels (wheels) as front wheels. 6, 6 and left and right wheels 7, 7 comprising casters as rear wheels.

The engine 2 and the pump 3 are arranged in front of the body frame 1 in the traveling direction, and the pump 3 is driven by the engine 2 via a pulley and a belt transmission mechanism. A tension clutch is provided on the belt, and the tension clutch is engaged and disengaged by operating a lever 11.

The hose reel 4 is installed on the rear side of the body frame 1 in the traveling direction. A belt is wound between the pulley of the pump 3 and the pulley of the hose reel 4, and the engine is passed through the pump 3. 2 is transmitted.
A tension clutch is provided on the belt, and the tension clutch is engaged and disengaged by operating a lever 12. A hose 13 is wound around the hose reel 4. A base end of the hose 13 is connected to a discharge port of the pump 3 via a connection hose 14, and a nozzle is attached to one end. By operating the lever 12 to engage the tension clutch, the hose 13 drawn from the hose reel 4 can be wound by power. In order to wind the hose 13 around the hose reel 4 in order, a traverse mechanism (not shown) for reciprocating a hose guide 15 installed above and behind the hose reel 4 in the left-right direction parallel to the rotation axis of the hose reel 4. Z) is provided. The hose guide 15 can be rotated horizontally so that the drawing direction of the hose 13 can be selected.

The handle 5 is attached to the rear end of the body frame 1 in the traveling direction so as to protrude rearward in the traveling direction in a U-shape in plan view. The left and right drive wheels 6, 6 are provided below the front end of the body frame 1 in the traveling direction. On the other hand, the left and right wheels 7, 7 formed of casters are mounted below the rear end of the body frame 1 in the traveling direction. ing.

Left and right drive wheels (driven parts) from the engine 2
The power transmission mechanism to 6, 6 is configured as follows. That is, as shown in FIG. 3, the drive side pulley 21 is fixed to the drive shaft of the engine 2. On the other hand, the support frame 2
The driven pulley 24 is fixed to a central portion of an intermediate transmission shaft (rotation shaft) 23 rotatably supported between the support frames 22, 22. . A belt 25 is wound between the driving pulley 21 and the driven pulley 24. A pinion gear 26 is formed at one end of the intermediate transmission shaft 23. An axle 27 is rotatably supported between the support frames 22, 22 below the intermediate transmission shaft. A gear 28 is fixed to the axle 27, and the gear 28 is meshed with a pinion gear 26 of the intermediate transmission shaft 23. Left and right drive wheels 6, 6 are fixed to both ends of the axle 27.

At the center of the body frame 1 between the support frames 22, 22, a bracket 31 having a U-shaped cross section which is open forward and vertically in the traveling direction is attached. A support shaft (fulcrum) 32 extending horizontally in the left-right direction is penetrated and fixed between the left and right side walls of the bracket 31. A belt 25 is attached to the support shaft 32.
A strip-shaped brake arm 41 is rotatably supported on one side on the left and right sides in the traveling direction around the center, and a strip-shaped tension arm 51 is rotatably supported on the other side.

As shown in FIGS. 3 and 4, a lower end of a tension coil spring (biasing member) 42 is attached to an end of the brake arm 41 below the support shaft 32. The upper end of the spring 42 is attached to the body frame 1. On the other hand, brake arm 4
One end of a brake wire 43 is attached to an end above the one support shaft 32, and the other end of the brake wire 43 is located on the left side in the traveling direction of the handle 5 as shown in FIG. The installed brake release lever 44
Attached to. As shown in FIGS. 3, 4, and 5, the brake arm 41 is provided between the portion where the brake wire 43 is attached and the support shaft 32.
The plate-shaped pressing portion 45 is provided so as to project in a direction orthogonal to the longitudinal direction of the brake arm 41. The brake member B is constituted by the brake arm 41 and the pressing portion 45. Note that the brake arm 41 and the pressing portion 45 may be formed integrally.

The pressing portion 45 normally presses the belt 25 from outside by the urging force of the tension coil spring 42,
The belt 25 is pressed against the driven pulley 24 to prevent the driven pulley 24 from rotating. This pressing portion 45
By pulling the brake wire 43 while holding the brake release lever 44, the brake arm 41 rotates around the support shaft 32 in a direction away from the belt 25,
The pressing on the belt 25 is released, and the brake is released. The brake release device BK is constituted by the brake wire 43 and the brake release lever 44.

A lower end of a tension coil spring (biasing member) 52 is attached to an end of the tension arm 51 below the support shaft 32, and the upper end of the tension coil spring 52 is attached to the body frame 1. Attached to. On the other hand, a tension pulley 53 is rotatably attached to an end of the tension arm 51 above the support shaft 32. Further, one end of a clutch wire 54 is attached to the tension arm 51 between the tension pulley 53 and the support shaft 32, and the other end of the clutch wire 54 is connected as shown in FIGS. Also, it is attached to a clutch lever 55 installed on the right side of the handle 5 in the traveling direction. The clutch wire 54 and the clutch lever 55 constitute a clutch operating device KS. Also, as shown in FIGS. 4 and 6, the tension arm 51 has a clutch wire 5
A round bar-shaped engaging portion 56 is provided between the position where the 4 is attached and the support shaft 32 so as to project in a direction orthogonal to the longitudinal direction of the tension arm 51. Tension arm 51, tension coil spring 52, tension pulley 53, clutch operating device KS, and engaging portion 56
Thus, the tension clutch K is configured.

The tension pulley 53 is normally separated from the belt 25 by the urging force of the tension coil spring 52, whereby the belt 25 is relaxed and the tension clutch K is in a disengaged state. The tension pulley 53 grips the clutch lever 55 and pulls the clutch wire 54, whereby the tension arm 51 rotates around the support shaft 32 in a direction to approach the belt 25, and presses the belt 25 from the outside. As a result, the tension clutch K is engaged. Further, when the tension arm 51 rotates around the support shaft 32 in a direction approaching the belt 25, the engaging portion 56 provided on the tension arm 51 engages (contacts) with the brake arm 41. , Tension arm 51
With the rotation of the brake arm 41, the brake arm 41 is rotated about the support shaft 32 in a direction away from the belt 25, and the brake arm 41 is moved to a position where the pressing on the belt 25 is released, and the brake is released. It is to be released.

As shown in FIG. 7, in the brake device of the traveling type power sprayer S, the belt 25 is normally pressed by the pressing portion 45 provided on the brake arm 41 by the urging force of the tension coil spring 42. Is pressed from the outside, and the belt 25 is pressed against the driven pulley 24 to prevent the driven pulley 24 from rotating. Therefore, the driven pulley 24 does not rotate carelessly at the time of work or the like, so that the drive wheels 6, 6 that are gear-transmitted to the driven pulley 24 do not rotate carelessly.

On the other hand, when the traveling power sprayer S is moved by human power, the brake release lever 44 is gripped and the brake wire 43 is pulled. In this way, as shown in FIG. 8, the brake arm 41 rotates around the support shaft 32 in a direction away from the belt 25, and
Is released, and the brake is released. By pushing the traveling power sprayer S while holding down the brake release lever 44, the traveling power sprayer S can be moved manually.

In order to make the traveling power sprayer S run by itself, the clutch wire 55 is gripped and the clutch wire 54 is pulled. In this way, as shown in FIG. 9, the tension arm 51 is
5, the belt 25 is pressed from the outside, and the tension clutch K is engaged. At the same time, the engaging portion 56 provided on the tension arm 51 engages with the brake arm 41, and the tension arm 51
With the rotation of the brake arm 41, the brake arm 41 rotates about the support shaft 32 in a direction away from the belt 25, and the brake arm 41 moves to a position where the pressing on the belt 25 is released, and the brake is released. Is done. If the clutch lever 55 is kept being held, the traveling power sprayer S continues to run.

The traveling type power sprayer S constructed as described above
In this brake device, the brake can be always operated and the brake can be released only during traveling. Therefore, it is possible to prevent the traveling power sprayer S from inadvertently moving during work or the like. Further, the belt 25 is pressed from the outside by a pressing portion 45 provided on the brake arm 41, and the belt 2 is pressed.
5 is pressed against the driven pulley 24 so that the driven pulley 2
Since the rotation of the belt 25 is prevented, the braking performance is high because the frictional force of the belt 25 is large.

Also, just by gripping the clutch lever 55,
At the same time, the brake can be released to allow the traveling power sprayer S to run by itself, so that the operation is simple. further,
The self-propelled power sprayer S can be moved by human power by gripping only the brake release lever 44, so that the self-propelled power sprayer S can be easily moved even when the engine runs out of fuel or the battery runs out. Can be done.

Further, when the traveling type power sprayer S is self-propelled, the power sprayer S can be stopped only by releasing the clutch lever 55, so that no force is required for brake operation. Even when it is necessary to stop the vehicle urgently, such as when running on an inclined surface such as loading or unloading a truck, etc., it is possible to easily and reliably stop the responsiveness quickly. In addition, when the traveling type power sprayer S is moved by human power, the brake can be operated without the need for the force at the time of the brake operation only by releasing the brake release lever 44, so that the brake can be reliably stopped. . In addition, even in an emergency, it is possible to easily and reliably stop the responsiveness quickly.

In the above-described embodiment, the case where the present invention is applied to the brake device of the belt transmission mechanism for transmitting the power from the engine 2 to the drive wheels 6 and 6 in the traveling power sprayer S has been described. The present invention is not limited to this, and can be applied to a brake device of a working machine such as a traveling carrier. Further, the present invention can be applied to a brake device of a belt transmission mechanism that transmits power from a prime mover to a hose reel in a power sprayer with a hose winder.

[0031]

As described above, according to the brake device for a working machine of the present invention, the brake can always be put into the operating state, and a reliable and quick response braking performance can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a self-propelled power sprayer according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view partially omitted.

FIG. 4 is a side view of FIG. 3 partially omitted;

5A and 5B are views showing a brake member according to the embodiment of the present invention, wherein FIG. 5A is a front view and FIG. 5B is a side view.

FIG. 6 shows a tension arm according to an embodiment of the present invention;
It is a diagram showing a tension pulley and an engagement portion,
(A) is a front view, (b) is a side view.

FIG. 7 is a diagram for explaining a relationship between a brake member and a tension arm unit according to the embodiment of the present invention, and is a diagram showing a state at all times.

FIG. 8 is a diagram showing a state in which the traveling power sprayer is moved by human power.

FIG. 9 is a diagram showing a state in which the traveling type power sprayer is caused to travel by itself.

[Description of Signs] S Self-propelled power sprayer (self-propelled work machine, work machine) 2 Engine (motor) 6 Drive wheel (driven portion) 21 Drive pulley 24 Driven pulley 25 Belt 32 Support shaft (fulcrum) 41) Brake arm 42 Tension coil spring (biasing member) 43 Brake wire 44 Brake release lever 45 Pressing part B Brake member BK Brake release device 51 Tension arm 52 Tension coil spring (biasing member) 53 Tension pulley 54 Clutch wire 55 Clutch Lever 56 Engagement part KS Clutch operating device K Tension clutch

Claims (4)

[Claims] 1. A drive pulley (21) driven by the prime mover (2) for transmitting power from the prime mover (2) to the driven parts (6, 6), and the driven part (6, 6).
6) A brake device for a working machine (S) comprising a driven pulley (24) for driving the pulley and a belt (25) wound between the pulleys (21, 24). The belt (25) is pressed from the outside by the urging force of the urging member (42), and the belt (25) is pressed against the driven pulley (24) to prevent rotation of the driven pulley (24). And a brake release device (BK) for releasing the pressing of the brake member (B) against the belt (25) against the urging force of the urging member (42). A brake device for a working machine, comprising: 2. The brake member (B) includes a brake arm (41) and a pressing portion (45) provided on the brake arm (41).
1) Normally, the urging force of the urging member (42) causes the pressing portion (45) to rotate in a direction approaching the belt (25), and the pressing portion (45)
Presses the belt (25) from outside by the urging force of the urging member (42), and presses the belt (25) against the driven pulley (24) to rotate the driven pulley (24). The brake release device (BK) is provided with the urging member (4).
In response to the urging force of 2), the brake arm (41) is rotated in a direction in which the pressing portion (45) is separated from the belt (25), and the belt (25) of the pressing portion (45) is rotated. 2. The brake device for a working machine according to claim 1, wherein the pressing is released. 3. A tension arm (51) having a tension pulley (53) rotatably provided at one end thereof and rotatable about a fulcrum (32). An urging member (52) for urging the tension pulley (53) away from the belt (25); and urging the tension pulley (53) against the urging force of the urging member (52). A clutch operating device (KS) for pressing the belt (25); and a brake operating device (KS) provided on the tension arm (51), the brake member (B) or the brake arm (41) being operated when the clutch operating device (KS) is operated. Engage,
An engagement portion (56) for moving the brake member (B) or the pressing portion (45) to a position where the pressing on the belt (25) is released; and a tension clutch (K) including: The brake device for a working machine according to claim 1 or 2, wherein: 4. The driven part (6, 6) includes a driving wheel (6, 6).
6. The brake device for a working machine according to claim 1, wherein the working machine (S) is a self-propelled working machine (S).