JP3738493B2 - Cleaning car clutch device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clutch device for a cleaning vehicle that selects any one of two transmission paths constituted by a belt hook and transmits the rotation of a driving pulley to a driven pulley as forward or reverse rotation.
[0002]
[Prior art]
In the cleaning vehicle, as illustrated in FIG. 5, the dust collecting blower is always rotated by rotation of the engine 2, while the driving pulley 17 is forward or reverse via the clutch device 4, the differential mechanism 3, and the chain 17 a. It can be rotated and moved forward and backward.
Conventionally, the clutch device 4 has a drive pulley 19 fixed to a drive shaft 2a of an engine 2 disposed at the center of the machine body frame 1 and is pivoted about the drive shaft 2a to which the drive pulley 19 is fixed. Two guide pulleys 21 and 22 are rotatably attached to the plate 20, and one guide pulley 21 attached to the swing plate 20 and a driven pulley 23 fixed to the rotating shaft 3 a of the differential mechanism 3. A first transmission path formed so that the guide pulley 25 is brought into contact with the belt 24 stretched between the loops from the inside of the loop and the drive pulley 19 is pressed from the outside of the loop; Hang between another drive pulley 26 fixed to the drive shaft 2a and another driven pulley 27 fixed to the rotating shaft 3a of the differential mechanism 3. And a second transmission path formed by pressing another guide pulley 22 attached to the swing plate 20 from the inside of the loop with respect to the belt 28, and the swing plate And a structure in which the application of tension to the belts 24 and 28 in the first or second transmission path is reversed by the guide pulleys 21 and 22 attached to the swinging plate 20 by the rotation operation of the rotation plate 20. It was.
[0003]
[Problems to be solved by the invention]
In the conventional clutch device, the oscillating plate 20 is disposed so as to be rotatable about the drive shaft 2a, and the oscillating plate 20 is located at four positions around the axis with respect to the half-moon-shaped slot 29. Therefore, it is difficult to adjust the four support portions so that the four support portions are accurately and equally supported, and the swing plate 20 is driven. The parallelism with respect to the plane orthogonal to the shaft 2a cannot be maintained, and the guide pulleys 21 and 22 attached to the rocking plate 20 slightly move in the axial direction every time the rocking operation is performed, and in the thickness direction of the guide pulley. Deviation occurs (hereinafter, this deviation is referred to as misalignment).
If a misalignment occurs between the guide pulley and the belt, not only will abnormal noise be generated or the transmission function deteriorated, but the durability of the belt may be impaired.
[0004]
[Means for Solving the Problems]
The present invention is a clutch device having a structure that reversely switches two transmission paths using a belt, in which a phase shift is unlikely to occur between the guide pulley and the belt, and the configuration is fixed to the output shaft. The drive pulley fixed to the drive shaft is attached to the outside of the loop on the belt that is parallelly mounted so that the inner surface of the loop is in contact with the driven pulley and two guide pulleys that are spaced apart from the driven pulley. A first transmission path formed so as to be in pressure contact with a portion spanned between the two guide pulleys, another driven pulley fixed to the output shaft, and another fixed to the drive shaft The drive pulleys, and the guide pulleys that are spaced apart from the driven pulleys and the drive pulleys, are formed by paralleling the belt so that the inner surface of the loop contacts And a second transmission path that is formed on the arm-shaped bent so as to avoid interference with the drive shaft, the rocking body which rotates in a direction orthogonal to the output shaft to the one end as a fulcrum, the first And one guide pulley in each of the second transmission paths is rotatably attached, and the tension on the belt by the guide pulley attached to the swinging body with respect to the first transmission path by rotating the swinging body. It is possible to perform a reverse switching operation between applying and applying tension to the belt by a guide pulley attached to the swinging body with respect to the second transmission path.
And the guide pulley arrange | positioned between a drive pulley and a driven pulley can be employ | adopted for the guide pulley attached to the rocking | fluctuation body in a said 1st transmission path.
[0005]
[Action]
Since the rocking body has a one-point support structure, the rocking body is less likely to rattle, and the guide pulley attached to the rocking body is less likely to be misaligned.
Further, if a bending arm-like oscillating body is employed, there is no interference with the drive shaft during oscillating.
Furthermore, if a drive pulley and a guide pulley interposed in the middle are selected as the guide pulley to be attached to the rocking body, the tension force is adjusted by the guide pulley and the main support portion does not move, so there is an effect on misalignment. Few.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a clutch device according to the present invention will be described with reference to the drawings.
FIG. 1 shows a clutch device mounted on a cleaning vehicle. In the cleaning vehicle, an engine 2 is mounted in the center of a body frame 1, and a differential mechanism 3 is disposed in front of the engine 2. The clutch device 4 functions to transmit the rotation of the engine 1 to the differential mechanism 3.
Four drive pulleys 5 (5a, 5b, 5c, 5d) are fixed to the drive shaft 2a that outputs the rotation of the engine 2, and the first drive pulley 5a is disposed almost directly below the engine 2. The second driving pulley 5b is used to transmit rotation to the dust collecting blower 7 via the belt 7a. Is done.
[0007]
The third and fourth drive pulleys 5c and 5d are used as a part of members constituting the clutch device 4 that transmits the rotation of the drive shaft 2a to the differential mechanism 3, and the clutch device 4 2, one driven pulley 8a of two driven pulleys 8 (8a, 8b) fixed to the rotating shaft 3a of the differential mechanism 3 serving as an output shaft, and the drive pulley 5c A flat belt 10 is placed in parallel with the guide pulley 9 arranged at the rear, the guide pulley 11 is brought into contact with the flat belt 10 from the inside of the loop, and the third drive pulley 5c is attached from the outside of the loop. A first transmission path that is brought into pressure contact and transmits rotation in the opposite direction to the drive pulley 5c to the driven pulley 8a, the fourth drive pulley 5d, and the fourth drive pulley; The V-belt 13 is placed in parallel so that the inner surface of the loop is in contact with the guide pulley 12 arranged at the lower part of 5d and the other driven pulley 8b fixed to the rotating shaft 3a of the differential mechanism 3, and the driven pulley And a second transmission path for transmitting rotation in the same direction as the drive pulley 5d to 8b.
The clutch device 4 is provided with a swinging arm 14 as a swinging body that rotates along a plane orthogonal to the drive shaft 2a, with one end positioned at an upper portion of the drive shaft 2a as a fulcrum, for example. A guide pulley 11 that constitutes the first transmission path and a guide pulley 12 that constitutes the second transmission path are attached to the swing arm 14.
The swing arm 14 is bent so as to turn from the front side of the drive shaft 2a to the lower rear side so as to avoid interference with the drive shaft 2a when swinging, and a clutch lever 15 is connected to the free end. Has been.
The clutch lever 15 has a distal end projecting from the rear upper part of the body frame 1 and a base end portion connected to the swing arm 14 is urged to return to a neutral position by a coil spooling 16.
[0008]
According to the clutch device thus formed, when the engine 2 is started and the clutch lever 15 is pushed down, the swing arm 14 rotates counterclockwise in the drawing and is attached to the swing arm 14. When the guide pulley 11 is pushed upward, tension is applied to the flat belt 10, the first transmission path is operated, and the driven pulley 8a rotates in the opposite direction to the drive pulley 5c (FIG. 3), and the chain It advances by the drive wheel 17 rotating in the same direction via 17a.
When the push-down force of the clutch lever 15 is released, the swing arm 14 returns to the neutral position by the force of the coil spooling 16, the first transmission path stops operating, and the vehicle stops.
On the other hand, when the clutch lever 15 is pulled up, the swinging arm 14 rotates clockwise in the drawing and the guide pulley 12 is pulled backward, and tension is applied to the V belt 13. The second transmission path operates, the driven pulley 8b rotates in the same direction as the drive pulley 5d (FIG. 4), and the cleaning vehicle moves backward.
[0009]
When the operation of pressing the guide pulley 11 to the flat belt 10 and the operation of pressing the guide pulley 12 to the V-belt 13 are reversed by operating the clutch lever 15, the swing arm 14 is supported at one point. It is advantageous to reduce the rattling, and the misalignment of the guide pulley can be reduced by reducing the rattling.
Further, by making the swinging body into a bent arm shape, interference with the drive shaft can be avoided, and as a guide pulley to be attached to the swinging arm 14 in the first transmission path, it is far away from the two driven pulleys 8a. The flat belt 10 that is stretched between the guide pulley 9 and the driven pulley 8a that are arranged in an auxiliary manner is arranged at an intermediate position between the guide pulley 9 and the driven pulley 8a, and the driven pulley By selecting the guide pulley 11 that is closer to 8a, even if the guide pulley 11 rotates in the axial direction when the swing arm 14 is rotated, the flat belt 10 will be in a fixed position even if it causes misalignment. Since it is securely supported by the guide pulley 9 and the driven pulley 8a arranged so as not to be misaligned, it is almost impossible to be affected by the movement of the guide pulley 11. No etc..
[0010]
In the above embodiment, a V-belt is used for the second transmission path, but a flat belt can also be used, and the swinging body is not limited to a bending arm as long as it is supported at one point. Also, the guide pulley attached to the swinging body is not a guide pulley that is auxiliary disposed in the middle, but as shown in FIG. 4, for example, the S-shaped swinging arm 18 is separated from the driven pulley. The main guide pulley 9 that supports the flat belt 10 is attached, and the auxiliary guide pulley 11 is provided at a fixed position. It changes suitably according to arrangement | positioning of a drive pulley, a driven pulley, and a guide pulley.
[0011]
In the above embodiment, the driving pulley and the driven pulley and the two types of guide pulleys are spanned in the first transmission path, and the driving pulley, the driven pulley and one guide pulley are spanned in the second transmission path. However, a pulley outside the driving pulley, driven pulley, and guide pulley may be added to each transmission path.
Further, the swinging body can be rotated by means other than the clutch lever, and is applied not only to an engine-driven vehicle but also to a motor-driven vehicle using a battery.
[0012]
【The invention's effect】
According to the present invention, in the clutch device using the belt, there is no phase shift between the guide pulley and the belt, and the belt is reliably centered.
In addition, by adopting a bent arm for the rocking body, it can be efficiently incorporated by avoiding interference with the drive shaft, and as a target to be attached to the rocking body, a guide pulley disposed between the driving pulley and the driven pulley That is, if the guide pulley closer to the driven pulley is selected, the belt is reliably supported by the driven pulley and the guide pulley separated from the driven pulley, and the center is not easily displaced.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a state where a clutch device according to the present invention is mounted on a cleaning vehicle.
FIG. 2 is an explanatory diagram of a clutch device.
FIGS. 3A and 3B are explanatory views showing a switching operation of the clutch device separately for a first transmission path and a second transmission path.
FIG. 4 is an explanatory diagram of a modification example.
FIG. 5 is an explanatory diagram of a conventional example.
[Explanation of symbols]
1. ・ Airframe, 2. ・ Engine, 2a ・ ・ Drive shaft, 3 ・ Differential mechanism, 3a ・ ・ Rotating shaft, 4 ・ ・ Clutch device, 5 (5a, 5b, 5c, 5d) ・ ・ Drive pulley , 6 .. Rotating brush, 7 .. Blower, 6 a, 7 a .. Belt, 8 (8 a, 8 b) .. Driven pulley, 9. .. Guide pulley, 10. .. Flat belt, 11, 12. .. Guide pulley, 13 .... V belt, 14 .... oscillating arm, 15 .... clutch lever, 16 .... coil spooling, 17 .... drive wheel, 17a ... chain, 18 .... oscillating arm, 19 .... driving pulley, 20 .. Oscillating plate 21, 22 .. Guide pulley, 23 .. Driven pulley, 24 .. Belt, 25 .. Guide pulley, 26 .. Drive pulley, 27 .. Driven pulley, 28. ..Long holes, 0 ... bolt.

Claims (2)

A drive pulley fixed to the drive shaft on a belt that is parallelly mounted so that the inner surface of the loop is in contact with a driven pulley fixed to the output shaft and two guide pulleys spaced apart from the driven pulley. Is arranged so as to be pressed against a portion spanned between the two guide pulleys from the outside of the loop, another driven pulley fixed to the output shaft, and a drive shaft. A second transmission path formed by paralleling the belt so that the inner surface of the loop comes into contact with another fixed driving pulley and a guide pulley spaced apart from the driven pulley and the driving pulley. the a, are formed on the bent arm-shaped so as to avoid interference with the drive shaft, the rocking body which rotates in a direction orthogonal to the output shaft to the one end as a fulcrum, the first and second heat transfer Each guide pulley in the path is rotatably attached to each other, and tension is applied to the belt by the guide pulley attached to the rocking body with respect to the first transmission path by rotating the rocking body. 2. A clutch device for a cleaning vehicle, which enables a reverse switching operation to apply tension to a belt by a guide pulley attached to a rocking body with respect to two transmission paths.  The clutch device for a cleaning vehicle according to claim 1, wherein the guide pulley attached to the swinging body in the first transmission path is a guide pulley disposed between the drive pulley and the driven pulley.

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