JPH0542091Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a snow removal device that can automatically change the rotation ratio of an auger and a blower depending on conditions such as snow quality.

[Prior Art] As is well known, a snow removal device such as that disclosed in Japanese Utility Model Publication No. 11298/1983 is generally used to remove accumulated snow as necessary.

This snow removal device will be explained with reference to FIGS. 5 and 6. When a shaft 3 is rotated by a drive device 1 via a belt transmission device 2 in which a tension pulley 2a which also serves as a clutch is interposed, The auger rotation shaft 4a, which is connected orthogonally to the shaft 3 within the auger case 5, is rotated. Then, the auger 4 fixed to the auger rotation shaft 4a is rotated, and the auger 4 accumulates snow toward the blower housing 6, which is connected to the auger case 5. This blower housing 6
Inside, a blower 8 is mounted on the shaft 3.
is being rotated, and this blower 8 applies centrifugal force to the snow accumulated on the blower housing 6.
Snow is thrown through the chute 9.

[Problem to be solved by the invention] In this prior art, since both the auger 4 and the blower 8 are configured to be rotated simultaneously by the rotation of the shaft 3, the auger 4 and the blower 8
The rotation ratio is always constant regardless of snow quality.

Therefore, when the mass of snow to be removed by the snow removal device is relatively large, for example because it contains a large amount of moisture, the snow throwing capacity of the blower 8 corresponds to the accumulation capacity of the auger 4. Otherwise, the inside of the chute 9 may become clogged with snow.

To deal with this, a reduction gear is interposed between the shaft 3 and the auger rotating shaft 4a, and the blower 7
Although it is conceivable to lower the rotation ratio of the auger 4 to the auger 8, such a configuration would reduce the snow removal ability in cases where the mass is relatively small, such as so-called powder snow. It is also conceivable to vary the rotation ratio between the auger 4 and the blower 8 by having the operator operate the speed reduction device, but this would require a lot of trouble on the part of the operator, and the operator would have limited skill. will be required.

[Purpose of the invention] The present invention was devised in view of the above-mentioned problems, and it is possible to automatically change the rotation ratio of the blower and auger according to the snow quality, thereby reducing snow clogging. The purpose of the present invention is to provide a snow removal device that can avoid the occurrence of snow removal.

[Means for Solving the Problems] In order to achieve the above object, the snow removing device according to the present invention has the snow removing device in which a snow collecting auger and a snow throwing blower are each connected to a drive device. A fluid coupling is interposed between the auger and the drive device.

[Function] With the above configuration, when the load on the auger due to the mass of snow to be removed becomes large, the fluid coupling reduces the rotational speed of the auger due to this load, and the rotational speed of the blower decreases to the rotational speed of the auger. Increased relative to the number.

[Embodiments of the invention] Hereinafter, embodiments of the snow removal device according to the invention will be described with reference to the drawings.

1 to 4 relate to an embodiment of the present invention,
Figure 1 is a plan view of the main parts, Figure 2 is a schematic diagram of the drive system,
FIG. 3 is an overall view of the snow removal device, and FIG. 4 is a characteristic diagram in which the vertical axis shows the ratio between the auger rotation speed and the blower rotation speed, and the horizontal axis shows the load on the auger.

In these figures, numeral 11 is the main body of the snow removal device, 12 is a moving crawler, and 13 is a pair of left and right operating handles.
An operation panel 13a is arranged between the three.

A motor 14, which is an example of a drive device, is fixed on the main body 11, and a plurality of pulleys 16a, 16b are mounted on an output shaft 14a of the motor 14, one of which is a pulley 16a. belt 1
It is connected to the pulley 19 of the drive device 18 via 7.

This drive device 18 includes a transformer plate 21 that is movable in the longitudinal direction of the main body 11, a friction wheel 22 that is movable in the lateral direction of the main body 11, and a friction wheel 22 that is movable in the lateral direction of the main body 11.
The main element is the drive shaft 12a of the crawler 12, which is connected to the shaft 22a of the engine 14 via a gear 23, and the output shaft 1 of the engine 14.
When 4a is rotated, 2 is rotated by the transformer plate 21 via the belt 17 and the friction wheel contacted by the transformer plate 21, and the drive shaft 12a is further rotated via the gear 23, thereby driving the crawler 12. It is becoming more and more common. In addition, the transformer plate 21
The relative position between the crawler 12 and the friction wheel 22 is changed by operating the lever 13b of the operation panel 13a, so that the rotational speed and direction of the crawler 12 can be changed.

On the other hand, an auger case 24 is inserted in the front of the main body 11 at right angles to the front-rear direction of the main body 11, and a blower housing 26 is formed approximately in the center of the auger case 24 on the main body 11 side. There is.

An auger rotating shaft 25a is rotatably supported in the auger case 24 in the longitudinal direction of the auger case 24, and an auger 25 for accumulating snow is fixed to this auger rotating shaft 25a.
5 is rotated, snow is accumulated in the direction of the blower housing 26.

The auger rotation shaft 25a is separated at the center, and each of the separated parts connects to a gear box 25 disposed within the auger case 24.
It is inserted in b. Also, this gear box 2
5b, one end of a shaft 27 disposed at right angles to the auger rotation shaft 25a is inserted, and the shaft 27 and the auger rotation shaft 25a are connected to each other by, for example, a bevel gear or the like installed inside the gear box 25b. It is set up. The rotation ratio between the shaft 27 and the auger rotating shaft 25a is set to a predetermined rotation ratio, for example 10:1, via the bevel gear.
It is set so that

As shown in FIG. 1, the other end of the shaft 27 is connected to a blower rotating shaft 29a via a fluid coupling 28.

The fluid coupling 28 is constructed by sealing fluid such as oil between an impeller 28a and an output wheel 28b, and the shaft 27 is connected to the output wheel 28b. Further, the blower rotation shaft 29a is connected to the impeller 28a, and when the blower rotation shaft 29a is rotated, the shaft 27 is rotated via the fluid in the fluid coupling 28.

The other end of the blower rotating shaft 29a passes through the center of the blower housing 26 and extends through the main body 11.
exposed to the side. A blower 29 that applies centrifugal force to the snow accumulated by the auger 25 is pivotally supported at a portion of the blower rotation shaft 29a that is inserted into the blower housing 26. A pulley 31 is fixed to a portion exposed from the housing 26 toward the main body 11 side.

This pulley 31 is connected to the output shaft 14 of the motor 14.
The above-mentioned pulley 16b and belt 3 are mounted on the shaft a.
They are connected via 2. A tension pulley 33 that is operated by a lever 13c provided on the operation panel 13a and applies tension to the belt 32 is interposed in the middle of the belt 32.

Further, as shown in FIG. 3, a rotatable chute 34 is provided on one side of the blower housing 26, and the snow subjected to centrifugal force by the blower 29 is guided by this chute 34. It's starting to snow more and more.

Next, the operation of the embodiment with the above-described configuration will be explained.

When performing snow removal work, start the engine 14,
By operating the lever 13b of the operation panel 13a, the transformer plate 21 is moved to an appropriate position, and the transformer plate 21 and the friction wheel 22 are brought into contact with each other, so that the rotation of the output shaft 14a of the motor 14 is controlled by the friction wheel. 22 and crawler 1 via gear 23.
The second drive shaft 12a is rotated. And main body 1
The snow removal device is moved to the work place by operating the operation handle 13 extending to the rear of the snow removal device.

Next, the tension pulley 33 is operated via the lever 13c of the operation panel 13a, and the belt 32 is
Give hetension. Then, the rotation of the output shaft 14a, which had been idling until then, is changed to this belt 32.
The rotation of the blower rotation shaft 29a is started, and the rotation of the blower 29 supported by the blower rotation shaft 29a is also started.

The other end of this blower rotating shaft 29a is connected to a fluid coupling 28.
Since the impeller 28a is connected to the impeller 28a, the impeller 28a also rotates at the same time as the blower rotating shaft 29a starts rotating. Then, the oil sealed within the fluid coupling 28 is rotated by the impeller 28a, and the oil is rotated by the impeller 28a through this oil.
The rotation of a is transmitted to the output wheel 28b.

In this case, at the beginning of the rotation of the blower rotation shaft 29a, the rotation speed of the impeller 28a is low and the force for rotating the oil is weak, so the output wheel 28b is not rotated, but the rotation speed of the blower rotation shaft 28a is low. As the oil is gradually raised, the biasing force applied to the oil is also increased, and eventually the output wheel 28b starts to rotate, and after the blower rotating shaft 29a reaches steady rotation, the output wheel 28b starts rotating. The shaft 27 connected to the blower rotation shaft 2
It is rotated at the same speed as 9a.

The other end of the shaft 27 is inserted into a gear box 25b disposed within the auger case 24, and is connected to the auger rotating shaft 25a by, for example, a bevel gear installed inside the gear box 25b. When the auger rotation shaft 25a reaches a steady rotation, the auger rotation shaft 25a rotates at a predetermined rotation ratio, for example 10:1, to the rotation of the shaft 27.
rotated at a ratio of In addition, this auger rotation shaft 2
Since the auger 25 is fixed to the auger 5a, the auger 25 is rotated together with the rotation of the auger rotation shaft 25a.

In this state, when the auger 25 digs into the snow layer to be removed, the snow layer is broken down by the auger 25 and accumulated in the blower housing 26 formed approximately in the center of the auger case 24 on the main body 11 side. . A centrifugal force is applied by the blower 29 rotating within the blower housing 26, and the snow is thrown while being guided by a chute 34 connected to the blower housing 26.

For example, if the snow to be thrown is of equal mass and contains a large amount of moisture, if the rotation ratio of the auger 25 and the blower 29 is constant, the snow accumulated by the auger 25 will be The ability of the blower 29 to throw snow tends to be insufficient relative to its mass.

In this case, the resistance to the auger 25 due to the snow accumulated by the auger 25 increases, and this resistance acts as a load that attempts to prevent the rotation of the auger 25. Then, the torque transmission force of the fluid coupling 28 cannot overcome the load that tries to prevent the rotation of the auger 25, and the rotation of this auger 25 is reduced, and the amount of snow accumulated by this auger 25 is reduced. is reduced.

On the other hand, this reduction in rotation is absorbed by the fluid coupling 28, so the original rotation of the blower 29 is maintained, so the rotation ratio between the blower 29 and the auger is changed from the initial 10:1 to, for example, Ten:
0.5=20:1, and the rotation speed of the blower 29 is increased relative to the rotation speed of the auger.

This state can be explained using a characteristic diagram (Fig. 4) that shows the ratio of the auger rotation speed to the blower rotation speed on the vertical axis and the load on the auger 25 on the horizontal axis. The rotation ratio between the auger 25 and the blower 29 is kept constant, but as the load on the auger 25 is increased, the rotation speed of the blower 29 is relatively increased. By gradually reducing the number ratio, the snow removal action is maintained in accordance with the mass of snow to be removed.

For reference, a case where the blower rotating shaft 29a and the shaft 27 are connected by a mechanical joint with a trich limiter interposed therein is shown in broken lines in FIG. In this case, regardless of the magnitude of the load on the auger 25, the auger 25 is rotated at a constant number of rotations, and a constant amount of snow is accumulated in the direction of the blower housing 26 in accordance with this rotation. For example, snow clogging occurs in the chute 34 at a location shown by . When the load on the auger 25 exceeds a certain level, the torque limiter acts, and the auger 25
is suddenly stopped.

On the other hand, as mentioned above, in the present invention, the blower 2
9 is relatively increased, the occurrence of snow clogging at this hatched area is completely prevented.

In this embodiment, a case has been described in which a single fluid coupling is provided between the blower rotating shaft 29a and the shaft 27, but the number of fluid couplings is not limited to one. It is also possible to have multiple stages.

[Effects of the invention] As explained above, according to the snow removal device of the invention, the rotation ratio between the blower and the auger is automatically changed, so it is possible to avoid, for example, snow clogging in the chute. have an effect.

Furthermore, since the auger and the drive device are connected via a fluid coupling, even if foreign matter gets mixed in and the rotation of the auger is stopped, this stoppage will be absorbed by the fluid coupling. This also has the additional effect that there is no adverse effect on the drive device.

[Brief explanation of the drawing]

1 to 4 relate to an embodiment of the present invention,
Figure 1 is a plan view of the main parts, Figure 2 is a schematic diagram of the drive system,
Figure 3 is an overall view of the snow removal device, Figure 4 is a characteristic diagram showing the ratio of auger rotation speed and blower rotation speed on the vertical axis, and the load on the auger on the horizontal axis, and Figures 5 and 6 are conventional Regarding the technology, FIG. 5 is a schematic diagram of a drive system, and FIG. 6 is a view taken along the - line in FIG. 5. 14...Motor (drive device), 25...Auger,
28...Fluid coupling, 29...Blower.

Claims (1)

[Scope of utility model registration request] A snow removal device in which an auger for accumulation and a blower for snow throwing are each connected to a drive device, characterized in that a fluid coupling is interposed between the auger and the drive device. .