JPS63293208A - Power transmission of snow removing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention enables the A-ga drive system and the
The present invention relates to a power transmission device for a snow blower that can operate both a traveling drive system.

[Prior Art] Generally, in this type of snow blower, while moving the snow blower body forward, an auger is used to break up and collect the snow layer to be removed, and this raked snow is thrown by a blower. There is a so-called two-stage type.

In addition, in this two-stage type snow blower, as disclosed in, for example, Japanese Utility Model Publication No. 51-34111, the traveling drive system and the auger drive system are driven by a single power device such as an engine. There are many things that are done.

That is, as shown in FIG. 5 (schematic diagram), the transformer plate 31a of the traveling drive system 31 is brought into sliding contact with the friction wheel 31b using a running latch lever (not shown) provided on the hand side. When V, the driving force from the output shaft 32a of the engine 32, which is a power device, is transmitted to the axle 31d via the reduction gear 31C, and the crawler 31e is driven.

On the other hand, if you want to avoid driving the auger drive system 33, operate a working clutch lever (not shown) provided at hand, and use the tension clutch 34 connected to this working clutch lever to control the engine 32. The belt 35 connected to the output shaft 32a is tensioned. Then, the driven shaft 33a of the auger drive system 33 connected to this belt 35 rotates, and the blower 33b, which is attached to one sleeve of this driven shaft 33a, and the main shaft 33d of the auger 33c, which is connected to this driven shaft 33a, rotate. rotate together.

Further, when stopping power transmission to the travel drive system 31 and the auger drive system 33, for example, when the vehicle is stopped, both the travel latch lever and the working clutch lever (none of which are shown) are operated.

[Problem 1 to be Solved by the Invention However, the above-mentioned conventional power transmission device for a snow blower has the following problems.

(1) If a foreign object such as a stone or tree gets caught in the auger 33C, or if snow is clogged at the blower's snow-throwing opening, the operator must Therefore, the power transmission of two systems, the travel drive system 31 and the auger drive system 33, must be shut off at the same time, and the operation is complicated.

(2) In particular, if a foreign object is caught in the auger 33G, the snow removal operation must be stopped immediately, but as mentioned above, the power cutoff operation for two systems must be performed at the same time, so the operation It is difficult and time-consuming to deal with the problem quickly.

[Object of the Invention] The present invention was made in view of the above circumstances, and an object of the present invention is to provide a power transmission device for a snow blower that has good operability and can immediately interrupt power transmission in the event of an emergency stop. It is said that

[Means and effects for solving the problems] In the snow blower power transmission 3ffiM arrangement according to the present invention, the main shaft of the auger and the axle of the traveling drive section are connected to one drive 1FllI141, and this drive shaft is further connected to the power transmission 3ffiM. It is connected to the output shaft of the device via a clutch.

That is, when the clutch is connected, power is transmitted from the output shaft of the power device to the drive shaft, and the main shaft of the auger and the axle of the traveling drive unit, which are connected to the drive shaft, rotate together. On the other hand, when the clutch is separated, the transmission of power to the auger and the travel drive section is simultaneously interrupted.

[Embodiment 1 of the invention Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 4 show one embodiment of the present invention, FIG. 1 is a side view of the snow blower, FIG. 2 is a schematic plan view of the power transmission device of the snow blower, and FIG. 3 is the same as that of FIG. 4 is a side view of the snow blower during snow removal.

Reference numeral 1 in the figure is a snow blower body, and an engine 2 is mounted on the snow blower body 1, and a handle 4 is fixedly attached to the rear thereof.

Further, an auger case 5a that opens at the front is fixedly installed at the front of the snow blower main body 1, and a main shaft tube 6a of an auger 6 is supported on this auger case 5a. Further, a drive shaft 24 is rotatably inserted and supported through the main shaft tube 6a via a bearing 25. Further, one end of the main shaft tube 6a protrudes from one side of the auger case 5a, and a clutch plate 6b is integrally formed on the end surface thereof.

On the other hand, both ends of the drive shaft 24 protrude from the main shaft pipe 6a, and a dog clutch main body 27 that can be freely engaged and disengaged from the clutch plate 6b is attached to a spline in the middle of the drive shaft 24 that protrudes from the clutch plate 6b side. In addition to being coupled, the driven pulley 11bl* is also attached.

Furthermore, this driven pulley 11b and the engine 2
between the drive pulley 11a, which is connected to the output shaft 28a of the transmission 28, and the drive pulley 11a connected to the output shaft 2a of the transmission 28,
A belt 12 is stretched. In addition, the code|symbol 13 is a tension clutch.

Further, a drive and a nion 29 are pivotally attached to both ends of the drive shaft 24. Roughly speaking, this drive pinion 29 is the crawler sprocket 14 that constitutes the travel drive section 14.
It is meshed with #14b of #a. An axle 30 on which the crawler sprocket 14a is mounted is rotatably supported on the side surface of the auger case 5a or on the frame of the snow remover main body 1.

On the other hand, an idler 14C is supported on both sides of the rear of the snow blower main body 1, and a crawler 3 is stretched between the idler 14c and the 0-lase prokerato 14a.

The gear change operation of the transmission 28, the disengagement/engagement operation of the tension clutch 13, and the Ii/engagement operation of the dog clutch main body 27 are performed by the handle 4.
Shift lever 20 arranged on the side, latch lever 2 for running
1 and the working clutch lever 22, which are operated by the latch lever 21 which is normally used for running.
is in an open state, and the tension clutch 13 is in a disconnecting operation. Note that the reference numeral 23 is an accelerator lever.

Further, both sides 5b of the opening of the auger case 5a that covers the auger 6 are overhanged to the front of the crawler 3, and the entire width of the machine body including the portion of the crawler 3 protruding from the snow blower main body 1 is Snow removal width is ensured.

On the other hand, a blower housing 5C is connected to the rear center of the auger case 5a.
A blower 7 is rotatably housed therein, and a driven shaft 9 on which the blower 7 is mounted is connected to an auger mission 10 connected to the main shaft pipe 6a of the auger 6. Note that the reference numeral 9a is a coupling.

Further, a chute 8 is mounted and fixed on the snow throwing opening 5d of the blower housing 5C, and the chute 8 is rotatable through a set angle via a chute handle 26 attached to the handle 4.

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

(Driving) After starting the engine 2 and setting the accelerator lever 23 to the high-speed side, grasp the latch lever 21 provided on the handle 4 for driving.
The tension clutch 13 connected to the drive pulley 1
Belt 1 stretched between 1a and driven pulley 11b
Make 2 nervous. Then, the driving force from the engine 2 is transmitted to the belt 12 through the output shaft 2a1 transmission 28 and the output shaft 28a of this transmission 28.
The signal is then transmitted to the drive shaft 24 which connects the driven pulley 11b.

As a result, the drive pinion 29 rotatably attached to both ends of the drive shaft 24 rotates, and the drive pinion 29
Then, the crawler sprocket 14a, which is inscribed through the internal teeth 14b, rotates while being supported by the wheel @30, and the friction becomes 0-
The snow removal machine main body 1 moves forward or backward as the O-ra 3 is stretched around the lasprokerato 14a and rotates.

In addition, a gear shift lever 20 provided on the handle 4
When operated, the gear ratio of the transmission 28 is varied, and the speed of the snow blower main body 1 is variably set.

(Snow Removal) Also, when the working clutch lever 22 provided on the handle 4 is operated, the dog clutch main body 27 connected to the working clutch lever 22 is connected to the drive shaft to which the dog clutch main body 27 is spline-coupled. 24, and engages with a clutch plate 6b formed at one end of the main shaft tube 6a of the auger 6 through which the drive shaft 24 is inserted and supported.

Then, a part of the four rotation force of the drive shaft 24 is transferred to the main shaft pipe 6.
a, and the auger 6 rotates. At the same time, the blower 7, which is pivotally attached to the driven shaft 9 connected to the main shaft pipe 6a via the auger mission 10 and the coupling 9a, rotates.

In this state, when the snow blower main body 1 is moved forward and the opening of the auger case 5a is moved to the snow layer to be removed, first, the opening ends of both sides 5b of the auger case 5a bite into the snow layer. The snow on both sides is shoveled into the auger 6 housed in the auger case 5a. the result,
A snow removal width corresponding to the entire width of the snow remover body 1 including the crawlers 3 provided on both sides of the snow remover body 1 is ensured.

Next, the auger 6 housed in the auger case 5a bites into the snow layer, breaks it up, collects the snow in the center, and blows the snow upwards by a blower 7 disposed behind it. The blown snow is then thrown laterally along the chute 8 from a snow throwing opening 5d formed in the blower housing 5C that covers the blower 7.

By the way, since the crawler sprocket 14a that drives the crawler 3 and the auger 6 are arranged approximately coaxially, the position where the auger 6 bites into the snow layer is approximately the same as the position of the crawler 3. As shown in FIG. 4, when the snow layer is relatively high and it is difficult to remove the snow at once, when the snow remover main body 1 is moved forward, the crawler 3 moves along the slope of the unremoved snow layer. Let's rise along the trail.

On the way up along the slope of this unplowed snow layer,
The front part of the separate snow removal main body 1 digs into the snow due to its own weight,
Snow will be removed from this slope as shown by the hatching in the diagram.

As a result, even if the snow layer exceeds the snow removal ability, the snow can be removed to some extent with ease.

In addition, after removing snow from the slope of the snow layer as shown by the dashed line in the figure, the snow blower body 1 is moved back and forth, and then the snow is removed along the diagonal line shown by the dashed line, and this process is repeated several times. ,
The slope of the unsnow layer gradually becomes gentler, and as a result,
This means that snow can be removed even if the snow layer exceeds the snow removal capacity.

(Emergency stop) In addition, if an abnormality occurs such as when a foreign object such as a stone or tree is caught in the auger 6 or the crawler 3, the travel tardge lever 21 of the handle 4
Solve the gripping force for . Then, the tension clutch 13 connected to the moving latch lever 21 is connected to the belt 12.
The belt 12 is separated from the belt 12 and the pressing force on the belt 12 is released.
This belt 12 is relaxed.

Then, the output shaft 2a of the engine 2 idles, and the drive IJ connected to the output shaft 2a via the belt 12
The rotation of the J-axis 24 stops, and the auger 6 and blower 7
, and the crawler 3 stop at the same time. As a result, the snow blower main body 1 can be stopped immediately in an emergency, and damage to the auger 6, the crawler 3, etc. can be prevented.

Moreover, the safety measure 4F is also preferable, since if the operator leaves the handle 4, the tension clutch 13 will perform a disconnection operation, and the rotation of the auger 6, blower 7, and crawler 3 will definitely stop.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the axle of the travel drive unit may be directly connected to the drive shaft.

Alternatively, a tie A7 may be attached to the axle, and the snow removal machine body may run through the tie A7.

In addition, other means such as a chain and a sprocket may be used for power transmission, and in this case, a friction clutch may be interposed on the output shaft 2a of the engine 2, etc., and the driving force may be switched on/off using this friction clutch.

[Effect of the Invention 1] As explained above, according to the present invention, the main shaft of the auger and the axle of the travel drive unit are connected to one drive shaft, and this drive shaft is further connected to the output shaft of the power unit via a clutch. Since the clutch is connected to the auger, when the clutch is disconnected, power transmission to the auger and the travel drive section is simultaneously stopped. Therefore, in the event of an emergency, snow removal work can be stopped immediately, and if the auger, traveling drive, etc.
Not only does this have an excellent effect of preventing zero errors, but also the reliability of the product is greatly improved.

In addition, since snow removal work can be immediately stopped in one step, operability is good.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, FIG. 1 is a side view of the snow blower, FIG. 2 is a schematic plan view of the power transmission device of the snow blower, and FIG. 3 is the same as that of FIG. 4 is a side view of the snow blower during snow removal, and FIG. 5 is a schematic plan view of a power transmission device of a conventional snow blower. 2... Power device (engine), 2a... Output shaft, 6
... Auger, 6a ... Main shaft pipe, 13 ... Clutch (tension clutch), 14 ... Travel drive unit, 24
... Drive IJ axis, 30... Axle.

Claims (1)

[Claims] Power transmission for a snow blower characterized in that the main shaft of the auger and the axle of the travel drive unit are connected to one drive shaft, and this drive shaft is further connected to the output shaft of the power unit via a clutch. Device.