JPS6344888B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for preventing damage to an auger in a snow blower due to pebbles mixed in snow being caught between the auger and the auger cover. .

[Conventional technology]

An auger-type snow blower, which is known as a type of snow blower, has an auger shaft that is pivoted on the machine side perpendicular to the direction of movement of the machine, and a plurality of blades that are fixed to the center of the auger shaft. The auger consists of a blower with a circular shape, and spiral blades located on both sides of the blower and fixed to the auger shaft. It is covered with a half-shell-shaped auger cover formed by a plate. Then, as the machine moves forward while rotating the auger, the snow is scraped up towards the central blower by the spiral action of the blades on both sides of the auger, and is then scraped up by the blower blades and discharged from the snow pipe to the outside of the machine. .

[Problem to be solved by the invention]

However, with such conventional snow blowers, when performing snow removal work on unpaved roads such as farm roads, if pebbles are mixed in the snow, the lower edge of the opening of the auger cover, which is the outer peripheral entry side of the rotating auger, These pebbles often get caught between the auger blades and blades, causing problems such as breakage of the auger blades or blade edges and deformation of the auger cover.

[Means to solve the problem]

In order to solve such problems, in the present invention, the lower end of the outer circumference covers the rear half of the auger that rotates in the rearward direction, and the back plate of the half-body-shaped auger cover is connected to the fixed plate of the upper half and its lower end. It is divided into an opening/closing plate pivotally supported on the edge so that it can be opened and closed, and a spring member is provided to bias the opening/closing plate in the closing direction.

[Operation] When clearing snow while traveling on a road where pebbles are mixed, pebbles may become caught between the outer periphery of the auger vane or blade and the auger cover.
At this time, the auger vanes and blades rotate, and the auger cover is equipped with an opening and closing plate that is biased in the closing direction. Or, since the outer peripheral edge of the blade has a spiral shape, it is rotated by the inward movement of the outer peripheral edge due to rotation and the biasing force of the opening/closing plate. , the opening/closing plate is pushed forward or outward by the return force of the spring member. Incidentally, the pebbles that have been scraped into the auger cover by the blades or vanes of the auger are discharged from the snow shovel to the outside of the machine along with the snow.

〔Example〕

1 to 6 show an embodiment of the pebble removal device according to the present invention, FIG. 1 is a side view of a snow blower implementing this, and FIG. 2 is a rear view of the snow removal device with the auger removed. 3 is a perspective view similarly seen from the front, FIG. 4 is a vertical sectional view of the main parts of the snow removal device, FIG. 5 is a front view, and FIG. 6 is an auger outer circumference shown for explaining the operation FIG. 3 is a side view of the vicinity of the opening and closing plate. In these figures, a snow remover 1 is comprised of a drive vehicle 2 and a snow removal device 3 detachably connected to the drive vehicle 2. The drive wheel 2 includes a pair of left and right connecting plates 4, an oval-shaped conduction case 5 attached to one of the connecting plates 4, and a U-shaped frame 6 in plan view that connects the other connecting plate 4 and the conductive case 5. An engine 8 is mounted on a base 7 integrally formed at the rear end of the frame 6. Furthermore, a handle 9 for steering the machine is provided on the left and right connecting plates 4, projecting diagonally rearward.
An operating device including a traveling clutch lever 10 and the like is attached to the handle 9. Further, an input shaft 11 is pivotally supported at the upper end of the transmission case 5 and is drivingly connected to the engine 8 through a belt. The power is transmitted to the axle 13 at the lower end of the transmission case 5 via a transmission in the transmission case 5, and in the drive vehicle 2, which is a unicycle, one drive wheel 14 is pivotally attached to the center of the axle 13. Furthermore, a pair of upper and lower notches are provided at the front ends of the left and right connecting plates 4, and an L-shaped lever 16 is provided in the center with a rotational force applied clockwise in the figure by a tension spring 15. is pivoted.

On the other hand, the snow removal device 3 includes a connecting frame 17 formed in a U-shape when viewed from the rear at its rear end, and pins 18 are attached to two positions above and below the connecting frame 17 . This pin 18 is engaged with the notch of the connecting plate 4, and the L
By holding the lower pin 18 with the lever 16, the drive wheel 2 and the snow removal device 3 are configured to be detachably connected. Furthermore, connection frame 1
7, four stays 19 are provided to protrude forward, and a bearing (not shown) provided upright on the upper stay 19 has an auger drive shaft connected to the input shaft 11 by a belt. 20 is pivotally supported.
The driving vehicle 2 and the snow removal device 3 are attached and detached by attaching and detaching the belt between the shafts 11 and 20 together with the belt cover 21.

Further, an auger cover 22 (described in detail later) is attached to the front end portions of the four stays 19, and is formed in the shape of a half body and opens toward the front, concentric with the auger 50 whose side view will be described later. The auger drive shaft 20 is attached to the auger bearings 23 fixed on both side plates.
The auger shaft 24 is drivingly connected by a chain between
is rotatably supported. This auger shaft 24
An auger 50 integrally formed with a blower 25 and spiral blades 26 (hereinafter referred to as blades 26) on both sides of the blower 25 is pivotally attached to the auger 50. That is, the auger in the present invention refers to a rotating body formed by the blower 25 and the spiral blade 26. The blower 25 of the auger 50 includes a pair of left and right arms 25a projecting from the auger shaft 24 in a cross shape, and four blades 2 that connect the tips of the cross to the left and right, respectively.
5b, and rotates in the direction shown by arrow A in FIG. The blades 25b are formed in an arc shape so that the center part lags behind the direction of rotation so that the thrown snow does not scatter, and the outer end is inclined so that it lags behind the direction of rotation than the inner end. ing. In addition, the left and right blades 26
are disposed on both sides of the blower 25, with one end fixed to a fixed plate 26a on the auger shaft 24, and the other end fixed to the tip of the arm 25a of the blower 25. Two spiral plates 26b each have a semicircular arc shape when viewed from the side and a spiral shape as a whole.
Each one is equipped with one. These spiral plates 26b are 2
They are arranged facing each other to form a circular shape.
The spiral direction and the inclination direction are set so that the snow is scraped toward the blower 25 by rotation in the direction of arrow A, that is, in the direction in which the lower end of the outer periphery faces rearward. Further, the left and right blades 26 are formed symmetrically with respect to each other. In addition, the auger 50 mentioned above
Sprocket 27 that stretches the drive chain
is provided between the blade 26 and the auger bearing 23 on one side.

The auger cover 22, which covers the rear half of the auger 50, is formed into a half-shell shape as a whole, with semicircular side plates on both sides and a back plate that connects the arcuate edges of the side plates, and the back plate covers the upper half of the auger cover 22. It is divided into a fixing plate at the lower half and an opening/closing plate 28 at the lower half, which are formed separately. The opening/closing plate 28 has an opening/closing shaft 29 fixed to its upper end.
is formed so that it can be opened and closed freely by being pivotally supported on a bearing 30 on the fixed plate side, and between the head of the pin 31 implanted on the fixed plate side and the spring receiver 32 integrally formed on the opening/closing plate 28 side. It is biased in the closing direction by a compression coil spring 33 as a spring member interposed therein. Further, the tip of the opening/closing plate 28, that is, the lower edge of the opening of the auger cover 22 is located close to the outer periphery of the auger 50, and this end is reinforced by a reinforcing plate 34. Further, the upper edge of the opening of the auger cover 22 is reinforced by an L-shaped steel 35.

At the lower end of the side plate of the auger cover 22 configured in this manner, a pair of left and right sleds 36 having forward-facing arc-shaped sharp ends are attached.
From the mounting part of the auger bearing 23, an arm 3 equipped with an inclined snow cutting plate 37 spanning the entire width of the machine at its tip.
8 is horizontally protruding. Furthermore, a cylinder 3 communicating with the blower 25 is provided on the upper surface of the auger cover 22.
9 is integrally formed, and a snow removal tube 40 is rotatably joined to this cylinder 39. This snow removal tube 40 has a U-shaped cross section and an arc shape when viewed from the side, and is configured so that the degree of curvature can be adjusted by dividing it in the center and joining it with a hinge 41. ing. Furthermore, the tip of a rotating lever 43 is pivotally attached to a rotating arm 42 attached to the snow removing tube 40, and the tip of a rotating lever 43 is pivotally attached to the rotating arm 42 attached to the snow removing tube 40.
By rotating the snow removal direction, the direction of snow removal can be adjusted. Further, after adjustment, the rotary lever 43 is fixed by a receiving rubber 45 at the upper end of the lever receiver 44 provided upright on the connecting frame 17.
The operation of the snow remover configured as above will be explained. First, to connect the snow removal device 3 to the drive vehicle 2,
When the handle 9 is gripped and the drive wheel 2 is tilted so that the front part is lowered, and the inclined plate 4 is engaged with the connecting frame 17 of the snow removal device 3, the pin 18 is inserted into the notch of the connecting plate 4 and the L-shaped lever. 16. Thereafter, a belt is stretched between the input shaft 11 and the auger drive shaft 20, and the belt cover 21 is attached to complete the connection. Then, when the engine 8 is started, the machine is moved to the snow cutting plate 37 provided at its front end.
We move forward while pushing through the fresh snow. Also,
If there is a hard layer of snow under the fresh snow, use the snow cutting board 3.
7 comes into contact with this, the front part of the machine rises due to the action of the slope, and from then on, the thickness of the snow removal layer is kept constant as the snow cutting plate 37 slides on the upper surface of the snow layer. maintained.

When the machine is advanced in this way, the sled 36
The blade 26 of the auger 50 and the blower 25 rotate together in the direction of arrow A, and the snow is crushed by the blade 26, and its spiral action causes the blower to 2
It is pushed towards the 5th side. The shoveled snow is scooped up by the blades 25b of the blower 25 in the direction of the snow pipe 40, and is thrown outside from the opening of the snow pipe 40. In this case, since the blades 25b of the blower 25 are formed in an arc shape and are inclined, snow can be scooped up smoothly and snow is not scattered during snow removal. In addition, the throwing direction is snow shovel 4
This can be freely selected by adjusting the degree of curvature of 0 and adjusting the rotation using the rotation lever 43.

In the snow removal work described above, pebbles are mixed in the snow as described above. For example, if a car runs with chains wrapped around its tires while the amount of snow is still low, pebbles on the ground will be thrown onto the snow layer, and if there is more snow on top of that, pebbles will be thrown into the layer above the ground. Mixed. If snow removal work is performed in such conditions, the pebbles 46 in the snow will be removed by the blower 2.
It may get caught between the tip of the blade 25b or the outer peripheral edge of the blade 26 and the lower edge of the opening of the auger cover 22. However, at this location, the opening/closing plate 28 is biased in the closing direction by the compression coil spring 33 so that it can be opened and closed freely, and the blower 25 and blades 26 are rotating in the direction of arrow A. The trapped pebbles 46 are pushed into the auger cover 22 or pushed out of the auger cover 22 by the action described below.

Figures 6 a ₁ to _{c 3} are diagrams for explaining the operation when a pebble 46 is caught between the blade 25a of the blower 25 and the opening/closing plate 28, dividing it into large and small biting depths of the pebble 46. It is. First, when the pebble 46 is deeply bitten as shown by the solid line in _FIG . After standing up, the pebble 46 is pushed into the auger cover 22 by the continuously rotating blade 25b while opening the opening/closing plate 28 against the spring force, as shown in FIG. _6a2 . As the blade 25b continues to rotate further, the opening/closing plate 28 closes due to the spring force as shown in FIG. _6a3 , and the pebble 46 moves to the position shown by the dotted line in the figure.
The snow is discharged from the snow shovel 40 to the outside of the machine along with the snow.

Next, when the biting depth of the pebble 46 is medium as shown in _FIG .
As shown in Fig. _6b2 , the opening/closing plate 28 is opened and rotated clockwise around the tip of the opening/closing plate 28, as shown in Fig. 6b2. When the blade 25b further rotates as shown in ₃ , the pebble 46 is pushed out of the auger cover 22 by the return force of the opening/closing plate 28 in the closing direction. After this, as shown in Fig. 6 b ₄ , the pebbles 46 pushed forward mix with the snow, and the next rotating blade 25
It is scratched by b.

Next, when the pebble 46 is shallowly bitten as shown in _FIG . As the blade 25b is pushed, as shown in Fig. _6c2 , when the blade 25b moves further, the pebble 4
6 is rotated clockwise in the figure while opening the opening/closing plate 28, and then pushed forward by the biasing force of the opening/closing plate 28 in the closing direction, as shown in FIG. _6c3 .
The pushed out pebbles 46 mix with the snow and are scraped in by the next rotating blade 25b.

On the other hand, the pebbles 46 caught between the outer peripheral edge of the blade 26 and the tip of the opening/closing plate 28 are removed from the blade 26.
Since the outer circumferential edge of the blade 26 has a spiral shape, the outer circumferential edge of the blade 26 moves inward as the blade 26 rotates.
8 and rotates on its own axis in the same principle as the blade 25b, and is pushed outward by the return force of the opening/closing plate 28 by the compression coil spring 33. In addition, the pebbles 46 that are directly scraped into the auger cover 22 by the vanes 25b and blades 26 are
The snow is discharged from the snow shovel 40 to the outside of the machine along with the snow.

In this embodiment, a compression coil spring 33 is used as a spring member for biasing the opening/closing plate 28 in the closing direction, but a lever may be provided on the opening/closing shaft 29 and pulled by a tension spring, or a leaf spring or the like may be used. may also be used.

〔Effect of the invention〕

As is clear from the above description, in the snow blower according to the present invention, the lower end of the outer periphery is connected to the back plate of the auger cover that covers the rear half of the auger that rotates in a rearward direction, and the fixed plate of the upper half and its lower edge. The opening/closing plate is divided into a lower half opening/closing plate which is pivotally supported to open and close freely, and a spring member is provided to bias the opening/closing plate in the closing direction.
During snow removal work, pebbles that are mixed in the snow and caught between the auger's blow blade or blade and the lower edge of the opening of the auger cover are rotated by the movement of the moving blade or blade and the biasing force of the opening/closing plate. After that, the rotation of the auger and the elastic return force of the opening/closing plate will release it from the jamming and push it into the auger cover or push it out.
Damage to the machine base, such as breakage of the auger tip or deformation of the auger cover, can be prevented.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the pebble removal device in a snow blower according to the present invention, FIG. 1 is a side view of the snow blower implementing this, and FIG. 2 is a side view of the snow blower with the auger removed. Perspective view from rear, 3rd
The figure is also a perspective view seen from the front, Figure 4 is a longitudinal sectional view of the main parts of the snow removal device, Figure 5 is a front view, and Figure 6 is a front view.
Figures _a1 to _c3 are side views of the vicinity of the auger outer circumference and the opening/closing plate shown for explaining the operation. DESCRIPTION OF SYMBOLS 1... Snow blower, 3... Snow removal device, 22... Auger cover, 25... Blower, 25a... Arm, 25b... Vane, 26... Blade, 26b... Spiral plate, 28...
Opening/closing plate, 33... compression coil spring, 40... snow removal tube,
50...Ogre.

Claims (1)

[Claims] 1 It is formed by a blower having a plurality of blades and spiral blades on both sides of the blower, and the central axis is pivotally supported on the aircraft body side, and the lower side of the outer end orbit of the blades and blades is rotationally driven in the direction toward the rear. An auger cover that is formed into a half-body shape that opens forward and covers the rear half of the auger, and an auger cover that covers the rear half of the auger, and a back plate that connects the semicircular side plates and the arcuate periphery of the auger. In a snow blower equipped with a snow removal device consisting of a snow removal tube joined to a 1. A breakage prevention device for an auger in a snow blower, characterized in that the opening/closing plate is divided into two plates, and a spring member is provided for biasing the opening/closing plate in a closing direction in which the front end approaches the outer periphery of the auger.