JP4323254B2 - Working machine - Google Patents

Description

  The present invention relates to a work machine, and more particularly to a work machine in which a vertical engine of a type in which a crankshaft is placed vertically is arranged above a machine body and a clutch mechanism is housed in the machine body.

2. Description of the Related Art Among work machines, there is known a snow remover that mounts an engine crankshaft vertically on a machine body and transmits the driving force of the engine to the auger to drive the auger (see, for example, Patent Document 1).
Japanese Utility Model Publication 61-24573

FIG. 9 is a reproduction of the diagram of Patent Document 1. However, the sign has been changed.
In the snowplow 200, an engine 202 is placed on a machine body 201 with a crankshaft (not shown) placed vertically, an auger 203 is attached to the lower part of the machine body 201 below the engine 202, and a snow plate 204 is placed behind the auger 203. The handle 205 is extended from the rear part of the machine body 201 to the rear.

By driving the engine 202 of the snowplow 200, the driving force of the engine 202 is transmitted to the auger 203 via a power transmission mechanism (not shown), and the auger 203 is rotated.
By rotating the auger 203, the snow is scraped to the center by the auger 203, and the snow scraped to the center is discharged to the left and right by the snow discharge plate 204.

By the way, since this snow remover 200 uses a vertical engine as the engine 202, the crankshaft is placed vertically and the lower end portion of the crankshaft is housed in the airframe.
In order to connect the crankshaft to the auger 203, the lower end of the crankshaft is connected to the auger 203 via a power transmission mechanism. For this reason, it is necessary to store the power transmission mechanism in the airframe 201.

This power transmission mechanism includes a clutch mechanism (not shown), and switches between a state where the auger 203 is connected to the engine 202 and a state where the auger 203 is disconnected from the engine 202 by the clutch mechanism.
However, the clutch mechanism is a member that generates heat by frictional heat or energization. When the clutch mechanism is housed in the machine body 201, heat generated from the clutch mechanism may accumulate in the machine body 201.

  An object of the present invention is to provide a work machine capable of suitably releasing heat generated from a clutch mechanism in a work machine equipped with a vertical engine.

According to a first aspect of the present invention, there is provided a vertical engine of a type in which a work device and a traveling device are provided on a fuselage, and a crankshaft is vertically disposed above the fuselage, and a clutch is disposed below the vertical engine and in the fuselage. In a working machine that disposes a mechanism and transmits the output of the crankshaft to a working device or a traveling device via a clutch mechanism, a plurality of bosses are installed upright at the upper part of the machine body and surrounding the clutch mechanism. By attaching the vertical engine to the boss, a first space is formed between the vertical engine and the body, and a cover body that covers the vertical engine is attached to the body, and the cover body is covered with the cover body and the cover body A second space is formed between the generator and the bottom surface by attaching the generator to the bottom surface of the generator. Characterized by comprising a power transmission means for connecting the crankshaft and the drive shaft of the generator by using the first space and the second space.

A plurality of bosses were set up on the upper part of the fuselage at a position surrounding the clutch mechanism, and a vertical engine was attached to these bosses to form a space between the vertical engine and the fuselage.
Thus, by forming a space between the vertical engine and the fuselage, it is possible to release (release) heat generated from the clutch mechanism from the space.
As a result, the ambient temperature of the clutch mechanism can be suitably maintained and the clutch mechanism can be used for a long time.

  The invention according to claim 1 is advantageous in that the use of the clutch mechanism over a long period of time makes it possible to operate the snowplow for a long period of time and further enhance the usability.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Hereinafter, a snow remover will be described as an example of a work machine, but the work machine is not limited to this. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view showing a snow removal machine (work machine) according to the present invention.
The snow remover 10 as a work machine is attached with electric motors (not shown) for traveling on the lower left and right sides of the transmission case (machine body) 11, and the traveling device 13 is connected to the left and right electric motors. The engine 14 is attached to the upper part, a snow removal device (working device) 15 driven by the engine 14 is attached to the front part of the transmission case 11, the rear part of the snow removal device 15 and the engine 14 are covered with a cover body 18, and the upper part of the transmission case 11 The left and right operation handles 21, 22 are extended rearward and upward, the operation panel 23 is attached between the left and right operation handles 21, 22, and the operator holds the grips 24, 25 of the left and right operation handles 21, 22. This is a self-propelled walking type work machine that is taken from behind the board 23.

The traveling device 13 includes a left traveling unit 26 outside the left electric motor (not shown) and a right traveling unit 26 outside the right electric motor (not shown). Since the left and right traveling units 26 and 26 are the same constituent members, the same reference numerals are given and the description of the left traveling unit 26 is omitted.
The right traveling unit 26 includes a right drive wheel 27 connected to the right electric motor, a right idler wheel 28 is rotatably provided behind the drive wheel 27, and the right drive wheel 27 and the idler wheel 28 are rotated. A crawler belt 29 on the left side is wound around the belt.
The snow removal device 15 is composed of an auger portion 16 and a blower portion 17.

According to the snowplow 10, the left and right crawler belts 29 and 29 are rotated by driving the left and right electric motors and driving the left and right drive wheels 27 and 27 with the left and right drive motors. The snow removal machine 10 travels by rotating the left and right crawler belts 33.
In this state, the snow removal device 15, that is, the auger portion 16 and the blower portion 17 is driven by the engine 14 to perform snow removal work.

  The cover body 18 includes an upper cover portion 31 and a lower cover portion 32. The lower cover portion 32 covers the bottom surface of the engine 14, and the upper cover portion 31 covers the upper portion of the engine 14 to cover the engine 14 as a whole. It is comprised as follows.

FIG. 2 is a side view showing a state in which the engine of the snowplow according to the present invention is attached to the fuselage.
Four mounting bosses (bosses) 35 (see also FIG. 3) are provided on the upper part 34 of the transmission case 11, and the engine 14 is mounted on these four mounting bosses 35.・ ・ Install the engine 14 with bolts 36.
The engine 14 is a vertical engine (hereinafter referred to as “engine”) that extends downward by placing a crankshaft (output shaft) 41 vertically, and a cylinder in which a piston (not shown) reciprocates. The part 37 is directed to the rear of the machine body, and the front surface 38 of the engine 14 is disposed behind the snow removal device 15.

An electromagnetic clutch (clutch mechanism) 52 is disposed below the engine and in the transmission case 11 (see also FIGS. 3 and 4). When the engine 14 is driven, the output of the crankshaft 41 is transmitted to the snow removal device 15 (see FIG. 1) via the clutch mechanism 52.
That is, by driving the engine 14, the rotation of the crankshaft 41 is transmitted to the pinion 44 of the work output shaft 43 via the electromagnetic clutch 52, and the rotation of the pinion 44 is transmitted to the transmission shaft 46 via the bevel gear 45. The rotation of the shaft 46 is transmitted to the auger portion 16 and the blower portion 17 (see FIG. 1) of the snow removal device 15.
An air cleaner 47 is provided at the right rear portion of the engine 14, and a carburetor 48 is provided between the air cleaner 47 and the engine 14.

FIG. 3 is a perspective view for explaining the mounting relationship between the transmission case and the engine according to the present invention.
A storage recess 51 is formed in the upper part 34 of the transmission case 11, and the electromagnetic clutch 52 is stored in the storage recess 51.
In the upper part 34 of the transmission case 11, a plurality (four as an example) of mounting bosses 35 are erected around the storage recess 51 so as to surround the electromagnetic clutch 52.

On the other hand, the engine 14 is provided with four projecting portions 54... (Only two are shown) at portions corresponding to the four mounting bosses 35. Attaching holes 54a ... corresponding to the screw holes 35a ... of the mounting bosses 35 ... are formed in the respective overhanging portions 54 ....
The engine 14 is mounted on the four mounting bosses 35 by inserting the bolts 55... Into the mounting holes 54 a and screwing the inserted bolts 55 into the screw holes 35 a.

Of the four mounting bosses 35, a front mounting portion 56 is provided in the vicinity of the mounting boss 35 disposed on the right front side, and a rear mounting portion 57 is provided in the vicinity of the mounting boss 35 disposed on the right rear side.
The front mounting bracket 61 (see also FIG. 4) is bolted to the front mounting portion 56, and the rear mounting bracket 62 (see also FIG. 4) is bolted to the rear mounting portion 57, and the front and rear mounting brackets 61 and 62 generate power. The machine 63 is fixed with bolts 64 and 64.

FIG. 4 is a cross-sectional view showing the main part of the snowplow according to the present invention.
The lower cover portion 32 of the cover body 18 is attached to the upper portion 34 of the transmission case 11, the overhanging portion 54 of the engine 14 is attached to the mounting boss 35 of the transmission case 11 with bolts 155, and the crankshaft. The input side of the electromagnetic clutch 52 is attached to the lower end of 41, the work output shaft 43 is attached to the output side of the electromagnetic clutch 52, and the pinion 44 of the work output shaft 43 is engaged with the bevel gear 45 of the transmission shaft 46.

By attaching the projecting portions 54 of the engine 14 to the mounting bosses 35 of the transmission case 11, the lower end surface 65 of the engine 14 can be lifted from the upper portion 34 of the transmission case 11 by a distance H. Thereby, a space (first space) 67 is formed between the upper portion 34 of the transmission case 11 and the engine 14.
Further, the generator 63 is mounted so as to float from the bottom surface portion 66 of the lower cover portion 32, similarly to the engine 14. Thereby, a space (second space) 68 is formed between the bottom surface portion 66 of the lower cover portion 32 and the generator 63.

Power transmission means 72 (a drive pulley 73, a driven pulley 74, and a drive belt 75) for connecting the crankshaft 41 and the drive shaft 71 of the generator 63 is provided using these spaces 67 and 68.
As a result, the crankshaft 41 of the engine 14 is connected to the drive shaft 71 of the generator 63 via the power transmission means 72.

Therefore, by driving the engine 14, the rotation of the crankshaft 41 is transmitted to the drive shaft 71 via the power transmission means 72 and the drive shaft 71 is rotated. By rotating the drive shaft 71, electric power is generated by the generator 63, and the left and right electric motors (not shown) are driven by the generated electric power.
The power obtained by driving the left and right electric motors is transmitted to the traveling device 13 shown in FIG. Thus, the left and right traveling units 26 and 26 (see FIG. 1) of the traveling device 13 are driven to cause the snowplow 10 shown in FIG. 1 to travel.

FIG. 5 is an exploded perspective view showing an air cleaner and a vaporizer of the snowplow according to the present invention.
A carburetor 48 is attached to the right rear portion of the engine 14 via a pair of bolts 77, 77, an air cleaner 47 is attached to the carburetor 48 via a pair of bolts 77, 77, and nuts 78, 78 are fastened to the bolts 77, 77. .
Air is sucked from the inlet 81 of the air cleaner 47 as shown by the arrow, and the sucked air is guided from the outlet 82 to the inlet 83 of the carburetor 48 through the filter (not shown) as shown by the arrow.

An oil supply hose 86 is extended from the oil supply joint portion 85 of the carburetor 48, this oil supply hose 86 is connected to a fuel tank 87 (see FIG. 1), and the float chamber drain joint portion 88 (see FIG. 6) is located above the oil supply hose 86. A float chamber drain hose 89 (hereinafter referred to as a “float chamber drain hose 89”) is extended from the float chamber drain joint portion 88, and the tip end 89a of the float chamber drain hose 89 is placed under the bar portion. 32 first connecting portions 91 are inserted.
The first connecting portion 91 is formed integrally with the bottom surface portion 66 of the lower cover portion 32.

Further, an overflow drain joint portion 93 (see also FIG. 6) is provided above the float chamber drain hose 89 of the vaporizer 48. ("Overflow drain hose 94") is extended, and the tip end portion 94a of the overflow drain hose 94 is inserted into the lower or second connection portion 95 of the bar portion 32.
The second connecting portion 95 is provided on the bottomed convex portion 97. The bottomed convex portion 97 is a member that protrudes upward from the bottom surface portion 66 of the lower cover portion 32 (cover body 18).

That is, the bottomed convex portion 97 is formed by extending a hollow cylinder having a rectangular cross section upward from the bottom surface portion 66, forming the bottom portion 106 at the upper end, and forming the second connecting portion 95 at the bottom portion 106, The lower end is opened (see FIG. 6).
The vaporizer 48 includes a solenoid valve 98 that opens and closes the fuel flow path.

FIG. 6 is a side view showing the vaporizer of the snowplow according to the present invention.
The first connecting portion 91 is a member extending in the vertical direction on the bottom surface portion 66 of the lower cover portion 32. Specifically, in the first connecting portion 91, the upper half portion 101 projects upward from the bottom surface portion 66 of the lower cover portion 32, and the lower half portion 102 faces downward from the bottom surface portion 66 of the lower cover portion 32. It is a protruding hollow cylinder having a lower end surface 103 inclined.

The distal end portion 89 a is connected to the first coupling portion 91 by inserting the distal end portion 89 a of the float chamber drain hose 89 into the hollow portion in the first coupling portion 91.
As a result, the leading end 89a of the float chamber drain hose 89 is connected to the bottom surface portion 66, and the discharge port of the leading end portion 89a is disposed below the bottom surface portion 66 of the lower cover portion 32 through the hollow portion of the first communication portion 91. Let it come.

  By providing a bottomed convex portion 97 protruding upward on the bottom surface portion 66 of the lower cover portion 32, an upward concave portion 105 is formed on the bottom surface portion 66 of the cover body 18. The recess 105 has an opening width W. The size of the opening width W is determined so as not to prevent dripping of the fuel and to prevent the snow dust splashed from the right traveling portion 26 from entering the recess 105.

The second connecting portion 95 is a member that extends vertically to the bottom portion 106 of the recess 105. Specifically, the second connecting portion 95 is such that the second connecting portion 95 protrudes upward from the bottom 106 of the recess 105 toward the upper half 107, and the lower half 108 extends downward from the bottom 106 of the recess 105. A hollow cylindrical body protruding in this manner, in which the lower half portion 108 is disposed in the recess 105 and the lower end surface 109 is inclined.
By disposing the lower half portion 108 of the second connecting portion 95 in the recess 105, the lower half 108 can be surrounded by the recess 105.

The distal end portion 94 a is connected to the second coupling portion 95 by inserting the distal end portion 94 a of the overflow drain hose 94 into the hollow portion in the second coupling portion 95.
As a result, the tip end portion 94 a of the overflow drain hose 94 is connected to the bottom portion 106. Further, the discharge port 94 b of the distal end portion 94 a is made to face the recessed portion 105 below the bottom portion 106 through the hollow portion of the second communication portion 95.

Here, the drain hose 89 for the float chamber is a hose for taking out fuel from the float chamber of the carburetor 48 when the snowplow is not used for a long period of time.
Specifically, during the snow removal work or during the snow removal work period, a drain cock (not shown) provided on the carburetor 48 side is closed so that fuel in the float chamber does not flow out from the drain hose 89 for the float chamber. .
On the other hand, when the snow remover is not used for a long period of time, the drain cock is opened, and the fuel in the float chamber flows out from the drain hose 89 for the float chamber.

  For this reason, even if snow dust adheres to the 1st connection part 91 which connected the drain hose 89 for float chambers and it freezes during snow removal work, the vaporizer 48 is not adversely affected. Therefore, the first connecting portion 91 is formed on the bottom surface portion 66 of the lower cover portion 32.

On the other hand, an overflow drain hose 94 is a hose for taking out fuel that has overflowed in the vaporizer 48 during snow removal.
Therefore, during the snow removal work, the overflow drain hose 94 is kept open, and the fuel overflowed in the carburetor 48 is drained, that is, discharged from the carburetor 48.

For this reason, during the snow removal operation, if the snow powder freezes on the second connecting portion 95 to which the overflow drain hose 94 is connected, the overflowed fuel cannot be drained from the vaporizer 48.
Therefore, the second connecting portion 95 is formed on the bottom portion 106 of the recess 105 to prevent the snow powder from freezing in the second connecting portion 95.

Next, the effect | action of the snow remover 10 is demonstrated based on FIGS.
FIG. 7 is a view for explaining an example of releasing heat generated in the electromagnetic clutch of the snowplow according to the present invention.
When performing snow removal work with the snow remover 10, the engine 14 is driven to transmit the driving force of the engine 14 to the crankshaft 41, and the rotation of the crankshaft 41 is transmitted to the work output shaft 43 via the electromagnetic clutch 52.
The rotation of the work output shaft 43 is transmitted to the transmission shaft 46 through the pinion 44 and the bevel gear 45, and the snow removal device 15, that is, the auger portion 16 and the blower portion 17 is driven by the transmission shaft 46 to perform snow removal work.

Here, during the snow removal work, heat is generated by energization to energize the electromagnetic clutch 52 in order to turn on the electromagnetic clutch 52. Also, frictional heat is generated by controlling the on / off of the electromagnetic clutch 52.
For this reason, it is necessary to release (release) the heat generated in the electromagnetic clutch 52. Therefore, the lower end surface 65 of the engine 14 is lifted from the upper part 34 of the transmission case 11 by a distance H by attaching the projecting portions 54... Of the engine 14 to the mounting bosses 35. Thereby, a space 67 is formed between the lower end surface 65 of the engine 14 and the upper portion 34 of the transmission case 11.

By forming a space 67 between the upper part 34 of the transmission case 11 and the engine 14, heat generated from the electromagnetic clutch 52 is released from the space 67 as indicated by an arrow a, and the ambient temperature of the electromagnetic clutch 52 is suitably maintained. .
In addition, by forming a space 67 between the upper portion 34 of the transmission case 11 and the engine 14, heat generated from the engine 14 can be released from the space 67 as indicated by an arrow b.

FIGS. 8A and 8B are diagrams illustrating an example of draining the overflowed fuel from the carburetor according to the present invention.
In (a), by providing a bottomed convex portion 97 projecting upward on the bottom surface portion 66 of the lower cover portion 32, an upward concave portion 105 is formed on the bottom surface portion 66 of the cover body 18. The opening width W of the recess 105 is determined to a size that does not prevent the fuel from dropping and does not allow the snow powder splashed from the right traveling portion 26 to enter the recess 105.

A second connecting portion 95 is provided on the bottom portion 106 of the recess 105, and the leading end portion 94 a of the overflow drain hose 94 is inserted into the hollow portion of the second connecting portion 95. The leading end 94 a of the overflow drain hose 94 is opened into the recess 105 through the second communication portion 95.
By arranging the lower half portion 108 of the second connecting portion 95 in the recess 105, the lower half 108 is surrounded by the recess 105.

As a result, when the crawler belt 29 of the traveling unit 26 rotates as indicated by the arrow, the snow powder 112 splashed from the crawler belt 29 is applied to the vicinity of the opening of the concave portion 105, and the snow powder 112 enters the concave portion 105. To prevent that.
Therefore, the splashed snow powder 112 is prevented from entering the concave portion 105 and adhering to the lower half portion 108 of the second communication portion 95, so that the lower half portion 108 of the second communication portion 95 is blocked by freezing. To prevent.

  Therefore, when the vaporizer 48 overflows, the overflowed fuel is dripped from the tip end portion 94 a of the overflow drain hose 94. The dropped fuel is dropped into the recess 105 through the lower half portion 108 of the second communication portion 95, and the dropped fuel is dropped from the opening of the recess 105.

In (b), the fuel 113 overflowed from the vaporizer 48 reaches the lower end surface 109 of the second communication portion 95. It is conceivable that the fuel 113 overflowing from the vaporizer 48 is a relatively small amount and accumulates on the lower end surface 109 of the second connecting portion 95 and freezes.
Therefore, the lower end surface 109 of the second connecting portion 95 is inclined so that the fuel 113 that has reached the lower end surface 109 flows along the lower end surface 109 as indicated by an arrow c.

The fuel 113 that has flowed along the lower end surface 109 as indicated by the arrow c reaches the tip 109a of the lower end surface 109 and drops downward from the tip 109a as indicated by the arrow c.
In this way, by inclining the lower end surface 109 of the second connecting portion 95, the fuel 113 overflowed from the vaporizer 48 can be suitably dropped without accumulating on the lower end surface 109 of the second connecting portion 95.

In the above-described embodiment, a vertical engine has been described as an example of the engine 14. However, the present invention is not limited to a vertical engine, and can be applied to an engine in which a crankshaft is horizontally arranged.
In the above embodiment, the transmission case 11 is provided with four mounting bosses 35... And the engine 14 is mounted on the mounting bosses 35. The number of the engines 14 is not limited to four, and the engine 14 may be mounted on a plurality of bosses 35 other than four.

Furthermore, in the above-described embodiment, the example in which the electromagnetic clutch 52 is used as the clutch mechanism has been described. However, other clutch mechanisms can be used.
Moreover, in the said embodiment, although the example which formed the cross section of the bottomed convex part 97 provided in the lower cover part 32 in the rectangular shape was demonstrated, it is not restricted to this, The cross section of the bottomed convex part 97 is circular etc. Other cross-sectional shapes can also be used.

  In the above embodiment, the second connecting portion 95 is provided on the bottom portion 106 of the bottomed convex portion 97, and the distal end portion 94 a of the overflow drain hose 94 is inserted into the hollow portion of the second connecting portion 95, thereby Although the example in which 94a is connected to the bottom portion 106 has been described, the same effect can be obtained even if the tip portion 94a of the overflow drain hose 94 is passed through the bottom portion 106.

  Further, in the above-described embodiment, the example in which the distal end portion 94a of the overflow drain hose 94 is inserted into the hollow portion of the second connecting portion 95 has been described, but the present invention is not limited to this, and the distal end portion 94a of the overflow drain hose 94 is not limited thereto. A similar effect can be obtained by fitting the second connecting portion 95 into the second connecting portion 95.

  In the above-described embodiment, the drain drain hose 94 is described as an example of the drain pipe. However, an overflow drain pipe can be used instead of the hose.

Furthermore, in the said embodiment, although the snow remover 10 was demonstrated to the example as a working machine, a working machine is not limited to this, For example, it can also apply to other working machines, such as a tillage machine.
Moreover, although the said embodiment demonstrated the example which used the snow removal apparatus 15 as a working apparatus, a working apparatus is not restricted to this, It is also possible to use the rotary for tillage.

  The present invention can be suitably applied to a working machine equipped with a vertical engine and having a clutch mechanism housed in the machine body.

It is a side view which shows the snow removal machine (work machine) which concerns on this invention. It is a side view which shows the state which attached the engine of the snow remover which concerns on this invention to the body. It is a perspective view explaining the attachment relation of the transmission case and engine which concern on this invention. It is sectional drawing which shows the principal part of the snow remover which concerns on this invention. 1 is an exploded perspective view showing an air cleaner and a vaporizer of a snowplow according to the present invention. It is a side view which shows the vaporizer | carburetor of the snow remover which concerns on this invention. It is a figure explaining the example which discharge | releases the heat | fever which generate | occur | produced in the electromagnetic clutch of the snow remover which concerns on this invention. It is a figure explaining the example which drains the fuel which overflowed from the vaporizer | carburetor which concerns on this invention. It is a repost figure of the figure of patent document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Snow remover (work machine), 11 ... Transmission case (machine body), 13 ... Traveling apparatus, 14 ... Engine (vertical engine), 15 ... Snow removal device (work apparatus) , 18 ... Cover body , 34 ... Upper part of transmission case 35 ... Mounting boss (boss), 41 ... Crankshaft, 51 ... Storage recess, 52 ... Electromagnetic clutch (clutch mechanism) , 63 ... Generator, 66 ... Bottom part , 67 ... Space (first space) , 68 ... Space (2nd space), 72 ... Power transmission means .

Claims (1)

A vertical engine of a type in which a work device and a traveling device are provided in the airframe, and a crankshaft is vertically disposed above the airframe, a clutch mechanism is disposed below the vertical engine and in the airframe, and the crankshaft In the working machine that transmits the output of the motor to the working device or the traveling device through the clutch mechanism,
A plurality of bosses are erected at positions above the airframe and surrounding the clutch mechanism, and by attaching the vertical engine to these bosses, a first space is formed between the vertical engine and the airframe ,
A cover body that covers the vertical engine is attached to the aircraft,
A second space is formed between the generator and the bottom surface by attaching the generator to the cover body and floating from the bottom surface of the cover body,
A working machine comprising power transmission means for connecting the drive shaft of the generator and the crankshaft using the first space and the second space .

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