JPH0774495B2 - Small snow blower - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a self-propelled small snow remover equipped with a crawler type traveling body.

[Prior art]

As a small snow blower of this type, for example, "Saikai 54-
As disclosed in Japanese Patent No. 126343, an auger is provided on the front part of the vehicle body, crawler type traveling bodies are arranged on both left and right sides of the vehicle body, and the auger and the traveling body are driven by an engine mounted on the vehicle body. Things are known.

[Problems to be solved by the invention]

By the way, in the case of this snow blower, the power of the engine is transmitted from the output shaft of the engine to the drive shaft of the auger via a belt-type winding transmission mechanism that also serves as a tension clutch, so that the height of the engine mounted on the vehicle is higher. The size is naturally limited by the mounting position of the drive shaft based on the diameter of the auger and the axial distance between the drive shaft and the output shaft, which is determined by the belt winding length. It tends to be higher.

Nevertheless, since the conventional snow blower has a very strong concept as a general-purpose machine, a fuel tank is placed directly above the engine, and the snow is removed from the rear of the vehicle where the driver is located during snow removal. No particular consideration was given to the forward field of view.

Therefore, the presence of the fuel tank makes it difficult to see the area around the auger from the driver's position, and there is room for further improvement in workability during snow removal.

[Means for solving problems]

Therefore, in the present invention, the auger drive shaft is provided in the front part of the vehicle body on which the engine is mounted, the output shaft of the engine is arranged above the drive shaft, and the output shaft and the drive shaft are wound around and transmitted. A compact snow removing machine that is connected via a mechanism, and is provided with crawler-type traveling bodies driven by an engine on both left and right sides of the vehicle body, and an operation portion for snow removal and traveling is provided above the rear end of the vehicle body. In the machine, a space sandwiched by a rear surface of the engine and an operation section located behind the engine is formed on the vehicle body, and a fuel tank connected to a carburetor of the engine is arranged in the space.

[Action]

According to this configuration, the fuel tank is accommodated in the space behind the engine, so that the fuel tank does not have to protrude largely above the upper surface of the engine and the operation portion, and the height of the snow blower can be kept low. You can

Therefore, there is no protrusion that obstructs the driver's forward vision, and the periphery of the auger can be satisfactorily viewed from the operation section at the rear of the vehicle body.

〔Example〕

The present invention will be described below based on an embodiment shown in the drawings.

A vehicle body indicated by reference numeral 1 in the drawing includes a pair of left and right side frames 2 extending in the front-rear direction, and a cross member 3 connecting the side frames 2, and an auger opening forwardly at a front end portion of the vehicle body 1. A housing 4 is provided. Auger housing 4
An auger 5 is housed therein, and a drive shaft 8 is meshed with a rotary shaft 6 of the auger 5 via a bevel gear 7.
The drive shaft 8 extends in the front-rear direction on the center line of the vehicle body 1, and the rear end portion of the drive shaft 8 penetrates the rear end surface of the auger housing 4 so that the auger housing 4 can be moved to the left and right of the vehicle body 1. It is pivotally supported so that it can rotate in any direction. A hydraulic cylinder 9 is interposed between the auger housing 4 and the vehicle body 1 as shown in FIG. 2, and the piston rod 10 of the hydraulic cylinder 9 is projected and retracted, whereby the auger housing 4 and the auger 5 are inserted. Is inclined in the left-right direction with respect to the vehicle body 1.

An engine 13 is mounted on the front half of the vehicle body 1 via an engine bracket 12. The crankshaft 14 of the engine 13 is provided along the front-rear direction, and its front end portion is led out in front of the engine 13 and also serves as an output shaft for taking out engine power. The front end of the crankshaft 14 is provided above the drive shaft 8 and in parallel with the drive shaft 8. The crankshaft 14 and the drive shaft 8 are interlocked with each other via a winding transmission mechanism 15.

The winding transmission mechanism 15 of this embodiment has a V-belt 18 wound between a drive pulley 16 mounted on the crankshaft 14 and a driven pulley 17 mounted on the drive shaft 8. It is loosely wrapped around 16,17. And
An auger clutch 19 for applying tension to the V belt 18 is provided between the pulleys 16 and 17. The auger clutch 19 is a roller 20 rollingly contacting the loose side of the V-belt 18.
By loosening or tensioning the V-belt 18 with the roller 20, the power transmission from the crankshaft 14 to the drive shaft 8 is interrupted.

An impeller 23 is provided on the drive shaft 8 to blow the snow scraped off by the auger 5 outward through the discharge tube 22.

On the other hand, below the vehicle body 1, a pair of left and right swing arms 25 are arranged on both sides of the side frame 2. Swing arm 25
Has its rear end pivotally supported on the left and right rear ends of the vehicle body 1 via a pivot shaft 26 so as to be vertically rotatable. These swing arms 25 are provided with crawler type traveling bodies 27, respectively. There is.
The traveling body 27 comprises a driven sprocket 28 provided at the front end of the swing arm 25 and a drive sprocket 29 provided at the rear ends of the swing arms 25, 25. The drive sprocket 29 of 27 is supported by the left and right axles 31 penetrating the pivot 26.

In addition, the cross pipe 32 that connects the middle portions of the swing arm 25
And a cross member 3 of the vehicle body 1 are provided with a hydraulic cylinder 33, and the piston rod 34 of the hydraulic cylinder 33 is projected and retracted so that the front end portion of the vehicle body 1 is moved up and down. The height of 5 is adjusted.

By the way, the traveling body 27 having the above-described configuration is driven by the power transmission from the engine 13 similarly to the auger 5.

To explain this power transmission path, a transmission shaft 35 that extends in the front-rear direction on the lower side of the engine 13 is installed on the vehicle body 1. The transmission shaft 35 and the crankshaft 14 of the engine 13 are V-shaped. It is interlocked via a transmission mechanism 37 using a belt 36. Further, a transmission unit 40 that interlocks with the axle 31 is installed at the rear of the vehicle body 1.
The input shaft 41 and the rear end of the transmission shaft 35 are interlocked via another transmission mechanism 43 using a V belt 42.

A magnetic clutch 44 that connects and disconnects the power transmission from the transmission shaft 35 is provided on the input shaft 41.

In the transmission unit 40, as shown in FIG.
A speed change shaft 45, an intermediate shaft 46, and an output shaft 39 that interlock with 41 are supported in parallel with each other. A reduction gear 47 and a reduction gear 48 are fixed to the outer periphery of the intermediate shaft 46, and the transmission shaft 45
Another reduction gear 49 and a reduction gear 50 are slidably supported on the outer circumference of the gears only in the axial direction.By sliding these gears 49, 50 with a shift fork (not shown), the respective gears 47 to 50 are Meshing is selected. Therefore, in the case of this embodiment, each of these gears 47 to 50 is an auxiliary transmission.
51 is configured to switch the speed ratio between the speed change shaft 45 and the intermediate shaft 46 in two steps.

A plurality of speed change gears 52 are fixed to the outer circumference of the intermediate shaft 46, and these speed change gears 52 are fixed to the outer circumference of the output shaft 39.
Other speed change gears 53 meshing with are rotatably supported, and each speed change gear 53 is selectively coupled to the output shaft 39 by a speed change lever 54 that slides in the axial direction of the output shaft 39.

Therefore, the main transmission 55 is made up of these transmission gears 52, 53.
By sliding the speed change lever 54, the meshing of the speed change gears 52 and 53 for transmitting power from the intermediate shaft 46 to the output shaft 39 is selected, and the speed change ratio is changed. There is.

The output shaft 39 of the main transmission 55 is interlocked with the left and right side clutches 58 provided on the clutch shaft 57 via the reduction gear 56, and the side clutch 58 is another reduction gear.
It is interlocked with the support shaft 31 of the drive sprocket 29 via 59.

A parking brake 60 is provided at one end of the output shaft 47.

A handle 61 that is gripped by the driver is provided on the upper rear end of the vehicle body 1 during snow removal and traveling. Handle 61 is first
As shown in the figure, the pair of left and right auxiliary frames 62, which are erected on the side frame 2, are supported on the upper rear ends of the auxiliary frames 62.
Are located at substantially the same height as the upper surface of the engine 13. An operation panel as an operation unit is provided near the handle 61.
63 are provided. As shown in FIG. 2, on the operation panel 63, a shift lever 64 for operating the main transmission 55 and the auxiliary transmission 51 is supported swingably in the front-rear direction and the left-right direction. A guide groove 65 for displaying a shift pattern provided on the upper surface of the is penetrated. The guide groove 65 is provided with two kinds of reverse positions, a plurality of vertical grooves 66 for specifying the traveling position from the first speed to the sixth speed and a parking position, and a lateral groove 67 for specifying the neutral position. This is done by moving the shift lever 64 into the desired vertical groove 66 through the horizontal groove 67.

Such a shift lever 64 includes a shift lever of the main transmission 55.
A main shift rod 68 interlocking with 54 and a sub shift rod 69 interlocking with a shift fork of the sub transmission 51 are connected, and the main shift rod 68 moves when the shift lever 64 is moved left and right along the lateral groove 67. In addition, the movement of the shift lever 64 is transmitted to the speed change lever 54 to switch the meshing of the speed change gears 52 and 53, and the auxiliary shift rod 69 moves the shift lever 64 from the lateral groove 67 into the vertical groove 66. The movement of the shift lever 64 is transmitted to the shift fork to switch the meshing of the reduction gears 47 to 50.

The grip portion 70 of the shift lever 64 is provided with a push button switch 71 for activating the magnet clutch 44. When the push button switch 71 is pressed with a finger during a gear shift operation, the magnet clutch 44 is disengaged and the engine 13 The power transmission from the transmission unit to the transmission unit 40 is cut off.

Further, the operation panel 63 is provided with a control lever 72 for adjusting and controlling the inclination of the auger 5 in the left-right direction and the vertical height position. The control lever 72 is interlocked with a hydraulic pressure switching valve 73. The hydraulic pressure switching valve 73 is driven by a hydraulic pump 75 from a transmission shaft 35 via a V belt 74 and the hydraulic cylinders 9, 33.
It is provided in the oil path that connects with. Therefore, by operating the hydraulic switching valve 73 with the control lever 72, the cylinders 9 and 33 are hydraulically expanded and contracted to adjust the inclination and height of the auger 5.

In addition to the shift lever 64 and the control lever 72, the operation panel 63 includes an auger lever 89 for operating the auger clutch 19, a clutch lever 76 for operating the left and right side clutches 58, and a chute provided at the upper end of the discharge tube 22. A shoot lever 78 for changing the direction of 77 is provided.

Further, around the steering wheel 61, a deadman lever 79 that is gripped by the driver during snow removal and traveling is provided. The deadman lever 79 is interlocked with the magnet clutch 44 and the auger clutch 19, and when the driver releases the deadman lever 79 during snow removal and traveling, the magnet clutch 44 is disengaged and the traveling body 27 is stopped. The roller 20 of the auger clutch 19 is displaced in the direction away from the V-belt 18, and the rotation of the auger 5 and the impeller 23 is stopped.

By the way, the transmission unit 40 installed at the rear of the vehicle body 1
A space 80 is formed below the engine 13 and the handle 61, and between the rear surface of the engine 13 and the operation panel 63 located behind the engine 13. This space
A fuel tank 81 is arranged above the 80, and the fuel tank 81 is supported by the upper end of the auxiliary frame 62.
The upper surface of the fuel tank 81 is located below the handle 61, and the fuel outlet opening at the bottom surface of the fuel tank 81.
Reference numeral 82 is located below a carburetor 83 connected to the engine 13, and a fuel pump 84 is provided in a communication passage between the fuel outlet 82 and the carburetor 83.

Further, in a space opened below the fuel tank 81, an air cleaner 85 connected to the carburetor 83 and a battery 86 are installed.

In this embodiment, the engine 13 and the fuel tank 81
Various functional parts and operation panel on the vehicle body 1 including
As shown in FIG. 1, the periphery of 63 is covered by a cover 87, and the upper surface of the front part of the cover 87 is inclined downward 88 as it goes to the front side of the auger housing 4 as a preferable example. Is doing.

According to such a configuration, the space 80 sandwiched between the rear surface of the engine 13 and the rear operation panel 63 is formed on the vehicle body 1,
Since the fuel tank 81 connected to the carburetor 83 of the engine 13 is arranged in this space 80, the fuel tank 81 does not project to a position higher than the engine 13 or the handle 61, and the height of the entire snow removal machine is high. Can be kept low.

In particular, in this embodiment, since the upper surface of the cover 87 that covers the periphery of the engine 13 and the fuel tank 81 is inclined downward as it goes to the front side of the auger housing 4, a protrusion that hinders the driver's forward vision is provided. There is no object left, and the periphery of the auger housing 4 and the auger 5 can be favorably seen from the driver's position.

Therefore, the snow removing work can be performed from the rear of the auger 4 while grasping the snow removing condition, and the workability is improved.

Further, in this embodiment, since the fuel tank 81 is installed above the space 80, the fuel outlet 82 on the bottom surface of the fuel tank 81 and the carburetor
The height difference with 83 does not have to be so large, and therefore, there is also an advantage that a large capacity fuel pump 84 is not required.

In the above-described embodiment, the power of the engine is transmitted to the drive shaft of the auger by the winding transmission mechanism using the V-belt, but a chain may be used instead of the V-belt. The cover that covers the periphery of the fuel tank may be omitted.

〔The invention's effect〕

According to the present invention described in detail above, since the fuel tank does not have to project to a position higher than the engine, there is no protrusion that obstructs the driver's forward vision, and the vicinity of the auger is good from the driver's position. Can be overlooked. Therefore, it is possible to perform the snow removal work while grasping the snow removal status, and there is an advantage that the workability is improved.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a sectional view of the entire snow remover, FIG. 2 is a plan view of the snow remover, and FIG. 1 ... Body, 5 ... Auger, 8 ... Drive shaft, 13 ... Engine, 14
… Output shaft (crankshaft), 15… Winding transmission mechanism, 27…
Traveling body, 63 ... Operation part (operation panel), 80 ... Space, 81 ... Fuel tank, 83 ... Vaporizer.

Claims (1)

[Claims] 1. A drive shaft for an auger is provided in a front portion of a vehicle body on which an engine is mounted, an output shaft of the engine is arranged above the drive shaft, and the output shaft and the drive shaft are wound around each other to transmit power. And a crawler-type traveling body driven by an engine on both left and right sides of the vehicle body, and a snow removal and traveling operation section provided on the upper rear end of the vehicle body. In the above, the small snow removing device is characterized in that a space sandwiched by the rear surface of the engine and an operation section located behind the engine is formed on the vehicle body, and a fuel tank connected to the carburetor of the engine is arranged in this space. Machine.