JP3814064B2 - snowblower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a snow removal height adjusting mechanism of a small snow remover in which a snow removal portion having an auger and a blower is provided in front of the machine provided with an engine, a traveling device, and the like.
[0002]
[Prior art]
Conventionally, a snow removal machine in which a snow removal unit having an auger and a blower is continuously provided in front of the machine provided with an engine, a traveling device, etc., and an operation unit for performing a driving operation and a snow removal operation is provided at the rear part of the machine is known. It has become. In such a snow remover, the height of the snow removing auger is adjusted up and down to adjust the snow removal height. This height adjustment of the auger supports the idler disposed at the rear of the machine. A foot pedal is provided on the idler shaft, and an operator operating the foot pedal with an operator's foot while operating an operation lever disposed on the operation unit. In addition, there is a method of reducing the burden load on the operator by interposing an up / down rotation drive cylinder between the manual idler shaft and the rotation portion and operating the cylinder with an operation switch.
[0003]
[Problems to be solved by the invention]
However, when the snow removal height is adjusted by the operator's hand or foot as in the former case, the snow removal machine itself is inexpensive, but the center of gravity of the snow removal machine is located at the center and front of the crawler type traveling device. Therefore, there is a problem that it takes a lot of force and labor to adjust the height, and the height cannot be finely adjusted. On the other hand, as in the latter case, when a rotationally driven cylinder is used, the work load can be certainly reduced, but there is a tendency that the structure becomes complicated and the number of parts increases, resulting in an increase in cost.
[0004]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, in a snowplow that has an auger provided in front of the machine and the vertical height can be adjusted, a rotation fulcrum shaft is disposed at a substantially central part in the front-rear direction of the crawler type traveling device, and the rotation fulcrum axis is the center. An upper rotating part is formed by supporting a machine frame with an engine, an operating part and a snow removing part attached to the upper part of the upper frame so that the upper part is formed between the rotating fulcrum shaft and the front traveling axis of the crawler type traveling device. The center of gravity on the rotating part side is arranged.
[0005]
Further, an elastic body is disposed between the machine body frame and the crawler type traveling device side frame to balance the weight balance between the front and rear, and the rotation fulcrum shaft is used as the output shaft of the mission case, and the rotation fulcrum Power is transmitted from the shaft to the drive sprocket of the crawler type traveling device via a transmission mechanism.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described. 1 is an overall side view of the snow removal machine, FIG. 2 is a side view of a snow removal height adjusting unit, FIG. 3 is a plan view of a mechanical lock, and FIG. 4 is a side view of the same. In this embodiment, a gas spring is used as the elastic body, but it is not particularly limited.
[0007]
First, the snowplow will be described from the overall configuration with reference to FIG. A snow removal unit 2 is connected to the front of the machine 1, and the snow removal unit 2 has an auger housing 6 covering the snow auger 5 at the forefront, and a blower is installed at the rear of the auger housing 6. A blower cover 7 is connected to the upper part of the blower cover 7 and a snow discharge chute 8 that can be turned by a motor or a lever is provided above the blower cover 7. The machine 1 is covered with a machine cover 9, an engine 10 is built in the machine cover 9, a bonnet 11 is disposed at the top, and an exhaust muffler 12 projects from the front of the bonnet 11. . A battery 13 is disposed behind the engine 10.
[0008]
An operation unit 3 is disposed at the rear of the machine 1, and an operation panel 14, a handle 15, and the like are disposed on the operation unit 3. The operation panel 14 is provided with an accelerator lever, a travel speed change lever, a snow discharge chute turning lever, a snow removal height adjustment lever 47, and the like, and a deadman switch 16 interlocking with the engine stop motor is provided in the vicinity of the handle 15. . When the operator falls down during the operation of the snowplow and releases his / her hand from the handle, the operation of the engine 10 is stopped to prevent the operator's danger.
[0009]
Below the engine 10, an HST transmission 18 and a transmission case 19 are disposed and fixed to the body frame 50, respectively. The output shafts, which are the rotation fulcrum shafts 20 and 20 projecting left and right from the transmission case 19, drive the drive shafts 22 and 22 of the crawler type traveling device via the chain case 21 serving as a transmission mechanism.・ Drive sprockets 23 and 23 fixed to 22 can be rotated. In addition, driven idlers 25 and 25 that are rotatably supported by support shafts 24 and 24 serving as traveling driven shafts are disposed at the front part of the track frame of the crawler type traveling device, and the driven idler 25 and the drive sprocket 23 are connected to each other. The space is wound around a crawler 26 to form a crawler type traveling device.
[0010]
The body frame 50 is supported so as to be pivotable back and forth around the pivot point 20, and the snow removing section 2, engine 10, transmission case 19, and operation section 3 except for the body frame 50 side, that is, the crawler type traveling device. As shown in FIG. 2, the center of gravity 51 is positioned behind the support shaft 24 and in front of the rotation fulcrum shaft 20, and arranged so that the center of gravity 51 is as close as possible to the rotation center (20) of the body frame 50. When the 50 side is turned up and down, it can be turned with a light force.
[0011]
A drive pulley 28 is fixed to the output shaft of the engine 10, and the drive pulley 28 is a double pulley, and a belt is provided between the rear traveling drive pulley 28 a and the HST input pulley 29 of the HST transmission 18. Winding is applied to transmit the driving force to the HST transmission 18. Further, with the front portion of the drive pulley 28 as a snow removal drive pulley 28b, a belt is wound between the snow removal drive pulley 28b and the auger pulley 30 provided around the auger input shaft 30a protruding rearward from the blower cover 7. , Driving the auger 5 and blower.
[0012]
Next, a height adjustment mechanism for adjusting the snow removal height will be described with reference to FIGS. A front sprocket 31 is fixed on the rotation fulcrum shaft 20 in the chain case 21, and a rear sprocket 32 is fixed on the drive shaft 22, and between the front sprocket 31 and the rear sprocket 32. The chain 33 is wound to transmit power. An arm mounting plate 34 is fixed on the front portion of the chain case 21, and a support frame 35 protrudes upward from the upper portion of the arm mounting plate 34, and an upper end portion of the support frame 35 is an elastic made of a gas spring. The other end of the elastic body 36 is connected to a mounting portion 39. The mounting portion 39 is fixed to the upper portion of the vertical frame 46, and the vertical frame 46 is fixed to the side surface of the body frame 50. The elastic body 36 urges the front portion of the body frame 50 to be lifted to balance the front and rear weights. That is, since the center of gravity 51 is located in front of the rotation fulcrum shaft 20, the body frame 50 tries to rotate forward, and the force corresponding to this moment is pulled and balanced by the elastic body 36. The chain case 21, the support frame 35, the elastic body 36, the vertical frame 46, and the like are arranged on the left and right.
[0013]
The rear portion of the chain case 21 is connected to the base portion of the telescopic guide 27 via an arm 41. The expansion / contraction guide 27 has a rod 42 provided in a cylinder 43 so as to be extendable / contractible, and the cylinder 43 is provided with a mechanical lock 44 for fastening and fixing the rod 42. The mechanical lock 44 is attached to an electric cylinder or a hydraulic cylinder, and the specification can be changed so that it can be moved up and down by manual operation of a switch. Then, by changing to cylinder drive, stepless adjustment can be made possible.
The upper portion of the rod 42 is connected to the vertical frame 46 through an arm 45.
[0014]
As shown in FIGS. 3 and 4, the mechanical lock 44 has a structure in which a rod 42 is passed through the center of the case 49, and tightening balls 52, 52... Are arranged around the rod 42 in the case 49. A pressing shaft 50 is rotatably supported at one end of the case 49, and a slit portion 50a is formed on the side surface of the pressing shaft 50, and a pressing ball 51a is interposed between the slit portion 50a and the fastening ball 52. -51b is arranged. A lever 48 is fixed to the lower end of the pressing shaft 50, and the lever 48 is connected to a lock lever provided in the operation unit 3 via a link or a wire.
When the lock lever is rotated to rotate the lever 48, the pressing shaft 50 is rotated, and the pushing balls 51a and 51b are pushed by the inclination of the slit 50a, and the tightening balls 52, 52, and so on. · Tightens the periphery of the rod 42 to fasten and fix the cylinder 43 and the rod 42.
[0015]
When adjusting the snow removal height with this configuration, first, the lever 48 of the mechanical lock 44 is operated to release the fastening of the cylinder 43 and the rod 42, the handle 15 is moved up and down, and the machine frame 50 is rotated with the rotation fulcrum shaft 20 as a fulcrum, the snow removal height is adjusted, and when the desired height is reached, the lever 48 of the mechanical lock 44 is operated again to fasten and fix the cylinder 43 and the rod 42.
[0016]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained. In other words, the center of gravity of the upper rotation portion of the snow removal portion can be brought closer to the vertical rotation fulcrum, and the turning force when adjusting the snow removal height can be reduced. And since the elastic body is arranged between the body frame and the crawler type traveling device side frame and the weight balance of the front and rear is balanced, the operation force for height adjustment is further reduced, and it is greatly increased during the adjustment It can also prevent rotation. In addition, since the rotation fulcrum is located at substantially the center of the crawler type traveling device, the ground pressure can be equalized, and the turning performance and traction performance during snow removal work can be greatly improved.
[0017]
In addition, the rotation fulcrum shaft is used as the output shaft of the mission case, and power is transmitted from the rotation fulcrum shaft to the drive sprocket of the crawler type traveling device via the transmission mechanism. The transmission shaft to the apparatus can also be used, and the transmission mechanism is positioned rearward so that the center of gravity moves rearward and stable running is possible.
[Brief description of the drawings]
FIG. 1 is an overall side view of a snowplow.
FIG. 2 is a side view of a snow removal height adjusting unit.
FIG. 3 is a plan view of a mechanical lock.
FIG. 4 is a side view of the same.
[Explanation of symbols]
1 Machine 2 Snow removing part 5 Auger 10 Engine 20 Rotating fulcrum shaft 21 Chain case 22 Drive sprocket shaft 27 Extending guide 35 Support frame 36 Gas spring 44 Mechanical lock

Claims (3)

In a snowplow with an auger provided in front of the machine, the vertical height of which can be adjusted. The upper frame is configured to support the machine frame to which the operation unit and the snow removal unit are attached so as to be able to rotate back and forth. A snowplow characterized by having a center of gravity on the part side. The snowplow according to claim 1, wherein an elastic body is disposed between the machine body frame and the crawler-type traveling device side frame to balance the weight balance between the front and rear. 2. The snow removal machine according to claim 1, wherein the rotation fulcrum shaft is used as an output shaft of a transmission case, and power is transmitted from the rotation fulcrum shaft to a drive sprocket of a crawler type traveling device via a transmission mechanism. .

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