JP2000064240A - Snow remover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust height to a desired level by use of a fine adjustment mechanism approximately properly during a snow removing work, to eliminate the need of such a control device as required in the case of using a conventional elevator cylinder for a mechanical lock system, and to simplify and inexpensively constitute a structure. SOLUTION: A rotary fulcrum shaft 85 is laid approximately at the lengthwise center of a crawler travel device and a machine A is held on the center of the rotary fulcrum shaft 85 elevatably and turnably, thereby forming a snow remover. In this case, an expansible cylinder 43 is provided between the machine A and the crawler travel device, and a mechanical rock 44 is provided for fixing a cylinder rod 42 at an arbitrary position. At the same time, a fine height adjustment mechanism is installed at one side of the mechanical rock 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow removing height adjusting mechanism for a walk-type snow remover in which a snow removing section having an auger and a blower is connected in front of a machine provided with an engine and a traveling device.

[0002]

2. Description of the Related Art Conventionally, a snow removing section having an auger and a blower is continuously provided in front of a machine provided with an engine, a traveling device, etc., and an operation section for performing a driving operation and a snow removing operation is provided at the rear of the machine. A walk-behind snow remover is known. In such a snow remover, the height of the auger for snow scraping is adjusted up and down to adjust the snow removal height.The height adjustment of the auger is performed by adjusting the axle supporting the drive sprocket of the crawler type traveling device. The apparatus is pivotally supported by the operator, the foot pedal is projected rearward from the rear end of the apparatus, and the operator operates the foot pedal with his / her foot. Also, an elevating cylinder is installed between the crawler type traveling device and the rear part of this machine, and the elevating cylinder is expanded and contracted by operating the operation switch,
I was able to adjust the height of snow removal.

[0003]

When the snow removal height is adjusted by the operator's foot like the former, the lifting device itself is inexpensive. However, during the snow removal work, the height of the snow removal could not be finely adjusted, and the operation with the feet could not be performed properly. In addition, like the latter, when using a lifting cylinder, the work load can be certainly reduced and the snow removal height can be finely adjusted, but the structure becomes complicated and the number of parts increases. Tended to be expensive.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, as described in claim 1, in the snow remover in which the rotation fulcrum of the machine is arranged in the crawler type traveling device, and the snow removal height adjusting mechanism is arranged between the machine and the crawler type traveling device. Between the machine and the crawler type traveling device, a cylinder configured to extend and contract is interposed, and a mechanical lock that fixes the rod of the cylinder at an arbitrary position is attached, and a height fine adjustment mechanism is provided on one side of the mechanical lock. It is provided. Further, as described in claim 2, the height fine adjustment mechanism is linked with a pantograph shape, a screw shaft is disposed between the links on both sides to change the height, and the screw shaft is rotated. It is composed of a handle. Further, according to claim 3, the fine height adjustment mechanism is provided with a lift arm projecting from a rotation fulcrum shaft of an arm pivotally supporting one side of the mechanical lock, and a link mechanism connected to the lift arm. And a lever that is connected to the link mechanism to rotate the lift arm.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. FIG. 1 is an overall side view of a snow remover, FIG. 2 is a side view of a snow remover height adjusting unit equipped with a fine height adjusting mechanism (first embodiment) of the present invention, FIG. 3 is a perspective view of a mechanical lock, and FIG. Is also a side view, FIG. 5 is a partial rear view of FIG. 2, FIG. 6 is an overall side view of another snow remover using a fine height adjustment mechanism (second embodiment), and FIG. 7 is a fine height adjustment mechanism. FIG. 8 is a side view of a snow removal height adjusting part equipped with (second embodiment), FIG. 8 is a partial rear view of FIG. 7, and FIG. 9 is a plan view of a manual lever arranged on an operation panel.

First, the overall structure of the snow blower will be described with reference to FIG. A snow removing section D is continuously provided at the front of the machine A, the snow removing section D has an auger housing 8 covering the auger 26 for snow scraping at the forefront, and a blower is provided at the rear of the auger housing 8. The blower cover 6 is continuously provided, and a snow discharge chute 7 that can be horizontally swung by the motor M is provided above the upper portion of the blower cover 6 so as to project.
This machine A is covered by this machine cover 1, and this machine cover 1
The engine E is built in the inside, the bonnet 2 is arrange | positioned at the upper part, and the work lamp 3 is projected from the upper part of this bonnet 2. A battery B is arranged behind the engine E.

An operating section C is arranged at the rear of the machine A, and an operating panel 5 and a handle 4 are arranged in the operating section C. The operation panel 5 is provided with an accelerator lever, a traveling speed change lever, a snow removal chute turning lever, etc.
A deadman lever 2 for operating a deadman switch (not shown) that is linked to the engine stop motor above and below
0 is set. The operation of the snow blower is performed with the deadman lever 20 being held together with the handle 4, and if the operator falls or releases the handle during the operation, the operation of the engine E is stopped so that This prevents the machine from entering a dangerous state. Further, the deadman switch is arranged below the operation panel 5 so as to prevent snow from adhering to prevent malfunction.

An HST transmission H and a transmission case T are disposed below the engine E, and an output shaft 85.8 serving as a rotation fulcrum shaft is provided from the transmission case T.
5 is projected to the left and right and inserted into the chain case 86,
The front sprocket 31 is fixed on the output shaft 85 in the chain case 86, the rear sprocket 32 is fixed on the rear drive shaft 11, and the chain 33 is wound between the front sprocket 31 and the rear sprocket 32. The crawler type traveling device can be turned to drive it. Further, a driven idler 1 rotatably supported by a support shaft 14 serving as a traveling driven shaft is provided at a front portion of a track frame of the crawler type traveling device.
5 and 15 are provided, and the crawler 16 is wound between the driven idler 15 and the drive sprocket 13 to form a crawler type traveling device.

As shown in FIG. 2, the machine body frame 50 is supported so as to be vertically movable up and down about an output shaft 85, which is a rotation fulcrum shaft, and the machine body frame 50 side, that is, the crawler type traveling device is mounted. The center of gravity 51 of the removed snow removal section D, engine E, mission case T, and operation section C is located behind the support shaft 14 and in front of the output shaft 85, and the center of gravity 51 is brought as close as possible to the rotation center (85) of the body frame 50. In this way, when the body frame 50 side is rotated up and down, it can be rotated with a light force.

A drive pulley 2 is attached to the output shaft of the engine E.
3 is fixed, the drive pulley 23 is a double pulley,
The rear drive pulley 23a and the HST transmission H
The belt is wound around the HST input pulley 24 and the driving force is transmitted to the HST transmission H. Further, the front part of the drive pulley 23 is used as a snow removal drive pulley 23b,
An auger pulley 2 which is installed around the snow removing drive pulley 23b and an auger input shaft 25a which projects rearward from the blower cover 6.
A belt is wound between the belt 5 and 5 to drive the auger 26 and the blower.

Next, a height adjusting mechanism for adjusting the snow removal height will be described with reference to FIGS. 2, 3 and 4. An arm mounting plate 34 is fixedly mounted on the front part of the chain case 86,
A supporting frame 35 is projected upward from an upper portion of the arm mounting plate 34, an upper end portion of the supporting frame 35 is connected to an elastic body 36 formed of a gas spring, and the other end of the elastic body 36 is connected to a mounting portion 39. is doing. 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 machine body frame 50. The elastic body 36 urges the front portion of the machine body frame 50 to be pulled up to balance the front and rear weights. That is, the center of gravity 5
Since 1 is located in front of the rotation fulcrum shaft 85, the machine body frame 50 tries to rotate forward, and the elastic body 36 pulls and balances the force corresponding to this moment. The chain case 86, the support frame 35, the elastic body 36, the vertical frame 46, etc. are arranged on the left and right.

The end of the expansion guide 72 is connected to the rear portion of the chain case 86 via the arm 41. The extension guide 72 is provided in the cylinder 43 for the rod 4
The cylinder 43 is provided with a mechanical lock 44 for fixing the rod 42 therein. The telescopic guide 72 is conventionally equipped with an electric cylinder or a hydraulic cylinder, and in this embodiment, it can be manually adjusted for cost reduction. Further, a height fine adjustment mechanism 70 for finely adjusting a snow removal height, which will be described later, is attached to the base portion (upper portion) of the cylinder 43, and the upper portion of the height fine adjustment mechanism 70 has an arm 45. It is connected to the vertical frame 46 through.

As shown in FIGS. 1, 3, and 4, the mechanical lock 44 is composed of a fixing member 55, a spring 56 as an elastic body, and a plate-like locking member 57. The fixing member 55 is formed by bending a steel plate or the like into an inverted "U" shape in a side view. Through holes 55a, 55a are formed in the upper and lower surfaces of the fixing member 55, and the through hole 55a. The diameter of 55a is slightly larger than the diameter of the rod 42. Then, the tip of the cylinder 43 is fixed to the upper surface of the fixing member 55 such that the rods 42 and the through holes 55a and 55a are aligned in axis, and the rod 42 is penetrated through the cylinder 43 and the through holes 55a and 55a. I have it inserted.

A rectangular opening 55b is formed on the side surface of the fixing member 55, and one end of the locking member 57 is inserted into the opening 55b. A through hole 57 a that is slightly larger than the diameter of the rod 42 is opened in the middle of the member 57.
The rod 42 penetrates a. The other end of the lock member 57 is connected to a lock lever 59 provided near the handle 4 via a wire 58. The wire 58 is housed in an outer harness 60, one end side of the outer harness 60 is fixed to the fixing member 55, and the other end side thereof is fixed to the handle 4.

A spring 56, which is an elastic body, is externally fitted onto the middle of the rod 42 between the inside of the fixed member 55 and the lock member 57, and the lock member 57 is biased by the spring 56. Is pressed to rotate about the opening 55b as a fulcrum, and the through hole 5 of the lock member 57 is inserted into the rod 42 relative to the rod 42.
7a bites and the rod 42 is fixed by the frictional force.

In the case of adjusting the snow removing height with the above structure before the cutting operation at the snow removing portion, first, the lock lever 59 is grasped together with the handle 4, and the lock lever 59 is locked as shown by a two-dot chain line in FIG. Pull the member 57 upward,
The fixation is released by making the rod 42 slidable in the through hole 57a. Then, as shown by a chain double-dashed line in FIG. 2, the handle 4 is moved up and down to rotate the machine body frame 50 about the output shaft 85 as a fulcrum to adjust the snow removal height, and when the desired height is reached, the lock lever 59 is moved. Then, the rod 42 is fixed by the lock member 57, and the snow removal height can be determined.

Next, the first step for finely adjusting the snow removal height of the present invention
The height fine adjustment mechanism 70 of the embodiment will be described. As shown in FIGS. 1, 2, and 5, the height fine adjustment mechanism 70 is configured in a pantograph shape to finely adjust the snow removal height. That is, the lower brackets 71, 71 are fixedly mounted on the upper end of the cylinder 43,
The lower portions of the four links 73, 73, ... On both sides of 1 are pivotally supported by pivot pins 74, 74. On the other hand, the mounting plates 83, 83 are pivotally supported on the rear portion of the arm 45 by pins or the like,
An upper bracket 75 is provided below the mounting plates 83.
・ 75 is fixed. On the left and right sides of the upper brackets 75, 75, the upper portions of four links 76, 76 ... Are pivotally supported by pivot pins 77, 77.
The lower part of the shaft and the upper part of the links 73, 73 ...
It is pivotally supported on both sides of 8.78, and is configured like a pantograph.

The pivot shafts 78, 78 are arranged parallel to each other on the left and right, and a nut 79.
79 is fixed, and a screw shaft 80 is screwed into the nut 79. One of the nuts 79 is a reverse screw, the screw shaft 80 has a forward screw on one side and a reverse screw on the other side from the center, and a manual handle 81 is provided at one end of the screw shaft 80.
By rotating the manual handle 81, the link 7
The height fine adjustment mechanism 70 is configured by changing the inclination of 3, 73, ..., 76, 76, ... The manual handle 81
It is also possible to use a motor instead of and to move up and down by operating a switch.

With this structure, when the snow removing operation is performed, the snow removing height is first adjusted to some extent by the operation of the mechanical lock 44 described above, and then the fine snow height adjusting mechanism 70 is used to cut the snow. Adjust the height. This height adjustment is performed by rotating the manual handle 81.
The height fine adjustment mechanism 70 can be moved up and down to finely adjust the height of the snow removal section D. That is, the snow removal section D can be cut into the snow with a light force and with good operability.

Next, a second step for finely adjusting the snow removal height
The height fine adjustment mechanism 61 of the embodiment will be described. As shown in FIGS. 6 to 9, the left and right chain cases 86, 86
Support pipes 62, 62 are fixedly provided at the rear portion, and a rotary shaft 63 is rotatably supported by the support pipes 62, 62. Further, the front sides of the arms 41, 41 are fixed to the left of the left-right center of the rotary shaft 63, and the rear sides of the arms 41, 41 are connected to the tip end portion (rod 42) of the extension guide 72. The expansion / contraction guide 72 is constructed in the same manner as described above, and the rod 42 is installed inside the cylinder 43 so as to be expandable and contractible, and the cylinder 43 is provided with a mechanical lock 44 for fastening / fixing the rod 42. The base portion (upper portion) of the cylinder 43 is connected to the vertical frame 46 via the arm 45.

The rotating shaft 63 has a link mechanism 64.
It is connected to a manual lever 65 provided in the operation section C via. The link mechanism 64 is composed of lift arms 66 and 66 fixed substantially at the right and left center of the rotary shaft 63, and a connecting rod 67 connected to the lift arms 66 and 66. The lower end of the connecting rod 67 is pivotally supported on the rear side of the lift arm 66, and the length of the lift arm 66 is longer than that of the arm 41 so that the operating force becomes small. The upper end of the connecting rod 67 has a connecting arm 6
9 is pivotally supported at one end of the connecting arm 69, and the middle portion of the connecting arm 69 is the shaft 6
It is pivotally supported by 8. A boss 71 is fixed to the other end of the connecting arm 69.
A lower end of a manual lever 65 is rotatably attached to the shaft 1. Further, as shown in FIGS. 6, 7, and 9, the upper portion of the manual lever 65 is extended on the operation panel 5 and can be rotated back and forth about a shaft 68. It is possible to rotate laterally (left and right in FIG. 9) so that it can be fixed in position by engaging with one of the plurality of notches 88, 88 ... Of the guide groove 87 formed on the operation panel 5. ing.

With this construction, before the cutting work, the fastening of the cylinder 43 and the rod 42 is released by the operation of the mechanical lock 44 in the same manner as described above, the handle 4 is moved up and down, and the machine body frame 50 is moved. Is rotated about the output shaft 85 as a fulcrum to adjust the snow removal height, and when the desired height is reached, the lever 59 is released and the cylinder 43 and the rod 42 are fastened and fixed. When the snow removal height is finely adjusted during the cutting operation, the manual lever 65 is set to the guide groove 87.
The connecting rod 67 is moved up and down to move the connecting rod 6
The lift arms 66, 66 connected to the lower end of 7 rotate the rotary shaft 63, and the expansion and contraction guide 72 moves up and down in accordance with the rotation of the rotary shaft 63, and the machine frame 50 is supported by the output shaft 85. As a result, the snow removal height can be finely adjusted. As described above, also in the second embodiment, the snow removal height can be finely adjusted, and the snow removal portion D can be cut into the snow with a light force and good operability.

[0023]

Since the present invention is constructed as described above, it has the following effects. That is, as described in claim 1, the rotation fulcrum of this machine is arranged in the crawler type traveling device,
In a snow remover in which a snow removal height adjusting mechanism is arranged between the main unit and the crawler type traveling device, an expandable cylinder is interposed between the main unit and the crawler type traveling device, and a rod of the cylinder is installed. By installing a mechanical lock that fixes at the arbitrary position and providing a height fine adjustment mechanism on one side of the mechanical lock, the approximate snow removal height is determined by operating the mechanical lock mechanism before snow removal work. During the snow removing work, the fine adjustment mechanism can be used to adjust the height to a desired height almost accurately. In addition, the mechanical lock mechanism does not require a control device as in the case of using a conventional lifting cylinder, has a simple structure, and can have an inexpensive structure.

According to a second aspect of the invention, the height fine adjustment mechanism is provided with a link connecting the pantograph-like links, a screw shaft arranged between the links on both sides to change the height, and the screw shaft. Since the handle is configured to rotate, by rotating the manual handle, the height fine adjustment mechanism can be moved up and down to easily finely adjust the height of the snow removing section, and the pantograph shape makes it light. By force, and
The height can be adjusted with good operability, and the height can be easily adjusted during snow removal work.

According to a third aspect of the present invention, the height fine adjustment mechanism is connected to the lift arm, which is provided so as to project from a rotation fulcrum shaft of an arm pivotally supporting one side of the mechanical lock. Since the link mechanism and the lever that is connected to the link mechanism to rotate the lift arm are configured, the manual lever can be operated to rotate the rotation fulcrum shaft, and the snow removal height can be finely adjusted. The structure is simple, and the operating force can be lightened by lengthening the lift arm, and the structure can be constructed at a lower cost than before.

[Brief description of drawings]

FIG. 1 is an overall side view of a snow blower.

FIG. 2 is a side view of a snow removal height adjustment unit equipped with a height fine adjustment mechanism (first embodiment) of the present invention.

FIG. 3 is a perspective view of a mechanical lock.

FIG. 4 is a side view of the same.

FIG. 5 is a partial rear view of FIG.

FIG. 6 is an overall side view of a snow blower using another height fine adjustment mechanism (second embodiment).

FIG. 7 is a side view of a snow removal height adjustment unit equipped with a height fine adjustment mechanism (second embodiment).

8 is a partial rear view of FIG. 7. FIG.

FIG. 9 is a plan view of a manual lever arranged on the operation panel.

[Explanation of symbols]

A This machine C operation part D Snow removal section E engine 42 rod 43 cylinders 44 Mecha Lock 50 airframe 61/70 Fine height adjustment mechanism 62 Support tube 63 rotation axis 64 link mechanism 65 Manual lever 72 Telescopic guide 73 ・ 76 Link 80 screw shaft 81 Handwheel 85 Rotation fulcrum shaft 86 chain case

Claims (3)

[Claims] 1. A snow remover in which a turning fulcrum of the machine is arranged on a crawler type traveling device, and a snow removal height adjusting mechanism is arranged between the machine and the crawler type traveling device. A telescopic cylinder is interposed between the devices, a mechanical lock for fixing the rod of the cylinder at an arbitrary position is mounted, and a height fine adjustment mechanism is provided on one side of the mechanical lock. And a snow blower. 2. The height fine adjustment mechanism is composed of a link connected in a pantograph shape, a screw shaft arranged between the links on both sides to change the height, and a handle for rotating the screw shaft. The snow blower according to claim 1, wherein: 3. A lift arm having the fine height adjustment mechanism protruding from a rotation fulcrum shaft of an arm pivotally supporting one side of the mechanical lock, a link mechanism connected to the lift arm, and the link mechanism. The snow blower according to claim 1, wherein the snow blower is configured by a lever that is connected to the lever to rotate the lift arm.