JP2000290951A - Tilt mechanism for snowplow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust the height of a snowplow part by releasing the lock of a machine body with good operability without removing hands from handles. SOLUTION: This tilt mechanism is provided for a snowplow 1 having a pair of right and left handles 40 attached to the rear of a body 2 and a snowplow part 5 at the front of the body 2, with the entire body 2 supported in such a way as to be vertically rotatable about a drive shaft 35. The tilt mechanism comprises a tilt rod (lock means) 45 for locking the rotation of the body 2 about the drive shaft 35 and a tilt lever 56 which is rotated for undoing the locking of the body 2 by the tilt rod 45. Each handle 40 comprises an inclined part 40a and a horizontal part 40b. A grip 52 for gripping by an operator is provided at the rear end of the horizontal part 40b and a bracket 72 is fixed near the front of the grip 52 of the horizontal part 40b of one of the handles 40. The tilt lever 56 is rotatably journaled to the bracket via a shaft 58 and the part 56a of the tilt lever 56 extending backward from the shaft 58 is opposed to the grip 52 via a space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt mechanism provided in a snow blower which supports an entire body having a snow removing portion at a front portion thereof so as to be able to turn up and down around a drive shaft of a traveling device.

[0002]

2. Description of the Related Art In general, a snowplow is provided with a snowplow including an auger at the front of a body equipped with an engine as a driving source, and the auger of the snowplow is rotated while the body is advanced by a traveling device. It collects snow at the center in the width direction and sucks the collected snow with a blower and discharges it from the shooter.To adjust the depth of cut into the snow surface of the snow removing section, the entire machine is driven by a traveling device. The apparatus is supported so as to be rotatable up and down around a drive shaft, and the height and the like of a snow removing section are adjusted by locking and unlocking the body by a tilt mechanism.

[0003]

However, in the conventional tilt mechanism, since the operation lever for locking the rotation of the machine body is provided on the upper surface of the operation panel, for example, snow removal is performed to make the auger bite into the snow surface. When lifting the part, it was necessary to lift the handle with both hands and then operate the operation lever to lock the aircraft, and one hand had to be released from the handle. For this reason, there has been a problem that the snow removing unit is lowered because the hand can not support the airframe with one hand.

Further, when adjusting the height of the snow removing section, the operator steps down on the body, so that there is a problem that the operation lever or the handle hinders the operator's operation when the body is unlocked.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to easily adjust the height of a snow removing section by releasing a lock of a machine body with good workability without releasing a hand from a handle. To provide a tilting mechanism for a snowplow.

[0006]

In order to achieve the above object, according to the present invention, a pair of left and right handles are attached to a rear portion of a body equipped with an engine, and a snow removing section including an auger is provided at a front part of the body. A mechanism provided in a snow blower for rotatably supporting the entire body up and down about a drive shaft of a traveling device, the locking means being configured to lock the rotation of the body about the drive shaft. And a tilt mechanism of a snow blower having a tilt lever for releasing the lock of the body by the locking means by a rotation operation, wherein each handle extends obliquely upward from the rear of the body toward the rear. An inclined portion and a horizontal portion that extends substantially horizontally rearward continuously from the upper portion of the inclined portion, and a grip for an operator to grip at the rear end of the horizontal portion is provided. Horizontal part A bracket is fixed near the front of the grip, and the tilt lever is pivotally supported on the bracket via a shaft, and a portion extending rearward from the shaft of the tilt lever is attached to the grip via a space. It is characterized by facing.

According to a second aspect of the present invention, in the first aspect of the present invention, the tilt lever is moved up and down with a grip of a traveling clutch lever or an auger clutch lever disposed near the grips of the pair of right and left handles. It is characterized by being arranged on the opposite side in the direction.

According to the first aspect of the present invention, since the tilt lever for releasing the locking means is provided near the grip of the handle and opposed to the grip via a space, the operator can handle the hand with the handle. The lock means can be released by rotating the tilt lever with a hand while holding the grip without releasing the grip, so that the height of the snow removing section can be easily adjusted. Even if the locking means is released and the height of the snow removal part changes suddenly, the operator supports the handle with both hands and is away from the rotation locus of the machine, so the handle and lever etc. It does not interfere with the work of.

According to the second aspect of the present invention, since the tilt lever is disposed on the opposite side of the traveling clutch lever or the auger clutch lever in the up-down direction with the grip interposed therebetween, the worker can use the auger clutch lever or the traveling clutch. The locking means can be released by rotating the tilt lever while holding the lever.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view of the snow remover, FIG. 2 is a plan view of the snow remover, FIG. 3 is a rear view of the snow remover, FIG. 4 is an enlarged sectional side view of a scraper portion of the snow remover, and FIG. FIG. 6 is a plan view of the shooter turning mechanism of the snow remover, FIG. 7 is a side view of the shooter portion of the snow remover, FIG. 8 is a rear view of the operation panel of the snow remover, and FIG. FIG. 9 is a side view of a deflector lever portion of the snow blower, and FIG.
FIG. 11 is a plan view of a deflector lever and a shooter switch of the snow blower.

In the snow blower 1 shown in FIGS. 1 to 3, reference numeral 2 denotes a body, which is driven by a pair of right and left crawler running devices 3. An engine 4 as a drive source is mounted at the center of the body 2, and a snow removing unit 5 is provided at the front. In FIG. 1,
6 is a fuel tank, 7 is an exhaust muffler, and 8 is a knob of a recoil starter.

The snow removing section 5 includes a casing 9 attached to the front of the body 2, an auger housing 10 attached to the casing 9, and an auger 11 rotatably stored in the auger housing 10. And the shooter 1 erected on the upper surface of the casing 9 so as to be able to turn horizontally.
2 and a blower (not shown) housed in the casing 9.

The auger housing 10 is constructed by attaching left and right side walls 10b to both sides of a rear wall 10a which is curved and formed into a substantially circular arc shape, has an open front surface, and the auger 11 is rotatable therein. It is stored in. Here, the auger 11 is formed on both side walls 10b of the auger housing 10.
A spiral abrading blade (not shown) is attached to a rotating shaft 13 which is rotatably mounted horizontally. The auger 11 and the blower are driven to rotate by receiving power transmitted from the engine 4. You.

As shown in FIGS. 1 and 4, a scraper 14 is attached to the lower portion of the auger housing 10 over the entire width. The scraper 14 is used to scrape off snow that has not been scraped off by the auger 11 or snow that has frozen on the ground. This scraper 14 is provided on an end of a base plate 15 that is bent and shaped in a side view. It is constructed by assembling three sheet metals 16, 17, 18 whose edges are formed in a sawtooth shape so as to be shifted from each other in the front-rear direction.

[0016] As shown in FIG.
5 are left and right side walls 10 of the auger housing 10 at both ends.
b is fastened to the rear wall 10a of the auger housing 10 by a plurality of (seven in the illustrated example) bolts 20. And FIG.
As shown in FIG. 5, the three sheet metals 16 to 18 are detachably mounted on the base plate 15 by a plurality of (in the illustrated example, 14) screws 21, and are provided in the middle (second stage). The sheet metal 17 is arranged to be shifted forward by a predetermined length from the uppermost sheet metal 16, and the lowermost sheet metal 18 is arranged to be shifted forward by a predetermined length with respect to the intermediate sheet metal 17. Therefore, as shown in FIG.
Nos. 6 to 18 form saw teeth having a step-like slope as a whole.

As shown in FIG. 1, a positioning skid 22 is attached to the rear wall 10a of the auger housing 10.

On the other hand, the shooter 12 is supported on the upper part of the casing 9 so as to be able to turn horizontally. The shooter 12 is turned horizontally by the shooter turning mechanism 23 shown in FIG.

The shooter turning mechanism 23 has a motor 24 mounted on the casing 9 as a driving source. The rotation of the motor 24 is reduced and changed in direction by a worm gear mechanism (not shown) and transmitted to a small-diameter gear 25. Is done.

The small-diameter gear 25 is meshed with a ring-shaped large-diameter sector gear 26 attached to the outer periphery of the lower portion of the shooter 12. Is reduced by the sector gear 26 and transmitted to the shooter 12,
As a result, the shooter 12 is horizontally turned left and right within the range of the angle θ shown in FIG. 6, and the direction in which the snow is discharged from the shooter 12 is changed. The sector gear 26 has an angle θ.
The teeth are partially engraved only in the area. As shown in FIG. 2, a battery 27 is disposed on the right side of the casing 9 (on the right side as viewed from the front).

As shown in FIGS. 1 and 7, a deflector 28 for changing the snow discharge angle is attached to the tip of the shooter 12 so as to be tiltable about a shaft 29. A return spring 32 is interposed between the brackets 30 and 31 attached to the rear surfaces of the shooter 12, respectively. One end of a cable 33 is connected to a side portion of the deflector 28.

Here, the crawler traveling device 3 will be described.

The pair of left and right crawler traveling devices 3 is composed of a drive shaft 35 which is installed in parallel with each other and rotatably around a pair of left and right traveling frames 34 shown in FIGS.
Endless crawler 3 between guide wheel 38 and drive sprocket 37 attached to each end of driven shaft 36
9 is wound.

The rotational power of the engine 4 is transmitted to the drive shaft 3 of each crawler traveling device 3 by a transmission mechanism (not shown).
5, the drive shaft 35 and the drive sprocket 37 connected to the drive shaft 35 are rotationally driven, and the rotation of the drive sprocket 37 drives the crawler 39 to rotate, so that the snow removing machine 1 travels on the snow surface. I do.

As described above, the entire body 2 including the engine 4 and the snow removing section 5 is supported so as to be rotatable up and down around the drive shaft 35. The handle 40 is erected obliquely upward toward the rear. That is, each handle 40
As shown in FIG. 1, the vehicle body 2 includes an inclined portion 40a extending obliquely upward from the rear portion to the rear portion, and a horizontal portion 40b extending substantially horizontally rearward from the upper portion of the inclined portion 40a. The rear end of the horizontal portion 40b has a grip 5
2 are applied. As shown in FIGS. 1 and 3, the lower portion of each handle 40 is attached to the side of the body 2 by two bolts 42 with a plate 41 interposed therebetween. The lower portions of a pair of left and right brackets 43 are connected by bolts 44,
The upper portions at the left and right ends of each bracket 43 are welded to the lower portion of each handle 40.

Between the ends of the pair of left and right brackets 43 extending toward the center in the vehicle width direction, the end of the cylinder 46 of the tilt rod 45 as locking means constituting a part of the tilt mechanism according to the present invention. Are connected by pins 47, and the end of a rod 48 extending downward from the cylinder 46 of the tilt rod 45 is connected to a connection shaft 49 that is bridged between the rear portions of the pair of left and right traveling frames 34. .

Here, the tilt rod 45 includes the cylinder 46, the rod 48 partially slidably fitted in the cylinder 46, and the sliding movement of the rod 48 built in the cylinder 46. And a release lever 50 provided on the side of the cylinder 46. The release lever 50 is rotated in the circumferential direction of the cylinder 46 to lock the lock. The lock of the rod 48 by the mechanism is released and the rod 4
8 can slide freely with respect to the cylinder 46. The structure and operation of the tilt rod 45 are described in detail in JP-A-9-158.
See No. 906.

On the other hand, an operation panel 51 is provided between the upper portions of the left and right handles 40. As shown in detail in FIG. 8, a traveling clutch lever 53 is provided near the grip 52 of the left handle 40. The auger clutch lever 55 and the tilt lever 56 are provided so as to be rotatable about shafts 57 and 58, respectively, near the grip 52 of the right handle 40. That is, as shown in FIG.
A bracket 72 is fixed near the front of the grip 52b, and the tilt lever 56 is rotatably supported on the bracket 72 via a shaft 58. The extension 56a extending rearward from the shaft 58 of the tilt lever 56 has a grip 5 through a space as shown in FIG.
2 and there is no member between them.

When the traveling clutch lever 53 is gripped, the traveling clutch (not shown) is turned on. When the traveling clutch is turned on, the power of the engine 4 is transmitted to the crawler traveling device 3 and the crawler traveling is performed. The device 3 is driven, which causes the snow blower 1 to run. When the auger clutch lever 55 is gripped, the auger clutch (not shown) is turned on. When the auger clutch is turned on, the power of the engine 4 is transmitted to the auger 11 and the auger 11 is driven to rotate. The required snow removal work is performed.

As shown in FIG. 1, the tilt lever 56 is connected to the tilt rod 4 via a cable 59.
When the tilt lever 56 is gripped, the release lever 50 is rotated via the cable 59 to unlock the tilt rod 45,
When the tilt lever 56 is released, the tilt rod 45 is locked again.

On the other hand, as shown in FIG. 8, a main switch 60 is disposed at a position near the right handle 40 on the operation panel 51, and is tilted in the front-rear direction at the center of the operation panel 51 in the width direction. A possible gearshift 61 is provided. The shift lever 61 is for switching the forward and backward movement of the snow blower 1 and adjusting the traveling speed. When the shift lever 61 is tilted forward from the substantially vertical neutral state shown in FIG. 1, the snow remover 1 moves forward, and conversely. When the snowplow is tilted backward, the snowplow 1 moves backward, and the running speed changes according to the angle of the snowplow.

The shift lever 61 on the operation panel 51
A deflector lever 62 is provided at a middle position between the transmission lever 61 and the traveling clutch lever 53 on the left side. That is, as shown in detail in FIG.
A bracket 64 that rotates about the center 3 is connected thereto, and the other end of the cable 33 (see FIG. 1) connected to the shooter 12 is connected to the bracket 64.

Thus, the deflector lever 62 is
When the cable 3 is tilted forward to the position indicated by the dashed line in FIG. 9, the cable 33 is pulled and the deflector 28 shown in FIG.
When the deflector lever 62 is tilted backward about the shaft 63 to the position indicated by the dashed line in FIG. 9, the cable 33 is loosened and the deflector 28 is moved by the return spring 32. It is pulled backward and tilted about the axis 29 (in the direction of arrow C in FIG. 1), thereby changing the snow discharge angle.

As shown in FIGS. 8 to 11, a pipe 65 is slidable up and down on the deflector lever 62.
A round bar-shaped shooter rotation lever 66 bent in a side view shape is attached to the upper end of the pipe 65, and the lower end of the pipe 65 is connected to the upper end of the pipe 65. The base end of the arm 67 is connected in a direction perpendicular to the axis.
The shooter turning lever 66 is connected to the deflector lever 6.
The second knob 62a is disposed at a position within a reach of a finger of an operator who holds the knob 62a.

By the way, as shown in FIGS. 9 and 10,
A semicircular concave groove 65a is formed in a part of the upper surface of the pipe 65, and the pipe 65 is provided with a deflector lever 62.
A spring 68 compressed between the arm 67 and the bracket 64 on the outer periphery of the bracket 65 constantly urges the spring upward, and the concave groove 65 a formed at the upper end thereof is provided on the side of the deflector lever 62. The position is restricted by engaging with the pin 69. As described above, the pin 69 engages with the concave groove 65a formed on the upper surface of the pipe 65, so that the shooter rotation lever 66 faces forward and holds the neutral position as shown in FIG. .

On the other hand, as shown in FIG. 11, a shooter switch 70 is fixedly mounted on a horizontal portion of the bracket 64. Since the shooter switch 70 rotates integrally with the deflector lever 62, the shooter switch 70 is disposed between the two. Are kept constant, and there is no trouble in rotating the deflector lever 62.

The shooter switch 70 is housed in the operation panel 51 as shown in FIG.
A switch lever 70a is provided which is tilted left and right from a vertical neutral position shown by a solid line as shown by a chain line. The switch lever 70a and the arm 6
7 are connected to each other by a wire-like link member 71, and the link member 71 and the arm 67 constitute a link mechanism.

When the operator operates the shooter turning lever 66 with his / her finger and turns it left and right while holding the knob 62a of the deflector lever 62, the shooter turning lever 6
6 is connected to a pipe 65 and an arm 67 connected to the lower end of the pipe 65 is integrally rotated left and right. The rotation of the arm 67 is performed by a switch lever of a shooter switch 70 via a link member 71. The motor 24 (see FIG. 6) of the shooter turning mechanism 23 is rotated forward and reverse, and the shooter 12 turns left and right within the range of the angle θ shown in FIG. As a result, the direction in which the snow is discharged from the shooter 12 is changed.

Since the concave groove 65a formed on the upper surface of the pipe 65 is engaged with the pin 69 as described above,
When the finger is released from the shooter turning lever 66, the shooter turning lever 66 returns to the neutral position, and the power supply to the motor 24 is turned off. The switch lever 70a of the shooter switch 70 is also biased in a neutral direction by a spring (not shown).

Next, the operation of the snow blower 1 having the above configuration will be described.

The main switch 6 on the operation panel 51
0 is turned on to pull the knob 8 (see FIG. 1) of the recoil starter to start the engine 4, and then the shift lever 61
When the traveling clutch lever 53 is depressed in a state where the vehicle is tilted forward, for example, the traveling clutch (not shown) is turned on, and the engine 4
Is transmitted to the crawler traveling device 3, the crawler traveling device 3 is driven, and the snow blower 1 moves forward. When the gear shift lever 61 is tilted backward, the snow blower 1 moves backward.

When the auger clutch lever 55 is depressed when the snow blower 1 has moved to the work place, the auger clutch (not shown) is turned on, and the power of the engine 4 is increased by the auger 11.
The auger 11 is driven to rotate, and the snow is raked in the center in the width direction. Then, the raked snow is sucked by a blower (not shown) stored in the casing 9 and discharged from the shooter 12, and the required snow removing operation is performed in this manner.

Even if the user releases the auger clutch lever 55 once gripped while the snow plow 1 is running with the travel clutch lever 53 being held, the auger clutch remains ON and the auger 11 rotates as it is. The snow removal work is continued. When the hand is released from the travel clutch lever 53, both the travel clutch and the auger clutch are turned off, and the travel of the snow blower 1 and the rotation of the auger 11 are stopped at the same time.

By the way, during the snow removal operation, the deflector lever 6 is gripped by the knob 62a of the deflector lever 62.
2 is tilted back and forth, as described above, the deflector 28
In the direction of arrow B or C to change the snow discharge angle. Then, the operator operates the knob 62 of the deflector lever 62.
When the shooter turning lever 66 is rotated left and right with a finger while holding the a, the shooter 28 horizontally turns left and right within the range of the angle θ shown in FIG. Can be changed.

When adjusting the depth of cut of the auger 11 on the snow surface, the release lever 50 of the tilt rod 45 is operated via the cable 59 by gripping the tilt lever 56 as described above. Since the lock of the tilt rod 45 is released, the fuselage 2 can be turned up and down around the drive shaft 35, thereby changing the height position of the auger 11 of the snow removing section 5 and changing the snow surface of the auger 11. It is possible to change the cutting depth and the like.

When the user releases the tilt lever 56 after adjusting the height of the auger 11, the tilt rod 45 is locked as described above, and the rotation of the body 2 around the drive shaft 35 is also locked. .

In the tilt rod 45, the sliding of the rod 48 is locked steplessly, so that the height of the snow removing section 5 can be easily finely adjusted even during the snow removing operation.

The tilt lever 56 is connected to one of the handles 4.
0, and is provided so as to oppose the grip 52 via a space, so that the worker holds the grip 52 without releasing the hand from the handle 40,
The tilt lever 56 can be rotated by hand to release the lock of the body 2 by the tilt rod 45, and the body 2 can be rotated about the drive shaft 35, so that the height of the snow removing section 5 can be simplified. Can be adjusted. Then, even if the body 2 is unlocked by the tilt rod 45 and the height of the snow removing part 5 is suddenly changed, the operator supports the handle 40 with both hands and is further away from the rotation locus of the body 2. For,
The handle 40 and the like do not hinder the work of the operator.

Furthermore, since the tilt lever 56 is disposed below the auger clutch lever 55 disposed above the grip 52 of the right handle 40, the operator holds the auger clutch lever 55 while holding the tilt lever 56. The lock of the tilt rod 45 can be released by operating.
In addition, the tilt lever 56 is connected to the left traveling clutch lever 53.
May be disposed below the.

According to the present embodiment, the cylinder 46 and the release lever 50 of the tilt rod 45 are attached to the body 2 and the rod 48 is attached to the crawler traveling device 3. The release lever 50 remains almost immobile, and the release lever 50 and the tilt lever 56
And the relative position of the cable 59 connecting the levers 50 and 56 is not changed. In this case, since the opening of the cylinder 46 of the tilt rod 45 faces downward, entry into the cylinder 46 due to free fall of water, snow, or the like is prevented.

[0051]

As is apparent from the above description, claim 1
According to the described invention, since the tilt lever for releasing the locking means is provided near the grip of the handle and opposed to the grip via the space, the operator grasps the grip without releasing the hand from the handle. The lock means can be released by rotating the tilt lever with a hand, and the height of the snow removing section can be easily adjusted. Even if the locking means is released and the height of the snow removal part changes suddenly, the operator supports the handle with both hands and is away from the rotation locus of the machine, so the handle and lever etc. It does not interfere with the work of.

According to the second aspect of the present invention, since the tilt lever is disposed on the opposite side of the traveling clutch lever or the auger clutch lever in the vertical direction with the grip interposed therebetween, the worker can use the auger clutch lever or the traveling clutch. The locking means can be released by rotating the tilt lever while holding the lever.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the snow blower.

FIG. 3 is a rear view of the snow blower.

FIG. 4 is an enlarged side sectional view of a scraper portion of the snow blower.

FIG. 5 is a plan view of a scraper portion of the snow blower.

FIG. 6 is a plan view of a chute turning mechanism of the snowplow.

FIG. 7 is a side view of a shooter portion of the snow blower.

FIG. 8 is a rear view of the operation panel of the snow blower after being broken.

FIG. 9 is a side view of a deflector lever portion of the snow blower.

FIG. 10 is an enlarged sectional view taken along line AA of FIG. 9;

FIG. 11 is a plan view of a deflector lever and a shooter switch of the snow blower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Snow remover 2 Airframe 3 Crawler traveling device (traveling device) 4 Engine 5 Snow removing portion 11 Auger 35 Drive shaft 40 Handle 40a Inclined portion 40b Horizontal portion 45 Tilt rod (lock means) 52 Grip 53 Travel clutch lever 55 Auger clutch lever 56 Tilt Lever 56a Extension 58 Shaft 72 Bracket

Claims (2)

[Claims] 1. A pair of left and right handles are attached to a rear part of a body equipped with an engine, and a snow removal part including an auger is provided at a front part of the body, and the whole body can be turned up and down around a drive shaft of a traveling device. A mechanism provided in the snow blower for supporting the vehicle body, the locking means for fixedly locking the rotation of the body about the drive shaft, and a tilt lever for releasing the lock of the body by the locking means by a rotation operation. A tilting mechanism for a snow blower having a handle, wherein each of the handles extends obliquely upward from the rear of the body toward the rear and extends substantially horizontally rearward continuously from an upper portion of the slope. And a horizontal part to be provided, and a grip for an operator to grip is provided at a rear end of the horizontal part,
A bracket is fixed to the horizontal portion of one handle near the front of the grip, and the tilt lever is pivotally supported on the bracket via a shaft, and a portion extending rearward from the tilt lever shaft is provided. A tilt mechanism for a snow blower, wherein the tilt mechanism is opposed to the grip via a space. 2. The vehicle according to claim 1, wherein the tilt lever is disposed on the opposite side in the vertical direction with the grip of the traveling clutch lever or the auger clutch lever disposed near the grips of the pair of left and right handles. Item 2. A tilt mechanism for a snow blower according to Item 1.