JPH1068108A - Snow-removing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the switching of a moving direction or infinitely variable speed control only by control of a running change-lever without switching off a running clutch in a snow-removing machine equipped with a friction disc infinite variable speed mechanism, enable preventing a driving shaft from being idled to immediately stop driving when the driving clutch of a snow removing section is switched off and to constitute the snow-removing machine so as to prevent a traveling device thereof from being uplifted from the ground in the case of snow-removing work. SOLUTION: In a snow-removing machine, a spring arm 44 is projected from a traveling gear shaft 42 for sliding and controlling a friction plate 35 pushed against a disc 34, and a spring 45 is provided on a spring holding section 46 of the inside surface of a main body cover 1 to urge the friction disc 35 to a traveling stop set position. In a belt mechanism of a snow removing section, a clutch pulley 63 equipped with a multidisc clutch mechanism is circularly provided on a snow-removing follower shaft. A push spring 80 is spiraled to a sliding rod 79 passing through a joint member 78 placed to the rear frame 14 of a traveling device from a snow-removing fixed lever in a slidable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving unit and a snow removing unit for a small snow removing machine in which a running unit having a friction disk type continuously variable transmission mechanism is connected to a snow removing unit having an auger and a blower. And improvement of the snow removal height adjusting means.

[0002]

2. Description of the Related Art A small snow removing machine in which a snow removing section having an auger and a blower is connected to a traveling device having a friction disk type continuously variable transmission mechanism is disclosed, for example, in Japanese Utility Model Laid-Open Publication No. 62-145727. ing. What is a friction disk type continuously variable transmission mechanism?
That is, on the surface of the disk that rotates following the output shaft of the internal combustion engine,
A structure in which the outer peripheral end of the friction plate is pressed and the rotational force of the friction plate is transmitted to the drive shaft of a traveling device. This is a mechanism for performing forward / backward and stop operations of the traveling device and continuously variable transmission operation by changing the disk surface in the chord direction. Conventionally, when the position of the friction plate is switched by the traveling shift lever, the sliding pressure between the friction plate and the disc is high, so it is necessary to operate a lever (travel clutch lever) to separate the friction plate and the disk. did.

After the clutch is disengaged, when the clutch is next engaged, that is, when the disc and the friction plate are pressed against each other, the friction plate is not at the travel stop position and the disc rotates. If it is kept, the friction plate will start to rotate suddenly, and will suddenly start. Conventionally, in order to avoid this, a transmission belt is transmitted to the transmission belt mechanism from the internal combustion engine to the disk by stopping the clutch so that the rotation of the disk is stopped in conjunction with the operation of disengaging the clutch. A brake mechanism for pressing and braking was provided.

Conventionally, the rotary drive shafts of the auger and the blower of the snow removing unit are extended from a driven shaft that follows the output shaft of the internal combustion engine via a belt transmission mechanism. The driving was stopped by the tension operation (loosening the tension pulley) of the belt transmission mechanism.

Conventionally, an axle (drive shaft) of a traveling device (crawler traveling device) is pivotally supported on a traveling transmission portion connected to a snow removing portion, and the traveling transmission portion is provided on the traveling device with the axle as a swinging fulcrum. It is vertically swingable, and has a structure in which the vertical height of the snow removing unit is adjusted by adjusting the vertical angle of the traveling transmission unit with respect to the traveling device. As a means for adjusting the height of the snow removing portion to the ground, the traveling device is provided with a foot pedal, and by operating the foot pedal, the traveling device is swung with respect to the traveling transmission portion, and a fixed stage set in several stages is provided. By fixing the foot pedal to the vehicle, the vertical angle of the traveling device with respect to the traveling transmission unit is fixed, and the height of the snow removal unit with respect to the ground is set.

[0006]

Among the snow blowers of the conventional construction, the first problem with respect to the friction disk continuously variable transmission mechanism of the traveling section is that the disk and the friction plate must be always moved when the traveling speed change lever is operated. Since it is necessary to operate the traveling clutch lever to be separated, and further to perform an operation of bringing the disc into contact with the friction plate after the gearshift operation, three gearshift operations are required by one gearshift operation. Simplifying such complicated lever operations,
It is an object of the present invention to make it possible to perform a shift operation only by operating the traveling shift lever without operating the lever once, that is, without operating the clutch.

A problem that must be solved to achieve this is the operation load of the lever due to the pressing force of the friction plate against the disk. In the structure of the conventional traveling shift lever,
It was difficult to operate the lever against the operation load caused by the friction pressure of the friction plate against the disk surface. In particular, when the traveling speed change lever is operated from a high speed stage to a low speed stage, an operation load is large, and it is difficult to operate the traveling speed change lever without operating the clutch in the conventional structure. Explaining this, the rotation of the friction plate whose pressing position on the disk surface is changed by operating the traveling speed change lever is slower as the position is closer to the center of the disk surface and faster as it approaches the outer peripheral portion. The running speed is proportional to the rotation speed of the friction plate. By the way, from the relationship between the rotation direction of the friction plate and the rotation direction of the disk due to contact with the disk, the friction plate tends to slide from the center to the outer periphery of the disk surface. Therefore, when the traveling speed change lever is operated from the low gear to the high gear, the operation load becomes light, but the operation load in the opposite direction becomes heavy. Therefore, in order to avoid an operation load particularly from a high gear to a low gear, it is inevitable to operate the clutch at the time of traveling shift.

On the other hand, the opposite problem is that the friction plate pressing against the disk naturally goes to the outer periphery of the disk unless forced, so that the traveling speed change lever naturally rotates to the high gear. Try to move. Due to this, conventionally, it was not possible to have a continuously variable transmission structure, and the guide groove of the traveling shift lever is provided with some notches corresponding to several speed setting positions and traveling stop positions, The traveling shift lever had to be fixed in these notches. Therefore, the speed setting is divided into several stages, and there is no freedom as in the case of a continuously variable transmission, and at the time of shifting, it is necessary to release the fixing of the traveling speed change lever from the cutout portion.

Next, as a problem in the conventional power transmission structure for the auger and the blower in the snow removing section, the power is cut off by the tension operation of the belt transmission mechanism. Therefore, even if the belt tension is loosened, the transmission shaft rotates idly. Therefore, the rotation drive shafts of the auger and the blower on the extension also run idle and could not be stopped suddenly.
Conventionally, there is also provided a brake mechanism of a transmission belt to a disk interlocked with the clutch operation, but since this is a structure that presses the belt to brake, the braking performance is uncertain, There is a drawback that it takes time to stop and the belt is damaged. In addition, there is a possibility that the belt may be broken or come off when it is made worse, and there is a disadvantage that the brake cannot be operated.

Finally, the problem in the conventional snow removing height adjusting means will be described. To operate the foot pedal, depress the pedal with your foot, remove the pedal from the fixed step, unlock the pedal, adjust the height while raising and lowering the handle with both hands, remove the foot from the pedal, and remove The operation of fixing to. Therefore, since the operation is performed with one foot, there is a risk that the foot may be removed by snow. Further, with such an operation, it is impossible to adjust the height during traveling, that is, while performing snow removal work.

Furthermore, in the conventional means, since the traveling device and the snow removing section are integrated and the snow removal height is fixed at the set height, the traveling device rides on an obstacle such as a stone on the ground and travels. If the device and the snow removal unit face upward, the snow removal height becomes higher than the set height, snow removal remains, and when traveling further, the traveling device rides on the snow removal remaining snow, and thereafter In this state, the snow removal operation is performed in that state, and a larger amount of snow removal remains. To avoid this, once you get on the vehicle, move backward, remove obstacles on the ground, switch to forward, remove snow remaining after snow removal, or perform general snow removal work many times. Need to be repeated. In any case, the snow removal height fluctuates due to the vertical inclination of the traveling device, which hinders a reliable snow removal operation in a short time.

[0012]

The present invention uses the following means to solve the above-mentioned problems in the conventional snow blower. First of all, a structure in which the outer peripheral end of a friction plate is pressed against the surface of a disk that rotates following the output shaft of an internal combustion engine, and the rotational force of the friction plate is transmitted to a drive shaft of a traveling device, By changing the pressing position of the friction plate on the disk surface in the chord direction of the disk surface by rotating the traveling speed change lever, the forward and backward and stop operations of the traveling device, and the continuously variable transmission operation can be performed. In a snow removing machine in which a snow removing section is connected to a traveling section having a friction plate type continuously variable transmission mechanism, which is a structure to be performed, toward a pressing position on the disc which is a traveling stop setting position,
By biasing the friction plate, it is not necessary to separate the disk and the friction plate when the traveling shift lever is rotated.

Secondly, in the snow blower having the above-described configuration, the traveling stop setting position in the pressing portion of the friction plate on the surface of the disk is rotatable independently of the disk. An idle wheel is provided.

Third, in the snow blower having the above-described configuration, a clutch mechanism for separating the disc and the friction plate by a clutch disengagement operation is provided, and the friction plate is disengaged by the clutch disengagement operation. It is configured to return to the travel stop set position by the urging force.

Fourthly, the traveling speed change lever is rotated along a guide groove which is set such that the front portion is in the forward region, the rear portion is in the reverse region, and the front and rear intermediate portion is in the stop region. And a portion in which the traveling shift lever that has been rotated backward from the forward region is pressed against the stop region of the guide groove, and the traveling gear that has been rotated forward from the reverse region. A part to be pressed by a lever is provided, a front part of the reverse area is a low-speed reverse area, a rear part is a high-speed reverse area, and at a boundary between the two areas, it is rotated backward from the low-speed reverse area toward the high-speed reverse area. A portion to be pressed by the traveling speed change lever is provided.

Fifthly, in a snow removing machine in which a snow removing section having an auger and a blower is connected to a traveling section on which the internal combustion engine is mounted, the output shaft of the internal combustion engine and the rotary drive shaft of the auger and the blower of the snow removing section are connected. A brake mechanism for braking the rotary drive shaft is provided in conjunction with a clutch disengagement operation of a belt transmission mechanism provided therebetween.

Sixth, in a snow removing machine having a structure in which a front end of a traveling device is mounted as a vertical swing support point on the front and rear portions of a main body in which a snow removing portion is integrally formed with a front portion, A sliding rod is slidably connected to a connecting member at the rear end of the traveling device by a snow removing height adjusting lever provided on a handle formed on the handle, and a push is provided between the connecting member and a stopper pin provided with the sliding rod. Interpose a spring.

[0018]

Embodiments of the present invention will be described with reference to the accompanying drawings. 1 is an overall side view of the snow blower, FIG. 2 is an overall plan view of the snow remover excluding an engine, a handle, and a chute, and FIG. 3 shows a friction disk continuously variable transmission mechanism in a running section of the snow remover. FIG. 4 is a partial cross-sectional side view showing a traveling transmission mechanism and a snow removal transmission mechanism from the spline shaft 37 to the drive shaft 11 of the snow removal machine, and FIG. 5 is a plan view showing a traveling transmission mechanism and a snow removal transmission mechanism of the snow removal machine. Sectional view, FIG.
FIG. 7 is a plan sectional view of an idling mechanism portion disposed at the center of the disk 34 in the traveling power transmission mechanism of the snow blower. FIG. 7 is a rear view showing the traveling power transmission mechanism of the snow removal machine. FIG. 9 is a side sectional view of the multiple disc clutch mechanism between the brake pulley 63 and the snow removal driven shaft 62, FIG. 10 is a perspective view of the vicinity of the operation box 5, and FIG. 12, FIG. 12 is a plan view of a guide groove B of the snow removing height adjusting lever 19, FIG. 13 is a side view showing a coupling mechanism of the traveling speed change lever 18, and FIG. FIG. 15 is a side view showing a connection mechanism of the snow removal height adjusting lever 19, FIG. 16 is a schematic side view of the snow removal machine showing how the snow removal height is maintained when the traveling device is inclined upward, and FIG. How to maintain the snow removal height when the device is tilted downward It is a schematic side view of be snowplow.

First, the overall structure of the snow blower will be described with reference to FIGS. 1, 2 and 3. A snow removal section is connected to the front of the main body, and the snow removal section has a snow removal cover 8 covering the snow auger at the forefront, and a blower cover 6 having a blower 73 in the rear. And a snow removal chute 7 is projected from above the upper part of the blower cover 6 via a motor case 7a. The main body is covered with a main body cover 1, on which an engine mounting table 2 is disposed, on which an engine E is mounted.
Further, an output shaft of the engine E is disposed forward, and an output shaft cover 3 is disposed at an upper front portion of the main body cover 1 so as to cover the output shaft. Behind the rear end of the body cover 1,
Left and right handles 4, 4 are extended, and both handles 4
An operation box 5 in which various levers are disposed between the control boxes 4 is provided.

The left and right ends of a drive shaft 11 which is supported by penetrating the main body cover 1 of the main body from side to side are supported by a crawler frame 12, and a drive sprocket 13 is fixed to each shaft end. A rear frame 14 is horizontally provided between the left and right driven sprockets 15 and 15 independently of the main body, and a crawler 16 is wound around the driving sprocket 13 and the driven sprocket 15 on the same side to form a crawler type traveling device. doing. The traveling device can swing up and down with respect to the main body with the drive shaft 11 as a swing axis. In this way, the main body can adjust the vertical angle with respect to the traveling device.
Further, an arm 9 is attached to the lower end of the snow removing cover 8 in the snow removing section, and a snow removing height adjusting roller 10 is pivotally supported at the tip of the arm 9 to make it ground.

Here, levers provided on the operation box 5 and the handle 4 will be described with reference to FIGS. The operation box 5 is provided with an accelerator lever 17, a traveling speed change lever 18, a snow removal height adjustment lever 19, and a chute adjustment lever 20. The accelerator lever 17 increases or decreases the number of revolutions of the engine E, and the traveling speed change lever 18 adjusts a friction disk type continuously variable transmission mechanism provided in the main body cover 1 described later to switch between forward and backward, stop traveling, and so on. Then, a shift operation is performed.

The traveling speed change lever 1 in the operation box 5
The guide groove A for 8 guides will be described with reference to FIG.
The guide groove A is substantially linear in the front-rear direction in plan view, and is provided with a substantially U-shaped bent portion in an intermediate portion between the front and rear. A left-right groove portion at the front end of the bent portion is defined as a neutral region N, and a straight portion in the front-rear direction up to the front end of the guide groove A is defined as a forward region F. The portion up to the rear end of the bent portion is defined as a low-speed reverse region LR, and the straight portion in the front-rear direction up to the rear end of the guide groove A is defined as a high-speed reverse region HR.
And The front end of the guide groove A is the fastest forward position MF, and the rear end is the fastest reverse position MR.

In the stop area N, as shown in FIG. 11, left and right pressing portions Aa and Ab are provided, and at the boundary between the low speed reverse area LR and the high speed reverse area HR, the low speed reverse area LR is provided. A pressing portion Ac in the left-right direction is provided at the rear end portion. When the traveling speed change lever 18 in the forward range F is rotated backward, the pressing portion Aa presses the traveling speed change lever 18 to stop the traveling speed change lever 18 in the stop region N. As a result, the traveling speed change lever 18 is prevented from suddenly entering the reverse range from the forward range F, so that a sudden switch from forward to reverse is avoided. Conversely, when the traveling speed change lever 18 in the low speed reverse range LR is rotated forward, the traveling speed change lever 18 in the low speed reverse range LR is pressed against the pressing portion Ab. By preventing the vehicle from entering the forward movement range F, a sudden switch from reverse to forward movement is also avoided. That is, at the time of forward / reverse switching, the pressing portion Aa or A
b, the traveling speed change lever 18 must be stopped in the stop region N and switched to the forward region F or the low-speed reverse region LR only after a rotation operation in the left-right direction. Therefore, the snowplow is temporarily stopped when the direction of travel is switched, thereby ensuring safety.

The low speed reverse range L is higher than the high speed reverse range HR.
When shifting to R, since the guide groove A is formed smoothly, the traveling speed change lever 18 smoothly enters the low-speed reverse range LR, but conversely, shifts from the low-speed reverse range LR to the high-speed reverse range HR. When the traveling speed change lever 18 is rotated backward, the traveling speed change lever 18 is pressed against the pressing portion Ac and temporarily stands by in a low-speed reverse state before entering the high-speed reverse range HR. As a result, the traveling speed change lever 18 is prevented from being switched from the low-speed reverse range LR to the high-speed reverse range HR at once, and suddenly changes from the low-speed reverse state to the high-speed reverse state, so that the driver operating the steering wheel is not harmed. Like that.

Next, the guide groove B for guiding the snow removing height adjusting lever 19 in the operation box 5 will be described. The snow removal height adjusting lever 19 is rotatable in a front-rear direction guide groove B as shown in FIG. 12, and has a left-right cutout formed between a front end, a rear end, and both ends. There are provided several snow removal height setting stages Ba, Bb, Bc, and Bd, and the snow removal height adjustment lever 19 can be locked to these snow removal height setting stages Ba to Bd. Conventionally, the adjustment of the snow removal height is performed by a foot pedal and involves a danger such as operation with one foot. However, in the present embodiment, the snow removal height is set manually by operating the snow removal height adjustment lever 19. During snow removal work (running), which was previously impossible
The switching operation of the snow removal height is also possible.

As shown in FIG. 10, the chute adjusting lever 20 is a lever that pivots back and forth and right and left. The motor case 7 provided at the base of the snow removal chute 7
a, and a snow removal chute 7 connected to the motor through a worm is rotated in a horizontal direction.
It sets the snow removal direction.

As shown in FIG. 10, a traveling clutch lever 21 and a snow removing clutch lever 22 are disposed on the grip portions 4a of the left and right handles 4 so as to be rotatable up and down, and these are deadman clutch mechanisms. Normally, the clutch is disengaged in the upward rotation state. When the clutch is gripped together with the grip portion 4a of the handle 4 and rotated downward, the clutch is engaged.

The operation of each operating section (for example, a friction disk type continuously variable transmission mechanism, a snow removal transmission mechanism, etc.) based on the above operation of the levers, and the connection structure with the operating section will be described in the description of each operating section. Will be described.

Next, the traveling transmission mechanism will be described with reference to FIGS. In the output shaft cover 3 disposed in front of the engine E as described above, a drive pulley 23 is provided around the output shaft of the engine E, as shown in FIG. 23a, a snow removing drive pulley 23b is formed at the front. A tension pulley shaft bracket 24 is fixedly mounted on the inner surface of the main body cover 1, and a tension pulley shaft 25 is pivotally supported. As shown in FIGS. 3 and 5, the tension pulley shaft 25 is shared. A traveling tension arm 26 having a traveling tension pulley 27 is pivotally supported at the rear, and a snow removing tension arm 58 having a snow removing tension pulley 59 is pivotally supported at the front. The traveling tension arm 26 is attached to the body cover 1.
The tension spring 28 is connected to a spring receiving member 29 projecting from the bottom of the belt and is urged toward the belt pressing side. A traveling driven pulley 31 is pivotally supported in the main body cover 1 at a position below the traveling driving pulley 23a, and a traveling transmission belt 30 is provided between the traveling driving pulley 23a and the traveling driven pulley 31. The traveling transmission pulley 26 presses the traveling transmission belt 30 to apply tension.

As shown in FIG. 6, a rotary shaft 32 is rotatably supported by a bearing 33 in a longitudinally penetrating manner. A running driven pulley 31 is provided at a front end of the rotary shaft 32, and a disk 34 is provided at a rear end. Is fixed. Further, a hole for inserting the idling member 85 is provided from the center of the disk 34 to the front and rear part of the rotating shaft 32, and the bush 8 is provided in the hole of the rotating shaft 32.
3, a bearing 84 is fitted in a hole penetrating between the disk 34 and the rotating shaft 32. The idling member 85 is a member that integrally forms the idling plate 85a, the idling portion 85b, and the idling shaft portion 85c.
3, the idling portion 85 b is rotatably fitted into the bearing 84. The bearing 84 and the idling member 8
A C-shaped retaining ring 86 is provided before and after the idling portion 85b and the bearing 84 in order to prevent the position of the bearing 5 from shifting. Thus, the idling member 85 is rotatable independently of the rotation of the rotating shaft 32 and the disk 34, that is, the idling disk 85a is rotatable independently of the disk 34.

In the main body cover 1, a spline shaft 37 is horizontally supported behind the disk 34. A disk-shaped friction plate 35 is provided around the spline shaft 37 by spline fitting so as to be slidable in the axial direction of the spline shaft 37.
A connecting ring 36 is rotatably mounted on a boss portion provided on the upper surface 7 via a bearing. A friction member 35 a is attached to the outer periphery of the friction plate 35, and the outer periphery is pressed against the surface of the disk 34. When the friction plate 35 pressed against the disk 34 rotates with the rotation of the disk 34, the spline shaft 37 rotates integrally with the friction plate 35.

As shown in FIGS. 4, 5, and 7, a gear shaft 38 is fitted to the left end of the spline shaft 37, and protrudes outward from the main body cover 1. As shown in FIGS. 2 and 4, a gear cover 39 is attached to the left outer surface of the main body cover 1, and the gear shaft 38 is provided therein. On the other hand, as shown in FIGS. 4 and 7, in the gear cover 39, a counter shaft 40 is supported at a position in front of a gear shaft 38 provided with a spline shaft 37, and a first counter gear 40a and a second counter gear 40a are provided. The gear 40b is integrally provided. The drive shaft 11 is supported at a lower portion in the gear cover 39, and a drive gear 41 is provided around the drive shaft 11. In the gear cover 39, a first counter gear 40a of the counter shaft 40 meshes with the gear shaft 38, and a second counter gear 40b meshes with the drive gear 41. Thus, the spline shaft 3
7 is transmitted to the drive shaft 11. In this transmission structure, the rotation direction of the spline shaft 37 and the rotation direction of the drive shaft 11 are the same.

On the other hand, at an upper position in the body cover 1, a traveling speed change shaft 42 is supported in the front-rear direction. The traveling speed change shaft 42 rotates in accordance with the operation of the traveling speed change lever 18 (the connection structure with the travel speed change lever 18 will be described later), and as shown in FIGS. An L-shaped friction plate connecting arm 43 protruding from the rear portion is provided, and a sliding element 43a is attached to the tip of the arm 43. The sliding element 43a is fitted into the groove 36a of the connecting ring 36. The disk 3
Even if the friction plate 35 and the spline shaft 37 rotate with the rotation of 4, the connecting ring 36 does not rotate because it is attached to the friction plate 35 via a bearing.

As described above, the friction plate 35 and the connecting ring 36 are slidable in the axial direction of the spline shaft 37, that is, in the left-right direction. When the friction plate connecting arm 43 rotates integrally with the rotation of the traveling speed change shaft 42 due to the operation of the traveling speed change lever 18, the connecting ring 3 in which the sliding element 43a is fitted.
6 slides on the spline shaft 37 with it, and the friction plate 35 also slides with it. As shown in FIG.
Slides on the spline shaft 37 from the right highest forward speed position F 'to the left highest reverse speed position R' via the center travel stop setting position N '. When the friction plate 35 is at the travel stop setting position N ', the friction plate 35 (the friction member 35a)
Is an idler 85 provided at the center of the disk 34 shown in FIG.
a, the idler 85a does not rotate regardless of the rotation of the disk 34, and therefore the friction plate 34 pressing against the
Also does not rotate. Then, the friction plate 35 is connected to the spline shaft 3.
7 and slide left and right from the travel stop setting position N ',
When pressed against the surface of the disk 34 itself, a rotational force is applied to the friction plate 35, and the rotational speed increases in proportion to the distance from the travel stop set position N '.

By the way, the rotational force of the disc 34 applied to the friction plate 35 acts on the outer periphery of the disc 34, that is, on the friction plate 35, away from the neutral position N 'outward. Therefore, sliding the friction plate 35 from the low speed side to the high speed side while pressing the friction plate 35 against the disc 34 (that is, without disengaging the traveling clutch) requires only a low load, but the opposite direction is required. The load increases. Therefore, in order to reduce the sliding load of the friction plate 35 from the high speed side to the low speed side, the traveling speed change shaft 42 is urged in a direction in which the friction plate 35 becomes the traveling stop set position N '. Therefore, as shown in FIG. 3 and FIG.
The spring receivers 46 are projected from the left and right side surfaces of the spring, and the springs 45 are connected to the both spring receivers 46. When the friction plate 35 does not contact the disk 34 and slides freely on the spline shaft 37, the friction plate 35 naturally moves to the neutral position N 'by the urging force of the two springs 45. Will be located.

The traveling speed change shaft 42 protrudes rearward from the rear end of the main body cover 1, and a connecting arm 47 is fixed to the rear end. A lower end of a connecting rod 48 is pivotally supported at the tip of the connecting arm 47, and the upper end thereof is connected to the traveling speed change lever 18. This connection mechanism will be described with reference to FIGS. The upper end of the connecting rod 18 is pivotally supported at a lower part of the operation box 5 at an intermediate portion of the rotating plate 49 as shown in FIG. The rotating plate 49 is provided with a lever pivot 49a that pivots up and down on a pivot shaft 50 as a fulcrum, and pivotally supports the base end of the traveling speed change lever 18 in a left and right direction. As the traveling speed change lever 18 rotates back and forth, the rotating plate 4
9 rotates up and down around the rotation fulcrum shaft 50, and with respect to the left and right movement of the traveling speed change lever 18 near the neutral position N, the lever base end is moved right and left by the lever pivot 49 a of the rotation plate 49. It rotates and does not hinder the rotation of the rotation plate 49 itself. In addition, in the rotation fulcrum shaft 50, a washer 50a is circulated, and a friction member 50b is interposed so as to be sandwiched between the rotation plate 49 and the washer 50a to reduce the torque of the rotation plate 49. I try to adjust it. Such a structure for adjusting the rotation torque at the base end of the lever is also applied to the chute adjusting lever 20. Thus, the operation of the traveling speed change lever 18 causes the friction plate 35 to move to the spline shaft 37.
By sliding upward, the pressing position with the disk 34 is changed, the rotation speed and direction of the spline shaft 37 are changed, and the rotation speed and direction of the drive shaft 11 of the traveling device are changed.

The frictional plate 35 slides on the spline shaft 37 while being pressed against the disk 34 by reducing the operation load of the traveling speed change lever 18 from the high speed stage to the low speed stage by the urging force of the springs 45. It is possible to make it. Therefore, at the time of gear shifting operation, the traveling clutch lever 2
It is possible to perform the shift operation or the switching operation of the traveling direction only by operating the traveling speed change lever 18 without the need to perform the first shift operation, and as the speed change mode, the continuously variable speed change operation is enabled. .

Here, the traveling clutch mechanism will be described. As shown in FIGS. 3, 5, and 6, a disk rotation fulcrum shaft 51 is horizontally supported in front of the spline shaft 37, and a boss member 52 is fitted on the disk rotation fulcrum shaft 51 outside. Have been
The bearing 33 is fixed to the boss member 52 via a holding arm 53. The base end of the traveling clutch arm 54 is fixed to the boss member 52. From the middle of the traveling clutch arm 54, the spring 55 is
The running clutch arm 54 is urged downward by being connected to a spring receiving portion 56 provided at the bottom of the traveling clutch arm. Further, a wire is connected from the tip of the traveling clutch arm 54 to the traveling clutch arm 21 attached to the grip portion 4a of one of the handles 4 via an outer wire receiver 57 on the upper part of the main body cover 1, The traveling clutch lever 21
(When the hand is released from the grip portion 4a and the traveling clutch lever 21 is pivoted upward), the wire is pulled upward, and the traveling clutch arm 5 is accordingly pulled.
The tip of 4 rotates upward, and with this rotation, the boss member 52, the bearing 33, and the disk 34 rotate integrally, and the friction plate 35 and the disk 34 separate. As a result, power transmission to the spline shaft 37 is cut off.

During the clutch disengagement operation, the friction plate 35 separated from the disk 34 attempts to return to the traveling stop set position N 'by the biasing force of the springs 45.
Since the urging force of the springs 45 exceeds the braking force of the friction member 50b in the link mechanism of the traveling shift lever 18, the traveling shift lever 18 returns to the stop area N, and the friction plate 35 is also set to stop traveling. Return to position N '. Therefore,
Next, when a clutch engagement operation is performed, the friction plate 35 first comes into contact with the idle wheel 85a to prevent the friction plate 35 from suddenly starting to rotate, thereby preventing sudden start.
Safety is ensured.

Next, the transmission mechanism (snow removal transmission mechanism) to the snow removing section will be described with reference to FIGS. 4, 5, 8 to 10 and the like. As described above, the snow removing drive pulley 23b is formed on the drive pulley 23, and the snow removing tension arm 58 is provided. The snow removing tension arm 58
As shown in FIGS. 5 and 8, the tension spring 60 is connected to a spring receiving member 61 protruding from the inner surface of the main body cover 1,
It is biased to the belt pressing side. Further, a snow removal driven shaft 62 is axially supported in the body cover 1 in the front-rear direction, and a clutch pulley 63 is rotatably mounted around the shaft via a bearing. In the clutch pulley 63, a snow removal driven pulley 63a is formed at a position below the snow removal drive pulley 23b, and inside the multiple pulley clutches 72a and 72b (collectively, multiple clutch 7
2), and the multiple disc clutch 72 and the clutch pulley 63 can be integrally rotated. A snow removal drive belt 64 is wound around the snow removal driven pulley 63a from the snow removal drive pulley 23b, and the snow removal tension arm 5
The snow removing tension pulley 59 pivotally supported by the roller 8 presses the snow removing transmission belt 64 to apply tension.

The snow removal driven shaft 62, which is the rotation shaft of the brake pulley 63, is inserted into the blower cover 6 as shown in FIG. A snow removal drive extension shaft 74 is connected to this, and a worm 74a is attached to the tip thereof.
4 and 8, in a worm box 75, meshes with a worm wheel 76a attached to an auger rotating shaft 76. The auger rotating shaft 76 is supported laterally in the snow removing cover 8.
In FIG. 6, as shown in FIGS. 1, 2 and 4, a snow scraper plate 77 is arranged radially to form an auger for snow scraping. Thus, the snow removal driven shaft 62 is driven to rotate by the belt transmission, and the blower 73 and the augers (76, 77) of the snow removal part are driven to rotate.

By the way, conventionally, the transmission of the auger and the blower of the snow removing section to the rotational drive is interrupted by a tension clutch structure for separating the snow removing tension pulley 59 and the snow removing transmission belt 64 from each other. That is, by operating the snow removing clutch lever 22, the snow removing tension arm 58 is rotated against the tension spring 60 to loosen the snow removing transmission belt 64. However, in this case, the snow removal driven shaft 62 idles, and the blower and the auger do not immediately stop rotating. In addition, when a brake mechanism is provided which is normally separated from the belt (the snow removal transmission belt 64) and is pressed against the belt in conjunction with the clutch disengagement operation, the braking performance is not stable, and the braking is not performed. However, the rotational drive of the blower and auger does not stop suddenly. Such an idle state of the blower and the auger is dangerous. Further, in the case of the latter brake mechanism, the brake is pressed against the driven belt, so that the belt is easily broken or the like.

Therefore, as shown in FIGS. 4 and 9, the clutch pulley 63 and the snow removal driven shaft 62 are disposed within the clutch pulley 63 so that the blower and the auger of the snow removal unit can be stopped immediately after the power transmission of the snow removal unit is stopped. And a multi-disc clutch mechanism (a mechanism for disengaging the clutch and applying the brake) is interposed therebetween. First, in the clutch pulley 63, the clutch passive plate 70 is spline-fitted to the snow removal driven shaft 62 so as to face the multiple disc clutch 72a.
Is fixed. Further, friction plates 71a and 71b (generally referred to as friction plates 71) are provided so as to sandwich the multiple disc clutch 72b. Furthermore,
In front of the clutch passive plate 70, the snow removal driven shaft 6
2 is rotatably and slidably loosely fitted to the clutch bracket 67 and further rotatably loosely fitted to the fixed cam member 66 in front of the clutch bracket 67. The fixed cam member 6
6 is fixed in position in the main body cover 1.

A pressing spring 68 is connected between the clutch bracket 67 and the clutch passive plate 70, and the clutch bracket 67 penetrates the clutch passive plate 70 and the friction plates 71a and 71b. As described above, the sliding member 69 extends rearward, and the stopper 69a is provided at the rear end of the sliding member 69. When the clutch is engaged, the clutch bracket 67 and the sliding member 69 are urged forward (to the left in FIG. 9) by the urging force of the pressing spring 68, and the stopper 69 of the sliding member 69 is pressed.
a pushes the friction plate 71 and the multi-plate clutch 72 forward (to the left in FIG. 9), and the clutch passive plate 70
・ Multi-plate clutch 72a ・ Friction plate 71a ・
The multiple disc clutch 72b and the friction plate 71b are in close contact. As a result, the clutch passive plate 70 and the clutch pulley 63 are integrated, and the clutch passive plate 70 and the snow removal driven shaft 62 are integrated, so that the clutch pulley 63 and the snow removal driven shaft 62 rotate integrally. Things.

An inclined cam surface is provided on the rear surface of the fixed cam member 66.
A movable cam member 65 is rotatably engaged on a boss portion on which the snow removal driven shaft 62 is loosely fitted. The front end of the movable cam member 65 is engaged with the inclined cam surface on the rear surface of the fixed cam member 66 by the rotation of the movable cam member 65.
A separated cam surface is provided. The movable cam member 65 is
As shown in FIG. 8, the spring is urged toward the clutch OFF state by a spring 65a, and a wire is connected to the snow removal clutch lever 22. In this embodiment, the snow removal tension arm 58 and the snow removal clutch lever 22 are not wire-connected, and the snow removal tension pulley 59 is not used.
Is a constant tension that is not interlocked with the operation of the snow removal clutch lever 22.

When the snow removing clutch lever 22 is turned on (holding the snow removing clutch lever 22 together with the grip portion 4a of the handle 4), the movable cam member 65 is pulled by a wire as shown by an arrow in FIG. The cam surface of the fixed cam member 66 and the cam surface of the movable cam member 65 are engaged, and the brake shoe 65b attached to the rear surface of the movable cam member 65 is separated from the clutch bracket 67, and the clutch passive plate 70, friction The clutch pulley 63 and the snow removal driven shaft 62 are integrated via the plate 71 and the multi-plate clutch 72. The clutch bracket 67 rotates integrally via a sliding member 69 as the clutch passive plate 70 that is in close contact with the multiple disc clutch 72a rotates.

On the other hand, the snow removing clutch lever 22 is turned off.
When the operation is performed (the hand is released and the snow removing clutch lever 22a is rotated upward), the movable cam member 65
With the urging force of b, the cam surface is rotated to the position indicated by the two-dot chain line in FIG. 8, and the cam surface is separated and slid rearward, that is, toward the right side in FIG. As a result, the brake shoe 65b attached to the rear surface of the movable cam member 65 is
To brake the clutch bracket 67. As a result, the clutch passive plate 70 that rotates integrally via the sliding member 69 is braked. Simultaneously, the clutch bracket 6 is pushed by the brake shoe 65b.
7, against the forward urging force of the push spring 68,
That is, since the sliding member 69 slides leftward in FIG. 9, the sliding member 69 slides rearward, that is, rightward in FIG. 9, so that the clutch passive plate 70 and the stopper 69 a of the sliding member 69 move between each other. As a result, the clutch passive plate 70, the friction plate 71, and the multiple disc clutch 72 are separated from each other, and the transmission between the clutch pulley 63 and the snow removal driven shaft 62 is cut off. Thus, the transmission from the clutch pulley 63 to the snow removal driven shaft 62 is cut off, and at the same time, the snow removal driven shaft 62 is braked by the braking of the clutch passive plate 70, so that the blower 73 and the augers (76 ) Stops driving without idling. And the snow removal driven shaft 6
Even when the brake 2 is braked, the clutch pulley 63 is held in the idling state, so that a braking load is not applied to the snow removal transmission belt 64, and the breakage of the belt can be avoided.

Next, the ground pressing mechanism of the traveling device by operating the snow removal height adjusting lever 19 will be described with reference to FIGS. 3, 6, 10, 12, 15 to 17, and the like. The snow removing height adjusting lever 19 is connected to a sliding rod 79 arranged vertically. That is, as shown in FIG.
A pivot 81a is provided on a rotating plate 81 that rotates back and forth with a pivot fulcrum shaft 82 as a fulcrum, and the base end of the snow removal height adjustment lever 19 is pivotally supported on the pivot 81a so as to be able to turn left and right. . This is the same as the configuration in which the traveling speed change lever 18 is connected to the connection rod 48 via the rotation plate 49 (shown in FIG. 13).

The sliding rod 79 slidably passes through a through hole provided in a connecting member 78 fixed to the rear frame 14 of the traveling device. Above the connecting member 78, a pressing spring 80 is screwed onto the sliding rod 79,
The upper end of the pressing spring 80 is connected to a stopper ring 80a slidably mounted on the sliding rod 79, and the lower end thereof comes into contact with a connecting member 78.
The sliding rod 79 is wound between the stopper spring 80a and the connecting member 78 so as to be wound around the pressing spring 80.
The stopper collar 80b is slidably mounted on the stopper collar 80b.
Therefore, by the compression of the pressing spring 80, the space between the stopper ring 80a and the connecting member 78 is reduced by the stopper collar 80b.
Is contracted as far as it comes into contact with the stopper ring 80a.

In the sliding rod 79, a stopper pin 79a protrudes above the connecting member 78, and a stopper washer 79b is provided below the connecting member 78 near the lower end thereof. I have. The upper sliding limit of the stopper ring 80a with respect to the sliding rod 79 is a position where it comes into contact with the stopper pin 79a, and the lower sliding limit of the stopper collar 80b is a position where it comes into contact with the upper end of the connecting member 78. Further, the lower sliding limit of the connecting member 78 with respect to the sliding rod 79 is a position where the lower end abuts on the stopper washer 79b. Therefore, due to the restoring force of the pressing spring 80, the connection between the stopper ring 80a and the stopper collar 80b can be extended as long as the connecting member 78 comes into contact with the stopper washer 79b.

The sliding rod 79 moves up and down with the turning operation of the snow removing height adjusting lever 19, and moves downward as it turns toward the front end of the guide groove B.
Along with the movement of the slide rod 79, a stopper pin 79a integral with the slide rod 79 moves, and a connecting member 78 having a pressing spring 80 interposed between the stopper pin 79a and the stopper pin 79a moves up and down together with the stopper pin 79a. . Although the connecting member 78 is integral with the traveling device, the traveling device can swing up and down with respect to the main body (snow-removing portion) with the drive shaft 11 as a fulcrum. Thus, the traveling device swings up and down with respect to the main body with the drive shaft 11 as a fulcrum.
Then, by fixing the snow removing height adjusting lever 19 to any one of the snow removing height setting steps Ba to Bd in the guide groove B, the vertical height of the connecting member 78 is set. The vertical angle with respect to the main body with the drive shaft 11 as a fulcrum is set. The setting of the vertical angle is the setting of the snow removal height. Snow removal height adjustment lever 19
Is fixed to the snow removal height setting step Ba at the front end of the guide groove B, the snow removal portion in front of the main body portion is at the lowest angle with respect to the traveling device with the drive shaft 11 as a fulcrum, and the snow removal height is the lowest. Is set. Also, the snow removal height adjustment lever 19 is
When the snow removing section is fixed to the snow removing height setting step Bd at the rear end of the guide groove B, the snow removing section becomes the most upward angle with respect to the traveling device with the drive shaft 11 as a fulcrum, and is in a non-snow removing state. For example, when the vehicle is running during non-snow removal work, it may be set to the snow removal height setting step Bd. In the snow removal height setting stages Ba, Bb, and Bc, an upward pushing force is applied to the handle 4 via the sliding rod 79 by the restoring force of the pushing spring 80, and the drive shaft 1
On the other hand, a downward force is applied to the snow removing section located forward of the drive shaft 11 with the vertical pivot point 1.
This is the contact pressure of the snow removal part.

The difference between the snow removing height adjusting mechanism of the present embodiment and the conventional one is that the traveling device and the main body are conventionally integrated, whereas the traveling device is attached to the main body (snow removing portion). The point is that the snow removal height is maintained by maintaining the swingable state. For example, as shown in FIG.
9 is fixed to the snow removal height setting step Ba, and when the snow removal height is set to H, it is assumed that the front part of the traveling device is inclined upward after riding on the stone S on the road. In the case of a conventional snow removing machine, the traveling device and the main body (snow removing section) are integrated via a foot pedal. In this case, the main body and the snow removing section also face upward, and snow removal remains. However, in this embodiment, the connecting member 78 swings downward integrally with the traveling device, while the sliding rod 79
Further, since the pressing spring 80 extends with the downward swing of the connecting member 78, it does not follow the downward swing of the connecting member 78. Further, the sliding rod 79
Still retains the restoring force, so that the contact pressure of the snow removing section is maintained and does not rise. Thus, even if the traveling device rides on the stone S, the snow removal height H is maintained.

Further, as shown in FIG. 17, when the rear portion of the traveling device is on a stone and the front portion thereof is directed downward, even if the connecting member 78 swings upward together with the traveling device, the pressing spring is moved. 80 is compressed, the sliding rod 79 does not follow the connecting member 78, and the pressing force of the pressing spring 80 keeps the snow-removing portion under the ground contact pressure. Even in this case, the snow removal height H is maintained.

[0054]

According to the present invention, since the snow blower is configured as described above, the following effects can be obtained. That is, since the friction disk type continuously variable transmission mechanism employed in the traveling transmission unit is configured as in claim 1, a rotational force is originally applied from the center of the disk to the outer peripheral side, and from the low speed position side to the high speed position side. By biasing the friction plate having a sliding tendency toward a pressing position on the disk at which the friction plate stops rotating, the sliding load of the friction plate from the high speed side to the low speed side is reduced. Therefore, the operation of sliding the friction plate while being pressed against the disk becomes possible, and there is no need to perform the on / off operation of the traveling clutch when changing the traveling speed or switching the traveling direction, thereby simplifying the operation and avoiding erroneous operation. Is done. Conversely, the friction plate that presses against the disk tends to slide from the low speed side to the high speed side, so if the traveling speed change lever is not fixed, the traveling speed change lever also rotates from the low speed side to the high speed side. Although it is a continuously variable transmission mechanism, it was necessary to actually fix the lever to some set stages, but by urging the friction plate from the high speed side to the low speed side This offsets the tendency of the traveling speed change lever to rotate from the low speed side to the high speed side, so that the traveling speed change lever can be fixed at any shift position, so that the original continuously variable speed change can be achieved. Operation becomes possible.

In the snow blower employing such a friction disk type continuously variable transmission mechanism, the friction plate is formed into a disk when the friction plate is set at the travel stop setting position by the structure of the idle wheel. Without following, the rotation is immediately stopped by pressing against the idling plate that has stopped rotating, and the traveling device immediately stops driving. On the other hand, the power is transmitted to the disk, and the disk rotates idle irrespective of the idler, and when the vehicle stops running, no excessive force is applied to the transmission mechanism from the internal combustion engine to the disk. Can be avoided.

Further, in the snow blower employing such a friction disk type continuously variable transmission mechanism, the friction disk and the disk can be connected to each other even if the clutch is disengaged in a high-speed running state. Since the friction plate returns to the traveling stop position with the biasing force during the separation of, the next time the clutch is turned on,
The friction plate is pressed against the disk in the traveling stop position, so that the friction plate does not rotate suddenly, so that a sudden start can be avoided, and it is safe.

Further, with the configuration as described in claim 4, the traveling speed change lever always pushes against the pressing portion when it rotates backward from the forward range or forward from the low speed reverse range. Since the vehicle stops in the stop area, the vehicle is safely switched from the forward state to the reverse state or from the reverse state to the forward state at once. Also, when switching from the low-speed reverse state to the high-speed reverse state, the lever is not pressed and the speed does not increase at a stretch, and the danger that the snow removal machine suddenly reverses at a high speed and collides with the worker can be avoided.

In addition, since the rotation of the auger and the blower of the snow removing unit is stopped when the clutch is operated when the rotation of the auger and the blower is stopped, the driven shaft of the belt transmission mechanism is simultaneously braked and stopped. The driving members of these snow removing units do not run idle and stop driving immediately, thereby improving safety.

The sliding rod is slidable even if the traveling device rides on an obstacle such as a stone on the road surface and swings up and down, so that the traveling device is connected. Does not follow the vertical swing of the part, so the main body and the snow removal part also
It does not follow the vertical swing of the traveling device. Further, regardless of the swing of the traveling device, an upward push-up force is applied to the handle at the rear portion of the main body portion via the sliding rod by the push spring, and the front end portion of the traveling device, which is the vertical swing fulcrum, is correspondingly provided. A downward pressing force is applied to the snow removing portion located further forward, and the downward pressing force is held as the ground pressing force. Therefore, when the traveling device swings up and down, the snow removing portion loses the ground pressing force and the snow removing portion rises from the snow surface. Not at all. Therefore, the snow removal height can be kept constant regardless of the unevenness of the road surface, thereby improving the efficiency of the snow removal operation. In setting the snow removal height, the snow removal height adjustment lever is manually operated. Unlike the conventional snow removal height setting operation of operating the pedal with one foot on the snow surface, the operation is safe, and the snow removal height can be switched during the snow removal work (while running). .

[Brief description of the drawings]

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

FIG. 2 is an overall plan view showing a state where an engine unit, a handle unit, and a chute unit are removed.

FIG. 3 is a side sectional view showing a friction disk continuously variable transmission mechanism in a traveling section of the snow blower.

FIG. 4 is a partial cross-sectional side view showing a traveling transmission mechanism from a spline shaft 37 to a drive shaft 11 and a snow removal transmission mechanism of the snow blower.

FIG. 5 is an internal plan view showing a traveling transmission mechanism and a snow removal transmission mechanism of the snow blower.

FIG. 6 is a plan cross-sectional view of an idling mechanism portion provided at the center of the disk in the traveling transmission mechanism of the snow blower.

FIG. 7 is a rear view showing a traveling transmission mechanism of the snow blower.

FIG. 8 is a front view showing a snow removal transmission mechanism of the snow blower.

FIG. 9 is a side sectional view of the multiple disc clutch mechanism between the brake pulley 63 and the snow removal driven shaft 62.

FIG. 10 is a perspective view of the vicinity of the operation box 5;

11 is a plan view of a guide groove A of the traveling speed change lever 18. FIG.

FIG. 12 is a plan view of a guide groove B of the snow removing height adjusting lever 19.

FIG. 13 is a side view showing a coupling mechanism of the traveling speed change lever 18.

14 is a plan view of a rotation fulcrum shaft 50 in FIG.

FIG. 15 is a side view showing a connection mechanism of the snow removal height adjustment lever 19;

FIG. 16 is a schematic side view of the snow plow showing how the snow removal height is maintained when the traveling device is inclined upward.

FIG. 17 is a schematic side view of the snow plow showing how the snow removal height is maintained when the traveling device is inclined downward.

[Explanation of symbols]

 E engine 1 body cover 4 handle 5 operation box A guide groove B guide groove 11 driven shaft 13 driven sprocket 14 rear frame 15 driven sprocket 16 crawler 18 running speed change lever 19 snow removing height adjusting lever 21 running clutch lever 22 snow removing clutch lever 34 circle Plate 35 Friction plate 36 Connecting ring 42 Running speed change shaft 43 Friction plate connecting arm 44 Spring arm 45 Spring 46 Spring receiving member 47 Connecting arm 48 Connecting rod 62 Snow removing driven shaft 63 Clutch pulley 63a Snow removing driven pulley 64 Snow removing transmission belt 65 Movable cam member 65a Brake shoe 66 Fixed cam member 67 Clutch bracket 68 Push spring 69 Sliding member 70 Clutch passive plate 71 Friction plate 72 Multi-plate clutch 73 Blower 74 Snow removal drive extension shaft 76 Auger rotating shaft 77 Snow scraper plate 78 Connecting portion 79 Sliding rod 79a Stopper pin 79b Stopper washer 80 Push spring 80a Stopper ring 80b Stopper collar 85 Idling member 85a Idling plate 85b Idling portion 85c Idling shaft portion

Claims (6)

[Claims] 1. A structure in which an outer peripheral end of a friction plate is pressed against a surface of a disk that is driven and rotated by an output shaft of an internal combustion engine, and a rotational force of the friction plate is transmitted to a drive shaft of a traveling device. By changing the pressing position of the friction plate on the surface of the disk by rotating the traveling speed change lever in the chord direction of the surface of the disk,
In a snow removing machine in which a snow removing section is connected to a traveling section having a friction plate type continuously variable transmission mechanism having a structure for performing forward and backward and stop operations of the traveling device and a continuously variable transmission operation, the traveling stop setting position is provided. By biasing the friction plate toward the pressing position on the disk, it is not necessary to separate the disk and the friction plate when the traveling shift lever is rotated. snowblower. 2. The snow removal machine according to claim 1, wherein a free-rotating wheel that is rotatable independently of the disk is provided at the travel stop setting position in a pressing portion of the friction plate on the surface of the disk. A snowplow characterized by that. 3. A snow removing machine according to claim 1, further comprising a clutch mechanism for separating said disc and said friction plate by a clutch disengagement operation, wherein said friction plate is urged by said urging force by said clutch disengagement operation. A snow blower that returns to the travel stop setting position. 4. A switch between forward and reverse and traveling by rotating a traveling speed change lever along a guide groove set such that a front portion is a forward region, a rear portion is a reverse region, and a front and rear intermediate portion is a stop region. In the snow blower having a structure for performing a shift, a portion where the traveling shift lever rotated backward from the forward region is pressed against the stop region of the guide groove, and the traveling shift lever rotated forward from the reverse region. A portion to be pressed, wherein the front portion of the reverse region is a low-speed reverse region, and the rear portion is a high-speed reverse region, and the running is rotated backward from the low-speed reverse region toward the high-speed reverse region at a boundary between both regions. A snowplow comprising a portion pressed by a shift lever. 5. A snow removing machine comprising a running section on which an internal combustion engine is mounted and a snow removing section having an auger and a blower connected thereto.
A brake mechanism for braking the rotary drive shaft is provided in conjunction with a clutch disengagement operation of a belt transmission mechanism provided between the output shaft of the internal combustion engine and the rotary drive shaft of the auger and blower of the snow removing section. Snowplow. 6. A snow removing machine having a configuration in which a front end of a traveling device is mounted as a vertical swing support point in front and rear portions of a main body portion in which a snow removing portion is integrally formed with a front portion, and is formed at a rear portion of the main body portion. A sliding rod is slidably connected to a connecting member at the rear end of the traveling device by a snow removing height adjusting lever provided on a handle to be provided, and a pressing spring is provided between the connecting member and a stopper pin provided with the sliding rod. A snowplow characterized by being interposed.