JP2020002674A - Walking-type snowplow - Google Patents

Abstract

To provide a walking-type snowplow which can accurately detect with a simple configuration that a switching lever has been switched to reverse.SOLUTION: A walking-type snowplow comprises: a machine body; a snow removal unit 10 provided at the front of the machine body for scraping snow; a switching lever 43 for switching between forward and reverse movement of the machine body; and a control unit 100 that automatically raises the snow removal unit 10 when the switching lever 43 is switched to reverse. A detection switch 48 is provided near the rotation fulcrum of the switching lever 43. When the switching lever 43 is switched to the reverse position, the detection switch 48 is pressed and turned on following the switching of the switching lever 43 to the reverse position, and the snow removal unit 10 is automatically raised.SELECTED DRAWING: Figure 4

Description

  The present invention provides an airframe main body, a snow removal unit provided in front of the airframe body and scraping snow, a switching lever for switching forward and backward of the airframe body, and switching the switching lever to reverse, the snow removal unit. And a control unit that automatically raises the height.

As this type of walking snow remover, there is one disclosed in Patent Document 1, for example.
This type of walking snow remover sometimes has a so-called back-auto lift function in which the snow removal section automatically rises when the switching lever is switched to reverse. This back auto lift function is used, for example, when the snow removal machine is finished and the snow removal machine is moved backward, the control unit that detects that the switching lever has been switched to the backward movement does not drag the auger of the snow removal unit. Raise the part automatically.

JP 2017-71969 A

As a conventional configuration for detecting that the switching lever has been switched to reverse, for example, a configuration in which a potentiometer that converts a rotation angle or a moving amount into a voltage is provided to detect the angle of the switching lever can be considered.
However, when a relatively expensive precision device called a potentiometer is used, the manufacturing cost increases, and it is difficult to accurately detect that the switching lever has been switched backward due to a variation in the angle of the switching lever due to a manufacturing error. There is.

  The present invention provides a walking snow plow capable of accurately detecting that a switching lever has been switched to reverse with a simple configuration.

The walking type snow plow according to the present invention comprises:
The fuselage body,
A snow removing unit provided in front of the body of the aircraft, for collecting snow;
A switching lever for switching between forward and backward movement of the aircraft body,
When the switching lever is switched to reverse, a control unit that automatically raises the snow removing unit,
A detection switch is provided near a rotation fulcrum of the switching lever,
When the switching lever is switched to the reverse position, the detection switch is pressed and turned on in accordance with the switching of the switching lever to the reverse position, and the snow removing unit is automatically raised.

  In the present invention, it is preferable that a cam member is provided on a base end side of the detection switch, and the detection switch is pressed by the cam member when the switching lever is switched to a reverse position.

  In the present invention, it is preferable that the detection switch includes a switch element and a pressing member that presses the switch element, and the cam member presses the switch element via the pressing member.

  In the present invention, it is preferable that a roller member for guiding the cam member is provided at a distal end portion of the pressing member.

  According to this configuration, the switching lever was switched to the reverse by a simple configuration of a combination of the cam member and the detection switch provided on the switching lever without using a relatively expensive precision device such as a potentiometer. It can be detected accurately.

It is a side view which shows the whole walking type snow plow. It is a top view showing the whole walk type snow plow. FIG. 5 is a rear view showing the lifting drive mechanism. It is explanatory drawing which shows the control system of a raising / lowering operation. It is a side view showing a cam member of a change lever and a detection switch. It is explanatory drawing which shows the operation | movement of the cam member of a switching lever, and a detection switch.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the entire walking snowplow according to the embodiment of the present invention. FIG. 2 is a plan view showing the entire walking snowplow according to the embodiment of the present invention. The direction of [F] shown in FIGS. 1 and 2 is “front side” of the body main body, the direction of [B] is “rear side” of the body body, and the direction of [L] is “left side” of the body body, [R]. Is defined as [right side] of the fuselage body.

  As shown in FIGS. 1 and 2, the walking snow remover includes a body frame 3 in which a body frame 1 is provided with a pair of left and right crawler traveling devices 2. The fuselage main body 3 includes a pair of left and right steering handles 4 provided at a rear portion, and is configured to be a walking type so as to travel and steer the body 3 while walking behind the fuselage main body 3. A snow removal unit 10 is disposed in front of the body 3. The engine 5 is arranged above the body 3 behind the snow removing section 10. The engine 5 is supported by the support frame 30 while being mounted on the support frame 30.

  The fuselage frame 1 includes a pair of left and right body frame front-rear track frames 20 and a horizontal connection frame portion 21. The connection frame portion 21 connects the rear portions of the left and right track frame portions 20.

  The left and right crawler traveling devices 2 are driven by a drive sprocket 23 that is drivably supported at the front end of the track frame portion 20, and a driven sprocket that is rotatably supported by the track frame portion 20 while being located behind the drive sprocket 23. A sprocket 24 and a crawler belt 25 wound around the driving sprocket 23 and the driven sprocket 24 are provided. Between the driving sprocket 23 and the driven sprocket 24, a stopper member 26 is engaged with the crawler belt 25. The retaining member 26 is supported by the track frame section 20. The left and right crawler traveling devices 2 and the snow removing unit 10 are driven by transmitting a driving force from the engine 5.

  As shown in FIGS. 1 and 2, the pair of left and right steering handles 4 extend upward and rearward from the left and right ends of the connection frame 21. The left and right handle support frame portions 22 are formed by plate members. The plate-shaped member is attached to the connection frame portion 21 in an attachment posture in which the plate thickness direction is the body width direction. The bases 4a of the left and right steering handles 4 are supported on the lateral sides of the handle support frame 22 on the lateral side of the body. The left and right steering handles 4 are constituted by round pipe members. The base portions 4a of the left and right steering handles 4 are subjected to a pressing deformation process in a state where a part of the outer peripheral surface is flat. The base 4a is connected to the handle support frame 22 with a flat surface along the side surface of the handle support frame 22. In the present embodiment, the base 4a and the handle support frame 22 are connected by connecting bolts. The connecting means between the base 4a and the handle support frame 22 is not limited to the connecting bolt, but may be welding.

  A grip 4b is provided at the extended end of the left and right steering handles 4. The grips 4b of the left and right steering handles 4 extend in the front-rear direction of the body 3 of the aircraft. A portion between the grip portion 4b and the base portion 4a of the left and right steering handles 4 is connected by a reinforcing rod 41. The left and right steering handles 4 reinforce each other by supporting each other by the connection with the reinforcing rod 41. An operation panel 42 is supported between the left and right steering handles 4.

  The support frame 30 is supported by the body 3 so as to be able to swing up and down with the rotation axis of the drive sprocket 23 of the left and right crawler traveling devices 2 as the swing axis Z. The support frame 30 includes an operation arm 31 extending rearward from a rear portion of the support frame 30. An elevating drive mechanism 32 is provided over the extended end of the operation arm 31 and the body frame 1. The elevating drive mechanism 32 is driven to adjust the swing of the support frame 30 up and down with respect to the body frame 1, and is stopped to fix the support frame 30 at the adjusted swing position.

  By operating the lifting / lowering drive mechanism 32, the snow removal unit 10 can be adjusted vertically with respect to the body 3 and the height of the snow removal unit 10 with respect to the ground can be adjusted. In order to adjust the height of the snow removing unit 10 to the ground, the support frame 30 swings up and down with the rotation axis of the driving sprocket 23 of the left and right crawler traveling device 2 as the swing axis Z, and the snow removing unit 10 and the engine 5 are rotated. And a traveling transmission (not shown) integrally swings up and down with the rotation axis of the left and right drive sprockets 23 as the swing axis Z, so that the work transmission system for transmitting the driving force from the engine 5 to the snow removing unit 10. Also, there is no need to provide a special interchangeable structure for allowing the snow removing unit 10 to move up and down in the traveling transmission system that transmits the driving force from the engine 5 to the left and right crawler traveling devices 2. Further, even if the height of the snow removing unit 10 is changed, the attitude of the body 3 is not changed, and the attitude of the steering wheel 4 is not changed.

  As shown in FIG. 3, the lifting drive mechanism 32 includes a rack gear 33, a pinion gear 34, and an electric motor M. The rack gear 33 and the pinion gear 34 mesh with each other.

  The rack gear 33 is supported by the body 3 so as to protrude upward from the body frame 1. Specifically, a lower end of a member 33a provided with the rack gear 33 is rotatably supported by the bracket 85 via a support shaft 78b. The bracket 85 is supported by the connection frame 21 of the body frame 1. The pinion gear 34 and the electric motor M are supported by a support member 35. The support member 35 is rotatably supported at the rear end of the operation arm 31 via a support shaft 35a.

  A guide groove 36 is provided in a member 33 a including the rack gear 33. A guide pin 37 slidably engaged with the guide groove 36 is supported by the support member 35. The guide pin 37 supports the retaining member 38. The retaining member 38 prevents separation between the rack gear 33 and the pinion gear 34 by preventing separation between the member 33a and the support member 35.

  The lifting drive mechanism 32 drives the pinion gear 34 by the driving force of the electric motor M, raises and lowers the pinion gear 34 along the rack gear 33, and raises and lowers the rear end side of the operation arm 31 to support the support frame. 30 is rocked.

  The elevating drive mechanism 32 and the battery 6 for the power supply are arranged in the lateral width direction of the body main body. The protrusion of the battery 6 backward from the lifting drive mechanism 32 can be suppressed. Further, the battery 6 is unlikely to become an obstacle when performing the work of inspecting and repairing the lifting drive mechanism 32 from the rear of the body of the machine.

  As shown in FIG. 2, the auger elevating switch 7 is supported by the right steering handle 4 in a state in which the auger switch 7 is located on the inside of the body of the grip portion 4b of the right steering handle 4. The auger elevating switch 7 is located at a position where a finger supporting the grip 4b can be operated. Specifically, a boss portion 71 is provided at a position on the front side of the grip portion 4b of the steering handle 4. A support member 72 extends rearward from the boss 71. The auger elevating switch 7 is supported on the extending end of the support member 72. In this embodiment, the auger lifting switch 7 is supported by the right steering handle 4, but may be supported by the left steering handle 4.

  In addition, the walking snow plow according to the present embodiment has a back auto-lift function in which the snow removal unit 10 automatically rises when the switching lever 43 that switches between forward and backward movement of the body 3 is switched to reverse movement. As shown in FIGS. 1 and 2, the switching lever 43 is provided on the operation panel 42. By operating the switching lever 43 in the front-rear direction, a hydrostatic continuously variable transmission (HST) ) Can be operated. That is, as the switching lever 43 is moved from the intermediate position of the slit portion 42a to the front side, the moving speed of the body main body 3 can be increased, and when the switching lever 43 is moved to the rear end portion of the slit portion 42a, The main body 3 can be moved backward.

  As shown in FIG. 5, a boss member 44 is provided at a lower end of the switching lever 43, and the boss member 44 is attached to a cam member 45. The cam member 45 is provided so as to be rotatable around a pivot axis of a mounting bolt 47 with respect to a bracket 46 which stands upright below the operation panel 42. Accordingly, the switching lever 43 is configured to be rotatable around the axis of the boss member 44 and to be rotatable around its pivot axis with the mounting bolt 47 as a rotation fulcrum.

  A detection switch 48 for detecting the angle of the switching lever 43 is provided near the mounting bolt 47 (rotation fulcrum) of the switching lever 43. The detection switch 48 in the present embodiment is provided near the mounting bolt 47 and diagonally below and behind the mounting bolt 47. As the detection switch 48 in this embodiment, a known microswitch of a hinge roller lever type is used, but the present invention is not limited to this. The hinge roller lever 48a of the detection switch 48 is biased to the off side.

  The detection switch 48 is provided on a support plate member 49, and the support plate member 49 is fixed to the bracket 46 with fixing bolts B. The support plate member 49 has an elongated hole A through which the fixing bolt B is inserted, so that the position of the support plate member 49 in the bracket 46 can be finely adjusted.

  As shown in FIG. 4, the auger lifting switch 7, the lever angle detection unit 101 of the detection switch 48, the traveling control unit 102 that controls the traveling state of the body main body, and the motor drive command unit 103 include the elevation control unit 100 (control unit). ).

  When the operation information is input from the auger elevating switch 7, the elevation control unit 100 moves the pinion gear 79 to the operation position on the ascending side and the descending side corresponding to the operation information based on the input operation information, and stops the electric motor. Control M.

  By pressing the front end portion of the auger lifting switch 7, the lifting control unit 100 controls the electric motor M to move downward via the motor drive command unit 103, and the snow removing unit 10 can be operated to move downward. By pushing the rear end portion of the auger elevating switch 7, the elevating control unit 100 controls the electric motor M to the ascending side via the motor drive command unit 103, so that the snow removing unit 10 can be operated to ascend. While the auger lifting switch 7 is being pressed, the snow removing unit 10 continuously moves up and down unless the snow removing unit 10 reaches the stroke end.

  Also, as shown in FIG. 6, when the switching lever 43 is switched to reverse, the cam member 45 provided on the switching lever 43 rotates around the pivot axis of the mounting bolt 47, so that the detection switch is turned on. At 48, a hinge roller lever 48a (corresponding to a pressing member and a roller member of the present invention) is pressed, and a switch portion 48b (corresponding to a switch element of the present invention) is pressed (see a two-dot chain line portion in FIG. 6). At this time, the roller member guides the cam member 45. As a result, the lever angle detection unit 101 of the detection switch 48 detects that the switching lever 43 has reached a predetermined angle (reverse position), the detection switch 48 is turned on, and the elevation control unit 100 sets the motor drive command unit 103 , The electric motor M is controlled to move upward, and the snow removing unit 10 automatically moves upward (see the solid line in FIG. 4).

The headlight 8 is provided on the operation panel 42.
A hydraulic oil tank 9 is supported by the body 3. Specifically, the hydraulic oil tank 9 is supported by the steering handle 4 via a lower reinforcing rod 41. The hydraulic oil tank 9 and HST (not shown) are connected by an oil supply path 90. The oil supply passage 90 is formed by a flexible hose and has flexibility. By storing the hydraulic oil in the hydraulic oil tank 9, the hydraulic oil is automatically supplied to the HST.

  The snow removing section 10 includes an auger housing 11 and a blower case 12 connected to a rear portion of the auger housing 11, and is supported by the support frame 30 by connecting the blower case 12 to a front end of the support frame 30. ing. An auger 13 is supported by the auger housing 11 so as to be rotatable. A blower 14 is housed in the blower case 12 so as to be rotatable. A shooter 15 projects upward from the blower case 12.

  A snow cutting bar 16 is provided over the entire left and right width of the auger housing 11. The snow cutting bar 16 shaves relatively high piled snow and drops it in front of the auger 13, thereby increasing the efficiency of the snow removing operation.

  The walking snow remover allows the snow removing section 10 to perform the snow removing operation by running the body 3. That is, the snow cut by the snow cutting bar 16 and raked by the auger 13 is discharged from the discharge port 15 a of the shooter 15 by the ejection power of the blower 14.

  The present invention provides an airframe main body, a snow removal unit provided in front of the airframe body and scraping snow, a switching lever for switching forward and backward of the airframe body, and switching the switching lever to reverse, the snow removal unit. And a control unit that automatically raises the snowfall.

1: body frame 2: crawler traveling device 20: track frame part 21: connecting frame part 22: handle support frame part 23: drive sprocket 24: driven sprocket 25: crawler belt 26: stopper member 3: body body 30: support frame 31: Operation arm part 32: Elevating drive mechanism 33: Rack gear 33a: Member with rack gear 34: Pinion gear 35: Support member 35a: Support shaft 36: Guide groove 37: Guide pin 38: Detachment prevention member 4: Steering handle 4a: Base portion 4b: grip portion 41: reinforcing rod 42: operation panel 42a: slit portion 43: switching lever 44: boss member 45: cam member 46: bracket 47: mounting bolt 48: detection switch 48a: hinge roller lever (pressing member).
48b: switch part (switch element)
49: Support plate member 5: Engine 50: Engine main body 51: Recoil starter 52: Starter rope 53: Starter grip 54: Fuel tank 55: Cylinder block 56: Carburetor 6: Battery 7: Auger elevating switch 71: Boss part 72: Support Member 8: Headlight 9: Hydraulic oil tank 90: Oil supply path 10: Snow removing section 11: Auger housing 12: Blower case 13: Auger 14: Blower 15: Shooter 16: Snow cutting bar 100: Elevating control section (Control section)
101: Lever angle detection unit 102: Travel control unit 103: Motor drive command unit A: Slot B: Fixing bolt M: Electric motor Z: Swing shaft center

Claims (4)

The fuselage body,
A snow removing unit provided in front of the body of the aircraft, for collecting snow;
A switching lever for switching between forward and backward movement of the aircraft body,
When the switching lever is switched to reverse, a control unit that automatically raises the snow removing unit,
A detection switch is provided near a rotation fulcrum of the switching lever,
When the switching lever is switched to the reverse position, the detection switch is pressed and turned on in accordance with the switching of the switching lever to the reverse position, and the snow removing section automatically rises, so that the snow removing device automatically rises.   The walking snow remover according to claim 1, wherein a cam member is provided on a base end side of the detection switch, and the detection switch is pressed by the cam member when the switching lever is switched to a reverse position.   The walking type snow plow according to claim 2, wherein the detection switch has a switch element and a pressing member that presses the switch element, and the cam member presses the switch element via the pressing member. The walking snow plow according to claim 3, wherein a roller member for guiding the cam member is provided at a tip end of the pressing member.

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