JP5309167B2 - Vehicle speed control method for snowplow for track with single-flow plow - Google Patents

Description

  The present invention relates to a vehicle speed control method for a track snowplow for removing snow on the track.

  When removing snow that has accumulated on the roadway and railroad track with a snowplow equipped with a plow (snow removal board) at the front end, if the snow is removed by removing the snow equally to the left and right with respect to the direction of travel with a V-type plow, side force is applied to the snowplow. (Lateral force) does not work, but when the snow is scraped only on one side with respect to the traveling direction in the single-flow plow, the side force works and tries to turn the vehicle in the direction opposite to the snow removal direction. As the snow removal amount or traveling speed increases, the snow removal resistance acting on the plow increases, and therefore the side force increases in the traveling direction. In snowplows for road surfaces such as roads, the driver always steers the vehicle against the side force in order to drive the vehicle straight, but in a snowplow for track use such steering Can not be derailed in some cases.

  In order to prevent this situation, the conventional snow blower manufactured and sold by the applicant measures the internal pressure of the hydraulic cylinder that opens and closes the front scraper blade (also called the right wing) and calculates the generated side force. Thus, control is performed to reduce the vehicle speed when a predetermined value is exceeded at a predetermined speed, and control is performed to reduce the vehicle speed to 30 km / h only when the vehicle speed exceeds, for example, 30 km / h. More specifically, the traveling speed is 30 km / h or more, the scraper blade is in a half-open or full-open position, and the resultant force of the side force due to the snow load on the single-flow plow and the side force due to the traveling meander (self-excited meander) When the derailment coefficient due to exceeds 0.8, the vehicle decelerates to 30 km / h (or a specified value). When the deceleration control is activated, the message “Speed is being limited” appears on the monitor display. To accelerate again after the deceleration control is completed, move the travel speed control lever to the travel speed position at the completion of the operation. Return and pull the lever again.

  In order to prevent dangers such as derailment due to side forces due to the snow removal resistance acting on the plow of the snowplow for a track, Patent Document 1 includes a plow provided obliquely to the vehicle on the front end side of the vehicle. In a snowplow for a track, an auxiliary wing whose front end protrudes in the vehicle width direction from the rear end of the plow is provided at the rear end of the vehicle at an angle with respect to the vehicle and on the rear end (either the left or right side of the plow) Thus, it has been proposed to distribute the side force acting in the width direction of the snow removal resistance acting on the plow. This is to add auxiliary wings to a conventional snowplow for a track, and an increase in manufacturing process and manufacturing cost is inevitable.

JP2002-212929

  An object of the present invention is to provide a snowplow vehicle speed control method for realizing a safe and efficient snow removal work without providing a new member to a conventional snowplow for a track.

  The above problem is a method for controlling the speed of a snowplow for a track equipped with a single-flow plow at the time of snow removal. When the limit side force corresponding to the snow removal load in the derailment coefficient in each speed region is specified, and the value of the side force related to the snow removal load exceeds the limit side force in the corresponding speed region This is solved by controlling the snowplow to decelerate until it falls below its limit side force.

  A variable scraper blade is attached to a single-flow plow, and when the scraper blade is tilted with respect to the traveling direction of the snowplow, the side force related to the snow removal load is detected by a sensor attached to the scraper blade. It is preferable to be adapted. It is more effective if the tail blade that acts to cancel the turning force acting on the snowplow by the single-flow plow is attached to the snowplow and the canceling force detected by the sensor attached to the tail blade is taken into consideration.

  The snowplow has a snowplow traveling speed control lever to be operated by the operator and a buzzer that notifies the operator of the deceleration control. When the deceleration control starts, the buzzer sounds and corresponds to the speed at which the deceleration control is completed. It is advantageous if the ringing continues until the speed control lever is returned to the position where it is to be moved.

  According to the present invention, the ratio of the snow removal load applied to the single-flow plow and the ratio of the traveling meander related to the derailment coefficient are changed according to the speed of the snowplow, and correspond to the snow removal load at the derailment coefficient in each speed region. Since the limit side force is defined, and the actual value of the side force related to the snow removal load exceeds the limit side force in the corresponding speed range, the snowplow is controlled to decelerate until it falls below the limit side force. Safe and efficient snow removal work is realized, and snow removal work can be completed in a short time even on routes with severe snow removal time.

  A variable scraper blade is attached to a single-flow plow, and when the scraper blade is tilted with respect to the traveling direction of the snowplow, the side force related to the snow removal load is detected by a sensor attached to the scraper blade. If this is done, the side force applied to the variable raking blade can be taken into consideration, and an appropriate snow removal operation is realized. Similarly, if a tail blade that acts to counteract the turning force acting on the snowplow with a single-flow plow is attached to the snowplow, and the canceling force detected by a sensor attached to the tailpump is taken into account, appropriate snow removal work can be performed. Realize.

  A snowplow traveling speed control lever to be operated by the operator and a buzzer for notifying the operator of the deceleration control. When the deceleration control is started, the buzzer rings and reaches a position corresponding to the speed at which the deceleration control is completed. If the above ringing continues until the speed control lever is returned, after the deceleration control is activated, the operator can easily know the appropriate lever operation when accelerating the snowplow again. is there.

It is a top view of the snowplow for track which performs speed control concerning the present invention. It is a side view of the snowplow for track of FIG. It is a graph which shows the speed control which concerns on this invention.

  First, FIGS. 1 and 2 show a snowplow for a track on which the control method according to the present invention is implemented. A snowplow 1 for a track that travels on a rail (not shown) by wheels 2 and 3 includes a driver's cab 4 and a power engine room 5 in a central region, a single-flow plow 6 is mounted at a fixed angle on the front, and a rear part is mounted. Is equipped with a connecting device 8 having three bending connectors 7.

  The single-flow plow 6 is attached with a scraping blade (right wing) 10 on the right side when viewed in the traveling direction of the snowplow 1 (left direction in FIG. 1), and the connecting device 8 is viewed in the traveling direction of the snowplow 1. The tail 11 is attached to the left side. The scraper blade 10 can be in three positions: closed, half-open, and fully open, and a proximity switch (not shown) disposed in the vicinity of the rotating shaft can detect which position is taken. . The position of the scraping blade 10 may be detected by a numerical value of a potentiometer arranged coaxially with the rotation axis. The tail blade 11 can take two positions, closed and open, and a proximity switch (not shown) arranged in the vicinity of the rotation axis is used to detect which position is taken. The position of the tail 11 may also be detected by a numerical value of a potentiometer arranged coaxially with the rotation axis.

In the snowplow for a track having such a configuration, control is performed by changing the ratio of the derailment coefficient by the side force of the running meander and the snow removal depending on the speed region. That is, for example, at 0 to 30 km / h, the running meander is 0, the snow removal is 0.8,
At 30 to 50 km / h, the running meander is 0.3, the snow removal is 0.5,
At 50-60 km / h, the running meander is 0.5, the snow removal is 0.3,
At 60 km / h or more, the traveling meandering amount is 0.6 and the snow removal amount is 0.2.

  In other words, when the vehicle weight is 30 t, for example, the lateral force that can be derailed is 24 t, and it is detected that the side force due to snow removal reaches 24 t without considering the influence of running meander up to 30 km / h. If the side force due to snow removal decelerates to less than 24 t, and it is detected that the side force due to snow removal has reached 24 × 0.5 / 0.8 = 15 t in the range of 30 to 50 km / h, snow removal is performed. The deceleration control is performed until the side force due to the pressure falls below 15t. A graph conceptualizing this is shown in FIG.

  In this example, the construction limit width (the width at which a general track vehicle can travel) is secured by taking the fully open or half open position of the scraper blade 10, so that the scraper blade 10 is in the fully open position or half open position in the snow removal work. The side force relating to the single-flow plow during the snow removal work is calculated based on sensing by a hydraulic pressure detection sensor attached to the scraping blade 10. When the scraper blade 10 is in the fully open position, the inclination of the scraper blade 10 with respect to the traveling direction of the snowplow 1 matches the tilt of the single-flow plow 6, and is due to the resistance during snow removal applied to the scraper blade 10 and the single-flow plow 6. The side force can be calculated simply. When the scraper blade 10 is in the half-open position, the side force due to the resistance at the time of snow removal applied to the scraper blade 10 and the single-flow plow 6 is similarly taken into consideration by considering a coefficient corresponding to the deviation from the inclination of the single-flow plow 6. Can be calculated. In the case of a type in which the opening degree of the scraping blade 10 can be arbitrarily set, it is possible to calculate the snow removal resistance, and thus the side force, based on the detected opening angle.

In the snowplow of this example, in addition to the variable scraper blade 10, the tail blade 11 is also opened and closed.
Only the scraping wings are half open,
Only the scraping wings are fully open,
Open the tail wings and rake half-open,
Sensor detection may be performed with four patterns of opening the tail blade and the scraper blade fully open, and in each combination, the side force at the resistance during snow removal may be calculated and controlled. That is, a hydraulic pressure detection sensor is also provided in the tail blade 11 to calculate the sum of the side force applied to the tail blade 11 when the tail blade 11 is opened, the side flow applied to the one-flow plow 6 and the scraping blade 10 (snow removal as a side force). Since the direction of turning on the vehicle is reversed, the relationship is “single-flow plow side force + scraper blade side force−tail blade side force”), and deceleration control is performed.

  If the snowplow speed is lowered to a level that is below the side force corresponding to the derailment coefficient ratio of the snow removal in the relevant speed range when the deceleration control is performed, the traveling speed control lever itself will be The operator needs to return the travel speed control lever to a position corresponding to the speed once lowered. In order to make it easy to recognize the return position, the buzzer sounds when the deceleration control is started, and the buzzer continues to sound until the lever is correctly returned to the return position even after the deceleration control operation is completed. Is good. If the operator returns the lever until the buzzer stops ringing and operates the lever again, the snowplow can be accelerated to a desired speed.

DESCRIPTION OF SYMBOLS 1 Snowplow for track 2, 3 Wheel 4 Driver's cab 5 Power engine room 6 Single flow plow 7 Bend coupling 8 Coupling device 10 Scraping blade 11 Tail

Claims (4)

  A method for controlling the speed of a snow plow with a single-flow plow at the time of snow removal, changing the ratio of the snow removal load on the single-flow plow and the ratio of the running meander related to the derailment coefficient according to the speed of the snow plow. The limit side force corresponding to the snow removal load corresponding to the derailment coefficient in each speed range is specified, and the limit when the actual value of the side force related to the snow removal load exceeds the limit side force in the corresponding speed range A method of controlling the snowplow to decelerate until it falls below the side force.   The control method according to claim 1, wherein a variable scraper blade is attached to a single-flow plow, and the scraper blade is attached to the scraper blade when the scraper blade is inclined with respect to the traveling direction of the snowplow. A control method, wherein a side force related to a snow removal load is detected by a sensor provided.   3. The control method according to claim 1 or 2, wherein a tail wing that acts to counteract the turning force acting on the snowplow with a single-flow plow is attached to the snowplow, and the cancellation is detected by a sensor attached to the tail wing. Control method characterized by considering force.   The control method according to any one of claims 1 to 3, wherein the snowplow includes a snowplow traveling speed control lever to be operated by the operator, and a buzzer for notifying the operator of deceleration control. A control method, wherein the buzzer sounds when deceleration control is started, and the sound continues until the speed control lever is returned to a position corresponding to the speed at which the deceleration control is completed.

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