JP2015048699A - Snow plow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for detecting the blowing direction of a shooter for a walking type snow blower.SOLUTION: A mechanism by a worm gear A1 and a worm wheel A2 by an electric actuator is selected now as an electric mechanism for a shooter, and an angle or rotating-speed sensor is additionally arranged so as to cooperate with the operation of the actuator while the mechanism is used as it is, so that the swivel angle of the shooter can be detected by detecting the rotating speed of the actuator.

Description

  The present invention relates to a technology for detecting a snowing direction of a shooter in a rotary snowplow that uses snow to collect snow removed from a walking type snowplow.

Aside from riding-type snowplows used on public roads and public facilities managed by the country and prefecture, pedestrian snowplows are now widely used for the individual small mouths in snowy regions. Especially in mountainous areas and mountainous areas where passenger-type snowplows cannot enter, demand is now as high as the necessities of snowy countries. Traditionally, snow removal using this snowplow has been done by adult boys, but gradually it has become a declining birthrate and an aging population. Along with this, various contrivances and improvements in operability have been made by manufacturers so that elderly people and women without physical strength and strength can perform snow removal work as well as skilled men. However, operability improvements and improvements so far have been mainly focused on snow removal parts (automatic horizontal, automatic snow removal, etc.) and traveling parts (automatic speed control, etc.), and snow throwing operations have hardly progressed. The latter is due to technical difficulties such as detection of snow throwing direction and snowfall distance detection required for control.

2-136122 JP-A-10-219644 JP 6-23445

The snow throwing direction detection has been made public as an idea up to now, both mechanically (Patent Document 2) and electrically (Patent Document 1), but has not yet been realized without a technical basis. Since the snow throwing operation by the shooter has been facilitated by the electric drive of the shooter (Patent Document 3), some of the devised electric mechanisms have become a mechanism by the worm gear (actuator side) and worm wheel (shooter side) today By realizing a sensor capable of detecting the snow throwing direction, that is, a shooter turning sensor, it contributes to further improvement of snow throwing operability.

Means taken in the present invention to solve the above-mentioned problems include a prime mover, an auger that cuts and collects snow, a blower that discharges snow, a shooter that determines the snow throwing direction, and a snow throwing distance. A snow remover that constitutes a snow removal portion with a shooter deflector, wherein the shooter is driven by an actuator such as a motor or an electric cylinder so that the shooter can turn in the left-right direction with respect to the traveling direction of the machine body. The angle or the rotational speed sensor connected to the actuator so as to be linked to the operation of the actuator can detect the snow throwing direction angle in the left-right direction with respect to the aircraft traveling direction.

  The present invention has the following effects by applying the above means.

  This is the first snowplow that can implement a shooter's turning angle sensor, enabling snow throwing control not previously addressed.

Since it is only additionally connected to the conventional actuator, there is no need to change the conventional shooter turning mechanism, so the cost increases only slightly.

1 is an overall view showing a walking rotary snow remover. It is a right perspective view which shows the structure of a shooter. It is a fragmentary figure which shows the part which accommodates the actuator, sensor, etc. which rotate a shuter. It is a figure which shows the structure of the sensor which detects the turning angle and the actuator which carries out turning operation | movement of a shuter. It is a figure which shows the turning angle range of a shooter.

In the practical application of the present application, priority was given to stability and reliability rather than seeking accuracy for detection of the shooter turning angle, which is the first time for a walk-type snowplow. First, the sensor mechanism has been used as it is without changing the proven actuator mechanism that has been used in the past. As the angle or rotation speed sensor for detecting the rotation speed of the actuator, a non-contact multi-rotation potentiometer of Hall IC type that hardly deteriorates in durability of a sensor element that has started to spread in recent years was used. For the connection with the actuator, a bevel gear made of a duracon material made of resin having a flexible mesh and self-lubricating was used. As a result, it could be put into practical use at a low cost.

  Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of the snowplow as viewed from the snow removal side (upper figure) and the control side (lower figure). The snow remover scrapes or removes snow with the normal auger 11 of the snow removal unit 1 and collects and collects it in the center. The blower (not shown) in the center of the auger 11 rotates at high speed and blower peripheral speed. Then, the snow is discharged onto the place intended by the operator by the shooter 13 which is a snow discharge cylinder. The snow throwing operation during the snow removal operation is performed by operating the left / right direction and the snow throwing distance with the shooter cross lever switch 41 on the operation panel 4. These augers, blowers, and shooters are mounted on the upper body 2 together with other control parts and a prime mover (not shown). On the other hand, a crawler 31 for moving the snowplow and a traveling mission (not shown) are mounted on the lower body 3.

  FIG. 2 shows a basic configuration of the shooter 13 when viewed in a different direction from FIG. The shooter main body 131 is supported by a blower projecting opening of the auger case 12 (not shown) in a thrust bearing shape (cylindrical surface thrust sliding bearing) so as to be able to turn. . The tip of the shooter has a link mechanism with one joint for small machines and two joints for medium and large machines, and most of them are now electrically operated to adjust the snow throwing distance. At present, this part is called a deflector 132, particularly separated from the shooter body. FIG. 1 shows the link operation state of the deflector 132 at the time of long throwing, and FIG.

  3 and 4 show an actuator mechanism for turning the shooter 13 and a shooter turning sensor mechanism for detecting the turning angle position. The shooter turning actuator A is mounted and fixed on the actuator bracket 122 fixed on the auger case 12 so that the fixed position can be finely adjusted, and the shooter turning sensor S is mounted on the sensor bracket 123 additionally fixed on the actuator bracket 122 so that the fixed position can be finely adjusted. It is fixed. They are entirely covered with an actuator / sensor cover 121 including other devices to protect against obstacles, and are removably fixed to the auger case 12.

  The slewing mechanism of the shooter 13 is a worm gear A1 attached to the output shaft of the actuator A, drives the worm wheel A2 fixed to the bottom of the shooter body 131, and swings the shooter 13 left and right by forward and reverse rotation of the actuator A. Let Forward / reverse operation of the actuator A is performed by a shooter cross lever switch 41 (FIG. 1) on the operation panel 4. The above is the mechanism currently used in most walking snowplows. At the beginning of the electrification development competition, the spur gear type, the bevel gear type, and so on were devised by various companies, but at present, this method is hesitant.

  The shooter turning sensor mechanism for detecting the turning angle position of the shooter 13 has been invented with the shooter turning operation mechanism that has been proven for many years as it is. The basic structure is that the sensor bracket 123 is additionally fixed to the original actuator bracket 122 so that the sensor S can be disposed, and the actuator bevel gear S2 is provided on the outer side of the actuator bracket 122 on the rotating shaft of the worm gear A1 and on the input rotating shaft of the sensor S, respectively. The sensor bebe-hel gear S1 is fixed and meshed so that the rotation angle of the actuator A can be detected by the sensor S.

  The gear ratio between the worm gear A1 and the worm wheel A2, which explains the turning angle detection mechanism of the shooter 13, is approximately 16 rotations of the worm gear A1, and the shooter 13 rotates by 260 °, which is the entire turning angle. When the direction of travel of the snowplow is taken as the turning angle reference (0 °), the shooter 13 turns to the left (+) 130 ° by approximately 8 forward rotations of the worm gear A1 and to the right (−) 130 ° by approximately 8 reverse rotations. (FIG. 5) That is, the shooter 13 turns ± 130 ° with approximately ± 8 rotations of the worm gear A1. Here, when the gear ratio of the bevel gears S2 and S1 is 1: 2, a multi-rotation potentiometer of 10 rotations is used for the sensor S, and the shooter 13 is oriented in the aircraft traveling direction (turning angle 0 °), the potentiometer output center Fixed to be fixed in the value state.

With the above configuration, the sensor S rotates ± 4 by turning the shooter 13 by ± 130 °, and shows an output value corresponding to the turning angle at that time. In addition to the rotation conduction mechanism to the sensor S of the actuator A, several other attempts have been made such as direct coupling by coupling, spur gear mechanism, etc., but considering the ease of mounting adjustment and repairability, a bevel gear mechanism is used, and the material is durable and free Duracon with excellent slidability and wear resistance was used in consideration of maintenance. The rotational conduction accuracy is such that the sensor bracket 123 is additionally fixed to the original actuator bracket 122 with high accuracy, so that the positional accuracy is high and the gear meshing accuracy is extremely high. As the 10-rotation potentiometer of the sensor S, a non-contact Hall IC type sensor sensor, which has started to spread in recent years and has almost no durability deterioration, was used. It can be said that the present invention can be realized by the fact that it has been widely spread. Although it is functionally possible even with a conventional sliding contact type potentiometer, it is almost difficult to put it into practical use for a shooter with many vibrations and impacts in terms of stability and durability. The sensor S with a full range of ± 5 rotations is used with ± 4 rotations, because the limit turning angle ± 130 ° of the shooter 13 is reliably detected, and there is a margin of ± 1 rotation in consideration of failure safety. It is a thing.

It can be used for most of the current walking type rotary snowplows. In addition, it can be used in various places of work machines (such as small cranes and aerial work machines) that turn by a similar worm gear drive.

DESCRIPTION OF SYMBOLS 1 Snow removal part 2 Upper machine body 3 Lower machine body 4 Operation panel 11 Auger 12 Auger case 121 Actuator sensor cover 122 Actuator bracket 123 Sensor bracket 13 Shuta 131 Shuta body 132 Deflector 31 Crawler 41 Shuter cross lever switch 51 Crawler A Shuter turning actuator S Shuta Rotation sensor A1 Worm gear A2 Worm wheel S1 Sensor bevel gear S2 Actuator bevel gear

Claims (2)

  An auger equipped with a prime mover that cuts and collects snow, a blower that discharges snow, a shooter that determines the snow throwing direction, and a shooter deflector that determines the snow throwing distance, and a snow remover that constitutes a snow removal unit, In a snowplow that is driven by an actuator so that it can turn in the left-right direction with respect to the aircraft traveling direction, the turning angle of the shooter is detected by an angle or rotation sensor that is conductively connected to be linked to the operation of the actuator. A snowblower configured to do so.   The snowplow according to claim 1, wherein the angle or rotation sensor is a non-contact multi-rotation type.