JPH0529180Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a device for removing mud from tires of agricultural vehicles, etc., and more specifically, the invention relates to a device for removing mud from tires on agricultural vehicles, etc., and more specifically, the invention relates to a device for removing mud from tires on agricultural vehicles. This relates to a dropping device.

[Conventional technology]

In order to smoothly run on muddy roads, agricultural vehicles generally use lug tires having lugs (protrusions) on their peripheries that protrude significantly outward in the radial direction. However, when running with lug tires on soft, clay-like ground, especially uphill, mud tends to get stuck between the lugs, which can hinder running.

Therefore, in the mud removing device disclosed in Japanese Utility Model Application Publication No. 57-177862, instead of the mud removing plate 16, a lug tire 1 is used.
A cleaning brush that comes into contact with the circumference of the lug tire 10 is provided, and the cleaning brush is rotated in the opposite direction to the lug tire 10 to scrape off mud adhering to the circumference of the lug tire 10.

In addition, in the tire of Utility Model Publication No. 44-15303,
The mud scraper blades are rotated in synchronization with the rotation of the lug tires 10, and the mud scraper blades are inserted between the lugs.
Scraping away the mud from there.

However, in the mud removing device disclosed in Japanese Utility Model Application Publication No. 57-177862, a large amount of power is required to drive the cleaning brush, leading to loss of driving force of the lug tires 10, and the scraping force of the cleaning brush is weak. Therefore, depending on the nature of the mud, it may not be possible to scrape it off properly despite contact with the cleaning brush. Furthermore, in the mud removing device disclosed in Japanese Utility Model Publication No. 44-15303, the synchronization mechanism for the mud removing vanes is complicated, making it difficult to use when tires with different lug pitches are replaced.

On the other hand, Japanese Patent Application Laid-open No. 56-167538 discloses that when a work vehicle moves from a work site such as a swampy area to a general road, pressurized air is sent to the nozzle by the operator's operation of an on-off valve. The present invention discloses a device for blowing pressurized air onto a tire to remove mud from the tire. Since this mud removal device uses pressurized air, it can omit a complicated synchronization mechanism and can properly remove mud from tires without causing tire drive loss.

[The problem that the idea attempts to solve]

The mud removal device disclosed in Japanese Patent Application Laid-Open No. 56-167538 is complicated because it requires an operator to check the state of mud adhesion on the tires and operate the on-off valves one by one.

The purpose of this invention is to automatically spray pressurized air onto the tire when mud adheres to the tire and it becomes necessary to remove the mud from the tire, thereby saving workers the troublesome work of removing mud from the tire. To provide a tire mud removal device that can be omitted.

[Means to solve the problem]

This invention will be explained with reference to drawings corresponding to embodiments. The tire mud removal device of this invention includes a vehicle speed sensor 48 that is attached to the vehicle 18 and detects the vehicle speed from the relative speed of the road surface with respect to the vehicle 18, and a vehicle speed sensor 48 that is attached to the vehicle 18 and detects the vehicle speed from the relative speed of the road surface with respect to the vehicle 18. A rotation sensor 50 that detects the rotation speed of the tire 10 and the vehicle speed sensor 48
and an electronic control device 52 that receives a detection signal from a rotation speed sensor and senses an increase in slip due to the low vehicle speed of the vehicle 18 despite the increase in the rotation speed of the tire 10, and releases the electromagnetic on-off valve 36; A nozzle 38 is provided for ejecting pressurized air toward the circumference of the tire 10 when the electromagnetic on-off valve 36 is opened.

[Effect]

As the amount of mud adhering to the tire 10 increases,
The tires 10 tend to slip on the road surface. In this way, it is possible to detect from the slip of the tire 10 that the amount of mud adhering to the tire 10 has increased and that the tire 10 needs to be cleaned. Vehicle speed sensor 4
When a slip of the tire 10 is detected based on the detection signal of the rotation speed sensor 8 and the rotation speed sensor 50, pressurized air is blown from the nozzle 38 toward the circumference of the tire 10 to blow off mud from the tire 10.

〔Example〕

This invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a diagram showing the overall configuration of the dew dropper. The lug tire 10 supports the frame 12 via a suspension system (not shown), and the fender 14 is attached to the lug tire 10 in an upper range of the lug tire 10.
is covered. The speed sprayer 18 as an agricultural vehicle is equipped with lug tires 10 for running in muddy areas, etc., and is adapted to run by rotation of the lug tires 10. The engine 20 is already mounted on the speed sprayer 18 to drive the lug tires 10, and the air compressor 22 is mounted on the speed sprayer 18 together with the engine 20. The pulley 24 is fixed to the drive shaft of the engine 20, the pulley 26 is rotatably supported by the input shaft of the air compressor 22, and the belt 28 transmits the rotation of the engine 20 from the pulley 24 to the pulley 26. The electromagnetic clutch 30 is
Controls power transmission between the pulley 26 and the input shaft of the air compressor 22. Air compressor 22
The rotation discharges pressurized air into the passage 32, and the passage 32 communicates with the inlet side of the air tank 34 and the electromagnetic on-off valve 36. The nozzle 38 is disposed corresponding to each driving lug tire 10 of the speed sprayer 18, and is installed in the frame 1 at the lower part of the fender 14.
2, and is directed toward the circumference of the upper end of the lug tire 10 and toward the axially outer side of the lug tire 10. The piping 40 has one end connected to the electromagnetic on-off valve 36.
The nozzle 38 is connected to the outlet of the nozzle 38 on the left and right sides. The pressure switch 46 is connected to the air tank 34
It is turned ON and OFF in relation to the air pressure of , and controls the supply of electricity from the power source 44 to the electromagnetic clutch 30 .

FIG. 2 is a sensor layout diagram in the mud removal device. 1 and 2, vehicle speed sensor 4
8 and the rotational speed sensor 50 detect the vehicle speed of the speed sprayer 18 and the rotational speed of the lug tire 10, respectively, and the electronic control device 52 detects the vehicle speed sensor 48 and the rotational speed of the lug tire 10, respectively.
and the detection signal of the rotation speed sensor 50 is inputted to control the energization of the electromagnetic on-off valve 36.

In FIG. 2, a vehicle speed sensor 48 is attached to the front lower part of the speed sprayer 18, and detects the vehicle speed of the speed sprayer 18 from the relative speed of the road surface to the speed sprayer 18. The rotation of the engine 20 (FIG. 1) of the speed sprayer 18 is changed in speed by a transmission 54 located at the lower center of the speed sprayer 18, and is further transmitted from the transmission 54 to the front and rear lug tires 10 via shafts 56 and 58. be done. The rotation speed sensor 50 is connected to the shaft 5
The rotation speed of the lug tire 10 is detected from the rotation speed of 6. When mud adheres to the circumference of the lug tire 10 and therefore the slip of the lug tire 10 increases,
Despite the increase in the rotational speed of the lug tires 10, the speed of the speed sprayer 18 is low.

The operation of the embodiment will be explained. When the air pressure in the air tank 34 is less than a predetermined value, the pressure switch 46 is turned on, the electromagnetic clutch 30 is energized, and the rotation of the pulley 26 is transmitted to the input shaft of the air compressor 22. Ru. As a result, the air compressor 22
It is driven by the power from 0 to discharge pressurized air into the passage 32, and the pressurized air is stored in the air tank 34.

When the air pressure in the air tank 34 is equal to or higher than a predetermined value, that is, when sufficient pressurized air is stored in the air tank 34, the pressure switch 46 is activated.
OFF, the electromagnetic clutch 30 is de-energized, the air compressor 22 is stopped,
Generation of pressurized air by the air compressor 22 is stopped. In this way, by operating the air compressor 22 only when necessary, the drive loss of the engine 20 can be suppressed to a minimum. Further, appropriate hysteresis is provided between ON and OFF of the pressure switch 46 to prevent hunting of the pressure switch 46.

The electronic control device 52 controls the speed sprayer 18
It is detected from the detection signal of the rotation speed sensor 50 that a slip of a predetermined size or more has occurred in the lug tire 10, and the electromagnetic on-off valve 36 is energized. As a result, pressurized air is ejected from the nozzle 38, pushing out the mud stuck between the lugs of the lug tire 10 in the axial direction of the lug tire 10, and blowing away the mud between the lugs of the lug tire 10. lug tire 1
When the mud is removed from the circumference of the lug tire 10 and the slip of the lug tire 10 is reduced, the electronic control unit 52 de-energizes the electromagnetic on-off valve 36 again and stops blowing out pressurized air from the nozzle 38.

FIG. 3 is a block diagram of a mud removing device equipped with an air cylinder 60 as a pressurized air source. As a result of installing the air cylinder 60, the air compressor 22, the power transmission mechanism from the engine 20 to the air compressor 22, and the air tank 34 can be omitted.

In addition, in the example, lug tire 1 of an agricultural vehicle
Although the mud removing device of this invention is described above, it can also be applied to removing mud from tires of other types of vehicles and tires other than lug tires.

[Effect of idea]

As described above, according to this invention, the fact that mud has adhered to the tire and it is necessary to remove the mud from the tire is detected from the tire slip by the slip detection means consisting of the vehicle speed sensor and the rotation speed sensor. When a predetermined slip is detected, pressurized air is ejected from the nozzle around the tire circumference, and mud adhering to the tire circumference is blown away and automatically removed from the tire. Therefore, the worker
This eliminates the need to check each tire for mud adhesion and operate on-off valves.

[Brief explanation of the drawing]

Figures 1 to 3 relate to an embodiment of this invention, in which Figure 1 is an overall configuration diagram of a mud remover, Figure 2 is a sensor arrangement in the mud remover, and Figure 3 is an air cylinder as a pressurized air source. It is a block diagram of the mud removal device equipped with this. 10...Lag tire (tire), 18...Speed sprayer (vehicle), 38...Nozzle, 48
... Vehicle speed sensor, 50 ... Rotation speed sensor.

Claims (1)

[Claims for Utility Model Registration] (1) A vehicle speed sensor 48 that is attached to the vehicle 18 and detects the vehicle speed from the relative speed of the road surface with respect to the vehicle 18, and from the rotation of the shaft 56 that transmits rotation to the tires 10 of the vehicle 18. The rotation sensor 50 detects the rotation speed of the tire 10, and the detection signals of the vehicle speed sensor 48 and the rotation speed sensor are inputted, and the slippage is detected because the vehicle speed of the vehicle 18 is low despite the increase in the rotation speed of the tire 10. An electronic control device 52 that senses the increase and releases the electromagnetic on-off valve 36, and a nozzle 38 that spouts pressurized air toward the circumference of the tire 10 when the electromagnetic on-off valve 36 is opened. Features a tire mud removal device. (2) The tire mud removal device according to claim 1, wherein the tire 10 is a lug tire 10. (3) The tire mud according to claim 2, wherein the nozzle 38 blows pressurized air toward the circumference of the lug tire 10 from approximately the axial direction of the lug tire 10. drop device. (4) The tire mud removal device according to any one of claims 1 to 3, wherein the vehicle 18 is an agricultural vehicle. (5) The vehicle 18 includes an engine 2 for driving the vehicle.
an air compressor 22 driven by
Claims 1 to 4 of the Utility Model Registered Claims are characterized in that an air tank 34 for storing the pressurized air generated by the air compressor 22 is installed as an air source of the pressurized air. The tire mud removal device according to any one of the above. (6) The tire according to any one of claims 1 to 4, wherein the air source of the pressurized air is an air cylinder 60 mounted on the vehicle 18. Mud removal device.