Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/26—Indicating devices
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/24—Safety devices, e.g. for preventing overload

Definitions

• This invention alerts drivers and managers by alerting drivers and managers when a working machine is loaded more than specified in a wheel loader belonging to the field of construction vehicles.
• Alarm device
• Fig. 2 is a schematic side view of a wheel loader equipped with a suitable working machine for transporting and loading timber, etc., and a working machine A is mounted on the front of the body B.
• the boom L is turned up and down by the boom cylinder C, and Li indicates the position where the boom L is turned to the maximum.
• a fork F is attached to the top and bottom of the hinge H, and a tilt cylinder D is attached to the top of the boom L by the tilt cylinder K.
• Undulating through is
• the ground force of the human down di pin H shows the height of the et al., h 0 at the time of full O over click the ground, h max non-emissions-di-pin force highest position H m, The maximum height at x is shown.
• ⁇ ,, a 2, ⁇ 3 indicate the tilt angle of Fork F with respect to the ground.
• GL is the ground.
• Figure 1 is have you to conventional e i one Norre B over Da, the weight of the load E were stacked off O over click -.. W i, + W 2, W 3 W 4 W 5
• the present invention has been made in view of the above circumstances, and an object thereof is to issue an alarm before a front wheel load reaches an allowable maximum load, and to provide a boom.
• a practical and reliable system that can raise an alarm even when the vehicle is raised to ensure that the driver can recognize that the vehicle is overloaded.
• An object of the present invention is to provide a wheelchair loading alarm device.
• a load between a normal load and a normal load is used by using a relationship between a height of a hinge pin at a boom tip and a hydraulic pressure of a boom cylinder.
• detect at least two proximity switches and a boom cylinder oil pressure to trigger an alarm so that an alarm is issued A wheel loader comprising at least two hydraulic switches and an electrical circuit having at least four relays for activating an alarm device; Overload alarm device is provided.
• the wheel having the characteristic that the hydraulic pressure for raising the boom changes even with the same load as the boom is raised.
• the overload warning device of the loader the warning is issued before the front wheel load reaches the maximum allowable load, and the warning continues to be issued even if the boom is raised. Since the driver is surely aware that the vehicle is overloaded, the vehicle will not be worn or damaged, and the vehicle will not fall over, making it possible to work safely and easily. Since it is an inexpensive and inexpensive electric circuit, it has a great effect of providing a practical and reliable alarm device.
• Fig. 1 is a graph showing the relationship between the height of the hinge pin, the hydraulic pressure of the boom cylinder, and the load of a conventional wheel loader.
• Fig. 2 is a wheel graph. Schematic side view of the
• FIG. 3 is an electric circuit diagram of one embodiment of the present invention.
• FIG. 4 is a graph showing the operation of the embodiment of the present invention.
• FIG. 5 is a logic table of the electric circuit shown in FIG. 3, and
• FIG. 6 is a table showing one embodiment of the operation.
• FIG. 1 is a diagrammatic representation of FIG. 1
• Fig. 3 is an electric circuit
• 11 and 12 are proximity switches consisting of an iron piece and a switch body.
• Numerals 21 and 22 denote hydraulic switches, which emit electric signals when the hydraulic pressure in the boom cylinder C shown in FIG. 2 reaches a set hydraulic pressure.
• Reference numerals 31, 32, 33, and 34 denote relays, and when current flows through the coil, the switch is closed by induced electromagnetic force.
• 4 1, 4 2, 4 3, and 4 4 are diodes for electrically protecting relays 3 1, 3 2, 3 3, and 3 4 respectively. .
• 51 and 52 are lamps and buzzers installed in the driver's cab to notify the driver of the wheel loader, and 53 is to alert the work supervisor outside the vehicle and because, Ho Lee Lumpur opening cab roof choice in red revolving light der one with 5 3 provided in Ichida the run-up, 5 3 2 Ru motors der.
• Fig. 4 2 is the setting height of the hinge pin when the proximity switches 11 and 21 shown in FIG. 3 emit electric signals, respectively, and beam Shi Li down da hydraulic pressure P 2! , ⁇ Beauty P 2 2 are their respective, in the third hydraulic scan I Tsu switch 2 1 which is shown in Figure, ⁇ beauty 2 2 is-out bets that Hassu electrical signals boom Shi Li down da set hydraulic is there .
• FIG. 4 2 is the setting height of the hinge pin when the proximity switches 11 and 21 shown in FIG. 3 emit electric signals, respectively, and beam Shi Li down da hydraulic pressure P 2! , ⁇ Beauty P 2 2 are their respective, in the third hydraulic scan I Tsu switch 2 1 which is shown in Figure, ⁇ beauty 2 2 is-out bets that Hassu electrical signals boom Shi Li down da set hydraulic is there .
• the alarm will continue to be issued when the height of the hinge pin exceeds h "and the vehicle enters this area.
• the IV area no warning is issued if the work equipment load starts in the IV area from the beginning. Power is high. The height is high. An alarm is issued at h: 2 or less. If the height of the hinge pin is high, it will be more than 2 and this IV area It is an area that keeps alerting when entering the area.
• FIG. 5 shows a logic table of the electric circuit shown in FIG. Next, a specific example of the above operation will be described.
• the load is a load slightly more than w3.
• the load is at the ⁇ ⁇ point in the area of ⁇ , and when the boom is raised, the load in the area of I is Ri moved to X 2 points, if when set to a higher boom to the al, Ryo regional X 3 points m,-out again four points sequentially move Tsu Teyu to X 5 points in the region of IV within the region of I
• the operation of the proximity switch, the hydraulic switch, the relay, and the alarm at each of the positions X1, X1 to X5 is as shown in the table shown in FIG.
• Sand I Chi loading position X in alarm out such Iga,, out alarm at the position of boiled rather than when X 2 by raising the boom, alarm and rather than boiled by raising the boom to the La Pull It is coming out successively.
• FIG. 4 smell is one der load have small Ri good w 3, loading in terms of the first X 6, and boiled rather than by raising the boom,
• the electric circuit was composed of two proximity switches and a hydraulic switch, and four relays, respectively, but the proximity switch and the hydraulic switch were used.
• the switch force was set to 2 or more and the number of relays to 4 or more, the operation of the alarm device will be more detailed and more durable. Is also possible.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Component Parts Of Construction Machinery (AREA)
• Forklifts And Lifting Vehicles (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11485706

Family Applications (1)

Country Status (5)

Citations (2)

Family Cites Families (2)

• 1989
  • 1989-01-10 JP JP1989000870U patent/JPH0743215Y2/ja not_active Expired - Lifetime
• 1990
  • 1990-01-10 KR KR1019900701998A patent/KR910700385A/ko not_active Withdrawn
  • 1990-01-10 AU AU48262/90A patent/AU629892B2/en not_active Expired - Fee Related
  • 1990-01-10 WO PCT/JP1990/000021 patent/WO1990008235A1/ja active Application Filing
  • 1990-01-10 DE DE904090057T patent/DE4090057T1/de not_active Withdrawn

Patent Citations (2)

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