CN201362576Y

CN201362576Y - Two-point form electric control system for aerial work platform truck with foldable arm

Info

Publication number: CN201362576Y
Application number: CNU2009200890493U
Authority: CN
Inventors: 王子铭; 李春新; 杜磊
Original assignee: Xuzhou XCMG Truck Mounted Crane Co Ltd
Current assignee: Xuzhou XCMG Truck Mounted Crane Co Ltd
Priority date: 2009-03-06
Filing date: 2009-03-06
Publication date: 2009-12-16
Anticipated expiration: 2019-03-06

Abstract

The utility model discloses a two-point form electric control system for an aerial work platform truck with a foldable arm. The system comprises a two-point form controller and a control circuit; the two-point controller is connected on an upper arm and is provided with a heavy hammer, the movable end of which is movably connected with the upper arm; two contact faces are respectively arranged at two sides of the heavy hammer; a first proximity switch is arranged above the left part of the heavy hammer and is fixedly connected with the upper arm, and a second proximity switch is arranged above the right part of the heavy hammer and is fixedly connected with the upper arm; and the first proximity switch and the second proximity switch are electrically connected with the control circuit of the aerial work platform truck. Based on the principle that the center of gravity of the heavy hammer does not change, the control system makes use of the maximum angle of 75 degrees between the upper arm and the horizontal line and the initial limit position of the principal arm at 30 degrees to control the work platform truck and at the same limits the movement of the valve to ensure control safety and reliability. The position detection and the point arrangement are convenient, and the cost is low. The control system is suitable for safety control of a high-end aerial work platform truck with a two or three-segment foldable arm.

Description

Folding arm-type aerial platform two-point form electric control system

Technical field

The utility model relates to the safety control of a kind of high-end two joints, the folding arm-type aerial platform of three joint arms.

Background technology

At present, the safety control that aerial platform adopted is still decision circuit mainly, and by realizing near the relative position between the detection architecture of switch or travel switch, for the detection position with layout all very inconveniently, the reliability of detection also is a problem.And to realize that the restriction of exact location and location employing PLC control 2 angular transducers of also necessary coupling, cost is very expensive again.14 meters, 16 meters folding arm-type aerial platform costs are higher, and each manufacturer is not wishing to increase under the condition of cost like this, generally adopt the control that does not increase the folding arm position, sacrificed the method for controller performance, and the reliable in action of product has been subjected to influence.

Summary of the invention

The purpose of this utility model is that a kind of folding arm-type aerial platform two-point form electric control system will be provided, and this system makes that layouting of detection and position is all very convenient, and cost is also low.

The purpose of this utility model is achieved in that this system comprises a two-point form controller and control circuit, the two-point form controller is connected on the upper arm, the two-point form controller has a weight, the movable end of weight links to each other with upper arm, the both sides of weight are respectively equipped with a contact surface, first is connected to a fixed near the upper left side and the upper arm of switch at weight, second is connected to a fixed near the upper right side and the upper arm of switch at weight, and first is electrically connected with the control circuit of Operation Van near switch near switch and second.

The utility model is set positive 75 degree respectively at upper arm dress two-point form controller, two positions of negative 30 degree near switch.According to weight center of gravity direction invariance principle, utilize upper arm maximum horizontal direction to become the end position of 75 degree and initial 30 degree of principal arm to control the action of inhibitor valve simultaneously.When upper arm reaches when spending with ground 75, weight collision 75 degree near switch, near switch output control signal, the liter action of the relay control upper arm by decision circuit and underarm action falls.At the initial 30 degree angles of principal arm, mainly be to prevent lift arm or upper arm collision vehicle rear-side.Surpass level 30 degree as long as upper arm rises, principal arm rises and will can not make the collision of upper arm and lift arm and vehicle rear-side.When just upper arm becomes 30 to spend with horizontal direction with the reversing sense of hinge when 30 spend near switch connection,, control the liter action of falling action and underarm of upper arm by the relay of decision circuit near switch output signal.The method of limit of utilization position has been controlled the end position of two operations, guarantees the safe and reliable of control.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is that two-point form among Fig. 1 is near switch initial condition scheme drawing

Fig. 3 is that two-point form among Fig. 1 is near a kind of working state schematic representation of switch.

Fig. 4 is that two-point form among Fig. 1 is near the another kind of working state schematic representation of switch

1. two-point form controllers among the figure, 2. the upper arm amplitude oil cylinder, 3. upper arm, 4. underarm, 5. the underarm amplitude oil cylinder, 6. weight, A. first near switch, B. second near switch, C. center of gravity direction, D. weight hand of rotation.

The specific embodiment

In Fig. 1, two-point form controller 1 is installed on the upper arm 3, and upper arm amplitude oil cylinder 2 is connected between upper arm 3 and the underarm 4, is used for driving the motion of upper arm 3 luffings.Underarm amplitude oil cylinder 5 drives the motion of underarm luffing.

In Fig. 2, Fig. 3 and Fig. 4, two-point form controller 1 has a weight 6, the movable end of weight 6 and upper arm 3 are movably connected, the both sides of weight 6 are respectively equipped with a contact surface, first is connected to a fixed at the upper left side and the upper arm 3 of weight 6 near switch A, second is connected to a fixed at the upper right side and the upper arm 3 of weight 6 near switch B, and first is electrically connected with the control circuit of Operation Van near switch B near switch A and second.

During initial condition, first near switch A and second near switch B output signal not.

When upper arm 3 became positive 75 to spend with level, the contact surface in weight 6 left sides was near first near switch A, and first near switch A output signal, controls corresponding arm body action.When upper arm 3 when negative 30 spend, the contact surface on weight 6 right sides is near second near switch B, second near switch B output signal, controls corresponding arm body action.

Claims

1. one kind folds arm-type aerial platform two-point form electric control system, this system comprises a two-point form controller and control circuit, it is characterized in that the two-point form controller is connected on the upper arm, the two-point form controller has a weight, the movable end and the upper arm of weight are movably connected, the both sides of weight are respectively equipped with a contact surface, first is connected to a fixed near the upper left side and the upper arm of switch at weight, second is connected to a fixed near the upper right side and the upper arm of switch at weight, and first is electrically connected with the control circuit of Operation Van near switch near switch and second.