CN200981807Y

CN200981807Y - Circulating load-limiting workbench

Info

Publication number: CN200981807Y
Application number: CN 200620126714
Authority: CN
Inventors: 田志坚; 周根兵; 阚四华
Original assignee: Xuzhou Heavy Machinery Co Ltd
Current assignee: Xuzhou Heavy Machinery Co Ltd
Priority date: 2006-11-01
Filing date: 2006-11-01
Publication date: 2007-11-28
Anticipated expiration: 2016-11-01

Abstract

The utility model discloses a circulating loading-limit operating platform used by the lifting fire truck or the high-altitude operation truck, comprising a tray and a framework, wherein the framework is in a concave shape; a rotating leveling hinge joint between a rotating pole of the tray and a bracket of the tray is arranged on the inner concave position of the framework; a buffer is connected between the rotating pole, and the bracket and the framework; the front end of the bracket is connected with an stroke switch; the back end of the bracket is connected with the back end of a staff gauge; the front end of the staff gauge is connected with a top pole; and the top pole is arranged under the stroke switch. The utility model can fully utilize the space, effectively advance the bearing force of an arm frame, and also do the automatic loading-limit alarm. Moreover, the utility model has reliable structure, large bearing area, small overturning moment, light weight and safe utilizing.

Description

Circulating type limit for tonnage workplatform

Technical field

The utility model relates to the workplatform of a kind of elevating fire truck or aerial platform use.

Background technology

Known workplatform is the steel rectangular frame structure, and integral body is hinged on the jib head.In order to satisfy the operation comformability, workplatform is provided with the rotation levelling gear usually, the swing deflection machanism satisfies its motion requirement.For the safety and the facility of aloft work, the workplatform front end is provided with overturning pedal life saving service, spray equipment and fire water monitor usually and waits and satisfy its functional requirement.But known workplatform, because its rotation leveling hinge is positioned at the rectangular frame rear side, shape is as " protruding " word, space utilization is insufficient, can not effectively reduce the bearing capacity of jib; Since the automatic load limitation warning device is not set, when workplatform overloads, can not auto alarm.

Summary of the invention

But the purpose of this utility model be to provide a kind of space utilization fully, can effectively improve the bearing capacity of jib and the circulating type limit for tonnage workplatform that automatic load limitation is reported to the police.

The purpose of this utility model is achieved in that this workplatform comprises carriage and framework, framework is a concave character type, rotation leveling hinge between the rotary column of carriage and the support of carriage is positioned at the recess of framework, be connected with cushion rubber between rotary column and support and the framework, the support front end is connected with travel switch, back-end support links to each other with the scale rear end, and the scale front end is connected with fore-set, and fore-set is positioned at below the travel switch.

Framework of the present utility model is a concave character type, and the rotation leveling hinge between the rotary column of carriage and the support of carriage is positioned at the recess of framework, space utilization fully, can effectively improve the bearing capacity of jib.Support is connected with travel switch and scale, but automatic load limitation is reported to the police.Principle is clear, reliable in structure.Loaded area is big, and tilting moment is little, and is in light weight, safe in utilization.

Description of drawings

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

Fig. 2 is the schematic top plan view of Fig. 1.

Fig. 3 is the automatic load limitation electrical principle scheme drawing of Fig. 1.

1. carriages among the figure, 2. framework, 3. cushion rubber, 4. scale, 5. fore-set, 6. travel switch, 7. jib head, 8. rotary column, 9. support.

The specific embodiment

In Fig. 1 and Fig. 2, framework 2 is a concave character type, and the rotation leveling hinge between the rotary column 8 of carriage 1 and the support 9 of carriage 1 is positioned at the recess of framework 2.Be connected with cushion rubber 3 between rotary column 8 and support 9 and the framework 2.Support 9 front ends are connected with travel switch 6, and support 9 rear ends link to each other with scale 4 rear ends, and scale 4 front ends are connected with fore-set 5, and fore-set 5 is positioned at below the travel switch 6.

Carriage 1 is a steel mechanism, and framework 2 is an aluminium alloy structure, between the two by cushion rubber 3 (material rubber) bolt together.Carriage 1 is made up of rotary column 8 and support 9, and the former is for the rotary oscillation of realizing workplatform and rotation levelling function, and the latter is for the structural safety sexual needs after realizing support 9 deformation detection and guaranteeing workplatform employing aluminum alloy frame.Support 9 joins no relative motion together by cushion rubber 3 and bolt and framework 2.Support 9 can sway with framework 28 of relative rotary columns.

By finding out scale 4 installation sites among Fig. 1 and Fig. 2 at middle part, framework 2 bottom surfaces, the rear end is connected with support 9 rear end roots by tie bolt, and front end is equipped with adjustable fore-set 5.Adjustable fore-set 5 be positioned at travel switch 6 contacts under, its lower end is a thread rod, is installed in the tapped bore of scale 4 ends, uses the nut tightening, can regulate above the fore-set 5 distances with respect to travel switch 6 contacts by screwing nut and fore-set 5.Travel switch 6 left surfaces are fixed by the front end of attaching screw and support 9.

This embodiment middle frame 2 adopts " recessed " font circulating type structure, both guaranteed the rotating space, framework 2 relative rotary column 8 left and right sides of workplatform, effectively utilized the space of rotary column 8 both sides again, reduced the distance of workplatform carrying centre distance jib head 7 hinges, thereby realized under the condition of identical loaded area and bearing capacity, its tilting moment minimum has improved the safety and the transaction capabilities of complete machine.

Because it is lower that the weld strength of aluminum current alloy profile is compared steel profile, therefore in order effectively to alleviate dead weight of platform and to guarantee the safety of its structure, workplatform adopts the structure of steel carriage 1+ aluminum alloy frame 2.In this structure with steel carriage 1 as main load member, aluminum alloy frame 2 is then only as the side direction supporting body.

In Fig. 3, travel switch 6 is a normal open.When the workplatform carrying exceeded safe permissible value, support 9 can produce corresponding big distortion downwards, and 6 on travel switch is displaced downwardly to the top with the distortion of support 9 front ends and goes up fore-set 5 upper surfaces, disconnects thereby make travel switch 6 contacts bounce back to switch.Relay K 1 control two switches are all power-failure close, only show the switch-K1 of control horn in H 1 energising among the figure, and another switch omits among the figure for the energising of control jib action output.Thereby volitional check and alarm have been realized like this to workplatform carrying operation.

Claims

1. circulating type limit for tonnage workplatform, this workplatform comprises carriage and framework, it is characterized in that framework is a concave character type, rotation leveling hinge between the rotary column of carriage and the support of carriage is positioned at the recess of framework, be connected with cushion rubber between rotary column and support and the framework, the support front end is connected with travel switch, and back-end support links to each other with the scale rear end, the scale front end is connected with fore-set, and fore-set is positioned at below the travel switch.