CN102408080A

CN102408080A - Overload limiting device and electric hoist using same

Info

Publication number: CN102408080A
Application number: CN2011103570681A
Authority: CN
Inventors: 金庆好; 张嫣然; 范涛; 王雷
Original assignee: Nucleon Xinxiang Crane Co Ltd
Current assignee: Nucleon Xinxiang Crane Co Ltd
Priority date: 2011-08-26
Filing date: 2011-11-11
Publication date: 2012-04-11
Also published as: CN202346680U

Abstract

The invention relates to an overload limiting device which comprises a hanging frame fixedly connected with an electric hoist, a weighing sensor arranged on the hanging frame and a wedge sleeve which is used for connecting a steel wire rope. The overload limiting device is characterized by further comprising a lever body with the middle part which is hinged with the hanging frame and the weighing sensor and the wedge sleeve are respectively hinged to two ends of the lever body; and one end of the weighing sensor, which is far away from the lever body, is hinged on the hanging frame. According to the overload limiting device provided by the invention, the problem in the prior art that the hanging frame, the weighing sensor and the wedge sleeve are sequentially connected in series to increase an upper limit dead zone of a hanger is solved.

Description

A kind of restraint device and use the electric block of this overload restraint device of overloading

Technical field

The present invention relates to weight-lifting equipment, relate in particular to a kind of electric block that is used for the overload restraint device of electric block and uses this overload restraint device.

Background technology

The overload restraint device is as a kind of important safety safety method, has been decided to be at present a kind of configuration that must be equipped with on the weight-lifting equipment such as electric block by country.Chinese patent 87210349 discloses a kind of " elevator machinery is used the monolithic devices load limiter "; This load limiter comprises pylon and the cover of wedge that is used to be connected steel rope; Be cascaded through LOAD CELLS between pylon and the cover of wedge, realize protection weight-lifting equipment thereby LOAD CELLS is transferred to corresponding electric-control system with the weight that steel rope carried.The shortcoming that existing load limiter exists is: pylon, LOAD CELLS and three parts of cover of wedge are connected in series along the lifting direction of steel rope successively, and serial connection length is longer, have increased the limes superiors blind area of corresponding suspension hook; Simultaneously the LOAD CELLS in the load limiter all is by fixing tonnage design-calculated; The electric block of each tonnage all must be equipped with the LOAD CELLS of different size; Be the load limiter that the electric block of each tonnage all can only be equipped with different size, commonality and interchangeability difficulty that load limiter is logical are bigger.

Summary of the invention

The object of the present invention is to provide a kind of overload restraint device, to solve in the prior art because pylon, LOAD CELLS and cover of wedge three are connected in series the problem of the suspension hook limes superiors blind area increase that causes successively.The present invention also aims to provide a kind of electric block that constitutes by this overload restraint device.

In order to address the above problem, the overload technical scheme of restraint device of the present invention is:

A kind of overload restraint device; Comprise and be used for the pylon that is connected with the electric block body and be arranged at the LOAD CELLS and the cover of wedge that is used to be connected steel rope on the pylon; Described overload restraint device comprises that also the middle part is articulated in the lever body on the said pylon; Described LOAD CELLS and described cover of wedge are articulated in the two ends of said lever body respectively, and said LOAD CELLS is articulated on the described pylon away from an end of said lever body.

The structure of described pylon is a U type flap, and described LOAD CELLS and lever body all are arranged between the both sides wooden partition of said U type flap.

Described LOAD CELLS is the plate ring sensor.

The technical scheme of electric block of the present invention is:

Electric block; The steel rope that comprises electric block body and lifting usefulness; One end of steel rope is connected with the overload restraint device; The lifting direction of steel rope is defined as above-below direction; Described overload restraint device comprises and is fixed on the pylon on the said electric block body and is arranged at the LOAD CELLS and the cover of wedge that is used to be connected said steel rope on the pylon that described overload restraint device comprises that also the middle part is articulated in the lever body on the said pylon, and the length bearing of trend of described lever body is along the left and right directions setting; Described LOAD CELLS and described cover of wedge are articulated in the two ends of said lever body respectively, and said LOAD CELLS is articulated on the described pylon away from an end of said lever body.

The structure of described pylon is a U type flap, and described LOAD CELLS and lever body all are located between the both sides wooden partition of U type flap.

Described sensor is the plate ring sensor.

Described LOAD CELLS and described cover of wedge are set up in parallel the sustained height position in said pylon along the vertical direction.

Beneficial effect of the present invention is: the present invention is through a hinged lever body on pylon; Then LOAD CELLS and cover of wedge are articulated in the two ends of lever body; The pulling force that cover of wedge bears passes to LOAD CELLS through the lever body changed course; Thereby reduced pylon, LOAD CELLS and cover of wedge length along the vertical direction, and then reduced the limes superiors blind area of suspension hook.

Description of drawings

Fig. 1 is the overload structural representation of restraint device embodiment of the present invention;

Fig. 2 is the block diagram of Fig. 1;

Fig. 3 is the structural representation of Fig. 1 when not having pylon;

Fig. 4 is the structural representation of electric block embodiment of the present invention.

The specific embodiment

A kind of overload restraint device embodiment is shown in Fig. 1 ~ 3: this overload restraint device comprises and is used for the pylon 1 that is connected with the electric block body and is arranged at the plate ring sensor 7 and the cover of wedge 6 that is used to be connected steel rope 5 on the pylon 1.The structure of pylon 1 is a U type flap; Have gap 8 on the U type flap; Be folded with lever body 2 between the both sides wooden partition of U type flap; The middle part of lever body 2 is articulated on the pylon 1 through the lever body jointed shaft 3 that is arranged on the wooden partition of U type flap both sides, and lever body 2 comprises two two lever plates that are set up in parallel along jointed shaft 3 axially spaced-aparts.The upper end of the upper end of plate ring sensor 7 and cover of wedge 6 is articulated in the two ends of two lever plate length directions respectively through cooresponding jointed shaft; Plate ring sensor 7 and cover of wedge 6 cooresponding jointed shafts all do not touch the both sides wooden partition of pylon 1, and the lower end of plate ring sensor 7 is articulated on the pylon 1 through the sensor jointed shaft 4 that is arranged on the pylon 1 both sides wooden partition.The upper end edge above-below direction of the upper end of plate ring sensor 7 and cover of wedge 6 is positioned at the sustained height position.In other embodiment of this overload restraint device, described plate ring sensor 7 can also be other resistance strain weighing transducer; Certainly the structure of pylon 1 can also be that integral body is hung block structure; Said lever body 2 can also be a bar shape structure; Certainly can also LOAD CELLS be arranged at the top of said lever body 2, this moment, LOAD CELLS adopted pressure and weighting transducers.

The below of steel rope 5 is provided with suspension hook during use; When suspension hook had been hung oneself weight, cover of wedge 6 received the downward pulling force of steel rope 5, and pulling force passes to plate ring sensor 7 through lever body 2; Because the lower end and the pylon 1 of plate ring sensor 7 are connected; The pulling force that the upper end of plate ring sensor 7 is passed over utilizes the material strain principle of induction, realizes the effect of overweight caution, outage.Because plate ring sensor 7 need not be connected with cover of wedge 6 when mounted along the vertical direction, thereby has reduced the length on the above-below direction between them, and then has reduced the limes superiors work blind area of suspension hook; Electric block using different tonnages makes, and only needs just can realize that through changing the arm of force length at lever body 2 two ends the plate ring sensor 7 with same specification satisfies electric block or other weight-lifting equipment of different tonnage demands.

The embodiment of electric block is shown in Fig. 1 ~ 4: comprise between 9, two cucurbits of two blocks of cucurbit wallboards wallboard 9 that spacing parallel arranging is provided with being connected with pivot shaft 10, the pylon 1 of overload restraint device is arranged on the pivot shaft 10.Electric block also comprises the steel rope 5 that lifts by crane usefulness; The lifting direction of steel rope 5 is defined as above-below direction; One end of steel rope 5 is connected with the overload restraint device, and the structure such as the above-mentioned overload restraint device embodiment of overload restraint device are said, no longer do detailed description here.The length bearing of trend of lever body is along the left and right directions setting in the overload restraint device, and plate ring sensor 7 is set up in parallel the sustained height position in pylon 1 along the vertical direction with cover of wedge 6.In other embodiment of this electric block, plate ring sensor 7 can also stagger with cover of wedge 6 along the vertical direction each other.

Claims

One kind the overload restraint device; Comprise and be used for the pylon that is connected with the electric block body and be arranged at the LOAD CELLS and the cover of wedge that is used to be connected steel rope on the pylon; It is characterized in that: described overload restraint device comprises that also the middle part is articulated in the lever body on the said pylon; Described LOAD CELLS and described cover of wedge are articulated in the two ends of said lever body respectively, and said LOAD CELLS is articulated on the described pylon away from an end of said lever body.
2. overload restraint device according to claim 1 is characterized in that: the structure of described pylon is a U type flap, and described LOAD CELLS and lever body all are arranged between the both sides wooden partition of said U type flap.
3. according to any described overload restraint device of claim 1 ~ 2: it is characterized in that: described LOAD CELLS is the plate ring sensor.
4. electric block; The steel rope that comprises electric block body and lifting usefulness; One end of steel rope is connected with the overload restraint device; The lifting direction of steel rope is defined as above-below direction; Described overload restraint device comprises and is fixed on the pylon on the said electric block body and is arranged at the LOAD CELLS and the cover of wedge that is used to be connected said steel rope on the pylon, it is characterized in that: described overload restraint device comprises that also the middle part is articulated in the lever body on the said pylon, and the length bearing of trend of described lever body is along the left and right directions setting; Described LOAD CELLS and described cover of wedge are articulated in the two ends of said lever body respectively, and said LOAD CELLS is articulated on the described pylon away from an end of said lever body.
5. electric block according to claim 5 is characterized in that: the structure of described pylon is a U type flap, and described LOAD CELLS and lever body all are located between the both sides wooden partition of U type flap.
6. according to any described electric block of claim 4 ~ 5, it is characterized in that: described sensor is the plate ring sensor.
7. electric block according to claim 5 is characterized in that: described LOAD CELLS and described cover of wedge are set up in parallel the sustained height position in said pylon along the vertical direction.