CN201501757U - Hoisting capacity limitation detector - Google Patents
Hoisting capacity limitation detector Download PDFInfo
- Publication number
- CN201501757U CN201501757U CN2009200372920U CN200920037292U CN201501757U CN 201501757 U CN201501757 U CN 201501757U CN 2009200372920 U CN2009200372920 U CN 2009200372920U CN 200920037292 U CN200920037292 U CN 200920037292U CN 201501757 U CN201501757 U CN 201501757U
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- cover plate
- pressure cap
- pressure
- groove
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Abstract
The utility model discloses a hoisting capacity limitation detector with a simple structure and a low price, which comprises a main body. A cover plate is fixedly arranged on the main body, and a through hole is disposed on the cover plate; a cavity is arranged inside the main body, a pressing cap capable of moving up and down inside the cavity is arranged inside the same, the top portion of the pressing cap extends out through the through hole on the cover plate, an arc groove is disposed on the top plane of the pressing cap, and a groove communicated with the outer portion of the pressing cap is arranged inside the same; and a spring embedded inside the groove is positioned inside the cavity. A bottom plate and a microswitch fixed on the bottom plate are arranged inside the cavity, and a contact sheet of the microswitch is positioned below the pressing cap; an adjusting screw movably connected onto the bottom plate penetrates through the bottom portion of the main body and is in threaded connection with the same; a pressing head respectively arranged at two ends of the cover plate is respectively fixed at two ends of the cover plate via screws and provided with a rope pressing groove; and a communication cavity and an external conduction wire passage are disposed on the main body. The detector is suitable for working places of hoists.
Description
Technical field
The utility model relates to the elevating capacity limiting and detecting device that a kind of electric hoist crane is used.
Background technology
The application of electric hoist crane at present is very extensive, but because overload, the safety misadventure of generation is also a lot.When hoisting crane is not installed load lifting limiter, a lot of operating personals are in order to accelerate work speed, no matter the lifting thing has multiple, work on, the result will produce the avoidable contingency of a lot of bases, as: crossbeam hang curved, wire cable rupture, electric block comes off from crossbeam, such accident will cause device damage, even personal injury.
After the national regulation electric hoist crane must be installed load lifting limiter now, present load lifting limiter is made up of detecting device and display instrument, the inspection electric bridge that detecting device is mainly formed by body, by voltage sensitive sensor, feed circuit, inspection comparator circuit etc. are formed, whether weight and prompting that this load lifting limiter can demonstrate current lifted weight overload, if overload, power supply meeting automatic cutout, though the effect of this load lifting limiter is fairly obvious, but cost an arm and a leg, and Installation and Debugging bother very much, need the professional to operate.
The utility model content
Technical problem to be solved in the utility model is: a kind of elevating capacity limiting and detecting device simple in structure, low-cost will be provided.
For addressing the above problem, the technical solution adopted in the utility model is: a kind of elevating capacity limiting and detecting device, comprise body, on body, be set with cover plate, on the cover board be provided with through hole, in body, be provided with cavity, in described body, be provided with pressure cap, described pressure cap is positioned at cavity and can moves up and down at cavity, stretch out the through hole of the top of pressure cap from cover plate, the end face of pressure cap is provided with the arc groove, in pressure cap, be provided with groove with its exterior, in groove, be embedded with spring, spring is positioned at cavity, in body, also be provided with micro-switch, described micro-switch is fixed on the base plate, micro-switch and base plate all are positioned at cavity, the contact of described micro-switch is positioned at the below of pressure cap, on base plate, be connected with set screw, described set screw passes and is threaded with body from organism bottom, is respectively arranged with pressure head at the two ends of cover plate, and described pressure head is by the two ends of screw retention at cover plate, be provided with the pressure grooving on the described pressure head, body is provided with and is communicated with cavity and exterior lead channels.
Bottom at described pressure cap is provided with flanging, and the diameter of described flanging is greater than the diameter of through hole on the cover plate;
The inwall of described cavity is provided with guiding rib, and described pressure cap is provided with the guide groove that matches with guiding rib;
Described set screw is provided with jam nut, and described jam nut is positioned at the outside of body;
The sagitta of the pressure grooving on described two pressure heads, one of them is greater than the diameter of steel rope, and another is less than the diameter of steel rope;
Pressure grooving on described two pressure heads is positioned on the extended line of arc groove on the pressure cap.
The beneficial effects of the utility model are: adopt pressure cap to trigger micro-switch and control switching on and off of power supply timely, simple in structure, cost is low, and price is also just cheap.
Description of drawings
Fig. 1 is the structural representation of the utility model elevating capacity limiting and detecting device;
Fig. 2 is Fig. 1 left view;
Fig. 3 is the section drawing of pressure cap left side apparent direction among Fig. 1;
Installation sketch when Fig. 4 is the utility model real work.
Among the figure: 1, body, 2, cover plate, 3, through hole, 4, cavity, 41, guiding rib, 5, pressure cap, 51, flanging, 52, the arc groove, 53, groove, 54, guide groove, 6, spring, 7, micro-switch, 71, contact, 8, base plate, 9, set screw, 10, seaming chuck, 101, on press grooving, 11, push-down head, 111, press down grooving, 12, screw, 13, jam nut, 14, lead channels, 15 steel ropes, 16, power supply, 17, lead, 18, contactless for hoisting coil.
The specific embodiment
Below in conjunction with accompanying drawing, the structure and the principle of work of the utility model elevating capacity limiting and detecting device is described in further detail.
As Fig. 1, Fig. 2, shown in Figure 4, a kind of elevating capacity limiting and detecting device, comprise body 1, on body 1, be set with cover plate 2, cover plate 2 is provided with through hole 3, in body 1, be provided with cavity 4, in described body 1, be provided with pressure cap 5, be provided with flanging 51 in the bottom of described pressure cap 5, the diameter of described flanging 51 is greater than the diameter of through hole 3 on the cover plate 2, and described pressure cap 5 is positioned at cavity 4 and can moves up and down at cavity 4, stretches out the through hole 3 of the top of pressure cap 5 from cover plate 2, the end face of pressure cap 5 is provided with arc groove 52---and as shown in Figure 3,52 pairs of steel ropes of arc groove play the effect of location.Be provided with the groove 53 with its exterior in pressure cap 5, be embedded with spring 6 in groove 53, spring 6 is positioned at cavity 4, and spring 6 always is at the highest notch pressure cap 5, and the flanging 51 on the pressure cap 5 is blocked by cover plate 2 simultaneously, and pressure cap 5 can not ejected by spring 6; Certainly, if in the bottom of pressure cap 5 flanging 51 is not set, pressure cap 5 can be ejected by spring 6 and break away from body 1, in transportation, drop easily, but when reality is used, owing to have steel rope 15 to push down pressure cap 5, so pressure cap 5 can not drop.In body 1, also be provided with micro-switch 7, described micro-switch 7 is fixed on the base plate 8, micro-switch 7 and base plate 8 all are positioned at cavity 4, the contact 71 of described micro-switch 7 is positioned at the below of pressure cap 5, on base plate 8, be connected with set screw 9, described set screw 9 passes from body 1 bottom and is threaded with body 1, two ends at cover plate 2 are respectively arranged with pressure head, be seaming chuck 10 and push-down head 11, described seaming chuck 10 and push-down head 11 are fixed on the two ends of cover plate 2 respectively by screw 12, be respectively arranged with on described seaming chuck 10 and the push-down head 11 to press grooving 101 and press down grooving 111.Wherein go up the diameter of the sagitta of pressure grooving 101 less than used steel rope 15, press down the diameter of the sagitta of grooving 111 greater than used steel rope 15, after steel rope 15 passes and presses grooving 101 and press down grooving 111 like this, seaming chuck 10 and cover plate 2 can be tightly clamping steel rope 15, prevent body 1 landing from the steel rope 15, and push-down head 11 and cover plate 2 need not clamp steel rope 15, can not influence the variation of steel rope because of the deformation quantity that is subjected to tension force and produces like this; In order to prevent that body 1 can landing on steel rope 15; also can adopt other method: two fixture blocks for example are set on steel rope; two fixture blocks lay respectively at the both sides of seaming chuck 10; perhaps the end with rope hitches body 1; the other end hitches steel rope 15; these two kinds of methods can both play the effect that prevents body 1 landing on steel rope 15, but these methods still all belong to protection domain of the present utility model.The inwall of described cavity 4 is provided with guiding rib 41, and described pressure cap 5 is provided with the guide groove 54 that matches with guiding rib 41.Guiding rib 41 and guide groove 54 match, and prevent that pressure cap 5 from rotating in cavity 4, simultaneously pressure cap 5 can be moved up and down, and guarantee to go up and press grooving 101 and press down grooving 111 on the extended line at the two ends of arc groove 52, conveniently steel rope 15 are positioned.Described set screw 9 is provided with jam nut 13, and described jam nut 13 is positioned at the outside of body 1.Jam nut 13 can be more firm adjustment screw 9, it is loosening to prevent that effectively set screw 9 from producing in the back that works long hours, and influence the location of micro-switch 7, thereby influences the value of the hoisting capacity that is limited.Also be provided with the lead channels 14 with cavity 4 and external communications on body 1, the lead 17 of micro-switch 7 is drawn out to body 1 outside by lead channels 14.
Principle of work of the present utility model is: at first lead 17 is serially connected in the loop of the contactless for hoisting coil 18 of controlling crane and hoist type motor, micro-switch 7 and contactless for hoisting coil 18 and power supply 16 thereof are in series, in case micro-switch 7 disconnects like this, power supply 16 will disconnect at once, contactless for hoisting cuts off the power supply, hoisting crane stops crane lifting service at once, effectively prevents from because of overload safety misadventure to take place.Set maximum weight then, concrete grammar is: unclamp jam nut 13 earlier, rotation set screw 9, set screw 9 drives micro-switch 7 and base plate 8 moves up and down together, regulate the distance of the bottom of pressure cap 5 with the contact 71 of micro-switch 7, guarantee that the tension force of steel rope 15 just reaches the tension force size that the hoisting capacity limits value is produced, and tightens jam nut 13 subsequently when pressure cap 5 is pressed onto contact 71 and make micro-switch 7 open circuited.Steel rope 15 is passed pressure grooving 101 and presses down grooving 111, and steel rope 15 is put into arc groove 52, with screw 12 seaming chuck 10 and push-down head 11 are separately fixed at the two ends of cover plate 2 then respectively.When the crane loading weight, steel rope 15 will produce certain force of strain, pressure cap 5 under the effect of steel rope 15 tension force to pressing down, when if hoisting heavy does not reach the value of hoisting capacity restriction, pressure cap 5 just can not touch contact 71, micro-switch 7 can not disconnect, crane lifting service normally carries out, when hoisting heavy reaches or surpass the hoisting capacity limits value, pressure cap 5 will be depressed into the contact 71 that touches micro-switch 7 and trigger micro-switch 7 and disconnect, the contact wire loop that rises like this will disconnect, and hoisting crane will stop crane lifting service, has avoided because of overload safety misadventure taking place.
Advantage of the present utility model be: adopt pressure cap to trigger microswitch and control in time switching on and off of power supply, simple in structure, cost is low, and price is also just cheap.
Claims (6)
1. elevating capacity limiting and detecting device, comprise body, it is characterized in that: on body, be set with cover plate, on the cover board be provided with through hole, in body, be provided with cavity, in described body, be provided with pressure cap, described pressure cap is positioned at cavity and can moves up and down at cavity, stretch out the through hole of the top of pressure cap from cover plate, the end face of pressure cap is provided with the arc groove, is provided with the groove with its exterior in pressure cap, in groove, be embedded with spring, spring is positioned at cavity, also is provided with micro-switch in body, and described micro-switch is fixed on the base plate, micro-switch and base plate all are positioned at cavity, the contact of described micro-switch is positioned at the below of pressure cap, is connected with set screw on base plate, and described set screw passes and is threaded with body from organism bottom, two ends at cover plate are respectively arranged with pressure head, described pressure head is provided with the pressure grooving by the two ends of screw retention at cover plate on the described pressure head, body is provided with and is communicated with cavity and exterior lead channels.
2. according to the described elevating capacity limiting and detecting device of claim 1, it is characterized in that: the bottom at described pressure cap is provided with flanging, and the diameter of described flanging is greater than the diameter of through hole on the cover plate.
3. according to the described elevating capacity limiting and detecting device of claim 1, it is characterized in that: the inwall of described cavity is provided with guiding rib, and described pressure cap is provided with the guide groove that matches with guiding rib.
4. according to the described elevating capacity limiting and detecting device of claim 1, it is characterized in that: described set screw is provided with jam nut, and described jam nut is positioned at the outside of body.
5. according to claim 1 or 2 or 3 or 4 described elevating capacity limiting and detecting devices, it is characterized in that: the sagitta of the pressure grooving on described two pressure heads, one of them is greater than the diameter of steel rope, and another is less than the diameter of steel rope.
6. according to the described elevating capacity limiting and detecting device of claim 1, it is characterized in that: the pressure grooving on described two pressure heads is positioned on the extended line of arc groove on the pressure cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200372920U CN201501757U (en) | 2009-02-13 | 2009-02-13 | Hoisting capacity limitation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200372920U CN201501757U (en) | 2009-02-13 | 2009-02-13 | Hoisting capacity limitation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201501757U true CN201501757U (en) | 2010-06-09 |
Family
ID=42452694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200372920U Expired - Fee Related CN201501757U (en) | 2009-02-13 | 2009-02-13 | Hoisting capacity limitation detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201501757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174068A (en) * | 2015-10-21 | 2015-12-23 | 山东钢铁股份有限公司 | Device for ensuring soft landing and overload alarm of hooks |
-
2009
- 2009-02-13 CN CN2009200372920U patent/CN201501757U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174068A (en) * | 2015-10-21 | 2015-12-23 | 山东钢铁股份有限公司 | Device for ensuring soft landing and overload alarm of hooks |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20110213 |