CN204474227U - A kind of counterweight limit device - Google Patents
A kind of counterweight limit device Download PDFInfo
- Publication number
- CN204474227U CN204474227U CN201520071360.0U CN201520071360U CN204474227U CN 204474227 U CN204474227 U CN 204474227U CN 201520071360 U CN201520071360 U CN 201520071360U CN 204474227 U CN204474227 U CN 204474227U
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- weight
- connection block
- bob
- bolt
- limit switch
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Abstract
The utility model discloses a kind of counterweight limit device, comprise Connection Block, bob-weight, limit switch, weight, described bob-weight is provided with connecting bore, described connecting bore is connected with described Connection Block by bolt pin; Described bob-weight can swing around bolt pin; Described bob-weight one edge tail is connected with weight by stay cord; Described weight is provided with axial cord borehole jack on the steel rope of suspension hook; Described Connection Block installs a caging bolt; Described Connection Block is connected with described limit switch by screw; Described Connection Block is connected with electric block or crane lifting trolley frame by bolt; The utility model is spacing safe and reliable, is active in one's movements, and volume is little, lightweight, cost is low.
Description
Technical field
The present invention relates to crane field, refer more particularly to a kind of counterweight limit device.
Background technology
In crane field, in order to avoid the pulleying of lift system is rushed to summit, cause and break steel rope, hang the accidents such as thing falls, require that hoisting crane is all provided with hoisting depth limiting device, this ensures the safety of lift system to a great extent; At the production field that a few thing rank is high, as metallurgical smelting industry, crane lifting mechanism is all provided with multiple hoisting depth limiting device with preventing colliding with top, wherein just uses weight hammer type and promotes inhibiting device; Its principle of work is: in lifting driving system, a run action is being gone out to make a return journey triggering electric switch by pulleying front transfer, cutting off the control power supply in circuit contactless for hoisting, thus lifting driving system is quit work, avoid the accident of rushing to summit; The heavy hammer limiting switch that traditional hoisting crane uses is special LX series, an affixed eccentric weight hammerhead jib on the little axle of this switch housing, on eccentric weight hammerhead jib, peripheral mechanism is connected again during use, switch price is high, volume is large, installation takes up room greatly, some light hoisting gear is not easy to install.
Summary of the invention
The object of the invention is overcome above-mentioned weak point of the prior art and provide a kind of counterweight limit device, want technical solution problem to be: hoisting depth spacing safe and reliable, be active in one's movements, volume is little, lightweight, cost is low, and can for the such light hoisting gear of electric block.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of counterweight limit device, comprise Connection Block 1, bob-weight 2, limit switch 3, weight 5, described bob-weight 2 is provided with connecting bore, described connecting bore is connected with described Connection Block 1 by bolt pin 21; Described bob-weight 2 can swing around bolt pin 21; Described bob-weight 2 one edge tail is connected with weight 5 by stay cord 4; Described weight 5 is provided with axial cord borehole jack on the steel rope of suspension hook; Described Connection Block 1 installs a caging bolt 22; Described Connection Block 1 is connected with described limit switch 3 by screw 35; Described Connection Block 1 is connected with electric block or crane lifting trolley frame by bolt 11.
Wherein, described limit switch 3 is the micro-switchs adopting TZ series; Described limit switch 3 has a seesaw 31, described seesaw 31 one end is connected to a pin on limit switch 3 and can swings around this pin, and the other end connects a roller 311; Described seesaw 31 is connected to push rod 33, Compress Spring 32, described Compress Spring 32 is when free state, push seesaw 31 and be in maximum open position, now push rod 33 is also in and stretches out maximum position, and push rod 33 inside is connected to circuit contact and is in on-state; Electric wire 34 now on limit switch 3 is connected to the control power supply in crane hook contactless for hoisting; As long as power-on, the electric wire 34 now in limit switch 3 is in "on" position; Crane hook can normally run up and down.
Wherein, described Connection Block 1 is arranged to inverted U-shaped; Described Connection Block is processed with bolt pin-and-hole 15 for hold-down bolt pin 21, caging bolt hole 12 for mounting limit bolt 22, screw hole 13 for connecting the screw 35 of limit switch, bolt hole 14 on trolley frame Connection Block bolt 11 being connected to crane lifting mechanism or electric block.
Principle of work of the present invention: when the suspension hook of hoisting crane be in below the normal height allowed work time, weight 5 in the present invention is in free suspension state, hauling stay cord 4 makes bob-weight 2 be in cw rotation maximum position, do not touch limit switch 3, now limit switch 3 internal circuit is in on-state; When suspension hook generation pulleying is about to rush to summit, weight 5 encountered by suspension hook, and weight 5 will be ask to rise, stay cord 4 is relaxed, and now bob-weight 2 counter-clockwise swing under eccentric Action of Gravity Field, press against on the roller 311 of limit switch, seesaw 31 is swung, until the limited bolt 22 of bob-weight 2 limits; When seesaw 31 is to lower swing, push rod 33, toward pressing down, makes limit switch 3 inner contact open, electric wire 34 power-off, has namely cut off the control power supply in contactless for hoisting, makes lift system no longer to ascent direction motion, plays height limit protective effect; When unlatching lift system decline switch, suspension hook descending motion, weight 5 falls, and bob-weight 2 is put, and the seesaw 31 of limit switch 3 returns to the state of upwarping again under Compress Spring 32 acts on, and in limit switch 3, circuit is in on-state again.
Beneficial effect of the present invention is: structure of the present invention is simple, light and handy, novel, and limit function is safe and reliable, be active in one's movements, and volume is little, lightweight, cost is low; Whole device is no more than 500 grams except weight and stay cord weight, limit switch adopts the micro-switch of TZ series, very light, weight just 30 ~ 40 grams, and hoisting crane is when normally working, weight is in tension, and limit switch is not subject to external force pressure, the sensitive long-lived performance that limit switch performance itself has; Limit switch is only just subject to the pressure of bob-weight when pulleying occurs hoisting crane once in a while, and bob-weight eccentric force does not also weigh, unlike traditional counterweight limit device, the weight of weight and stay cord is directly hung on limit switch cantilever and makes the long-term stressed easy damage of switch shaft; Counterweight limit device of the present invention may be used in the crane lifting operating unit of electric block and trolley type.
Accompanying drawing explanation
Fig. 1 is structural front view of the present invention;
Fig. 2 is the lateral plan of Fig. 1;
Fig. 3 is that the present invention is at weight collision rift action schematic diagram;
Fig. 4 is the connecting base structure schematic diagram in the present invention.
Detailed description of the invention
Now by reference to the accompanying drawings, the specific embodiment of the invention is described in detail in detail:
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of counterweight limit device, comprises Connection Block 1, bob-weight 2, limit switch 3, weight 5, and described bob-weight 2 is provided with connecting bore, and described connecting bore is connected with described Connection Block 1 by bolt pin 21; Described bob-weight 2 can swing around bolt pin 21; Described bob-weight 2 one edge tail is connected with weight 5 by stay cord 4; Described weight 5 is provided with axial cord borehole jack on the steel rope of suspension hook; Described Connection Block 1 is installed a caging bolt 22 and break limit switch 3 for limitting bob-weight overswing; Described Connection Block 1 is connected with described limit switch 3 by screw 35; Described Connection Block 1 is connected with electric block or crane lifting trolley frame by bolt 11; Described limit switch 3 is the micro-switchs adopting TZ series; Described limit switch 3 has a seesaw 31, described seesaw 31 one end is connected to a pin on limit switch 3 and can swings around this pin, and the other end connects a roller 311; Described seesaw 31 is connected to push rod 33, Compress Spring 32, described Compress Spring 32 is when free state, push seesaw 31 and be in maximum open position, now push rod 33 is also in and stretches out maximum position, and push rod 33 inside is connected to circuit contact and is in on-state; Electric wire 34 now on limit switch 3 is connected to the control power supply in crane hook contactless for hoisting; As long as power-on, the electric wire 34 now in limit switch 3 is in "on" position; Crane hook can normally run up and down; Principle of work: when the suspension hook of hoisting crane be in below the normal height allowed work time, weight 5 is in free suspension state, and haul stay cord 4 and make bob-weight 2 be in cw rotation maximum position, now limit switch 3 internal circuit is in on-state; When suspension hook generation pulleying is about to rush to summit, suspension hook is encountered weight 5 and is held in the palm weight rising, and stay cord 4 is relaxed, now bob-weight 2 counter-clockwise swing under eccentric Action of Gravity Field, press against on the roller 311 of limit switch, seesaw 31 swings, until the limited bolt 22 of bob-weight 2 limits; When seesaw 31 is to lower swing, push rod 33 is toward pressing down, and limit switch 3 inner contact is opened, electric wire 34 power-off, has namely cut off the control power supply in contactless for hoisting, makes lift system no longer to ascent direction motion, plays height limit protective effect; When unlatching lift system decline switch, suspension hook descending motion, weight drop, bob-weight 2 is put, and the seesaw 31 of limit switch returns to the state of upwarping again under Compress Spring 32 acts on, and in limit switch 3, circuit is in on-state again.
As shown in Figure 4, described Connection Block 1 is arranged to inverted U-shaped; Described Connection Block is processed with bolt pin-and-hole 15 for hold-down bolt pin, caging bolt hole 12 for mounting limit bolt, screw hole 13 for connecting the screw of limit switch, bolt hole 14 on trolley frame Connection Block being connected to crane lifting mechanism or electric block.
Claims (3)
1. a counterweight limit device, it is characterized in that: comprise Connection Block (1), bob-weight (2), limit switch (3), weight (5), described bob-weight (2) is provided with connecting bore, and described connecting bore is connected with described Connection Block (1) by bolt pin (21); Described bob-weight (2) can swing around bolt pin (21); Described bob-weight (2) edge tail is connected with weight (5) by stay cord (4); Described weight (5) is provided with axial cord borehole jack on the steel rope of suspension hook; The upper installation caging bolt (22) of described Connection Block (1); Described Connection Block (1) is connected with described limit switch (3) by screw (35); Described Connection Block (1) is connected with electric block or crane lifting trolley frame by bolt (11).
2. a kind of counterweight limit device according to claim 1, is characterized in that: described limit switch (3) is the micro-switch adopting TZ series.
3. a kind of counterweight limit device according to claim 1, is characterized in that: described Connection Block (1) is arranged to inverted U-shaped; Described Connection Block is processed with bolt pin-and-hole (15), caging bolt hole (12), screw hole (13), bolt hole (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520071360.0U CN204474227U (en) | 2015-02-02 | 2015-02-02 | A kind of counterweight limit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520071360.0U CN204474227U (en) | 2015-02-02 | 2015-02-02 | A kind of counterweight limit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204474227U true CN204474227U (en) | 2015-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520071360.0U Expired - Fee Related CN204474227U (en) | 2015-02-02 | 2015-02-02 | A kind of counterweight limit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204474227U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174063A (en) * | 2015-10-16 | 2015-12-23 | 安徽华菱汽车有限公司 | Hoisting equipment and heavy hammer position limiting device of hoisting equipment |
| CN106044601A (en) * | 2016-08-10 | 2016-10-26 | 河南新科起重机股份有限公司 | Pry bar type rigid heavy hammer double limiting device |
| CN106081921A (en) * | 2016-08-10 | 2016-11-09 | 河南新科起重机股份有限公司 | The double stopping means of a kind of fork type flexible weight |
| CN106400092A (en) * | 2016-11-08 | 2017-02-15 | 天奇自动化工程股份有限公司 | Heavy bob type vehicle body floating prevention device |
| CN109132874A (en) * | 2018-10-12 | 2019-01-04 | 江苏永钢集团有限公司 | A kind of novel driving fixed pulley wirerope goes out slot warning device |
| CN112573392A (en) * | 2020-11-23 | 2021-03-30 | 宜兴市云顶机械科技有限公司 | Auxiliary limiting device for rotary suspension arm |
| CN114524379A (en) * | 2022-03-13 | 2022-05-24 | 新疆德勤互力工业技术有限公司 | Anti-backrush interlocking protection device for steel wire rope of crane hoisting mechanism |
-
2015
- 2015-02-02 CN CN201520071360.0U patent/CN204474227U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174063A (en) * | 2015-10-16 | 2015-12-23 | 安徽华菱汽车有限公司 | Hoisting equipment and heavy hammer position limiting device of hoisting equipment |
| CN106044601A (en) * | 2016-08-10 | 2016-10-26 | 河南新科起重机股份有限公司 | Pry bar type rigid heavy hammer double limiting device |
| CN106081921A (en) * | 2016-08-10 | 2016-11-09 | 河南新科起重机股份有限公司 | The double stopping means of a kind of fork type flexible weight |
| CN106081921B (en) * | 2016-08-10 | 2018-05-29 | 河南新科起重机股份有限公司 | A kind of double limiting devices of fork type flexible weight |
| CN106400092A (en) * | 2016-11-08 | 2017-02-15 | 天奇自动化工程股份有限公司 | Heavy bob type vehicle body floating prevention device |
| CN106400092B (en) * | 2016-11-08 | 2018-08-14 | 天奇自动化工程股份有限公司 | Weight type vehicle body anti-floating device |
| CN109132874A (en) * | 2018-10-12 | 2019-01-04 | 江苏永钢集团有限公司 | A kind of novel driving fixed pulley wirerope goes out slot warning device |
| CN112573392A (en) * | 2020-11-23 | 2021-03-30 | 宜兴市云顶机械科技有限公司 | Auxiliary limiting device for rotary suspension arm |
| CN114524379A (en) * | 2022-03-13 | 2022-05-24 | 新疆德勤互力工业技术有限公司 | Anti-backrush interlocking protection device for steel wire rope of crane hoisting mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160202 |