CN104085813A - Protector for pneumatic lifting equipment - Google Patents
Protector for pneumatic lifting equipment Download PDFInfo
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- CN104085813A CN104085813A CN201410286008.9A CN201410286008A CN104085813A CN 104085813 A CN104085813 A CN 104085813A CN 201410286008 A CN201410286008 A CN 201410286008A CN 104085813 A CN104085813 A CN 104085813A
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- block
- centrifugal
- safety
- speed limit
- braking
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Abstract
The invention provides a protector for pneumatic lifting equipment and solves the problem of low safety of the conventional pneumatic lifting. The protector comprises a barrel body. A stator is arranged in the barrel body. A lead screw penetrates in the stator. A nut is in threaded connection to the lead screw. The lead screw is sleeved with a piston and a coiler which are in fixed connection. The coiler is connected with the piston through a bearing. A steel wire rope winds on the coiler. The lead screw is further sleeved with a protector body which is fixedly connected with the coiler. The protector body is provided with a disc-shaped frame. A plurality of braking centrifugal blocks are hinged in the frame and provided with eccentric pins. Tension springs are connected between the eccentric pins and the frame. The braking centrifugal blocks are provided with braking clamping portions. When angular acceleration reaches critical angular acceleration, clamped positioning is formed by the braking clamping portions and the stator. In the states, such as sudden falling of weights or abnormal gas source during lifting, safety function of the braking is achieved by the protector.
Description
Technical field
The invention belongs to pneumatic lifting machine technical field, relate to a kind of brake snub structure, particularly a kind of safety for pneumatic hanging device.
Background technology
In the last few years, pneumatic hanging device, with remarkable flexibility function, had obtained increasingly extensive application in commercial production.Particularly in inflammable and explosive occasions such as oil, chemical industry, automobile, mines, be thisly quick on the draw, economic, pollution-free and design operation is simple etc., and advantage seems particularly important.Existing pneumatic hanging device is in actual mechanical process, it is unexpected that emergency situations occur at any time, as load departs from suddenly hook and causes hook up bounce-back rapidly suddenly, control loop pressure is undergone mutation etc., and these surprisingly threaten the personal safety to operating personal.
What China's fitter's shop use was more is the non intelligent property such as electric block, chain block hanging device, and they can not meet frequent starting operation, operation in short-term and pinpoint demand in some inflammable and explosive occasions.China also began one's study and had developed some pneumatic hanging devices in the last few years, but cannot realize proper intelligent balance, and therefore the pneumatic hanging device safety performance of China is low, and the safety of development research and its outfit seems and is even more important.
Summary of the invention
The object of the invention is to have the problems referred to above for existing technology, propose one and utilized rotary centrifugal force principle, be provided with the retaining structure of braking in the situation that angular acceleration reaches critical angle acceleration/accel, tackle various emergency case and realize the safing safety for pneumatic hanging device of timely stall.
Object of the present invention can realize by following technical proposal: a kind of safety for pneumatic hanging device, comprise cylinder body, in described cylinder body, be provided with stator, leading screw stretches through in described stator, on described leading screw, be threaded connection nut, on described leading screw, be also socketed piston and reel, described reel and nut are connected, described reel connects piston by bearing, on described reel, be wound with steel rope, on described leading screw, be also socketed with safety, described safety is connected mutually with reel, described safety has the frame of plate-like, hinged some braking centrifugal-blocks in described frame, on described braking centrifugal-block, eccentric pin shaft is set, between described eccentric pin shaft and frame, be connected back-moving spring, described braking centrifugal-block has braking screens portion, and braking centrifugal-block its braking screens portion in the situation that angular acceleration reaches critical angular acceleration can form clamping location with stator.
This is for the safety of pneumatic hanging device, piston and leading screw are and are slidably socketed, bearing is set on piston, the outer end that reel stretches out stator is connected on bearing, and both form the socket of sliding type, piston driving reel parallel motion thus, and reel synchronously does rotation movement under the driving of screw pair; Reel stretches on the inner of stator by the bolt safety that is connected, and safety is followed reel and synchronously rotated thus.Braking centrifugal-block in frame is and is symmetrical set totally two, and braking centrifugal-block is cam face substantially, and the outer end of cam face is protruding braking screens portion, and a side of this braking screens portion is driving surface.On the perisporium of stator, evenly offer multiple ports, braking is after centrifugal-block stretches out, and its braking screens portion can stretch in the port of stator, and makes the edge phase clamping of driving surface and port.In frame, be fixed with S. A., braking centrifugal-block is socketed on S. A., and can rotate around S. A., and the distance between S. A. and eccentric pin shaft is eccentric throw.
At the above-mentioned safety for pneumatic hanging device, some speed limit centrifugal-blocks are also housed in described frame, described speed limit centrifugal-block and frame form sliding block joint, between the inner of described speed limit centrifugal-block and frame, be connected extension spring, the dual-side of described speed limit centrifugal-block is speed limit screens face, and speed limit centrifugal-block its speed limit screens face in the situation that speed reaches critical speed can form clamping location with stator.Speed limit centrifugal-block in frame is and is symmetrical set totally two, and after speed limit centrifugal-block stretches out, its outside can be stretched in the port of stator, makes the edge phase clamping of speed limit screens face with the port of either side in dual-side.
At the above-mentioned safety for pneumatic hanging device, in the situation that speed reaches critical speed, speed limit centrifugal-block centnifugal force overcomes the elastic pulling force of extension spring, and speed limit centrifugal-block is thrown away; In the situation that angular acceleration reaches critical angle acceleration/accel, centnifugal force overcomes the elastic pulling force of back-moving spring to the torque of S. A., throws away and make to brake centrifugal-block.
At the above-mentioned safety for pneumatic hanging device, on described speed limit centrifugal-block, be arranged with stroke groove, described frame epirelief is established limiting section, and described limiting section is stretched and is embedded in stroke groove, and both form relative sliding connection.When centnifugal force overcomes the elastic pulling force of extension spring, and when speed limit centrifugal-block is thrown away, stroke groove is with respect to limiting section slippage laterally, until limiting section support is against the inner of stroke groove, cause speed limit centrifugal-block to reach overhanging extreme length, the length of stroke groove is the displaceable stroke range of speed limit centrifugal-block.
At the above-mentioned safety for pneumatic hanging device, described frame comprises the basal disc that is positioned at both sides, with some substrates that are positioned at centre, remaining between described substrate have multiple assembly spaces, described braking centrifugal-block and speed limit centrifugal-block are installed in respectively in assembly space, and the outer end of described assembly space has can make to brake uncovered that centrifugal-block or speed limit centrifugal-block stretch out.Four substrates in the middle of the basal disc sandwiched of both sides, and form fixing assembling by screw.Four substrate corrals are arranged, between every adjacent two substrates, there is assembly space, totally four assembly spaces and relative two assembly spaces are identical assembly space, wherein in one group of relative assembly space, place braking centrifugal-block, and another organizes placement speed limit centrifugal-block in relative assembly space.
At the above-mentioned safety for pneumatic hanging device, described basal disc outside is fixed with fix shaft, on described fix shaft, offer circular groove, on described eccentric pin shaft, offer circular groove, one end of described back-moving spring is socketed eccentric pin shaft and is embedded in its circular groove, and the other end is socketed fix shaft and is embedded in its circular groove.
At the above-mentioned safety for pneumatic hanging device, described basal disc inner side is fixed with radius stay, on described radius stay, offer circular groove, U-shaped mouth is offered in the inner of described speed limit centrifugal-block, on described speed limit centrifugal-block, wear locating dowel pin, on the diapire of described U-shaped mouth, offer the assembly opening that is communicated with locating dowel pin, one end of described extension spring is stretched into assembly opening and is socketed locating dowel pin, and the other end is socketed radius stay and is embedded in its circular groove.
At the above-mentioned safety for pneumatic hanging device, the side edge of described substrate is arranged with fitting recess, and described fitting recess is embedded with plane needle roller row.Consider that, when whole safety meets accident, angular acceleration is different, by setting up plane needle roller row, reduce the impact of Coriolis acceleration on resistance.
Compared with prior art, this safety for pneumatic hanging device can be realized following functions:
1, no matter load or source of the gas are in abnormal condition, and safety plays safety guard-safeguard effect to load lifting twocouese simultaneously;
2, load is all in unhook situation, and safety plays brake action;
3, in load, part workpiece increases in the situation of critical speed gradually in unhook and speed limit centrifugal-block, and safety plays speed limit effect;
4, in load, part workpiece reaches in the situation of critical angle acceleration/accel in breaking off relations and braking centrifugal-block, and safety plays brake action;
5,, while causing load acceleration sudden change and braking centrifugal-block to reach critical angle acceleration/accel when source of the gas generation abnormal condition, safety plays brake action;
6,, while causing load speed to increase gradually when source of the gas generation abnormal condition, safety plays speed limit effect;
7, load, in the time of elastic floating state, limits the speed of operator's lifting load;
8,, when safety works, speed limit and braking two aspects are non-interference.
Brief description of the drawings
Fig. 1 is this perspective view for the safety safety of pneumatic hanging device.
Fig. 2 is this decomposition texture schematic diagram for the safety safety of pneumatic hanging device.
Fig. 3 is this speed limit centrifugal block structure schematic diagram for the safety safety of pneumatic hanging device.
Fig. 4 is this part mounting structure schematic diagram for the safety of pneumatic hanging device.
In figure, 1, basal disc; 2, substrate; 3, braking centrifugal-block; 4, S. A.; 5, eccentric pin shaft; 6, fix shaft; 7, back-moving spring; 8, speed limit centrifugal-block; 8a, stroke groove; 9, locating dowel pin; 10, radius stay; 11, extension spring; 12, plane needle roller row; 13, safety; 14, stator.
Detailed description of the invention
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As shown in Figure 1,2 and 3, this safety for pneumatic hanging device comprises cylinder body, in cylinder body, be provided with stator 14, leading screw stretches through in stator 14, on leading screw, be threaded connection nut, be also socketed piston and reel on leading screw, reel and nut are connected, reel connects piston by bearing, is wound with steel rope on reel.On leading screw, be also socketed with safety 13, this safety 13 is connected mutually with reel.
Piston and leading screw are and are slidably socketed, and bearing is set on piston, and the outer end that reel stretches out stator 14 is connected on bearing, and both form the socket of sliding type, piston driving reel parallel motion thus, and reel synchronously does rotation movement under the driving of screw pair; Reel stretches on the inner of stator 14 by the bolt safety 13 that is connected, and safety 13 is followed reel and synchronously rotated thus.On the perisporium of stator 14, evenly offer multiple ports, and the concrete rectangular mouth of port.
Safety 13 has the frame of plate-like, and frame comprises two basal discs 1 that are positioned at both sides, with four substrates 2 that are positioned at centre, i.e. and four substrates 2 in the middle of basal disc 1 sandwiched of both sides, and form fixing assembling by screw.Four substrate 2 corrals are arranged, between every adjacent two substrates 2, there is assembly space, totally four assembly spaces and relative two assembly spaces are identical assembly space, wherein in one group of relative assembly space, place braking centrifugal-block 3, and another organizes placement speed limit centrifugal-block 8 in relative assembly space.The outer end of assembly space has can make to brake uncovered that centrifugal-block 3 or speed limit centrifugal-block 8 stretch out.
On basal disc 1, be fixed with S. A. 4, braking centrifugal-block 3 is socketed on S. A. 4, and can rotate around S. A. 4.On braking centrifugal-block 3, eccentric pin shaft 5 is set, the distance between S. A. 4 and eccentric pin shaft 5 is eccentric throw.Basal disc 1 outside is fixed with fix shaft 6, on fix shaft 6, offer circular groove, on eccentric pin shaft 5, offer circular groove, between eccentric pin shaft 5 and fix shaft 6, be connected back-moving spring 7, the one end that is back-moving spring 7 is socketed eccentric pin shaft 5 and is embedded in its circular groove, and the other end is socketed fix shaft 6 and is embedded in its circular groove.
Braking centrifugal-block 3 in frame is and is symmetrical set totally two, braking centrifugal-block 3 is cam face substantially, and the outer end of cam face is protruding braking screens portion, one side of this braking screens portion is driving surface, and braking centrifugal-block 3 its braking screens portion in the situation that angular acceleration increases to critical angle acceleration/accel can form clamping location with stator 14.
Speed limit centrifugal-block 8 is installed in assembly space, and forms sliding block joint with frame.Basal disc 1 inner side is fixed with radius stay 10, on this radius stay 10, offers circular groove.U-shaped mouth is offered in the inner of speed limit centrifugal-block 8, also wears locating dowel pin 9 on speed limit centrifugal-block 8, and on the diapire of U-shaped mouth, offers the assembly opening that is communicated with locating dowel pin 9.Configure an extension spring 11, make its one end stretch into assembly opening and be socketed locating dowel pin 9, the other end is socketed radius stay 10 and is embedded in its circular groove.
Speed limit centrifugal-block 8 in frame is and is symmetrical set totally two, and the dual-side of speed limit centrifugal-block 8 is speed limit screens face, and speed limit centrifugal-block 8 its speed limit screens face in the situation that speed reaches critical speed can form clamping location with stator 14.
On speed limit centrifugal-block 8, be arranged with stroke groove 8a, basal disc 1 inner side is convexly equipped with limiting section, and this limiting section is stretched and embedded in stroke groove 8a, and both form relative sliding connection.When centnifugal force overcomes the elastic pulling force of extension spring 11, and when speed limit centrifugal-block 8 is thrown away, stroke groove 8a is with respect to limiting section slippage laterally, until limiting section support is against the inner of stroke groove 8a, cause speed limit centrifugal-block 8 to reach overhanging extreme length, the length of stroke groove 8a is the displaceable stroke range of speed limit centrifugal-block 8.
In the situation that speed increases large critical speed, overcome the elastic pulling force of extension spring 11 by centnifugal force, and speed limit centrifugal-block 8 is thrown away; In the situation that angular acceleration reaches critical angle acceleration/accel, the torque of the elastic pulling force that overcomes back-moving spring 7 by centnifugal force to S. A. 4, throws away and make to brake centrifugal-block 3.
The side edge of substrate 2 is arranged with fitting recess, and this fitting recess is embedded with plane needle roller row 12.Consider that when whole safety 13 meets accident, angular acceleration is different, by setting up plane needle roller row 12, reduce the impact of Coriolis acceleration on resistance.
This is used for the working process of the safety of pneumatic hanging device:
In the time that tractive weight rises, gas push piston moves to left, and piston promotes reel translation, and synchronously orders about reel and rotate on leading screw, by Wound steel rope, weight is mentioned thus; Now safety 13 does rotation and axially movable compound motion with reel.In the time discharging weight decline, gas push piston moves to right, and in like manner piston promotes reel counteragent, and safety 13 is made reverse compound motion in company with reel.
A, when weight is in lifting process, when certain sub-fraction part on weight breaks off relations suddenly, but angular acceleration does not reach critical angle acceleration/accel and speed reaches in the situation of critical speed, speed limit centrifugal-block 8 overcomes the elastic pulling force of extension spring 11 and is thrown out of, its outside is stretched in the port of stator 14, make the edge phase clamping of speed limit screens face with the port of either side in dual-side, slow-revving object falls in realization, Speed Reduction is to critical speed, and speed limit centrifugal-block 8 resets under the pulling force effect of extension spring 11; The effect of weight decline process in like manner.When bleed pressure sudden change is not while being very large, speed limit centrifugal-block 8 also plays deceleration, speed limit effect in addition.
B, when weight is in lifting process, when weight all breaks off relations suddenly, when angular acceleration reaches critical angle acceleration/accel, the torque of the elastic pulling force that braking centrifugal-block 3 overcomes back-moving spring 7 to S. A. 4 and being thrown out of, the braking screens portion of this braking centrifugal-block 3 can stretch in the port of stator 14, and make the edge phase clamping of driving surface and port, reach braking effect; With should weight in decline process, when weight breaks off relations, another braking centrifugal-block 3 works.These two braking centrifugal-blocks 3 also work in the situation that gaseous tension suddenlys change in addition.
This safety for pneumatic hanging device can be realized following functions:
1, no matter load or source of the gas are in abnormal condition, and safety 13 plays safety guard-safeguard effect to load lifting twocouese simultaneously;
2, load is all in unhook situation, 13 brake actions of safety;
3, in load, part workpiece increases in critical speed situation gradually in unhook and speed limit centrifugal-block, and safety 13 plays speed limit effect;
4, in load, part workpiece reaches in the situation of critical angle acceleration/accel in breaking off relations and braking centrifugal-block, 13 brake actions of safety;
5, while causing load acceleration sudden change and braking centrifugal-block to reach critical angle acceleration/accel when source of the gas generation abnormal condition, 13 brake actions of safety;
6,, while causing load speed to increase gradually when source of the gas generation abnormal condition, safety 13 plays speed limit effect;
7, load, in the time of elastic floating state, limits the speed of operator's lifting load;
8,, when safety 13 works, speed limit and braking two aspects are non-interference.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although more used basal disc 1 herein; Substrate 2; Braking centrifugal-block 3; S. A. 4; Eccentric pin shaft 5; Fix shaft 6; Back-moving spring 7; Speed limit centrifugal-block 8; Stroke groove 8a; Locating dowel pin 9; Radius stay 10; Extension spring 11; Plane needle roller row 12; Safety 13; Stator 14 terms such as grade, but do not get rid of the possibility that uses other term.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all to disagree with spirit of the present invention.
Claims (7)
1. the safety for pneumatic hanging device, comprise cylinder body, in described cylinder body, be provided with stator, leading screw stretches through in described stator, on described leading screw, be threaded connection nut, on described leading screw, be also socketed piston and reel, described reel and nut are connected, described reel connects piston by bearing, on described reel, be wound with steel rope, it is characterized in that, on described leading screw, be also socketed with safety, described safety is connected mutually with reel, described safety has the frame of plate-like, hinged some braking centrifugal-blocks in described frame, on described braking centrifugal-block, eccentric pin shaft is set, between described eccentric pin shaft and frame, be connected back-moving spring, described braking centrifugal-block has braking screens portion, and braking centrifugal-block its braking screens portion in the situation that angular acceleration reaches critical angle acceleration/accel can form clamping location with stator.
2. the safety for pneumatic hanging device according to claim 1, it is characterized in that, some speed limit centrifugal-blocks are also housed in described frame, described speed limit centrifugal-block and frame form sliding block joint, between the inner of described speed limit centrifugal-block and frame, be connected extension spring, the dual-side of described speed limit centrifugal-block is speed limit screens face, and speed limit centrifugal-block its speed limit screens face in the situation that speed reaches critical speed can form clamping location with stator.
3. the safety for pneumatic hanging device according to claim 2, is characterized in that, on described speed limit centrifugal-block, is arranged with stroke groove, and described frame epirelief is established limiting section, and described limiting section is stretched and embedded in stroke groove, and both form relative sliding connection.
4. the safety for pneumatic hanging device according to claim 2, it is characterized in that, described frame comprises the basal disc that is positioned at both sides, with some substrates that are positioned at centre, remaining between described substrate have multiple assembly spaces, described braking centrifugal-block and speed limit centrifugal-block are installed in respectively in assembly space, and the outer end of described assembly space has can make to brake uncovered that centrifugal-block or speed limit centrifugal-block stretch out.
5. the safety for pneumatic hanging device according to claim 5, it is characterized in that, described basal disc outside is fixed with fix shaft, on described fix shaft, offer circular groove, on described eccentric pin shaft, offer circular groove, one end of described back-moving spring is socketed eccentric pin shaft and is embedded in its circular groove, and the other end is socketed fix shaft and is embedded in its circular groove.
6. the safety for pneumatic hanging device according to claim 5, it is characterized in that, described basal disc inner side is fixed with radius stay, on described radius stay, offer circular groove, U-shaped mouth is offered in the inner of described speed limit centrifugal-block, on described speed limit centrifugal-block, wears locating dowel pin, offers the assembly opening that is communicated with locating dowel pin on the diapire of described U-shaped mouth, one end of described extension spring is stretched into assembly opening and is socketed locating dowel pin, and the other end is socketed radius stay and is embedded in its circular groove.
7. the safety for pneumatic hanging device according to claim 5, is characterized in that, the side edge of described substrate is arranged with fitting recess, and described fitting recess is embedded with plane needle roller row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410286008.9A CN104085813A (en) | 2014-06-24 | 2014-06-24 | Protector for pneumatic lifting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410286008.9A CN104085813A (en) | 2014-06-24 | 2014-06-24 | Protector for pneumatic lifting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104085813A true CN104085813A (en) | 2014-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410286008.9A Pending CN104085813A (en) | 2014-06-24 | 2014-06-24 | Protector for pneumatic lifting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104085813A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884908A (en) * | 2015-12-15 | 2017-06-23 | 上海瑞纽机械股份有限公司 | A kind of mechanical damper of radial direction braking |
| CN110281998A (en) * | 2019-06-03 | 2019-09-27 | 国网浙江省电力有限公司金华供电公司 | A kind of intelligent storage cage |
| CN111348603A (en) * | 2020-03-20 | 2020-06-30 | 福建省东山县辉永泰体育用品实业有限公司 | Improved electric lifter and manufacturing method thereof |
| CN111661751A (en) * | 2020-06-15 | 2020-09-15 | 颜肇宗 | Utilize centrifugal force principle's crane ship hoist cable stall auto-lock insurance structure |
-
2014
- 2014-06-24 CN CN201410286008.9A patent/CN104085813A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884908A (en) * | 2015-12-15 | 2017-06-23 | 上海瑞纽机械股份有限公司 | A kind of mechanical damper of radial direction braking |
| CN106884908B (en) * | 2015-12-15 | 2019-08-20 | 上海瑞纽机械股份有限公司 | A kind of mechanical damper radially braked |
| CN110281998A (en) * | 2019-06-03 | 2019-09-27 | 国网浙江省电力有限公司金华供电公司 | A kind of intelligent storage cage |
| CN111348603A (en) * | 2020-03-20 | 2020-06-30 | 福建省东山县辉永泰体育用品实业有限公司 | Improved electric lifter and manufacturing method thereof |
| CN111348603B (en) * | 2020-03-20 | 2021-04-23 | 福建省东山县辉永泰体育用品实业有限公司 | Improved electric lifter and manufacturing method thereof |
| CN111661751A (en) * | 2020-06-15 | 2020-09-15 | 颜肇宗 | Utilize centrifugal force principle's crane ship hoist cable stall auto-lock insurance structure |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141008 |
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| WD01 | Invention patent application deemed withdrawn after publication |