CN203728357U - Low speed anti-drop safety device - Google Patents
Low speed anti-drop safety device Download PDFInfo
- Publication number
- CN203728357U CN203728357U CN201420078332.7U CN201420078332U CN203728357U CN 203728357 U CN203728357 U CN 203728357U CN 201420078332 U CN201420078332 U CN 201420078332U CN 203728357 U CN203728357 U CN 203728357U
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- centrifugal
- block
- bearing
- low speed
- safety device
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- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 230000004043 responsiveness Effects 0.000 description 7
- 230000007123 defense Effects 0.000 description 5
- 239000013536 elastomeric material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model relates to a low speed anti-drop safety device, wherein a brake gear is supported on an end cover and a brake drum through a big bearing and a small bearing, a support seat is arranged on the break gear, a first and a second centrifugal blocks are arranged on the support seat through a bearing and a supporting pin shaft, and are distributed relative to a rotating center of the low speed anti-drop safety device in a central symmetry mode, and a connecting rod is connected with the tail portion of the first centrifugal block and a pin hole arranged on the front portion of the second centrifugal block through a pin shaft or a bolt, thereby guaranteeing the first and the second centrifugal blocks to be synchronous in work positions. A thrust bolt is arranged on the tail portion of the second centrifugal block through a third pin shaft, a speed adjusting spring is run through on the thrust bolt, the first centrifugal blocks is compressed on the support seat through push force of the speed adjusting spring, a belleville spring and a compression nut are arranged on a screw rod which is arranged on the end portion of the outer side of the brake drum, and the pressure of the belleville spring is transmitted to the brake drum through the compression nut. The low speed anti-drop safety device can detect whether the speed of a protective target running part is more than a preset value in a low speed through a speed limit mechanism, and can automatically brake running parts, thereby achieving low speed running.
Description
Technical field
The utility model belongs to the overspeed protection device of straight line and the mechanical part that rotatablely moves, relates to a kind of low speed anti-falling safety device, and particularly the fall arrest of a kind of pinion and-rack lifting working platform and low speed building hoist is protected safety.
Background technology
Anti-falling safety device is most important safety device in building hoist; its speed limiting mechanism adopts centrifugal principle; existing safety generally adopts the form of single centrifugal-block; in the time that the raising of safety operating speed reaches default protection speed; the predetermincd tension that centrifugal-block overcomes speed setting spring outwards throws away, and realizes restriction speed and triggers.Because the two the common impact of conducting oneself with dignity of speed setting initial tension of spring and centrifugal-block is depended in the position of centrifugal-block, in the situation that safety responsiveness is lower, the relative centrifugal-block deadweight of centnifugal force proportion is less, responsiveness is subject to the impact of centrifugal-block deadweight larger, just very unstable in the time that safety responsiveness is lower, even cannot realize.
Along with the development of form of construction work and product diversification technology; lifting working platform and low speed building hoist are rapidly developed; because lifting working platform kind equipment running velocity is very low; limitation based on current common safety to minimal protection speed, those skilled in the art are devoted to research and develop a kind of low speed anti-falling safety device of simple in structure, dependable performance.
Summary of the invention
Task of the present utility model is to provide a kind of improved low speed anti-falling safety device, it is a kind of anti-dropping safety device of applicable low speed environments work, whether the speed that the speed limiting mechanism of this device can detect objective of defense operation parts in low speed situation exceedes preset value, and can automatically brake and make its stop motion operation parts at the brake portion that exceedes safety after preset value, overcome existing safety technology in the unsettled defect of low cruise state action speed.
Technical solution of the present utility model is as follows:
A kind of low speed anti-falling safety device, it is the anti-falling safety device of a kind of pair of Weight type speed limiting mechanism, comprises safety housing, end cap, the first centrifugal-block, the second centrifugal-block, bearing, connecting rod, thrust bolt, governing spring, spring bracket, little bearing, large bearing, spragging gear, brake wheel, disk spring and pressurizing nut;
On described housing, end cap is installed, spragging gear is bearing on end cap and brake wheel by large bearing and little bearing, erection support on spragging gear, bearing is connected by flat key with spragging gear, and the lock torque of brake drum effect on the first centrifugal-block or the second centrifugal-block is delivered to spragging gear by flat key;
Described the first centrifugal-block and the second centrifugal-block are arranged on bearing by bearing and supporting shaft, and the first centrifugal-block and the second centrifugal-block are with respect to the safety centre of gration layout that is centrosymmetric;
Described connecting rod connects the first centrifugal-block afterbody and the anterior pin-and-hole of the second centrifugal-block by bearing pin or bolt, ensures that two centrifugal-block control positioies are synchronous;
Described the second centrifugal-block afterbody is equipped with thrust bolt by the 3rd bearing pin, and thrust bolt is equipped with governing spring, and the thrust of governing spring is pressed on bearing the first centrifugal-block, and thrust can regulate by setting nut;
On described brake wheel outboard end screw rod, disk spring and pressurizing nut are housed, the pressure of disk spring passes to brake wheel by pressurizing nut.
Described safety housing conical surface inner side is pasted with the friction lining that can increase brake wheel braking force.
Described the first centrifugal-block end is not established connecting rod one side the balancing bolt for equalizing gear part quality is housed.
Described spragging gear is joint shaft gear.
Described connecting rod is made up of elastomeric material, is elastic body, and when safety work, length of connecting rod can be adjusted automatically.
The utility model proposes a kind of anti-dropping safety device and method of designing thereof of applicable low speed environments work, whether the speed that the speed limiting mechanism of this device can detect objective of defense operation parts in low speed situation exceedes preset value, and can automatically brake and make its stop motion to operation parts at the brake portion that exceedes safety after preset value.
Low speed anti-falling safety device of the present utility model is simple in structure, dependable performance, its structural principle and production form can be used for lifting working platform, low speed building hoist, window cleaning equipment, large-scale recreation facility etc. need to carry out to the working part of making straight line or rotatablely move the occasion of speed limit.
Technical thought of the present utility model be arrange two groups of relative main shafts be centrosymmetric arrange centrifugal-block, centrifugal-block is connected by bearing pin with bearing, and connect two centrifugal-blocks with connecting rod, ensure that the geometric position of connecting rod two ends hinge and two centrifugal-block center of turns forms the summit of four jiaos of parallelogram simultaneously.Due to the effect of connecting rod mechanism, ensure that the movement relation of two centrifugal-blocks is centrosymmetric, when safety action, two centrifugal-blocks are synchronously opened, and reduce or eliminate the impact of centrifugal-block gravity on safety responsiveness, realize the low cruise of safety.
The utility model is in implementation procedure, when practical structures design, can figurately change, for easy to process, improve the stability of responsiveness, can make connecting rod with elastomeric material, when safety work, allow by the distortion of connecting rod, the phase place of two centrifugal-blocks suitably to be departed from, eliminate the adverse effect of Mismachining tolerance to speed limiting mechanism.For eliminating the connecting rod interference of conduct oneself with dignity to safety responsiveness, in the time that needs are more accurately controlled safety responsiveness, can with the centrifugal-block afterbody use balancing bolt balance portion connecting rod quality of elastic link opposite side.
Brief description of the drawings
Fig. 1 is the structure principle chart of a kind of low speed anti-falling safety device of the present utility model.
Fig. 2 is the axial section of low speed anti-falling safety device of the present utility model.
Reference numeral:
1 is the first centrifugal-block, and 2 is balancing bolt, and 3 is bearing, and 4 is supporting shaft, and 5 is bearing, 6 is the first bearing pin, and 7 is connecting rod, and 8 is the second centrifugal-block, and 9 is the second bearing pin, and 10 is the 3rd bearing pin, 11 is thrust bolt, and 12 is screw, and 13 is setting nut, and 14 is positioning cap, 15 is governing spring, and 16 is spring bracket, and 17 is little bearing, and 18 is flat key, 19 is brake wheel, and 20 is end cap, and 21 is large bearing, and 22 is spragging gear, 23 is housing, and 24 is friction lining, and 25 is disk spring, and 26 is pressurizing nut.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is elaborated.
Referring to Fig. 1 and Fig. 2, low speed anti-falling safety device of the present utility model is the anti-falling safety device of a kind of pair of Weight type speed limiting mechanism, and it is mainly made up of parts such as safety housing 23, end cap 20, the first centrifugal-block 1, the second centrifugal-block 8, bearing 5, connecting rod 7, thrust bolt 11, governing spring 15, spring bracket 16, little bearing 17, large bearing 21, spragging gear 22, brake wheel 19, disk spring 25 and pressurizing nuts 26.
End cap 20 is installed on safety housing 23, spragging gear 22 is bearing on end cap 20 and brake wheel 19 by large bearing 21 and little bearing 17, spragging gear 22 is joint shaft gear, erection support 5 on spragging gear 22, bearing 5 is connected by flat key 18 with spragging gear 22, and the lock torque that brake wheel 19 acts on the first centrifugal-block 1 or the second centrifugal-block 8 is delivered to spragging gear 22 by flat key 18.
The first centrifugal-block 1 and the second centrifugal-block 8 are arranged on bearing 5 by bearing 3 or plain bearing and supporting shaft 4, the first centrifugal-block 1 and the second centrifugal-block 8, with respect to the safety centre of gration layout that is centrosymmetric, are provided with groove in the middle of the both ends of the first centrifugal-block 1 and the second centrifugal-block 8.
Connecting rod 7 two ends are connected with the second bearing pin 9 by the first bearing pin 6 with the pin-and-hole of the first centrifugal-block 1 afterbody and the second centrifugal-block 8 front portions respectively through centrifugal-block intermediate groove, the geometric position of connecting rod 7 two ends hinges and two centrifugal-block center of turns forms the summit of four jiaos of parallelogram, ensures that two centrifugal-block control positioies are synchronous.For reducing accuracy of manufacture, connecting rod 7 can be made up of elastomeric material, is elastic body, and when safety work, length of connecting rod can be adjusted automatically, compensation manufacturing errors.
Connecting rod one side is not established in the first centrifugal-block 1 end can install or not install the balancing bolt 2 for equalizing gear part quality as required.The second centrifugal-block 8 afterbodys are equipped with thrust bolt 11 by the 3rd bearing pin 10, thrust bolt 11 is equipped with governing spring 15, the bottom supporting of governing spring 15 is on the spring bracket 16 of being fixed by screw 12, the other end of governing spring 15 is pressed on setting nut 13 by positioning cap 14, the thrust of governing spring 15 is pressed on bearing 5 the second centrifugal-block 8, by connecting rod 7, the first centrifugal-block 1 is also pressed on bearing 5.
On brake wheel 19 outboard end screw rods, disk spring 25 and pressurizing nut 26 are housed, the pressure of disk spring 25 passes to brake wheel 19 by pressurizing nut 26.Safety housing 23 conical surface inner sides are pasted with the friction lining 24 that can increase brake wheel 19 braking forces.
Low speed anti-falling safety device of the present utility model can be used for the low cruise machineries such as lifting working platform, low speed elevation machine, window cleaning equipment and carries out safety guard-safeguard, and this low speed anti-falling safety device has adopted following wherein a kind of version in actual installation is used.
As shown in Figure 1, the first centrifugal-block 1 and second centrifugal-block 8 of safety are arranged on bearing 5 by plain bearing 3 and supporting shaft 4, and two centrifugal-block assemblies are in full accord and with respect to the safety center shaft layout that is centrosymmetric.Centrifugal-block is provided with connecting bore equidistantly in the both sides of supporting shaft 4 axis holes, in the middle of the both ends of the first centrifugal-block 1 and the second centrifugal-block 8, offer groove simultaneously, connecting rod 7 couples together front pin aperture the first bearing pin 6 and second bearing pin 9 of the first centrifugal-block 1 afterbody pin-and-hole and the second centrifugal-block 8 through groove, ensures that two centrifugal-block control positioies are synchronous.The pin-and-hole place of connecting rod one side is not established in the first centrifugal-block 1 front portion, and the balancing bolt 2 for equalizing gear part quality can be installed on demand.Afterbody at the second centrifugal-block 8 is installed a thrust bolt 11 by the 3rd bearing pin 10, thrust bolt 11 is installed with governing spring 15, the bottom supporting of governing spring 15 is on the spring bracket 16 fixing by screw 12, and the other end of governing spring 15 is pressed on setting nut 13 by positioning cap 14.The thrust of governing spring 15 is pressed on bearing 5 the second centrifugal-block 8, can regulate the thrust of the second centrifugal-block 8 to bearing 5 by setting nut 13 governing speed springs 15.
As shown in Figure 2, the spragging gear 22 of safety is joint shaft gear, is bearing on safety end cap 20 and brake wheel 19 by large bearing 21 and little bearing 17, and bearing 5 is installed on spragging gear 22, and bearing 5 is connected by flat key 18 with spragging gear 22.The lock torque that brake wheel 19 acts on the first centrifugal-block 1 or the second centrifugal-block 8 is delivered to spragging gear 22 by flat key 18.
Connecting rod 7 can require to select rigid material or elastomeric material to make according to accuracy of manufacture, and while selecting elastomeric material, when safety work, length of connecting rod can be adjusted automatically.
The principle of work of a kind of low speed anti-falling safety device of the present utility model is as follows:
The joint shaft gear of anti-falling safety device is that spragging gear 22 engages with tooth bar or other corresponding gears on building hoist guide rail bracket, when objective of defense operation, gear 22 rotates under the effect of engaging tooth, drives bearing 5 simultaneously and be arranged on bearing 5 the first centrifugal-block 1 above to rotate together with governing spring 15 with the second centrifugal-block 8.Under normal circumstances, the first centrifugal-block 1 and the second centrifugal-block 8 are close to bearing 5 under the effect of the predetermincd tension of governing spring 15, in the time that safety operating speed exceedes setting value, the first centrifugal-block 1 and the second centrifugal-block 8 overcome the predetermincd tension of governing spring 15 and outwards open under the effect of centnifugal force, the first centrifugal-block 1 front end engages with the internal tooth of brake wheel 19 and drives brake wheel 19 to rotate, be arranged on pressurizing nut 26 on brake wheel 19 outboard end screw rods because structural limitations can not be rotated, under the effect of spiral, move axially to the direction of compression disk spring 25 and move, the pressure of disk spring 25 passes to brake wheel 19 by pressurizing nut 26, brake wheel 19 and the thrust of the friction lining 24 that sticks on safety housing 23 conical surface inner sides are increased, friction lining 24 also increases gradually to the braking force of brake wheel 19, until the objective of defense is out of service.
In sum, low speed anti-falling safety device of the present utility model is simple in structure, dependable performance, whether the speed that can detect objective of defense operation parts by its speed limiting mechanism in low speed situation exceedes preset value, and can automatically brake and make its stop motion operation parts at the brake portion that exceedes safety after preset value, realize the low cruise of safety.
Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment is only for the utility model is described, and not with opposing restriction of the present utility model, as long as within the scope of connotation of the present utility model, variation, the modification etc. of above-described embodiment all will be dropped in the scope of the utility model claim.
Claims (5)
1. a low speed anti-falling safety device, it is characterized in that: it is the anti-falling safety device of a kind of pair of Weight type speed limiting mechanism, comprise safety housing (23), end cap (20), the first centrifugal-block (1), the second centrifugal-block (8), bearing (5), connecting rod (7), thrust bolt (11), governing spring (15), spring bracket (16), little bearing (17), large bearing (21), spragging gear (22), brake wheel (19), disk spring (25) and pressurizing nut (26);
The upper end cap (20) of installing of described housing (23), spragging gear (22) is bearing on end cap (20) and brake wheel (19) by large bearing (21) and little bearing (17), the upper erection support (5) of spragging gear (22), bearing (5) is connected by flat key (18) with spragging gear (22), and the lock torque that brake wheel (19) acts on the first centrifugal-block (1) or the second centrifugal-block (8) is delivered to spragging gear (22) by flat key (18);
Described the first centrifugal-block (1) and the second centrifugal-block (8) are arranged on bearing (5) by bearing (3) and supporting shaft (4) and go up, and the first centrifugal-block (1) and the second centrifugal-block (8) are with respect to the safety centre of gration layout that is centrosymmetric;
Described connecting rod (7) connects the first centrifugal-block (1) afterbody and the anterior pin-and-hole of the second centrifugal-block (8) by bearing pin or bolt, ensures that two centrifugal-block control positioies are synchronous;
Described the second centrifugal-block (8) afterbody is equipped with thrust bolt (11) by the 3rd bearing pin (10), thrust bolt (11) is equipped with governing spring (15), it is upper that the thrust of governing spring (15) makes the first centrifugal-block (1) be pressed on bearing (5), and thrust can be passed through setting nut (13) and regulate;
Disk spring (25) and pressurizing nut (26) are housed on described brake wheel (19) outboard end screw rod, and the pressure of disk spring (25) passes to brake wheel (19) by pressurizing nut (26).
2. low speed anti-falling safety device as claimed in claim 1, is characterized in that: described safety housing (23) conical surface inner side is pasted with the friction lining (24) that can increase brake wheel (19) braking force.
3. low speed anti-falling safety device as claimed in claim 1, is characterized in that: described the first centrifugal-block (1) end is not established connecting rod one side the balancing bolt (2) for equalizing gear part quality is housed.
4. low speed anti-falling safety device as claimed in claim 1, is characterized in that: described spragging gear (22) is joint shaft gear.
5. low speed anti-falling safety device as claimed in claim 1, is characterized in that: described connecting rod (7) is elastic body, and when safety work, length of connecting rod can be adjusted automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420078332.7U CN203728357U (en) | 2014-02-25 | 2014-02-25 | Low speed anti-drop safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420078332.7U CN203728357U (en) | 2014-02-25 | 2014-02-25 | Low speed anti-drop safety device |
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| Publication Number | Publication Date |
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| CN203728357U true CN203728357U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420078332.7U Expired - Lifetime CN203728357U (en) | 2014-02-25 | 2014-02-25 | Low speed anti-drop safety device |
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| CN (1) | CN203728357U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818793A (en) * | 2014-02-25 | 2014-05-28 | 上海市建筑科学研究院科技发展总公司 | Low-speed anti-falling safety device |
| CN105375680A (en) * | 2015-12-09 | 2016-03-02 | 无锡江南奕帆电力传动科技股份有限公司 | Centrifugal device for alternating current and direct current dual-purpose motor |
| CN107458969A (en) * | 2017-10-11 | 2017-12-12 | 长治市潞安合力机械有限责任公司 | A kind of monorail crane centrifuges speed limited wheel |
| CN114772409A (en) * | 2022-03-22 | 2022-07-22 | 中新国测检测有限公司 | Track speed limiter |
| CN115285816A (en) * | 2022-08-25 | 2022-11-04 | 中际联合（北京）科技股份有限公司 | Climbing device and climbing system |
| CN115384648A (en) * | 2022-08-25 | 2022-11-25 | 中际联合（北京）科技股份有限公司 | Climbing device and climbing system |
-
2014
- 2014-02-25 CN CN201420078332.7U patent/CN203728357U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818793A (en) * | 2014-02-25 | 2014-05-28 | 上海市建筑科学研究院科技发展总公司 | Low-speed anti-falling safety device |
| CN103818793B (en) * | 2014-02-25 | 2016-01-27 | 上海市建筑科学研究院科技发展有限公司 | A kind of low speed anti-falling safety device |
| CN105375680A (en) * | 2015-12-09 | 2016-03-02 | 无锡江南奕帆电力传动科技股份有限公司 | Centrifugal device for alternating current and direct current dual-purpose motor |
| CN107458969A (en) * | 2017-10-11 | 2017-12-12 | 长治市潞安合力机械有限责任公司 | A kind of monorail crane centrifuges speed limited wheel |
| CN114772409A (en) * | 2022-03-22 | 2022-07-22 | 中新国测检测有限公司 | Track speed limiter |
| CN114772409B (en) * | 2022-03-22 | 2023-11-14 | 中新国测检测有限公司 | Rail speed limiter |
| CN115285816A (en) * | 2022-08-25 | 2022-11-04 | 中际联合（北京）科技股份有限公司 | Climbing device and climbing system |
| CN115384648A (en) * | 2022-08-25 | 2022-11-25 | 中际联合（北京）科技股份有限公司 | Climbing device and climbing system |
| CN115384648B (en) * | 2022-08-25 | 2024-03-15 | 中际联合（北京）科技股份有限公司 | Climbing device and climbing system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |