CN102190231A - Novel elevator falling prevention device - Google Patents
Novel elevator falling prevention device Download PDFInfo
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- CN102190231A CN102190231A CN2011101706070A CN201110170607A CN102190231A CN 102190231 A CN102190231 A CN 102190231A CN 2011101706070 A CN2011101706070 A CN 2011101706070A CN 201110170607 A CN201110170607 A CN 201110170607A CN 102190231 A CN102190231 A CN 102190231A
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- brake control
- control lever
- connecting rod
- elevator
- novel elevator
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Abstract
The invention discloses a novel elevator falling prevention device. The novel elevator falling prevention device is connected with an elevator lifting rod; a support is arranged at the bottom of a cage; the sides of the supports are provided with a left brake arm, a right brake arm and a connecting rod; the two brake arms are symmetrically arranged on two sides of a T-shaped guide rail; the outer ends of the brake arms are provided with chutes which are movably pivoted with fixed pin rolls on the support; the inner ends of the brake arms are friction ends having certain gaps with the two sides of the T-shaped guide rail; the middles of the brake arms are connected with the connecting rod through transmission pin rolls; and two ends of the connecting rod are symmetrically pivoted with left and right brake arms. The novel elevator falling prevention device has constant brake deceleration, can ensure riding comfortableness and safety, simplifies elevator design requirements, has a simple and compact structure, greatly simplifies the conventional structural form of combining clamping springs with brake blocks/guide sliders, saves manufacturing working hour cost, contributes to energy conservation and environmental friendliness, and improves working reliability of products.
Description
Technical field
The present invention relates to the lift facility field, especially a kind of novel elevator anti-fall device.
Background technology
" car " refers in the lift facility herein, a space structure of carrying passenger and goods.Elevator " load " refers to the passenger of carrying in the car and the weight of goods.Elevator " gross load " refers to the summation of car deadweight together with its load.If special emphasizing not, " car " speech is often made a general reference together with load in interior whole carriage herein.
The gripping power of safety tongs refers to the power of safety tongs glancing impact clamping guide rail, and this is a kind of positive pressure to guide rail surface.At glancing impact, this positive pressure produces friction force, plays brake action, promptly claims the braking force of safety tongs at safety tongs.When touching upon the performance of safety tongs, the notion of braking force or gripping power is consistent often.
The lift car bottom is equipped with anti-fall device and is called safety tongs, when elevator moves downwards, speed surpasses permissible value, even under the situation of suspension gear fracture, velocity limiter produces action, lift safety tongs, make safety tongs clamp guide rail, produce friction force upwards, implement emergency braking car, make the car stop and keep quiescence, thereby prevent that lift car from falling.In GB7588 " elevator manufacturing and installation safety standard ", safety tongs there is detailed regulation.
Safety tongs is divided into instantaneous safety and progressive safety gear according to course of action, and instantaneous safety adopts rigid bearing structure, produces very big braking force during action, and stop has " instantaneous " braking effect apart from weak point, the car severity that withstands shocks; Progressive safety gear has the effect of " gradual " braking, and the impulsive force that glancing impact produces is less.Above-mentioned two class safety tongs performance differences are that their " braking deceleration " has a great difference." braking deceleration " is the speed that mobile is slowed down from state of kinematic motion, selection to " braking deceleration ", should be from the consideration of ride comfort sense and safety two aspects, when the braking deceleration of lift car too small, the car skidding distance is oversize when meaning emergency braking, and the probability that car bumps against the hoistway bottom increases.When the braking deceleration of lift car excessive, except comfort is bad, also will be to the personnel in the car, goods, car self so that guide rail all produce greater impact, possible initiation potential and destruction.Therefore in GB7588 " elevator manufacturing and installation safety standard ", the applicability of safety tongs is clearly stipulated: instantaneous safety can only be applicable to that command speed is no more than the elevator of 0.63m/s; And, should adopt progressive safety gear when rated speed of lift during greater than 0.63m/s.Progressive safety gear should have the braking deceleration of appropriateness, to guarantee good comfort and safety.Relevant clauses statement in " elevator manufacturing and installation safety standard ", desirable braking deceleration is that 0.6g(" g " is an acceleration due to gravity).
Existing asymptotic expression safety tongs mainly is to be constituted by pedestal, fastening spring and slipper/slider guide.Its design concept is " utilizing the certain variations amount of fastening spring to obtain specific gripping power ".The slipper and the slider guide of existing safety tongs all are wedge shapes, and slider guide is up big and down small, and slipper is up-small and down-big, they match with the inclined-plane, be provided with ball between slipper and the slider guide, when slipper makes progress slippage along slider guide, laterally draw close until propping up guide rail to guide rail." slipper/slider guide " combination has two groups usually, is distributed in the guide rail both sides.Two slipper move together, just form the clamping to guide rail." limiting block " arranged on the pedestal, be used to limit the make progress stroke of slippage of slipper; The fastening spring of slider guide rear side provides gripping power.Because the stroke of slipper is a limited particular value, causing the deflection of fastening spring and the deflection of spring power (gripping power) of corresponding generation also is a particular value, and the braking force of safety tongs also is a particular value (braking force is the friction force that gripping power produces on guide rail) thus.In actual condition, elevator load changes, often be in unloaded be fully loaded with between, and the braking force of safety tongs is fixed, this just causes the each glancing impact of safety tongs, braking deceleration can not be identical value, also is that existing safety tongs can not remain unique fixed value at the glancing impact braking deceleration.For this reason " elevator manufacturing with install safety standard " to have provided the allowed band of " braking deceleration " be 0.2～1.0g(" g " expression acceleration due to gravity).Also promptly, under the situation of the car free fall that rated load is housed, braking deceleration must be between 0.2～1.0g.The design concept of existing safety tongs and its braking characteristics of structures shape can not be taken into account the requirement to comfort and safety.
Secondly, in the spring manufacturing process, the elasticity modulus of every spring and mechanical dimension are difficult to control more accurately (with respect to the precision of common mechanical cutting), have influence on its consistency of performance, so must debug one by one before the gripping power of each progressive safety gear dispatches from the factory, this is an inevasible operation." elevator manufacturing and installation safety standard " regulation safety tongs must carry out a type test every year, with the quality of supervision safety tongs.
Again secondly, the spring that is adopted in the existing safety tongs relates to polytype (as butterfly spring, spiral spring, U type spring, board-like spring etc.), thereby causes safety tongs variation structural shape, is unfavorable for large-scale production, does not more talk universalization, seriation.The tonnage of elevator is big more, speed is high more, and the size of its safety tongs is also just big more, and spring has wherein occupied very big proportion, and the manufacturing technology difficulty and the cost of large scale spring are the bottlenecks that large-tonnage, high-speed safety tongs are made.
If do not use spring in the safety tongs, just can avoid spring performance to be difficult to precisely control the trouble (product must be adjusted one by one) that this short item is brought, cost-cutting; And spring is need be hot worked, and hot working is the production process of highly energy-consuming, does not use spring, helps energy-conserving and environment-protective.
Summary of the invention
The applicant is at the shortcoming of above-mentioned existing asymptotic expression safety tongs structure and performance characteristics, designed the novel elevator anti-fall device of a cover " brake control lever+connecting rod ", constitute a completely new product, it utilizes lever principle, the weight of gathering car and load thereof is as its braking force source, difference according to gross load produces cooresponding braking force, reach the purpose of " tackling the load that changes " with the braking force that changes, obtain constant braking deceleration, new product has all had essential change with existing product from principle, structure and performance.Not only can improve elevator ride comfort and safety, also can reduce production costs.This new product also is convenient to product seriation and manufacturing scaleization simultaneously, has remarkable economic efficiency.
The technical solution adopted in the present invention is as follows:
A kind of novel elevator anti-fall device is connected with the elevator lifting rod, and support is installed in car bottom, two brake control levers and connecting rod about the support avris is equipped with, and two brake control levers are symmetricly set in elevator T type guide rail both sides; The external side end of brake control lever is provided with chute, cooperates with fixed pin shaft on support by chute; The medial extremity of brake control lever is a friction side, maintains certain interval with the both sides of T type guide rail, and the brake control lever middle part is articulated by gear pin and connecting rod, the symmetry pivot joint left and right sides, connecting rod two ends brake control lever.
It is further characterized in that: described chute is a kind of in closed slotted hole, open type chute or the open type chute.
The brake control lever friction side is active radial type structure, and the friction head front portion is the plane, is connected with brake control lever by jointed shaft.
The brake control lever friction side is connected with brake control lever by fastener for the formula structure of inserting, friction head.
Central single the lifting rod of elevator is connected the connecting rod central part.
Two symmetrical lifting rods of elevator are connected to brake control lever middle part, the left and right sides.
Be positioned at the locating dowel pin that the connecting rod below is provided with support link on the described support, the lower central of described connecting rod is provided with shallow grooves, and under the normal condition, shallow grooves matches with the locating dowel pin that is fixed on support.
Be positioned at brake control lever below, the left and right sides on the described support and be respectively arranged with the locating dowel pin that supports brake control lever.
Beneficial effect of the present invention is as follows:
The present invention has constant braking deceleration, and for the elevator load that changes, thereby the present invention can guarantee constant braking deceleration by corresponding change braking force.
Constant braking deceleration has following advantage:
Braking deceleration is set in certain desirable value, and for example 0.6g can take into account comfort and the safety taken.
Constant braking deceleration makes deceleration distance constant: because elevator speed is constant, therefore make application elevator of the present invention that a definite deceleration distance is all arranged, thereby can provide improved space to the elevator hoistways design, for example reduce requirement, reduce the requirement of energy disperser etc. the well pit degree of depth.
The present invention also has the following advantages:
The present invention is simple and compact for structure, simplified the version of existing " fastening spring+slipper/slider guide " combination greatly, the present invention does not use fastening spring, has avoided existing safety tongs must debug the operation of gripping power one by one before dispatching from the factory, and has saved the manufacturing time cost.Help energy-conserving and environment-protective.
The present invention's's " brake control lever+connecting rod " is simple and compact for structure, brings convenience to organization of production management, product lot quantityization.
The present invention has avoided the possibility of misoperation (braking by mistake), and most existing progressive safety gear products, its moving voussoir upwards slip than being easier to by the guide rail band in case guide rail is run in wiping, produce mistake and brake.Movable parts among the present invention---brake control lever and connecting rod are to be in unsteady installing condition, so in the running process of elevator, wipe the phenomenon of bumping the brake control lever friction side even occur guide rail once in a while, also can not trigger the present invention and produce the mistake braking, improved the functional reliability of product.
Description of drawings
Fig. 1 is a front view of the present invention, the state during the elevator normal operation.
Fig. 2 is the front view of the present invention when elevator brake.
Fig. 3 is the comparison diagram of Fig. 1, Fig. 2.
Fig. 4 is the left view of Fig. 2.
Fig. 5 is an exploded view of the present invention.
Fig. 6 is the brake control lever of active radial type structure.
Fig. 7 is the brake control lever of formula structure of inserting.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
As shown in Figures 1 to 4, right angle rack 2 of the present invention is installed in the car bottom by the top side, and two brake control levers 3 are housed right angle rack 2 avris and connecting rod 6, two brake control levers 3 are symmetrically placed in T type guide rail 7 both sides; The external side end of brake control lever 3 is provided with slotted hole 10, and slotted hole movably articulates with the fixed pin shaft 1 that is located on the right angle rack 2; The medial extremity of brake control lever 3 is a friction side 9, maintains certain interval t with the both sides of T type guide rail 7, and brake control lever 3 middle parts are articulated by gear pin 5 and connecting rod 6; Be connected with lifting rod 8 in the middle of the connecting rod 6, connecting rod 6 two ends symmetry articulates left and right sides brake control lever 3, is provided with the scrobicula arc groove in the bottom of connecting rod 6, and under the normal condition, the scrobicula arc groove matches with the locating dowel pin 4 that is fixed on right angle rack 2.Lifting rod 8 is the elevator self structure with T type guide rail 7, does not belong to the part among the present invention.
Certainly, what match with fixed pin shaft 1 not only can be closed slotted hole 10 among Fig. 1, also can be the open type chute 10-1 among Fig. 6, or the open type chute 10-2 among Fig. 7, equally also can realize purpose of the present invention.
When elevator normally moves, state as shown in Figure 1, brake control lever 3 falls under the effect of gravity with connecting rod 6, and rely on locating dowel pin 4 and fixed pin shaft 1 to support, at this moment, the inboard friction side 9 of brake control lever 3 maintains clearance t with the both sides of T type guide rail 7, and whole device moves with lift car.
When the descending generation of elevator hypervelocity, the velocity limiter action that is triggered upwards lifts lifting rod 8 with respect to car, thereby makes connecting rod 6 upward movements; As shown in Figure 2, because brake control lever 3 is articulated with connecting rod 6, therefore brake control lever 3 is also upwards mentioned by connecting rod 6, do spinning movement round fixed pin shaft 1, because the external side end of brake control lever 3 is a slotted hole 10, therefore allow brake control lever 3 when rotating, produce certain displacement by slotted hole 10 and fixed pin shaft 1 and be stuck avoiding around fixed pin shaft 1; The friction side 9 of brake control lever 3 rotates up and comes in contact and push against guide rail with the both sides of T type guide rail 7; About two brake control levers 3 act on simultaneously, the common clamping that constitutes guide rail 7, thus realize emergency braking to elevator.
Brake control lever 3 is that hinged support constitutes a lever with gear pin 5 among the present invention, and its outer end is a hard point, bears the gross load from elevator, and its inner friction side is implemented clamping for the output force to guide rail; About two brake control levers the gripping power size of guide rail is depended on the scantling of structure and the elevator gross load of brake control lever.Specifically, the slotted hole 10 of brake control lever 3 of the present invention, and friction side 9 between position relation determine, therefore fixed distance between any two, i.e. the arm of force of leverage power is fixed; Under braking mode, the gross load of elevator be evenly distributed on car bottom about on four brake control levers of two cover apparatus of the present invention, make force analysis with brake control lever 3 as member, 10 places are subjected to downward gross load power at brake control lever outer end slotted hole, at this moment, with gear pin 5 as balance pivot, the positive pressure that inwardly (points to guide rail 7) in friction side 9 generation levels as can be known, because the arm of force is fixed, so proportions constant of positive pressure and gross load power, simultaneously owing to the friction coefficient of contact surface between friction side and the guide rail is determined, therefore the friction force that makes progress also is to have definite relation with gross load power, according to Newton's law, i.e. the present invention has definite braking deceleration to the braking of car.
For the elevator of two symmetrical lifting rods about being provided with, can be on brake control lever with the lifting rod direct mount.Equally, also locating dowel pin 4 can be arranged on the brake control lever below plays a supportive role.
Consider the wear problem of brake control lever friction side 9, the brake control lever friction side among the present invention can also be made active radial type structure (as Fig. 6) or the formula structure (as Fig. 7) of inserting, to be convenient for changing the end that is worn; And will select the high-abrasive material different for use with the part of guide rail contact, high-abrasive materials such as copper alloy, partial metallurgy metallic material or pottery for example with brake control lever.As shown in Figure 6, active radial type friction head 12-1 and guide rail contact portion can be made the plane, to enlarge area of contact, increase resistance to abrasion; Active radial type friction head is connected brake control lever 3 medial extremitys by jointed shaft 11.As shown in Figure 7, the insert friction head 12-2 of formula structure is fixed on the medial extremity of brake control lever by fastener.
More than describing is explanation of the invention, is not that institute of the present invention restricted portion is referring to claim to the qualification of invention, and under the situation of spirit of the present invention, the present invention can do any type of modification.
Claims (8)
1. a novel elevator anti-fall device is connected with the elevator lifting rod, it is characterized in that: support is installed in car bottom, two brake control levers and connecting rod about the support avris is equipped with, and two brake control levers are symmetricly set in elevator T type guide rail both sides; The external side end of brake control lever is provided with chute, cooperates with fixed pin shaft on support by chute; The medial extremity of brake control lever is a friction side, maintains certain interval with the both sides of T type guide rail, and the brake control lever middle part is articulated by gear pin and connecting rod, the symmetry pivot joint left and right sides, connecting rod two ends brake control lever.
2. according to the described novel elevator anti-fall device of claim 1, it is characterized in that: described chute is a kind of in closed slotted hole, open type chute or the open type chute.
3. according to the described novel elevator anti-fall device of claim 1, it is characterized in that: the brake control lever friction side is active radial type structure, and the friction head front portion is the plane, is connected with brake control lever by jointed shaft.
4. according to the described novel elevator anti-fall device of claim 1, it is characterized in that: the brake control lever friction side is connected with brake control lever by fastener for the formula structure of inserting, friction head.
5. according to the described novel elevator anti-fall device of claim 1, it is characterized in that: central single the lifting rod of elevator is connected the connecting rod central part.
6. according to the described novel elevator anti-fall device of claim 1, it is characterized in that: two symmetrical lifting rods of elevator are connected to brake control lever middle part, the left and right sides.
7. according to the described novel elevator anti-fall device of claim 1, it is characterized in that: be positioned at the locating dowel pin that the connecting rod below is provided with support link on the described support, the lower central of described connecting rod is provided with shallow grooves, and under the normal condition, shallow grooves matches with the locating dowel pin that is fixed on support.
8. according to the described novel elevator anti-fall device of claim 1, it is characterized in that: be positioned at brake control lever below, the left and right sides on the described support and be respectively arranged with the locating dowel pin that supports brake control lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110170607.0A CN102190231B (en) | 2011-06-23 | 2011-06-23 | Novel elevator falling prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110170607.0A CN102190231B (en) | 2011-06-23 | 2011-06-23 | Novel elevator falling prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102190231A true CN102190231A (en) | 2011-09-21 |
| CN102190231B CN102190231B (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110170607.0A Expired - Fee Related CN102190231B (en) | 2011-06-23 | 2011-06-23 | Novel elevator falling prevention device |
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| Country | Link |
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| CN (1) | CN102190231B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110129A (en) * | 2015-09-14 | 2015-12-02 | 恒达富士电梯有限公司 | Safe elevator rapid and reliable in braking |
| CN106395546A (en) * | 2016-11-29 | 2017-02-15 | 北京联合大学 | Safe anti-falling device |
| WO2019029314A1 (en) * | 2017-08-08 | 2019-02-14 | 无锡市一品电梯配件有限公司 | Safety gear with constant brake deceleration |
| US11059698B2 (en) | 2017-09-22 | 2021-07-13 | Otis Elevator Company | Elevator safety gear assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2437654Y (en) * | 2000-07-16 | 2001-07-04 | 李金山 | Fall protector for material lifter |
| CN2491429Y (en) * | 2001-07-20 | 2002-05-15 | 上海市第八建筑有限公司 | Safety device of spirally supporting brake type material hoister |
| WO2004033354A1 (en) * | 2002-10-09 | 2004-04-22 | Otis Elevator Company | Elevator safety device |
| CN1684896A (en) * | 2002-10-09 | 2005-10-19 | 奥蒂斯电梯公司 | Combined elevator guiding and safety braking device |
| CN202156853U (en) * | 2011-06-23 | 2012-03-07 | 盛嘉勋 | Novel falling protector for elevator |
-
2011
- 2011-06-23 CN CN201110170607.0A patent/CN102190231B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2437654Y (en) * | 2000-07-16 | 2001-07-04 | 李金山 | Fall protector for material lifter |
| CN2491429Y (en) * | 2001-07-20 | 2002-05-15 | 上海市第八建筑有限公司 | Safety device of spirally supporting brake type material hoister |
| WO2004033354A1 (en) * | 2002-10-09 | 2004-04-22 | Otis Elevator Company | Elevator safety device |
| CN1684896A (en) * | 2002-10-09 | 2005-10-19 | 奥蒂斯电梯公司 | Combined elevator guiding and safety braking device |
| CN202156853U (en) * | 2011-06-23 | 2012-03-07 | 盛嘉勋 | Novel falling protector for elevator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110129A (en) * | 2015-09-14 | 2015-12-02 | 恒达富士电梯有限公司 | Safe elevator rapid and reliable in braking |
| CN106395546A (en) * | 2016-11-29 | 2017-02-15 | 北京联合大学 | Safe anti-falling device |
| CN106395546B (en) * | 2016-11-29 | 2019-01-25 | 北京联合大学 | A kind of safety anti-falling device |
| WO2019029314A1 (en) * | 2017-08-08 | 2019-02-14 | 无锡市一品电梯配件有限公司 | Safety gear with constant brake deceleration |
| US11059698B2 (en) | 2017-09-22 | 2021-07-13 | Otis Elevator Company | Elevator safety gear assembly |
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| Publication number | Publication date |
|---|---|
| CN102190231B (en) | 2014-07-16 |
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