CN205099138U - Speed limit protection device - Google Patents
Speed limit protection device Download PDFInfo
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- CN205099138U CN205099138U CN201520533658.9U CN201520533658U CN205099138U CN 205099138 U CN205099138 U CN 205099138U CN 201520533658 U CN201520533658 U CN 201520533658U CN 205099138 U CN205099138 U CN 205099138U
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- brake wheel
- end cap
- speed
- centrifugal
- protective device
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Abstract
The utility model discloses an external friction formula speed limit protection device, its centrifugal speed trigger mechanism set up in the brake drum and immobilization connection on the main shaft, exceed when setting for the speed of action as rotational speed of driving shaft, the pressure that the speed control spring is overcome to the centrifugation piece outwards throws away, the terminal dogtooth meshing with the brake drum inner chamber of the centrifugation piece that throws away drives the brake drum rotation. The brake drum flange that has a friction disc presss from both sides tightly between end cover and brake force adjusting plate, and end cover and brake force adjusting plate are fixed on the mounting panel to apply predetermined pressure, the brake force that rubs and produce braking moment and obtain the invariant through pressure regulating spring during the rotation of the relative end cover of messenger's brake drum to brake force adjusting plate. The utility model discloses a speed limit protection device simple structure, dependable performance, convenient to use to the cost is lower, is fit for being used in narrow and small and reset operation inconvenient, functioning speed the is lower goods of installation space on with construction jacking equipment or the simple and easy type of structure construction jacking equipment.
Description
Technical field
The utility model relates to engineering construction jacking equipment and prevents fall safety from protecting field, specifically, relates to a kind of speed-limiting protective device.
Background technology
Speed-limiting protective device is most important safety device in construction jacking equipment, falls for preventing jacking equipment cage.Gear cone cydariform speed-limiting protective device conventional is at present generally gradual, and it overlaps primarily of gear, gear wheel shaft, housing, centrifugal speed-limit device, cone drum brake wheel, friction, compress video disc spring, composition such as resistance switch block and hold-down nut etc.The gradual speed-limiting protective device of conical drum shaped gear is fixedly connected on cage, and the gear of its gear wheel shaft engages with the tooth bar on the guide rail bracket of construction jacking equipment.The principle of work of the gradual speed-limiting protective device of conical drum shaped gear is: when jacking equipment cage surprisingly drops; the gradual speed-limiting protective device of conical drum shaped gear along with cage accelerate together fall; the rotating speed of gear wheel shaft is more and more faster; when reaching responsiveness, centrifugal speed limiting mechanism just band mantle drum brake wheel and gear wheel shaft together rotates.Now, gear wheel shaft just drives brake wheel to start to rotate.When brake wheel is forced to rotate, the hold-down nut connected by screw thread pair with cone drum brake wheel screw portion just has the trend of following rotation.The circumference limiting hold-down nut due to the resistance switch block connected with hold-down nut is rotated, now hold-down nut can only move axially with the rotation of cone drum brake wheel, thus constantly compression compresses video disc spring, compress video disc spring just for providing the positive pressure continued to increase between the male cone (strobilus masculinus) of friction sleeve and the inner conical surface of housing, produce increasing lock torque, finally make gear wheel shaft stop operating, thus realize the object of the cage braking of unexpected tenesmus.Such safety complex structure, needs manual reset after braking, and resetting improperly may affect stopping distance, and usage space is restricted.
There is following problem in the gradual speed-limiting protective device of conical drum shaped gear of this structure: (1) is structurally having strict demand to stopping distance; under the certain situation of braking continuously when not resetting after stopping distance severe overweight or braking; gradual function can be lost; when occurring that compressing video disc spring is driven plain, also fail the phenomenon of cage braking.As can be seen from above-mentioned principle, once compress that video disc spring is driven plain and cage also continues tenesmus, then can produce great rigid shock, destroy safety or cage structure, weak part and cause serious accident.
(2) carry the construction jacking equipment of above-mentioned speed-limiting protective device after cage falls stop, need manually to carry out reset operation by special tool to speed-limiting protective device, in operating process, also need requirement to specifications to carry out successively.When resetting inaccurate situation if occur in manual operation reseting procedure, the stopping distance that construction jacking equipment cage will be caused next time to fall is too short or long, and this all can affect safe operation and the service life of construction jacking equipment.
(3) part jacking equipment is due to the restriction of structure space, and the space for manual reset is very narrow and small, and even reset operation is very difficult.This uses to the design of jacking equipment and makes troubles.Owing to needing the speed-limiting protective device of manual reset to be arranged on position close to cage top, bring many operations inconvenience to the reset work after speed-limiting protective device braking, the work efficiency greatly reducing equipment repair and maintenance personnel with add overwork amount.
Given this reason, the utility model proposes a kind of structure simple, the speed-limiting protective device that the braking force of dependable performance is constant.
Utility model content
The purpose of this utility model is to provide a kind of speed-limiting protective device; can be used for that installing space is narrow and small and on the construction jacking equipment of the goods that reset operation inconvenient, running velocity is lower construction jacking equipment or simple structure, its structure is simple, dependable performance; easy to use, and cost is lower.
To achieve these goals, the utility model proposes following technical scheme.
A kind of speed-limiting protective device, it includes:
End cap, it is for being fixedly installed to speed-limiting protective device adapter plate, and described end cap has centre hole, and the periphery of described centre hole is provided with the boss outside cylinder that the side to described end cap is protruded;
Brake wheel, it is can relatively be arranged in the described boss outside cylinder of the centre hole periphery of described end cap by rotation mode, the inner chamber side face of described brake wheel is provided with double wedge or groove, and one end periphery of described brake wheel is provided with the brake wheel flange for friction braking, between described brake wheel flange and the contact surface of described end cap, be provided with friction lining;
Hold-down mechanism, it is fixedly installed on described adapter plate and described end cap, and is pressed on described brake wheel flange and applies, towards the positive pressure of described end cap, to make to fit tightly between described brake wheel flange and the contact surface of described end cap to it;
Main shaft, it is rotatably arranged in the described centre hole of described end cap;
Gear, it is fixedly installed to one end of described main shaft, and it engages with jacking equipment guide rail bracket tooth bar in use, makes main shaft run with jacking equipment and rotate;
Centrifugal seat, be received and be arranged in described brake wheel, described centrifugal seat is fixedly connected on described main shaft, and is provided with centrifugal-block can relatively rotate mode in described centrifugal seat; And
Switch triggering mechanism, described switch triggering mechanism comprises the limit switch adapter plate be fixedly installed on described end cap, be fixedly mounted on the limit switch on described limit switch adapter plate, and being fixedly installed on the limit switch trigger board that described brake wheel can rotate with described brake wheel, the trigger head of described limit switch stretches in the groove of described limit switch trigger board.
Optionally, in the technical solution of the utility model, in the circumferential lateral surface that described limit switch trigger board is fixedly installed to described brake wheel or be fixedly installed on the bonnet end face of described system drum.
Optionally, in the technical solution of the utility model, described brake wheel is constructed to cylinder barrel shaped structure, and described double wedge or groove are located at its cylinder bore on the surface.
Optionally, in the technical solution of the utility model, described hold-down mechanism comprises the bolt, thrust regulating spring and the setting nut that to be fixedly installed to by described brake-force control pressing plate on safety adapter plate and described end cap.
Optionally, in the technical solution of the utility model, described bolt is through mounting hole, the mounting hole on described end cap and the mounting hole on described brake-force control pressing plate on described safety adapter plate, described end cap and described brake-force control pressing plate are fixedly installed on described safety adapter plate, and described brake wheel flange is clamped between described end cap and described brake-force control pressing plate.
Optionally, in the technical solution of the utility model, first friction lining and the second friction lining are adhesively fixed on the inside and outside both sides of the described flange of described brake wheel respectively, and described first friction lining contacts with described end cap, and described second friction lining contacts with described brake-force control pressing plate.
Optionally, in the technical solution of the utility model, the multiple centrifugal-blocks described centrifugal seat being provided with or equidistantly distributing around the center of described centrifugal seat, each centrifugal-block is all arranged in described centrifugal seat by rotating shaft.
Optionally, in the technical solution of the utility model, described centrifugal seat corresponds to each centrifugal-block and be provided with stud, one end of described stud is fixed in described centrifugal seat by screw thread, and the other end of described stud to be matched with Spring pad by nut and to be pressed on described centrifugal-block by governing spring.
Centrifugal seat to be arranged in brake wheel and to be fixedly linked on safety main shaft by the technical solution of the utility model, centrifugal-block and governing spring is adopted to respond safety spindle speed, when spindle speed exceedes set action speed, the pressure that centrifugal-block overcomes governing spring outwards throws away, the centrifugal-block end thrown away and the double wedge of brake wheel inner chamber or engagement, thus drive brake wheel to rotate by centrifugal seat.Brake wheel is can relatively be arranged in the boss outside cylinder of the end cap central hole peripheral of safety by rotation mode, its flange with friction lining is clamped between end cap and brake-force control pressing plate, end cap and brake-force control pressing plate are fixed on a mounting board by screw bolt and nut, and thrust regulating spring is set between nut and brake-force control pressing plate constant pressure is applied to brake-force control pressing plate, brake wheel is rubbed when end cap rotates and produces lock torque and obtain constant braking force; Meanwhile, the limit switch trigger board linked with brake wheel drives the trigger head of limit switch to rotate, and makes limit switch action, cuts off the control power supply of jacking equipment.Compared to prior art; speed-limiting protective device structure of the present utility model is simple, and dependable performance is easy to use; and cost is lower, be well suited for being used in that installing space is narrow and small and on the construction jacking equipment of the goods jacking equipment that reset operation inconvenient, running velocity is lower or simple structure.
Accompanying drawing explanation
The section-drawing of the speed-limiting protective device that Fig. 1 provides for foundation the utility model embodiment, shows the speed-limiting protective device structure of analysing and observe in direction along A-A in Fig. 2.
Fig. 2 is the speed-limiting protective device section-drawing analysed and observe along the B-B direction in Fig. 1.
Fig. 3 is the right elevation after the speed-limiting protective device mounting limit switch shown in Fig. 1.
Fig. 4 is the A-A direction cutaway view of the speed-limiting protective device in another embodiment.
Fig. 5 is the right elevation of the speed-limiting protective device shown in Fig. 4.
Element names representated by number designation in accompanying drawing claims to be described as follows.
| 1 | Centrifugal-block | 2 | Rotating shaft | ||
| 3 | Brake wheel | 4 | Stud | ||
| 5 | Spring pad | 6 | Nut | ||
| 7 | Shaft end ring | 8 | Gear | ||
| 9 | End face back-up ring | 10 | Adapter plate | ||
| 11 | End cap | 12 | First friction lining | ||
| 13 | Brake-force control plate | 14 | Second friction lining | ||
| 15 | Disk spring group | 16 | Bolt | ||
| 17 | Bonnet | 18 | Zerk | ||
| 19 | Main shaft | 20 | Centrifugal seat | ||
| 21 | Limit switch | 22 | Governing spring | ||
| 23 | Bearing | 24 | Limit switch adapter plate | ||
| 25 | Limit switch trigger board | 110 | Boss outside cylinder | ||
| 301 | Brake wheel inner chamber double wedge | 302 | Brake wheel flange |
Detailed description of the invention
Detailed description of the invention of the present utility model is described in detail below in conjunction with accompanying drawing.
Easy understand, according to the technical solution of the utility model, is not changing under connotation of the present utility model, and one of ordinary skill in the art can propose the various structures mode that can mutually replace and implementation.Therefore, following detailed description of the invention and accompanying drawing are only the exemplary illustrations to the technical solution of the utility model, and should not be considered as of the present utility model all or the restriction be considered as technical solutions of the utility model or restriction.
Occur that the orientation term such as up, down, left, right, before and after, front, the back side, top, bottom that maybe may occur carries out defining relative to the structure shown in each accompanying drawing in this manual, they are relative concepts, therefore likely can residing for it diverse location, different using state and correspondingly changing.So, also these or other orientation term should be interpreted as restricted term.
Refer to shown in Fig. 1 to Fig. 5, in the embodiment provided according to the technical solution of the utility model, speed-limiting protective device comprises: centrifugal-block 1; rotating shaft 2, brake wheel 3, stud 4; Spring pad 5, nut 6, shaft end ring 7; gear 8, end face back-up ring 9, end cap 11; first friction lining 12, brake-force control pressing plate 13, second friction lining 14; pressure regulating spring 15, bolt 16, bonnet 17; zerk 18; main shaft 19, centrifugal seat 20, limit switch 21; governing spring 22; bearing 23, limit switch adapter plate 24, and limit switch trigger board 25.Described speed-limiting protective device is fixedly installed on adapter plate 10.Below the assembling matching relationship between each element of speed-limiting protective device of the present utility model is described.
Refer to shown in Fig. 1 and Fig. 2, the gear 8 of speed-limiting protective device is fixedly installed to main shaft 19 end by key, and one end of gear 8 uses shaft end ring 7 to carry out axial location.The stage casing part of main shaft 19 is rotatably arranged in the centre hole of end cap 11 by bearing 23.Brake wheel 3 is constructed to cylinder barrel shaped structure, and its cylinder bore surface is provided with protruding double wedge 301.Should be appreciated that based on same functional purpose, also can be designed to groove to replace this projection.One end periphery of brake wheel 3 is provided with brake wheel flange 302, this brake wheel 3 by axis hole set in the middle part of it can relatively be arranged in the boss outside cylinder 110 of the centre hole periphery of end cap 11 by rotation mode.
As the component part of hold-down mechanism, brake-force control pressing plate 13 is pressed on this brake wheel flange 302, thru-bolt 16 is through mounting hole, the mounting hole on end cap 11 and the mounting hole on brake-force control pressing plate 13 on adapter plate 10, end cap 11 and brake-force control pressing plate 13 are fixedly installed on adapter plate 10, and brake wheel flange 302 is clamped between end cap 11 and brake-force control pressing plate 13.First friction lining 12 and the second friction lining 14 are adhesively fixed on the inside and outside both sides of brake wheel flange 302 respectively, and the first friction lining 12 contacts with end cap 11, and the second friction lining 14 contacts with brake-force control pressing plate 13.Thru-bolt 16 is provided with pressure regulating spring 15 near between the nut and brake-force control pressing plate 13 of brake-force control pressing plate 13 one end, have employed disk spring group in the present embodiment, but those skilled in the art's spring that can other be selected as required suitable or spring assembly such as coil spring, leaf spring group etc.Setting nut to the thrust of pressure regulating spring 15, and then on the first friction lining 12 and the second friction lining 14 applied load.Like this, the hold-down mechanism be made up of brake-force control pressing plate 13, bolt 16 and nut and pressure regulating spring 15 applies towards the positive pressure of end cap 11 to brake wheel flange 302, and friction lining is close between the contact surface of brake wheel flange 302 and end cap 11.By regulating the amount of compression of pressure regulating spring 15, the positive pressure acted on brake-force control pressing plate 13 can be changed, thus change the lock torque of brake wheel 3.
Shown in Fig. 1 and Fig. 2, centrifugal seat 20 is received in the inner chamber being arranged on brake wheel 3, and it is fixedly mounted on the other end of main shaft 19 by key, and the end of main shaft 19 is installed in the endoporus of bonnet 17, and main shaft 19 end is provided with zerk 18.In the mounting hole that centrifugal-block 1 is arranged on centrifugal seat 20 by rotating shaft 2 or mounting groove, in one embodiment, centrifugal seat 20 is provided with multiple centrifugal-block 1, each centrifugal-block 1 structure is identical and to be centrosymmetric layout relative to main shaft 19.One end of stud 4 is fixed in centrifugal seat 20 by screw thread, and the other end of stud 4 to be matched with Spring pad 5 by nut 6 and to be pressed on centrifugal-block 1 by governing spring 22.Easy understand, according to the difference of embody rule occasion, also can select other embodiment, such as, only adopt a centrifugal-block, or adopts three, four the equidistant centrifugal-blocks split in the even more center around centrifugal seat.
Refer to Fig. 2 and Fig. 3, limit switch adapter plate 24 is fixedly installed to the inner side of the end cap 11 of safety, limit switch 21 is fixedly mounted on limit switch adapter plate 24, outside the bonnet 17 of brake wheel 3, be bolted the limit switch trigger board 25 of adjustable angle, this limit switch trigger board 25 also can be arranged on the side of brake wheel 3.The trigger head of limit switch 21 stretches in the groove of the limit switch trigger board 25 outside brake wheel 3.Like this, form a switch triggering mechanism linked with brake wheel, so that by speed-limiting protective device emergency cut-off motor circuit under generation abnormal operating condition.
Referring to shown in Fig. 4 and Fig. 5 is the another kind of installation form of limit switch trigger board 25 in another embodiment, and limit switch trigger board is fixedly installed on the end plane of bonnet 17, and the trigger head of limit switch 21 stretches in the groove of limit switch trigger board 25.
The following describes the principle of work of speed-limiting protective device of the present utility model.Speed-limiting protective device is fixedly mounted on adapter plate 10, and gear 8 engages with jacking equipment guide rail bracket tooth bar, runs and rotate with jacking equipment.In jacking equipment normal course of operation, gear 8 drives main shaft 19 to rotate, and main shaft 19 drives the centrifugal seat 20 be fixedly connected with it by key to rotate.Under the effect of pressure regulating spring 15 pressure, the first friction lining 12 on the flange 302 of brake wheel 3 and the second friction lining 14 are close to end cap 11 and brake-force control pressing plate 13 respectively, make brake wheel 3 keep maintaining static.
When jacking equipment running velocity reaches triggering speed, centrifugal-block 1 overcomes the pressure of governing spring 22 and 2 rotates around the shaft under centrifugal action, its terminal part radially throw away until with the double wedge 301(of brake wheel 3 inner chamber or groove) conflict and engage.Now main shaft 19 is still followed jacking equipment and is fallen and rotate, therefore the centrifugal seat 20 be fixedly connected on main shaft 19 by key is still followed main shaft 19 and is rotated together, due to centrifugal-block 1 and double wedge 301(or groove) between locking, brake wheel 3 is centrifuged seat 20 and drives and play rotation with one.So between first friction lining 12 and end cap 11 of brake wheel flange 302 and produce relative rotation between the second friction lining 14 and brake-force control pressing plate 13, under the effect of pressure regulating spring 15 positive pressure, friction produces lock torque.This lock torque overcomes construction jacking equipment and acts on moment on gear 8 when falling, and makes construction jacking equipment produce deceleration/decel until stop.The amount of compression that the size of this lock torque can change pressure regulating spring 15 by setting nut regulates.
Further; speed-limiting protective device of the present utility model includes switch triggering mechanism as shown in Figures 2 to 5 in one embodiment; in construction jacking equipment normal course of operation; be fixed on that limit switch trigger board 25 on the outside of brake wheel 3 or bonnet end face is the same with brake wheel 3 to be kept maintaining static dynamic, therefore do not relatively rotate between this limit switch trigger board 25 and the limit switch 21 be fixed on limit switch adapter plate 24 and trigger head thereof.When safety is braked, as previously described, brake wheel 3 is centrifuged seat 20 and drives and play rotation with one, thus the limit switch trigger board 25 be fixed on the outside of brake wheel 3 or bonnet end face is also rotated thereupon together, like this, limit switch trigger board 25 drives the trigger head of limit switch to rotate, and makes limit switch action, cuts off the control power supply of jacking equipment.After getting rid of construction jacking equipment fault, construction jacking equipment is upwards started the braking mode conveniently can removing safety, finally adjusts the angle of the limit switch trigger board 25 on brake wheel 3, limit switch 21 is connected, thus normally can run jacking equipment.
As mentioned above, the technical solution of the utility model adopts and centrifugal seat to be arranged in brake wheel and to be fixedly linked in the mode of main shaft, safety spindle speed is responded by centrifugal-block and governing spring, when spindle speed exceedes set action speed, the pressure that centrifugal-block overcomes governing spring outwards throws away, the double wedge (or groove) of the centrifugal-block terminal part engaging-in brake wheel inner chamber side thrown away, thus drive brake wheel to rotate by centrifugal seat.Brake wheel is can relatively be arranged in the boss outside cylinder of the end cap central hole peripheral of safety by rotation mode, brake wheel flange with friction lining is clamped between end cap and brake-force control pressing plate, end cap and brake-force control pressing plate are fixed on a mounting board by screw bolt and nut, and between nut and brake-force control pressing plate, be provided with pressure regulating spring, pressure regulating spring applies constant pressure to brake-force control pressing plate, makes brake wheel obtain constant braking force.Setting nut, to the thrust of pressure regulating spring, can regulate the braking force of safety, and the limit switch trigger board simultaneously linked with brake wheel drives the trigger head of limit switch to rotate, and makes limit switch action, cuts off the control power supply of jacking equipment.Compared to prior art; speed-limiting protective device structure of the present utility model is simple, and dependable performance is easy to use; and cost is lower, be well suited for being used in that installing space is narrow and small and on the construction jacking equipment of the goods that reset operation inconvenient, running velocity is lower construction jacking equipment or simple structure.
The technical solution of the utility model is not limited to the detailed description of the invention in above-mentioned explanation; those skilled in the art can under the prerequisite not departing from the utility model technological thought; various deformation and amendment are carried out to above-described embodiment, and these distortion and amendment all should be worked as and belonged in protection domain of the present utility model.
Claims (8)
1. a speed-limiting protective device, is characterized in that, includes:
End cap, it is for being fixedly installed to speed-limiting protective device adapter plate, and described end cap has centre hole, and the periphery of described centre hole is provided with the boss outside cylinder that the side to described end cap is protruded;
Brake wheel, it is can relatively be arranged in the described boss outside cylinder of the centre hole periphery of described end cap by rotation mode, the inner chamber side face of described brake wheel is provided with double wedge or groove, and one end periphery of described brake wheel is provided with the brake wheel flange for friction braking, between described brake wheel flange and the contact surface of described end cap, be provided with friction lining;
Hold-down mechanism, it is fixedly installed on described adapter plate and described end cap, and is pressed on described brake wheel flange and applies, towards the positive pressure of described end cap, to make to fit tightly between described brake wheel flange and the contact surface of described end cap to it;
Main shaft, it is rotatably arranged in the described centre hole of described end cap;
Gear, it is fixedly installed to one end of described main shaft, and it engages with jacking equipment guide rail bracket tooth bar in use, makes main shaft run with jacking equipment and rotate;
Centrifugal seat, be received and be arranged in described brake wheel, described centrifugal seat is fixedly connected on described main shaft, and is provided with centrifugal-block can relatively rotate mode in described centrifugal seat; And
Switch triggering mechanism, described switch triggering mechanism comprises the limit switch adapter plate be fixedly installed on described end cap, be fixedly mounted on the limit switch on described limit switch adapter plate, and being fixedly installed on the limit switch trigger board that described brake wheel can rotate with described brake wheel, the trigger head of described limit switch stretches in the groove of described limit switch trigger board.
2. speed-limiting protective device according to claim 1, is characterized in that, in the circumferential lateral surface that described limit switch trigger board is fixedly installed to described brake wheel or be fixedly installed on the bonnet end face of described brake wheel.
3. speed-limiting protective device according to claim 1, is characterized in that, described brake wheel is constructed to cylinder barrel shaped structure, and described double wedge or groove are located at its cylinder bore on the surface.
4. speed-limiting protective device according to claim 1, is characterized in that, described hold-down mechanism comprises the bolt, thrust regulating spring and the setting nut that to be fixedly installed to by described brake-force control pressing plate on safety adapter plate and described end cap.
5. speed-limiting protective device according to claim 4; it is characterized in that; described bolt is through mounting hole, the mounting hole on described end cap and the mounting hole on described brake-force control pressing plate on described safety adapter plate; described end cap and described brake-force control pressing plate are fixedly installed on described safety adapter plate, and described brake wheel flange is clamped between described end cap and described brake-force control pressing plate.
6. speed-limiting protective device according to claim 5; it is characterized in that; first friction lining and the second friction lining are adhesively fixed on the inside and outside both sides of the described flange of described brake wheel respectively; described first friction lining contacts with described end cap, and described second friction lining contacts with described brake-force control pressing plate.
7. speed-limiting protective device according to claim 1, is characterized in that, the multiple centrifugal-blocks described centrifugal seat being provided with or equidistantly distributing around the center of described centrifugal seat, each centrifugal-block is all arranged in described centrifugal seat by rotating shaft.
8. speed-limiting protective device according to claim 7; it is characterized in that; described centrifugal seat corresponds to each centrifugal-block and be provided with stud; one end of described stud is fixed in described centrifugal seat by screw thread, and the other end of described stud to be matched with Spring pad by nut and to be pressed on described centrifugal-block by governing spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533658.9U CN205099138U (en) | 2015-07-22 | 2015-07-22 | Speed limit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533658.9U CN205099138U (en) | 2015-07-22 | 2015-07-22 | Speed limit protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205099138U true CN205099138U (en) | 2016-03-23 |
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ID=55514933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520533658.9U Active CN205099138U (en) | 2015-07-22 | 2015-07-22 | Speed limit protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205099138U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365013A (en) * | 2015-07-22 | 2017-02-01 | 上海市建筑科学研究院科技发展有限公司 | External friction type speed limit protection device |
| US11598382B2 (en) | 2019-07-12 | 2023-03-07 | Pella Corporation | Adaptive centrifugal brake assemblies |
-
2015
- 2015-07-22 CN CN201520533658.9U patent/CN205099138U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365013A (en) * | 2015-07-22 | 2017-02-01 | 上海市建筑科学研究院科技发展有限公司 | External friction type speed limit protection device |
| CN106365013B (en) * | 2015-07-22 | 2019-03-01 | 上海市建筑科学研究院科技发展有限公司 | Rub external speed-limiting protective device |
| US11598382B2 (en) | 2019-07-12 | 2023-03-07 | Pella Corporation | Adaptive centrifugal brake assemblies |
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