CN205294540U - Speed limit protection device - Google Patents
Speed limit protection device Download PDFInfo
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- CN205294540U CN205294540U CN201520533225.3U CN201520533225U CN205294540U CN 205294540 U CN205294540 U CN 205294540U CN 201520533225 U CN201520533225 U CN 201520533225U CN 205294540 U CN205294540 U CN 205294540U
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Abstract
The utility model discloses a speed limit protection device, its disc brake comprises dynamic formula friction disk and fixed pattern friction disk to apply the packing force that to adjust through the spring between fixed pattern friction disk and dynamic formula friction disk, make disc brake obtain invariable braking torque. When the jacking equipment overspeed and when reaching speed limit protection device and triggering speed, centrifugation piece among the speed limit protection device receives centrifugal force to throw away back and the inboard braking muscle of casing or breaker slot contact and card to end, make the stall of centrifugation seat, with the also stall of fixed pattern friction disk of centrifugation seat hookup. The dynamic formula friction disk produces for the fixed pattern friction disk and rotates and the acquisition braking torque, and detent gear passes through the speed limit protection device main shaft and is connected production brake force with the dynamic friction dish, and the jacking equipment of will being under construction slows down and the system is stopped.
Description
Technical field
The fall safety that prevents that the utility model relates to engineering construction jacking equipment protects field, specifically, it relates to a kind of speed-limiting protective device.
Background technology
Speed-limiting protective device is security device the most important in construction jacking equipment, hangs cage for preventing jacking equipment and falls. Conical drum shaped gear shape speed-limiting protective device conventional at present is generally gradual speed-limiting protective device, and it overlaps primarily of gear, gear shaft, housing, centrifugal speed limiting mechanism, cone drum brake wheel, friction, compress video disc spring, the resistance composition such as switch block and hold-down nut. The gradual speed-limiting protective device of conical drum shaped gear is fixedly connected and is hanging on cage, and the gear of its gear shaft engages with the tooth bar on the guide rail frame of construction jacking equipment. The principle of work of the gradual speed-limiting protective device of conical drum shaped gear is: surprisingly drop when jacking equipment hangs cage; the gradual speed-limiting protective device of conical drum shaped gear accelerates to fall along with hanging cage together; the rotating speed of gear shaft is more and more faster; when reaching action speed, centrifugal speed limiting mechanism just drives cone drum brake wheel and gear shaft together to rotate. Now, gear 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 following rotation. Resistance switch block owing to connecting with hold-down nut limits the circumference rotation of hold-down nut, 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, between the outer conical surface of friction cover and the inner conical surface of housing, the positive pressure continued to increase, produce increasing braking moment, finally make gear shaft stop rotating, thus realize the object hanging cage braking of unexpected tenesmus.
There is following problem in this kind of traditional speed-limiting protective device: stopping distance is structurally had strict demand by (1); when braking continuously when not resetting after stopping distance severe overweight or braking; gradual function can be lost; produce great rigid shock; destroy speed-limiting protective device or cage structure, cause serious accident.
(2) jacking equipment of constructing falls after stop hanging cage, it is necessary to manually by special tool, speed-limiting protective device is carried out reset operation. If when occurring to reset inaccurate situation in manual operation process, it is too short or excessively long that the jacking equipment that will cause constructing hangs the stopping distance that cage falls next time, and this all can affect safe operation and the work-ing life of construction jacking equipment.
(3) part jacking equipment is due to the restriction in structure space, very narrow and small for the space manually resetted, and even reset operation is very difficult. This uses to the design of jacking equipment and makes troubles. In view of above problem, for meeting the need of market, the utility model proposes a kind of structure simple, the speed-limiting protective device that the damping force of dependable performance is constant.
Practical novel content
The purpose of this utility model is the speed-limiting protective device providing a kind of damping force constant; can be used for narrow space is installed on the construction jacking equipment of jacking equipment or simple structure and reset operation inconvenience, the lower goods of travelling speed are constructed; its structure is simple; dependable performance; easy to use, and cost is lower.
In order to realize above-mentioned purpose, the utility model proposes following technical scheme.
The speed-limiting protective device that damping force is constant, comprising:
End cap, described end cap has centre hole, and the periphery of described centre hole is provided with the boss outside cylinder protruded to the side of end cap;
Housing, itself and described end cap are fixedly assembled and are fixedly installed on speed-limiting protective device mounting plate, and described housing inner peripheral surface is provided with protruding braking muscle or the breaker slot of depression;
Main shaft, in its centre hole being rotatably arranged on described end cap;
Gear, it is fixedly installed to one end of described main shaft, and it engages with jacking equipment guide rail frame tooth bar in use so that described main shaft runs and synchronous rotary with jacking equipment;
Centrifugal speed limiting mechanism, it is arranged in described housing, it comprises with can rotation mode is arranged in the described boss outside cylinder of the centre hole periphery of described end cap relatively centrifugal seat, so that centrifugal piece and governing spring that mode is arranged in described centrifugal seat can be relatively rotated, and the dynamic formula friction disc being fixedly installed on described main shaft and rotating with it, adjust spring by damping force between described dynamic formula friction disc and the end face of described centrifugal seat and apply pressure and make the two be in close contact; And
Switch triggering mechanism, it is constructed to rotate with described centrifugal speed limiting mechanism and stops moving axially along described main shaft when rotating in described centrifugal seat, and then triggers the limit switch being arranged on described main shaft rear with emergency switching-off motor circuit.
Optionally, in the technical solution of the utility model, described centrifugal speed limiting mechanism includes fixed pattern friction disc, and described fixed pattern friction disc is fixedly connected by screw and described centrifugal seat, and is provided with friction plate between described fixed pattern friction disc and described dynamic formula friction disc.
Optionally, in the technical solution of the utility model, described dynamic formula friction disc is arranged between described fixed pattern friction disc and the end face of described centrifugal seat, and described damping force adjustment spring is fixed on the outside of described fixed pattern friction disc, and described fixed pattern friction disc is applied pre-pressure.
Optionally, in the technical solution of the utility model, described centrifugal speed limiting mechanism includes the multiple dynamic formula friction disc being fixedly connected respectively by key and described main shaft, and by multiple fixed pattern friction discs that screw and described centrifugal seat are fixedly connected, the alternately configuration of described multiple dynamic formula friction disc and fixed pattern friction disc, and described damping force adjustment spring is fixed on away from, on the outer side of the outermost fixed pattern friction disc of described centrifugal seat, described outermost fixed pattern friction disc directly being applied pressure.
Optionally, in the technical solution of the utility model, between described multiple dynamic formula friction disc and fixed pattern friction disc, it is provided with friction plate.
Optionally, in the technical solution of the utility model, described centrifugal speed limiting mechanism includes one centrifugal piece, and this centrifugal piece is arranged in described centrifugal seat by rotating shaft; Or and, described centrifugal speed limiting mechanism includes centrifugal piece of multiple center disposed at equal distance around described centrifugal seat, and each centrifugal piece is all arranged in described centrifugal seat by rotating shaft.
Optionally, in the technical solution of the utility model, described centrifugal speed limiting mechanism includes stud, governing spring and Spring pad, one end of described stud is fixed in described centrifugal seat, and described governing spring is pressed on described centrifugal piece by the other end of described stud by nut and described Spring pad.
Optionally, in the technical solution of the utility model, described switch triggering mechanism comprises screw, block, resistance switch block and limit switch, and wherein said block is fixed in described away from the outermost fixed pattern friction disc of this centrifugal seat, and it offers grooved hole; Described resistance switch block one end is connected on described screw, and the other end is then through the groove hole of described block; Described screw one end is arranged on described main shaft end by screw thread, and the extension of its other end is close to described limit switch.
Optionally, in the technical solution of the utility model, described switch triggering mechanism includes and the nut that described screw matches, and described resistance switch block is carried out axial location by described nut on described screw, by regulating the axial location of described resistance switch block that the position of described nut regulates.
Optionally, in the technical solution of the utility model, described limit switch is fixedly installed on limit switch mounting plate, and described limit switch mounting plate is fixed on the bonnet of described housing, and described screw extends through the hole at this bonnet center and is close to described limit switch.
The technical solution of the utility model adopts the disc brake being made up of dynamic formula friction disc and fixed pattern friction disc, and adjusts spring by damping force and apply constant pressure on disc brake so that disc brake obtains constant moment of torsion. When jacking equipment normally runs, fixed pattern friction disc rotates together with slave type friction disc under the effect of frictional force. Run stall once jacking equipment and reach speed-limiting protective device and trigger speed; centrifugal piece of triggering in speed-limiting protective device; centrifugal piece by centrifugal force throw away after contact and engage with the braking muscle of housing inner bulge or the breaker slot of depression; centrifugal seat stops rotating, and the fixed pattern friction disc connected with centrifugal seat also stops rotating. Dynamic formula friction disc and fixed pattern friction disc relatively rotate, and friction disc produces friction brake force square. Like this, provide constant braking moment by disc brake thus will construct jacking equipment slow down and stop. Meanwhile, the limit switch being arranged on main shaft rear is triggered thus emergency switching-off motor circuit by switch triggering mechanism. Compared to prior art; speed-limiting protective device structure of the present utility model is simple, dependable performance, it may also be useful to convenient; and cost is lower, it is well suited for being used on the construction jacking equipment of install narrow space and reset operation inconvenience, goods that travelling speed is lower are constructed jacking equipment or simple structure.
Accompanying drawing explanation
Fig. 1 is the sectional view of the speed-limiting protective device according to the utility model embodiment offer, shows the speed-limiting protective device structure that A-A analyses and observe in direction along Fig. 2.
Fig. 2 is the speed-limiting protective device sectional view analysed and observe along the B-B direction in Fig. 1.
Fig. 3 is the sectional view after the speed-limiting protective device shown in Fig. 1 installs limit switch.
Fig. 4 is the speed-limiting protective device view that C-C analyses and observe in direction along Fig. 3.
Fig. 5 is the speed-limiting protective device view that D-D analyses and observe in direction along Fig. 3.
The element names representated by digital label in accompanying drawing claims to be described as follows.
| 1 | First shaft block ring | 2 | Gear | ||
| 3 | Key | 4 | Sealing end cap | ||
| 5 | Felt | 6 | First hole back-up ring | ||
| 7 | First bearing | 8 | Axle sleeve | ||
| 9 | 2nd bearing | 10 | 2nd hole back-up ring | ||
| 11 | First friction plate | 12 | First dynamic formula friction disc | ||
| 13 | 2nd friction plate | 14 | Block | ||
| 15 | Limit switch | 16 | Limit switch mounting plate | ||
| 17 | First screw | 18 | First nut | ||
| 19 | Resistance switch block | 20 | 2nd screw | ||
| 21 | Damping force adjustment spring | 22 | First fixed pattern friction disc | ||
| 23 | Centrifugal seat | 24 | Centrifugal piece | ||
| 25 | 3rd bearing | 26 | Rotating shaft | ||
| 27 | Housing | 28 | 3rd screw | ||
| 29 | 2nd nut | 30 | Stud | ||
| 31 | Governing spring | 32 | Spring pad | ||
| 33 | 2nd shaft block ring | 34 | 3rd shaft block ring | ||
| 35 | Mounting plate | 36 | Main shaft | ||
| 37 | End cap | 38 | Bonnet | ||
| 39 | 2nd fixed pattern friction dish | 40 | 2nd dynamic formula friction dish |
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
It should be readily understood that according to the technical solution of the utility model, do not changing under connotation of the present utility model, one of ordinary skill in the art can propose the various structures mode that can mutually replace and implementation. Therefore, following embodiment 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 be considered as the restriction to technical solutions of the utility model or restriction.
Occur that the orientation terms such as the up, down, left, right, before and after that maybe may occur, front, the back side, top, bottom carry out defining relative to the structure shown in each accompanying drawing in this manual, they are relative concepts, it is therefore possible to can residing for it different positions, different using state and correspondingly change. So, also these or other orientation term should be interpreted as restricted term.
Refer to shown in Fig. 1 to Fig. 5, in the specific embodiment provided according to the technical solution of the utility model, speed-limiting protective device comprises: the first shaft block ring 1, gear 2, key 3, sealing end cap 4, the felt 5 of sealing, first hole back-up ring 6, first bearing 7, axle sleeve 8, 2nd bearing 9, 2nd hole back-up ring 10, first friction plate 11, first dynamic formula friction disc 12, 2nd friction plate 13, block 14, limit switch 15, limit switch mounting plate 16, first screw 17, first nut 18, resistance switch block 19, 2nd screw 20, dish spring 21, first fixed pattern friction disc 22, centrifugal seat 23, centrifugal piece 24, 3rd bearing 25, rotating shaft 26, housing 27, 3rd screw 28, 2nd nut 29, stud 30, governing spring 31, Spring pad 32, 2nd shaft block ring 33, 3rd shaft block ring 34, speed-limiting protective device main shaft 36, end cap 37, bonnet 38, 2nd fixed pattern friction disc 39, 2nd dynamic formula friction disc 40. described speed-limiting protective device is fixedly installed on speed-limiting protective device mounting plate 35. hereinafter 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; the braking gear 2 of speed-limiting protective device is fixedly installed to main shaft 36 one end by key; one end of gear 2 uses the first shaft block ring 1 to carry out axial location, sealing end cap 4 is housed outside end cap 37, arranges felt 5 to play sealing effect between sealing end cap 4 and main shaft 36. 3rd screw 28 passes through open holes set on the flange of housing 27 and end cap 37, is fixed on speed-limiting protective device mounting plate 35 by described speed-limiting protective device. Main shaft 36 is rotatably arranged in the centre hole of end cap 37 by the first bearing 7 and the 2nd bearing 9. Centrifugal seat 23 is rotatably arranged on by the 3rd bearing 25 in the boss outside cylinder 371 of the centre hole periphery of end cap 37, and centrifugal piece 24 is arranged in the open holes of centrifugal seat 23 by rotating shaft 26. The other end of main shaft 36 is connect by key with the first dynamic formula friction disc 12 and the 2nd dynamic formula friction disc 40 so that the first dynamic formula friction disc 12 and the 2nd dynamic formula friction disc 40 are fixed on main shaft 36, it is possible to rotate with main shaft 36. The two sides of the first dynamic formula friction disc 12 are fixed with the first friction plate 11 and the 2nd friction plate 13 respectively; Equally, the two sides of the 2nd dynamic formula friction disc 40 are also fixed with the identical friction plate of two panels respectively. First fixed pattern friction disc 22 is close on the left of the first dynamic formula friction disc 12 and on the right side of the 2nd dynamic formula friction disc 40, is close on the right side of the first dynamic formula friction disc 12 on the left of the 2nd fixed pattern friction disc 39. By the 2nd screw 20, first fixed pattern friction disc 22 and the 2nd fixed pattern friction disc 39 are fixedly connected with centrifugal seat 23 simultaneously. It is close on the left of dynamic formula friction disc 40 with the 2nd on the right side of centrifugal seat 23. Dish spring 21 it is serially connected with between 2nd screw 20 and the 2nd fixed pattern friction disc 39. Like this, first and second dynamic formula friction disc 12,40 and first and second fixed pattern friction disc 22,39 and dish spring 21 are fixedly installed in centrifugal seat 23 by the 2nd screw 20, constitute a disc brake, and with centrifugal seat 23, jointly form a centrifugal speed limiting mechanism for centrifugal piece 24. The positive pressure acting on disc brake can be changed by the draught of regulating spring 21, thus change the braking moment of disc brake.
Above-mentioned enforcement mode have employed the disc-like brake structure of two dynamic formula friction discs and two fixed pattern friction discs alternately configuration, easy to understand, difference according to embody rule occasion, other configuration scheme can also be selected, such as: only adopt a dynamic formula friction disc, adjusting spring by damping force makes itself and centrifugal seat end face be in close contact its applying pressure, forms an easy disc brake; Or adopt three or three mutually to replace, with upper dynamic friction disc and three or three, the structures configured with unchanging up friction disc, damping force adjusts spring to be fixed on the outer side of outermost fixed pattern friction disc, it is applied pressure make to be in close contact between formula friction disc and fixed pattern friction disc, form the disc brake of a relative complex. In addition, above-mentioned enforcement mode have employed dish spring 21, but those skilled in the art's spring that other can be selected as required suitable or spring assembly such as whisker, leaf spring group etc.
Refer to shown in Fig. 2; speed-limiting protective device in the utility model embodiment includes two centrifugal piece 24; it is arranged in centrifugal seat 23 by rotating shaft 26 respectively, and two centrifugal block assemblies are identical and are centrosymmetric layout relative to speed-limiting protective device main shaft 36. One end of stud 30 is by being screwed in centrifugal seat 23, and the other end of stud 30 uses the 2nd nut 29 to be pressed on centrifugal piece 24 by governing spring 31 with Spring pad 32. Rotating shaft 26 is axially fixing by the 2nd shaft block ring 33. It should be readily understood that according to the difference of embody rule occasion, it is also possible to select other enforcement mode, such as, only adopt one centrifugal piece, or adopt three, four equidistant centrifugal pieces split in the even more center around centrifugal seat.
Refer to Fig. 3, Fig. 4 and Fig. 5, utilize the 3rd shaft block ring 34 to be axially fixed on main shaft 36 by disc brake. Block 14 is fixed on the 2nd fixed pattern friction disc 39. One end of first screw 17 is arranged on main shaft 36 end by screw thread, and resistance switch block 19 one end is passed by the first screw 17, and the other end is then through the groove hole of block 14. Utilize the first nut 18 will hinder switch block 19 axial location on the first screw 17, regulate the position of the first nut 18 and the axial location of adjustable resistance switch block 19. Limit switch 15 is fixedly installed on limit switch mounting plate 16, and limit switch mounting plate 16 is fixed on bonnet 38. The other end of the first screw 17 extends through the hole at bonnet 38 center and is close to described limit switch 15. Like this, form a switch triggering mechanism, to occur under stall running condition by speed-limiting protective device emergency switching-off motor circuit.
The following describes the principle of work of speed-limiting protective device of the present utility model. Speed-limiting protective device is fixed on speed-limiting protective device mounting plate 35 by the 3rd screw 28 such that it is able to follows jacking equipment and runs. Gear 2 engages with jacking equipment guide rail frame tooth bar, runs with jacking equipment and rotates. In jacking equipment normal course of operation, gear 2 drives main shaft 36 to rotate, and main shaft 36 drives the first dynamic formula friction disc 12 connected with it by key and the 2nd dynamic formula friction disc 40 to rotate. First fixed pattern friction disc 22 and the 2nd fixed pattern friction disc 39 are fixed in centrifugal seat 23 by the 2nd screw 20 through spring 21. Under dish spring 21 pressure effect, the 2nd fixed pattern friction disc 39 and the first fixed pattern friction disc 22 are close to dynamic formula friction disc 12 both sides, are close to centrifugal seat 23 right lateral surface on the left of the 2nd dynamic formula friction disc 40. Under the effect of frictional force, the first dynamic formula friction disc 12 and the 2nd dynamic formula friction disc 40 drive the first fixed pattern friction disc 22 and the 2nd fixed pattern friction disc 39 and centrifugal seat 23 together to rotate.
When jacking equipment travelling speed reaches speed-limiting protective device triggering speed; under centrifugal action, overcome the pressure of governing spring 31 for centrifugal piece 24 and 26 rotate around the shaft, until the breaker slot of the braking muscle 271(of its outer end with housing 27 inner bulge or depression) contact and engage. Owing to housing 27 is fixed on mounting plate 35 by the 3rd screw 28, fixing and can not rotate, therefore centrifugal seat 23 correspondingly stopped rotation. The the first fixed pattern friction disc 22 being fixedly connected in centrifugal seat 23 by the 2nd screw 20 is same with the 2nd fixed pattern friction disc 39 also along with centrifugal seat 23 stops rotating together. But, still follow jacking equipment due to main shaft 36 and fall and rotate, the first dynamic formula friction disc 12 formula friction disc 40 dynamic with the 2nd being therefore fixedly connected on main shaft 36 by key still follow main shaft 36 together with rotate. So between first and second dynamic formula friction disc 12,40 and first and second fixed pattern friction disc 22,39, and dynamic producing relative rotation between formula friction disc 40 and the end face of centrifugal seat 23 the 2nd, under the effect of spring 21 positive pressure, friction produces braking moment. This braking moment overcomes construction jacking equipment and acts on the moment on gear 2 when falling so that construction jacking equipment produces retarded velocity until stop. The size of this braking moment can regulate by changing the draught of spring 21.
Further; in an embodiment, speed-limiting protective device of the present utility model includes switch triggering mechanism as shown in Figure 3; in construction jacking equipment normal course of operation; the block 14 being fixed on the 2nd fixed pattern friction disc 39 is followed main shaft 36 and is rotated together; also follow main shaft 36 by thread connection at the first screw 17 of main shaft 36 end to rotate together; and same, resistance switch block 19 is also followed main shaft 36 under the first screw 17 drives and is rotated together. Now do not relatively rotate between block 14, first screw 17 and resistance switch block 19 three. When speed-limiting protective device is braked, as previously described, the 2nd fixed pattern friction disc 39 and block 14 fixed thereon stop rotating. First screw 17, due to the barrier effect of the resistance switch block 19 in the groove being subject to insertion block 14, also stops rotating. And now main shaft 36 is still in rotation, owing to passing through thread connection between main shaft 36 and the first screw 17, under threaded function, the first screw 17 relative main 36 produces axial displacement. When this axial displacement reaches to a certain degree, the end of the first screw 17 triggers the limit switch 15 being arranged on bonnet 38. Limit switch 15 cuts off the motor running circuit of construction jacking equipment, makes jacking equipment out of service. In construction jacking equipment stop and after fixing a breakdown, open bonnet 38 and unscrew the first nut 18, the first screw 17 is reverted to starting position, then the first nut 18 is tightened fixing, and then bonnet 38 is reinstalled. The axial displacement stroke of the first screw 17 can be controlled by the length of its screw thread.
As mentioned above, it is necessary, adopt the disc brake being made up of dynamic formula friction disc and fixed pattern friction disc, and adjust spring by damping force on disc brake, apply constant pressure so that disc brake obtains constant moment of torsion. When jacking equipment normally runs, fixed pattern friction disc rotates together with slave type friction disc under the effect of frictional force. Run stall once jacking equipment and reach speed-limiting protective device and trigger speed; centrifugal piece of triggering in speed-limiting protective device; centrifugal piece by centrifugal force throw away after contact and engage with the braking muscle of housing inner bulge or the breaker slot of depression; centrifugal seat stops rotating, and the fixed pattern friction disc connected with centrifugal seat also stops rotating. Dynamic formula friction disc and fixed pattern friction disc relatively rotate, and friction disc produces friction brake force square. Meanwhile, the limit switch being arranged on main shaft rear is triggered thus emergency switching-off motor circuit by switch triggering mechanism. Like this, provide constant braking moment by disc brake thus will construct jacking equipment slow down and stop. Compared to prior art; speed-limiting protective device structure of the present utility model is simple, dependable performance, it may also be useful to convenient; and cost is lower, it is well suited for being used on the construction jacking equipment of install narrow space and reset operation inconvenience, goods that travelling speed is lower are constructed jacking equipment or simple structure.
The embodiment that the technical solution of the utility model is not limited in above-mentioned explanation; those skilled in the art can under the prerequisite not departing from the utility model technological thought; above-described embodiment is carried out various deformation and amendment, and these distortion and amendment all should be worked as and belonged in protection domain of the present utility model.
Claims (11)
1. a speed-limiting protective device, it is characterised in that, comprising:
End cap, described end cap has centre hole, and the periphery of described centre hole is provided with the boss outside cylinder protruded to the side of end cap;
Housing, itself and described end cap are fixedly assembled and are fixedly installed on speed-limiting protective device mounting plate, and described housing inner peripheral surface is provided with protruding braking muscle or the breaker slot of depression;
Main shaft, in its centre hole being rotatably arranged on described end cap;
Gear, it is fixedly installed to one end of described main shaft, and it engages with jacking equipment guide rail frame tooth bar in use so that described main shaft runs and synchronous rotary with jacking equipment;
Centrifugal speed limiting mechanism, it is arranged in described housing, it comprises with can rotation mode is arranged in the described boss outside cylinder of the centre hole periphery of described end cap relatively centrifugal seat, so that centrifugal piece and governing spring that mode is arranged in described centrifugal seat can be relatively rotated, and the dynamic formula friction disc being fixedly installed on described main shaft and rotating with it, adjust spring by damping force between described dynamic formula friction disc and the end face of described centrifugal seat and apply pressure and make the two be in close contact; And
Switch triggering mechanism, it is constructed to rotate with described centrifugal speed limiting mechanism and stops moving axially along described main shaft when rotating in described centrifugal seat, and then triggers the switch being arranged on described main shaft rear with emergency switching-off motor circuit.
2. speed-limiting protective device according to claim 1; it is characterized in that; described centrifugal speed limiting mechanism includes fixed pattern friction disc; described fixed pattern friction disc is fixedly connected by screw and described centrifugal seat, and is provided with friction plate between described fixed pattern friction disc and described dynamic formula friction disc.
3. speed-limiting protective device according to claim 2; it is characterized in that; described dynamic formula friction disc is arranged between described fixed pattern friction disc and the end face of described centrifugal seat; and described damping force adjustment spring is fixed on the outside of described fixed pattern friction disc, and described fixed pattern friction disc is applied pre-pressure.
4. speed-limiting protective device according to claim 1 or 3; it is characterized in that; described centrifugal speed limiting mechanism includes the multiple dynamic formula friction disc being fixedly connected respectively by key and described main shaft; and by multiple fixed pattern friction discs that screw and described centrifugal seat are fixedly connected; the alternately configuration of described multiple dynamic formula friction disc and fixed pattern friction disc; and described damping force adjustment spring is fixed on away from, on the outer side of the outermost fixed pattern friction disc of described centrifugal seat, described outermost fixed pattern friction disc directly being applied pressure.
5. speed-limiting protective device according to claim 4, it is characterised in that, it is provided with friction plate between described multiple dynamic formula friction disc and fixed pattern friction disc.
6. speed-limiting protective device according to claim 1, it is characterised in that, described centrifugal speed limiting mechanism includes one centrifugal piece, and described centrifugal piece is arranged in described centrifugal seat by rotating shaft.
7. speed-limiting protective device according to claim 1 or 6; it is characterized in that; described centrifugal speed limiting mechanism includes stud, governing spring and Spring pad; one end of described stud is fixed in described centrifugal seat, and described governing spring is pressed on described centrifugal piece by the other end of described stud by nut and described Spring pad.
8. speed-limiting protective device according to claim 4, it is characterised in that, described switch triggering mechanism comprises screw, block, resistance switch block and limit switch, wherein said block is fixed in described away from the outermost fixed pattern friction disc of this centrifugal seat, and it offers grooved hole; Described resistance switch block one end is connected on described screw, and the other end is then through the groove hole of described block; Described screw one end is arranged on described main shaft end by screw thread, and the extension of its other end is close to described limit switch.
9. speed-limiting protective device according to claim 8; it is characterized in that; described switch triggering mechanism includes and the nut that described screw matches; described resistance switch block is carried out axial location by described nut on described screw, by regulating the position of described nut to regulate the axial location of described resistance switch block.
10. speed-limiting protective device according to claim 9; it is characterized in that; described limit switch is fixedly installed on limit switch mounting plate; described limit switch mounting plate is fixed on the bonnet of described housing, and described screw extends through the hole at this bonnet center and is close to described limit switch.
11. speed-limiting protective devices according to claim 1, it is characterised in that, described centrifugal speed limiting mechanism includes multiple centrifugal piece equidistantly distributed around the center of described centrifugal seat, and each centrifugal piece is all arranged in described centrifugal seat by rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533225.3U CN205294540U (en) | 2015-07-22 | 2015-07-22 | Speed limit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520533225.3U CN205294540U (en) | 2015-07-22 | 2015-07-22 | Speed limit protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205294540U true CN205294540U (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520533225.3U Active CN205294540U (en) | 2015-07-22 | 2015-07-22 | Speed limit protection device |
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| CN (1) | CN205294540U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365011A (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 | Speed limit protection device with invariable braking force |
| CN109230325A (en) * | 2018-10-31 | 2019-01-18 | 广东省现代农业装备研究所 | A kind of headstock and its monorail conveyer of monorail conveyer |
| CN109531702A (en) * | 2018-12-18 | 2019-03-29 | 南京纳华动漫有限公司 | Die-cutting machine is adjustable roller |
-
2015
- 2015-07-22 CN CN201520533225.3U patent/CN205294540U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365011A (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 | Speed limit protection device with invariable braking force |
| CN106365011B (en) * | 2015-07-22 | 2019-06-18 | 上海市建筑科学研究院科技发展有限公司 | The constant speed-limiting protective device of brake force |
| CN109230325A (en) * | 2018-10-31 | 2019-01-18 | 广东省现代农业装备研究所 | A kind of headstock and its monorail conveyer of monorail conveyer |
| CN109230325B (en) * | 2018-10-31 | 2024-05-28 | 广东省现代农业装备研究所 | Locomotive of monorail conveyor and monorail conveyor thereof |
| CN109531702A (en) * | 2018-12-18 | 2019-03-29 | 南京纳华动漫有限公司 | Die-cutting machine is adjustable roller |
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