WO2016058256A1

WO2016058256A1 - Weightless safety clamp

Info

Publication number: WO2016058256A1
Application number: PCT/CN2014/093291
Authority: WO
Inventors: 邹家春; 孟红星; 姚荣康; 王伟; 陈明星
Original assignee: 邹家春
Priority date: 2014-10-16
Filing date: 2014-12-08
Publication date: 2016-04-21

Abstract

A weightless safety clamp comprises a mounting base, a brake component, a safety clamp control mechanism, a weightless control mechanism and/or an electromagnetic control mechanism, a safety mechanism. The brake component, the weightless control mechanism and/or the electromagnetic control mechanism, the safety clamp control mechanism and the safety mechanism are assembled on the mounting base. In a normal state, the safety clamp control mechanism is locked by the safety mechanism, and the brake component is locked by the safety clamp control mechanism. When the weightless control mechanism or the electromagnetic control mechanism acts, the safety mechanism is triggered so that the safety mechanism releases the lock on the safety clamp control mechanism, and the safety clamp control mechanism acts to trigger the brake component to generate a braking action. The design of the weightless safety clamp removes the existing mechanical speed limitation measurement and lifting control mechanism so that the triggering time is short, the braking energy is small, the braking process is stable and controllable, and the cost is greatly reduced.

Description

Weightless safety gear

Technical field

The invention belongs to the technical field of manufacturing safety components of elevators, and relates to a safety brake device, in particular to a weightless safety clamp.

Background technique

At present, the elevator rope breaking protection control system uses the mechanical speed limiter and the pulling system to control the safety gear. Because the speed of the mechanical speed limiter is above 115% (lower limit) of the rated speed or

(Unit: m/s, v is the rated speed of the elevator) to operate, combined with the idle travel time of the lifting mechanism, the inherent hysteresis increases the braking energy of the safety gear. After the safety problem occurs, it cannot be instantaneously controlled, but the speed is indirectly measured. The way the safety gear is triggered by the pulling mechanism. Therefore, the braking system has a long response time and an increased speed. The friction coefficient is sensitive to the guide rail, the braking energy is increased, and the system is poor in controllability.

According to the European standard FprEN81-20:2013 "Safety Code for Elevator Manufacturing and Installation", the speed limiter speed and the deceleration of the braking process are specified in the standard 5.6.2.2.1.

For progressive safety gears with a rated speed greater than 1 m/s, the speed at which the speed limiter is triggered is

The brake energy must be calculated at this speed during the design of the safety gear, taking into account the energy increase caused by the mechanical lag.

If the rated speed of the elevator is less than or equal to 0.63m/s, the instantaneous safety gear can be used. The design is based on the speed of 0.8m/s to calculate the braking energy, and the actual working condition is due to the hysteresis of the mechanical speed limiter and the pulling system. The braking energy increases far more than the braking energy at design time.

The search of the prior art literature found that the current safety gear is controlled by the mechanical speed limiter. Only when the elevator speed reaches the specified mechanical speed limiter action speed can the trigger mechanism be triggered to control the safety gear action. The inherent hysteresis of the air travel response time of the speed governor and the safety gear cannot be fundamentally solved, affecting the braking process, the system is safe and controllable, and there is a risk of safety loss, especially for the safety of high speed, super high speed and large load elevators. The realistic requirements were raised.

Summary of the invention

Since the existing safety gear is controlled by the mechanical speed limit measuring mechanism and the pulling control mechanism, the mechanism has complicated structure, high manufacturing cost, time lag, fast speed increase, friction coefficient and braking energy variation, etc. Defects, resulting in poor system stability for safe braking. In order to overcome the deficiencies of the prior art, the present invention provides a weightless safety gear that achieves the effect of breaking the rope, that is, triggering the brake. The design of the invention eliminates the original mechanical speed limit measurement and lifting control mechanism. The triggering time is short, the braking energy is small, the braking process is stable and controllable, and the cost is greatly reduced.

The invention adopts the following technical solutions: a weightless safety clamp, comprising a mounting seat, a brake component, a safety clamp control mechanism, a weight loss control mechanism and/or an electromagnetic control mechanism, an insurance mechanism, a brake component, a weight loss control mechanism and/or an electromagnetic The control mechanism, the safety clamp control mechanism and the insurance mechanism are assembled on the mounting seat. Under normal conditions, the safety mechanism locks the safety clamp control mechanism, and the safety clamp control mechanism locks the braking component; when the weightless control mechanism or the electromagnetic control mechanism operates, the safety mechanism is triggered. The insurance mechanism releases the locking of the safety gear control mechanism, the safety gear control mechanism operates, and the braking component is triggered to generate a braking action.

Preferably, the safety gear control mechanism comprises a pull rod (1), a lifting wedge (7), a guiding spring rod (19), a spring pressure plate (18), an energy storage spring (21), and a lifting plate (23), The fuse mechanism is a bumper, the brake component is a brake block; the guide spring bar (19) is mounted between the upper top plate (16) and the lower bottom plate (13) of the mount, and is mounted on the guide spring bar (19). a sliding spring pressure plate (18), a spring pressure plate (18) connected to the lifting plate (23), a lifting plate (23) connected to the brake pads (22) on both sides; the energy storage spring (21) is sheathed on the guiding spring a rod (19), the two ends of which are respectively mounted on the spring pressing plate (18) and the lower bottom plate (13); the pulling rod (1) passes through the upper top plate (16) and the spring pressing plate (18) and is connected to the pulling wedge (7); The pulling plate (23) is provided with a lateral movement groove (23-1), and the first end of the safety plate (9) is pressed in the lateral movement groove of the lifting plate (23).

Preferably, the weight loss control mechanism comprises a weight support (10), a weight shaft (11), a weight (12), a weight spring (15), and a weight support (10) is mounted between the lower base plate and the upper top plate of the mount. The weight (12) is rotatably mounted to the weight support (10) via the weight shaft (11); one end of the weight spring (15) is coupled to the weight (12) and the other end is coupled to the upper top plate.

Preferably, the upper top plate is provided with a spring adjusting assembly (17), and the spring adjusting assembly 17 comprises a nut member (17-1), a screw (17-2), an upper spring shaft (17-3), and the upper top plate (16) forms a strip. Long through hole (16-1), this through hole passes through the screw (17-2), the upper end of the screw (17-2) is screwed to the nut member (17-1), and the lower end of the screw (17-2) is mounted The spring shaft (17-3); the upper end of the weight spring (15) is connected to the upper spring shaft (17-3), and the lower end of the weight spring (15) is connected to the weight spring shaft (25), and the weight spring shaft ( 25) Assembled to heavy weights.

Preferably, the weight (12) forms a hook portion (12-1); the safety plate (9) is mounted on the fuse plate shaft (5), and the second end of the safety plate (9) is placed on the hook portion of the weight plate (12-1).

Preferably, the electromagnetic control mechanism comprises an electromagnet (3), the electromagnet is mounted on the mounting seat; the lifting wedge (7) forms a bevel (7-1) and a through hole (7-2); the middle edge of the insurance plate (9) The waist hole (9-1) is formed in the vertical direction, the two ends (9-1-1) of the waist hole (9-1) are large in diameter, and the middle section (9-1-2) is small; the safety plate shaft (5) passes through After the through hole (7-2) of the wedge (7) is lifted, it passes through the waist hole of the safety plate (9), and the safety plate shaft (5) is formed to match the inclined surface of the lifting wedge (7). The inclined surface (5-1), the safety plate rotating shaft (5) also forms an annular groove (5-2); in the normal state, the inclined surface (5-1) of the safety plate rotating shaft (5) is placed on the lifting wedge (7) The slope (7-1), the fuse shaft (5) is stuck at the upper end (9-1-1) of the waist hole (9-1) of the fuse plate (9), so that the safety plate (9) cannot be rotated and moved vertically. And when the safety plate shaft (5) moves to the annular groove (5-2) portion corresponding to the waist hole (9-1) of the safety plate (9), the safety plate (9) can rotate and move upward. .

Preferably, the brake member is an eccentric (311), and the eccentric is rotatably mounted to the mount.

Preferably, the weight loss control mechanism comprises a weight spring column (31), a gram force spring (32), a weight (34), a first gravity switch, a second gravity switch, and the mounting seat (314) is assembled to be both rotatable and capable The arm (36) of the lateral translation movement; the mounting seat (314) is connected to the weight spring column (31), the weight spring column (31) is suspended by the gram force spring (32), and the other end of the gram force spring (32) is hung One end of the weight (34), the other end of the weight (34) is connected to the first gravity switch (35), and the integral structure formed by the weight and the first gravity switch is rotatably mounted on the mounting seat (314); (314) is further equipped with an insurance arm plate (38), and a second gravity switch (37) capable of rotating is mounted on the safety arm plate (38), and an end surface of the second gravity switch (37) and the first gravity switch (35) The end face is in contact with the top end; in the normal state, the other end of the second gravity switch (37) is placed below the outer end of the safety arm (36); the safety arm (36) has a step on the safety arm (36) When the outward translational motion until the step portion faces the second gravity switch (37), the safety arm (36) loses the top contact of the second gravity switch (37); the inner end of the safety arm (36) is pressed against the eccentric wheel The upper part of (311); The mounting seat (314) is fitted with a torsion spring which causes the eccentric (311) to have a force opposite to the inner end of the safety arm (36).

Preferably, the safety tongs control mechanism comprises a lifting tab (316), and the lower end of the lifting tab (316) is rotatably coupled to one end of the rotating piece (317), and the middle portion of the lifting slewing piece (317) passes through The limiting rod (321) is rotatably mounted on the mounting seat (314), and the other end of the pulling and rotating piece (317) forms a convex portion (317-1), and the convex portion (317-1) is facing and can be oriented The upwardly bent section (36-3) of the outer pressure insurance arm (36).

Preferably, the electromagnetic control mechanism comprises an electromagnet (318), and the mounting seat (314) is fixedly mounted with an electromagnet (318). The shaft of the electromagnet (318) is connected to one end of the electromagnetic action rod (33), and the electromagnetic action rod (33) The middle portion is rotatably fitted to the mount (314), and the other end of the electromagnetic action rod (33) faces and can press the upwardly bent section (36-3) of the safety arm (36) outward.

Preferably, the spring platen (18) is coupled to a reset rod (24).

Preferably, the mounting seat (314) fixes the assembly guide rod (320) and the limiting rod (321), the guiding rod (320) is under the safety arm (36), and the safety arm (36) forms a concave portion (36). -1), the concave portion (36-1) is above the guide rod (320), and the safety arm plate (38) forms two vertical guide holes (38-1, 38-2), and the lower guide hole (38- 2) Pass through the outer end of the safety arm (36), and move up and down between the two. The limit lever (321) is above the safety arm (36). Correspondingly, the safety arm (36) has an upwardly facing projection (36-2). When the safety arm (36) moves outward, The retaining rod (321) is held by the stud (36-2), and the safety arm (36) is stopped from continuing to translate outward.

Preferably, the weight loss block (12) is composed of a plurality of masses. Of course, it can also be made in one piece, which can be of various shapes and structures.

Preferably, the damper (14) is mounted at a lower portion of the weight (12) away from the end of the weight shaft (11). The damper is mounted on the combined weightless block by a screw connection, and a damper such as a rubber damper, a spring damper, or a gas damper may be used. The installation of the damper on the combined weight can reduce the influence of the connecting member on the vibration of the combined weight, avoid the resonance phenomenon, and prevent the malfunction in the weightlessness control.

Preferably, the electromagnet mounting plate (4) is mounted on the lower base plate (13) of the mount, the electromagnet (3) is mounted on the electromagnet mounting plate (4), and the shaft of the electromagnet (3) is connected to the shaft through the split pin (6) The fuse plate is rotated on the shaft (5).

Preferably, the mounting seat (314) is formed with a concave notch in the longitudinal direction, the notch extending longitudinally through the guide rail (315), and the guide rail (315) is spaced from the side walls of the notch. Rotating eccentric wheels (311) are mounted on opposite sides of the mounting seat notch, and the two eccentric wheels (311) are interlocked by a synchronizing gear (313).

The safety clamp of the invention comprises: a weight loss control mechanism and/or an electromagnetic control mechanism, a safety clamp control mechanism, a mounting seat, etc., the weight loss control mechanism and the electromagnetic control mechanism are mounted on the safety clamp mounting seat, and are connected by a safety plate and a safety plate rotating shaft, and electromagnetic The control mechanism is connected with the safety shaft through the split pin, and the safety clamp control mechanism is connected with the safety plate rotating shaft. The weight loss control mechanism and the electromagnetic control mechanism are connected in parallel with the safety clamp control mechanism through the safety plate to form a parallel control mechanism, and the reset mechanism is installed in the safety clamp control. Institutional. The safety gear control mechanism is mounted on the safety gear mount. The weight loss control mechanism and the electromagnetic control mechanism are two sets of different detection actuators. When the weight loss control fails, the electromagnet control mechanism is released, and the safety clamp control mechanism triggers the safety clamp to operate, achieving double protection of the control system and ensuring safety brake of the safety clamp. . The invention also considers the interface of the original mechanical speed limit measuring mechanism and the safety tongs control mechanism when the safety tongs are under the overspeed protection in the non-complete weightless state. The weightless safety gear can use the weightless control mechanism and the electromagnetic actuator double actuator to control the safety gear.

The invention triggers the safety tong action by the weight loss measuring and controlling actuator, and has the advantages that when the safety problem occurs, the safety tongs act instantaneously to form protection, which overcomes the response time lag caused by the existing mechanical speed limiter and the pulling mechanism. Problems that increase system response time, reduce braking energy, maintain friction or brake stability, and reduce system manufacturing costs. When the moving object loses weight, the weight is deflected by the weight of the spring, the weight is deflected against the safety plate, the safety plate is disengaged, the energy storage spring of the safety gear control mechanism is released, and the brake is caused by the spring force. The wedge moves upwards and the safety gear moves. At the same time, the present invention adds a reset mechanism externally and automatically resets under the action of an external force. This design cancels the measurement control actuator of the existing mechanical speed limiter and lifting mechanism, and adopts the weight loss control mechanism, the electromagnetic control mechanism and the safety clamp control mechanism to solve the effects that the original mechanical speed limiter and the pulling mechanism cannot achieve. The structure has the characteristics of sensitive reaction, small braking energy, stable and controllable braking process, convenient installation and low system cost.

DRAWINGS

Fig. 1 is a front elevational view showing the first embodiment.

Fig. 2 is a cross-sectional view taken along line C-C of Fig. 1;

Fig. 3 is a cross-sectional view taken along line D-D of Fig. 2;

4 is a partial structural view of an electromagnetic control mechanism.

Figure 5 is a schematic diagram of the weight loss control structure.

Figure 6 is a schematic diagram of the safety gear control mechanism.

Figure 7 is a cross-sectional view of the shaft of the fuse plate.

Figure 8 is a cross-sectional view of the fuse plate.

Figure 9 is a structural view of Embodiment 2 (instantaneous safety gear).

Fig. 10 is a partial enlarged view of the second embodiment.

Fig. 11 is another partial enlarged view of the second embodiment.

Figure 1-8: 1. Pull rod, 2.U spring, 3. Electromagnet, 4. Electromagnet mounting plate, 5. Safety plate shaft, 6. Cotter pin, 7. Lifting wedge, 8. Roller Slide, 9. insurance board, 10. heavy block support, 11. heavy block shaft, 12. heavy block, 13. mount lower bottom plate, 14. damper, 15. heavy spring, 16. mount top plate , 17. Spring adjustment assembly, 17-1. Screw with hook, 17-2. Nut, 17-3. Set positioning screw, 18. Spring pressure plate, 19. Guide spring rod, 20. Guide plate, 21. Spring, 22. Brake block, 23. Lifting plate, 24. Reset lever, 25. Heavy spring shaft.

In Figure 9-11: 31. Heavy spring column, 32. gram force spring, 33. electromagnetic action rod, 34. weight, 35. gravity switch, 36. safety arm, 37. gravity switch, 38. 39. Torsion spring compression, 310. Torsion spring, 311. Eccentric wheel, 312. Pin, 313. Synchronous gear, 314. Mounting seat, 315. Guide rail, 316. Lifting stop, 317. Pulling revolving piece 318. Electromagnet, 319. Electromagnetic mounting plate, 320. Guide rod, 321. Limit rod.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Example 1

As shown in FIG. 1-8, the safety gear of the embodiment includes: a weight loss control mechanism, a safety clamp control mechanism, an electromagnetic control mechanism, and a mounting seat. The weight loss control mechanism includes a weight support 10, a weight shaft 11, a weight 12, and a weight reduction. The vibrator 14, the weight spring 15, and the spring adjusting assembly 17, the weightless block 12 of the present embodiment is composed of a plurality of masses. Of course, it may be integrally formed, and may have various shapes and various structures. A weight support 10 is mounted between the lower floor 13 of the mount and the upper top plate 16. The weight 12 is mounted on the weight support 10 via the weight shaft 11; one end of the weight spring 15 is coupled to the upper portion of the weight 12 (away from the end of the weight shaft 11) via a spring support shaft 25 (the weight 12 forms a gap, The shaft 25) is mounted at the notch, and the other end is connected to the spring adjustment assembly 17.

The spring adjustment assembly can be mounted on the bottom with a compression spring or a suspension tension spring. This embodiment employs a suspension type tension spring. The spring adjustment assembly 17 includes a nut member 17-1, a hooked bolt 17-2, and an upper spring shaft 17-3. The top plate 16 of the mounting seat forms an elongated through hole 16-1 which penetrates the screw 17-2 with the hook, and the upper end of the screw 17-2 (above the top plate 16) is screwed to the nut member 17-1. The top plate 16 is fixed to the mount by the nut member 1. The lower end of the screw 17-2 (below the top plate 16) is provided with a hook, and the hook portion of the screw is attached to the spring shaft 17-3. The upper end of the weight spring 15 is coupled to the upper spring shaft 17-3, and the lower end of the weight spring 15 is coupled to the weight spring shaft 25. The spring adjustment assembly is mainly used to adjust the spring force and the installation angle to meet different deceleration design requirements and manufacturing error effects, thereby realizing the influence of weight loss manufacturing or installation error on weight loss or adjustment of different weightless states.

The damper 14 is mounted at a lower portion of the weight 12 (one end away from the weight shaft 11). The damper is mounted on the combined weightless block by a screw connection, and a damper such as a rubber damper, a spring damper, or a gas damper may be used. The installation of the damper on the combined weight can reduce the influence of the connecting member on the vibration of the combined weight, avoid the resonance phenomenon, and prevent the malfunction in the weightlessness control.

During the normal operation of the elevator, under the action of gravity and spring force, the weight loss control mechanism is in equilibrium and will not affect the normal operation of the elevator. When the weight loss of the elevator reaches the control requirement, the weight is deflected under the action of the spring force, so that the safety switch is opened, and the safety clamp control mechanism activates the safety gear.

Referring to FIG. 6, the safety gear control mechanism includes a pull rod 1, a lifting wedge 7, a safety plate 9, a guide spring rod 19, a spring pressure plate 18, an energy storage spring 21, a lifting plate 23, a brake block 22, and a reset lever 24. The guiding spring rod 19 is mounted between the top plate 16 of the mounting seat and the lower bottom plate 13 of the mounting seat. The sliding spring pressing plate 18 is mounted on the guiding spring rod 19, and the spring pressing plate 18 is connected with the lifting plate 23, and the lifting plate 23 and the two sides are The brake pads 22 are connected, and each brake block 22 is slidably mounted on the guide plate 20 of the same side mount. The clamping faces of the brake pads 22 on both sides are opposite and spaced apart for passing through the guide rails. The accumulator spring 21 is sheathed on the guide spring rod 19, and its two ends are respectively placed on the spring pressure plate 18 and the lower bottom plate 13. The pull rod 1 is slidably passed through the upper top plate 16 and the spring pressure plate 18 from the top to the bottom and then connected to the lifting wedge 7. The pulling wedge 7 can be moved in the vertical direction under the driving of the pull rod 1. The pulling plate 23 is provided with a lateral movement groove 23-1. One end of the safety plate 9 is pressed into the lateral movement groove of the pulling plate 23, and the spring pressure plate 18 is also connected to the reset rod 24.

The weight 12 forms a hook portion 12-1. The safety plate 9 is fitted to the safety plate shaft 5 (the assembly structure of the two is shown below), and the two ends thereof are respectively placed on the hook portion 12-1 of the weight and the groove movement groove 23-1 of the lifting plate. In the normal running state of the elevator, the safety plate 9 is in an equilibrium state, that is, the middle portion is caught by the safety plate rotating shaft 5, and one end is pressed against the lifting plate 23, and the upward force of the energy storage spring 21 also makes it have an upward direction. The other end is supported by the weighted hook portion 12-1. Therefore, under the balance of the safety plate 9, the lifting plate 23 cannot move upward, so that the brake block 22 cannot move upward.

When the weight loss occurs, the weight loss control mechanism opens the switch of the safety plate 9, the energy storage spring 21 releases the energy in the direction of the guide spring rod 19, and the spring pressure plate 18 drives the brake block 22 through the lifting plate 23, and the safety gear brakes. At the time of resetting, an external force is applied by the reset lever 24, the spring pressure plate 18 compresses the energy storage spring 21, and the safety plate shaft 5 is opened by the pulling plate 23, so that the safety plate 9 is locked. When the safety gear is used for the down-speed over-speed protection, the original mechanical speed limiter and the pulling mechanism are used to drive the pull rod 1, and the pull rod 1 is pulled and pulled by the pull rod 1, and the inclined surface of the lifting wedge acts on the safety plate shaft 5 The safety plate rotating shaft 5 is moved against the frictional force to open the safety plate 9, and the energy storage spring 21 is released. The lifting plate 23 pulls up the brake block 22, and the safety gear moves. When the safety plate 9 is deflected, the safety plate 9 can be disengaged from the lateral movement groove, the spring pressure plate 18 releases the energy storage spring 21, and the spring pressure plate 18 interlocks the brake block 22 via the lifting plate 23, and the safety clamp operates.

The electromagnetic control mechanism includes an electromagnet 3, an electromagnet mounting plate 4, a safety plate rotating shaft 5, a split pin 6, and a safety plate 9. The electromagnet mounting plate 4 is mounted on the lower base plate 13 of the mount, and the electromagnet 3 is mounted on the electromagnet mounting plate 4. The shaft of the electromagnet 3 is connected to the safety plate shaft 5 via a split pin 6. The pulling wedge 7 forms a slope 7-1 and a vertical through hole 7-2. Insurance board 9 middle The waist hole 9-1 is formed in the vertical direction, and the two ends 9-1-1 of the waist hole 9-1 are large in diameter, and the middle portion 9-1-2 is small. After the safety plate shaft 5 passes through the through hole 7-2 of the pulling wedge 7, it passes through the waist hole of the safety plate 9, and the safety plate rotating shaft 5 forms a slope 5-1 which is adapted to the inclined surface of the lifting wedge 7. The fuse plate shaft 5 also forms an annular groove 5-2. Normally, the inclined surface 5-1 of the safety plate shaft 5 is placed on the inclined surface 7-1 of the lifting wedge 7, and the safety plate rotating shaft 5 (non-annular groove 5-2 portion) is caught on the waist hole 9-1 of the safety plate 9. The upper end 9-1-1 prevents the safety plate 9 from rotating or moving vertically. When the safety plate shaft 5 is moved, the annular groove 5-2 is moved to correspond to the waist hole 9-1 of the safety plate 9, since the outer diameter of the annular groove 5-2 is smaller than that of the waist hole 9-1. The diameter of the upper end 9-1-1 is adapted to the width of the intermediate section 9-1-2, so that the safety plate 9 can be rotated and moved upward.

When the weight loss control mechanism fails, the electromagnetic control mechanism is triggered to act, and under the action of the electromagnetic force of the electromagnet 3, the safety plate shaft 5 is pulled back until the annular groove 5-2 moves to the waist of the safety plate 9. The hole 9-1 corresponds to the position. At this time, the safety plate 9 can rotate and move upwards, and the safety plate 9 loses balance, so that the safety clamp control mechanism can be opened and pulled by the lifting plate 23 of the safety clamp control mechanism. The moving block 22 moves the safety gear.

Of course, in this embodiment, the safety plate can also be replaced by a structure such as a hook, a clamp, or the like.

When the elevator is running normally. Under the action of the gravity of the weight 12 and the force of the weight spring 15, the system is in an equilibrium state, the safety plate 9 is in the locked position, and the weight loss control mechanism does not affect the normal operation of the elevator.

When the elevator completely loses weight, the weight spring 15 forces the weight 12 to deflect, so that the safety plate 9 rotates on the safety plate shaft 5, the safety switch is opened, and the energy storage spring 21 in the safety gear control mechanism is along the guide spring rod. The energy is released in the direction of 19, and the pulling plate 23 is linked by the spring pressure plate 18. The lifting plate interlocks the brake block 22, and the safety gear moves.

When the weight loss control mechanism fails, under the action of the electromagnetic force of the electromagnet 3, the safety plate rotating shaft 5 is actuated, the safety plate 9 is moved by the safety plate rotating shaft 5, the safety switch is opened, and the energy storage spring 21 in the safety gear control mechanism is guided. The spring rod 19 releases energy, and the lifting plate 23 is linked by the spring pressure plate 18. The lifting plate interlocks the brake block 22, and the safety gear moves.

In this embodiment, after the weight loss control mechanism opens the safety plate switch, the energy storage spring releases energy in the direction of the guide spring bar, and the spring force is released by the compression or tension spring to lift the brake block motion. The safety plate can be opened by the weight loss control mechanism, the electromagnetic control mechanism or by the original mechanical speed limiter plus pulling mechanism through the drawbar. At the time of resetting, the external force is applied to the reset rod by the motor, the spring, the machine, the electromagnetic, etc., and the accumulator spring may be a gap spring or a continuous force applying spring.

Other structures and functions of the safety gear according to the above embodiments are consistent with the prior art, and reference may be made to the prior art.

The weight loss control mechanism, the safety clamp control mechanism and the electromagnetic control mechanism of the invention can be applied to other existing safety clamps, such as progressive safety clamps and instantaneous safety clamps. The following embodiment describes an application example of another instantaneous weightless safety gear.

Example 2

The safety gear of the embodiment adopts symmetrically arranged eccentric wheel, spring energy storage and gear forced synchronous clamping mode to brake, and the height of the clamp can be changed according to the load change, and the module is superimposed and used in series (increased series connection piece), which is suitable for weight loss, Pull, electromagnetic Braking in three working conditions. The structural principle is that the eccentric wheel and the base body are matched by a curved surface, the torsion spring is in a state of torsional compression and energy storage, and the rotation arm restrains its rotation, triggering the safety arm to release the eccentric wheel, and the torque accommodating the eccentric wheel to the guide rail quickly, resulting in High friction and lock the brake. The structure is described in detail as follows: As shown in FIGS. 9-11, the mounting seat 314 is formed with a concave notch along the longitudinal direction, the notch extending longitudinally through the guide rail 315, and the guide rail 315 is spaced from the side walls of the notch. Rotating eccentric wheels 311 are mounted on opposite sides of the mounting seat notch, and the two eccentric wheels 311 are interlocked by a synchronizing gear 313.

The mounting seat 314 (only a part of the mounting seat is shown in FIG. 9) is fixedly connected to the weight spring column 31, and the other end of the weight spring column 31 is suspended by the gram force spring 32, and the other end of the gram force spring 32 is hung at one end of the weight 34. The other end of the weight 34 is connected to the gravity switch 35 by bolts, and the central portion of the integral structure formed by the two is rotatably mounted to the mount 314 via the rotating shaft. The mounting bracket 314 is further equipped with a safety arm plate 38. The safety arm plate 38 is mounted with a rotatable gravity switch 37. One end surface of the gravity switch 37 is in contact with the end surface of the gravity switch 35, and the two are in equilibrium. Can't turn. Normally, the other end of the gravity switch 37 is placed below the outer end of the safety arm 36. The mounting seat 314 fixes the mounting guide 320 and the limiting rod 321 . The guiding rod 320 is under the safety arm 36 , and the safety arm 36 forms a concave portion 36 - 1 . The concave portion 36 - 1 is above the guiding rod 320 . Thus, the safety arm 36 is rotatably mounted to the mount 314 and is translatable (ie, toward the guide rail 315). The safety arm plate 38 forms two vertical guide holes 38-1, 38-2, and the lower guide hole 38-2 passes through the outer end of the safety arm 36, and the upper and lower movable joints are provided. The retaining rod 321 is above the safety arm 36. Correspondingly, the safety arm 36 has an upwardly facing projection 36-2. When the safety arm 36 moves outward, the projection 36-2 is supported by the projection 36-2. The lever 321 stops the safety arm 36 from continuing to translate outward. The safety arm 36 has a step thereon. When the safety arm 36 is translated outward (i.e., away from the guide rail 315) until its step is facing the gravity switch 37, the safety arm 36 loses the top contact of the gravity switch 37, and the safety arm 36 can be rotated. The inner end of the safety arm 36 is fixed to the pin 312, and the pin 312 is pressed against the upper portion of the eccentric 311.

The mounting seat 314 is provided with a torsion spring pressing piece 39 and a torsion spring shaft, and a torsion spring shaft outer casing torsion spring 310. The two ends of the torsion spring 310 are respectively placed on the torsion spring pressing piece 39 and the lower part of the eccentric wheel 311, and function as a torsion spring 310. Next, the eccentric 311 has a force that opposes the pin 312. Normally, the eccentric 311 is in equilibrium under the action of the torsion spring 310 and the pin 312.

The lower end of the lifting tab 316 is rotatably coupled to one end of the rotating piece 317 by a shaft. The middle portion of the lifting and rotating piece 317 is rotatably mounted on the mounting seat 314 by the limiting rod 321 to pull the other end of the rotating piece 317. A convex portion 317-1 is formed which passes through the upper vertical guide hole 38-1 of the safety arm plate 38 and is opposite to and can press the upwardly bent portion 36-3 of the safety arm 36 outward.

The mounting seat 314 is fixedly mounted with the electromagnet 318 through the electromagnetic mounting plate 319. The shaft of the electromagnet 318 is connected to one end of the electromagnetic action rod 33 through the split pin. The middle portion of the electromagnetic action rod 33 is rotatably mounted on the mounting seat 314 by the shaft, and the other end thereof is positive. The upwardly bent section 36-3 of the safety arm 36 can be pressed outwardly.

In the case of weightlessness control: when the car loses weight or sets the condition, the gram force spring 32 will break the original balance, so that the weight 34 and the gravity switch 35 are simultaneously deflected around the axis, the gravity switch 35 is opened, and the safety arm 36 loses the support point, so that It no longer limits the eccentric wheel 311, and the torsion spring 310 rotates the eccentric wheel 311 until the wheel surface is engaged with the guide rail 315 and the car stops.

During the lifting control: when the speed limiter is actuated, the pulling mechanism drives the lifting and rotating piece 317 to rotate by the lifting tab 316, and the bump will push the safety arm 36 to move, so that the safety arm 36 is not restricted, and the eccentricity The wheel 311 is rotated by the torsion spring 310 until the wheel surface is engaged with the guide rail 315, and the car is stopped.

During electromagnetic control: the circuit detects that the elevator is in the state of broken rope or overspeed, so that the electromagnet 318 is energized to push the safety arm 36 to move, so that the safety arm 36 is not restricted, and the eccentric wheel 311 is under the action of the torsion spring 310. Rotate to the tread and the guide rail 315 is stuck and the car stops.

The weightless safety clamp of the invention comprises a weight loss control mechanism, a safety clamp control mechanism, an electromagnetic control mechanism, a mounting seat, etc., which saves the original speed limiter and the pulling mechanism, and adopts a weight loss control mechanism, a safety clamp control mechanism and an electromagnetic control mechanism. . When the car loses weight, the weight loss control mechanism opens the safety clamp control mechanism through the safety plate, and the lifting plate of the full clamp control mechanism lifts the brake block, and the safety gear instantly triggers the action. If the system detects that the weightless mechanism fails, the electromagnet control mechanism can also open the safety clamp control mechanism, and the safety clamp is used for the downstream overspeed protection in the non-complete weightless state, and the original mechanical speed limit measuring mechanism and the safety clamp control are retained. The interface of the mechanism can also be controlled by the original speed limiter pulling mechanism. This mechanism has the characteristics of fast response, small braking energy, stable and controllable, high safety, convenient installation and low system cost.

The preferred embodiments of the present invention have been described in detail above, and those skilled in the art will be able to change the specific embodiments according to the ideas provided by the present invention, and these changes should also be regarded as the protection of the present invention. range.

Claims

A weightless safety gear, which comprises a mounting seat, a brake component, a safety gear control mechanism, a weight loss control mechanism and/or an electromagnetic control mechanism, an insurance mechanism, a brake component, a weight loss control mechanism and/or an electromagnetic control mechanism, and safety The clamp control mechanism and the insurance mechanism are assembled on the mounting seat. Under normal conditions, the insurance mechanism locks the safety clamp control mechanism, and the safety clamp control mechanism locks the brake component; when the weight loss control mechanism or the electromagnetic control mechanism operates, the safety mechanism is triggered to make the insurance institution The locking of the safety gear control mechanism is released, the safety gear control mechanism is actuated, and the braking component is triggered to generate a braking action.
The weight loss safety gear according to claim 1, wherein the safety gear control mechanism comprises a pull rod (1), a lifting wedge (7), a guide spring rod (19), a spring pressure plate (18), and an energy storage spring ( 21), lifting plate (23), the insurance mechanism is a bumper, the braking component is a brake block; the guiding spring bar (19) is mounted on the upper top plate (16) and the lower bottom plate of the mounting seat ( 13), the sliding spring pressure plate (18) is mounted on the guiding spring rod (19), the spring pressure plate (18) is connected with the lifting plate (23), the lifting plate (23) and the braking blocks on both sides (22) Connected; the energy storage spring (21) is jacketed on the guiding spring rod (19), the two ends of which are respectively mounted on the spring pressing plate (18) and the lower bottom plate (13); the pulling rod (1) passes through the upper top plate (16) and the spring pressing plate ( 18) Rear connection of the pulling wedge (7); the lifting plate (23) is provided with a lateral movement groove (23-1), and the first end of the safety plate (9) is pressed against the lateral movement groove of the lifting plate (23) Inside.
A weight loss safety gear according to claim 2, wherein the weight loss control mechanism comprises a weight support (10), a weight shaft (11), a weight (12), a weight spring (15), and a lower base plate. A weight support (10) is mounted between the upper top plate and the weight (12) is rotatably mounted to the weight support (10) via the weight shaft (11); one end of the weight spring (15) is connected to the weight (12) ), the other end is connected to the upper top plate.
The weight loss safety gear according to claim 3, wherein the upper top plate is provided with a spring adjusting assembly (17), and the spring adjusting assembly 17 comprises a nut member (17-1), a screw (17-2), and an upper spring shaft ( 17-3), the upper top plate (16) forms an elongated through hole (16-1), the through hole passes through the screw (17-2), and the upper end of the screw (17-2) is screwed to the nut member (17-1) ), the lower end of the screw (17-2) is mounted with a spring shaft (17-3); the upper end of the weight spring (15) is connected to the upper spring shaft (17-3), and the lower end of the weight spring (15) is connected to the weight The block spring shaft (25) and the weight spring shaft (25) are assembled to the weight.
A weightless safety gear according to claim 3 or 4, wherein the weight (12) forms a hook portion (12-1); the safety plate (9) is fitted to the safety plate shaft (5), and the safety plate ( The second end of 9) is placed on the hook portion (12-1) of the weight.
A weight loss safety gear according to claim 5, wherein the electromagnetic control mechanism comprises an electromagnet (3), the electromagnet is mounted on the mounting seat, and the lifting wedge (7) forms a bevel (7-1) and a through hole ( 7-2); the middle part of the fuse plate (9) forms a waist hole (9-1) in the vertical direction, and the two ends (9-1-1) of the waist hole (9-1) have a large diameter, and the middle portion (9-1- 2) Small; the fuse plate shaft (5) passes through the through hole (7-2) of the lifting wedge (7), and then passes through the waist hole of the safety plate (9), and the fuse plate shaft (5) is formed and raised. The slope of the wedge (7) is adapted to the inclined plane (5-1), and the fuse shaft (5) also forms an annular groove (5-2); in the normal state, the slope of the safety plate shaft (5) (5- 1) The bevel (7-1) of the lifting wedge (7) is clamped to the upper end (9-1-1) of the waist hole (9-1) of the safety plate (9), The insurance plate (9) is prevented from rotating and moving vertically; and when the safety plate shaft (5) is moved to the annular groove (5-2) portion corresponding to the waist hole (9-1) of the safety plate (9), The safety plate (9) can rotate and move upwards.
The weight loss safety gear according to claim 1, wherein said brake member is an eccentric (311), and said eccentric is rotatably mounted to said mount.
The weight loss safety gear according to claim 7, wherein the weight loss control mechanism comprises a weight spring column (31), a gram force spring (32), a weight (34), a first gravity switch, and a second gravity switch. The mounting seat (314) is equipped with a safety arm (36) which can rotate and translate laterally; the mounting seat (314) is connected to the weight spring column (31), and the heavy spring column (31) is suspended by the force spring (32). The other end of the gram force spring (32) is hung on one end of the weight (34), and the other end of the weight (34) is connected to the first gravity switch (35), and the whole structure formed by the weight and the first gravity switch is rotated in the middle. Mounted on the mount (314); the mount (314) is also equipped with a safety arm plate (38), and the second arm switch (37) is mounted on the bumper arm (38), and the second gravity switch ( One end face of 37) is in contact with the end surface of the first gravity switch (35); normally, the other end of the second gravity switch (37) is placed below the outer end of the safety arm (36); the safety arm ( 36) having a step on which the safety arm (36) loses the top contact of the second gravity switch (37) when the safety arm (36) translates outwardly until its step is facing the second gravity switch (37); Insurance (36) is pressed against the upper end of the inner eccentric (311); a mount (314) assembly torsion spring, the torsion spring so that the eccentric wheel (311) having a pressure end and an opposite inner safety arm (36) forces.
A weight loss safety gear according to claim 8, wherein the safety gear control mechanism comprises a lifting tab (316), and the lower end of the lifting tab (316) is pivotally coupled to one end of the rotating piece (317). The middle portion of the pulling revolving piece (317) is rotatably assembled to the mounting seat (314) through the limiting rod (321), and the other end of the pulling revolving piece (317) is formed with a convex portion (317-1). The convex portion (317-1) faces and can press the upwardly bent section (36-3) of the safety arm (36) outward.
The weight loss safety gear according to claim 8 or 9, wherein the electromagnetic control mechanism comprises an electromagnet (318), the mounting seat (314) is fixedly mounted with the electromagnet (318), and the shaft of the electromagnet (318) is connected to the electromagnetic function. One end of the rod (33), the middle portion of the electromagnetic action rod (33) is rotatably fitted to the mounting seat (314), and the other end of the electromagnetic action rod (33) is directly opposite and can be pressed outwardly to fold upward of the safety arm (36). Curved section (36-3).
A weightless safety gear according to any of claims 2-4, characterized in that the spring pressure plate (18) is connected to a reset lever (24).
The weightless safety gear according to any one of claims 1-4, 7-9, wherein the mounting seat (314) is fixedly assembled with a guide rod (320), a limiting rod (321), and the guiding rod (320) is at least Under the safety arm (36), the safety arm (36) forms a concave portion (36-1), the concave portion (36-1) is above the guide rod (320), and the safety arm plate (38) is formed. Two vertical guide holes (38-1, 38-2) and lower guide holes (38-2) pass through the outer end of the safety arm (36), and the upper and lower movable joints are arranged; the limit rod (321) is insured Above the arm (36), correspondingly, the safety arm (36) has an upwardly facing stud (36-2), and when the safety arm (36) moves outward, the protuberance (36-2) ) Hold the limit lever (321) and stop the safety arm (36) from continuing to translate outward.
A weightless safety gear according to claim 3 or 4, wherein the weight (12) is composed of a plurality of pieces or is integrally formed.
A weightless safety gear according to claim 13, wherein the lower portion of the weight (12) is provided with a damper (14).
The weight loss safety gear according to claim 6, wherein the electromagnet (3) is mounted on the electromagnet mounting plate (4), and the electromagnet mounting plate (4) is mounted on the lower base plate (13) of the mounting seat, and the electromagnet ( The shaft of 3) is connected to the fuse shaft (5) via a split pin (6).
A weightless safety gear according to any one of claims 7-9, wherein the mounting seat (314) is formed with a concave notch in the longitudinal direction, the notch extending longitudinally through a guide rail (315), the guide rail (315) and the notch A spacing is left between the side walls; the opposite sides of the notch are mounted with the rotatable eccentric (311), and the two eccentrics (311) are interlocked by a synchronizing gear (313).