CN108928709B - Mechanical self-resetting weightless safety tongs - Google Patents
Mechanical self-resetting weightless safety tongs Download PDFInfo
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- CN108928709B CN108928709B CN201710393316.5A CN201710393316A CN108928709B CN 108928709 B CN108928709 B CN 108928709B CN 201710393316 A CN201710393316 A CN 201710393316A CN 108928709 B CN108928709 B CN 108928709B
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- 230000007246 mechanism Effects 0.000 claims abstract description 109
- 238000004146 energy storage Methods 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 9
- 230000004580 weight loss Effects 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/22—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of linearly-movable wedges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The safety tongs comprise a mounting seat braking mechanism and a resetting mechanism, wherein the braking mechanism and the resetting mechanism are assembled on the mounting seat, the resetting mechanism comprises an elastic piece, the resetting mechanism is connected with the braking mechanism through the elastic piece, and when the braking mechanism generates braking action, the elastic piece is enabled to store energy; when the braking mechanism is released, the elastic piece enables the braking mechanism to reset. The mechanical reset mechanism with simple structure is arranged in the safety tongs, after the elevator car or the counterweight is lifted, the mechanical automatic reset of the safety tongs is realized through energy storage in the braking process, and the safety tongs has the advantages of sensitive response, small influence of environmental factors, stable and controllable reset process and low reset system cost.
Description
Technical Field
The invention belongs to the technical field of elevator safety component manufacturing, and relates to a safety braking device, in particular to a mechanical self-resetting weightless safety clamp.
Background
The safety gear device for an elevator is a safety device for stopping an elevator car in an emergency and holding the car on a guide rail in a stationary state when the running speed of the elevator exceeds a limit speed set by the elevator governor under the operation of the elevator governor or when a suspension rope breaks and slacks. The safety tongs provide important and effective protection effect for the safe operation of the elevator, and the working principle of the safety tongs is as follows: the safety tongs lever drives the speed limiter wire rope, the tension wheel keeps the friction force between the speed limiter wire rope and the speed limiter wheel, so that the rotating speed of the speed limiter wheel is consistent with the running speed of the car, when the running speed of the car exceeds 1.15 times of the rated speed, the speed limiter acts, the brake rope block presses the speed limiter wire rope to stop running, and the safety tongs lever is driven to act.
According to GB7588-2003 safety Specification for manufacture and installation of elevators 9.8.3.2, provision is made for: the existing safety tongs do not use an electric, hydraulic or pneumatic operated device to operate the safety tongs, therefore, the existing safety tongs all use a mechanical speed limiter as a measuring mechanism, and only when the speed of an elevator reaches or exceeds the action speed of the specified mechanical speed limiter, the lifting mechanism can be triggered to control the safety tongs to act, the inherent hysteresis of the mechanical speed limiter and the idle stroke response time of the safety tongs cannot be fundamentally solved, the braking process is influenced, the safety controllability of the system is poor, the safety runaway risk exists, in order to overcome the defect, the patent with the authorized bulletin number CN104326322B (patent No. 201410548328.7) discloses a weightless safety tongs, the speed limiting measuring mechanism and the lifting control mechanism of the traditional safety tongs are omitted, but a remote reset system or an automatic reset system is needed, if a motor screw remote reset mode is adopted, the reset cannot be completed when no external energy is used, the emergency braking rescue is influenced, and in order to solve the problem, the control system and the external energy are needed to be increased, and the product cost is greatly increased; if an electromagnet remote resetting mode is adopted, the electromagnet cannot complete resetting when external energy is lost or insufficient.
Disclosure of Invention
The invention provides a mechanical self-resetting weightless safety tongs, which aims to solve the practical problems of complex control, high manufacturing cost and unreliable resetting caused by the fact that the resetting function of the existing weightless safety tongs depends on external energy driving, remote resetting and emergency rescue.
The technical scheme adopted by the invention is as follows:
the mechanical self-resetting weightless safety tongs comprise a mounting seat braking mechanism and a resetting mechanism, wherein the braking mechanism and the resetting mechanism are assembled on the mounting seat, the resetting mechanism comprises an elastic piece, the resetting mechanism is connected with the braking mechanism through the elastic piece, and when the braking mechanism generates braking action, the elastic piece is enabled to store energy; when the braking mechanism is released, the elastic piece enables the braking mechanism to reset.
Preferably, the reset mechanism further comprises a reset component, and when the brake mechanism acts, the brake mechanism triggers the reset component to act; the reset assembly resets the reset mechanism when the brake mechanism is released.
Preferably, the reset assembly comprises a reset plate and an elastic body, wherein the elastic body is arranged on the reset plate, and when the braking mechanism acts, the braking mechanism enables the elastic body to store energy through the reset plate; when the braking mechanism is released, the elastic body enables the reset mechanism to reset through the reset plate.
Preferably, the brake mechanism includes a wedge assembly including a wedge coupled to the resilient member.
Preferably, the safety tongs are provided with a weightless triggering mechanism, and the weightless triggering mechanism is in a balanced state in a normal state; and when the weight loss trigger mechanism is abnormal, triggering the braking mechanism to act.
Preferably, the weightless triggering mechanism comprises a weight and a weight connector, wherein the weight is connected to the mounting seat through the weight connector and is rotatably mounted on the reset mechanism.
Preferably, the weight comprises a left weight, a right weight and a weight connecting piece, wherein the left weight and the right weight are symmetrically arranged and are connected through the weight connecting piece.
Preferably, the weightless triggering mechanism comprises a lock hook, the lock hook is rotatably installed on the reset mechanism, and the lock hook clamps the braking mechanism in a normal state; and when the brake mechanism is abnormal, the lock hook releases the brake mechanism, and the brake mechanism generates brake action.
Preferably, the safety tongs are provided with an electromagnetic control mechanism, and the electromagnetic control mechanism is in a static state in a normal state; and when the weight loss trigger mechanism is abnormal, the electromagnetic control mechanism triggers the braking mechanism to act.
Preferably, the electromagnetic control mechanism comprises an electromagnet, an electromagnet fixing seat and an electromagnet pushing plate, wherein the electromagnet is arranged on the mounting seat through the electromagnet fixing seat, and the electromagnet pushing plate is arranged at the ejection end of the electromagnet.
The mechanical automatic reset mechanism with simple structure is arranged in the safety tongs, after the elevator car or the counterweight is lifted, the safety tongs can be automatically reset mechanically, the problem that the reset depends on external energy or transportation is solved, and the safety tongs have the advantages of sensitive response, small influence of environmental factors, stable and controllable reset process and low reset system cost.
Drawings
Fig. 1 is an exploded view of an embodiment of the present invention.
Fig. 2 is a front view block diagram of an embodiment of the present invention.
FIG. 3 is an assembly view of a left wedge assembly according to an embodiment of the present invention.
Fig. 4 is an assembly view of a weight loss trigger mechanism according to an embodiment of the present invention.
Fig. 5 is an assembly view of a reset mechanism according to an embodiment of the present invention.
Fig. 6 is a cross-sectional view taken along line A-A in fig. 2 of the reset front in accordance with an embodiment of the present invention.
FIG. 7 is a cross-sectional view taken along section line A-A in FIG. 2 after reset in accordance with an embodiment of the present invention.
In fig. 1-7:
1. mounting base 1: the upper top plate 1-1, the lower bottom plate 1-2, the left side plate 1-3, the right side plate 1-4.1-5 middle partition plate, the guide rail chute 1-6, the left bolt and nut assembly 1-7, the right bolt and nut assembly 1-8, the left wedge block seat 1-9, the left wedge block seat hole 1-9-1, the left wedge block seat bolt and nut assembly 1-9-2, the left wedge block seat slide rail 1-9-3, the left wedge block seat base 1-9-4, the right wedge block seat 1-10, the right wedge block seat hole 1-10-1, the right wedge block seat bolt and nut assembly 1-10-2, the right wedge block seat slide rail 1-10-3 and the right wedge block seat base 1-10-4;
2. a braking mechanism: the left wedge block assembly 2-1, the left wedge block 2-1-1, the left adjusting sleeve 2-1-2, the left wedge block push plate 2-1-3, the left wedge block spring hanging column 2-1-4, the right wedge block assembly 2-2, the right wedge block 2-2-1, the right adjusting sleeve 2-2-2-2, the right wedge block push plate 2-3, the right wedge block spring hanging column 2-2-4, the left ball slide row 2-3, the right ball slide row 2-4, the swinging plate 2-5, the swinging plate spring hanging column mounting hole 2-5-1, the swinging plate groove 2-5-2, the swinging plate rotating shaft 2-6, the left swinging plate spring hanging column 2-7, the right swinging plate spring hanging column 2-8, the left torsion spring 2-9, the right torsion spring 2-10, the U-shaped spring 2-11, the left hole 2-11-1 and the right hole 2-11-2-2;
3. weight loss triggering mechanism: the device comprises a fixed plate 3-1, an adjusting seat 3-2, an adjusting screw 3-3, a weight tension spring 3-4, a weight 3-5, a left weight 3-5-1, a threaded hole 3-5-1-1 on the left weight, a rotating shaft hole 3-5-1-2 on the left weight, a right weight 3-5-2, a threaded hole 3-5-2-1 on the right weight, a rotating shaft hole 3-5-2-2 on the right weight, a shifting plate 3-6, a weight rotating shaft 3-7, a lock hook 3-8, a lock hook rotating shaft hole 3-8-1, a lock hook rotating shaft 3-9, a lock hook torsion spring 3-10, a lock hook adjusting screw 3-11 and a double-headed screw 3-12;
4. electromagnetic control mechanism: the electromagnet 4-1, the electromagnet fixing seat 4-2 and the electromagnet pushing plate 4-3;
5. reset mechanism, reset component 5-1, reset plate 5-1-1, pull rod 5-1-2, pull pin 5-1-3 and guide column 5-1-4
The device comprises a pressure spring 5-1-5, a limit retainer ring 5-1-6, a trigger frame 5-2, a weight rotating shaft hole 5-2-1, a lock hook rotating shaft hole 5-2-2, a left feedback rotating shaft 5-3, a right feedback rotating shaft 5-4, a left feedback pressing plate 5-5, a left pull pin groove 5-5-1, a left feedback pressing plate flange 5-5-2, a right feedback pressing plate 5-6, a right pull pin groove 5-6-1, a left feedback pressing plate flange 5-6-2, a left energy storage spring 5-7 and a right energy storage spring 5-8.
Detailed Description
In fig. 1 to 7, the safety gear of the present embodiment includes: the device comprises a mounting seat 1, a braking mechanism, a weightless triggering mechanism or an electromagnetic control mechanism and a resetting assembly 5, wherein the braking mechanism, the weightless triggering mechanism or the electromagnetic control mechanism and the resetting assembly 5 are all arranged in the mounting seat 1.
The installation seat 1 is also provided with an upper top plate 1-1 and a lower bottom plate 1-2, a braking mechanism, a weightless triggering mechanism or an electromagnetic control mechanism and a resetting assembly 5 are respectively arranged between the upper top plate 1-1 and the lower bottom plate 1-2 of the installation seat 1, the upper top plate 1-1 and the lower bottom plate 1-2 are also provided with a guide rail chute 1-6 for an elevator car guide rail to pass through, the installation seat is also provided with a left side plate 1-3, a right side plate 1-4 and a middle partition plate 1-5, the left side plate 1-3 and the right side plate 1-4 are symmetrically arranged, and the middle partition plate 1-5 is arranged between the upper top plate 1-1 and the lower bottom plate 1-2.
The left bolt and nut assembly 1-7 penetrates through holes 1-3-1 on a left side plate 1-3, left holes 2-11-1 on a U-shaped spring 2-11 of a brake mechanism and holes 1-9-1 on a left wedge block seat 1-9, the left side plate 1-3, the U-shaped spring 2-11 and the left wedge block seat 1-9 are connected together, the left wedge block seat 1-9 connects 2 pieces of left wedge block seat slide rails 1-9-3 and left wedge block seat bases 1-9-4 into a whole through 3 groups of left wedge block seat bolt and nut assemblies 1-9-2, the right wedge block seat 1-10 and the left wedge block seat 1-9 are in the same structure and are symmetrically arranged, the U-shaped spring 2-11 is also provided with right side holes 2-11-2 which are symmetrical with the left side holes 2-11-1, the right bolt and nut assembly 1-8 penetrates through the holes 1-4-1 on the right side plate 1-1, the right side holes 2-11-2 and the holes 1-10-1 on the right wedge block seat 1-10, and the right side plate 1-4, the U-2-11-10 and the right wedge block seat 1-10 are connected together through the 3 groups of left wedge block seat slide rails 1-9-3 and the right wedge block seat base 1-10.
The brake mechanism is provided with a left wedge block component 2-1, a right wedge block component 2-2, a left ball sliding row 2-3, a right ball sliding row 2-4, a swinging plate 2-5, a swinging plate rotating shaft 2-6, a left swinging plate spring hanging column 2-7, a right swinging plate spring hanging column 2-8, a left torsion spring 2-9, a right torsion spring 2-10 and a U-shaped spring 2-11, wherein the left wedge block component 2-1 and the right wedge block component 2-2 are identical in structure and symmetrically arranged, the left ball sliding row 2-3 and the right ball sliding row 2-4 are identical in structure and symmetrically arranged, the left swinging plate spring hanging column 2-7 and the right swinging plate spring hanging column 2-8 are identical in structure and symmetrically arranged, and the left torsion spring 2-9 and the right torsion spring 2-10 are identical in structure and symmetrically arranged; taking the left side of a brake mechanism as an example to illustrate the installation position relation among all components, the left wedge block assembly 2-1 is installed in a chute formed by wedge block seat sliding rails 1-9-3 of a left wedge block seat 1-9 in a sliding manner like a traditional safety tongs, and a left ball sliding row 2-3 is installed between the left wedge block assembly 2-1 and the left wedge block seat 1-9 to change sliding friction into rolling friction; the left wedge block assembly 2-1 comprises a left wedge block 2-1-1, a left adjusting sleeve 2-1-2, a left wedge block pushing plate 2-1-3 and a left wedge block spring hanging column 2-1-4, wherein the left adjusting sleeve 2-1-2 is arranged at the top of the left wedge block 2-1-1, the left wedge block pushing plate 2-1-3 is fixed at the top of the left adjusting sleeve 2-1-2 by bolts 2-1-5, the left wedge block spring hanging column 2-1-4 is arranged on the side surface of the left wedge block 2-1-1, and a clamping surface 2-1-1 of the left wedge block assembly 2-1 and a clamping surface 2-2-1-1 of the right wedge block assembly 2-2 are opposite and are spaced, so as to penetrate through a car guide rail; the swinging plate 2-5 is arranged on a swinging plate rotating shaft 2-6, two ends of the swinging plate rotating shaft 2-6 are respectively arranged on a left side plate 1-3 and a right side plate 1-4 by using bolt and nut components, the swinging plate 2-5 is provided with a mounting hole 2-5-1 of a left swinging plate spring hanging column 2-6, and a left energy storage spring 5-2 of a reset mechanism connects the left side of the swinging plate 2-5 with the left wedge block component 2-1 through the left swinging plate spring hanging column 2-6 and the left wedge block spring hanging column 2-1-4 of the left wedge block component 2-1, and similarly, the right side of the swinging plate is connected with the right wedge block component 2-2; the swing plate 2-5 is also provided with a rectangular swing plate groove 2-5-4; the left torsion spring 2-9 and the right torsion spring 2-10 are arranged on the swinging plate rotating shaft 2-6 and are symmetrical along the left and right central lines of the swinging plate 2-5 to provide torsion for the swinging plate 2-5;
the weightless triggering mechanism is provided with a fixed plate 3-1, an adjusting seat 3-2, an adjusting screw 3-3, a weight tension spring 3-4, a weight 3-5, a poking plate 3-6, a weight rotating shaft 3-7, a lock hook 3-8, a lock hook rotating shaft 3-9, a lock hook torsion spring 3-10, a lock hook adjusting screw 3-11 and a double-headed screw 3-12, wherein the fixed plate 3-1 is arranged on an upper top plate 1-1 of the mounting seat 1 through a bolt 3-13, the adjusting screw 3-3 with the adjusting seat 3-2 passes through the fixed plate 3-1, the adjusting seat 3-2 is connected with one end of the weight tension spring 3-4 through a hook hole 3-2-1 on the adjusting seat, the other end of the weight tension spring 3-4 is hooked on the double-headed screw 3-12, in the example, the weight tension spring 3-4 adopts a suspension tension spring, and also can be a compression spring; the adjusting seat 3-2 is mainly used for adjusting the elasticity and the installation angle of the weight tension spring 3-4 so as to meet different design requirements of deceleration and influence of manufacturing errors, thereby realizing the influence on weightlessness or adjustment control of different weightlessness states caused by the manufacturing or installation errors of the weights; the weight 3-5 is formed by symmetrically connecting a left weight 3-5-1 and a right weight 3-5-2 which are symmetrical in shape through a shifting plate 3-6 and a double-head screw 3-12, specifically, the double-head screw 3-12 passes through a threaded hole 3-5-1-1 on the left weight 3-5-1 and a threaded hole 3-5-2-1 on the right weight 3-5-2, the left weight 3-5-1 and the right weight 3-5-2 are symmetrically arranged on the double-head screw 3-12, the shifting plate 3-6 is respectively connected with the left weight 3-5-1 and the right weight 3-5-2 through 4 groups of screws and is arranged between the left weight 3-5-1 and the right weight 3-5-2, and the weight 3-5 can also be made into a whole body, and can be in various shapes and structures; then, the weight rotating shaft 3-7 passes through the left weight rotating shaft hole 5-2-1, the right weight rotating shaft hole 5-2-2, the hole 3-5-1-2 and the hole 3-5-2-2 on the left weight 3-5-1 and the right weight 3-5-2 on the trigger frame 5-2 of the reset mechanism, and the left weight 3-5-1 and the right weight 3-5-2 are rotatably arranged on the trigger frame 5-2; the lock hook 3-8 is rotatably fixed on the trigger frame 5-2 through the lock hook rotating shaft 3-9 passing through the opposite hole 5-2-3 on the trigger frame 5-2, the lock hook adjusting screw 3-11 passes through the adjusting screw hole 3-8-1 of the lock hook 3-8 to be used for adjusting the angle of the locking state of the lock hook 3-8, the torsion force of the lock hook torsion spring 3-10 acts on the lock hook adjusting screw 3-11 as a locking force, and the lock hook 3-8 is prevented from misoperation under the normal running state of the elevator.
In the normal operation process of the elevator, the weightless triggering mechanism is clamped in the swinging plate groove 2-5-4 by the upward elasticity of the weight tension spring 3-4 and the downward gravity of the weight 3-5, so that the swinging plate 2-5 is prevented from rotating, the weightless triggering mechanism rotates to be in a balanced state, and the safety tongs in the embodiment do not act and do not influence the normal operation of the elevator. When the elevator weightlessness reaches the control requirement, under the action of the spring force of the weight tension spring 3-4, the weight 3-5 moves upwards to deflect, then the lock hook 3-8 is separated from the swing plate groove 2-5-4, the swing plate 2-5 loses the constraint of the lock hook 3-8, the end part of the swing plate 2-5 upwards supports the left wedge block assembly 2-1 and the right wedge block assembly 2-2 through the rotation of the left torsion spring 2-9 and the right torsion spring 2-10, and the braking mechanism enables the safety tongs in the embodiment to act.
The electromagnetic control mechanism is arranged on the lower bottom plate 1-2 of the mounting seat 1 and below the weight 3-5, and consists of an electromagnet 4-1, an electromagnet fixing seat 4-2 and an electromagnet pushing plate 4-3, wherein the electromagnet 4-1 is arranged below a double-head screw 3-12 of the weight 3-5 by the electromagnet fixing seat 4-2, and the electromagnet pushing plate 4-3 is arranged at the ejection end part of the electromagnet 4-1, and in the example, the electromagnetic control mechanism can be arranged on the side surface of the mounting seat or arranged on the side of the lock hook to drive the electromagnet to rotate in other forms; when the elevator goes down to overspeed, the electronic speed limiter gives a signal to the electromagnet 4-1, at the moment, the end part of the electromagnet is ejected out, the electromagnet push plate 4-3 pushes the weight 3-5 to rotate a certain angle so as to open the lock hook 3-8, and the safety tongs control mechanism 2 enables the safety tongs to act.
The reset mechanism comprises a reset component 5-1, a trigger frame 5-2, a feedback left rotating shaft 5-3, a feedback right rotating shaft 5-4, a feedback left pressing plate 5-5, a feedback right pressing plate 5-6, a left energy storage spring 5-7 and a right energy storage spring 5-8. The reset component 5-1 is arranged in a bilateral symmetry structure and comprises a reset plate 5-1-1, a pull rod 5-1-2, a pull pin 5-1-3, a guide pillar 5-1-4, a pressure spring 5-1-5 and a limit retainer 5-1-6, one end of the pull rod 5-1-2 is fixed on the foot of the reset plate 5-1 by bolts, the other end of the pull rod 5-1-2 is provided with a hole 5-1-2-1 for the pull pin 5-1-3 to pass through, the pull pin 5-1-3 slides in a left pull pin groove 5-5-1 of a left feedback pressing plate 5-5 and a right pull pin groove 5-6-1 of a right feedback pressing plate 5-6, the guide pillar 5-1-4 is arranged between an upper top plate 1-1 of the installation seat 1 and a middle partition plate 1-5, the guide pillar 5-1-4 passes through the reset plate 5-1-1, the pressure spring 5-1-5 is sleeved on one end of a sleeve, the limit retainer 5-1-6 is sleeved on the other end of the guide pillar 5-1-4, and the limit retainer 5-1-4 can slide on the upper plate 5-1-4 and the lower guide pillar 1-4; the trigger frame 5-2 is arranged on the lower bottom plate 1-2 of the mounting seat 1 and is U-shaped, the left feedback pressing plate 5-5 and the right feedback pressing plate 5-5 are symmetrically arranged on the trigger frame 5-2 through the left feedback rotating shaft 5-3 and the right feedback rotating shaft 5-4, and the middle part of the swing plate 2-5 is positioned in a U-shaped groove of the trigger frame 5-2 and is also positioned below the left feedback pressing plate 5-5 and the right feedback pressing plate 5-6; the left energy storage spring 5-7 and the right energy storage spring 5-8 respectively connect the left wedge block component 2-1 and the right wedge block component 2-2 with the left arm and the right arm of the swinging plate 2-5 through the left swinging plate spring hanging column 2-7, the right swinging plate spring hanging column 2-8, the left wedge block spring hanging column 2-1-4 and the right wedge block spring hanging column 2-2-4.
After the safety tongs in this embodiment act, after the left wedge block assembly 2-1 and the right wedge block assembly 2-2 are in contact with the car guide rail, inertia which continues to generate upward displacement still exists, friction force is generated between the left wedge block assembly 2-1 and the right wedge block assembly 2-2 and the car guide rail, when the upper surfaces A of the left wedge block push plate 2-1-3 and the right wedge block push plate 2-2-3 move upwards to be in surface contact with the lower surface B of the reset plate 5-1-1 of the reset assembly 5-1, the wedge block assemblies 2-1 and 2-2 push the reset assembly 5-1 to move upwards, the compression springs 5-1-5 are compressed, the pull rod 5-1-2 drives the left feedback pressing plate 5-5 and the right feedback pressing plate 5-6 to rotate by taking the left feedback rotating shaft 5-3 and the right feedback rotating shaft 5-4 as fulcra, the left feedback pressing plate 5-5, the flanges 5-5-6 of the right feedback pressing plate 5-6 are downwards pressed down, then the swing plate 2-5 is connected with the reset plate 5 and the reset plate 5-1, the right wedge block assembly 2-2-1 and the left wedge block assembly 2-2-7 and the whole energy storage plate 2-8 are restored, and the whole energy storage plate 2-storage groove 2-8 is restored, and the energy storage plate 2-storage groove 2-8 is completed. When the lift car or the counterweight (or the counterweight) is lifted, the wedge assemblies 2-1 and 2-2 are released, at the moment, the energy storage springs 5-7 and 5-8 pull the wedge assemblies 2-1 and 2-2 back to the initial positions to realize resetting, the resetting assembly 5-1 loses the constraint of the wedge assemblies 2-1 and 2-2, and the pressure springs 5-1-5 rebound the resetting assembly 5-1 to the initial positions to complete resetting of the safety tongs.
All mechanisms for storing energy through friction force between the wedge blocks and the guide rails and resetting the wedge block assemblies after releasing the energy storage are all in the protection scope of the patent.
While the preferred embodiments of the present invention have been described in detail, those skilled in the art will appreciate that many modifications are possible in the specific embodiments, and that such modifications are intended to be within the scope of the present invention.
Claims (7)
1. The utility model provides a mechanical type is from weightless safety tongs that resets, includes mount pad, brake mechanism, canceling release mechanical system assemble in on the mount pad, its characterized in that: the reset mechanism comprises an elastic piece, and is connected with the braking mechanism through the elastic piece, so that the elastic piece can store energy when the braking mechanism generates braking action; when the braking mechanism is released, the elastic piece enables the braking mechanism to reset;
the braking mechanism comprises a left wedge block assembly, a right wedge block assembly and a swinging plate; the swinging plate is arranged on a swinging plate rotating shaft, and two ends of the swinging plate rotating shaft are respectively arranged on two sides of the mounting seat; the left side of the swinging plate is connected with the left wedge block assembly, and the right side of the swinging plate is connected with the right wedge block assembly;
the reset mechanism comprises a reset component, a trigger frame, a left feedback rotating shaft, a right feedback rotating shaft, a left feedback pressing plate, a right feedback pressing plate, a left energy storage spring and a right energy storage spring; the reset component is arranged into a bilaterally symmetrical structure and comprises a reset plate, a pull rod, a pull pin, a guide post, a pressure spring and a limiting retainer ring, one end of the pull rod is fixed on a foot of the reset plate by a bolt, a hole for the pull pin to pass through is formed in the other end of the pull rod, the pull pin slides in a left pull pin groove of a left feedback pressing plate and a right pull pin groove of a right feedback pressing plate, the guide post is arranged on a mounting seat, the guide post passes through the reset plate, the pressure spring is sleeved on one end of the guide post, the limiting retainer ring is sleeved on the other end of the guide post, and the reset plate can slide up and down on the guide post; the trigger frame is arranged on the lower bottom plate of the mounting seat and is U-shaped, the left feedback pressing plate and the right feedback pressing plate are symmetrically arranged on the trigger frame through the left feedback rotating shaft and the right feedback rotating shaft, and the middle part of the swing plate is positioned in a U-shaped groove of the trigger frame and is also positioned below the left feedback pressing plate and the right feedback pressing plate; the left energy storage spring and the right energy storage spring respectively connect the left wedge block component and the right wedge block component with the left arm and the right arm of the swinging plate.
2. A mechanical self-resetting weightless safety gear as set forth in claim 1, wherein: the safety tongs are provided with a weightlessness triggering mechanism, and the weightlessness triggering mechanism is in a balanced state in a normal state; and when the weight loss trigger mechanism is abnormal, triggering the braking mechanism to act.
3. A mechanical self-resetting weightless safety gear as claimed in claim 2, wherein: the weightless triggering mechanism comprises a weight (3-5) and a weight connector (3-4), wherein the weight (3-5) is connected to the mounting seat (1) through the weight connector (3-4) and is rotatably mounted on the reset mechanism.
4. A mechanical self-resetting weightless safety gear as set forth in claim 3, wherein: the weight (3-5) comprises a left weight (3-5-1), a right weight (3-5-2) and a weight connecting piece (3-12), wherein the left weight (3-5-1) and the right weight (3-5-2) are symmetrically arranged and are connected through the weight connecting piece (3-12).
5. A mechanical self-resetting weightless safety gear as claimed in claim 1 or 2, wherein: the weightless triggering mechanism comprises a lock hook (3-8), the lock hook (3-8) is rotatably arranged on the reset mechanism, and the lock hook (3-8) clamps the braking mechanism in a normal state; and when the brake mechanism is abnormal, the lock hook (3-8) releases the brake mechanism, and the brake mechanism generates brake action.
6. A mechanical self-resetting weightless safety gear as set forth in claim 1, wherein: the safety tongs are provided with an electromagnetic control mechanism, and the electromagnetic control mechanism is in a static state in a normal state; and when the weight loss trigger mechanism is abnormal, the electromagnetic control mechanism triggers the braking mechanism to act.
7. A mechanical self-resetting weight loss safety tongs as in claim 6 wherein: the electromagnetic control mechanism comprises an electromagnet (4-1), an electromagnet fixing seat (4-2) and an electromagnet pushing plate (4-3), wherein the electromagnet (4-1) is installed on the installation seat (1) through the electromagnet fixing seat (4-2), and the electromagnet pushing plate (4-3) is arranged at the ejection end of the electromagnet (4-1).
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| CN201710393316.5A CN108928709B (en) | 2017-05-27 | 2017-05-27 | Mechanical self-resetting weightless safety tongs |
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| CN108928709B true CN108928709B (en) | 2024-04-12 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111824883B (en) * | 2019-04-15 | 2022-01-11 | 杭州沪宁电梯部件股份有限公司 | Diagnosis maintenance system based on elevator car |
| CN112265886B (en) * | 2020-11-25 | 2022-04-01 | 广东省特种设备检测研究院梅州检测院 | Elevator alarm device based on Internet of things |
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| CN108928709A (en) | 2018-12-04 |
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