CN210558728U - Speed limiter - Google Patents
Speed limiter Download PDFInfo
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- CN210558728U CN210558728U CN201920724611.9U CN201920724611U CN210558728U CN 210558728 U CN210558728 U CN 210558728U CN 201920724611 U CN201920724611 U CN 201920724611U CN 210558728 U CN210558728 U CN 210558728U
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Abstract
The utility model discloses a speed limiter. The governor is used in an elevator system that includes a wire rope connected in tension to the governor. The speed limiter comprises a mounting frame, a central shaft, an automatic reset switch assembly, a braking assembly, a speed-limiting rope wheel, a ratchet wheel assembly and a safety hammer assembly, wherein the central shaft and the automatic reset switch assembly are mounted on the mounting frame, and the speed-limiting rope wheel and the ratchet wheel assembly are rotatably connected to the central shaft. The brake assembly is mounted on the mounting frame and connected to the ratchet assembly, and the speed-limiting rope wheel rotates under the driving of the steel wire rope. The speed limiter further comprises a testing assembly installed on the installation frame, the testing assembly protrudes according to a control signal, part of the safety hammer assembly rotates along with the speed limiting rope wheel until the speed limiting rope wheel touches the testing assembly, and the safety hammer assembly rotates and is clamped on the ratchet wheel assembly. The test component moves according to the control signal to trigger the safety hammer component to be clamped on the ratchet wheel component, and the maintenance is convenient.
Description
Technical Field
The invention relates to the technical field of elevators, in particular to a speed limiter.
Background
The speed limiter is one of the most important devices in the safe running of the elevator, and monitors and controls the speed of the elevator car at any time. When the car moves and an over-speed condition occurs, the speed limiter can send out signals in time, and then mechanical action is generated to cut off a power supply circuit or drive safety tongs to brake the car forcibly. When the elevator is overspeed, runs out of control or the suspension device is broken, the speed limiter and the safety gear device rapidly stop the elevator car on the guide rail and keep a static state, thereby avoiding casualties and equipment damage accidents. The speed limiter is a command sender, the safety tongs are an executor, and the safety operation of the elevator is guaranteed by the combined action of the speed limiter and the safety tongs.
The type test of the speed limiter and the safety tongs is carried out in the production process of the elevator, and the performance requirements can be met, but the safety technical performance of the elevator depends on the design and manufacture quality and the installation and debugging quality to a great extent. Particularly, after the elevator is used for a period of time, the speed limiter and the safety gear device can cause parameter change or function reduction, loss and the like due to abrasion, corrosion, fatigue and the like. Therefore, the field detection of the safety tongs of the elevator speed limiter is particularly important, and the safety tongs are an important link for elevator safety management. The existing speed limiter is not provided with a structure for controlling the running of the speed limiter during maintenance, and the use safety of the speed limiter cannot be simulated.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a speed limiter.
In order to achieve the above object, a first aspect of the present disclosure is: a speed limiter is applied to an elevator system, the elevator system comprises a steel wire rope connected to the speed limiter in a tensioning mode, the speed limiter comprises a mounting frame, a central shaft, an automatic reset switch assembly, a brake assembly, a speed limiting rope wheel, a ratchet assembly and a safety hammer assembly rotatably connected to the speed limiting rope wheel, the central shaft and the automatic reset switch assembly are mounted on the mounting frame, the speed limiting rope wheel and the ratchet assembly are rotatably connected to the central shaft, the brake assembly is mounted on the mounting frame and connected to the ratchet assembly, and the speed limiting rope wheel rotates under the driving of the steel wire rope;
the speed limiter further comprises a testing assembly arranged on the mounting frame, the testing assembly protrudes according to a control signal, part of the safety hammer assembly rotates along with the speed limiting rope wheel until the safety hammer assembly touches the testing assembly, and the safety hammer assembly rotates and is clamped on the ratchet wheel assembly;
when the rotating speed of the speed-limiting rope wheel exceeds a preset value, the safety hammer component rotates under the action of the rotating centrifugal force of the speed-limiting rope wheel and triggers the automatic reset switch component, and the automatic reset switch component sends an electric signal to cut off a safety loop of an elevator system; meanwhile, the safety hammer component is clamped on the ratchet wheel component and pushes the ratchet wheel component to rotate;
the braking component is clamped on the speed limiting rope wheel under the driving of the ratchet component, so that the steel wire rope slides relative to the speed limiting rope wheel.
Optionally, the automatic reset switch assembly includes a reset switch mounted on the mounting frame and a trigger rod connected to the reset switch, and the trigger rod protrudes toward the central axis.
Optionally, the safety hammer assembly comprises a main body part rotatably connected to the speed-limiting rope wheel, a pawl convexly arranged on the main body part, and a trigger part, when the rotating speed of the speed-limiting rope wheel exceeds a preset value, the pawl is clamped on the ratchet wheel assembly, and the trigger part pushes and triggers the automatic reset switch assembly.
Optionally, the safety hammer assembly further comprises a positioning portion protruding from the main body portion, and the positioning portion touches the test assembly when the test assembly protrudes.
Optionally, the braking assembly comprises a pull rod, a braking component connected to the pull rod and a spring component, the spring component is elastically abutted to the braking component, the pull rod moves under the driving of the ratchet assembly, and the braking component is clamped on the speed limiting rope wheel.
Optionally, the braking member is sleeved on the pull rod.
Optionally, the brake member comprises a box-shaped plate and a brake block attached to the box-shaped plate, the box-shaped plate being connected to the drawbar.
Optionally, the testing assembly comprises a solenoid valve and a guide plate mounted on the solenoid valve, and the solenoid valve pushes the guide plate to linearly reciprocate.
After adopting the structure, compared with the prior art, the invention has the advantages that:
under the maintenance state, the test component moves according to the control signal to trigger the safety hammer component to be clamped on the ratchet wheel component, so that the speed-limiting rope wheel is controlled to stop rotating, the maintenance is convenient, and the safety detection of the speed limiter is accurate. The safety hammer component can be clamped on the ratchet wheel component in a maintenance state or a speed-limiting rope wheel overspeed rotation state, and the safety is good.
Drawings
The invention is further illustrated with reference to the following figures and examples:
fig. 1 is a schematic diagram of the governor of the present invention in a normal operating configuration.
FIG. 2 is a schematic view of the ratchet assembly with the pawl held in the overspeed condition of the present invention.
Fig. 3 is a side view schematic of the governor of the present invention.
In the figure: a mounting frame 10; a speed-limiting sheave 20; a central shaft 30; a ratchet assembly 40; an automatic reset switch assembly 50; a reset switch 51; a trigger lever 52; a brake assembly 60; a pull rod 61; a spring member 62; a stopper 63; a box-shaped plate 631; a brake pad 632; a safety hammer assembly 70; a main body portion 71; a pawl 72; a trigger section 73; a positioning portion 74; a test assembly 80; a solenoid valve 81; and a guide plate 82.
Detailed Description
The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.
Examples, see fig. 1 and 2: the governor is used in an elevator system that includes a wire rope connected in tension to the governor. The governor includes a mounting bracket 10, a center shaft 30, an automatic reset switch assembly 50, a brake assembly 60, a speed limiting sheave 20, a ratchet assembly 40, and a safety hammer assembly 70 rotatably connected to the speed limiting sheave 20. The center shaft 30 and the automatic reset switch assembly 50 are mounted to the mounting bracket 10, and the speed limiting sheave 20 and the ratchet assembly 40 are rotatably coupled to the center shaft 30. The brake assembly 60 is mounted to the mounting bracket 10 and connected to the ratchet assembly 40, and the speed limiting sheave 20 is rotated by the wire rope.
The speed limiter further comprises a testing component 80 installed on the installation frame 10, the testing component 80 protrudes according to a control signal, part of the safety hammer component 70 rotates along with the speed limiting rope wheel 20 until the testing component 80 is touched, and the safety hammer component 70 rotates and is clamped on the ratchet component 40.
When the rotation speed of the speed limiting sheave 20 exceeds a preset value, the safety hammer assembly 70 rotates under the action of the rotational centrifugal force of the speed limiting sheave 20 and triggers the automatic reset switch assembly 50, and the automatic reset switch assembly 50 sends an electric signal to cut off the safety loop of the elevator system. If the elevator continues to overspeed, the safety hammer assembly 70 catches on the ratchet assembly 40 and pushes the ratchet assembly 40 to rotate. The brake assembly 60 is clamped to the governor sheave 20 under the driving of the ratchet assembly 40 to slip the wire rope relative to the governor sheave 20.
The test component 80 can perform extending or retracting actions according to the control signals, the requirement on the rotating speed of the speed limiting rope wheel 20 is less limited, namely the speed limiter can be controlled to perform the action requirement of locking the steel wire rope without entering an overspeed rotating state, and the test component is convenient to overhaul, maintain and maintain. In the maintenance state, the test component 80 moves according to the control signal to trigger the safety hammer component 70 to be clamped on the ratchet wheel component 40, so that the speed limiting rope wheel 20 is controlled to stop rotating, the maintenance is convenient, and the safety detection of the speed limiter is accurate. The safety hammer assembly 70 can be clamped on the ratchet assembly 40 in a maintenance state or an overspeed rotation state of the speed limiting rope wheel 20, and the safety is good. The steel wire rope is connected to the safety gear assembly, when the speed-limiting rope wheel 20 stops rotating under the action of the braking force of the braking assembly 60, the steel wire rope slips relative to the speed-limiting rope wheel 20 and drives the safety gear assembly to act, and the safety gear assembly is clamped on the guide rail to stop the lift car from moving.
Alternatively, the testing assembly 80 includes a solenoid valve 81 and a guide plate 82 installed on the solenoid valve 81, and the solenoid valve 81 pushes the guide plate 82 to linearly reciprocate. The solenoid valve 81 operates upon receiving a control signal to push the guide plate 82 to protrude inward, and the guide plate 82 comes within the rotational range of the safety hammer assembly 70. The speed-limiting rope wheel 20 drives the safety hammer assembly 70 to rotate to the testing assembly 80, one part of the safety hammer assembly 70 touches the guide plate 82 to rotate the safety hammer assembly 70, the safety hammer assembly 70 is clamped on the ratchet assembly 40, and then the braking assembly 60 is driven to operate through the ratchet assembly 40. The testing component 80 has good controllability and convenient operation.
See fig. 2 and 3 for illustration: alternatively, the automatic reset switch assembly 50 includes a reset switch 51 mounted to the mounting bracket 10 and a trigger lever 52 connected to the reset switch 51, the trigger lever 52 protruding toward the center shaft 30. The triggering lever 52 protrudes toward the center shaft 30, and the safety hammer assembly 70 is spaced apart from the triggering lever 52 by a corresponding distance when the car is normally operated. When the car runs at an overspeed, the safety hammer assembly 70 protrudes under centrifugal force and touches the trigger lever 52 to cause the reset switch 51 to send an electrical signal. The reset switch 51 sends an electric signal to the elevator system to control the hoisting machine and other devices to stop operating. The detection is sensitive, and the speed limiting effect is good.
Alternatively, the safety hammer assembly 70 includes a main body 71 rotatably connected to the speed limiting sheave 20, a pawl 72 protruded from the main body 71, and a triggering portion 73, wherein when the rotation speed of the speed limiting sheave 20 exceeds a preset value, the pawl 72 is caught by the ratchet assembly 40, and the triggering portion 73 pushes and triggers the automatic reset switch assembly 50. Optionally, the safety hammer assembly 70 further includes a positioning portion 74 protruding from the main body portion 71, and the positioning portion 74 touches the testing assembly 80 when the testing assembly 80 protrudes. Alternatively, the triggering portion 73 is provided as an adjusting bolt screwed to the main body portion 71, which facilitates adjustment of the triggering distance between the triggering portion 73 and the triggering lever 52.
The pawls 72 and the trigger 73 are located on both sides of the main body 71, and the main body 71 is mounted to the governor sheave 20 by a pin. Wherein, when the safety hammer assembly 70 is subjected to a centrifugal force, the trigger 73 is rotated outward in a radial direction of the speed limiting sheave 20, and the pawl 72 is projected inward in the radial direction of the speed limiting sheave 20. The teeth of ratchet assembly 40 project radially outwardly and the radius of rotation of pawl 72 is greater than the radius of rotation of ratchet assembly 40.
See fig. 1 and 2 for illustration: optionally, the braking assembly 60 includes a pull rod 61, a braking member 63 connected to the pull rod 61, and a spring member 62, the spring member 62 elastically abuts against the braking member 63, the pull rod 61 is driven by the ratchet assembly 40 to move, and the braking member 63 is clamped to the speed limiting sheave 20. Optionally, the brake 63 is sleeved on the pull rod 61. Alternatively, the brake 63 includes a box-shaped plate 631 and a brake block 632 attached to the box-shaped plate 631, the box-shaped plate 631 being connected to the tie bar 61.
The pull rod 61 includes a rod body and a rod body sleeved on the rod body, and the rod body is rotatably connected to the ratchet assembly 40 and can rotate relative to the ratchet assembly 40. The braking member 63 is sleeved on the guide rod portion, the spring member 62 is sleeved on the guide rod portion, one end of the spring member 62 is elastically abutted against the braking member 63, and the other end of the spring member 62 is limited on the guide rod portion. When the ratchet assembly 40 rotates, the pull rod 61 rotates along with the ratchet assembly 40 and drives the spring element 62 to move, and the braking element 63 is pushed by the elastic force of the spring element 62 to be extruded on the speed-limiting rope pulley 20, so that the braking effect is good.
The structure of the speed limiter is widely used at present, and other structures and principles are the same as those in the prior art, so that the detailed description is omitted.
Claims (8)
1. A speed limiter is applied to an elevator system, the elevator system comprises a steel wire rope connected with the speed limiter in a tensioning mode, and the speed limiter is characterized by comprising a mounting frame, a central shaft, an automatic reset switch assembly, a brake assembly, a speed limiting rope wheel, a ratchet assembly and a safety hammer assembly rotatably connected with the speed limiting rope wheel, wherein the central shaft and the automatic reset switch assembly are mounted on the mounting frame, the speed limiting rope wheel and the ratchet assembly are rotatably connected with the central shaft, the brake assembly is mounted on the mounting frame and connected with the ratchet assembly, and the speed limiting rope wheel rotates under the driving of the steel wire rope;
the speed limiter further comprises a testing assembly arranged on the mounting frame, the testing assembly protrudes according to a control signal, part of the safety hammer assembly rotates along with the speed limiting rope wheel until the safety hammer assembly touches the testing assembly, and the safety hammer assembly rotates and is clamped on the ratchet wheel assembly;
when the rotating speed of the speed-limiting rope wheel exceeds a preset value, the safety hammer component rotates under the action of the rotating centrifugal force of the speed-limiting rope wheel and triggers the automatic reset switch component, and the automatic reset switch component sends an electric signal to cut off a safety loop of an elevator system; meanwhile, the safety hammer component is clamped on the ratchet wheel component and pushes the ratchet wheel component to rotate;
the braking component is clamped on the speed limiting rope wheel under the driving of the ratchet component, so that the steel wire rope slides relative to the speed limiting rope wheel.
2. The governor of claim 1, wherein the automatic reset switch assembly includes a reset switch mounted to the mounting bracket and a trigger lever connected to the reset switch, the trigger lever projecting in the direction of the central axis.
3. The speed governor of claim 1, wherein the safety hammer assembly comprises a body portion rotatably connected to the speed limiting sheave, a pawl protruding from the body portion, and a trigger portion, wherein when the speed of the speed limiting sheave exceeds a predetermined value, the pawl is retained by the ratchet assembly, and the trigger portion pushes and triggers the automatic reset switch assembly.
4. The governor of claim 3, wherein the safety hammer assembly further comprises a locating portion protruding from the main body portion that contacts the test assembly when the test assembly is protruding.
5. The speed governor of claim 1, wherein the braking assembly comprises a pull rod, a braking member connected to the pull rod, and a spring member resiliently abutting the braking member, the pull rod being driven by the ratchet assembly to move, the braking member being clamped to the speed limiting sheave.
6. The governor of claim 5, wherein the braking member is sleeved to the pull rod.
7. The governor of claim 5, wherein the brake comprises a box plate and a brake block secured to the box plate, the box plate being connected to the tie bar.
8. The governor of claim 1, wherein the test assembly includes a solenoid valve and a guide plate mounted to the solenoid valve, the solenoid valve urging the guide plate to reciprocate linearly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920724611.9U CN210558728U (en) | 2019-05-20 | 2019-05-20 | Speed limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920724611.9U CN210558728U (en) | 2019-05-20 | 2019-05-20 | Speed limiter |
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| Publication Number | Publication Date |
|---|---|
| CN210558728U true CN210558728U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920724611.9U Active CN210558728U (en) | 2019-05-20 | 2019-05-20 | Speed limiter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110203790A (en) * | 2019-05-20 | 2019-09-06 | 宁波申菱机电科技股份有限公司 | Limiter of speed |
| CN110203790B (en) * | 2019-05-20 | 2024-09-27 | 宁波申菱机电科技股份有限公司 | Speed Limiter |
-
2019
- 2019-05-20 CN CN201920724611.9U patent/CN210558728U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110203790A (en) * | 2019-05-20 | 2019-09-06 | 宁波申菱机电科技股份有限公司 | Limiter of speed |
| CN110203790B (en) * | 2019-05-20 | 2024-09-27 | 宁波申菱机电科技股份有限公司 | Speed Limiter |
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