CN111380643A - Static braking force detection device for safety gear - Google Patents
Static braking force detection device for safety gear Download PDFInfo
- Publication number
- CN111380643A CN111380643A CN201811633554.XA CN201811633554A CN111380643A CN 111380643 A CN111380643 A CN 111380643A CN 201811633554 A CN201811633554 A CN 201811633554A CN 111380643 A CN111380643 A CN 111380643A
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- Prior art keywords
- guide rail
- constant
- driving
- elevator guide
- braking force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention relates to a static braking force detection device for safety tongs, wherein the safety tongs are provided with a braking plate and a movable eccentric wheel which are arranged at intervals and form a clamping gap, the detection device comprises a detection support, a constant-speed driving mechanism, an elevator guide rail, a test bench and a reset trigger piece, the constant-speed driving mechanism is arranged on the detection support, the test bench is fixedly provided with the safety tongs to be tested, the reset trigger piece is arranged on the detection support, the constant-speed driving mechanism is positioned above the test bench and can lift at a constant speed along the vertical direction, a tension sensor is arranged on a constant-speed drive, one end of the elevator guide rail is fixedly connected with the tension sensor, the other end of the elevator guide rail extends into the clamping gap, and the reset. Compared with the prior art, the invention can monitor and analyze the static braking force of the safety gear, has reliable test data, convenient detection and the like.
Description
Technical Field
The invention belongs to the technical field of key parts of elevators, and relates to a static braking force detection device for safety tongs.
Background
Safety tongs are the safety arrangement of elevator. The elevator safety gear device is a safety device which emergently stops a car and clamps the car on a guide rail under the operation of a speed limiter when the speed of an elevator exceeds the set limit speed of the speed limiter of the elevator or in the case of breakage and looseness of a suspension rope. In order to ensure the safety and reliability of safety gear products, the static braking force of the produced safety gears needs to be detected and evaluated, and at present, a suitable device for detecting the static braking force of batch safety gears is lacked.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a static braking force detection device for safety tongs.
The purpose of the invention can be realized by the following technical scheme:
the detection device comprises a detection support, a constant-speed driving mechanism, an elevator guide rail, a test board and a reset trigger piece, wherein the constant-speed driving mechanism, the elevator guide rail, the test board and the reset trigger piece are arranged on the detection support, the test board is fixedly provided with the safety tongs to be tested, the constant-speed driving mechanism is positioned above the test board and can lift along the vertical direction at a constant speed, a tension sensor is arranged on a constant-speed drive, one end of the elevator guide rail is fixedly connected with the tension sensor, the other end of the elevator guide rail extends into the clamping gap, and the reset trigger piece is connected with the eccentric wheel and is used for driving the eccentric wheel to move and press the elevator guide rail.
Furthermore, the uniform-speed driving mechanism comprises a guide rail vertically arranged on the detection support, a driving platform which is installed on the guide rail and can move up and down along the guide rail, and a driving piece which is connected with the driving platform and used for driving the driving platform to move up and down at a uniform speed, wherein the tension sensor is fixedly installed on the driving platform.
Furthermore, the driving piece comprises a driving motor located at the top end of the detection support and a transmission rod vertically arranged and connected with the driving platform in a threaded mode, and the top end of the transmission rod is in transmission connection with the output end of the driving motor through a transmission belt.
Furthermore, a clamping piece used for fixedly clamping the top end of the elevator guide rail is arranged on the tension sensor.
Furthermore, the clamping piece is provided with two clamping blocks at intervals, the gap width of the two clamping blocks is not less than the thickness of the elevator guide rail, the clamping blocks are also provided with laterally through locking holes, and the locking holes are internally threaded and used for abutting against and fixing locking studs of the elevator guide rail.
Furthermore, the reset trigger piece comprises a reset trigger cylinder which is fixedly installed beside the test board and can be driven up and down, and a connecting rod of a piston rod of the reset trigger cylinder, wherein the middle part of the reset trigger cylinder is hinged, one end of the connecting rod is provided with a roller tightly attached to the side wall of the detection support, and the other end of the connecting rod is hinged with a connecting piece used for fixedly connecting the eccentric wheel.
Further, still be equipped with the controller on the detection support, the controller still connects force sensor and trigger that resets.
Compared with the prior art, the invention has the following advantages:
(1) the invention is provided with the reset trigger piece to control the safety gear to clamp the elevator guide rail, then the constant-speed driving mechanism is utilized to drive the elevator guide rail to overcome the friction force generated by the safety gear to move, and finally the tension sensor which is fixed on the constant-speed driving mechanism and is connected with the elevator guide rail is utilized to conveniently monitor the friction force condition generated by the safety gear to the elevator guide rail in the whole working process, thereby effectively detecting and evaluating the static braking condition of the safety gear.
(2) The constant-speed driving mechanism adopts a driving motor and is matched with a gear and a transmission rod driven by threads to drive the driving platform at a constant speed, and the control is stable and reliable.
(3) The idler wheel and the connecting piece which are respectively arranged at the two ends of the connecting rod on the reset triggering piece can be used for adaptively adjusting the driving connection between the idler wheel and the connecting piece and the safety tongs, so that the installation requirement of the reset triggering cylinder is reduced, and the abrasion of the driving process of the reset triggering piece on the safety tongs is also reduced.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
the notation in the figure is:
1-detection bracket, 2-constant speed driving mechanism, 21-transmission belt, 22-transmission rod, 23-driving platform, 24-tension sensor, 25-clamping piece, 26-driving motor, 3-elevator guide rail, 4-test bench, 5-reset trigger piece, 51-reset trigger cylinder, 52-connecting rod, 53-connecting piece, 54-roller, 6-safety clamp, 61-eccentric wheel and 62-brake plate.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
A static braking force detection device for a safety gear is structurally shown in figures 1 and 2, the safety gear 6 is provided with a braking plate 62 and a movable eccentric wheel 61 which are arranged at intervals and form a clamping gap, the detection device comprises a detection support 1, a constant-speed driving mechanism 2 arranged on the detection support 1, an elevator guide rail 3, a test bench 4 fixedly provided with the safety gear 6 to be tested, and a reset trigger 5, wherein the constant-speed driving mechanism 2 is positioned above the test bench 4 and can lift at a constant speed along the vertical direction, a tension sensor 24 is arranged on the constant-speed driving mechanism, one end of the elevator guide rail 3 is fixedly connected with the tension sensor 24, the other end of the elevator guide rail 3 extends into the clamping gap, and the reset trigger 5 is connected with the eccentric wheel 61 and used for driving the eccentric wheel 61 to move.
Referring to fig. 1 again, the constant speed driving mechanism 2 includes a guide rail vertically disposed on the detection support 1, a driving platform 23 installed on the guide rail and capable of moving up and down along the guide rail, and a driving member connected to the driving platform 23 and used for driving the driving platform to move up and down at a constant speed, a tension sensor 24 is fixedly installed on the driving platform 23, the driving member includes a driving motor 26 located at the top end of the detection support 1, and a transmission rod 22 vertically disposed and in threaded connection with the driving platform 23, and the top end of the transmission rod 22 is in transmission connection with the output end of the driving motor 26 through a transmission belt 21.
Referring to fig. 1 again, the tension sensor 24 is provided with a clamping member 25 for fixedly clamping the top end of the elevator guide rail 3, the clamping member 25 is provided with two clamping blocks at intervals, the gap width of the two clamping blocks is not less than the thickness of the elevator guide rail 3, the clamping blocks are further provided with laterally through locking holes, and the locking holes are further provided with locking studs for abutting against and fixing the elevator guide rail 3 in a threaded manner.
Referring to fig. 1 again, the reset triggering member 5 includes a reset triggering cylinder 51 fixedly installed near the test platform 4 and capable of driving up and down, and a connecting rod 52 with a piston rod hinged to the reset triggering cylinder 51 at the middle, one end of the connecting rod 52 is provided with a roller 54 tightly attached to the side wall of the detection bracket 1, and the other end is hinged to a connecting member 53 for fixedly connecting the eccentric wheel 61.
In this embodiment, the detection bracket 1 is further provided with a controller, and the controller is further connected with the tension sensor 24 and the reset trigger 5.
The process of the detection device of the embodiment specifically refers to the following:
when the detection is started, the safety gear 6 is fixedly arranged on the test bench 4, the elevator guide rail 3 fixed on the tension sensor 24 is arranged between the braking plate 62 and the eccentric wheel 61 of the safety gear 6, then the reset trigger cylinder 51 is driven to drive the connecting rod 52 to move upwards, and further the eccentric wheel 61 is driven to be attached to the braking plate 62, so that the guide rail and the braking piece consisting of the eccentric wheel 61 and the braking plate 62 have initial braking force, meanwhile, under the driving of the uniform-speed driving mechanism 2, the tension sensor 24 drives the elevator guide rail 3 to integrally move upwards, and when the detected tension value reaches a set value, the reset trigger 5 stops running, so that the eccentric wheel 61 and the braking plate 62 lock the guide rail. Continuously pulling the elevator guide rail 3 to move upwards at a constant speed, and synchronously monitoring the change condition of the friction force generated by the braking part and the elevator guide rail 3. Based on this, this device can effectively monitor whether safety tongs 6 can satisfy theoretical frictional force demand under static condition.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (7)
1. The static braking force detection device for the safety tongs is characterized by comprising a detection support, a constant-speed driving mechanism, an elevator guide rail, a test board and a reset trigger, wherein the constant-speed driving mechanism, the elevator guide rail, the test board and the reset trigger are arranged on the detection support, the test board is fixedly provided with the safety tongs to be tested, the constant-speed driving mechanism is positioned above the test board and can lift along the vertical direction at a constant speed, a tension sensor is arranged on a constant-speed drive, one end of the elevator guide rail is fixedly connected with the tension sensor, the other end of the elevator guide rail extends into the clamping gap, and the reset trigger is connected with the eccentric wheel and is used for driving the eccentric wheel to move and compress the elevator guide rail.
2. The static braking force detection device for the safety gear according to claim 1, wherein the constant speed driving mechanism comprises a guide rail vertically arranged on the detection support, a driving platform installed on the guide rail and capable of moving up and down along the guide rail, and a driving member connected with the driving platform and used for driving the driving platform to move up and down at a constant speed, and the tension sensor is fixedly installed on the driving platform.
3. The static braking force detection device for the safety gear according to claim 2, wherein the driving member comprises a driving motor located at the top end of the detection bracket, and a transmission rod vertically arranged and in threaded connection with the driving platform, and the top end of the transmission rod is in transmission connection with the output end of the driving motor through a transmission belt.
4. The static braking force detection apparatus for safety tongs according to claim 1, wherein the tension sensor is provided with a clamp for fixedly clamping the top end of the elevator guide rail.
5. The static braking force detection device for safety tongs according to claim 4, characterized in that the clamping member is provided with two clamping blocks at intervals, the gap width of the two clamping blocks is not less than the thickness of the elevator guide rail, the clamping blocks are further provided with laterally penetrating locking holes, and the locking holes are further threaded for abutting against locking studs for fixing the elevator guide rail.
6. The static braking force detection device for safety tongs according to claim 1, wherein the reset trigger comprises a reset trigger cylinder fixedly installed beside the test platform and capable of being driven up and down, and a connecting rod hinged to a piston rod of the reset trigger cylinder at the middle part, one end of the connecting rod is provided with a roller tightly attached to the side wall of the test bracket, and the other end of the connecting rod is hinged to a connecting piece for fixedly connecting the eccentric wheel.
7. The static braking force detection device for the safety gear according to claim 1, wherein the detection bracket is further provided with a controller, and the controller is further connected with the tension sensor and the reset trigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633554.XA CN111380643A (en) | 2018-12-29 | 2018-12-29 | Static braking force detection device for safety gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633554.XA CN111380643A (en) | 2018-12-29 | 2018-12-29 | Static braking force detection device for safety gear |
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| Publication Number | Publication Date |
|---|---|
| CN111380643A true CN111380643A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811633554.XA Pending CN111380643A (en) | 2018-12-29 | 2018-12-29 | Static braking force detection device for safety gear |
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| CN (1) | CN111380643A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284905A (en) * | 2020-12-29 | 2021-01-29 | 中铁科学研究院有限公司 | Concrete detection device and method |
-
2018
- 2018-12-29 CN CN201811633554.XA patent/CN111380643A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284905A (en) * | 2020-12-29 | 2021-01-29 | 中铁科学研究院有限公司 | Concrete detection device and method |
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