CN109470384B - Output force measuring and calibrating device of double-path brake actuator - Google Patents
Output force measuring and calibrating device of double-path brake actuator Download PDFInfo
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- CN109470384B CN109470384B CN201811326816.8A CN201811326816A CN109470384B CN 109470384 B CN109470384 B CN 109470384B CN 201811326816 A CN201811326816 A CN 201811326816A CN 109470384 B CN109470384 B CN 109470384B
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- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
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Abstract
A double-path brake actuator output force measurement calibration device relates to the field of brake actuator design; the device comprises a brake actuator, a support sleeve, 2 ball head cap assemblies, 2S-shaped force sensors, 4 guide strips and a base; wherein, the base is a horizontally placed plate-shaped structure; the supporting sleeve is axially and vertically fixedly arranged at the center of the upper surface of the base; the 4 guide strips are symmetrically arranged on two sides of the supporting sleeve in a pairwise group; and 4 guide strips are fixedly arranged on the upper surface of the base; the 2S-shaped force sensors are symmetrically arranged on two sides of the supporting sleeve; and the S-shaped force cell is clamped between 2 guide bars in each group of guide bars; the 2 ball head cap components are respectively and fixedly arranged at the tops of the 2S-shaped force sensors; the brake actuator is arranged at the top of the support sleeve; the invention ensures the safety of the tested brake actuator and the accuracy of output force calibration, and simultaneously considers the calibration efficiency.
Description
Technical Field
The invention relates to the field of brake actuator design, in particular to a double-path brake actuator output force measurement calibration device.
Background
The brake system mainly comprises a brake disc and a force servo actuator (brake actuator), wherein the actuator applies actuating force to the brake disc through the extension and retraction of an actuating cylinder, and the force is collected and processed by a force sensor in the actuator and then output to a controller, so that the brake force servo control is realized. The force sensor plays a crucial role and directly determines the accuracy of the output force of the brake system.
In the equipment requiring high reliability, the braking system mostly adopts dual-redundancy configuration, namely two force servo actuators with the same function are provided, so that the braking system can still continue to work when one of the force servo actuators is damaged, and the reliability of the system is improved.
Generally, the brake actuators need to be calibrated periodically to ensure accuracy. The conventional brake actuator calibration system mainly has two problems: firstly, a one-by-one calibration mode is mostly adopted, and the one-by-one calibration efficiency is low; secondly, the action surface and the measuring point are mostly in point-surface contact or surface-surface contact, wherein the point-surface contact does not form additional bending moment but can cause damage to the action surface of the actuator, the surface-surface contact can protect the action surface but can form additional bending moment to act on the actuator, and the actuator is adversely affected when the bending moment is large.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides the double-path brake actuator output force measuring and calibrating device, ensures the safety of the measured brake actuator and the accuracy of output force calibration, and simultaneously considers the calibration efficiency.
The above purpose of the invention is realized by the following technical scheme:
a double-path brake actuator output force measurement calibration device comprises a brake actuator, a support sleeve, 2 ball head cap assemblies, 2S-shaped force sensors, 4 guide strips and a base; wherein, the base is a horizontally placed plate-shaped structure; the supporting sleeve is axially and vertically fixedly arranged at the center of the upper surface of the base; the 4 guide strips are symmetrically arranged on two sides of the supporting sleeve in a pairwise group; and 4 guide strips are fixedly arranged on the upper surface of the base; the 2S-shaped force sensors are symmetrically arranged on two sides of the supporting sleeve; and the S-shaped force cell is clamped between 2 guide bars in each group of guide bars; the 2 ball head cap components are respectively and fixedly arranged at the tops of the 2S-shaped force sensors; the brake actuator is arranged at the top of the support sleeve.
In the device for measuring and calibrating the output force of the double-path brake actuator, the 4 guide strips are all arranged in parallel to the long edge of the base; the S-shaped force transducer is translated between each group of guide strips along the axial direction of the guide strips, so that the contact position of the S-shaped force transducer and the brake actuator is adjusted.
In the device for measuring and calibrating the output force of the double-path brake actuator, the brake actuator is of a disc-shaped structure; two ends of the lower surface of the brake actuator correspond to the positions of the S-shaped force sensors and are respectively provided with 2 actuating rods.
In the device for measuring and calibrating the output force of the two-way brake actuator, the axial top of the S-shaped force sensor is provided with a threaded hole; the ball head cap assembly axially extends into a threaded hole of the S-shaped force sensor; the ball head cap assembly is in threaded fit with the S-shaped force transducer.
In the above two-way brake actuator output force measurement calibration device, the ball head cap assembly comprises a cap frame, a cap and a dowel bar; wherein, the cap frame is a concave structure with a through hole at the bottom; the dowel bar axially penetrates through the through hole of the cap frame from top to bottom and extends into the threaded hole of the S-shaped force transducer; the cap is fixedly arranged at the top of the dowel bar; the inner side wall of the cap frame is fixedly connected with the outer side wall of the cap through thread matching.
In the device for measuring and calibrating the output force of the double-path brake actuator, the top of the dowel bar is of a ball head structure; the lower surface of the cap is concave and arc-shaped, and the shape of the arc-shaped surface corresponds to that of a dowel bar ball head; the upper surface of the cap is of a plane structure.
In the above two-way brake actuator output force measurement calibration device, the dowel bar is in threaded connection with the S-shaped force transducer to realize vertical height adjustment.
In the aforementioned calibration device for measuring the output force of the two-way brake actuator, the measurement process of the calibration device is as follows:
the brake actuator moves vertically downwards; 2 actuating rods output pressure downwards; the bottom plane of the actuating rod is in contact with the upper surface of the cap, and pressure is transmitted to the S-shaped force measuring sensor through the dowel bar, so that measurement is realized.
Compared with the prior art, the invention has the following advantages:
(1) the invention can simultaneously measure and calibrate the two linear pressure force servo actuators, thereby improving the calibration efficiency;
(2) the invention adopts a ball head cap type measuring scheme, realizes surface-to-surface contact between the actuator and a measuring part and avoids the influence on the bending moment of the actuator;
(3) the adjustable measuring point structure is convenient to adjust and high in usability.
Drawings
FIG. 1 is a schematic view of a measurement calibration apparatus according to the present invention;
fig. 2 is a cross-sectional view of the ball cap assembly of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples: a
The invention provides a double-path brake actuator output force measuring and calibrating device, which ensures the safety of a tested brake actuator and the accuracy of output force calibration and also considers the calibration efficiency.
As shown in fig. 1, which is a schematic view of a measurement calibration device, it can be known that the two-way brake actuator output force measurement calibration device comprises a brake actuator 1, a support sleeve 2, 2 ball cap assemblies 3, 2S- shaped force sensors 4, 4 guide strips 5 and a base 6; wherein, the base 6 is a horizontally placed plate-shaped structure; the supporting sleeve 2 is axially vertically and fixedly arranged at the center of the upper surface of the base 6; the 4 guide strips 5 are symmetrically arranged on two sides of the supporting sleeve 2 in pairs; and 4 guide bars 5 are fixedly arranged on the upper surface of the base 6; the 2S-shaped force sensors 4 are symmetrically arranged on two sides of the supporting sleeve 2; and the S-shaped force cell 4 is sandwiched between 2 guide bars 5 in each group of guide bars 5; the 2 ball head cap assemblies 3 are respectively and fixedly arranged at the tops of the 2S-shaped force sensors 4; the brake actuator 1 is mounted on top of the support sleeve 2.
Wherein, the 4 guide strips 5 are all arranged in parallel with the long edge of the base 6; the S-shaped force measuring sensors 4 axially translate between each group of guide strips 5 along the guide strips 5, so that the contact positions of the S-shaped force measuring sensors 4 and the brake actuator 1 are adjusted. The brake actuator 1 is of a disc-shaped structure; two ends of the lower surface of the brake actuator 1 are provided with 2 actuating rods 11 respectively corresponding to the positions of the S-shaped force measuring sensors 4.
A threaded hole is formed in the axial top of the S-shaped force sensor 4; the ball head cap component 3 axially extends into a threaded hole of the S-shaped force measuring sensor 4; the ball head cap component 3 is in threaded fit with the S-shaped force transducer 4.
As shown in fig. 2, which is a cross-sectional view of the ball cap assembly, it can be seen that the ball cap assembly 3 includes a cap frame 31, a cap 32, and a dowel 33; wherein, the cap frame 31 is a concave structure with a through hole at the bottom; the dowel bar 33 axially penetrates through the through hole of the cap frame 31 from top to bottom and extends into the threaded hole of the S-shaped force transducer 4; the cap 32 is fixedly arranged on the top of the dowel bar 33; the inner side wall of the cap frame 31 is fixedly connected with the outer side wall of the cap 32 through thread fit.
The top of the dowel bar 33 is of a ball head structure; the lower surface of the cap 32 is concave arc-shaped, and the shape of the arc-shaped surface corresponds to the shape of the ball head of the dowel bar 33; the upper surface of the cap 32 is of planar configuration. The dowel bar 33 achieves vertical height adjustment through threaded connection with the S-shaped load cell 4.
The measuring process of the measuring and calibrating device comprises the following steps:
the brake actuator 1 moves vertically downwards; 2 actuating rods 11 output pressure downwards; the bottom plane of the actuating rod 11 is in contact with the upper surface of the cap 32, and the pressure is transmitted to the S-shaped load cell 4 through the dowel bar 33, so that the measurement is realized.
The invention adopts a double-path measurement mode, two S-shaped force sensors 4 for calibration are arranged on the device, a double-redundancy brake disc mechanical interface is reserved in the measurement device, and double-path measurement can be realized by adjusting the position of a measurement point after fixation; the measuring point adopts a ball head cap assembly 3 mode, namely the top of the dowel bar 33 is of a ball head structure; the lower surface of the cap 32 is concave arc-shaped, and the shape of the arc-shaped surface corresponds to the shape of the ball head of the dowel bar 33; during measurement, the action surface is in surface-to-surface contact with the upper surface of the cap 32, so that the action surface is protected, and the concave arc surface in the lower surface of the cap 32 is in spherical contact with the ball head at the top of the dowel bar 33, so that the bending moment at the cap 32 is avoided, and the actuator is protected; the measuring point adopts an adjustable scheme, the S-shaped force cell 4 can realize radial distance adjustment through a waist-shaped groove, the dowel bar 33 and the S-shaped force cell 4 realize height adjustment through threaded connection, and the problem of centering the measuring point and the actuator center is solved.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (4)
1. The utility model provides a calibration device is measured to double-circuit brake actuator output power which characterized in that: the device comprises a brake actuator (1), a support sleeve (2), 2 ball head cap assemblies (3), 2S-shaped force sensors (4), 4 guide strips (5) and a base (6); wherein, the base (6) is a horizontally placed plate-shaped structure; the supporting sleeve (2) is axially vertically and fixedly arranged at the center of the upper surface of the base (6); the 4 guide strips (5) are symmetrically arranged on two sides of the supporting sleeve (2) in a pairwise group; and 4 guide strips (5) are fixedly arranged on the upper surface of the base (6); the 2S-shaped force sensors (4) are symmetrically arranged on two sides of the supporting sleeve (2); the S-shaped force measuring sensor (4) is clamped between 2 guide bars (5) in each group of guide bars (5); the 2 ball head cap assemblies (3) are respectively and fixedly arranged at the tops of the 2S-shaped force measuring sensors (4); the brake actuator (1) is arranged at the top of the support sleeve (2);
the 4 guide strips (5) are all arranged in parallel to the long edge of the base (6); the S-shaped force measuring sensors (4) are translated between each group of guide strips (5) along the axial direction of the guide strips (5), so that the contact positions of the S-shaped force measuring sensors (4) and the brake actuator (1) are adjusted;
the brake actuator (1) is of a disc-shaped structure; two ends of the lower surface of the brake actuator (1) are provided with 2 actuating rods (11) respectively corresponding to the positions of the S-shaped force measuring sensors (4);
a threaded hole is formed in the axial top of the S-shaped force measuring sensor (4); the ball head cap assembly (3) axially extends into a threaded hole of the S-shaped force transducer (4); the ball head cap assembly (3) is in threaded fit with the S-shaped force measuring sensor (4);
the ball head cap assembly (3) comprises a cap frame (31), a cap (32) and a dowel bar (33); wherein the cap frame (31) is of a concave structure with a through hole at the bottom; the dowel bar (33) penetrates through the through hole of the cap frame (31) from top to bottom along the axial direction and extends into the threaded hole of the S-shaped force measuring sensor (4); the cap (32) is fixedly arranged at the top of the dowel bar (33); the inner side wall of the cap frame (31) is fixedly connected with the outer side wall of the cap (32) through thread matching.
2. The double-circuit brake actuator output force measurement calibration device of claim 1, wherein: the top of the dowel bar (33) is of a ball head structure; the lower surface of the cap (32) is concave arc-shaped, and the shape of the arc-shaped corresponds to the shape of a ball head of the dowel bar (33); the upper surface of the cap (32) is of a planar structure.
3. The double-circuit brake actuator output force measurement calibration device of claim 2, wherein: the dowel bar (33) is in threaded connection with the S-shaped force transducer (4) to achieve vertical height adjustment.
4. The double-circuit brake actuator output force measurement calibration device of claim 3, wherein: the measurement process of the measurement calibration device comprises the following steps:
the brake actuator (1) moves vertically downwards; 2 actuating rods (11) output pressure downwards; the bottom plane of the actuating rod (11) is in contact with the upper surface of the cap (32), and the pressure is transmitted to the S-shaped load cell (4) through the dowel bar (33) to realize measurement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811326816.8A CN109470384B (en) | 2018-11-08 | 2018-11-08 | Output force measuring and calibrating device of double-path brake actuator |
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| CN201811326816.8A CN109470384B (en) | 2018-11-08 | 2018-11-08 | Output force measuring and calibrating device of double-path brake actuator |
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| CN109470384A CN109470384A (en) | 2019-03-15 |
| CN109470384B true CN109470384B (en) | 2020-09-18 |
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| CN113250202B (en) * | 2021-03-18 | 2022-06-24 | 河海大学 | Steel pipe support wedge block pre-tightening and failure prevention device and installation method |
| CN115876366B (en) * | 2022-12-09 | 2024-07-23 | 中国航天空气动力技术研究院 | Output pressure testing device of brake actuator |
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