CN110031144B - Multifunctional static braking torque testing device and testing method - Google Patents
Multifunctional static braking torque testing device and testing method Download PDFInfo
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- CN110031144B CN110031144B CN201910418433.1A CN201910418433A CN110031144B CN 110031144 B CN110031144 B CN 110031144B CN 201910418433 A CN201910418433 A CN 201910418433A CN 110031144 B CN110031144 B CN 110031144B
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- 238000012360 testing method Methods 0.000 title claims abstract description 74
- 230000003068 static effect Effects 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims abstract description 3
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 241000276425 Xiphophorus maculatus Species 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 1
- 230000008569 process Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 241000208967 Polygala cruciata Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Classifications
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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
Abstract
The application relates to a multifunctional static braking torque testing device and a testing method, wherein the testing device comprises a bearing base fixedly arranged on the ground, two symmetrically arranged bearings are arranged on the bearing base through bearing brackets, a main shaft provided with a brake disc is supported and arranged on the two bearings in a sleeved mode, two sides of the brake disc are respectively connected with one end of a lever through a bolt, and the other ends of the two levers are connected to a hydraulic push rod mechanism through a pin shaft; the hydraulic push rod mechanism comprises a T-shaped connecting plate, a hydraulic oil cylinder is supported and installed on the top surface of the T-shaped connecting plate through an oil cylinder base, the head part of a piston rod of the hydraulic push rod mechanism is connected with a push rod connector, and the hydraulic push rod mechanism is respectively hinged with the two levers through the pin shafts; the bottom end of a T-shaped connecting plate of the hydraulic push rod mechanism is connected with the top end of a T-shaped base through a pin shaft sensor, and the T-shaped base is arranged on the push rod base; the device also comprises a lifting platform arranged in the pit at the front side of the bearing base and a translation sliding table arranged on the ground at one side of the bearing base. The application has the advantages of convenient installation, accurate test result and the like.
Description
Technical Field
The application relates to the technical field of technical brake testing tools, in particular to a multifunctional static brake moment testing device and a testing method.
Background
The existing static braking torque test of the brake is usually carried out by adopting a weight method or a hydraulic lever method, and the adopted test device has the following problems: 1. the function is single: these test units are designed solely for a certain brake test, either only for drum brakes or only for disc brakes. 2. The test of brakes with different specifications cannot be conveniently adapted: the center heights of the brakes with different specifications are different, the center heights of the test villages are fixed, and in order to test the brakes with different specifications, a base is required to be designed for each brake with different specifications, so that the trouble and the cost are added, and the test efficiency is also greatly reduced. 3. The test results are inaccurate: the test has no load cell, so that the test can only be estimated, and a specific numerical value cannot be measured and can only be roughly verified; the weight method is characterized in that the mass of each weight adopted by the weight method is fixed and stepped, so that the weight mass of the brake wheel which just rotates cannot be accurately controlled, and the weight mass certainly exceeds an actual value during rotation, so that the measured value is larger; the hydraulic lever method is generally judged by hydraulic pressure, and the hydraulic efficiency, the pressure display lag, the deflection after the lever is pushed out and the like are all caused by large errors, and the general test value is larger than the actual value. 4. The automation degree is low, and the labor intensity is high: before testing, the weight is needed to be hung manually, the base is carried and installed manually, the position of the brake is moved and adjusted manually, and the weight of some brakes such as hydraulic disc type brakes exceeds 1 ton, so that the workload is large. 5. The structure is not compact: in order to test different brakes, a plurality of test devices are needed, so that the cost is increased, the space is occupied, and the utilization rate is reduced.
Disclosure of Invention
The inventor provides a multifunctional static braking torque testing device and a testing method with reasonable structure aiming at the defects in the prior art, so that the testing precision and the automation degree of operation are improved.
The technical scheme adopted by the application is as follows:
the multifunctional static braking moment testing device comprises a bearing base fixedly installed on the ground, wherein two symmetrically arranged bearings are installed on the bearing base through bearing frames, a main shaft is jointly installed on the two bearings, a braking disc is sleeved on the main shaft, two sides of the braking disc are respectively connected with one end of a lever through a bolt, and the other ends of the two levers are connected to a hydraulic push rod mechanism through a pin shaft; the structure of the hydraulic push rod mechanism is as follows: the hydraulic cylinder is supported and installed on the top surface of the T-shaped connecting plate through a cylinder base, is connected to a hydraulic station through a hydraulic pipe and drives a piston rod to move, the head of the piston rod is connected with a push rod connector, and a displacement sensor is installed on the push rod connector; the push rod connector is respectively hinged with the two levers through the pin shafts; the bottom end of a T-shaped connecting plate of the hydraulic push rod mechanism is connected with the top end of a T-shaped base through a pin shaft sensor, the T-shaped base is fixedly arranged in the middle of the upper surface of the push rod base, and the push rod base is fixedly arranged on the ground; the device also comprises a lifting platform arranged in the pit at the front side of the bearing base and a translation sliding table arranged on the ground at one side of the bearing base.
As a further improvement of the above technical scheme:
a control base is arranged on the ground at the other side of the bearing base, a hollow control pile is arranged on the control base, and a control screen is arranged at the top of the control pile; the control pile is internally penetrated through a control line connected with the hydraulic station and the control screen and a sensor signal line connected with the control screen and the pin shaft sensor.
The main shaft is a stepped shaft, a flat key groove is formed in the end portion of the main shaft, and the middle portion of the main shaft is connected with the brake disc through flat key teeth.
When the drum brake is tested, a brake drum is arranged on a main shaft through a middle hole shaft sleeve, the cross section of the middle hole shaft sleeve is T-shaped, bolt holes II are uniformly distributed along one circle of the circumference of a circular chassis of the middle hole shaft sleeve, the center of the circular chassis is provided with a hollow shaft sleeve, and an inner flat key matched with a flat key groove of the main shaft is processed along the circumference of the hollow shaft sleeve; the brake drum is provided with a circular platy spoke, a circular mounting hole sleeved on the hollow shaft sleeve is formed in the center of the circular platy spoke, a drum surface extends along the axial direction of the circumferential edge of the spoke, a third bolt hole which is arranged corresponding to the second bolt hole is uniformly distributed along one circle of the circumferential edge of the spoke, and the third bolt hole is connected with the second bolt hole through the third bolt hole.
The structure of the displacement sensor is as follows: the hydraulic oil cylinder comprises a lower support fixed on the side wall of a hydraulic oil cylinder, wherein the end part of the lower support is fixedly provided with a protective sleeve through a fastening nut I, the upper end of the protective sleeve is provided with a magneto device, the upper part of the protective sleeve is connected with the bottom end of a telescopic rod, and the top end of the telescopic rod is connected with an upper support arranged on one side of a push rod connector through a fastening nut II.
The structure of the control screen is as follows: including touch display screen, its top is equipped with a plurality of buttons: the emergency stop switch, the descending button, the ascending button, the starting button, the brake opening button and the brake closing button.
The bearing base is provided with a first bolt hole for installation; and bearing seals are arranged on two side surfaces of the bearing through bolts II.
Reinforcing rib plates are arranged on two side surfaces of the bearing frame.
A testing method of a multifunctional static braking torque testing device can test the braking torque of a disc brake or a drum brake, and the specific steps of the braking torque testing of the disc brake are as follows:
the first step: starting a translation sliding table, moving out a tested brake mounting platform on the translation sliding table, and placing a disc brake on the brake mounting platform so as to align a brake jaw of the brake with a brake disc;
and a second step of: pressing a start button, powering up a test system, and preparing for test;
and a third step of: pressing a brake closing button of a brake, and clamping a brake disc by a brake jaw to generate braking force;
fourth step: the lifting button is pressed down, high-pressure hydraulic oil of the hydraulic station is supplied to the hydraulic cylinder through the hydraulic pipe, so that a piston rod is pushed out, the piston rod pushes a lever through the push rod connector and the pin shaft, and the lever pushes the brake disc to rotate;
meanwhile, the pin shaft sensor collects thrust in real time, the displacement sensor collects elongation of the piston rod in real time, and the system calculates braking moment and average braking moment in real time;
fifth step: when the piston rod is extended to the system set point, the system automatically stops.
The beneficial effects of the application are as follows:
the application has the advantages of compact and reasonable structure, convenient operation and the following advantages:
1. the application has multiple functions and multiple functions. The main shaft is provided with the brake disc and the brake drum, so that the test functions of the drum brake and the disc brake are met.
2. The application is convenient for testing the brakes with different specifications. The brakes with different specifications have different center heights, and the lifting platform can be adjusted to adjust the center height, and the disc brake can adjust the position through the translation sliding table.
3. The application has high test precision. The thrust of a piston rod of the hydraulic push rod mechanism is collected through a pin roll sensor, and accurate braking torque is obtained through calculation.
4. The application has high automation degree and low labor intensity. The sliding table and the lifting platform are horizontally moved, so that a tested brake can be installed in a convenient place, the tested brake is driven by a servo motor after being installed, the position of the brake is adjusted, the brake is matched with a brake drum or a brake disc, a weight does not need to be manually loaded, and only a button is needed to be pressed for brake opening, brake closing and test, so that convenience and rapidness are realized, and the labor intensity is low; the test moment is large, the thrust of the lever is from the hydraulic push rod mechanism, and the thrust is large; the extension length of the piston rod can be input through a touch display screen, so that the piston rod is automatically stopped when extending to a set value, the system automatically calculates the braking moment, and the ascending button can be manually pressed to guide the piston rod to extend to a desired position; moment automatic calculation: and the system automatically calculates a large braking torque value according to the collected thrust value and the extension length of the piston rod, and displays the large braking torque value on the touch control screen.
5. The application has compact structure. The drum brake and the disc brake are integrated together in a test mode, the translation sliding table is arranged below the brake disc, the lifting platform is arranged in a pit below the brake drum, and the structure is compact and the occupied space is small.
6. The application has convenient replacement of the brake drum when in use. The brake drum is connected to the middle hole shaft sleeve through the third bolt hole on the spoke, and the mounting hole of the brake drum is sleeved on the hollow shaft sleeve of the middle hole shaft sleeve, so that the brake drum can be conveniently replaced only by detaching the third bolt.
Drawings
Fig. 1 is a schematic structural view of the present application.
Fig. 2 is a schematic structural view of the spindle of the present application.
Fig. 3 is a schematic plan view of the present application in a state of performing a drum brake test.
Fig. 4 is a front view of the inventive mesoporous bushing.
Fig. 5 is a side view of fig. 4.
Fig. 6 is a schematic diagram of a brake drum used in the drum brake test according to the present application.
Fig. 7 is a schematic top view of the mounting structure of the bearing bracket of the present application.
FIG. 8 is a schematic diagram of the mounting structure of the displacement sensor of the present application.
Fig. 9 is a schematic structural view of a control screen according to the present application.
FIG. 10 is a graph of torque calculation stress analysis employed in the braking torque test of the present application.
Wherein: 1. a control base; 2. controlling piles; 3. a control screen; 4. a push rod base; 7. a T-shaped base; 8. a pin shaft sensor; 9. a T-shaped connecting plate; 10. an oil cylinder base; 12. a hydraulic cylinder; 14. a piston rod; 15. a push rod connector; 16. a pin shaft; 17. a lever; 18. a brake disc; 19. a first bolt; 20. a main shaft; 201. flat key teeth; 202. a flat key slot; 21. a bearing; 22. a bearing bracket; 23. rib plates; 24. a bearing base; 241. a first bolt hole; 242. sealing a bearing; 243. a second bolt; 26. a translation sliding table; 27. a lifting platform; 28. a hydraulic station; 29. a hydraulic pipe; 30. a control line; 301. touching the display screen; 302. an emergency stop switch; 303. a down button; 304. a rising button; 305. a start button; 306. a brake release button; 307. a brake closing button; 31. a sensor signal line; 32. a brake drum; 321. a drumhead; 322. a spoke; 323. a third bolt hole; 324. a mounting hole; 33. a mesoporous sleeve; 331. a second bolt hole; 332. a circular chassis; 333. a hollow sleeve; 334. an inner flat key; 34. a third bolt; 35. a displacement sensor; 351. an upper bracket; 352. fastening a second nut; 353. a telescopic rod; 354. a magneto device; 355. a protective sleeve; 356. a lower bracket; 357. and fastening the first nut.
Detailed Description
The following describes specific embodiments of the present application with reference to the drawings.
As shown in fig. 1, the multifunctional static braking torque testing device of the embodiment comprises a bearing base 24 fixedly installed on the ground, wherein two symmetrically arranged bearings 21 are installed on the bearing base 24 through a bearing frame 22, a main shaft 20 is supported and installed on the two bearings 21, a braking disc 18 is sleeved on the main shaft 20, two sides of the braking disc 18 are respectively connected with one end of a lever 17 through bolts 19, and the other ends of the two levers 17 are connected to a hydraulic push rod mechanism through a pin shaft 16; the structure of the hydraulic push rod mechanism is as follows: the hydraulic cylinder 12 is supported and installed on the top surface of the T-shaped connecting plate 9 through a cylinder base 10, the hydraulic cylinder 12 is connected to a hydraulic station 28 through a hydraulic pipe 29 and drives a piston rod 14 to move, the head of the piston rod 14 is connected with a push rod connector 15, a displacement sensor 35 is installed on the piston rod connector, and the piston rod 14 is hinged with the two levers 17 through pin shafts 16 respectively; the bottom end of a T-shaped connecting plate 9 of the hydraulic push rod mechanism is connected with the top end of a T-shaped base 7 through a pin shaft sensor 8, the T-shaped base 7 is fixedly arranged in the middle of the upper surface of the push rod base 4, and the push rod base 4 is fixedly arranged on the ground; also included are a lifting platform 27 mounted in a pit in the front side of the bearing base 24, and a translation stage 26 mounted on the ground on one side of the bearing base 24.
Wherein, the T-shaped connecting plate 9 and the cylinder base 10 arranged on the T-shaped connecting plate can rotate around the pin shaft sensor 8; the servo motor drives the screw rod mechanism to push the brake mounting platform to move forwards and backwards, so that a large and heavy brake is convenient to mount and then translate to a mounting position; the lifting platform 27 is arranged in the pit in an integral structure, and the servo motor drives the screw rod mechanism to enable the brake mounting platform to move downwards, so that the center height of the brake can be conveniently adjusted;
a control base 1 is arranged on the ground on the other side of the bearing base 24, a hollow control pile 2 is arranged on the control base, and a control screen 3 is arranged on the top of the control pile 2; the control pile 2 is internally provided with a control line 30 connecting the hydraulic station 28 and the control panel 3 and a sensor signal line 31 connecting the control panel 3 and the pin sensor 8. The pin shaft sensor 8 transmits the collected thrust signal of the hydraulic push rod mechanism to the control screen 3, and the thrust signal is calculated and displayed in the control screen; the control screen 3 adopts a touch liquid crystal screen, integrates operation and display, operates a test system and displays test data;
as shown in fig. 2, the main shaft 20 is a stepped shaft, and a flat key groove 202 is machined at the end of the main shaft 20, and the middle of the main shaft 20 is connected with the brake disc 18 through flat key teeth 201.
As shown in fig. 3-6, when testing the drum brake, the brake drum 32 is fixed on the main shaft 20 through the middle hole shaft sleeve 33, the section of the middle hole shaft sleeve 33 is in a T shape, two bolt holes 331 are uniformly distributed along one circle of the circumference of the circular chassis 332 of the middle hole shaft sleeve 33, the center of the circular chassis 332 is provided with a hollow shaft sleeve 333, and an inner flat key 334 matched with the flat key groove 202 is processed along the circumference inner circle thereof; the brake drum 32 has a circular plate-shaped spoke 322, a circular mounting hole 324 sleeved on the hollow shaft sleeve 333 is formed in the center of the spoke 322, a drum surface 321 extends along the axial direction at the circumferential edge of the spoke 322, a third bolt hole 323 which is arranged corresponding to the second bolt hole 331 is uniformly distributed along the circumference of the spoke 322, and the third bolt hole 323 and the second bolt hole 331 are connected through a third bolt 34.
As shown in fig. 1 and 7, reinforcing rib plates 23 are provided on both sides of the bearing frame 22.
The bearing base 24 is provided with a first bolt hole 241 for installation; bearing seals 242 are mounted on both sides of the bearing 21 by bolts two 243.
As shown in fig. 8, the outer wall of the hydraulic cylinder 12 and the push rod connector 15 are commonly provided with a displacement sensor 35, which has the following structure: the hydraulic oil cylinder comprises a lower bracket 356 fixed on the side wall of the hydraulic oil cylinder 12, a protecting sleeve 355 is fixedly arranged at the end part of the lower bracket 356 through a fastening nut 357, a magneto device 354 is arranged at the upper end of the protecting sleeve 355, the upper part of the protecting sleeve is connected with the bottom end of a telescopic rod 353, and the top end of the telescopic rod 353 is connected with an upper bracket 351 arranged at one side of a push rod connector 15 through a fastening nut 352.
The displacement sensor 35 detects the extension length of the piston rod 14 to calculate the braking torque. The telescopic rod 353 stretches and contracts with the expansion and contraction of the piston rod 14, and detects the expansion and contraction length of the piston rod 14 in real time; a magneto device 354 for detecting the telescoping length of the telescoping rod 353 by a detection device of the displacement sensor 35; a protective sheath 355, inside which a magneto device, an electric device, etc. are installed, and a telescopic rod 353 is telescopic inside the protective sheath 355.
As shown in fig. 9, the control panel 3 has the structure that: including touch display 301, it is equipped with a plurality of buttons above: a scram switch 302, a down button 303, an up button 304, a start button 305, a brake on button 306, and a brake off button 307.
The touch display 301, the integrated system, can input parameters, control operation and display results through the screen; a scram switch 302 that stops extending the hydraulic cylinder 12, thereby stopping the operation of the piston rod 14, and stopping the braking torque test; the descending button 303 is pressed when the piston rod 14 is required to be reset, the descending button 303 is pressed, the piston rod 14 descends, and the lever 17 is driven to descend; after the test is ready, the lifting button 304 is pressed to start the test, the hydraulic cylinder 12 is extended to push the piston rod 14 to extend, so that the lever 17 is pushed to lift, and the brake disc 18 is pushed to rotate; a start button 305, a system power-on button, and other buttons can be activated after the start button 305 is pressed; a brake-off button 306 for controlling the brake to be turned on, when the button is pressed down, the brake is turned off, the brake pad of the brake disc is separated from the brake disc 18, and the brake disc 18 can rotate in an idle load under the action of the lever 17 and the piston rod 14, so that the brake disc is reset and is ready for the next test; the brake-off button 307 is pressed, and the brake is closed, and the brake shoe clamps the brake disc 18 to generate braking force.
The working process of the application for brake test comprises the following steps:
1. and (5) testing static braking torque of the disc brake.
1. Firstly, starting the translation sliding table 26, moving out a tested brake mounting platform on the translation sliding table, placing a disc brake on the brake mounting platform, and aligning a brake jaw of the brake with the brake disc 18;
2. pressing the start button 305, powering up the test system, and preparing for testing;
3. pressing the brake close button 307, the brake jaws clamp the brake disc 18, generating a braking force;
4. the lifting button 304 is pressed, high-pressure hydraulic oil of the hydraulic station 28 is supplied to the hydraulic cylinder 12 through the hydraulic pipe 29 so as to push out the piston rod 14, the piston rod 14 pushes the lever 17 through the push rod connector 15 and the pin shaft 16, and the lever 17 pushes the brake disc 18 to rotate;
in the test process, the pin shaft sensor 8 collects thrust force F in real time, the displacement sensor 35 collects elongation delta H of the piston rod 14 in real time, and the system calculates braking moment M and average braking moment Ma in real time;
6. when piston rod 14 is extended to the system set point, the system automatically stops.
The calculation principle of the braking moment in the process is as follows:
as shown in fig. 10, the point O in the drawing is the center of the brake disc 18, OB is the length of the lever 17, in the horizontal direction, the length is L, the length is unchanged during the test, OC is the position indication of the lever 17 after the piston rod 14 is extended, and the length is still L; the point A is the center of the pin shaft sensor 8, and the AB length is H 0 The length of the center of the pin sensor 8 from the center of the pin 16 when the piston rod 14 is not extended is the length of the pin sensor perpendicular to OB in the vertical direction.
When the test starts, the piston rod 14 is extended by ΔH, and the length becomes H 0 +Δh=h, lever 17 is in position OC, rod 14 is also tilted along pin sensor 8 to AC position, +ocais θ, and rod 14 thrust is F.
The thrust F of the piston rod 14 is collected by the pin shaft sensor 8; the elongation Δh of the piston rod 14 is acquired by the displacement sensor 35.
According to the cosine law, the following is obtained:
wherein: θ—the angle between OC and CA, i.e. the angle between lever 17 and piston rod 14, in degrees;
l is the length of the lever, and the distance from the end of the lever to the center of the main shaft 20 is in m;
h, the length from the center of the pin 16 to the center of the pin sensor 8 is m;
alpha is the distance from the center of the main shaft 20 (brake disc 18) to the center of the pin shaft sensor 8, and the distance is fixed and has the unit of m;
H＝H 0 +ΔH (2)
wherein: h 0 When the piston rod 14 is not extended, the length from the center of the pin 16 to the center of the pin sensor 8 is m; Δh—the elongation of piston rod 14, in m;
the stress of the pin shaft sensor 8 is decomposed into a component force F perpendicular to the direction of the lever through mechanical analysis L Then:
F L ＝F.sinθ (3)
wherein: f (F) L The force component of the pin shaft sensor 8 in the direction perpendicular to the lever 17 is given by N;
f, stress of the pin roll sensor 8 is shown in the unit of N.
The braking torque M of the brake is:
M＝L F L (4)
average value M of braking moment a ：
Wherein: m is M a Average braking torque, unit N.m;
n-n acquired data;
M i i-th braking torque value, unit N.m.
2. The static braking moment test of the drum brake is the same as the principle of the static braking moment test of the disc brake, and comprises the following steps:
firstly, selecting a qualified brake drum 32 according to the specification of a tested brake;
the middle hole shaft sleeve 33 is sleeved on the flat key groove 202 on the main shaft 20, the mounting hole 324 of the brake drum 32 is sleeved on the hollow shaft sleeve 333 of the middle hole shaft sleeve 33, the bolt 34 is inserted into the bolt hole 323 and the corresponding bolt hole 331, and the brake drum is fastened by a nut;
starting the lifting platform 27, adjusting the top surface of the lifting platform to be flush with the ground, and placing a tested brake;
adjusting the height of the lifting platform 27 so that the brake center height coincides with the center height of the brake drum 32;
a brake is arranged on the upper surface of the lifting platform 27;
operating the control screen 3, starting the hydraulic station 28, pushing out the piston rod 14;
the pin shaft sensor 8 transmits the collected thrust to the control screen 3 in real time, and the displacement sensor 35 detects the extension length of the piston rod 14 in real time. And calculating the static braking moment of the tested brake by the thrust collected by the pin roll sensor 8 according to the extending length of the piston rod 14.
The above description is intended to illustrate the application and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the application.
Claims (9)
1. A multifunctional static braking torque testing device is characterized in that: the hydraulic push rod mechanism comprises a bearing base (24) fixedly arranged on the ground, wherein two symmetrically arranged bearings (21) are arranged on the bearing base (24) through bearing frames (22), a main shaft (20) is jointly arranged on the two bearings (21), a brake disc (18) is sleeved on the main shaft (20), two sides of the brake disc are respectively connected with one end of a lever (17) through bolts (19), and the other ends of the two levers (17) are connected to the hydraulic push rod mechanism through a pin shaft (16);
the structure of the hydraulic push rod mechanism is as follows: the hydraulic oil cylinder (12) is supported and installed on the top surface of the T-shaped connecting plate (9) through an oil cylinder base (10), the hydraulic oil cylinder (12) is connected to a hydraulic station (28) through a hydraulic pipe (29) and drives a piston rod (14) to move, the head of the piston rod (14) is connected with a push rod connector (15), and a displacement sensor (35) is installed on the push rod connector; the push rod connector (15) is hinged with the two levers (17) through the pin shafts (16) respectively; the bottom end of a T-shaped connecting plate (9) of the hydraulic push rod mechanism is connected with the top end of a T-shaped base (7) through a pin shaft sensor (8), the T-shaped base (7) is fixedly arranged in the middle of the upper surface of the push rod base (4), and the push rod base (4) is fixedly arranged on the ground;
the device also comprises a lifting platform (27) arranged in the pit at the front side of the bearing base (24) and a translation sliding table (26) arranged on the ground at one side of the bearing base (24);
the pin shaft sensor (8) collects thrust in real time, and the displacement sensor (35) collects elongation of the piston rod (14) in real time.
2. The multi-functional static braking torque testing device of claim 1, wherein: a control base (1) is arranged on the ground at the other side of the bearing base (24), a hollow control pile (2) is arranged on the control base, and a control screen (3) is arranged at the top of the control pile (2); the control pile (2) is internally penetrated through a control line (30) which is connected with the hydraulic station (28) and the control screen (3) and a sensor signal line (31) which is connected with the control screen (3) and the pin shaft sensor (8).
3. The multi-functional static braking torque testing device of claim 1, wherein: the main shaft (20) is a stepped shaft, a flat key groove (202) is formed in the end portion of the main shaft, and the middle portion of the main shaft (20) is connected with the brake disc (18) through flat key teeth (201).
4. The multi-functional static braking torque testing device of claim 3, wherein: when the drum brake is tested, a brake drum (32) is mounted on a main shaft (20) through a middle hole shaft sleeve (33), the cross section of the middle hole shaft sleeve (33) is T-shaped, bolt holes II (331) are uniformly distributed along one circle of the circumference of a circular chassis (332) of the middle hole shaft sleeve (33), a hollow shaft sleeve (333) is arranged in the center of the circular chassis (332), and an inner flat key (334) matched with a flat key groove (202) of the main shaft (20) is processed along the circumference inner ring of the hollow shaft sleeve; the brake drum (32) is provided with a circular platy spoke (322), a circular mounting hole (324) sleeved on the hollow shaft sleeve (333) is formed in the center of the circular platy spoke, a drum surface (321) is axially extended at the circumferential edge of the spoke (322), three bolt holes (323) which are correspondingly arranged with the second bolt holes (331) are uniformly distributed along the circumference of the spoke (322), and the third bolt holes (323) are connected with the second bolt holes (331) through the third bolt holes (34).
5. The multi-functional static braking torque testing device of claim 1, wherein: the displacement sensor (35) has the following structure: the hydraulic oil cylinder comprises a lower bracket (356) fixed on the side wall of a hydraulic oil cylinder (12), wherein the end part of the lower bracket is fixedly provided with a protective sleeve (355) through a fastening nut I (357), the upper end of the protective sleeve (355) is provided with a magneto device (354), the upper part of the protective sleeve is connected with the bottom end of a telescopic rod (353), and the top end of the telescopic rod (353) is connected with an upper bracket (351) arranged on one side of a push rod connector (15) through a fastening nut II (352).
6. The multi-functional static braking torque testing device of claim 1, wherein: the structure of the control screen (3) is as follows: including touch display screen (301), it is equipped with a plurality of buttons above: an emergency stop switch (302), a descending button (303), an ascending button (304), a starting button (305), a brake opening button (306) and a brake closing button (307).
7. The multi-functional static braking torque testing device of claim 1, wherein: the bearing base (24) is provided with a first bolt hole (241) for installation; bearing seals (242) are arranged on two side surfaces of the bearing (21) through bolts II (243).
8. The multi-functional static braking torque testing device of claim 1, wherein: reinforcing rib plates (23) are arranged on two side surfaces of the bearing frame (22).
9. A test method using the multifunctional static braking torque test device according to claim 6, characterized in that: the method can test the braking moment of the disc brake or the drum brake, and the specific steps of the braking moment test of the disc brake are as follows:
the first step: starting a translation sliding table (26), moving out a tested brake mounting platform on the translation sliding table, placing a disc brake on the brake mounting platform, and aligning a brake jaw of the brake with a brake disc (18);
and a second step of: pressing a start button (305), powering up the test system, and preparing for testing;
and a third step of: pressing a brake closing button (307), the brake jaws clamp the brake disc (18) to generate braking force;
fourth step: the lifting button (304) is pressed down, high-pressure hydraulic oil of the hydraulic station (28) is supplied to the hydraulic cylinder (12) through the hydraulic pipe (29), so that the piston rod (14) is pushed out, the piston rod (14) pushes the lever (17) through the push rod connector (15) and the pin shaft (16), and the lever (17) pushes the brake disc (18) to rotate;
meanwhile, the pin shaft sensor (8) collects thrust in real time, the displacement sensor (35) collects elongation of the piston rod (14) in real time, and the system calculates braking moment and average braking moment in real time;
fifth step: when the piston rod (14) is extended to the system set point, the system automatically stops.
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| CN111649861B (en) * | 2020-04-27 | 2021-09-07 | 张文波 | Intelligent production line for braking system |
| CN111707464B (en) * | 2020-06-30 | 2023-04-18 | 中车青岛四方车辆研究所有限公司 | Brake controller test equipment and test method |
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