CN202372343U - Microinching device of durability testing-bed of gap self-adjusting mechanism of drum brake - Google Patents
Microinching device of durability testing-bed of gap self-adjusting mechanism of drum brake Download PDFInfo
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- CN202372343U CN202372343U CN2011205233565U CN201120523356U CN202372343U CN 202372343 U CN202372343 U CN 202372343U CN 2011205233565 U CN2011205233565 U CN 2011205233565U CN 201120523356 U CN201120523356 U CN 201120523356U CN 202372343 U CN202372343 U CN 202372343U
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- regulating mechanism
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- drum
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Abstract
The utility model discloses a microinching device of a durability testing-bed of a gap self-adjusting mechanism of a drum brake, which comprises a motor, a reducer, a bi-directional ball screw, two lead screw nuts, a supporting base, a supporting block and two movable plates. The motor is connected with the bi-directional ball screw in transmission mode through the reducer, the two lead screw nuts are connected with two portions of the bi-directional ball screw in different screwing directions symmetrically and fixedly connected with the two movable plates respectively, the supporting base is fixedly arranged, the supporting block is arranged on an upper portion of the supporting base, and the two movable plates are symmetrical in structure and arranged on two sides of the supporting block respectively. The supporting block is adopted to fix a braking bottom plate so as to fix the gap self-adjusting mechanism and fix a brake assembly position. The two movable plates drive two semi-plates incising along the diameter to test, the two semi-plates are slowly separated through a brake drum, a process of gradually increasing a braking gap is simulated, so that testing of the gap self-adjusting mechanism is comprehensive in process and life-like in result, and obtained data has higher reference value.
Description
Technical field
The utility model relates to the drum brake test unit, and is especially relevant with the durability test device of drum brake intermediate gap self-adjusting mechanism.
Background technology
At present, drum brake widespread use on pickup truck and microbus.Fig. 1 carries out the drum brake structural representation of clearance self-regulating when driving for certain.During braking, wheel cylinder 1 injects high hydraulic brake fluid, and driven plunger 2 leans brake-shoe 3, makes brake-shoe 3 and brake drum 4 compress, and through the friction between brake drum 4 and the brake-shoe 3, forms braking action.The size in gap has direct influence to the effect stroke of brake pedal between brake drum 4 and the brake-shoe 3 in this braking procedure.The too small brake overheating that causes easily of brake clearance, braking are too responsive, and the excessive brake pedal effect stroke that then can cause of brake clearance increases, and the brake safe coefficient is greatly reduced.Automobile is constantly braking in the process of moving; Brake-shoe 3 wearing and tearing gradually thereupon, brake clearance autocompensation installation 5 should be able to perceived friction pad wear degree, when may wear to when a certain amount of; In time recompense, make that the gap reverts to normal value between brake-shoe 3 and the brake drum 4.
Clearance self-regulating mechanism 5 is installed in piston 2 and reaches on wheel cylinder 1 cylinder body that is connected with piston 2; Comprise gap plectrum 51, ratchet 52 and back-moving spring 53; Gap plectrum 51 is installed on the piston 2 through bolt 54; Gap plectrum 51 1 ends and ratchet 52 clampings, the other end is connected with back-moving spring 53 on being connected gap support plate 55, and gap support plate 55 is fixed on the piston 2; Ratchet 52 is fixed on the lining of adjustment piston 2, and the adjustment lining is installed in wheel cylinder 1 cylinder body.When master cylinder to wheel cylinder 1 fuel feeding; High oil pressure promotion piston 2 outwards moves in the wheel cylinder 1, and piston 2 can drive gap support plates 55 and outwards move simultaneously, thereby back-moving spring 53 is owing to receive outside power pulling gap plectrum 51 simultaneously; Gap plectrum 51 is stirred ratchet 52 with bolt 54 as fulcrum; Make the ratchet 52 adjustment lining of ining succession rotate together, through screw thread the adjustment screw is outwards adjusted, thereby reached the effect in gap between compensation brake-shoe 3 and the brake drum 4.
Present stage; Country, industry are unspecial in the operating characteristic of brake clearance self-regulating mechanism 5 and the test detecting equipment of gap compensation ability thereof; Mention correlation test checkout equipment technology in the part Study data and fail to avoid brake-shoe and brake drum conventional thought in relative rotation, complicacy, test period are long, power consumption is bigger to cause the testing equipment structure.Granted publication number is CN 201965026 U; Mandate day is that on 09 07th, 2011 utility model provides a kind of brake clearance self-regulating mechanism on-line measuring device; This device is used for the online detection of detent finished product; Because this device only can be tested the action of the clearance self-regulating mechanism 5 of single braking procedure, and can't fine motion adjustment brake-shoe 3 with brake drum 4 between the gap, can not the online simulation detent process that truly brake-shoe 3 weares and teares gradually in the use; Feasible imperfect, untrue to the test of clearance self-regulating mechanism 5, the reference property that obtains data is poor.
The utility model content
To the problem that exists in the prior art; The purpose of the utility model for provide a kind of simple in structure, can fine motion adjustment brake-shoe in clearance self-regulating mechanism test and brake drum between distance, thereby the simulating brake device is true use in the brake-shoe inching gear of the drum brake clearance self-regulating mechanism endurance test bed of wear process gradually.
For realizing above-mentioned purpose, the technical scheme of the utility model is following:
A kind of inching gear of drum brake clearance self-regulating mechanism endurance test bed; Comprise: motor, reductor, two-way ball-screw, two feed screw nuts, supporting seat, tray and two moving plates; The said motor via reducer said two-way ball-screw that is in transmission connection; Said two feed screw nut symmetries are connected on two parts of the different rotation directions of said two-way ball-screw, and are fixedly connected with said two moving plates respectively, and said supporting seat fixedly installs; Said tray is installed in said supporting seat top, and said two move the plate structures symmetry and lay respectively at said tray both sides.
Further, said two moving plate tops all are installed with installing plate, and the bottom all links to each other with said two feed screw nuts through guide block, is provided with the T type groove that is used to install brake drum on the two said installing plates.
Further, also comprise the guide rail that fixedly installs, said guide rail is two, is symmetricly set on said two-way ball-screw both sides, and said two moving plates are supported on the said guide rail.
Further, also comprise two support plates that fixedly install, the two ends of the said leading screw of bearings that said two support plates press-fit through inside.
The beneficial effect of the utility model is that the utility model compared with prior art adopts fixedly back-plate of tray in the utility model; Thereby fixed interval (FI) self-adjusting mechanism; Make the brake assembly stationkeeping, slowly separate with brake drum through the moving two halves sheet test of two moving strips along the diameter cutting, thus the increase process gradually in simulating brake gap; Make clearance self-regulating mechanism the testing experiment process more comprehensively, the result is more true to nature, the gained data more are added with reference value.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further explain:
Fig. 1 is the drum brake structural representation;
Fig. 2 is the inching gear user mode synoptic diagram of a kind of drum brake clearance self-regulating mechanism of the utility model endurance test bed.
Embodiment
The exemplary embodiments that embodies the utility model characteristic and advantage will be described in detail in following explanation.Be understood that the utility model can have various variations on various embodiment, the scope of its neither disengaging the utility model, and explanation wherein and accompanying drawing be the usefulness of being used as explanation in itself, but not in order to restriction the utility model.
As shown in Figure 2, use the utility model test clearance self-regulating mechanism 5, just be to use the utility model that brake assembly 9 is carried out the fine motion adjustment.Brake assembly 9 comprises back-plate 92, wheel cylinder 91 and brake-shoe 93, assembling clearance self-regulating mechanism 5 to be measured on the wheel cylinder 91, and back-plate 92 is equipped with wheel cylinder 91, clearance self-regulating mechanism to be measured 5 and brake-shoe 93.
The utility model comprises motor 61, reductor 611, two-way ball-screw 62, feed screw nut 63, supporting seat 64, tray 65, moving plate 66, installing plate 67 and base plate 68.Base plate 68 is installed on the worktable 10 through bolt, as the main body that supports.Motor 61 is a servomotor, can be through 82 controls of the computing machine in the data collecting and processing system 8.Motor 61 all is fixedly mounted on the base plate 68 with reductor 661, and through the reductor 611 two-way ball-screw 62 that is in transmission connection.Two-way ball-screw 62 two rotation directions are opposite, and the centre is a polished rod.The input end of two-way ball-screw 62 links to each other with reductor 611, and the through hole that two ends are passed on the support plate 621 is supported on two support plates 621, and support plate 621 is fixedly mounted on the base plate 68.The through hole that polished rod in the middle of the two-way ball-screw 62 partly passed on the supporting seat 64 is supported on the supporting seat 64; Supporting seat 64 also is fixedly mounted on the base plate 68; Supporting seat 64 and the two-way ball-screw 62 of two support plates, 621 together support reduce two-way ball-screw 62 distortion.Be equipped with feed screw nut 63 on the two-way ball-screw 62, between feed screw nut 63 and the two-way ball-screw 62 ball be housed also, to improve transmission accuracy.
Two feed screw nuts 63 are the symmetry assembling on two-way ball-screw 62, to guarantee that two feed screw nuts, 63 rotation directions are opposite, it is fast identical to revolve.Two feed screw nuts 63 are fixedly mounted in two guide blocks 631, and two guide blocks, 631 tops are fixedly connected with two moving plates 66 respectively.The lower support of two moving plates 66 and can be slided along guide rail on guide rail.Guide rail is a two parallel; Bearing of trend is parallel with two-way ball-screw 62 bearing of trends; This guide rail is fixedly mounted on the base plate 68, can prevent that check plate 66 presses two-way ball-screw 62 through guide block 631 and feed screw nut 63, makes two-way ball-screw 62 deform.Be installed with installing plate 67 through bolt and nut respectively on two moving plate 66 tops; Two installing plates, 67 upper surfaces are processed with T type groove 671; T type bolt is installed in this T type groove 671; Can make T type bolt pass test through regulating two moving plate 66 positions, make test be fixed together through fastening nut again with brake drum 41 and installing plate 67 with the hole on the brake drum 41.Test has therefrom been cut with brake drum 41 is divided into two, and two tests are fixed together with two installing plates 67 respectively with brake drum 41.The thickness of installing plate 67 can be adjusted and change according to the difference of clearance self-regulating mechanism 5, with the test of the clearance self-regulating mechanism 5 that adapts to multiple different model.Two moving plates 66 are symmetrical structure, and two installing plates 67 also are symmetrical structure.
Supporting seat 64 structures are equivalent to install the mandrel of detent, and the upper end is processed with external thread, are processed with internal thread on the tray 65, through threaded engagement, make tray 65 be installed in supporting seat 64 tops.Be positioned at tray 65 bottoms on supporting seat 64 upper external thread nut 60 also is installed; Back-plate 92 is installed on tray 65 tops; On back-plate 92, press pressing plate 69, pressing plate 69 compresses through a bolt that matches with tray 65 upper internal threaded, thereby back-plate 92 is fixed on the tray 65.Tray 65 all is positioned in the middle of two moving plates 66 and two installing plates 67 with supporting seat 64, thereby makes back-plate 92 be fixed on the centre position of test with brake drum 41.Wheel cylinder 91, clearance self-regulating mechanism 5 and brake-shoe 93 are installed on back-plate 92, thereby confirm brake-shoe 93 and the relative position of test with brake drum 41.
When using the utility model that clearance self-regulating mechanism 5 is tested, also need be to clearance self-regulating mechanism 5 fuel feeding.The oil pressure feed system 7 of clearance self-regulating mechanism 5 comprises Oil pump electrical machinery 71, oil pump 72, oil pump solenoid valve 73 and fuel tank 74.Oil pump electrical machinery 71 drives oil pump 72 actions.Oil pump 72 oil-ins are communicated with fuel tank 74, and pump is got fluid in fuel tank 74, and oil pump 72 oil-outs are communicated with oil pump solenoid valve 73, and pass through oil pump solenoid valve 73 to wheel cylinder 91 pumping fluid.Oil pump solenoid valve 73 is through the oil circuit of pipeline connection wheel cylinder 91.
For obtaining the action data of clearance self-regulating mechanism 5, also need use data collecting and processing system 8.Data collecting and processing system 8 comprises microspur sensor 81 and computing machine 82, and microspur sensor 81 is connected with computing machine 82 communications.Microspur sensor 81 be installed in the test with on the brake drum 41 with relative position, brake-shoe 93 centers.Microspur sensor 81 acquisition tests are with the data of spacing between brake drum 41 and the brake-shoe 93, and send to computing machine 82.Computing machine 82 receives the data that microspur sensor 81 sends and handles, and output relevant numerical or curve map.
The process of using the utility model that clearance self-regulating mechanism 5 is tested is following:
At first will test with brake drum 41 and cut, be divided into two.The back-plate 92 of brake assembly 9 is fixedly mounted on the tray 65 through pressing plate 69, thus fixing brake assembly 9.Then two tests are fixedly mounted on respectively on two installing plates 67 through T type bolt with brake drum 41.Starter motor 61, and carry out servocontrol.Motor 61 drives two-way ball-screw 62 rotations through reductor 611, and two-way ball-screw 62 is through the cooperation of feed screw nut 63, makes feed screw nut 63 moving linearlies, and the moving direction of two feed screw nuts 63 is opposite, and speed is identical.Feed screw nut 63 passes through the moving plate 66 of guide block 631 drives and moves on guide rail with installing plate 67, thereby makes two tests with the opposite direction constant speed movement in brake drum 41 edges.Simultaneously, to wheel cylinder 91 brake fluid is provided, makes wheel cylinder 91 carry out braking maneuver through oil pressure feed system 7.At this moment, microspur sensor 81 beginning acquisition tests are with the data of spacing between brake drum 41 and the brake-shoe 93, and send to computing machine 82 and handle.Along with two tests are drawn back with brake drum 41 gradually; Clearance self-regulating mechanism 5 is also had an effect in braking procedure, makes that the changes in spacing process so moves in circles for widening gradually, diminish suddenly, widening gradually not only but also diminish suddenly between test use brake drum 41 and the brake-shoe 93; Set the braking number of times up to reaching; Test stops, or two tests draw back with brake drum 41 reach certain numerical value after, clearance self-regulating mechanism 5 lost efficacy.Computing machine 82 is handled these data, just can obtain clearance self-regulating mechanism 5 and when the gap becomes big between brake drum 41 and the brake-shoe 93, compensate in actual use up to the whole course of action that lost efficacy.
It is 6mm that the utility model can be simulated 100,000 total wear extenies in braking back, and its brake clearance follows the scope of combining in 0.8mm.The translational speed of confirming brake drum 41 and corresponding anchor clamps thus is 0.06mm/1000 time.The braking oil pressure scalable is set different braking oil pressures according to different detents, gets conventional brake pressure a: 3.43mpa (35kgf/cm2) here, and pattern of pressure is a hydraulic pressure, and the load time is 1～2 second, and the hydraulic pressure discharge time is 1～30 second.
According to translational speed, the single hydraulic loaded discharge time sum of moving plate 66, can move plate 66 actual translational speed scopes, can carry out type selecting to servomotor 61 in view of the above, confirm reductor 661 ratio of gear.Because oil pressure loads, it is adjustable to be discharged in a time scope; Anchor clamps translational speed for the guaranteed conditions requirement; After servomotor 61 models were confirmed, reductor 661 ratio of gear also were necessary for definite value, and concrete oil pressure loads, the discharge time sum also is a definite value; And when the hydraulic pressure value that loads changed, concrete oil pressure loaded, the discharge time sum also must be constant.
The beneficial effect of the utility model is; The utility model compared with prior art; Adopt fixedly back-plate of tray 65 in the utility model, thereby fixed interval (FI) self-adjusting mechanism 5 makes brake assembly 9 stationkeeping; Driving the two halves sheet test of cutting along diameter through two moving plates 66 slowly separates with brake drum 41; Thereby the increase process in simulating brake gap, through oil pressure feed system 7 implement braking and in the braking procedure intermediate gap self-adjusting mechanism 5 adjustment brake clearances in good time, again through microspur sensor 81 test brake-shoes 93 and the gap of test with brake drum 41; Analyzing brake-shoe 93 through computing machine 82 changes with the gap of test with brake drum 41; Just know course of action and the maximum adjustment distance of clearance self-regulating mechanism 5 in the actual use of detent, this process of the test is more comprehensive, the result is more true to nature, and the gained data more are added with reference value.
The technical scheme of the utility model is disclosed as above by preferred embodiment.Those skilled in the art should recognize change and the retouching of under the situation of scope that does not break away from the appended the utility model that claim disclosed of the utility model and spirit, being done, and all belong within the protection domain of claim of the utility model.
Claims (4)
1. the inching gear of a drum brake clearance self-regulating mechanism endurance test bed; It is characterized in that; Comprise: motor, reductor, two-way ball-screw, two feed screw nuts, supporting seat, tray and two moving plates, the said motor via reducer said two-way ball-screw that is in transmission connection, said two feed screw nut symmetries are connected on two parts of the different rotation directions of said two-way ball-screw; And be fixedly connected with said two moving plates respectively; Said supporting seat fixedly installs, and said tray is installed in said supporting seat top, and said two move the plate structures symmetry and lay respectively at said tray both sides.
2. the inching gear of drum brake clearance self-regulating mechanism endurance test bed as claimed in claim 1; It is characterized in that; Said two moving plate tops all are installed with installing plate; The bottom all links to each other with said two feed screw nuts through guide block, is provided with the T type groove that is used to install brake drum on the two said installing plates.
3. the inching gear of drum brake clearance self-regulating mechanism endurance test bed as claimed in claim 2; It is characterized in that, also comprise the guide rail that fixedly installs, said guide rail is two; Be symmetricly set on said two-way ball-screw both sides, said two moving plates are supported on the said guide rail.
4. the inching gear of drum brake clearance self-regulating mechanism endurance test bed as claimed in claim 3 is characterized in that, also comprises two support plates that fixedly install, the two ends of the said leading screw of bearings that said two support plates press-fit through inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205233565U CN202372343U (en) | 2011-12-14 | 2011-12-14 | Microinching device of durability testing-bed of gap self-adjusting mechanism of drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205233565U CN202372343U (en) | 2011-12-14 | 2011-12-14 | Microinching device of durability testing-bed of gap self-adjusting mechanism of drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202372343U true CN202372343U (en) | 2012-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205233565U Expired - Fee Related CN202372343U (en) | 2011-12-14 | 2011-12-14 | Microinching device of durability testing-bed of gap self-adjusting mechanism of drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202372343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799100A (en) * | 2019-03-15 | 2019-05-24 | 西南交通大学 | A kind of modularization comprehensive braking performance test testing stand |
-
2011
- 2011-12-14 CN CN2011205233565U patent/CN202372343U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799100A (en) * | 2019-03-15 | 2019-05-24 | 西南交通大学 | A kind of modularization comprehensive braking performance test testing stand |
| CN109799100B (en) * | 2019-03-15 | 2021-03-19 | 西南交通大学 | Modularized comprehensive brake performance test bench |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20171214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |