CN213985017U - Self-adjusting function simulation detection equipment of drum brake - Google Patents
Self-adjusting function simulation detection equipment of drum brake Download PDFInfo
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- CN213985017U CN213985017U CN202022884983.3U CN202022884983U CN213985017U CN 213985017 U CN213985017 U CN 213985017U CN 202022884983 U CN202022884983 U CN 202022884983U CN 213985017 U CN213985017 U CN 213985017U
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Abstract
The utility model discloses a drum brake's self-modulation function simulation check out test set. One end of a screw rod is coaxially connected with the output ends of a servo motor and a speed reducer component through a connector, the other end of the screw rod penetrates through a mounting hole in the middle of a fixed support and then is supported and connected to the screw rod fixed support, two screw rod nuts are sleeved outside the screw rod to form a screw rod nut pair, each screw rod nut is sleeved with a nut end block, a drum simulation component is arranged on each nut end block, and each drum simulation component comprises a connecting plate, a mounting plate and a simulation tool drum; the bottom of the connecting plate is fixedly connected with the first nut end block/the second nut end block, the mounting plate is mounted on the connecting plate, and the bottom of the connecting plate is connected with the sliding block sliding rail; a displacement sensor is arranged on the side face of a connecting plate of the drum simulation assembly, and a clearance sensor is arranged on the simulation tool drum. The utility model discloses can simulate drum brake facing wearing and tearing and carry out the self-modulation function detection verification of stopper, strong adaptability does not destroy former stopper, and experimental full cycle is short, and is efficient.
Description
Technical Field
The utility model relates to a car industry has drum brake's of self-adjusting function performance testing, especially whole car factory require higher, and need whole monitoring self-adjusting function and can in time feed back the self-adjusting testing of concrete clearance value to the reliability of the clearance automatically regulated function of stopper, the utility model discloses can realize the comprehensive detection to above-mentioned requirement.
Background
In the development process of the brake system of the whole automobile, besides the brake performance including the linkage performance of a clutch, the service brake performance, the parking brake performance, the endurance performance test, the abrasion or service life test, the working stability performance of a brake, the automatic clearance adjusting performance of the brake and the like, a series of brake liquid amounts including the brake pedal stroke, the stroke and the brake liquid amount of a clutch master cylinder, the action liquid pressure and the working liquid amount of ABS, the brake liquid amount required by the complete braking of a drum brake or a disc brake, a hose and a hard pipe in a pipeline and the like are checked. The development process comprises the steps of drawing design in the early stage and bench equipment test detection in the later stage, the relevant performance can be checked through theoretical calculation and performance test model selection of the friction plate in the drawing design stage in the early stage, and the relevant performance can be more reliably detected through bench tests and relevant real vehicle tests of the host machine in the later stage.
Some endurance tests, wear tests or life tests, the full-stroke self-regulation detection tests are often long in test period, few samples are detected, more samples cannot be detected, the reliability is low, the detection result and the actual deviation are large, the service life evaluation of a real vehicle is influenced, the replacement period of a brake pad is set wrongly, or even the deviation of the gap measurement result of the self-regulation detection tests is too large, and the working performance of a brake is influenced:
firstly, the measured value of the self-adjusting clearance is larger, and the brake fluid in a brake pipeline is larger, so that the pedal feeling is poor, and customer complaints are caused;
and secondly, the measured value of the self-adjusting clearance is smaller, dragging is generated, the brake lining and the brake drum are in a wear state for a long time, the brake temperature is increased, the brake efficiency is reduced, and danger is generated.
The method for evaluating the self-adjusting clearance of the hoof drum in the prior art is a real vehicle endurance test, the test period is long, the real vehicle test cannot monitor the clearance value of the hoof drum all the time, the clearance value can only be roughly measured at an observation hole through a feeler gauge, the measurement is difficult, the measurement result is inaccurate, the number of test samples is often small due to the long test period, the test result is incomplete, evaluation of related performance of a product by technicians is influenced, and related parameters and usage of a real vehicle are deviated, so that danger is caused.
SUMMERY OF THE UTILITY MODEL
The method aims to solve the problems that in the prior art, the full-stroke self-adjusting test period is long, self-adjusting gap detection is difficult, the measurement result is inaccurate, the number of test samples is small, the test result is incomplete, evaluation of technical personnel on relevant performance of products is influenced, relevant parameters and usage of a real vehicle are deviated, and danger is caused.
In order to achieve the above purpose, the technical scheme of the utility model is that:
the utility model comprises a servo motor and reducer assembly, a lead screw, a middle shaft, a slide block, a slide rail, a workbench, a drum simulation assembly, a drum brake and an installation block; the servo motor and the speed reducer assembly are fixedly arranged on one side of the workbench through a speed reducer fixing support, the lead screw fixing support is fixedly arranged on the other side of the workbench, and the fixing support is fixedly arranged on the workbench between the speed reducer fixing support and the lead screw fixing support; one end of the screw rod is coaxially connected with the output ends of the servo motor and the reducer assembly through a connector, and the other end of the screw rod penetrates through a mounting hole in the middle of the fixed support and is connected to the screw rod fixed support in a supporting manner; a first screw nut and a second screw nut are respectively sleeved outside the screw between the fixed support and the screw fixed support and between the fixed support and the servo motor and between the fixed support and the speed reducer assembly through threads to form a screw nut pair, and the first screw nut and the second screw nut are respectively fixedly sleeved on a first nut end block and a second nut end block;
the first nut end block and the second nut end block are respectively provided with a drum simulation assembly, and each drum simulation assembly comprises a connecting plate, a mounting plate and a simulation tool drum; the bottom of the connecting plate is fixedly connected with the first nut end block/the second nut end block, the mounting plate is mounted on the connecting plate, the simulation tool drum is in a semi-annular shape, and the simulation tool drum is fixed on the mounting plate; sliding rails are arranged at the corners of the workbench, a sliding block is embedded in each sliding rail to form a sliding rail pair, and the bottom of the connecting plate is connected with the sliding block of the workbench through a bolt; a displacement measuring plate is installed on the side face of a connecting plate of one of the drum simulation assemblies, a fixed clamping groove is installed on a workbench beside the displacement measuring plate, an abrasion displacement sensor is installed in the fixed clamping groove, and a probe of the abrasion displacement sensor faces the abrasion displacement sensor; the middle shaft is fixed on the fixed support, the upper end of the middle shaft penetrates through the mounting plate and the central hole of the connecting plate and then is provided with a mounting block, the drum brake is sleeved outside the mounting block and the middle shaft, and the drum simulation assemblies on the first nut end block and the second nut end block are respectively positioned at two sides of the drum brake; the sensor clamping groove is fixed on the side face of the simulation tool drum through a threaded connector, the gap sensor is installed and fixed in the sensor clamping groove, and a probe of the gap sensor penetrates through a through hole of the sensor clamping groove to be in contact with and abut against the surface of a friction plate of the drum brake.
The thread turning directions of the external threads of the screw rod, sleeved and connected by the second screw rod nut and the first screw rod nut, are opposite, and the thread turning directions of the internal threads of the second screw rod nut and the first screw rod nut are opposite.
The gap sensor and the abrasion displacement sensor are connected to an external display through wires.
The sliding block is matched and embedded with the sliding rail through the T-shaped clamping groove.
The servo motor and the reducer assembly are matched with one end of the connector through key grooves, and the other end of the connector is sleeved with the lead screw and fixed through bolts.
The utility model has the advantages that:
the utility model discloses a length of each acting as go-between of parking mechanism assembly, the support position of acting as go-between, rocking arm mounted position and each mounting dimension of rocking arm all can be adjusted, only have a braking arm-drag for conventional drum brake, act as go-between can only be from the brake of single straight line winding-out, and the winding-up is linked to the arrangement in the chassis part;
the novel rotating arm mechanism assembly can adjust the mounting position and angle of the rotating arm mechanism on the braking bottom plate according to the structural requirements of a vehicle suspension and a parking mechanism, and has good applicability and small winding loss;
the hook head position, the tumbler pin hole position and the tail end hole position of the tumbler are adjusted to form different lever ratios, so that the wire pulling stroke and the slope force are changed, the adjustment can be carried out more quickly and conveniently when the requirement of the whole vehicle is changed, the period is short, the cost is saved, and the long period and the waste of a die are prevented;
when a vehicle is parked, the whole movement process only has the rotation action of the stay wire guide wheel and the rotating arm pin and the compression and return movement of the stay wire spring, so that the problems that the conventional drum brake stay wire spring and a guide piece are excessively abraded or clamped to cause unsmooth parking, the stay wire stroke is overlong and even the brake fails and the like caused by abrasion damage of the guide piece are avoided, the abrasion of each part is smaller, the movement is smoother, abnormal sound is smaller, and the transmission efficiency is higher.
In conclusion, the self-regulating function detection equipment of the utility model can simulate the abrasion of the drum brake lining to detect and verify the self-regulating function of the brake, and can realize the self-regulating function detection of drum brake products with different specifications by replacing the limiting mechanism, thus having strong adaptability; the self-adjusting detection equipment simulates the abrasion of the lining, can detect under the condition of not damaging the original brake, and has short test period and high efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is an exploded view of the structure of the present invention.
In the figure: the device comprises a mounting plate, a connecting plate, 3 servo motors and speed reducer assemblies, 4 lead screw fixing supports, 5 plane bearings, 6 lead screws, 7 first nut end blocks, 8 simulation tool drums, 9 drum brakes, 10 mounting blocks, 11 middle shafts, 12 fixing supports, 13 second nut end blocks, 14 sliding blocks, 15 sliding rails, 16 first lead screw nuts, 17 working tables, 18 second lead screw nuts, 19 connectors, 20 speed reducer fixing supports, 22 displays, 23 fixing clamping grooves, 24 abrasion displacement sensors, 25 displacement measuring plates, 26 threaded connectors, 27 sensor clamping grooves and 28 gap sensors.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the embodied equipment includes a servo motor and reducer assembly 3, a lead screw 6, a middle shaft 11, a slide block 14, a slide rail 15, a workbench 17, a drum simulation assembly, a drum brake 9 and a mounting block 10.
The fixed support 12, the screw rod fixed support 4 and the speed reducer fixed support 20 are fixed on the workbench 17 through bolts, the servo motor and speed reducer assembly 3 is fixedly arranged on one side of the workbench 17 through the speed reducer fixed support 20, the screw rod fixed support 4 is fixedly arranged on the other side of the workbench 17, and the fixed support 12 is fixedly arranged on the workbench 17 between the speed reducer fixed support 20 and the screw rod fixed support 4; one end of a screw 6 is coaxially connected with the output end of the servo motor and reducer assembly 3 through a connector 19, the servo motor and reducer assembly 3 is connected with a reducer fixing support 20 through a bolt, the other end of the screw 6 penetrates through a mounting hole in the middle of a fixing support 12 and is connected to the screw fixing support 4 in a supporting mode, and the screw 6 is mounted in the mounting hole of the screw fixing support 4 through a plane bearing 5; the servo motor and the reducer component 3 are matched with one end of the connector 19 through a key groove, and the other end of the connector 19 is sleeved with the lead screw 6 and fixed through a bolt.
A first lead screw nut 18 and a second lead screw nut 16 are respectively sleeved outside the lead screw 6 between the fixed support 12 and the lead screw fixed support 4 and between the fixed support 12 and the servo motor and speed reducer assembly 3 through threads to form a lead screw nut pair, the first lead screw nut 18 and the second lead screw nut 16 are respectively fixedly sleeved on a first nut end block 7 and a second nut end block 13, and the first nut end block 7 and the second nut end block 13 are respectively fixed with the first lead screw nut 18 and the second lead screw nut 16 through bolts; the first nut end block 7 and the second nut end block 13 are respectively provided with a drum simulation assembly, and each drum simulation assembly comprises a connecting plate 2, a mounting plate 1 and a simulation tool drum 8; the bottom of the connecting plate 2 is fixedly connected with the first nut end block 7/the second nut end block 13 through bolts, the mounting plate 1 is mounted on the connecting plate 2 through bolts, the simulation tool drum 8 is semi-annular, and the simulation tool drum 8 is fixed on the mounting plate 1; four corners of the workbench 17 are provided with slide rails 15, the slide rails 15 are arranged in parallel, each slide rail 15 is fixed on the workbench 17 through bolts, a slide block 14 is embedded on each slide rail 15 to form a slide rail pair, the slide block 14 is embedded with the slide rails 15 through a T-shaped clamping groove in a matching manner, and the bottom of the connecting plate 2 is connected with the slide block 14 on one side of the workbench 17 through bolts; the servo motor and the speed reducer assembly 3 operate to drive the screw 6 to rotate, and then the screw nut pair drives the connecting plate 2, the mounting plate 1 and the simulation tool drum 8 to horizontally move along the slide rail 15 under the guidance of the slide rail pair.
A displacement measuring plate 25 is installed on the side face of the connecting plate 2 of one of the drum simulation assemblies and is fastened through bolts, a fixed clamping groove 23 is installed on the workbench 17 beside the displacement measuring plate 25, the abrasion displacement sensor 24 is installed in the fixed clamping groove 23 through a side face bolt, and a probe of the abrasion displacement sensor 24 faces the abrasion displacement sensor 24; when the connecting plate moves, the probe of the abrasion displacement sensor 24 contacts and abuts against the displacement measuring plate 25, and the abrasion displacement sensor 24 detects and collects the measured value, so that the abrasion loss is measured and monitored.
The concrete implementation also comprises a wear displacement sensor 24 and a clearance sensor 28 for measuring the detection displacement, a fixed clamping groove 23 for fixing the sensors, a sensor clamping groove 27, a threaded joint 26 and the like. The middle shaft 11 is fixed on a fixed support 12 through a bolt, the mounting block 10 is mounted at the upper end of the middle shaft 11 after penetrating through the mounting plate 1 and the central hole of the connecting plate 2, the drum brake 9 is sleeved outside the mounting block 10 and the middle shaft 11, the mounting hole of the drum brake 9 is aligned with the hole site of the mounting block 10 and fixed through the bolt, and the drum simulation assemblies on the first nut end block 7 and the second nut end block 13 are respectively positioned at two sides of the drum brake 9; as shown in fig. 3, a sensor slot 27 is fixed on the side surface of the simulated tooling drum 8 through a threaded joint 26, a gap sensor 28 is fixed in the sensor slot 27 through a side bolt, and a probe of the gap sensor 28 passes through a through hole of the sensor slot 27 and contacts and abuts against the surface of a friction plate of the drum brake 9. When the brake shoes of the drum brake 9 are moved, the clearance sensor 28 measures the distance between the pickup probe and the friction plates of the drum brake 9 as the maximum movement displacement of the brake shoes.
The thread turning directions of the external threads of the screw rod 6, which are sleeved and connected by the second screw rod nut 16 and the first screw rod nut 18, are opposite, and the thread turning directions of the internal threads of the second screw rod nut 16 and the first screw rod nut 18 are opposite, namely the external threads of the screw rod 6 between the fixed support 12 and the screw rod fixed support 4 and between the fixed support 12 and the servo motor and speed reducer assembly 3 are opposite.
The clearance sensor 28 and the wear displacement sensor 24 are each connected to the external display 22 by wires. The abrasion displacement sensor 24 detects and obtains displacement simulating the movement of the tooling drum 8 away from the friction plate of the drum brake 9 as abrasion loss, and the clearance sensor 28 detects and obtains the distance between the probe and the friction plate of the drum brake 9 as abrasion loss correction of the self-adjusting mechanism of the drum brake 9.
The utility model discloses an implement the working process as follows:
under the working condition of the simulated tooling drum 8, the servo motor and the reducer component 3 operate to drive the screw 6 to rotate, the second screw nut 16 and the first screw nut 18 are driven by different turning threads at two ends of the screw 6 to move separately along the screw 6 in opposite directions, and the two nut end blocks connected with the screw nuts and the drum simulation components connected with the screw nuts respectively move separately.
The simulation tool drums 8 in the drum simulation assemblies are used for simulating an actual brake drum, the simulation tool drums 8 of the drum simulation assemblies on two sides are far away from friction plates of the drum brake 9 to simulate that the actual brake drum is worn by the friction plates of the drum brake 9, so that the distance between the actual brake drum and the friction plates of the drum brake 9 is increased, the abrasion of the friction plates of the drum brake 9 is simulated, and therefore the gap X between the brake shoes of the drum brake 9 and the simulation brake drum 8 is increased.
In the process that the simulation tool drums 8 of the drum simulation assemblies on the two sides are far away from the friction plates of the drum brake 9, the simulation tool drums 8 work normally, and along with the fact that the simulation tool drums 8 are far away, the drum brake 9 adjusts the brake shoes on the two sides to be expanded through the self-adjusting mechanism assemblies of the drum brake 9, so that the positions of the friction plates of the drum brake 9 and the simulation tool drums 8 are adjusted, and the gap value X is made to be in a relatively stable value.
The abrasion displacement sensor 24 measures the displacement of the simulation tool drum 8 in real time, the abrasion loss of the whole system (a brake drum and a friction plate) is simulated, the gap sensor 28 measures the gap X between the simulation tool drum 8 and the friction plate of the drum brake 9, whether the self-adjusting mechanism of the drum brake 9 works normally is tested, therefore, the self-adjusting function of the self-adjusting mechanism of the drum brake 9 is detected, the measurement and the monitoring of the gap are completed simultaneously, and a fluctuation curve of the shoe drum gap and the simulated abrasion loss is displayed on the display 22 according to the detection result and the simulated abrasion loss result.
By observing the curves: the displacement detected by the wear displacement sensor 24 is continuously increased, that is, the wear amount is continuously increased, when the clearance detected by the clearance sensor 28 is in a small stable fluctuation range, the self-adjusting mechanism of the drum brake 9 works normally, and when the clearance detected by the clearance sensor 28 is continuously increased along with the displacement detected by the wear displacement sensor 24 or the fluctuation range is large, the self-adjusting mechanism of the drum brake 9 cannot work normally.
Therefore, the utility model discloses a self-modulation function check out test set can simulate drum brake's brake lining piece and the wearing and tearing of brake drum, carries out self-modulation clearance to drum brake's full stroke and detects, because of need not actual wearing and tearing, and detection cycle is short, can accomplish the detection of a plurality of samples in the time equivalent with the real vehicle test, and to the result summary analysis again, the reliability of improvement test result further plays real until meaning to the aassessment of improvement to braking performance.
And, the utility model discloses can adjust simulation frock drum according to the specification of different stopper to the self-modulation function that adapts to different specification and dimension's drum brake detects, and testing result is reliable, use extensively, the adjustment is convenient.
The above examples are for the description of the present invention, not for the limitation of the present invention, and any simple modification of the present invention all belongs to the protection scope of the present invention.
Claims (5)
1. The self-adjusting function simulation detection equipment of the drum brake is characterized in that:
the device comprises a servo motor and speed reducer assembly (3), a lead screw (6), a middle shaft (11), a sliding block (14), a sliding rail (15), a workbench (17), a drum simulation assembly, a drum brake (9) and a mounting block (10); the servo motor and speed reducer assembly (3) is fixedly arranged on one side of the workbench (17) through a speed reducer fixing support (20), the lead screw fixing support (4) is fixedly arranged on the other side of the workbench (17), and a fixing support (12) is fixedly arranged on the workbench (17) between the speed reducer fixing support (20) and the lead screw fixing support (4); one end of a screw rod (6) is coaxially connected with the output end of the servo motor and speed reducer assembly (3) through a connector (19), and the other end of the screw rod (6) penetrates through a mounting hole in the middle of the fixed support (12) and is connected to the screw rod fixed support (4) in a supporting manner; a first lead screw nut (18) and a second lead screw nut (16) are respectively sleeved outside a lead screw (6) between a fixed support (12) and a lead screw fixed support (4) and between the fixed support (12) and a servo motor and speed reducer assembly (3) through threads to form a lead screw nut pair, and the first lead screw nut (18) and the second lead screw nut (16) are respectively fixedly sleeved with a first nut end block (7) and a second nut end block (13);
the first nut end block (7) and the second nut end block (13) are respectively provided with a drum simulation component, and each drum simulation component comprises a connecting plate (2), a mounting plate (1) and a simulation tool drum (8); the bottom of the connecting plate (2) is fixedly connected with the first nut end block (7)/the second nut end block (13), the mounting plate (1) is mounted on the connecting plate (2), the simulation tool drum (8) is semi-annular, and the simulation tool drum (8) is fixed on the mounting plate (1); sliding rails (15) are arranged at corners of the workbench (17), a sliding block (14) is embedded in each sliding rail (15) to form a sliding rail pair, and the bottom of the connecting plate (2) is connected with the sliding block (14) of the workbench (17) through bolts; a displacement measuring plate (25) is installed on the side face of a connecting plate (2) of one of the drum simulation assemblies, a fixed clamping groove (23) is installed on a workbench (17) beside the displacement measuring plate (25), an abrasion displacement sensor (24) is installed in the fixed clamping groove (23), and a probe of the abrasion displacement sensor (24) faces the abrasion displacement sensor (24); the middle shaft (11) is fixed on the fixed support (12), the mounting block (10) is mounted at the upper end of the middle shaft (11) after penetrating through the mounting plate (1) and the central hole of the connecting plate (2), the drum brake (9) is sleeved outside the mounting block (10) and the middle shaft (11), and the drum simulation assemblies on the first nut end block (7) and the second nut end block (13) are respectively positioned at two sides of the drum brake (9); the sensor clamping groove (27) is fixed on the side face of the simulation tool drum (8) through the threaded connector (26), the gap sensor (28) is installed and fixed in the sensor clamping groove (27), and a probe of the gap sensor (28) penetrates through a through hole of the sensor clamping groove (27) to be in contact with the surface of a friction plate of the drum brake (9).
2. The self-adjusting function simulation test device of a drum brake as claimed in claim 1, characterized in that: the thread turning directions of the external threads of the screw rod (6) sleeved and connected with the second screw rod nut (16) and the first screw rod nut (18) are opposite, and the thread turning directions of the internal threads of the second screw rod nut (16) and the first screw rod nut (18) are opposite.
3. The self-adjusting function simulation test device of a drum brake as claimed in claim 1, characterized in that: the clearance sensor (28) and the wear displacement sensor (24) are connected to an external display (22) through wires.
4. The self-adjusting function simulation test device of a drum brake as claimed in claim 1, characterized in that: the sliding block (14) is matched and embedded with the sliding rail (15) through the T-shaped clamping groove.
5. The self-adjusting function simulation test device of a drum brake as claimed in claim 1, characterized in that: the servo motor and the reducer assembly (3) are matched with one end of the connector (19) through key grooves, and the other end of the connector (19) is sleeved with the lead screw (6) and fixed through bolts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022884983.3U CN213985017U (en) | 2020-12-04 | 2020-12-04 | Self-adjusting function simulation detection equipment of drum brake |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022884983.3U CN213985017U (en) | 2020-12-04 | 2020-12-04 | Self-adjusting function simulation detection equipment of drum brake |
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| CN213985017U true CN213985017U (en) | 2021-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697421A (en) * | 2020-12-04 | 2021-04-23 | 浙江亚太机电股份有限公司 | Self-adjusting function simulation detection equipment of drum brake |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697421A (en) * | 2020-12-04 | 2021-04-23 | 浙江亚太机电股份有限公司 | Self-adjusting function simulation detection equipment of drum brake |
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