CN112326274A - Automobile detection device capable of changing amplitude and tilting dynamic simulation road test - Google Patents
Automobile detection device capable of changing amplitude and tilting dynamic simulation road test Download PDFInfo
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- CN112326274A CN112326274A CN202011106240.1A CN202011106240A CN112326274A CN 112326274 A CN112326274 A CN 112326274A CN 202011106240 A CN202011106240 A CN 202011106240A CN 112326274 A CN112326274 A CN 112326274A
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- eccentric
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- roller
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
- G01M17/045—Suspension or damping the vehicle wheels co-operating with rotatable rollers
Abstract
The invention provides a variable vibration amplitude tiltable vibration device for dynamically simulating a road test of an automobile, which can dynamically simulate the automobile to detect the faults of a suspension system of a track-seeking automobile at different speeds (including starting, accelerating, braking and backing) and under various road conditions (including rib roads, pothole roads and inclined roads), and the automobile can comprehensively detect the track seeking in a workshop without the road test, the device comprises a frame welded by profile steel and two rollers arranged on the frame, wherein one roller is an unpowered concentric roller, the other roller is an eccentric roller with variable eccentricity, the driving mode can be driven by the self power of the automobile to be detected, and can also be driven by a motor through a belt, the eccentric roller with the variable eccentricity is the core technology of the invention, and wheels on the device are supported by the eccentric roller to vibrate up and down along with the rotation of the eccentric roller, the vibration amplitude of the eccentric roller is changed along with the change of the eccentricity of the eccentric roller, so that various jolts and movements of the automobile road test can be simulated.
Description
Technical Field
The invention belongs to the field of automobile maintenance:
at present, automobile fault diagnosis instruments can be used for diagnosing automobile faults, and are only used for diagnosing systems such as an engine, a gearbox, a circuit and an oil way, and no fault diagnosis instrument capable of digitally diagnosing all system faults of a whole automobile exists, for example, no corresponding fault diagnosis instrument exists when mechanical faults of an automobile suspension system exist.
Background
Various violent traffic accidents are striking and surprised, the factors causing the accidents are various, but the accidents caused by the faults of the automobile suspension system in the accidents are not few, the importance of ensuring the safety and the reliability of the automobile suspension system can be seen, the parts of any equipment are inevitably worn and deformed in the using process, once the parts exceed the limit range, the parts fail, the regular maintenance and the repair are necessary work for ensuring the safety and the reliability of the automobile suspension system, the maintenance work firstly judges the position of a fault point and the fault type (such as loosening, breaking, falling, abrasion, knocking and the like) and can be purposefully maintained, the mechanical fault diagnosis of the automobile suspension system is carried out, as no corresponding fault diagnosis instrument is available, the diagnosis is carried out by the sense experience of people at present, as is well known, at the initial stage of the mechanical fault of the automobile suspension system, the method is characterized in that abnormal sound is often reflected in a driving state, the violent abnormal sound is more obvious when the road jolts, the consequence is dangerous if the fault is not repaired in time, the abnormal sound is often not obvious when the road is in a slightly jolt road driving state, noise interference around the road is also generated, drivers or vehicle-mounted personnel with abundant experience are not easy to detect, the abnormal sound can be detected when the road with rough potholes and ravines is met, but the slight abnormal sound fault is covered, the fault is often misjudged and misjudged by the experience of the people on the vehicle, the mechanical faults are difficult to be found and ignored when the vehicle is in a static state, the vehicle is required to drive to go to a road test when the fault is accurately diagnosed, the fault points are required to be exposed and found on the road under various conditions, and the labor, oil and the misjudgment are also generated, and the misjudgment is wasted, And if the vehicle is driven to go back to the workshop for maintenance, only the fault point judged in the road test is checked and maintained, the fault judged by mistake (no fault is judged to be a fault) is not critical, but the fault judged by mistake cannot be maintained in time, and the vehicle is buried with accident potential.
At present, the vibration simulation devices for detecting the mechanical fault of the automobile suspension system in the society are various, and the vibration simulation devices have pneumatic structures, oil pressure structures, cam structures and the like, but the vibration simulation devices cannot completely simulate the running, braking and backing of the automobile under various road conditions and at different speeds, only can provide a vertical vibration mode for the automobile to detect the suspension system, and have the defects of incomplete detection, difficulty in thorough detection, easiness in missing judgment and the like.
Disclosure of Invention
The invention provides a device (hereinafter referred to as a device) capable of dynamically simulating an automobile road test with variable vibration amplitude and inclinability, which can dynamically simulate the automobile to detect mechanical faults of a track-seeking automobile suspension system by jolting and jumping of the automobile in different speeds (including starting, accelerating, braking and backing) and various road conditions (including rib-laying roads, pothole roads and inclined roads) and can comprehensively detect track seeking in a workshop without the automobile road test, and the device is provided with a frame welded by profile steel, wherein the frame is provided with two rollers, four bearing seats, a motor, a set of belt transmission pair (other transmission pairs can be adopted), a pair of travelling wheels, two adjusting screws, two anti-inclined check rings and two damping rubbers, one of the two rollers is a concentric roller, and the other roller with variable eccentricity (hereinafter referred to as an eccentric roller), the core technology of the device is that two anti-slant check rings are arranged on any one of the eccentric rollers with variable eccentricity.
The wheel of the simulated road test automobile is supported by the eccentric roller and the concentric roller together, the eccentricity of the eccentric roller is variable, the tire on the vibration device is supported by the eccentric roller to roll, vibrate up and down and move back and forth along with the rotation of the eccentric roller, the vibration amplitude and the movement amplitude of the tire are changed along with the change of the eccentricity of the eccentric roller, so the simulated road test automobile can simulate the running of the automobile on various road conditions (including slightly bumpy road conditions and pothole road conditions), because the middle part of the device is transversely provided with a pair of walking rollers which have the functions of supporting points and running, the walking rollers are used as the supporting points, the inclination of the device is adjusted by utilizing adjusting screws at two ends of the frame, the vibration device is like a seesaw, a cross sleeper is padded below one end of the device at the height of the seesaw, so the simulated running of the automobile on an inclined road surface can be simulated, and in order to prevent the automobile from inclining to the, the invention adopts the eccentric roller with a coaxial variable eccentricity structure to provide a vibration source for a detected automobile, the outer circle of the eccentric roller is always attached to the tire tread of the automobile to be diagnosed to enable the wheel to vibrate up and down, and the tire is tightly attached to the roller during detection, so that the generated noise is very small, the fault tracing cannot be interfered, the driving mode is divided into two modes, firstly, the eccentric roller is dragged to rotate by a motor, the tested automobile is in neutral gear, the eccentric roller is a driving roller to drive automobile wheels to roll, the wheels are driven by the power of the automobile, the eccentric roller is driven to rotate by the friction force of tires and the eccentric roller, the eccentric roller is changed into a driven roller, in two driving modes, the concentric roller is always used as the driven roller to support the wheels, the eccentricity of the eccentric roller can be changed only by changing the amplitude of vibration, the operation of changing the eccentricity is simple, the rotation of a motor dragging the eccentric roller is changed only, or the automobile is turned over when the automobile is turned on or off, the automobile simulating a road test can be completely tested without being separated from a vibration device, and the detection work of mechanical faults of an automobile suspension system can be completed completely at one time.
Description of the drawings
Description figure 1 is a block diagram of the present invention.
Description of the drawings fig. 2 is a structural view of a coaxial variable eccentricity drum 7 in accordance with the present invention.
The attached figure 3 in the specification is a schematic diagram of the up-and-down vibration amplitude and the front-and-back movement amplitude of an automobile tire under two eccentricity conditions, the upper half is a schematic diagram of the tire vibration amplitude G and the movement amplitude G when the roller has the maximum eccentricity, the lower half is a schematic diagram of the tire vibration amplitude D and the movement amplitude D when the roller has the minimum eccentricity, and R refers to the radius of the tire.
Description figure 4 is a schematic side view of an automobile during detection, wherein G shows that the centers of wheels are at the peak amplitude relative to the road surface, D shows that the centers of the wheels are at the valley amplitude relative to the road surface, and the vertical vibration amplitude of the whole automobile is (G-D).
Description figure 5 is a schematic diagram of a device for simulating the driving of an automobile on an inclined road by being laid below a raised end of the device into a crosstie.
Detailed Description
The technical scheme adopted by the invention is as follows:
firstly, the device is integrated: the device comprises a frame welded by section steel, wherein the frame is provided with two rollers, four bearing seats, a motor, a set of belt transmission pair, a pair of travelling wheels, two adjusting screws, two anti-oblique sliding check rings, two damping rubbers and the like, one of the two rollers is a powerless concentric roller (hereinafter referred to as concentric roller), the two anti-oblique sliding check rings are arranged on the concentric roller, and the other roller is a coaxial eccentric roller with variable eccentricity (hereinafter referred to as eccentric roller).
Secondly, coaxial variable eccentricity eccentric roller: the core of the invention is composed of an eccentric shaft, an eccentric disc, an outer cylinder, a transverse stirring pin, a longitudinal stirring pin and the like, wherein the eccentricity B of the eccentric shaft is smaller than the eccentricity A of the eccentric disc, the eccentricity of a variable eccentric roller is changed by sliding and rotating the eccentric shaft in different angles (0-180-0 degrees) in holes of the eccentric disc, when the eccentricity directions of the eccentric shaft and the eccentric disc are consistent, the eccentricity of the eccentric roller is superposed, otherwise, the eccentricity of the eccentric roller is the largest, the eccentricity of the eccentric roller is the smallest by subtracting the eccentricities of the eccentric roller, one end of the eccentric shaft is transversely drilled with a hole into which the transverse stirring pin is inserted, one end of the eccentric disc is drilled with two holes around the edge of the eccentric hole, the distances from the two holes to the center of the eccentric hole are equal, one longitudinal stirring pin is respectively inserted into the two holes, the two eccentric discs are welded at the two ends of the outer cylinder into a whole, and, the eccentric shaft can slide in an eccentric hole of the eccentric disc and can rotate 180 degrees, when the eccentric shaft rotates anticlockwise, the transverse stirring pin stirs the longitudinal stirring pin on the eccentric disc, the eccentric roller rotates anticlockwise with one eccentricity H, otherwise when the eccentric shaft rotates clockwise 180 degrees, the transverse stirring pin stirs the other longitudinal stirring pin on the eccentric disc, the eccentric roller rotates clockwise with the other eccentricity H, and the eccentricity of the eccentric roller can be changed only by changing the steering of the eccentric roller.
The device is used for detecting mechanical faults of the automobile suspension system, two sets of the same devices are required to be used for front wheels and rear wheels, and the driving motors of the two sets of the same devices share one frequency converter (one drives two) to enable the two sets of the devices to be synchronous.
The invention is described in detail below with reference to figures 1, 2 and 3:
working principle of the device
In the attached figure 1, four bearing seats 11 on a frame 10 support an eccentric roller 7 and a concentric roller 9, a motor 12 transmits power to the eccentric roller 7 through a belt transmission pair 13, the eccentric roller 7 and the concentric roller 9 support a tire 8, when the eccentric roller 7 rotates to drive the tire 8 to rotate, or the tire 8 rotates to drive the eccentric roller 7 to rotate, the tire 8 is supported by the eccentric roller 7 to vibrate, the eccentricity of the eccentric roller 7 determines the vibration amplitude and the front-back movement amplitude of the tire 8, the vibration amplitude and the movement amplitude of the tire 8 can be changed by changing the eccentricity of the eccentric roller 7, the vibration and movement states of slight jolt and violent jolt during a road test of an automobile can be simulated by using different eccentricities of the eccentric roller 7, and the inclination can be adjusted by using a pair of walking rollers 14 as supporting points and adjusting screw rods 15 at two ends of the frame 10, the two anti-inclined-slip retaining rings 16 can prevent the detected automobile from inclining and slipping to the lower part when the inclined road surface is simulated, and the damping rubber strip 17 can play a role in damping, increasing the friction force between the frame 10 and the ground and reducing the displacement.
Working principle of coaxial variable-eccentricity roller
In the attached figure 2, the eccentric shaft 1 inserted with the horizontal stirring pin 2 rotates in the eccentric hole of the eccentric disc 5, because of being limited by the two longitudinal stirring pins 3 and 4 on the eccentric disc 5, the eccentric shaft 1 can only rotate less than 180 degrees in the eccentric hole, the central vertical line of the eccentric disc 5 is overlapped with the central vertical line of the eccentric shaft 1, the central point of the eccentric disc 5 is taken as the center of a circle, the 12 o 'clock direction is 0 degree, the 6 o' clock direction is 180 degrees, the eccentric directions of the eccentric disc 5 and the eccentric shaft 1 are set to have the initial angle of 0 degree, the end angle of 180 degrees, the eccentricity of the eccentric disc 5 is A, the eccentricity of the eccentric shaft 1 is B, when the eccentric directions of the eccentric disc 5 and the eccentric shaft 1 are both in the direction angle of 0 degrees, the eccentricity H of the eccentric roller 7 is the largest (H is A + B), when the eccentric direction of the eccentric disc 5 is 0 degree, and the eccentricity direction of the eccentric shaft 1, the eccentricity H of the eccentric roller 7 is minimum (H is a-B), and the relative angle between the eccentric shaft 1 and the eccentric disc 5 is changed to 0 degrees or 180 degrees, so that the eccentricity H or H of the eccentric roller 7 can be changed, and the vibration amplitude can be changed.
In the attached drawing 3, the eccentric drums 7, the tires 8 and the concentric drums 9 are axially parallel, the tires 8 are pressed between the eccentric drums 7 and the concentric drums 9, the upper half part in the drawing 3 is a schematic diagram of vibration and play of the tires 8 when the eccentric drums 7 have the maximum eccentricity, the tire 8 has the maximum vertical vibration amplitude (tangential distance G) and the maximum front-rear play amplitude (G) so as to simulate a violent bumping state of a vehicle running on a road with a pothole, and the lower half part in the drawing 3 is a schematic diagram of vibration of the tires 8 when the eccentric drums 7 have the minimum eccentricity, and when the eccentric drums 7 have the minimum eccentricity, the tire 8 has the minimum vertical vibration amplitude (tangential distance D) and the minimum front-rear play amplitude (D) so as to simulate a slight bumping state of the vehicle running on a slightly flat road.
Advantageous effects
The invention is not only suitable for automobile repair enterprises, but also very suitable for teaching facilities of automobile maintenance major in high-class schools, originally, the invention gives students the way of judging the mechanical fault of the suspension system, only lets students judge the part where the fault is located by using sense organs according to the automobile live road test, and then gives the students, because the condition (such as abnormal sound) of judging the fault by using sense organs is difficult to be described by using accurate language or characters, most students only can understand accurately, and the other is that the seats can not be limited to take multiple students on the road when the road test is live, if the invention is applied, the school can train the professional trainees for automobile maintenance with low cost, high quality and high efficiency in the teaching of the project of automobile suspension system maintenance.
Claims (3)
1. The variable amplitude inclinable dynamic simulation automobile road test's vibrator, characterized by:
on a frame welded by section steel, two rollers are longitudinally installed, one roller is a powerless concentric roller, the other roller is a coaxial eccentric roller with variable eccentricity, the motor installed on the frame is driven by a belt transmission pair, wheels of a simulated road test automobile are supported by the two rollers to vibrate up and down and move back and forth, the eccentricity of the eccentric roller with variable eccentricity can be changed without other steps only by changing the steering (forward rotation or reverse rotation) of the coaxial eccentric roller with variable eccentricity, thereby changing the amplitude of the vertical vibration and the front and back movement of the wheels of the simulated road test automobile supported by the wheels, a pair of rollers which play the roles of movement and supporting points are transversely arranged in the middle of the frame, the whole vibration device can incline left and right like a seesaw by taking the roller as a fulcrum through the adjusting screw rods at the two ends of the frame, so that the automobile can simulate to run on an inclined road surface.
2. In order to prevent the automobile which simulates running on an inclined road surface from obliquely sliding downwards, one of the two rollers is provided with an anti-oblique sliding check ring at the left and the right respectively so as to prevent the automobile from obliquely sliding out of the vibration device.
3. The eccentric drum with coaxial variable eccentricity consists of eccentric shaft, transverse shifting pin, longitudinal shifting pin, eccentric disc and outer cylinder, and has eccentricity smaller than that of the eccentric disc and changed by sliding the eccentric shaft in the hole of the eccentric disc by 0-180-0 deg.c, the eccentric shaft and the eccentric disc have the same eccentricity and the maximum eccentricity, and the eccentric shaft has the same eccentricity and the minimum eccentricity, and the transverse shifting pin shifts one longitudinal shifting pin on the eccentric disc to make the eccentric disc and the outer cylinder rotate anticlockwise with one eccentricity, or clockwise rotates the eccentric shaft shifts the other longitudinal shifting pin on the eccentric disc, the eccentric disc and the outer cylinder welded on the eccentric disc are driven to rotate clockwise with another eccentricity, and the forward and reverse rotation of the eccentric cylinder is controlled by a motor or the forward and reverse gear shifting of the automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011106240.1A CN112326274A (en) | 2020-10-13 | 2020-10-13 | Automobile detection device capable of changing amplitude and tilting dynamic simulation road test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011106240.1A CN112326274A (en) | 2020-10-13 | 2020-10-13 | Automobile detection device capable of changing amplitude and tilting dynamic simulation road test |
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| CN112326274A true CN112326274A (en) | 2021-02-05 |
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| CN202011106240.1A Pending CN112326274A (en) | 2020-10-13 | 2020-10-13 | Automobile detection device capable of changing amplitude and tilting dynamic simulation road test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702074A (en) * | 2021-07-31 | 2021-11-26 | 浙江哈克雷斯传动科技有限公司 | New energy automobile frame vibration test device |
| CN113834672A (en) * | 2021-11-24 | 2021-12-24 | 临沂星源电子衡器有限公司 | Suspension mechanism detection device based on automobile performance test |
| CN114112263A (en) * | 2021-11-19 | 2022-03-01 | 西安航空学院 | Vibration testing device capable of adjusting automobile posture |
-
2020
- 2020-10-13 CN CN202011106240.1A patent/CN112326274A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702074A (en) * | 2021-07-31 | 2021-11-26 | 浙江哈克雷斯传动科技有限公司 | New energy automobile frame vibration test device |
| CN114112263A (en) * | 2021-11-19 | 2022-03-01 | 西安航空学院 | Vibration testing device capable of adjusting automobile posture |
| CN114112263B (en) * | 2021-11-19 | 2023-08-04 | 西安航空学院 | Vibration testing device capable of adjusting automobile posture |
| CN113834672A (en) * | 2021-11-24 | 2021-12-24 | 临沂星源电子衡器有限公司 | Suspension mechanism detection device based on automobile performance test |
| CN113834672B (en) * | 2021-11-24 | 2022-03-11 | 临沂星源电子衡器有限公司 | Suspension mechanism detection device based on automobile performance test |
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Effective date of registration: 20230428 Address after: Hainan Agricultural and Forestry Science and Technology School, No. 9 Hebei East Road, Wuzhishan City, Hainan Province, 572299 Applicant after: Zeng Shuai Address before: 572000 Hainan Sanya technician college, lizhigou, Jiyang District, Sanya City, Hainan Province Applicant before: Hainan Sanya Technician College |