CN114166533A - Composite auxiliary spring simulation loading bench test device and test method - Google Patents
Composite auxiliary spring simulation loading bench test device and test method Download PDFInfo
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- CN114166533A CN114166533A CN202111230315.1A CN202111230315A CN114166533A CN 114166533 A CN114166533 A CN 114166533A CN 202111230315 A CN202111230315 A CN 202111230315A CN 114166533 A CN114166533 A CN 114166533A
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- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 238000004088 simulation Methods 0.000 title claims description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- 230000003068 static effect Effects 0.000 claims description 9
- 230000002238 attenuated effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000012417 linear regression Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000009661 fatigue test Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
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- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
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Abstract
The invention provides a test device and a test method for a loading bench for simulating a composite auxiliary spring, which simulate the actual driving road condition of an automobile by controlling the load output of a hydraulic linear actuating mechanism and detect the rigidity performance and the fatigue performance of the composite auxiliary spring.
Description
Technical Field
The invention relates to the technical field of auxiliary spring test devices, in particular to a composite auxiliary spring simulation loading bench test device and a test method
Background
Leaf springs are one of the important parts constituting an automotive suspension system, and the conventional leaf springs are collectively called leaf springs, and are made of steel materials, and are used as elastic members in various forms on various vehicles. The composite material plate spring is made of glass fiber reinforced materials instead of metal materials, the mass of the manufactured part body is far lower than that of a metal plate spring, the overall structural design of the suspension can be optimized, the safety is enhanced, and the light weight is realized.
The main-auxiliary type composite plate spring is characterized in that on the basis of an original main-auxiliary type spring plate spring structure, the composite plate spring is adopted to replace an original auxiliary plate spring, the main spring is realized to adopt a traditional plate spring, and the auxiliary spring is of a composite structure made of composite materials. Its advantages are full use of material and light weight.
At present, a bench test of a composite material auxiliary spring bench and a main spring are separately carried out, a common bench adopts a tool fixture which is universal with a steel plate spring, and the failure form and the fatigue life of the bench test are greatly different from those of a real vehicle road. In addition, the composite auxiliary spring cannot be broken instantly like a steel plate spring, and is judged mainly by observing the fiber layering condition, so that certain subjectivity exists.
Disclosure of Invention
The invention provides a composite auxiliary spring simulation loading bench test device which simulates the actual driving road condition of an automobile and detects the rigidity performance and fatigue performance of a composite auxiliary spring by controlling the load output of a hydraulic linear actuating mechanism.
The technical scheme includes that the device comprises a linear actuating mechanism, a connecting mechanism, U-shaped bolts, gasket type load sensors and two groups of supporting seats, wherein the lower end of the linear actuating mechanism is an actuating end and can provide vertical downward pressure and upward pulling force, the connecting mechanism is connected with the actuating end of the linear actuating mechanism, two ends of each U-shaped bolt are respectively connected with the connecting mechanism, two ends of each U-shaped bolt are respectively sleeved with one group of gasket type load sensors, and the two groups of supporting seats are respectively arranged on two sides of the lower area of each U-shaped bolt and used for supporting two ends of a composite auxiliary spring.
Further, the straight line actuates the mechanism and is hydraulic actuator, coupling mechanism includes upper junction plate, lower connecting plate, double-end screw, nut and cushion, upper junction plate and hydraulic actuator's action end fixed connection, lower connecting plate and U-shaped bolted connection, upper and lower connecting plate parallel arrangement, and upper junction plate and lower connecting plate pass through many double-end screw and be connected, and the double-end screw both ends are respectively through nut locking, all overlap on the double-end screw district section between upper junction plate and the lower connecting plate and be equipped with the cushion of taking central through-hole.
Further, be equipped with four bolt mounting holes on the connecting plate down, be the matrix and distribute, two U-shaped bolt upper ends correspond four bolt mounting holes from bottom to top respectively, the both ends of U-shaped bolt are respectively overlapped and are equipped with a gasket type load sensor, locate connecting plate upper surface down, and U-shaped bolt upper end overlaps and is equipped with the nut, gasket type load sensor passes through top nut locking.
Furthermore, the two U-shaped bolts are arranged in parallel, the axial directions of the end parts of the two U-shaped bolts are parallel to each other, four bolt mounting holes formed in the lower connecting plate are long holes, and the length direction of the long holes is along the arrangement direction of the U-shaped bolts.
Further, be equipped with loading upper cover plate and loading lower cover plate on the U-shaped bolt, the loading upper cover plate is located connecting plate below down, is equipped with four through-holes on the loading upper cover plate, rather than four bolt mounting holes one-to-one on the lower connecting plate of top, the loading upper cover plate overlaps through four through-holes and is established on two U-shaped bolts, the loading lower cover plate is located in the U-shaped bolt, and both ends are lapped respectively and are established the circular-arc flexion inboard in U-shaped bolt bottom, the upper surface of loading lower cover plate is the plane, and the lower surface is the face of cylinder, can agree with the circular-arc flexion medial surface in U-shaped bolt bottom, the flat straight section in central authorities of combined material auxiliary spring is located between loading upper cover plate and the loading lower cover plate.
The supporting seat comprises a bottom plate, two vertical plates and a pin shaft, the two vertical plates are vertically fixed on the bottom plate and are parallel to each other, grooves are formed in the tops of the two bottom plates, the cross sections of the grooves are of semicircular structures, the two ends of the pin shaft are respectively overlapped in the grooves in the tops of the two vertical plates, two groups of supporting seats are respectively arranged right below the two ends of the auxiliary spring made of the composite material, the two pin shafts are parallel to each other and are located on the same horizontal plane, and the axis direction of the pin shaft is perpendicular to the arrangement direction of the two U-shaped bolts.
The invention also provides a composite auxiliary spring simulation loading bench test method, which comprises the following steps:
(1) the method comprises the following steps of simulating loading of a composite auxiliary spring by using a U-shaped bolt, wherein two ends of the composite auxiliary spring are respectively lapped on a pin shaft capable of freely rotating;
(2) the upper end of the U-shaped bolt is fixedly connected with the action end of the linear actuating mechanism through a connecting mechanism;
(3) the actuating end of the linear actuating mechanism loads the composite auxiliary spring downwards until the composite auxiliary spring is loaded to the maximum test load, and then the composite auxiliary spring is unloaded to the initial load;
(4) deriving the data acquired in the process from the data acquisition device to obtain the static rigidity value of the plate spring;
(5) calculating the pre-deformation value S and the sum amplitude S of the auxiliary springa：
Maximum stress sigma of auxiliary spring according to given specificationmAnd stress amplitude sigmaaWhen a bench test is performed, there are
Specific stress
Amplitude of vibration
L-auxiliary spring effective length, C-auxiliary spring rigidity, n-auxiliary spring number, b-auxiliary spring width and h-auxiliary spring thickness;
pre-deformation value
Starting the linear actuating mechanism to work according to the amplitude value and the pre-deformation value, and driving the auxiliary spring to perform a fatigue test;
(6) and (3) stopping the auxiliary spring every 1 ten thousand times of vibration (one time when any point on the auxiliary spring vibrates to form a sine wave), detecting the real-time rigidity value of the auxiliary spring according to the steps (1) - (4), and judging that the auxiliary spring made of the composite material fails when the real-time rigidity value is attenuated by more than 10% compared with the static rigidity value in the step (4), wherein the corresponding vibration times of the auxiliary spring are the fatigue life times of the auxiliary spring.
Further, in the step (4), a rectangular coordinate system is established, the X axis is the displacement value of the auxiliary spring, the Y axis is the load value borne by the auxiliary spring, linear regression processing is performed on the collected loading process data and unloading process data to obtain a linear straight line, and the slope of the straight line is the static stiffness value of the leaf spring.
Furthermore, in the step (1), a washer type load sensor is sleeved below a nut of the U-shaped bolt and used for monitoring the torque attenuation condition of the U-shaped bolt in real time, and when the torque is attenuated by 10%, the U-shaped bolt is restarted after the U-shaped bolt needs to be stopped and tightened.
The invention has the beneficial effects that:
1. through set up the slot hole that is used for installing the U-shaped bolt on lower connecting plate for whole equipment can be applicable to the test of unidimensional leaf spring.
2. The gasket type load sensor is arranged between the U-shaped bolt and the nut, so that the torque change of the U-shaped bolt can be monitored in real time, the torque consistency of 4 bolts is ensured during clamping, and the early damage of the auxiliary spring made of the composite material due to overlarge or unbalanced torque is prevented; when the rack test is carried out, the nut can be tightened in time when the torque is attenuated, and the precision of the test result is ensured.
3. In the technical scheme, the loading cover plate and the U-shaped bolt are adopted for bench test to simulate the actual driving road condition of the automobile, so that the failure mode of the plate spring is close to the actual driving state, and the precision of the test result is ensured.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 and 3 are schematic views showing the assembly structure of the connecting mechanism, the U-bolt and the auxiliary spring according to the present invention.
Fig. 4 is a schematic structural view of the lower connecting plate of the present invention.
Fig. 5 is a linear regression graph in step (4) of the test method of the present invention, in which the stiffness values of the k composite auxiliary spring are shown.
Detailed Description
The following describes in detail an embodiment of the composite auxiliary spring loading simulation bench test device according to the present invention with reference to the accompanying drawings.
As shown in fig. 1, the structure of this embodiment includes a linear actuator, a connecting mechanism, two U-bolts 3, two gasket type load sensors 205 and a support seat 4, the lower end of the linear actuator is an actuating end capable of providing vertical downward pressure and upward pulling force, the connecting mechanism is connected to the actuating end of the linear actuator, two ends of the U-bolts 3 are respectively connected to the connecting mechanism, two ends of the U-bolts 3 are respectively sleeved with one set of gasket type load sensors 205, and two sets of support seats 4 are respectively disposed on two sides of the lower region of the U-bolts 3 for supporting two ends of the auxiliary spring 6 made of composite material.
In this embodiment, the linear actuator is a hydraulic actuator 1, the connecting mechanism includes an upper connecting plate 204, a lower connecting plate 203, a stud 201, a nut and a cushion block 202, the upper connecting plate 204 is fixedly connected with an actuating end of the hydraulic actuator 1, the lower connecting plate 203 is connected with a U-shaped bolt 3, the upper and lower connecting plates 203 are arranged in parallel, the upper connecting plate 204 is connected with the lower connecting plate 203 through a plurality of stud 201, two ends of the stud 201 are respectively locked through nuts, and the section of the stud 201 between the upper connecting plate 204 and the lower connecting plate 203 is sleeved with the cushion block 202 with a central through hole.
In this embodiment, four bolt mounting holes 206 are formed in the lower connecting plate 203 and distributed in a matrix form, the upper ends of the two U-shaped bolts 3 respectively penetrate through the four bolt mounting holes 206 from bottom to top, a gasket type load sensor 205 is sleeved at each of the two ends of each U-shaped bolt 3 and is arranged on the upper surface of the lower connecting plate 203, a nut is sleeved at the upper end of each U-shaped bolt 3, and the gasket type load sensor 205 is locked by the nut above.
In the present embodiment, the two U-bolts 3 are arranged in parallel, the axial directions of the ends of the two U-bolts 3 are parallel to each other, and the four bolt mounting holes 206 formed in the lower connecting plate 203 are long holes, the length direction of which is along the arrangement direction of the U-bolts 3.
In this embodiment, an upper car-loading cover plate 7 and a lower car-loading cover plate 8 are arranged on the U-shaped bolts 3 (in this embodiment, the upper and lower car-loading cover plates are arranged to simulate the rigidity of the auxiliary spring during actual car loading), the upper car-loading cover plate 7 is arranged below the lower connecting plate 203, four through holes are arranged on the upper car-loading cover plate 7 and correspond to four bolt mounting holes 206 on the lower connecting plate 203 above the upper car-loading cover plate one by one, the upper car-loading cover plate 7 is sleeved on the two U-shaped bolts 3 through the four through holes, the lower car-loading cover plate 8 is arranged in the U-shaped bolts 3, two ends of the lower car-loading cover plate 7 are respectively arranged inside the arc-shaped bending portions at the bottoms of the U-shaped bolts 3, the upper surface of the lower car-loading cover plate 8 is a plane, the lower surface of the upper car-loading cover plate is a cylindrical surface and can be fitted with the inner side surfaces of the arc-shaped bending portions at the bottoms of the U-shaped bolts 3, and the central straight section of the auxiliary spring 6 made of the composite material is arranged between the upper car-loading cover plate 7 and the lower car-loading cover plate 8.
In this embodiment, the supporting seat 4 includes a bottom plate 402, two risers 401 and a round pin axle 5, two risers 401 vertical fixation are on bottom plate 402, and be parallel to each other, two bottom plate tops are equipped with the recess, the recess cross-section is semi-circular structure, the round pin axle both ends are set up respectively in the recess at two riser tops, two sets of supporting seats 4 are located the vice spring of combined material 6 both ends respectively under, two round pin axles are parallel and are located same horizontal plane, the axis direction of round pin axle perpendicular to two U-shaped bolt 3's the array orientation.
The following describes in detail embodiments of the test method according to the present invention by describing the working principle of the above-described structure.
The structure mainly outputs load to the composite auxiliary spring through the linear actuating mechanism (in the embodiment, the hydraulic actuator is used as the linear actuating mechanism) so as to simulate the load on the automobile under the actual driving road condition.
In the specific implementation process, the composite auxiliary spring is assembled and clamped by using structures such as a U-shaped bolt, a loading upper cover plate, a loading lower cover plate and the like, loading is simulated, and two ends of the composite auxiliary spring are respectively lapped on a pin shaft which can freely rotate. The U-shaped bolt is fixedly connected with the action end of the linear actuating mechanism through the connecting mechanism, and the linear actuating mechanism outputs load to the auxiliary spring through the U-shaped bolt.
The process is the installation process of the device and the auxiliary spring, and the test process is as follows:
the method comprises the steps of firstly loading the composite auxiliary spring to the maximum set test load through a linear actuating mechanism, and then unloading the load to the initial value. Deriving the data collected in the test from a data acquisition device, establishing a rectangular coordinate system, and processing the data: and performing linear regression processing on the acquired loading process data and unloading process data to obtain a linear straight line, wherein the slope of the straight line is the static stiffness value of the auxiliary spring.
After the static rigidity value of the auxiliary spring is obtained, the pre-deformation value and the amplitude value of the auxiliary spring can be calculated, and the calculation method comprises the following steps:
maximum stress sigma of auxiliary spring according to given specificationmAnd stress amplitude sigmaaBench tests were performed with the following:
specific stress
Amplitude of vibration
L-auxiliary spring effective length, C-auxiliary spring rigidity, n-auxiliary spring number, b-auxiliary spring width and h-auxiliary spring thickness;
pre-deformation value
Starting the linear actuating mechanism to work according to the amplitude value and the pre-deformation value, and driving the auxiliary spring to perform a fatigue test; and (4) stopping the auxiliary spring for 1 ten thousand times (one time when any point on the auxiliary spring vibrates to form a sine wave), and judging that the composite material auxiliary spring has failed when the real-time rigidity value is attenuated by more than 10% compared with the static rigidity value in the step (4), wherein the corresponding vibration times of the auxiliary spring are the fatigue life times of the auxiliary spring.
In the process, a washer type load sensor is sleeved below a nut of the U-shaped bolt and is mainly used for monitoring the torque attenuation condition of the U-shaped bolt in real time. When the torque attenuation reaches 10%, shutdown treatment is needed, and the U-shaped bolt is restarted after the nut is tightened again. The process can effectively ensure the accuracy of the test data.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a combined material auxiliary spring simulation loading bench test device which characterized in that: the device comprises a linear actuating mechanism, a connecting mechanism, two groups of U-shaped bolts, gasket type load sensors and a supporting seat, wherein the lower end of the linear actuating mechanism is an actuating end and can provide vertical downward pressure and upward pulling force, the connecting mechanism is connected with the actuating end of the linear actuating mechanism, the two ends of each U-shaped bolt are respectively connected with the connecting mechanism, a group of gasket type load sensors are respectively sleeved at the two ends of each U-shaped bolt, and the supporting seat is divided into two groups and arranged on the two sides of the lower area of each U-shaped bolt and used for supporting the two ends of a composite auxiliary spring.
2. The composite auxiliary spring loading bench test device of claim 1, wherein: the straight line actuates the mechanism and is hydraulic actuator, coupling mechanism includes upper junction plate, lower connecting plate, double threaded screw, nut and cushion, upper junction plate and hydraulic actuator's action end fixed connection, lower connecting plate and U-shaped bolted connection, upper and lower connecting plate parallel arrangement, and upper junction plate and lower connecting plate pass through many double threaded screw and be connected, and the double threaded screw both ends are respectively through nut locking, all overlap the cushion that is equipped with central through-hole on the double threaded screw district section between upper junction plate and the lower connecting plate.
3. The composite auxiliary spring loading bench test device of claim 2, wherein: be equipped with four bolt mounting holes on the connecting plate down, be the matrix and distribute, two U-shaped bolt upper ends correspond respectively from bottom to top and pass four bolt mounting holes, the both ends of U-shaped bolt are respectively overlapped and are equipped with a gasket formula load sensor, locate connecting plate upper surface down, and U-shaped bolt upper end cover is equipped with the nut, gasket formula load sensor passes through top nut locking.
4. The composite auxiliary spring loading bench test device of claim 3, wherein: the two U-shaped bolts are arranged in parallel, the axial directions of the end parts of the two U-shaped bolts are parallel to each other, four bolt mounting holes formed in the lower connecting plate are long holes, and the length direction of the long holes is along the arrangement direction of the U-shaped bolts.
5. The composite auxiliary spring loading bench test device of claim 4, wherein: the upper cover plate of the loading device is arranged on the U-shaped bolt and is in one-to-one correspondence with four bolt mounting holes in the lower connecting plate above the upper cover plate of the loading device, the upper cover plate of the loading device is sleeved on the two U-shaped bolts through the four through holes, the lower cover plate of the loading device is arranged in the U-shaped bolt, two ends of the lower cover plate of the loading device are respectively arranged on the inner sides of the arc-shaped bent parts at the bottoms of the U-shaped bolts, the upper surface of the lower cover plate of the loading device is a plane, the lower surface of the lower cover plate of the loading device is a cylindrical surface and can be matched with the inner side surfaces of the arc-shaped bent parts at the bottoms of the U-shaped bolts, and the central straight section of the auxiliary spring made of the composite material is arranged between the upper cover plate of the loading device and the lower cover plate of the loading device.
6. The composite auxiliary spring loading bench test device of claim 5, wherein: the supporting seat comprises a bottom plate, two vertical plates and a pin shaft, the two vertical plates are vertically fixed on the bottom plate and are parallel to each other, grooves are formed in the tops of the two bottom plates, the cross sections of the grooves are of semicircular structures, the two ends of the pin shaft are respectively overlapped in the grooves in the tops of the two vertical plates, two groups of supporting seats are respectively arranged right below the two ends of the auxiliary spring made of the composite material, the two pin shafts are parallel to each other and are located on the same horizontal plane, and the axis direction of the pin shaft is perpendicular to the arrangement direction of the two U-shaped bolts.
7. A test method for a composite auxiliary spring simulation loading rack is characterized by comprising the following steps:
(1) the method comprises the following steps of simulating loading of a composite auxiliary spring by using a U-shaped bolt, wherein two ends of the composite auxiliary spring are respectively lapped on a pin shaft capable of freely rotating;
(2) the upper end of the U-shaped bolt is fixedly connected with the action end of the linear actuating mechanism through a connecting mechanism;
(3) the actuating end of the linear actuating mechanism loads the composite auxiliary spring downwards until the composite auxiliary spring is loaded to the maximum test load, and then the composite auxiliary spring is unloaded to the initial load;
(4) deriving the data acquired in the process from the data acquisition device to obtain the static rigidity value of the auxiliary spring;
(5) calculating the pre-deformation value S and the sum amplitude S of the auxiliary springa：
Maximum stress sigma of auxiliary spring according to given specificationmAnd stress amplitude sigmaaWhen a bench test is performed, there are
Specific stress
Amplitude of vibration
L-auxiliary spring effective length, C-auxiliary spring rigidity, n-auxiliary spring number, b-auxiliary spring width and h-auxiliary spring thickness;
pre-deformation value
Starting the linear actuating mechanism to work according to the amplitude value and the pre-deformation value, and driving the auxiliary spring to perform a fatigue test;
(6) and (3) stopping the auxiliary spring every 1 ten thousand times of vibration, detecting the real-time rigidity value of the auxiliary spring according to the modes of the steps (1) to (4), and judging that the auxiliary spring made of the composite material fails when the real-time rigidity value is attenuated by more than 10% compared with the static rigidity value in the step (4), wherein the corresponding vibration frequency of the auxiliary spring is the fatigue life frequency of the auxiliary spring.
8. The composite auxiliary spring simulated loading bench test method of claim 7, characterized in that: in the step (4), a rectangular coordinate system is established, the X axis is the displacement value of the auxiliary spring, the Y axis is the load value borne by the auxiliary spring, the collected loading process data and unloading process data are subjected to linear regression processing, a linear straight line is obtained, and the slope of the straight line is the static rigidity value of the auxiliary spring.
9. The composite auxiliary spring simulated loading bench test method of claim 8, characterized in that: in the step (1), a washer type load sensor is sleeved below a nut of the U-shaped bolt and used for monitoring the torque attenuation condition of the U-shaped bolt in real time, and when the torque is attenuated by 10%, the U-shaped bolt is restarted after the U-shaped bolt needs to be stopped and tightened.
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| CN202111230315.1A CN114166533B (en) | 2021-10-21 | 2021-10-21 | Composite auxiliary spring simulated loading bench test device and test method |
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| CN202111230315.1A CN114166533B (en) | 2021-10-21 | 2021-10-21 | Composite auxiliary spring simulated loading bench test device and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203142333U (en) * | 2013-01-24 | 2013-08-21 | 中国第一汽车股份有限公司 | Rubber auxiliary spring composite rear suspension system |
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| CN107478445A (en) * | 2017-07-25 | 2017-12-15 | 中国第汽车股份有限公司 | The bench test device and test method of the auxiliary spring compound suspension frame system of commercial car rubber |
| WO2018234414A1 (en) * | 2017-06-22 | 2018-12-27 | Hendrickson Commercial Vehicle Systems Europe Gmbh | Method for determining the loading state of a leaf spring |
| CN109269794A (en) * | 2018-11-11 | 2019-01-25 | 张群 | A kind of test method based on leaf springs of car test equipment |
| CN110296820A (en) * | 2019-06-03 | 2019-10-01 | 中国纺织科学研究院有限公司 | A kind of longitudinal composite material plate spring performance testing device and test method |
| CN210401093U (en) * | 2019-05-30 | 2020-04-24 | 上海新力动力设备研究所 | Pressure-shear combined loading test device for flexible joint elastic part material |
-
2021
- 2021-10-21 CN CN202111230315.1A patent/CN114166533B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203142333U (en) * | 2013-01-24 | 2013-08-21 | 中国第一汽车股份有限公司 | Rubber auxiliary spring composite rear suspension system |
| CN104002632A (en) * | 2014-06-10 | 2014-08-27 | 安徽江淮汽车股份有限公司 | Vehicle and plate spring suspension assembly thereof |
| WO2018234414A1 (en) * | 2017-06-22 | 2018-12-27 | Hendrickson Commercial Vehicle Systems Europe Gmbh | Method for determining the loading state of a leaf spring |
| CN107478445A (en) * | 2017-07-25 | 2017-12-15 | 中国第汽车股份有限公司 | The bench test device and test method of the auxiliary spring compound suspension frame system of commercial car rubber |
| CN109269794A (en) * | 2018-11-11 | 2019-01-25 | 张群 | A kind of test method based on leaf springs of car test equipment |
| CN210401093U (en) * | 2019-05-30 | 2020-04-24 | 上海新力动力设备研究所 | Pressure-shear combined loading test device for flexible joint elastic part material |
| CN110296820A (en) * | 2019-06-03 | 2019-10-01 | 中国纺织科学研究院有限公司 | A kind of longitudinal composite material plate spring performance testing device and test method |
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