CN107238503B - Device and method for testing mechanical property of rubber assembly at user end of shock absorber - Google Patents
Device and method for testing mechanical property of rubber assembly at user end of shock absorber Download PDFInfo
- Publication number
- CN107238503B CN107238503B CN201710555626.2A CN201710555626A CN107238503B CN 107238503 B CN107238503 B CN 107238503B CN 201710555626 A CN201710555626 A CN 201710555626A CN 107238503 B CN107238503 B CN 107238503B
- Authority
- CN
- China
- Prior art keywords
- shock absorber
- displacement sensor
- assembly
- force transmission
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention creatively discloses a mechanical property testing device for a rubber assembly at a user end of a shock absorber, which comprises a force bearing base part, a tension pressure sensor, a force transmission frame, a small displacement sensor and an excitation displacement sensor, wherein the small displacement sensor is arranged on the force transmission frame; a tension pressure sensor is fixedly connected below the bearing base piece; the lower part of the tension pressure sensor is fixedly connected with the upper frame of the force transmission frame; the lower frame of the force transmission frame is arranged on the user end of the shock absorber; the small displacement sensor is arranged between the upper frame of the force transmission frame and the shock absorber user side and is used for testing the change of the relative displacement between the upper frame and the shock absorber user side; the excitation displacement sensor is arranged between the lower frame of the force transmission frame and the lower hanging ring of the shock absorber and used for testing the change or relative movement of the relative displacement between the lower frame of the force transmission frame and the lower hanging ring of the shock absorber. The vibration damper assembly moves under the assembly state of a real vehicle and under the excitation of the appointed experimental working condition, and the performances of two rubber assemblies including the installation bush and the lower vibration damping block are simultaneously measured in one experimental cycle by simultaneously measuring the external force and the deformation of the double rubber assemblies.
Description
Technical Field
The invention relates to the field of automotive suspension dynamics testing, in particular to a device and a method for testing mechanical properties of a rubber assembly at a shock absorber user side, which are synchronously performed with an external characteristic test of a shock absorber assembly.
Background
Generally, an automobile suspension shock absorber assembly is connected with an automobile body through the upper end of a piston rod of the automobile suspension shock absorber assembly, so that the upper end of the piston rod of the shock absorber assembly is called a user end, and the bidirectional damping force of the shock absorber assembly is transmitted to the automobile body through the user end. When a vehicle runs, the amplitude of the damping force of the shock absorber assembly and the direction of the damping force are suddenly changed due to factors such as uneven road surface. In order to prevent the shock generated by the sudden change of the damping force to the vehicle body and the occurrence of abnormal noise, the user end of the shock absorber is often connected with the vehicle body through a double rubber assembly (i.e., a mounting bushing assembly 11 and a lower damping block 12 shown in fig. 1) and transmits the damping force, as shown in fig. 1, the currently commonly used double-cylinder double-acting hydraulic shock absorber assembly is composed of a guide sleeve assembly 14, an oil storage chamber 20, a piston rod chamber 18, a piston rod assembly 19, a bottom valve chamber 21, a working cylinder assembly 23, an oil storage cylinder assembly 16 and a lower hanging ring 24. The piston rod assembly 19 is connected with the vehicle body connecting plate 17 in a viscoelastic manner through the locking nut 8, the fastening nut 10, the mounting bushing assembly 11, the lower vibration damping block 12 and the limiting ring 13. In general, the connection end of the piston rod assembly 19 and the vehicle body connecting plate 17 is called "shock absorber assembly user end" in the shock absorber industry, and the user of the shock absorber assembly refers to a vehicle body.
The basic working principle of the shock absorber assembly can be known from the structural diagram shown in fig. 1, in the recovery stroke (the stroke of the wheel far away from the vehicle body), the piston rod cavity 18 is a high-pressure cavity, and the bottom valve cavity 21 is a low-pressure cavity, so that the damping fluid flows into the bottom valve cavity 21 from the piston rod cavity 18; similarly, in the compression stroke (the stroke of the wheel close to the vehicle body), the bottom valve cavity 21 is a high-pressure cavity, the piston rod cavity 18 is a low-pressure cavity, and the damping fluid flows into the piston rod cavity 18 from the bottom valve cavity 21. However, due to the existence of the piston rod 15, the volume change of the two chambers is different, so that a small amount of damping fluid is exchanged between the oil storage chamber 20 and the bottom valve chamber 21 through the compression valve and the compensation valve formed by the two sets of valve plates arranged in the bottom valve plate group. According to fluid mechanics and hydraulic principles, hydraulic damping, namely damping force, is generated when oil flows through a pore under the action of differential pressure, so that the shock absorber generates damping force in the process of restoring and compressing, but according to the working principle and matching relation of an automobile suspension system, the restoring damping force of the shock absorber assembly is 2-3 times of the compressing damping force. When the shock absorber works, the bidirectional damping force of the shock absorber, namely the restoring damping force and the compression damping force, is transmitted to a wheel assembly or an axle assembly through the lower hoisting ring 24; meanwhile, the bidirectional damping force of the shock absorber is also transmitted to the vehicle body through the user end of the piston rod assembly 19, the mounting bushing assembly 11 and the lower damping block 12.
Therefore, the mechanical property of the rubber assembly at the user end affects the connection quality of the shock absorber assembly and the automobile body. Because the rubber belongs to viscoelastic materials, the elastic characteristic and the damping characteristic of the rubber are both nonlinear and closely related to specific working conditions, and the mechanical property of the rubber can be obtained by simultaneously measuring the external force and the deformation quantity for deforming the double-rubber assembly under the specific working conditions.
Disclosure of Invention
The invention aims to provide a device and a test method capable of synchronously measuring the external characteristics of a shock absorber assembly and the mechanical properties of a double-rubber assembly at a shock absorber user end in a real vehicle mounting state, so that the shock absorber assembly moves in the real vehicle mounting state and is excited by a specified experimental working condition, and the external force and the deformation quantity for deforming the double-rubber assembly are measured simultaneously, and the properties of the two rubber assemblies including a mounting bush and a lower damping block are measured simultaneously in one experimental cycle.
The invention adopts the technical scheme that:
the mechanical property testing device for the rubber assembly at the user end of the shock absorber comprises a force bearing base part 1, a tension pressure sensor 2, a force transmission frame 4, a small displacement sensor 7 and an excitation displacement sensor 22;
a tension pressure sensor 2 is fixedly connected below the bearing base part 1;
the pull pressure sensor 2 is used for testing the damping force of the shock absorber assembly, and the lower part of the pull pressure sensor 2 is fixedly connected with the upper frame of the force transmission frame;
the force transmission frame 4 is used for imitating a vehicle body connecting plate, and the lower frame of the force transmission frame is arranged on the user end of the shock absorber, so that the bidirectional damping force of the shock absorber assembly is transmitted to the force transmission frame 4;
the small displacement sensor 7 is arranged between the upper frame of the force transmission frame and the shock absorber user side and is used for testing the change of the relative displacement between the upper frame and the shock absorber user side; these changes in relative displacement are the deformations of the mounting bush 11 or the lower damping mass 12 under the damping force.
The excitation displacement sensor 22 is arranged between the lower frame of the force transmission frame and a lower suspension ring 24 of the shock absorber and is used for testing the change or relative movement of the relative displacement between the lower frame and the lower suspension ring. These relative movements are the movements of the cylinder of the shock absorber assembly relative to the piston, i.e. the movements that cause the shock absorber assembly to generate a damping force; the motion parameters measured by the excitation displacement sensor 22 and the damping force measured by the tension and pressure sensor 2 combine to form the external characteristics of the damper assembly, i.e., the indicator characteristic and the speed characteristic.
The mechanical property testing device for the rubber assembly at the user end of the shock absorber is further provided with a force transmission bolt 3, and the lower part of the tension pressure sensor 2 is fixedly connected with the upper frame of the force transmission frame through the force transmission bolt 3. The bidirectional damping force of the shock absorber is respectively transmitted to the force transmission frame 4 through the mounting bush 11 at the user end of the shock absorber or the lower damping block 12, and an alternating acting force is formed on the force transmission frame 4 along with the restoration and the compression stroke of the shock absorber assembly;
in the device for testing the mechanical property of the rubber assembly at the user end of the shock absorber, the upper end of the small displacement sensor 7 is arranged on an upper frame of a force transmission frame through an upper pull piece 5 and an upper pull piece round nut 6; the lower end of the small displacement sensor 7 is arranged on the lower frame of the force transmission frame or the user end of the shock absorber through a lower pull sheet 9 and a lower pull sheet round nut 31.
According to the mechanical property testing device for the rubber assembly at the user end of the shock absorber, the upper pulling piece 5 is of a Z-shaped plate structure and is provided with a first mounting edge I5.1, a second mounting edge I5.2 and a vertical folding edge I5.3 positioned between the first mounting edge I and the second mounting edge I; the first mounting edge I5.1 is fixedly mounted on the upper frame of the force transmission frame; the upper end of the small displacement sensor is connected to the second mounting edge I5.2, and a reinforcing rib I5.4 is pressed at the part, connected with the upper end of the small displacement sensor, of the second mounting edge I5.2;
the lower pulling piece 9 is of a Z-shaped plate-shaped structure and is provided with a first mounting edge II 9.1, a second mounting edge II 9.2 and a vertical folding edge II 9.3 positioned between the first mounting edge II and the second mounting edge II; the first mounting edge II 9.1 is mounted on the user end of the shock absorber; the lower end of the small displacement sensor is connected to the second mounting edge II 9.2, and a reinforcing rib II 9.4 is pressed at the position, connected with the lower end of the small displacement sensor, on the second mounting edge II 9.2. In order to prevent the deformation of the upper pulling sheet 5 and the lower pulling sheet 9 after being stressed from affecting the testing precision of the small displacement sensor 7, the upper pulling sheet 5 and the lower pulling sheet 9 adopt structural measures for preventing the deformation; the upper pull piece 5 fixedly connects the upper end of the small displacement sensor 7 with the upper part of the force transmission frame 4 and transmits the force in the vertical direction between the upper end of the small displacement sensor and the upper part of the force transmission frame; because the upper pulling piece 5 belongs to a thin plate type part and has poor vertical deformation resistance, the structure of the upper pulling piece 5 needs to be utilized to improve the vertical deformation resistance; similarly, the lower pull piece 9 connects the lower end of the small displacement sensor 7 with the upper end of the piston rod 15, namely the user end, so that the lower end of the small displacement sensor 7 and the upper end of the piston rod 15 realize synchronous motion; the lower pull piece 9 belongs to a thin plate type part, so that the vertical deformation resistance is low; the lower pull tab 9 needs to transmit the acting force between the lower end of the small displacement sensor 7 and the upper end of the piston rod 15, and the inertia force generated when the lower pull tab 9 and the upper end of the piston rod 15 synchronously move can cause the deformation of the lower pull tab 9 in the vertical direction, thereby affecting the testing accuracy of the small displacement sensor 7. Particularly, when the return stroke and the compression stroke or the compression stroke and the return stroke are converted, the lower pull tab 9 is greatly deformed by the reversing inertia force, and therefore, the resistance to deformation in the vertical direction needs to be improved by the structure of the lower pull tab 9.
The mechanical property testing device for the rubber assembly at the shock absorber user end is characterized in that the shock absorber user end is the upper end of a piston rod, the upper end of the piston rod is provided with an installation bushing assembly 11 and a lower damping block 12 which are installed on the piston rod 15, and a lower force transmission frame is installed on the piston rod 15 and located between the installation bushing assembly 11 and the lower damping block 12.
In the mechanical property testing device for the rubber assembly at the user end of the shock absorber, the lower frame of the force transmission frame 4 is provided with a flange structure 4.1 extending outwards, and the upper end of the excitation displacement sensor 22 is connected with the force transmission frame 4 through the flange structure 4.1; the lower end of the excitation displacement sensor 22 is connected to the lower sling 24 via a lower pull tab 28.
According to the mechanical property testing device for the rubber assembly at the user end of the shock absorber, the pull piece 28 under the road condition is of an L-shaped plate-shaped structure and is provided with a first mounting edge III 28.1 and a second mounting edge III 28.2 which are perpendicular to each other, the first mounting edge III 28.1 is mounted on the lower hanging ring 24, and the lower end of the excitation displacement sensor 22 is mounted on the second mounting edge III 28.2; and a reinforcing rib III 28.3 is pressed at the part of the second mounting edge III 28.2 connected with the lower end of the excitation displacement sensor 22. The structure is adopted to avoid the deformation caused by the motion inertia force and the transmission force between the lower end of the excitation displacement sensor 22 and the lower hanging ring 24, and the influence on the test precision of the excitation displacement sensor 22 is avoided.
The mechanical property testing method of the rubber assembly at the user end of the shock absorber adopts the mechanical property testing device of the rubber assembly at the user end of the shock absorber, and specifically comprises the following steps:
a. testing the damping force of the shock absorber assembly by using a pull pressure sensor, wherein the damping force comprises the recovery damping force of the shock absorber and the compression damping force of the shock absorber;
b. meanwhile, the small displacement sensor 7 is utilized to measure the vertical movement of the user end of the shock absorber, namely the deformation of the mounting bush assembly 11 and the lower damping block 12 assembly caused by stress is measured;
c. meanwhile, measuring the vertical motion rule of the lower hoisting ring 24 by using the excitation displacement sensor 22;
the recovery damping force of the shock absorber measured by the tension and pressure sensor 2 and the deformation of the mounting bush assembly 11 measured by the small displacement sensor 7 form the mechanical property of the mounting bush assembly; the shock absorber recovery damping force measured by the tension and pressure sensor 2 and the vertical motion rule of the lower lifting ring measured by the excitation displacement sensor 22 form the external characteristic of the shock absorber recovery stroke;
the compression damping force of the shock absorber measured by the tension and pressure sensor 2 and the deformation of the lower damping block 12 measured by the small displacement sensor 7 form the mechanical property of the lower damping block; the compression damping force of the shock absorber measured by the tension and pressure sensor 2 and the vertical motion rule of the lower hanging ring 24 measured by the excitation displacement sensor 22 form the external characteristic of the compression stroke of the shock absorber.
Therefore, the invention realizes the purpose of simultaneously measuring the performances of two rubber assemblies including the mounting bushing and the lower damping block in an experimental cycle and synchronously measuring the external characteristics of the shock absorber assembly on the premise of ensuring that the external characteristic experimental working condition of the shock absorber assembly and the mechanical property experimental working condition of the rubber assembly at the user end of the shock absorber are synchronously carried out (namely that the external characteristic experiment of the shock absorber assembly and the mechanical property experiment of the rubber assembly at the user end are carried out in the same working condition or the same excitation), so that the dynamic mechanical properties of the double rubber assemblies at the user end of the shock absorber are obtained, the external characteristics of the shock absorber assembly are also obtained simultaneously, the matching rationality of the two characteristics (performances) is also conveniently analyzed, and the testing and evaluating means of the performance of the shock absorber assembly are perfected.
The invention creates the mechanical property testing device of the rubber assembly at the user end of the shock absorber (comprising the mounting bush assembly and the lower damping block assembly), which is not only beneficial to improving the testing efficiency, but also beneficial to the matching analysis of the mounting bush assembly and the lower damping block assembly. The test under the same working condition is also embodied in that the test working condition created by the invention is the same as the experimental working condition of the external characteristic of the shock absorber assembly, namely the test of the mechanical properties of the two rubber assemblies is completed while the external characteristic experiment of the shock absorber assembly is completed. The same working condition test is beneficial to the matching analysis of the mechanical property of the rubber assembly and the external characteristic of the shock absorber assembly. The invention integrates the test of the mechanical property of the rubber assembly and the test of the external property of the shock absorber assembly into a whole, thereby realizing the test of the static and dynamic mechanical properties of the rubber assembly.
Drawings
FIG. 1 is a schematic view of a connection structure of a shock absorber assembly and a vehicle body of an automobile suspension.
Fig. 2 is a schematic view of a connection structure of the piston rod assembly and the vehicle body in fig. 2.
Fig. 3 is a schematic structural diagram of a mechanical property testing device for a rubber assembly at a user end of a shock absorber.
Figure 4 is a schematic view of the force transfer frame 4 of figure 3.
Fig. 5.1 is a schematic view a of the structure of the upper pull tab 5 in fig. 3.
Fig. 5.2 is a schematic view B of the structure of the upper pull tab 5 in fig. 3.
Fig. 6.1 is a schematic view a of the structure of the lower pull tab 9 in fig. 3.
Fig. 6.2 is a schematic view B of the structure of the lower pull tab 9 in fig. 3.
Fig. 7.1 is a diagrammatic view a of the pull tab 9 in the road situation of fig. 3.
Fig. 7.2 is a sketch B of the pull tab 9 under the road conditions in fig. 3.
Fig. 8 is a graph of the mechanical properties of the mounting bushing assembly 11 of fig. 3.
Fig. 9 is a mechanical property curve of the lower damper block 12 of fig. 3.
Wherein 1, the bearing base part; 2-a pull pressure sensor; 3-a force transmission bolt; 4-a force transfer frame; 5-pulling on the pull piece; 6-round nut with pull piece; 7-small displacement sensor; 8-locking the nut; 9-lower pull tab; 10-a fastening nut; 11-mounting a bushing assembly; 12-lower vibration damping block; 13-a limit ring; 14-a guide sleeve assembly; 15-a piston rod; 16-reserve tube assembly; 17-a vehicle body connection plate; 18-a piston rod cavity; 19-a piston rod assembly; 20-an oil storage chamber; 21-bottom valve cavity; 22-exciting displacement sensor; 23-a working cylinder assembly; 24-lower lifting rings; 25-reaming the bolt; 26-road condition excitation head; 27-big nut; 28-pulling piece under road condition; 29-round nut with pull tab under road condition; 30-road condition displacement nut; 31-pull-down piece round nut; 32-a piston; 33-flow-through valve plate set; 34-restoring the valve plate group.
Detailed Description
As shown in fig. 3, the sensor comprises a force bearing base part 1, a tension pressure sensor 2, a force transmission frame 4, a small displacement sensor 7 and an excitation displacement sensor 22.
A pull pressure sensor 2 is fixedly connected below the bearing base part 1; the tension and pressure sensor 2 is a force sensor for testing the damping force of the shock absorber assembly; the lower part of the tension pressure sensor 2 is fixedly connected with the upper frame of the force transmission frame through a force transmission bolt 3; one end of the force transmission bolt is fixedly connected with the tension pressure sensor 2, and the other end of the force transmission bolt penetrates through the upper frame of the force transmission frame and is fixedly connected with the upper frame of the force transmission frame through the force transmission nut. The force transmission frame 4 is used for imitating a vehicle body connecting plate, and the lower frame of the force transmission frame is arranged on the piston rod 15 and is positioned between the mounting bush assembly 11 and the lower vibration damping block 12, namely the mounting position of the vehicle body connecting plate 17. In this way, the bidirectional damping force of the shock absorber is transmitted to the force transmission frame 4 through the piston rod 15, the mounting bush assembly 11 or the lower damping block 12, respectively, and forms an alternating acting force on the force transmission frame 4 along with the restoring and compressing strokes of the shock absorber assembly.
As shown in fig. 3, the small displacement sensor 7 is disposed between the upper frame of the force transmission frame and the user end of the piston rod, and is used for testing the change of the relative displacement between the upper frame and the user end of the piston rod. These changes in relative displacement are the deformations of the mounting bushing assembly 11 or the lower damper mass 12 under the damping force. The upper end of the small displacement sensor 7 is fixedly connected with the upper frame of the force transmission frame 4 through an upper pull piece 5 and an upper pull piece round nut 6; the lower end of the small displacement sensor 7 is fixedly connected with the piston rod 15 or the force transmission frame 4 through the lower pull piece 9 and the lower pull piece round nut 31 respectively.
As shown in fig. 5.1, 5.2, 6.1 and 6.2, the two pull tabs adopt a structural measure for preventing deformation in order to prevent the deformation of the upper pull tab 5 and the lower pull tab 9 after being stressed from influencing the testing precision of the small displacement sensor 7. The upper pull piece 5 fixedly connects the upper end of the small displacement sensor 7 with the upper frame of the force transmission frame and transmits the force in the vertical direction between the upper pull piece and the force transmission frame; as shown in fig. 5.1 and 5.2, the upper pulling piece 5 is of a Z-shaped plate structure, the thickness of the plate is 2mm, and the upper pulling piece is provided with a first mounting edge I5.1, a second mounting edge I5.2 and a vertical folding edge I5.3 positioned between the first mounting edge I and the second mounting edge I; the first mounting edge I5.1 is arranged on the force transmission bolt 3 and is positioned between the force transmission nut and the upper frame of the force transmission frame, and the first mounting edge I5.1 is fastened on the upper frame of the force transmission frame through the force transmission nut; the upper end of the small displacement sensor is connected to the second mounting edge I, and a reinforcing rib I5.4 with enough length is pressed at the part, connected with the upper end of the small displacement sensor, of the second mounting edge I so as to improve the capability of resisting the deformation in the vertical direction; since the upper pull tab 5 belongs to a thin plate type member and has poor vertical deformation resistance, the structure of the upper pull tab 5 as shown in fig. 5.1 and 5.2 is required to be utilized to improve the vertical deformation resistance;
similarly, the lower pull piece 9 connects the lower end of the small displacement sensor 7 with the upper end of the piston rod 15, namely the user end, so that the lower end of the small displacement sensor 7 and the upper end of the piston rod 15 realize synchronous motion; as shown in fig. 6.1 and 6.2, the lower pulling piece 9 is of a Z-shaped plate structure, the thickness of the plate is 2mm, and the lower pulling piece is provided with a first mounting edge ii 9.1, a second mounting edge ii 9.2 and a vertical folding edge ii 9.3 positioned between the first mounting edge ii and the second mounting edge ii; the first mounting edge II 9.1 is mounted on the piston rod 15 and located between the locking nut 8 and the fastening nut 10, and is fastened through the locking nut 8 and the fastening nut 10; the lower end of the small displacement sensor is connected to the second mounting edge II, and a reinforcing rib II 9.4 with enough length is pressed at the part, connected with the lower end of the small displacement sensor, on the second mounting edge II so as to improve the capability of resisting the deformation in the vertical direction; the lower pull piece 9 belongs to a thin plate type part, so that the vertical deformation resistance is low; the lower pull tab 9 needs to transmit the acting force between the lower end of the small displacement sensor 7 and the upper end of the piston rod 15, and the inertia force generated when the lower pull tab 9 and the upper end of the piston rod 15 synchronously move can cause the deformation of the lower pull tab 9 in the vertical direction, thereby affecting the testing precision of the small displacement sensor 7. Particularly, when the return stroke and the compression stroke or the compression stroke and the return stroke are switched, the lower pull tab 9 is greatly deformed by the reversing inertia force, so that the structure of the lower pull tab 9 shown in fig. 6.1 and 6.2 is required to improve the vertical deformation resistance.
As shown in fig. 3, the excitation displacement sensor 22 is disposed between the lower part of the force transmission frame 4 and the suspension ring 24 for testing the change of the relative displacement or the relative movement therebetween. These relative movements are the movements of the cylinder of the shock absorber assembly relative to the piston, i.e. the movements that cause the shock absorber assembly to generate a damping force; the motion parameters measured by the excitation displacement sensor 22 and the damping force measured by the tension and pressure sensor 2 combine to form the external characteristics of the damper assembly, i.e., the indicator characteristic and the speed characteristic.
As shown in fig. 3, the upper end of the excitation displacement sensor 22 is connected with the force transmission frame 4 through a flange structure 4.1 below the force transmission frame 4; the lower end of the excitation displacement sensor 22 is connected with the lower suspension ring 24 through a pull tab 28 under the road condition and a round nut 29 of the pull tab under the road condition. In the same way as described above, under the road condition, the pull tab 28 must adopt the structure shown in fig. 7.1 and 7.2, so as to avoid the deformation of the pull tab due to the motion inertia force and the transmission force between the lower end of the excitation displacement sensor 22 and the hanging ring 24, which affects the testing accuracy of the excitation displacement sensor 22. As shown in fig. 7.1 and 7.2, the under-road pull tab 28 is of an L-shaped plate structure, the thickness of the plate is 2mm, and the under-road pull tab has a first mounting edge iii 28.1 and a second mounting edge iii 28.2 which are perpendicular to each other, a hinged bolt 25 is mounted on the lower hanging ring 24, a road condition excitation head 26 is mounted on the hinged bolt 25, the first mounting edge iii 28.1 of the under-road pull tab 28 is mounted on the hinged bolt 25 and positioned between the lower hanging ring 24 and the road condition excitation head 26, and is fastened through a large nut 27; the lower end of the excitation displacement sensor 22 is arranged on the second mounting edge III 28.2, and a reinforcing rib III 28.3 with enough length is pressed at the connecting part of the lower end of the excitation displacement sensor 22 and the lower hanging ring 24 through the second mounting edge III 28.2 so as to improve the capability of resisting the deformation in the vertical direction.
As shown in fig. 4, a frame reinforcement 4.2 is pressed into the force-transmitting frame 4 to a sufficient length to improve its resistance to deformation.
Adopt above-mentioned shock absorber user side rubber assembly mechanical properties testing arrangement, specifically be:
a. testing the damping force of the shock absorber assembly by using a pull pressure sensor, wherein the damping force comprises the recovery damping force of the shock absorber and the compression damping force of the shock absorber;
b. the small displacement sensor 7 is used for measuring the vertical movement of a piston rod user end to respectively realize the measurement of the stress deformation of the installation bush assembly 11 and the lower vibration damping block 12 assembly;
c. the vertical motion rule of the lower flying ring 24 is measured by using an excitation displacement sensor 22, namely a large displacement sensor, even if the motion rule of a cylinder barrel of the shock absorber generating damping force relative to a piston is measured;
d. the recovery damping force of the shock absorber measured by the tension and pressure sensor 2 and the deformation of the mounting bushing assembly 11 measured by the small displacement sensor 7 form the mechanical property of the mounting bushing assembly, and the mechanical property is static property at low speed, or is dynamic property. Meanwhile, the shock absorber recovery damping force measured by the tension and pressure sensor 2 and the vertical motion rule of the lower hanging ring measured by the excitation displacement sensor 22 form the external characteristic of the shock absorber recovery stroke;
e. the compression damping force of the shock absorber measured by the tension and pressure sensor 2 and the deformation of the lower damping block 12 measured by the small displacement sensor 7 form the mechanical property of the lower damping block 12, and the mechanical property is static at low speed, or dynamic. Meanwhile, the compression damping force of the shock absorber measured by the tension and pressure sensor 2 and the vertical motion rule of the lower hanging ring 24 measured by the excitation displacement sensor 22 form the external characteristic of the compression stroke of the shock absorber.
Fig. 8 shows a performance curve of the mounting bush assembly 11, and the abscissa is a deformation value of the mounting bush assembly 11 under the action of the restoring damping force of the shock absorber, which is measured by the small displacement sensor 7; fig. 9 shows a performance curve of the lower damping mass 12, and the abscissa is a deformation value of the lower damping mass assembly under the action of the compression damping force of the shock absorber, which is measured by the small displacement sensor 7; therefore, the mechanical property of the mounting bush assembly and the lower damping block assembly is tested by adopting the same assembly structure as that of a real vehicle and under the same working condition.
The inventive testing principle is as follows: as mentioned above, the damping force of the shock absorber assembly is mainly generated by the piston 32 and the aperture formed by the flow valve plate set 33 and the restoring valve plate set 34 and acts on the piston rod 15. The restoring damping force acts on the vehicle body connecting plate 17 through the piston 32, the piston rod 15, the locking nut 8 and the mounting bush assembly 11, so that the static and dynamic performances of the mounting bush assembly 11 can be obtained by simultaneously testing the restoring damping force and the compression deformation of the mounting bush assembly 11 caused by the restoring damping force; the compression damping force acts on the vehicle body attachment plate 17 through the piston 32, the piston rod 15, the retainer ring 13, and the lower absorber block 12. In the same way as before, the static and dynamic mechanical properties of the lower damping block 12 can be obtained by simultaneously testing the compression damping force and the compression deformation of the lower damping block 12 caused by the compression damping force.
During the test, the displacement of the lower suspension ring 24 relative to the vehicle body is tested at the same time, so that the restoring damping force and the restoring stroke displacement form the outer characteristic of the restoring stroke of the shock absorber assembly; similarly, the compression damping force and the compression stroke displacement form the external characteristic of the compression stroke of the shock absorber assembly.
In conclusion, because the mechanical property of the mounting bushing assembly 11 and the external characteristics of the shock absorber assembly outside the return stroke are tested simultaneously under the same working condition, the matching rationality of the mounting bushing assembly 11 and the shock absorber assembly can be evaluated by comparing the change rules and researching the mutual relation of the change rules; similarly, the relationship between the mechanical properties of the lower damping mass 12 and the characteristics outside the compression stroke of the shock absorber assembly and the matching reasonableness of the two characteristics can also be evaluated.
Claims (7)
1. The mechanical property testing device for the rubber assembly at the user end of the shock absorber is characterized by comprising a bearing base part (1), a tension pressure sensor (2), a force transmission frame (4), the shock absorber assembly, a small displacement sensor (7) and an excitation displacement sensor (22);
a tension and pressure sensor (2) is fixedly connected below the bearing base piece (1);
the pull pressure sensor (2) is used for testing the damping force of the shock absorber assembly, and the lower part of the pull pressure sensor (2) is fixedly connected with the upper frame of the force transmission frame;
the force transmission frame (4) is used for imitating a vehicle body connecting plate, and the lower frame of the force transmission frame is arranged at the user end of the shock absorber, so that the bidirectional damping force of the shock absorber assembly is transmitted to the force transmission frame (4);
the shock absorber assembly comprises an installation bushing assembly (11) and a lower damping block (12), the installation bushing assembly (11) is located at the lower end part in the frame of the force transmission frame (4), the lower damping block (12) is located at the upper end of a shock absorber user side, and the lower frame of the force transmission frame is clamped between the installation bushing assembly (11) and the lower damping block (12) and transmits damping force;
the small displacement sensor (7) is arranged between the upper frame of the force transmission frame and the shock absorber user side and is used for testing the change of the relative displacement between the upper frame and the shock absorber user side;
the excitation displacement sensor (22) is arranged between the lower frame of the force transmission frame and a lower suspension ring (24) of the shock absorber and used for testing the change or relative movement of the relative displacement between the lower frame and the lower suspension ring.
2. The device for testing the mechanical properties of the rubber assembly at the shock absorber user end according to claim 1, further comprising a force transmission bolt (3), wherein the lower part of the tension and pressure sensor (2) is fixedly connected with the upper frame of the force transmission frame through the force transmission bolt (3).
3. The device for testing the mechanical properties of the rubber assemblies at the user ends of the shock absorbers according to claim 1, wherein the upper end of the small displacement sensor (7) is mounted on an upper frame of a force transmission frame through an upper pull piece (5) and an upper pull piece round nut (6); the lower end of the small displacement sensor (7) is arranged on the user end of the shock absorber through a lower pull sheet (9) and a lower pull sheet round nut (31).
4. The device for testing the mechanical properties of the rubber assembly at the user end of the shock absorber as claimed in claim 3, wherein the upper pulling piece (5) is of a Z-shaped plate structure and is provided with a first mounting edge I (5.1), a second mounting edge I (5.2) and a vertical folding edge I (5.3) positioned between the first mounting edge I and the second mounting edge I; the first mounting edge I (5.1) is fixedly mounted on the upper frame of the force transmission frame; the upper end of the small displacement sensor is connected to the second mounting edge I (5.2), and a reinforcing rib I (5.4) is pressed at the part, connected with the upper end of the small displacement sensor, of the second mounting edge I (5.2);
the lower pulling piece (9) is of a Z-shaped plate structure and is provided with a first mounting edge II (9.1), a second mounting edge II (9.2) and a vertical folding edge II (9.3) positioned between the first mounting edge II and the second mounting edge II; the first mounting edge II (9.1) is mounted on the user end of the shock absorber; the lower end of the small displacement sensor is connected to the second mounting edge II (9.2), and a reinforcing rib II (9.4) is pressed at the part, connected with the lower end of the small displacement sensor, of the second mounting edge II (9.2).
5. The mechanical property testing device for the rubber assemblies at the shock absorber user ends according to claim 1, wherein the lower frame of the force transmission frame (4) is provided with a flange structure (4.1) extending outwards, and the upper end of the excitation displacement sensor (22) is connected with the force transmission frame (4) through the flange structure (4.1); the lower end of the excitation displacement sensor (22) is connected with a lower hanging ring (24) through a road condition lower pulling sheet (28).
6. The mechanical property testing device for the rubber assembly at the user end of the shock absorber as set forth in claim 5, wherein the pull tab (28) under the road condition is of an L-shaped plate structure and has a first mounting edge III (28.1) and a second mounting edge III (28.2) which are perpendicular to each other, the first mounting edge III (28.1) is mounted on the lower suspension ring (24), and the lower end of the excitation displacement sensor (22) is mounted on the second mounting edge III (28.2); and a reinforcing rib III (28.3) is pressed at the connecting part of the second mounting edge III (28.2) and the lower end of the excitation displacement sensor (22).
7. The method for testing the mechanical property of the rubber assembly at the user end of the shock absorber adopts the device for testing the mechanical property of the rubber assembly at the user end of the shock absorber as claimed in any one of claims 1 to 6, and is characterized in that the method specifically comprises the following steps:
a. testing the damping force of the shock absorber assembly by using a pull pressure sensor, wherein the damping force comprises the recovery damping force of the shock absorber and the compression damping force of the shock absorber;
b. meanwhile, the small displacement sensor (7) is utilized to measure the vertical movement of the user end of the shock absorber, namely the deformation of the mounting bush assembly (11) and the lower damping block (12) assembly caused by stress is measured;
c. meanwhile, the vertical motion rule of the lower hoisting ring (24) is measured by using an excitation displacement sensor (22);
the mechanical property of the mounting bush assembly is formed by the rebound damping force of the shock absorber measured by the tension and pressure sensor (2) and the deformation of the mounting bush assembly (11) measured by the small displacement sensor (7); the shock absorber recovery damping force measured by the tension and pressure sensor (2) and the vertical motion rule of the lower lifting ring measured by the shock excitation displacement sensor (22) form the external characteristic of the shock absorber recovery stroke;
the compression damping force of the shock absorber measured by the tension and pressure sensor (2) and the deformation of the lower damping block (12) measured by the small displacement sensor (7) form the mechanical property of the lower damping block; the compression damping force of the shock absorber measured by the tension and pressure sensor (2) and the vertical motion rule of the lower lifting ring (24) measured by the shock excitation displacement sensor (22) form the external characteristic of the compression stroke of the shock absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710555626.2A CN107238503B (en) | 2017-07-10 | 2017-07-10 | Device and method for testing mechanical property of rubber assembly at user end of shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710555626.2A CN107238503B (en) | 2017-07-10 | 2017-07-10 | Device and method for testing mechanical property of rubber assembly at user end of shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107238503A CN107238503A (en) | 2017-10-10 |
| CN107238503B true CN107238503B (en) | 2023-04-07 |
Family
ID=59990343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710555626.2A Active CN107238503B (en) | 2017-07-10 | 2017-07-10 | Device and method for testing mechanical property of rubber assembly at user end of shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107238503B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081014A (en) * | 2010-12-03 | 2011-06-01 | 北京华谷减振器设备有限公司 | Comprehensive performance test bed of automobile shock absorber |
| JP2014172594A (en) * | 2013-03-13 | 2014-09-22 | Kayaba Ind Co Ltd | Damper speed detection device |
| CN104089769A (en) * | 2014-07-26 | 2014-10-08 | 吉林大学 | Reciprocating type liquid shock absorber simulation test device |
| CN105865811A (en) * | 2016-04-14 | 2016-08-17 | 辽宁工业大学 | Automotive suspension vibration damper energy characteristic testing system and automotive suspension vibration damper energy characteristic metering method |
| CN106404383A (en) * | 2016-11-28 | 2017-02-15 | 天津英创汇智汽车技术有限公司 | Magneto-rheological damper performance testing device |
| CN207066753U (en) * | 2017-07-10 | 2018-03-02 | 辽宁理工学院 | Shock absorber user terminal rubber assembly Mechanics Performance Testing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8065055B2 (en) * | 2007-11-21 | 2011-11-22 | Mando Corporation | Shock absorber for controlling damping force characteristics |
-
2017
- 2017-07-10 CN CN201710555626.2A patent/CN107238503B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081014A (en) * | 2010-12-03 | 2011-06-01 | 北京华谷减振器设备有限公司 | Comprehensive performance test bed of automobile shock absorber |
| JP2014172594A (en) * | 2013-03-13 | 2014-09-22 | Kayaba Ind Co Ltd | Damper speed detection device |
| CN104089769A (en) * | 2014-07-26 | 2014-10-08 | 吉林大学 | Reciprocating type liquid shock absorber simulation test device |
| CN105865811A (en) * | 2016-04-14 | 2016-08-17 | 辽宁工业大学 | Automotive suspension vibration damper energy characteristic testing system and automotive suspension vibration damper energy characteristic metering method |
| CN106404383A (en) * | 2016-11-28 | 2017-02-15 | 天津英创汇智汽车技术有限公司 | Magneto-rheological damper performance testing device |
| CN207066753U (en) * | 2017-07-10 | 2018-03-02 | 辽宁理工学院 | Shock absorber user terminal rubber assembly Mechanics Performance Testing device |
Non-Patent Citations (4)
| Title |
|---|
| 孔令洋等.减振器橡胶衬套疲劳试验系统开发.《中国农机化学报》.2015,第36卷(第6期),全文. * |
| 孙晓帮等.减振器橡胶衬套疲劳试验台结构设计.《机床与液压》.2016,第44卷(第7期),全文. * |
| 徐瀚辉.双筒式液压减振器可靠性分析与试验.《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》.2015,(第06期),全文. * |
| 陈双等.汽车悬架减振器总成结构改进及试验分析.《机械设计与制造》.2017,(第5期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107238503A (en) | 2017-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100516813C (en) | Multifunction shockabsorber for automobile and quarter cantilever operation-condition-simulating testing table | |
| CN108361319B (en) | Rubber shock absorber control system | |
| CN103061425A (en) | Series-parallel multistage valve vicious damping method and damper | |
| CN110410445A (en) | A kind of measurable half active oil-pressure damper of adaptive damping of damping velocity of displacement | |
| CN103630377B (en) | A kind of rear shock absorber of motorcycle Static load characteristics test unit | |
| CN207066753U (en) | Shock absorber user terminal rubber assembly Mechanics Performance Testing device | |
| CN107238503B (en) | Device and method for testing mechanical property of rubber assembly at user end of shock absorber | |
| CN105067286A (en) | Testing device for performance of vehicle damper | |
| CN202661279U (en) | Static test device of hydraulic damper | |
| CN1987391B (en) | Negative valence jump dynamic torsion corrector | |
| RU194004U1 (en) | Two-pipe hydropneumatic shock absorber | |
| Sonnenburg et al. | Damper modules with adapted stiffness ratio | |
| CN112413030A (en) | Shock absorber damping control and performance evaluation method, shock absorber optimized by using same and vehicle adopting shock absorber | |
| Shixing et al. | Experimental research on aircraft landing gear drop test based on MRF damper | |
| Shu et al. | Micro-process model of hydraulic shock absorber with abnormal structural noise | |
| Kruse et al. | Analysis of dynamic behavior of twin-tube vehicle shock absorbers | |
| Ding et al. | Fluid flow modeling of a four-stage damping adjustable shock absorber and its experimental research | |
| CN109838495A (en) | Shock absorber of automobile suspension assembly | |
| Jagushte et al. | Design and Fabrication of hydraulic Spring stiffness testing machine | |
| CN109655289A (en) | A kind of air hanging device for car performance endurance test mechanism | |
| CN215492476U (en) | Real-time road spectrum load testing device for buffer block of shock absorber | |
| CN103498885A (en) | Method for designing area of hydraulic shock absorber rebuilt valve normal through hole based on speed characteristics | |
| Abdelwahed et al. | Experimental Investigation on the Dynamics of a Hydraulic Dual Tube Automobile Strut Damper | |
| CN111122181B (en) | Oil-gas non-separated anti-side-tipping interconnected oil-gas suspension system | |
| CN219866031U (en) | Novel damping-adjustable shock absorber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |