CN210664960U - Air spring static vertical rigidity testing device - Google Patents
Air spring static vertical rigidity testing device Download PDFInfo
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- CN210664960U CN210664960U CN201921966417.8U CN201921966417U CN210664960U CN 210664960 U CN210664960 U CN 210664960U CN 201921966417 U CN201921966417 U CN 201921966417U CN 210664960 U CN210664960 U CN 210664960U
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Abstract
The utility model provides an air spring static state vertical rigidity testing device, which comprises a gantry support, wherein a reciprocating piston cylinder is arranged at the middle part of the top of the gantry support in an inverted and fixed mode, a piston rod of the reciprocating piston cylinder penetrates through a top plate of the gantry support, and a cylinder pressure head is arranged at the tail end of the piston rod; a weighing type pressure sensor is arranged right below the cylinder pressure head, the weighing type pressure sensor is arranged at the top of the pressure sensor support, and the output load of the reciprocating piston cylinder is transmitted to the air spring to be tested through the pressure sensor support; during testing, the air spring is arranged at the top of the spring supporting structure; and a deformation measuring device for measuring the compression deformation of the air spring is arranged on the side wall of the pressure sensor support in a matched manner. The testing device can be used for testing various parameters of the static vertical stiffness characteristic of the air spring.
Description
Technical Field
The utility model relates to an air spring characteristic test field specifically relates to a static perpendicular rigidity testing arrangement of air spring.
Background
The air spring is an important component in the air suspension, has small rigidity, low vibration frequency, ideal nonlinear elastic characteristic, light weight and long service life, and has important significance for improving the smoothness of a vehicle, reducing the self weight of the vehicle and damaging a road. At present, the replacement of the traditional plate spring by the air spring has become the development direction of the commercial vehicle suspension system.
The ideal nonlinear elastic characteristic of the air spring is the maximum advantage of the air spring as a suspension elastic element, and the elastic characteristic of the air spring needs to be accurately described through a modeling method, on the premise that basic data such as height, load and the like are more accurately obtained, and then an air spring characteristic curve which is closer to the reality is obtained.
Therefore, a reasonable test method and a test bench are very important for researching the elastic property of the air spring.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a static perpendicular rigidity testing arrangement of air spring can be used for testing each item parameter of the static perpendicular rigidity characteristic of air spring through this testing arrangement.
In order to realize the technical characteristics, the purpose of the utility model is realized as follows: the air spring static vertical stiffness testing device comprises a gantry support, wherein a reciprocating piston cylinder is fixedly installed in the middle of the top of the gantry support in an inverted mode, a piston rod of the reciprocating piston cylinder penetrates through a top plate of the gantry support, and a cylinder pressure head is installed at the tail end of the piston rod; a weighing type pressure sensor is arranged right below the cylinder pressure head, the weighing type pressure sensor is arranged at the top of the pressure sensor support, and the output load of the reciprocating piston cylinder is transmitted to the air spring to be tested through the pressure sensor support; during testing, the air spring is arranged at the top of the spring supporting structure; and a deformation measuring device for measuring the compression deformation of the air spring is arranged on the side wall of the pressure sensor support in a matched manner.
The cylinder pressure head is fixed at the tail end of a piston rod of the reciprocating piston cylinder through threaded connection; the lower end face of the air cylinder pressure head is in contact with and applies pressure to a bearing tray at the top of the weighing type pressure sensor during testing; the pressure-bearing tray is installed in a central threaded hole of the weighing type pressure sensor through threaded connection.
The weighing type pressure sensor is characterized in that threaded through holes are uniformly distributed in the weighing type pressure sensor, bolts penetrate through the threaded through holes, and the weighing type pressure sensor is fixedly connected with the pressure sensor support.
The pressure sensor support is characterized in that an air spring matching mounting hole matched with an air spring is formed in the base of the pressure sensor support, a pressure sensor matching mounting hole matched with a weighing type pressure sensor is formed in the top of the pressure sensor support, and a linkage rod mounting hole is formed in the side wall of the base of the pressure sensor support.
The spring support structure comprises an air spring support, the air spring support is fixed in the middle of the base plate, and the gantry support is integrally and fixedly arranged on the top of the base plate; the height presetting guide rails are symmetrically arranged on two sides of the air spring support, the height presetting guide rails are adjustably provided with limiting sliding blocks, and the bottom end faces of the limiting sliding blocks are matched with the base of the pressure sensor support and limit the pressure sensor support.
The base of the air spring support is fixedly connected with the base plate through a bolt, a threaded mounting hole is machined in the center of the top of the air spring support, and the threaded mounting hole is connected with an air spring in a threaded fit mode and is fixed to the air spring; the central axis of the threaded mounting hole is superposed with the central axis of a piston rod of the reciprocating piston cylinder, so that the load bearing force of the air spring is always on the vertical central axis of symmetry.
The height preset guide rail is provided with height scales; the air spring limiting device is characterized in that two sides of a rectangular frame of the limiting sliding block are symmetrically processed with fastening screw mounting holes, fastening screws are mounted on the fastening screw mounting holes in a matched mode and matched with side walls of the height preset guide rail, so that the height of the limiting sliding block is adjusted to be fixed at any scale position on the height preset guide rail, and the fixed limiting sliding block sets the air spring at the recommended mounting height through the position of the limiting pressure sensor support base.
The deformation measuring device comprises a height sensor position track arranged on the inner side wall of one upright post of the gantry support, a pull rope type height sensor is arranged on the height sensor position track in a sliding fit mode, a movable head of the pull rope type height sensor is fixedly connected with the pressure sensor support through a linkage rod, and the deformation of the air spring is measured in real time.
The pull rope type height sensor can slide up and down in a height sensor position track and is locked at any position so as to adapt to different air spring initial heights.
The utility model discloses there is following beneficial effect:
the utility model discloses a static perpendicular rigidity testing arrangement of air spring, its reasonable in design, simple structure easily makes, dismouting and transport. Through structural design, the output load of the air cylinder can be uniformly applied in the vertical direction, and the arrangement of the weighing type pressure sensor can accurately measure the output load value of the air cylinder. The pull rope type height sensor not only can adapt to air springs with different heights, but also can accurately measure the height variation of the air springs. The limiting sliding block can effectively limit the air spring under the recommended installation height so as to prepare for initial pressure regulation. Simultaneously the utility model discloses an experimental apparatus easy and simple to handle, safe and reliable, the equal all output directly perceived of measured object physics.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 shows the schematic diagram of the air spring static vertical stiffness testing device of the present invention.
Fig. 2 shows a schematic view of the pressure sensor holder according to the present invention.
Fig. 3 shows a schematic diagram of the limiting slider of the present invention.
In the figure: 1 reciprocating piston cylinder; 2, gantry support; 3, a cylinder pressure head; 4, a pressure-bearing tray; 5 a pull-cord type height sensor; 6, a linkage rod; 7 height sensor position track; 8, a base plate; 9 an air spring bracket; 10 air springs; 11, presetting a guide rail at a height; 12, limiting a sliding block; 121 set screws; 13 a pressure sensor support; 131 linkage rod mounting holes; 132 air spring fitting mounting holes; 133 pressure sensor fitting mounting holes; 14 weighing type pressure sensor.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
Example 1:
referring to fig. 1-3, the air spring static vertical stiffness testing device comprises a gantry support 2, wherein a reciprocating piston cylinder 1 is fixedly installed in the middle of the top of the gantry support 2 in an inverted manner, a piston rod of the reciprocating piston cylinder 1 penetrates through a top plate of the gantry support 2, and a cylinder pressure head 3 is installed at the tail end of the piston rod; a weighing type pressure sensor 14 is arranged right below the cylinder pressure head 3, the weighing type pressure sensor 14 is arranged at the top of a pressure sensor support 13, and the output load of the reciprocating piston cylinder 1 is transmitted to the air spring 10 to be tested through the pressure sensor support 13; during testing, the air spring 10 is arranged on top of the spring support structure; and a deformation measuring device for measuring the compression deformation of the air spring 10 is arranged on the side wall of the pressure sensor bracket 13 in a matching way. The testing device with the structure can be used for testing the static vertical stiffness of the air spring 10, can test the rule that the vertical displacement of the air spring changes along with the load under different recommended heights and internal pressures aiming at a certain type of air spring, and further obtains the elastic characteristic curve of the air spring by data processing. In the using process, the reciprocating piston cylinder 1 applies different load pressures to the cylinder pressure head 3, the air spring 10 at the bottom of the cylinder pressure head 3 is pressed by the pressure sensor support 13, corresponding load data is read by the weighing type pressure sensor 14 in the pressing process, corresponding deformation is read by the deformation measuring device, the rule that the vertical displacement changes along with the load is further obtained, and finally, the elastic characteristic curve is obtained through analysis.
Further, the cylinder pressure head 3 is fixed at the tail end of a piston rod of the reciprocating piston cylinder 1 through threaded connection; during testing, the lower end face of the cylinder pressure head 3 is in contact with and applies pressure to the pressure-bearing tray 4 at the top of the weighing type pressure sensor 14; the pressure-bearing tray 4 is installed in a central threaded hole of the weighing type pressure sensor 14 through threaded connection. The output load can be uniformly applied to the weighing type pressure sensor by horizontally contacting the cylinder pressure head 3 with the pressure bearing surface of the pressure bearing tray. And a variable load can be output by adjusting the intake pressure through the reciprocating piston cylinder.
Further, threaded through holes are uniformly distributed on the weighing type pressure sensor 14, bolts penetrate through the threaded through holes, and the weighing type pressure sensor 14 is fixedly connected with the pressure sensor support 13. The fixing reliability of the weighing pressure sensor 14 is ensured by the fixing method, and the load applied to the air spring 10 can be accurately measured.
Further, an air spring matching mounting hole 132 used for matching with an air spring is processed on the base of the pressure sensor support 13, a pressure sensor matching mounting hole 133 used for matching with the weighing type pressure sensor 14 is processed on the top of the pressure sensor support 13, and a linkage rod mounting hole 131 is arranged on the side wall of the base of the pressure sensor support 13.
Further, the spring support structure comprises an air spring support 9, the air spring support 9 is fixed in the middle of the base plate 8, and the gantry support 2 is integrally and fixedly installed on the top of the base plate 8; height preset guide rails 11 are symmetrically arranged on two sides of the air spring support 9, a limiting slide block 12 is adjustably mounted on the height preset guide rails 11, and the bottom end face of the limiting slide block 12 is matched with a base of a pressure sensor support 13 and is limited.
Further, the base of the air spring support 9 is fixedly connected with the base plate 8 through bolts, a threaded mounting hole is machined in the center of the top of the air spring support 9, and the threaded mounting hole is connected with the air spring 10 in a threaded fit mode and is fixed to the air spring 10; the central axis of the threaded mounting hole is superposed with the central axis of a piston rod of the reciprocating piston cylinder 1, so that the load bearing force of the air spring is always on the vertical symmetrical central axis of the air spring. Thereby ensuring the accuracy of measurement.
Further, height scales are arranged on the height preset guide rail 11; set screw mounting holes are symmetrically processed in two sides of a rectangular frame of the limiting sliding block 12, set screws 121 are mounted on the set screw mounting holes in a matched mode, the set screws 121 are matched with the side wall of the height preset guide rail 11, so that the height of the limiting sliding block 12 is adjusted, the limiting sliding block is fixed at any scale position on the height preset guide rail 11, and the air spring is arranged at the recommended mounting height through the position of the limiting pressure sensor support base of the limiting sliding block 12 after fixing. The height preset guide rail 11 can be used for simulating the performance test of air springs with different air pressures, so that the adaptability of the air springs is enhanced.
Further, the deformation measuring device comprises a height sensor position rail 7 arranged on the inner side wall of one upright post of the gantry support 2, a pull rope type height sensor 5 is arranged on the height sensor position rail 7 in a sliding fit mode, and a movable head of the pull rope type height sensor 5 is fixedly connected with a pressure sensor support 13 through a linkage rod 6 so as to measure the deformation of the air spring 10 in real time. The deformation measuring device can be used for measuring the deformation of the air spring in the working process. In the test process, the linkage rod 6 is driven by the pressure sensor support 13, and then the linkage rod 6 drives the movable head of the pull rope type height sensor 5 locked at a certain initial position on the height sensor position track 7 to move and slide on the height sensor position track 7, so that the displacement measurement is realized. After the height sensor body is locked at a certain initial position on the position track, the displacement is measured by the movement distance of the movable head of the height sensor.
Further, the pull-cord type height sensor 5 can slide up and down in the height sensor position rail 7 and be locked at any position so as to adapt to different initial heights of the air spring. And can be used for the performance test of different types of air springs 10.
Example 2:
the method for testing the static vertical stiffness testing device of the air spring comprises the following steps:
step 1: the limiting slide block 12 is fixed at the set height of the height preset guide rail 11 by using a set screw 121, and the recommended installation height of the air spring 10 is met when the pressure is regulated;
step 2: after the height adjustment is completed, and at this height, the air spring 10 is charged with a certain air pressure;
step 3: the limiting slide block 12 is adjusted and installed at the highest position of the height preset guide rail 11 again, and the air spring 10 is in a free height state;
step 4: adjusting the position of the pull rope type height sensor 5 in the height sensor position track 7 to adapt to recommended installation height and free height of various air springs;
step 5: different vertical loads are applied to the air spring 10 in a simulated mode by changing the air inlet pressure of the reciprocating piston cylinder 1, the numerical values of the stay rope type height sensor 5 and the weighing type pressure sensor 14 are read and recorded in the loading process, and the vertical rigidity characteristic of the current air spring under the internal pressure can be calculated;
step 6: and changing the internal pressure of the air spring at the recommended height, and repeating Step 1-Step 5 to obtain the vertical stiffness characteristics of the air spring at different internal pressures.
The utility model discloses a theory of operation does:
a static vertical stiffness testing device of an air spring comprises a pressure sensor support 13, wherein the pressure sensor support comprises a linkage rod mounting hole 131 for mounting a linkage rod, the other end of the linkage rod is embedded into a movable head of a pull rope type height sensor, when the movable head is driven to move, the height variation can be measured through the pull rope type height sensor, and the pull rope type height sensor is mounted in a height sensor position track on a gantry support and can be adjusted up and down and locked to adapt to different air spring heights; the air spring matching mounting hole 132 is used for mounting with the top of an air spring and is suitable for an air inflation joint at the top of the air spring; the weighing type pressure sensor is matched with a circumferential bolt hole in the mounting hole 133 to be used for fixing the weighing type pressure sensor, and the central through hole is used for being matched with a central pressure head of the weighing type pressure sensor; the central pressure head of the weighing type pressure sensor is provided with a threaded through hole and is connected with a pressure-bearing tray through threads. The output shaft end of a reciprocating piston cylinder arranged at the top end of the gantry support is connected with a cylinder pressure head through threads, when the cylinder is loaded, the cylinder pressure head is in butt joint with the pressure-bearing tray to apply load to the weighing type pressure sensor and the air spring, meanwhile, the weighing type pressure sensor can measure the output load of the cylinder, and the measured data is corrected to obtain the bearing load of the air spring after considering the dead weight of the weighing type pressure sensor, the pressure-bearing tray and the pressure sensor support; the air springs are arranged on the air spring support on the base plate, the height preset guide rails are symmetrically arranged on two sides of the air spring support, the limiting sliding blocks on the guide rails are used for setting the installation height of the air springs, and only the set screws at two ends of each sliding block need to be adjusted; the gantry support is arranged on the base plate.
Claims (9)
1. Air spring static state vertical rigidity testing arrangement which characterized in that: the device comprises a gantry support (2), wherein a reciprocating piston cylinder (1) is inversely and fixedly installed in the middle of the top of the gantry support (2), a piston rod of the reciprocating piston cylinder (1) penetrates through a top plate of the gantry support (2), and a cylinder pressure head (3) is installed at the tail end of the piston rod; a weighing type pressure sensor (14) is arranged right below the cylinder pressure head (3), the weighing type pressure sensor (14) is arranged at the top of a pressure sensor support (13), and the output load of the reciprocating piston cylinder (1) is transmitted to the air spring (10) to be tested through the pressure sensor support (13); during testing, the air spring (10) is arranged on the top of the spring supporting structure; and a deformation measuring device for measuring the compression deformation of the air spring (10) is arranged on the side wall of the pressure sensor bracket (13) in a matched manner.
2. The air spring static vertical stiffness testing device of claim 1, wherein: the cylinder pressure head (3) is fixed at the tail end of a piston rod of the reciprocating piston cylinder (1) through threaded connection; during testing, the lower end face of the air cylinder pressure head (3) is in contact with and applies pressure to the pressure-bearing tray (4) at the top of the weighing type pressure sensor (14); the pressure-bearing tray (4) is installed in a central threaded hole of the weighing type pressure sensor (14) through threaded connection.
3. The air spring static vertical stiffness test device according to claim 1 or 2, wherein: the weighing type pressure sensor (14) is provided with uniformly distributed threaded through holes, bolts penetrate through the threaded through holes, and the weighing type pressure sensor (14) is fixedly connected with the pressure sensor support (13).
4. The air spring static vertical stiffness test device according to claim 1 or 2, wherein: an air spring matching mounting hole (132) used for being matched with an air spring is machined in the base of the pressure sensor support (13), a pressure sensor matching mounting hole (133) used for being matched with the weighing type pressure sensor (14) is machined in the top of the pressure sensor support (13), and a linkage rod mounting hole (131) is formed in the side wall of the base of the pressure sensor support (13).
5. The air spring static vertical stiffness testing device of claim 1, wherein: the spring supporting structure comprises an air spring support (9), the air spring support (9) is fixed in the middle of the base plate (8), and the gantry support (2) is integrally and fixedly installed on the top of the base plate (8); height preset guide rails (11) are symmetrically arranged on two sides of the air spring support (9), a limiting sliding block (12) is adjustably mounted on the height preset guide rails (11), and the bottom end face of the limiting sliding block (12) is matched with a base of the pressure sensor support (13) and is limited.
6. The air spring static vertical stiffness testing device of claim 5, wherein: the base of the air spring support (9) is fixedly connected with the base plate (8) through a bolt, a threaded mounting hole is machined in the center of the top of the air spring support (9), and the threaded mounting hole is connected with the air spring (10) in a threaded fit mode and is fixed to the air spring (10); the central axis of the threaded mounting hole is superposed with the central axis of a piston rod of the reciprocating piston cylinder (1), so that the load bearing force of the air spring is always on the vertical symmetrical central axis.
7. The air spring static vertical stiffness testing device of claim 5, wherein: the height preset guide rail (11) is provided with height scales; the rectangle frame bilateral symmetry processing of stop block (12) has holding screw mounting hole, holding screw (121) are installed in the cooperation on the holding screw mounting hole, holding screw (121) cooperate with the lateral wall of highly preset guide rail (11) to highly adjust stop block's (12) height, make it be fixed in highly preset arbitrary scale position on guide rail (11), stop block (12) after the fixing set up air spring at recommended mounting height through the position of restriction pressure sensor support base.
8. The air spring static vertical stiffness testing device of claim 1, wherein: the deformation measuring device comprises a height sensor position track (7) arranged on the inner side wall of one upright post of the gantry support (2), a pull rope type height sensor (5) is arranged on the height sensor position track (7) in a sliding fit mode, the movable head of the pull rope type height sensor (5) is fixedly connected with the pressure sensor support (13) through a linkage rod (6), and the deformation of the air spring (10) is measured in real time.
9. The air spring static vertical stiffness test device of claim 8, wherein: the pull rope type height sensor (5) can slide up and down in the height sensor position track (7) and is locked at any position so as to adapt to different initial heights of the air springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921966417.8U CN210664960U (en) | 2019-11-14 | 2019-11-14 | Air spring static vertical rigidity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921966417.8U CN210664960U (en) | 2019-11-14 | 2019-11-14 | Air spring static vertical rigidity testing device |
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| Publication Number | Publication Date |
|---|---|
| CN210664960U true CN210664960U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921966417.8U Expired - Fee Related CN210664960U (en) | 2019-11-14 | 2019-11-14 | Air spring static vertical rigidity testing device |
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| CN (1) | CN210664960U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793738A (en) * | 2019-11-14 | 2020-02-14 | 湖北汽车工业学院 | Air spring static vertical stiffness testing device and method |
| CN113063610A (en) * | 2021-05-12 | 2021-07-02 | 中国第一汽车股份有限公司 | Control method of air suspension |
-
2019
- 2019-11-14 CN CN201921966417.8U patent/CN210664960U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793738A (en) * | 2019-11-14 | 2020-02-14 | 湖北汽车工业学院 | Air spring static vertical stiffness testing device and method |
| CN110793738B (en) * | 2019-11-14 | 2024-06-18 | 湖北汽车工业学院 | Device and method for testing static vertical stiffness of air spring |
| CN113063610A (en) * | 2021-05-12 | 2021-07-02 | 中国第一汽车股份有限公司 | Control method of air suspension |
| CN113063610B (en) * | 2021-05-12 | 2022-10-28 | 中国第一汽车股份有限公司 | Control method of air suspension |
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Granted publication date: 20200602 Termination date: 20211114 |