CN211904616U - Automobile suspension spring fatigue testing machine - Google Patents
Automobile suspension spring fatigue testing machine Download PDFInfo
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- CN211904616U CN211904616U CN202020278713.5U CN202020278713U CN211904616U CN 211904616 U CN211904616 U CN 211904616U CN 202020278713 U CN202020278713 U CN 202020278713U CN 211904616 U CN211904616 U CN 211904616U
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Abstract
The utility model provides an automobile suspension spring fatigue testing machine, which comprises a frame, a cross swing arm device, a turbine worm eccentric adjusting mechanism, an upper spring seat guiding mechanism and a lower spring seat height adjusting mechanism; the cross swing arm device comprises a swing arm mechanism and a transmission rod; the turbine worm eccentric adjusting mechanism comprises a rotating disc and a first motor, the upper end of the cross-shaped swing arm device is installed on the rack through a swing arm mechanism, and the lower end of the cross-shaped swing arm device is installed on the rotating disc through a transmission rod; the swing arm mechanism extends four swing arms along the circumferential direction, the top and the bottom of the upper spring seat guide mechanism are respectively connected with the swing arms and the lower spring seat height adjusting mechanism, and the first motor can drive the rotating disc to rotate and drive the four swing arms to rotate and do up-and-down fluctuating movement so as to realize the fatigue test of the spring; the utility model discloses in be provided with force cell sensor and alarm and can adjust the fatigue test stroke, realize that the spring fracture became invalid and report to the police, improved efficiency of software testing and quality.
Description
Technical Field
The utility model relates to a check out test set technical field specifically, relates to an automotive suspension spring fatigue testing machine.
Background
The automobile suspension spring is an elastic element in an automobile suspension, so that elastic connection is made between an axle and a frame or an automobile body, vertical load is borne and transmitted, and impact caused by uneven road surfaces is relieved and restrained.
Patent document CN106197974A discloses an air spring fatigue testing machine simulating real vehicle working state, including installation device, drive arrangement, the link gear and state detection system connected between drive arrangement and installation device can drive the air spring to do the motion, drive arrangement includes driving motor, speed reduction transmission structure, and the link gear includes crank link mechanism and flywheel, crank link mechanism's input and drive arrangement's output are connected, crank link mechanism's output drives the air spring motion, the flywheel is arranged in between crank dish and the speed reduction transmission structure, but this design still can not make the spring test under certain stroke, has restricted automobile suspension spring fatigue test accuracy greatly, and the structure is unreasonable.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing an automobile suspension spring fatigue testing machine.
According to the utility model, the fatigue testing machine for the automobile suspension spring comprises a frame 1, a cross swing arm device 2, a turbine worm eccentric adjusting mechanism 3, four upper spring seat guiding mechanisms 4 and four lower spring seat height adjusting mechanisms 5;
the cross swing arm device 2 comprises a swing arm mechanism 15 at the top and a transmission rod 16 at the bottom;
the eccentric adjusting mechanism 3 of the worm gear and worm comprises a rotating disc horizontally placed at the top and a first motor at the bottom, the first motor is in driving connection with the rotating disc, the upper end of the cross swing arm device 2 is movably mounted on the rack 1 through a swing arm mechanism 15, the lower end of the cross swing arm device 2 is mounted on the rotating disc through a transmission rod 16, and the position of the transmission rod 16 mounted on the rotating disc can be adjusted according to the test requirement;
four swing arms 8 extend out of the swing arm mechanism 15 along the circumferential direction, the top of the upper spring seat guide mechanism 4 is movably connected with the swing arms 8, the bottom of the upper spring seat guide mechanism 4 is installed on the lower spring seat height adjusting mechanism 5, and a suspension spring to be tested is installed between the upper spring seat guide mechanism 4 and the lower spring seat height adjusting mechanism 5;
when the first motor drives the rotating disc to rotate, the transmission rod 16 rotates along with the rotating disc and drives the four swing arms 8 on the swing arm mechanism 15 to move up and down, so that the suspension spring to be tested is driven to move in an extending and shortening manner.
Preferably, the lower spring seat height adjusting mechanism 5 comprises a guide rail 10, a lower spring seat 11, a jack 13 and a second motor 14;
the lower spring seat 11 is mounted on a lifting machine 13, the lifting machine 13 is in sliding fit with the guide rail 10, and when the second motor 14 rotates, the lifting machine 13 is driven to drive the lower spring seat 11 to ascend or descend along the length direction of the guide rail 10.
Preferably, the lower spring seat height adjusting mechanism 5 further comprises a load cell 12;
the load cell 12 is installed between the lower spring seat 11 and the jack 13.
Preferably, a display is also included, which is electrically connected to the load cell 12.
Preferably, the alarm device further comprises a protective cover 6 and an alarm, wherein the protective cover 6 is arranged outside the four lower spring seat height adjusting mechanisms 5;
a protective door is arranged on the protective cover 6, and a door lock switch is arranged on the protective door;
the door lock switch is electrically connected with the alarm and the first motor respectively;
when the protective door is opened, the alarm gives an audible and visual alarm and the first motor stops rotating.
Preferably, the motor further comprises a control device, and the control device is electrically connected with the first motor and the second motor respectively.
Preferably, the frame 1 comprises a top support frame and a plurality of support legs 17 extending downwards from the top support frame;
the support legs 17 are respectively screwed or welded with the top support frame.
Preferably, the upper spring seat guide mechanism 4 comprises a moving compression rod and a guide cylinder;
the upper end of the movement pressure rod is movably connected with the swing arm, the lower end of the movement pressure rod extends into the guide cylinder from the top of the guide cylinder and is movably matched with the guide cylinder, the bottom of the guide cylinder is installed on the lower spring seat 11, and the suspension spring to be tested is installed in the guide cylinder.
Preferably, the outer diameter of the suspension spring to be tested is 80-250 mm, the length of the suspension spring to be tested is 100-500 mm, and the compression spring stroke of the suspension spring to be tested is 0-240 mm.
According to the utility model, the fatigue testing machine for the automobile suspension spring comprises a frame 1, a cross swing arm device 2, a turbine worm eccentric adjusting mechanism 3, four upper spring seat guiding mechanisms 4 and four lower spring seat height adjusting mechanisms 5;
the cross swing arm device 2 comprises a swing arm mechanism 15 at the top and a transmission rod 16 at the bottom;
the eccentric adjusting mechanism 3 of the worm gear and worm comprises a rotating disc horizontally placed at the top and a first motor at the bottom, the first motor is in driving connection with the rotating disc, the upper end of the cross swing arm device 2 is movably mounted on the rack 1 through a swing arm mechanism 15, the lower end of the cross swing arm device 2 is mounted on the rotating disc through a transmission rod 16, and the position of the transmission rod 16 mounted on the rotating disc can be adjusted according to the test requirement;
four swing arms 8 extend out of the swing arm mechanism 15 along the circumferential direction, the top of the upper spring seat guide mechanism 4 is movably connected with the swing arms 8, the bottom of the upper spring seat guide mechanism 4 is installed on the lower spring seat height adjusting mechanism 5, and a suspension spring to be tested is installed between the upper spring seat guide mechanism 4 and the lower spring seat height adjusting mechanism 5;
when the first motor drives the rotating disc to rotate, the transmission rod 16 rotates along with the rotating disc and drives the four swing arms 8 on the swing arm mechanism 15 to move up and down, so that the suspension spring to be tested is driven to move in an extending and shortening manner;
the lower spring seat height adjusting mechanism 5 comprises a guide rail 10, a lower spring seat 11, a jacking machine 13 and a second motor 14;
the lower spring seat 11 is mounted on a jacking machine 13, the jacking machine 13 is in sliding fit with the guide rail 10, and when the second motor 14 rotates, the jacking machine 13 is driven to drive the lower spring seat 11 to ascend or descend along the length direction of the guide rail 10;
the lower spring seat height adjusting mechanism 5 further comprises a force measuring sensor 12;
the load cell 12 is arranged between the lower spring seat 11 and the jacking machine 13;
the device also comprises a display which is electrically connected with the load cell 12;
the alarm device is characterized by further comprising a protective cover 6 and an alarm, wherein the protective cover 6 is installed outside the four lower spring seat height adjusting mechanisms 5;
a protective door is arranged on the protective cover 6, and a door lock switch is arranged on the protective door;
the door lock switch is electrically connected with the alarm and the first motor respectively;
when the protective door is opened, the alarm gives an audible and visual alarm and the first motor stops rotating;
the control device is electrically connected with the first motor and the second motor respectively;
the frame 1 comprises a top support frame and a plurality of support legs 17 extending downwards from the top support frame;
the plurality of supporting legs 17 are respectively in threaded connection or welded with the top supporting frame;
the upper spring seat guide mechanism 4 comprises a movement compression bar and a guide cylinder;
the upper end of the motion compression bar is movably connected with the swing arm, the lower end of the motion compression bar extends into the guide cylinder from the top of the guide cylinder and is movably matched with the guide cylinder, the bottom of the guide cylinder is installed on the lower spring seat 11, and the suspension spring to be tested is installed in the guide cylinder;
the outer diameter of the suspension spring to be tested is 80-250 mm, the length of the suspension spring to be tested is 100-500 mm, and the compression spring stroke of the suspension spring to be tested is 0-240 mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses can set for the suspension spring fatigue test stroke that awaits measuring through spring holder height adjustment mechanism 5, adjustment transfer line 16 mounted position on the rolling disc under the adjustment, simulate real car and travel, reach spring fracture and attenuation value through force cell 12, and the suspension spring that awaits measuring passes through electronic realization, has improved efficiency of software testing, simple to operate, and the test result is accurate.
2. The safety of operators is guaranteed and tested by the protective cover and the alarm, the structural design is reasonable, and the practicability is high.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the lower spring seat height adjusting mechanism 5.
The figures show that:
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
The utility model provides an automobile suspension spring fatigue testing machine, as shown in figure 1, comprising a frame 1, a cross swing arm device 2, a turbine worm eccentric adjusting mechanism 3, four upper spring seat guiding mechanisms 4 and four lower spring seat height adjusting mechanisms 5; the cross swing arm device 2 comprises a swing arm mechanism 15 at the top and a transmission rod 16 at the bottom; the turbine worm eccentric adjusting mechanism 3 comprises a rotating disc horizontally placed at the top and a first motor at the bottom, the first motor is in driving connection with the rotating disc, the upper end of the cross swing arm device 2 is movably mounted on the rack 1 through a swing arm mechanism 15, the rack 1 plays a role in supporting the cross swing arm device 2, and the lower end of the cross swing arm device 2 is mounted on the rotating disc through a transmission rod 16; four swing arms 8 extend out of the swing arm mechanism 15 along the circumferential direction, the top of the upper spring seat guide mechanism 4 is movably connected with the swing arms 8, the bottom of the upper spring seat guide mechanism 4 is installed on the lower spring seat height adjusting mechanism 5, and a suspension spring to be tested is installed between the upper spring seat guide mechanism 4 and the lower spring seat height adjusting mechanism 5; when the first motor drives the rotating disc to rotate, the transmission rod 16 rotates along with the rotating disc and drives the four swing arms 8 on the swing arm mechanism 15 to move up and down, so that the suspension spring to be tested is driven to move in an extending and shortening manner.
Further, the position of the transmission rod 16 mounted on the rotating disc can be adjusted according to the test requirement, and the distance between the mounting position of the transmission rod 16 on the rotating disc and the center of the rotating disc is adjusted, so that the up-and-down movement distance of the four swing arms 8 can be realized, and then the height of the lower spring seat 11 is adjusted, so that the mounting space and the spring compression stroke of the suspension spring to be tested with different sizes can be realized together, wherein the outer diameter of the suspension spring to be tested which can be tested is 80-250 mm, and the length of the suspension spring to be tested is 100-500 mm, and wherein the pressure spring stroke of the suspension spring to be tested can be 0-240 mm by adjusting the distance between the mounting position of the transmission rod 16 on the rotating disc and the center of the rotating disc.
Specifically, as shown in fig. 1, the electric vehicle further includes a control device, the control device is electrically connected to the first motor and the second motor, and the control device can control the start and stop of the first motor and the second motor.
Specifically, as shown in fig. 1, the lower spring seat height adjusting mechanism 5 includes a guide rail 10, a lower spring seat 11, a jack 13, and a second motor 14; the lower spring seat 11 is installed on the jacking machine 13, the jacking machine 13 is in sliding fit with the guide rail 10, when the second motor 14 rotates, the jacking machine 13 is driven to drive the lower spring seat 11 to ascend or descend along the length direction of the guide rail 10, the guide rail 10 is arranged to ensure that the jacking machine 13 can vertically move up and down, and the accuracy of the installation position of the suspension spring to be tested is ensured.
Further, as shown in fig. 1, the lower spring seat height adjusting mechanism 5 further includes a load cell 12 and a display; the force measuring sensor 12 is installed between the lower spring seat 11 and the jacking machine 13, the display is electrically connected with the force measuring sensor 12, and numerical values detected by the force measuring sensor 12 can be visually displayed and recorded through the display, so that test data statistics is facilitated.
Specifically, as shown in fig. 1, the alarm device further comprises a protective cover 6 and an alarm, wherein the protective cover 6 is installed outside the four lower spring seat height adjusting mechanisms 5; a protective door is arranged on the protective cover 6, and a door lock switch is arranged on the protective door; the door lock switch is electrically connected with the alarm and the first motor respectively; when the protective door is opened, the alarm gives an audible and visual alarm and the first motor stops rotating.
Specifically, as shown in fig. 1, the frame 1 includes a top support frame and a plurality of support legs 17 extending downward from the top support frame; the support legs 17 are respectively screwed or welded with the top support frame.
Specifically, as shown in fig. 1, the upper spring seat guide mechanism 4 includes a moving pressing rod and a guide cylinder; the upper end and the swing arm swing joint of motion depression bar, the lower extreme of motion depression bar extends to the inside of guide cylinder and with guide cylinder clearance fit from the top of guide cylinder, the bottom of guide cylinder is installed on spring holder 11 down, the suspension spring that awaits measuring is installed in the guide cylinder, and when carrying out the spring fatigue test, the motion depression bar gets into reciprocating motion repeatedly in the guide cylinder and realizes the simulation compression to the suspension spring that awaits measuring, wherein, still be provided with automatic oiling ware 9 on the guide cylinder, can annotate oil automatically to the guide cylinder, can play the effect of lubricated motion depression bar and guide cylinder contact surface, prolonged the life of equipment.
The working principle of the utility model is as follows:
firstly, controlling a second motor 14 to rotate to drive a jacking machine 13 to drive a lower spring seat 11 to descend along the length direction of a guide rail 10, installing a suspension spring to be tested on the lower spring seat 11, controlling the second motor 14 to rotate reversely to drive the jacking machine 13 to drive the lower spring seat 11 to do ascending motion, moving the lower spring seat 11 to a set position according to the height of the spring, stopping the rotation of the second motor 14, and installing a guide cylinder on the lower spring seat 11; secondly, adjusting the mounting position of the transmission rod 16 on the rotary disc according to the test stroke of the suspension spring to be tested, specifically, adjusting the distance between the mounting position of the transmission rod 16 and the center of the rotary disc to achieve the purpose of adjusting the test stroke of the suspension spring, and closing the protective door after the adjustment is completed; and finally, controlling the first motor to start to drive the rotating disc to rotate and drive the transmission rod 16 to rotate along with the rotating disc and drive the four swing arms 8 on the swing arm mechanism 15 to rotate around the connection points with the rack 1 through the control device, and enabling the four swing arms 8 to rotate and simultaneously move up and down in a fluctuating manner so as to compress the suspension spring to be tested to be extended and shortened, thereby realizing the fatigue test of the spring and obtaining test data through the control device and the display device.
The utility model provides an add force cell among the lower spring holder height adjusting mechanism, force cell 12 promptly has increased the measuring function of spring force value in the experiment, according to the change of spring force value condition, through the cooperation of force cell 12 with the alarm, can realize the spring fracture inefficacy and report to the police, has still been given simultaneously the utility model discloses the function of spring dynamometry has effectively realized the tired detection of spring.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A fatigue testing machine for an automobile suspension spring is characterized by comprising a rack (1), a cross-shaped swing arm device (2), a worm gear eccentric adjusting mechanism (3), four upper spring seat guide mechanisms (4) and four lower spring seat height adjusting mechanisms (5);
the cross swing arm device (2) comprises a swing arm mechanism (15) at the top and a transmission rod (16) at the bottom;
the eccentric adjusting mechanism (3) of the worm gear and worm comprises a rotating disc horizontally placed at the top and a first motor at the bottom, the first motor is in driving connection with the rotating disc, the upper end of the cross swing arm device (2) is movably mounted on the rack (1) through a swing arm mechanism (15), the lower end of the cross swing arm device (2) is mounted on the rotating disc through a transmission rod (16), and the position of the transmission rod (16) mounted on the rotating disc can be adjusted according to the test requirement;
four swing arms (8) extend out of the swing arm mechanism (15) along the circumferential direction, the top of the upper spring seat guide mechanism (4) is movably connected with the swing arms (8), the bottom of the upper spring seat guide mechanism (4) is installed on the lower spring seat height adjusting mechanism (5), and a suspension spring to be tested is installed between the upper spring seat guide mechanism (4) and the lower spring seat height adjusting mechanism (5);
when the first motor drives the rotating disc to rotate, the transmission rod (16) rotates along with the rotating disc and drives the four swing arms (8) on the swing arm mechanism (15) to move up and down, so that the suspension spring to be tested is driven to move in an extending and shortening manner.
2. The fatigue testing machine for the suspension spring of the automobile according to claim 1, wherein the lower spring seat height adjusting mechanism (5) comprises a guide rail (10), a lower spring seat (11), a jack (13) and a second motor (14);
the lower spring seat (11) is installed on the jacking machine (13), the jacking machine (13) is in sliding fit with the guide rail (10), and when the second motor (14) rotates, the jacking machine (13) is driven to drive the lower spring seat (11) to ascend or descend along the length direction of the guide rail (10).
3. The automotive suspension spring fatigue testing machine according to claim 2, wherein the lower spring seat height adjusting mechanism (5) further comprises a load cell (12);
the load cell (12) is arranged between the lower spring seat (11) and the jacking machine (13).
4. The automotive suspension spring fatigue testing machine of claim 3, further comprising a display electrically connected to the load cell (12).
5. The fatigue testing machine for the automobile suspension spring is characterized by further comprising a protective cover (6) and an alarm, wherein the protective cover (6) is arranged outside the four lower spring seat height adjusting mechanisms (5);
a protective door is arranged on the protective cover (6), and a door lock switch is arranged on the protective door;
the door lock switch is electrically connected with the alarm and the first motor respectively;
when the protective door is opened, the alarm gives an audible and visual alarm and the first motor stops rotating.
6. The fatigue testing machine for the suspension spring of the automobile as claimed in claim 1, further comprising a control device electrically connected to the first motor and the second motor, respectively.
7. The automotive suspension spring fatigue testing machine of claim 1, characterized in that the frame (1) comprises a top support frame and a plurality of support legs (17) extending downwards from the top support frame;
the supporting legs (17) are respectively in threaded connection or welded with the top supporting frame.
8. The automotive suspension spring fatigue testing machine according to claim 1, wherein the upper spring seat guide mechanism (4) comprises a moving press rod and a guide cylinder;
the upper end of the movement pressure rod is movably connected with the swing arm, the lower end of the movement pressure rod extends into the guide cylinder from the top of the guide cylinder and is movably matched with the guide cylinder, the bottom of the guide cylinder is installed on a lower spring seat (11), and the suspension spring to be tested is installed in the guide cylinder.
9. The fatigue testing machine for the automotive suspension spring as claimed in claim 1, wherein the suspension spring to be tested has an outer diameter of 80-250 mm and a length of 100-500 mm, and wherein the compression spring stroke of the suspension spring to be tested is 0-240 mm.
10. A fatigue testing machine for an automobile suspension spring is characterized by comprising a rack (1), a cross-shaped swing arm device (2), a worm gear eccentric adjusting mechanism (3), four upper spring seat guide mechanisms (4) and four lower spring seat height adjusting mechanisms (5);
the cross swing arm device (2) comprises a swing arm mechanism (15) at the top and a transmission rod (16) at the bottom;
the eccentric adjusting mechanism (3) of the worm gear and worm comprises a rotating disc horizontally placed at the top and a first motor at the bottom, the first motor is in driving connection with the rotating disc, the upper end of the cross swing arm device (2) is movably mounted on the rack (1) through a swing arm mechanism (15), the lower end of the cross swing arm device (2) is mounted on the rotating disc through a transmission rod (16), and the position of the transmission rod (16) mounted on the rotating disc can be adjusted according to the test requirement;
four swing arms (8) extend out of the swing arm mechanism (15) along the circumferential direction, the top of the upper spring seat guide mechanism (4) is movably connected with the swing arms (8), the bottom of the upper spring seat guide mechanism (4) is installed on the lower spring seat height adjusting mechanism (5), and a suspension spring to be tested is installed between the upper spring seat guide mechanism (4) and the lower spring seat height adjusting mechanism (5);
when the first motor drives the rotating disc to rotate, the transmission rod (16) rotates along with the rotating disc and drives the four swing arms (8) on the swing arm mechanism (15) to move up and down, so that the suspension spring to be tested is driven to move in an extending and shortening manner;
the lower spring seat height adjusting mechanism (5) comprises a guide rail (10), a lower spring seat (11), a jacking machine (13) and a second motor (14);
the lower spring seat (11) is installed on the jacking machine (13), the jacking machine (13) is in sliding fit with the guide rail (10), and when the second motor (14) rotates, the jacking machine (13) is driven to drive the lower spring seat (11) to ascend or descend along the length direction of the guide rail (10);
the lower spring seat height adjusting mechanism (5) further comprises a force measuring sensor (12);
the force measuring sensor (12) is arranged between the lower spring seat (11) and the jacking machine (13);
the device also comprises a display, wherein the display is electrically connected with the load cell (12);
the alarm device is characterized by further comprising a protective cover (6) and an alarm, wherein the protective cover (6) is arranged outside the four lower spring seat height adjusting mechanisms (5);
a protective door is arranged on the protective cover (6), and a door lock switch is arranged on the protective door;
the door lock switch is electrically connected with the alarm and the first motor respectively;
when the protective door is opened, the alarm gives an audible and visual alarm and the first motor stops rotating;
the control device is electrically connected with the first motor and the second motor respectively;
the rack (1) comprises a top support frame and a plurality of support legs (17) extending downwards from the top support frame;
the supporting legs (17) are respectively in threaded connection or welded with the top supporting frame;
the upper spring seat guide mechanism (4) comprises a movement compression bar and a guide cylinder;
the upper end of the motion compression bar is movably connected with the swing arm, the lower end of the motion compression bar extends into the guide cylinder from the top of the guide cylinder and is movably matched with the guide cylinder, the bottom of the guide cylinder is installed on a lower spring seat (11), and the suspension spring to be tested is installed in the guide cylinder;
the outer diameter of the suspension spring to be tested is 80-250 mm, the length of the suspension spring to be tested is 100-500 mm, and the compression spring stroke of the suspension spring to be tested is 0-240 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020278713.5U CN211904616U (en) | 2020-03-09 | 2020-03-09 | Automobile suspension spring fatigue testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020278713.5U CN211904616U (en) | 2020-03-09 | 2020-03-09 | Automobile suspension spring fatigue testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211904616U true CN211904616U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020278713.5U Active CN211904616U (en) | 2020-03-09 | 2020-03-09 | Automobile suspension spring fatigue testing machine |
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|---|---|
| CN (1) | CN211904616U (en) |
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2020
- 2020-03-09 CN CN202020278713.5U patent/CN211904616U/en active Active
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