CN107255568B - Test platform assembly for railway vehicle fatigue and vibration test - Google Patents
Test platform assembly for railway vehicle fatigue and vibration test Download PDFInfo
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- CN107255568B CN107255568B CN201710446265.8A CN201710446265A CN107255568B CN 107255568 B CN107255568 B CN 107255568B CN 201710446265 A CN201710446265 A CN 201710446265A CN 107255568 B CN107255568 B CN 107255568B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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Abstract
The invention provides a test platform assembly for railway vehicle fatigue and vibration tests, which comprises: the supporting platform is fixedly arranged; the testing platform is slidably arranged on the supporting platform, an integrated loading mechanism mounting part is arranged on the top surface of the testing platform, and the bottom surface of the testing platform is attached to the top surface of the supporting platform; the driving device is used for driving the test platform to slide on the supporting platform; and each fastening structure has a fastening state for fixing the test platform and the supporting platform relatively and a loosening state for enabling the test platform to slide relative to the supporting platform. The technical scheme of the invention can effectively solve the problem that the test bed in the prior art cannot meet the requirements of the whole railway vehicle for fatigue and vibration tests.
Description
Technical Field
The invention relates to the technical field of railway vehicle tests, in particular to a test platform assembly for railway vehicle fatigue and vibration tests.
Background
In the prior art, when fatigue and vibration tests are carried out on railway vehicles, the tests are usually carried out on each part of the railway vehicles individually. The weight of each component of the railway vehicle is light relative to the weight of the entire vehicle, and it is generally sufficient to fix each component separately using a small-sized test stand. The small test bed can be movably adjusted through a sliding block structure or a machine tool guide rail mechanism, and the small test bed is fixed in place through a bolt pressing plate. However, if fatigue vibration testing is required for the entire railway vehicle, the size and weight of the test bed of the railway vehicle are large, and the above-described moving adjustment method and fixing method of the small test bed cannot satisfy effective fixing and high-precision adjustment of a large test bed having a self weight of hundreds of tons or more.
Disclosure of Invention
The invention mainly aims to provide a test platform assembly for railway vehicle fatigue and vibration tests, and aims to solve the problem that a test bed in the prior art cannot meet the requirements of the whole railway vehicle on fatigue and vibration tests.
In order to achieve the above object, the present invention provides a test platform assembly for railway vehicle fatigue and vibration tests, comprising: the supporting platform is fixedly arranged; the testing platform is slidably arranged on the supporting platform, an integrated loading mechanism mounting part is arranged on the top surface of the testing platform, and the bottom surface of the testing platform is attached to the top surface of the supporting platform; the driving device is used for driving the test platform to slide on the supporting platform; and each fastening structure has a fastening state for fixing the test platform and the supporting platform relatively and a loosening state for enabling the test platform to slide relative to the supporting platform.
Further, be provided with T type groove on supporting platform's the top surface, fastening structure includes T type bolt and nut, T type bolt and T type groove looks adaptation, is provided with the hole of wearing to establish that link up the setting along its direction of height on the test platform, and T type bolt is worn to establish and is worn to establish downthehole, and the head slidable ground of T type bolt sets up at T type inslot, and the afterbody of T type bolt upwards extends to test platform's top and is connected with the nut.
Furthermore, an avoiding concave part is arranged on the top surface of the test platform, the inside of the avoiding concave part is communicated with the through hole, and the nut is accommodated in the avoiding concave part.
Further, a plurality of T type bolts and a plurality of nut are arranged in a matrix.
Further, drive arrangement includes electric speed reducer and lead screw, and electric speed reducer is fixed to be set up, and the lead screw is connected on test platform, and the lead screw cooperatees with electric speed reducer to turn into linear motion with electric speed reducer's rotary motion, thereby drive test platform slides for supporting platform.
Further, the test platform assembly further comprises an auxiliary supporting device, the auxiliary supporting device comprises an installation main body and an auxiliary supporting portion arranged on the installation main body in a lifting mode, when the test platform slides on the supporting platform, the auxiliary supporting device and the test platform slide synchronously, and the auxiliary supporting portion rises to abut against the test platform.
Furthermore, the auxiliary supporting device also comprises a roller arranged on the mounting main body and a guide rail matched with the roller.
Further, the auxiliary supporting device further comprises a hydraulic cylinder connected between the auxiliary supporting part and the mounting body.
Furthermore, the number of the auxiliary supporting devices is four, and the four auxiliary supporting devices are respectively arranged corresponding to four corners of the test platform.
Further, the side edge of the test platform extending along the sliding direction of the test platform protrudes outwards out of the supporting platform, a guide wheel is arranged on the bottom surface of the part of the test platform protruding out of the supporting platform, and when the test platform slides on the supporting platform, the guide wheel is matched with the supporting platform to guide the test platform.
By applying the technical scheme of the invention, the top surface of the test platform is provided with the integrated loading mechanism mounting part, and the bottom surface of the test platform is attached to the top surface of the supporting platform. The integrated loading mechanism mounting portion can be used for mounting an integrated loading mechanism. When the railway vehicle is tested, the railway vehicle is arranged on the integrated loading mechanism, and the integrated loading mechanism can simulate the actual running state of the railway vehicle, so that favorable conditions are provided for the vibration test of the railway vehicle. The bottom surface of the test platform is attached to the top surface of the supporting platform, so that the weight of the test platform, the integrated loading mechanism on the upper portion of the test platform and the weight of the railway vehicle are conveniently and better transferred to the supporting platform, and the test platform is placed and moved more stably. In addition, the driving device is used for driving the test platform to slide on the supporting platform, so that the test platform can be effectively adjusted. Each fastening structure has a fastening state for fixing the test platform and the supporting platform relatively and a loosening state for enabling the test platform to slide relative to the supporting platform. That is to say, when the test platform needs to be moved, all the fastening structures are in a loosening state, so that the test platform can slide relative to the supporting platform. When the test platform moves in place, the fastening structures are all in a fastening state, so that the test platform is fixed on the supporting platform. In the process, the fastening structure does not need to be taken down, and the operation is more convenient.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic cross-sectional structural view of an embodiment of a test platform assembly for railway vehicle fatigue and vibration testing in accordance with the present invention;
FIG. 2 shows an enlarged schematic view at A of the test platform assembly of FIG. 1;
FIG. 3 shows a cross-sectional structural schematic view of the test platform assembly of FIG. 1 after assembly with an integrated loading mechanism;
FIG. 4 shows a partial schematic structural view of one end of the test platform assembly of FIG. 1;
FIG. 5 shows a partial schematic structural view of the auxiliary support means at the other end of the test platform assembly of FIG. 1;
FIG. 6 shows a schematic structural view of a guide wheel of the test platform assembly of FIG. 1;
FIG. 7 is a schematic structural view of the test platform assembly of FIG. 1 during vibration testing (not shown with specific configurations of the railway vehicle and integrated loading mechanism); and
figure 8 shows a schematic structural view of the test platform assembly of figure 1 when performing a vibration test (showing the specific structure of the railway vehicle and the integrated loading mechanism).
Wherein the figures include the following reference numerals:
10. a support platform; 11. a T-shaped groove; 20. a test platform; 21. avoiding the concave part; 30. an integrated loading mechanism mounting section; 40. a drive device; 41. an electric speed reducer; 42. a screw rod; 50. a fastening structure; 51. a T-bolt; 52. a nut; 60. an auxiliary support device; 61. mounting the main body; 62. an auxiliary support portion; 63. a roller; 64. a guide rail; 65. a hydraulic cylinder; 70. a guide wheel; 80. an integrated loading mechanism; 90. a railway vehicle.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 3, 7 and 8, the test platform assembly for fatigue and vibration test of railway vehicles of the present embodiment includes a support platform 10, a test platform 20, a driving device 40 and a plurality of fastening structures 50. The support platform 10 is fixedly arranged on the ground. The test platform 20 is slidably disposed on the support platform 10. The top surface of the test platform 20 is provided with an integrated loading mechanism mount 30. The bottom surface of the test platform 20 is attached to the top surface of the support platform 10. The driving device 40 is used for driving the test platform 20 to slide on the support platform 10. Each fastening structure 50 has a fastened state in which the test platform 20 and the support platform 10 are fixed relative to each other and a released state in which the test platform 20 is slidable relative to the support platform 10.
With the test platform assembly of this embodiment, the top surface of the test platform 20 is provided with the integrated loading mechanism mounting portion 30, and the bottom surface of the test platform 20 is attached to the top surface of the supporting platform 10. The integrated loading mechanism mounting portion 30 described above can be used to mount the integrated loading mechanism 80. When the railway vehicle 90 is tested, the railway vehicle 90 is arranged on the integrated loading mechanism 80, and the integrated loading mechanism 80 can simulate the actual running state of the railway vehicle 90, so that favorable conditions are provided for the vibration test of the railway vehicle 90. The bottom surface of the test platform 20 is attached to the top surface of the support platform 10, so that the weight of the test platform 20 and the weight of the integrated loading mechanism 80 and the railway vehicle 90 on the upper portion of the test platform are better transmitted to the support platform 10, and the test platform 20 is placed and moved more stably. In addition, the driving device 40 is used for driving the test platform 20 to slide on the support platform 10, so that the test platform 20 can be effectively adjusted. Each fastening structure 50 has a fastened state in which the test platform 20 and the support platform 10 are fixed relative to each other and a released state in which the test platform 20 is slidable relative to the support platform 10. That is, when the test platform 20 needs to be moved, the fastening structures 50 are released, so that the test platform 20 can slide relative to the support platform 10. After the testing platform 20 is moved to the proper position, the fastening structures 50 are all in a fastened state, so that the testing platform 20 is fixed on the supporting platform 10. In the above process, the fastening structure 50 does not need to be removed, and the operation is more convenient.
As shown in fig. 1 to 3, in the test platform assembly of the present embodiment, a T-shaped groove 11 is provided on the top surface of the support platform 10. The fastening structure 50 includes a T-bolt 51 and a nut 52. Wherein the T-bolt 51 is adapted to the T-groove 11. The test platform 20 is provided with a through hole penetrating along the height direction thereof, and the T-shaped bolt 51 is inserted in the through hole. The head of the T-bolt 51 is slidably disposed within the T-slot 11. The tail of the T-bolt 51 extends up to the top of the test platform 20 and is connected to a nut 52. When the test platform 20 needs to be moved, the nut 52 and the T-bolt 51 are loosened (the fastening structure 50 is in a loosened state), and at this time, the head of the T-bolt 51 can slide in the T-shaped slot 11 along with the movement of the test platform 20. When the test platform 20 is moved to the proper position, the nut 52 is screwed with the T-bolt 51 (the fastening structure 50 is in the fastened state), and at this time, the head of the T-bolt 51 is accommodated in the T-shaped groove 11 and fixed relative to the T-shaped groove 11, so that the test platform 20 is fixed on the support platform 10.
As shown in fig. 1 and 3, in the test platform assembly of the present embodiment, an escape recess 21 is provided on the top surface of the test platform 20. The inside of the escape recess 21 communicates with the through hole. The nut 52 is accommodated in the escape recess 21. The escape recess 21 prevents the nut 52 from protruding from the top surface of the test platform 20, and thus prevents the nut 52 from interfering with the installation of the integrated loading mechanism 80. In the present embodiment, the number of the through holes is 72, and the through holes are used for installing 72T-bolts 51 respectively. The plurality of T-bolts 51 and the plurality of nuts 52 are arranged in a matrix, which can more effectively fix the test platform 20 and the support platform 10.
As shown in fig. 4 and 7, in the test stage assembly of the present embodiment, the driving device 40 includes an electric speed reducer 41 and a screw rod 42. The electric speed reducer 41 is fixedly provided. The lead screw 42 is connected to the test platform 20. The screw rod 42 is matched with the electric speed reducer 41 to convert the rotary motion of the electric speed reducer 41 into a linear motion, so as to drive the test platform 20 to slide relative to the support platform 10. The speed ratio of the electric speed reducer 41 is 56:1, and millimeter-level precision adjustment can be achieved. When the test platform 20 needs to be moved, the nut 52 and the T-shaped bolt 51 are loosened, and then the test platform 20 is pushed or pulled by the electric speed reducer 41 and the lead screw 42 of the driving device 40, so that stepless movement adjustment (continuous movement adjustment) is realized. In this embodiment, the driving device 40 is one, and the lead screw 42 of the driving device 40 is connected to the middle of the testing platform 20, so that the force application to the testing platform 20 is more convenient, the problem of uneven force application due to the simultaneous action of a plurality of driving devices is avoided, the structure is simpler, and the driving is more reliable.
As shown in fig. 1, 3, 4 and 5, in the test platform assembly of the present embodiment, the test platform assembly further includes an auxiliary supporting device 60. The auxiliary support device 60 includes a mounting body 61 and an auxiliary support portion 62 provided on the mounting body 61 to be liftable. When the test platform 20 is required to slide on the support platform 10, the auxiliary support portion 62 is lifted to abut against the test platform 20, and the auxiliary support device 60 slides synchronously with the test platform 20. Because the test platform 20 has a large size and a weight of more than 110 tons, when the test platform 20 is directly pushed or pulled, the sliding friction between the test platform 20 and the supporting platform 10 is large, and the damage to the contact surface between the test platform 20 and the supporting platform 10 and the driving device 40 is large. The auxiliary supporting device 60 can bear a part of the load when abutting against the testing platform 20, thereby reducing the resistance of the testing platform 20 when sliding on the supporting platform 10.
As shown in fig. 1, 3, 4 and 5, in the test platform assembly of the present embodiment, four auxiliary supporting devices 60 are provided, and the four auxiliary supporting devices 60 are respectively disposed corresponding to four corners of the test platform 20. The auxiliary supporting means 60 further includes a roller 63 provided on the mounting body 61, a guide rail 64 engaged with the roller 63, and a hydraulic cylinder 65 connected between the auxiliary supporting portion 62 and the mounting body 61. The hydraulic cylinder 65 can be arranged to be able to lift the auxiliary support 62. Before the test platform 20 needs to be moved, the test platform 20 is uniformly jacked up by the four auxiliary supporting devices 60 for a certain load (95% of the load is required to be borne, and the test platform 20 is ensured not to leave the supporting platform 10). When the test platform 20 is moved, the roller 63 on the mounting body 61 is engaged with the guide rail 64, so that the sliding friction force caused by most of the load of the test platform 20 is converted into the rolling friction force, and the resistance of the test platform 20 is further reduced.
As shown in fig. 1, 3, and 6, in the test platform assembly of the present embodiment, the side edge of the test platform 20 extending in the sliding direction thereof protrudes outward from the support platform 10. The guide wheels 70 are provided on the bottom surface of the portion of the test platform 20 protruding from the support platform 10. The guide wheels 70 cooperate with the support platform 10 to guide the test platform 20 as the test platform 20 slides on the support platform 10. Specifically, the guide wheel 70 is connected to the test platform 20 through a rotating eccentric shaft and a rotating bearing sleeved on the rotating eccentric shaft. There is a 2mm gap between the guide wheels 70 and the support platform 10 before the test platform 20 moves. When the test platform 20 needs to be moved, the eccentric shaft is rotated to enable the guide wheel 70 to move towards the support platform 10, so that the gap between the guide wheel 70 and the support platform 10 is adjusted from 2mm to 0mm, transverse restraint is formed, and the movement straightness of the test platform 20 during movement adjustment is guaranteed.
In order to realize the installation of the integrated loading mechanisms 80 for the fatigue vibration test of the railway vehicle and meet the requirement of high-precision adjustment of the test platform 20, a large movable test platform 20 needs to be designed, each integrated loading mechanism 80 can be integrated on the test platform 20, the technical problems of dynamic adjustment and static fixation of the large test platform 20 are solved, the stepless movement adjustment of the test platform 20 with the weight of 110t is realized, and the integrated loading mechanisms are reliably and stably fixed with the support platform 10 after the adjustment is completed.
The test platform assembly of the present embodiment mainly comprises a support platform 10, a test platform 20, a driving device 40, an auxiliary supporting device 60, a guide wheel 70, and the like. The integrated loading mechanism 80 adopts a modularized integrated design, integrates a plurality of sets of loading mechanisms which need to move together, is installed on one test platform 20, and can realize the integral movement of the integrated loading mechanism 80 according to requirements. The test platform 20 is an integral cast iron platform (the integral size of the test platform 20 is 4000mm multiplied by 8000mm), the integral size meets the integrated loading requirements of each integrated loading mechanism 80 of the full-size railway vehicle, the structural strength of the test platform 20 needs to meet the dynamic loads applied in the vertical direction, the transverse direction and the longitudinal direction during the vibration test of the railway vehicle, and the test platform has good vibration resistance. The top surface of the test platform 20 is provided with a plurality of T-shaped grooves to form an integrated loading mechanism mounting part 30, and the bottom surface of the test platform 20 is a full processing plane and is used for being horizontally mounted on the supporting platform 10, so that the stability of the test platform 20 during fixing is improved. The test platform 20 and the support platform 10 are fixed by a T-shaped groove 11, a T-shaped bolt 51 and a nut 52. In order to ensure the moving function of the test platform 20 with large volume and heavy weight, the auxiliary supporting device 60 and the transverse guiding device (the guide wheel 70) which are vertically installed are designed on the test platform 20, so that the small friction resistance and the moving straightness of the test platform 20 when the test platform 20 moves are ensured.
In summary, the process of moving and stably fixing the test platform 20 of the test platform assembly is summarized as follows:
(1) the nuts 52 of all the T-bolts 51 are first loosened to make the test platform 20 movable.
(2) The load of the test platform 20 is jacked up by the hydraulic cylinder 65 of the auxiliary supporting device 60, and the sliding friction force is converted into the rolling friction force.
(3) The guide wheels 70 play a role in transversely restraining and guiding the test platform 20.
(4) The electric speed reducer 41 and the screw rod 42 of the driving device 40 are started to move the test platform 20.
(5) After the test platform 20 moves to the predetermined position, the hydraulic cylinder 65 of the auxiliary supporting device 60 is lowered, and the nuts 52 of the 72T-shaped bolts 51 are fixed, so that the test platform 20 is fixed.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the invention meets the working condition adjustment of fatigue and vibration tests of full-size railway vehicles, and the test platform can quickly and accurately realize the test size requirements of different railway vehicles. The test platform can integrate all the loading mechanisms into an integral system, realizes simultaneous movement, and saves the workload of adjusting related parts. The test platform satisfies the following functions: (1) the test platform is reliably fixed, has reliable stability and vibration resistance, and meets various impacts and vibrations with dynamic loads up to 756t in the test; (2) a flexible integrated loading mechanism mounting part is arranged on the test platform, and an integrated loading mechanism is mounted to realize a modular integrated system; (3) the test platform can realize the overall stepless movement adjustment and meet the test requirements of different railway vehicles.
In summary, the test platform for the fatigue and vibration test of the railway vehicle is required to maintain absolute static stability, and is required to be firmly fixed on the supporting platform to bear dynamic loads and additional vibration in various directions, and when the test working condition is converted, the test platform needs to be adjusted in a stepless movement mode according to the distance of different railway vehicles and then is effectively fixed after adjustment, so that the technical difficulties of dynamic high-precision adjustment and effective fixation after integral adjustment of the large-scale movable test platform are solved, and the requirements of the railway vehicle for carrying out relevant tests on the whole are met.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A test platform assembly for railway vehicle fatigue and vibration testing, comprising:
a support platform (10) fixedly arranged;
the test platform (20) is slidably arranged on the supporting platform (10), an integrated loading mechanism mounting part (30) is arranged on the top surface of the test platform (20), and the bottom surface of the test platform (20) is attached to the top surface of the supporting platform (10);
a driving device (40), wherein the driving device (40) is used for driving the test platform (20) to slide on the supporting platform (10);
a plurality of fastening structures (50), each fastening structure (50) having a fastened state in which the test platform (20) is fixed relative to the support platform (10) and a released state in which the test platform (20) is slidable relative to the support platform (10);
the side edge of the test platform (20) extending along the sliding direction of the test platform protrudes outwards out of the support platform (10), a guide wheel (70) is arranged on the bottom surface of the part of the test platform (20) protruding out of the support platform (10), and when the test platform (20) slides on the support platform (10), the guide wheel (70) is matched with the support platform (10) to guide the test platform (20);
the test platform assembly further comprises an auxiliary supporting device (60), the auxiliary supporting device (60) comprises a mounting main body (61) and an auxiliary supporting part (62) arranged on the mounting main body (61) in a lifting mode, when the test platform (20) slides on the supporting platform (10), the auxiliary supporting device (60) and the test platform (20) synchronously slide, and the auxiliary supporting part (62) rises to abut against the test platform (20);
the auxiliary supporting device (60) further comprises a roller (63) arranged on the mounting main body (61) and a guide rail (64) matched with the roller (63).
2. The test platform assembly according to claim 1, wherein a T-shaped groove (11) is formed in the top surface of the support platform (10), the fastening structure (50) comprises a T-shaped bolt (51) and a nut (52), the T-shaped bolt (51) is matched with the T-shaped groove (11), a through hole penetrating along the height direction of the test platform (20) is formed in the test platform (20), the T-shaped bolt (51) is arranged in the through hole in a penetrating manner, the head of the T-shaped bolt (51) is slidably arranged in the T-shaped groove (11), and the tail of the T-shaped bolt (51) extends upwards to the top of the test platform (20) and is connected with the nut (52).
3. Test platform assembly according to claim 2, characterized in that an avoiding recess (21) is provided on the top surface of the test platform (20), the interior of the avoiding recess (21) communicating with the through hole, the nut (52) being accommodated in the avoiding recess (21).
4. Test platform assembly according to claim 2 or 3, characterized in that a plurality of T-bolts (51) and a plurality of nuts (52) are arranged in a matrix.
5. The test platform assembly according to claim 1, wherein the driving device (40) comprises an electric speed reducer (41) and a screw rod (42), the electric speed reducer (41) is fixedly arranged, the screw rod (42) is connected to the test platform (20), and the screw rod (42) is matched with the electric speed reducer (41) to convert the rotary motion of the electric speed reducer (41) into a linear motion, so as to drive the test platform (20) to slide relative to the support platform (10).
6. Test platform assembly according to claim 1, characterized in that the auxiliary support device (60) further comprises a hydraulic cylinder (65) connected between the auxiliary support (62) and the mounting body (61).
7. Test platform assembly according to claim 1, characterized in that the number of auxiliary support means (60) is four, four auxiliary support means (60) being arranged corresponding to four corners of the test platform (20), respectively.
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| CN201710446265.8A CN107255568B (en) | 2017-06-13 | 2017-06-13 | Test platform assembly for railway vehicle fatigue and vibration test |
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| CN201710446265.8A CN107255568B (en) | 2017-06-13 | 2017-06-13 | Test platform assembly for railway vehicle fatigue and vibration test |
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| CN107255568B true CN107255568B (en) | 2020-02-07 |
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| CN109357860B (en) * | 2018-12-04 | 2021-07-20 | 中车青岛四方车辆研究所有限公司 | Bend simulation mechanism, car coupler coupling test bed and test system thereof |
| CN110987417B (en) * | 2019-11-21 | 2021-10-26 | 重庆大学 | Miniature gear durability test bench |
| CN112161822B (en) * | 2020-09-25 | 2022-11-29 | 中车长春轨道客车股份有限公司 | Dynamic test system and dynamic test method for subway vehicle |
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