CN117705427A

CN117705427A - Fatigue test device for block damper

Info

Publication number: CN117705427A
Application number: CN202311477097.0A
Authority: CN
Inventors: 尹建伟; 赵晓健; 马利宁; 王文博; 陈高升; 赖亮庆
Original assignee: Beijing Aviation Materials Research Institute Co ltd
Current assignee: Beijing Aviation Materials Research Institute Co ltd
Priority date: 2023-11-07
Filing date: 2023-11-07
Publication date: 2024-03-15

Abstract

The invention provides a block damper fatigue test device which comprises a first clamp, a second clamp and a lateral force loading monitoring system, wherein the first clamp is used for clamping a block damper in a first direction, the second clamp is used for clamping the block damper positioned at a clamping position in a second direction, the second direction is perpendicular to the first direction, the lateral force loading monitoring system is used for connecting two block dampers respectively arranged at two clamping positions, and the lateral force loading monitoring system is used for applying lateral force to the block damper, and the lateral force is parallel to the second direction. The fatigue test device for the block damper can test two block dampers simultaneously, clamps the block damper between the first clamp and the second clamp, and the lateral force loading monitoring system is arranged between the two block dampers, and the change of the lateral force during the test depends on the performance of the casting rubber in the block damper, so that the fatigue test device is more in line with the actual working state of the block damper.

Description

Fatigue test device for block damper

Technical Field

The invention relates to the technical field of damper performance test, in particular to a fatigue test device for a block damper.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

The block damper is a key functional component of a helicopter rotor system, the block damper bears axial force in the helicopter flight process, the inner joint and the outer joint move relatively along the axial direction at a certain frequency under the action of the axial force, constant lateral force exists between the inner joint and the outer joint, and fatigue failure can occur to the block damper under the superposition of the axial force and the lateral force. Therefore, the working state of the block damper is simulated through the test, the reasonable working time of the block damper is determined to have very important significance for the flight safety and cost control of the helicopter, and the fatigue test is also an important means for researching the structure, the material and the process improvement of the block damper.

In the existing test technology, only one block damper can be subjected to fatigue test at a time, and the test consumes long time and has low efficiency. And because the lateral force is applied by adopting a weight hanging mode when a single block damper is tested, the lateral force is reacted on the rack, the clamp and other parts of the testing machine, the clamp is easy to damage, the abrasion of a piston sealing ring of the testing machine is accelerated, and the oil leakage phenomenon occurs.

Disclosure of Invention

The invention aims to at least solve the problem of low fatigue test efficiency of the existing block damper. The aim is achieved by the following technical scheme:

the invention provides a fatigue test device for a block damper, which comprises:

a first clamp having two clamping positions for placing a block damper, the first clamp being for clamping the block damper in a first direction;

a second clamp for clamping the block damper at the clamping position in a second direction, the second direction being perpendicular to the first direction;

and the lateral force loading monitoring system is used for connecting two block-shaped dampers respectively arranged in the two clamping positions, and is used for applying lateral force to the block-shaped dampers along the second direction.

The fatigue test device for the block damper comprises a first clamp, a lateral force loading monitoring system and a second clamp. Two block dampers can be tested simultaneously every time, the block dampers are clamped between the first clamp and the second clamp, the lateral force loading monitoring system is arranged between the two block dampers, the change of the lateral force during the test depends on the performance of the casting rubber in the block dampers, and the actual working state of the block dampers is more met. The magnitude of the lateral force is measured by a sensor placed between the two block-shaped dampers and is displayed by a digital display. The invention provides a block damper test device for simultaneously testing two block dampers, lateral forces are mutually offset, test time is saved, test efficiency is improved, damage of the lateral forces to the test device is eliminated, and service life of the test device is prolonged.

In addition, the block damper fatigue test device according to the present invention may further have the following additional technical features:

in some embodiments of the invention, the first clamp comprises:

the fixture body is provided with a mounting hole, the mounting hole extends through the fixture body along a third direction, the third direction is perpendicular to the first direction and the second direction respectively, and two clamping positions are respectively positioned at two axial ends of the mounting hole;

the two clamping block assemblies are respectively arranged at the two axial ends of the mounting hole and are used for clamping the block damper in the first direction.

In some embodiments of the invention, the cartridge assembly comprises:

two clamping block pieces which are respectively arranged at two sides of the mounting hole along the first direction;

the clamping block pieces are connected with the clamp body through the first adjusting pieces, and the first adjusting pieces are used for adjusting the positions of the clamping block pieces relative to the clamp body along the first direction.

In some embodiments of the invention, the second clamp comprises;

a base;

and the two clamping plate assemblies are arranged on the base, the positions of the two clamping plate assemblies respectively correspond to the two clamping positions, and the clamping plate assemblies are used for clamping the block damper in the second direction.

In some embodiments of the invention, the cleat assembly comprises:

the two vertical plates are arranged on the base and are arranged at intervals along the second direction;

two clamping plates;

the two clamping plates are connected with the two vertical plates through one second adjusting piece respectively, and the second adjusting piece is used for adjusting the relative positions of the clamping plates along the second direction and the vertical plates.

In some embodiments of the present invention, the first fixture further includes a guide rod, one end of the guide rod is connected to the fixture body, the other end of the guide rod extends along the first direction in a direction away from the fixture body, the second fixture further includes a guide sleeve, the guide sleeve is connected to the base, the guide sleeve extends along the first direction, at least part of the guide sleeve and the vertical plate are located on the same side of the base along the second direction, and the guide rod is inserted into the guide sleeve in a pluggable manner.

In some embodiments of the present invention, the base is provided with a plug hole, the guide sleeve is inserted in the plug hole, two ends of the guide sleeve extend along the second direction towards a direction away from the base, one end of the guide sleeve away from the clamping plate assembly is provided with a connecting hole, and the second clamp further comprises:

the pin shaft penetrates through the connecting hole;

the inner ring of the joint bearing is sleeved on the pin shaft;

the cotter pin is sleeved on the outer ring of the knuckle bearing;

the lock nut is sleeved on the guide sleeve, the guide sleeve is provided with external threads, the lock nut is in threaded connection with the external threads, and the lock nut can move along the axial direction of the guide sleeve so as to be in butt joint with the base.

In some embodiments of the invention, the lateral force loading monitoring system comprises:

a first tensioning block for connection with one of the block dampers;

the second tensioning block is used for being connected with the other block damper;

the two ends of the shaft assembly are respectively connected with the first tensioning block and the second tensioning block;

a sensor coupled to the shaft assembly, the sensor configured to detect a force in the third direction experienced by the shaft assembly;

and a loading assembly for applying a force to the shaft assembly in the third direction to urge the second tensioning block closer to the first tensioning block.

In some embodiments of the present invention, the second tensioning block is provided with a connection screw hole extending in the third direction, the connection screw hole penetrating the second tensioning block, the shaft assembly comprising:

the two ends of the supporting rod are respectively connected with the first tensioning block and the sensor;

the dowel bar is coaxially arranged with the support bar, and one end of the dowel bar is connected with the sensor;

the loading assembly includes:

the loading screw is in threaded connection with the connecting screw hole, and one end of the loading bolt is connected with the other end of the dowel bar;

the locking screw is in threaded connection with the connecting screw hole and is connected with the other end of the loading screw.

In some embodiments of the present invention, the fixture body is provided with a threading hole, the threading hole is communicated with the mounting hole, the threading hole corresponds to the sensor in position, and the support rod is used for being rotatably connected with the first tensioning block.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 schematically shows a schematic structure of a block damper according to the prior art;

FIG. 2 schematically shows a schematic cross-sectional structure in the direction B in FIG. 1;

FIG. 3 schematically shows a schematic view of the structure in the direction A in FIG. 1;

FIG. 4 schematically shows an overall structural schematic of a block damper fatigue test apparatus according to an embodiment of the present invention; the method comprises the steps of carrying out a first treatment on the surface of the

FIG. 5 schematically shows a schematic cross-sectional structure of the E-direction of FIG. 4;

FIG. 6 schematically illustrates a schematic structural view of a first clamp of a block damper fatigue testing device according to an embodiment of the present invention;

FIG. 7 schematically illustrates a structural diagram of a second view of a first clamp of a block damper fatigue testing device according to an embodiment of the present invention;

FIG. 8 schematically illustrates a structural schematic diagram of a third view of a first clamp of a block damper fatigue testing device according to an embodiment of the present invention;

FIG. 9 schematically illustrates a schematic structural diagram of a lateral force loading monitoring system of a block damper fatigue test device according to an embodiment of the present invention;

FIG. 10 schematically illustrates a schematic view of a wire lead of a sensor of a block damper fatigue test device according to an embodiment of the present invention;

FIG. 11 schematically illustrates a structural schematic diagram of a first view of a second clamp of a block damper fatigue testing device according to an embodiment of the present invention;

FIG. 12 schematically illustrates a structural diagram of a second view of a second clamp of a block damper fatigue testing device according to an embodiment of the present invention;

FIG. 13 schematically illustrates a structural diagram of a third view of a second clamp of a block damper fatigue testing device according to an embodiment of the present invention;

FIG. 14 schematically illustrates a structural diagram of a first clamp of a block damper fatigue test device according to an embodiment of the present invention at a first perspective after assembly with a block damper;

FIG. 15 schematically illustrates a structural diagram of a first clamp of a block damper fatigue test device according to an embodiment of the present invention from a second perspective after assembly with a block damper;

fig. 16 schematically shows a schematic cross-sectional structure of the F direction of fig. 15;

FIG. 17 schematically illustrates a cross-sectional structural schematic view of a first clamp of a block damper fatigue test device in accordance with an embodiment of the present invention, assembled with a lateral force loading monitoring system;

the reference numerals are as follows:

100. a block damper fatigue test device;

10. a first clamp; 20. a second clamp; 30. a lateral force loading monitoring system;

11. a first side plate; 12. an outer joint; 13. an inner joint; 14. a second side plate; 131. a groove;

21. a first bolt; 22. a first nut; 23. a pull rod; 24. a clamping block piece; 25. a clamp body; 251. a mounting hole; 26. a guide rod; 27. a second nut; 28. a threading hole;

31. a first tensioning block; 32. a support shaft; 33. a sensor; 34. a dowel bar; 35. a second tensioning block; 36. loading a screw; 37. a locking screw;

41. a knuckle bearing; 42. a pin shaft; 43. a lock nut; 44. a cotter pin; 45. a guide sleeve; 46. a base; 47. a clamping plate; 48. a vertical plate; 415. a first set screw; 416. a second set screw; 417; a first elongated aperture; 418. a second elongated aperture;

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such 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 the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

As shown in fig. 1 to 17, the present invention proposes a block damper fatigue test apparatus 100 including:

a first clamp 10 having two clamping positions for placing the block damper, the first clamp 10 for clamping the block damper in a first direction;

a second clamp 20 for clamping the block damper at the clamping position in a second direction, the second direction being perpendicular to the first direction;

the lateral force loading monitoring system 30 is used for connecting two block-shaped dampers respectively arranged in two clamping positions, and the lateral force loading monitoring system 30 is used for applying lateral force to the block-shaped dampers, wherein the lateral force is parallel to the second direction.

It will be appreciated that the first direction may be understood as the axial direction of the block damper, the second direction may be understood as the radial direction of the block damper, the block damper is composed of a first side plate 11, a second side plate 14, an outer joint 12 and an inner joint 13, the outer joint 12 is rigidly connected to two side plates, the inner joint 13 is filled with elastic rubber in the gap between the outer joint 12 and the side plates, the inner joint 13 can move relative to the outer joint 12 and the side plates when stressed, a buffering effect is achieved, grooves 131 are arranged at two axial ends of the inner joint 13, and the grooves 131 are used for connecting external structures. The first clamp 10 and the second clamp 20 can be realized through a clamping plate 47 mechanism, and the distance between two clamping plates 47 of the clamping plate 47 mechanism can be adjusted to tighten the block damper, and the clamping directions of the first clamp 10 and the second clamp 20 are perpendicular, so that the first clamp 10 and the second clamp 20 can clamp the block damper from different directions, and the stability of the block damper in testing is improved. Specifically, the clamping direction of the first clamp 10 may be set to the axial direction of the block damper (the direction D in fig. 2), and the clamping direction of the second clamp 20 may be set to the radial direction of the block damper (the direction D in fig. 2). The lateral force loading monitoring system 30 can be embedded and connected between two block dampers, the lateral force loading monitoring system 30 is provided with a sensor 33, the sensor 33 can adopt the existing sensor 33 capable of measuring pressure, when the lateral force loading monitoring system 30 applies lateral force to the block dampers, pouring rubber in the block dampers can generate force opposite to the lateral force, and at the moment, the sensor 33 can generate pressure signals, namely lateral force measuring signals, so that fatigue test of the block dampers is realized.

The block damper fatigue test device 100 provided by the invention comprises a first clamp 10, a lateral force loading monitoring system 30 and a second clamp 20. Two block dampers can be tested simultaneously each time, the block dampers are clamped between the first clamp 10 and the second clamp 20, the lateral force loading monitoring system 30 is arranged between the two block dampers, the change of the lateral force during the test depends on the performance of the casting rubber in the block dampers, and the actual working state of the block dampers is more met. The magnitude of the lateral force is measured by a sensor 33 placed between the two block dampers and is displayed by a digital display. The invention provides a block damper test device for simultaneously testing two block dampers, lateral forces are mutually offset, test time is saved, test efficiency is improved, damage of the lateral forces to the test device is eliminated, and service life of the test device is prolonged.

In some embodiments of the present invention, the first clamp 10 includes;

the clamp body 25 is provided with a mounting hole 251, the mounting hole 251 extends through the clamp body 25 along a third direction, the third direction is perpendicular to the first direction and the second direction respectively, and two clamping positions are respectively positioned at two ends of the mounting hole 251;

the two clamping block components are respectively arranged at two ends of the mounting hole 251 along the third direction, and the clamping block components are used for clamping the block damper in the first direction.

It is to be appreciated that the third direction may be understood as a radial direction of the block damper perpendicular to the second direction, the clamp body 25 may be an integrally formed structure, the clamp body 25 may be an i-shaped structure, and a mounting hole 251 penetrating through the clamp body 25 is formed in the middle, a section of the clamp body 25 along the second direction is i-shaped, four protruding portions extending from the clamp body 25 may be used as boss structures for mounting the block assembly, and a diameter of the mounting hole 251 is greater than a portion of the lateral force loading monitoring system 30 and the block damper that needs to extend into the mounting hole 251, so as to facilitate mounting. The clamp body 25 may also be a block-type structure, and the mounting holes 251 are also formed therethrough, so as to achieve the effects of mounting the clamping block assembly and the lateral force loading monitoring system 30. The two ends of the mounting hole 251 are respectively provided with a clamping block component, the clamping block component is composed of clamping blocks and corresponding adjusting mechanisms, the adjusting mechanisms can comprise first bolts 21 and first nuts 22, the first bolts 21 penetrate through bolt holes in the clamp body 25, the clamping is performed through the first nuts 22, the block-shaped damper can be fastened, the clamping blocks are connected with the clamp body 25 through the adjusting mechanisms, and the clamping degree of the clamping blocks to the block-shaped damper can be adjusted through the adjusting mechanisms. The two block assemblies are arranged to clamp the block-shaped damper respectively, so that stability of the block-shaped damper in test is improved, two block-shaped dampers are tested simultaneously by one test device, and test efficiency is improved.

In some embodiments of the present invention, the second clamp 20 includes;

a base 46;

two clamping plate 47 assemblies are arranged on the base 46, the positions of the two clamping plate 47 assemblies respectively correspond to the two clamping positions, and the clamping plate 47 assemblies are used for clamping the block damper in the second direction.

It will be appreciated that the base 46 may refer to the existing base 46 structure, the two clamping plate 47 assemblies are arranged at corresponding mounting positions respectively, the clamping plate 47 assemblies may be clamping plates 47 and corresponding fixing structures, the clamping plates 47 are arranged on the base 46 by the fixing structures, the clamping plates 47 may be arranged to be in a clampable structure, the clamping degree of the clamping plates 47 to the block damper is adjusted by bolts, the clamping plates 47 may be further provided with bolt holes, and the clamping plates 47 are penetrated through the bolt holes and then screwed with the block damper by bolts to fix the block damper.

In some embodiments of the present invention, the lateral force loading monitoring system 30 includes:

a first tensioning block 31 for connection with a block damper;

a second tensioning block 35 for connection with another block damper;

the two ends of the shaft assembly are respectively connected with the first tensioning block 31 and the second tensioning block 35;

a sensor 33 connected to the shaft assembly, the sensor 33 being configured to sense a force in a third direction received by the shaft assembly;

the loading assembly is used for applying force along the third direction to the shaft assembly so as to drive the second tensioning block 35 to be close to the first tensioning block 31.

It will be appreciated that the first tensioning block 31 may be shaped to fit the nipple 13 of the block damper, for example, configured cylindrically, the end of the first tensioning block 31 remote from the block damper may be provided with a first connection sleeve, the interior of which may be provided with a lateral force loading monitoring system 30, the second tensioning block 35 may likewise be shaped to fit the nipple 13 of the block damper, for example, configured cylindrically, the end of the second tensioning block 35 remote from the block damper may be provided with a second connection sleeve, the interior of which may be provided with a lateral force loading monitoring system 30, and which may also be fixedly connected to the first connection sleeve. The shaft assembly can be provided with a plurality of coaxially connected rods according to actual installation requirements. The sensor 33 may optionally employ an existing pressure sensor 33 to sense lateral forces. The sensor 33 may be coaxially connected to the shaft assembly by screwing, and disposed in the middle section of the shaft assembly. The loading assembly may be a rod-type structure and movable in a third direction and locked in any position, and by moving the loading assembly, the second tensioning block 35 may be urged closer to the first tensioning block 31, exerting a lateral force on the block damper.

In some embodiments of the present invention, a cartridge assembly includes:

two latch members 24 respectively provided at both sides of the mounting hole 251 in the first direction;

and two first adjusting members respectively connected to the two clamping blocks 24, the clamping blocks 24 being connected to the clamp body 25 by the first adjusting members, the first adjusting members being used for adjusting the positions of the clamping blocks 24 relative to the clamp body 25 in the first direction.

It will be appreciated that the latch member 24 may be of a block-type construction and have a gripping surface that is adapted to the outer surface of the block-type damper, such as being inclined in accordance with the degree of inclination of the block-type damper. The latch 24 is fixed to the clamp body 25 by a first adjuster, such as a first bolt 21 and a first nut 22, and the latch 24 may be disposed on a protrusion of the clamp body 25. The protruding portion is provided with a bolt hole, and the bolt hole is penetrated through by the first bolt 21, and the first nut 22 is tightened, so that the clamping block piece 24 can move in the first direction, and the degree of clamping the block damper is adjusted.

In some embodiments of the present invention, the cleat 47 assembly comprises:

two vertical plates 48 disposed on the base 46, the two vertical plates 48 being disposed at intervals along the second direction;

two clamping plates 47;

the two clamping plates 47 are respectively connected with the two vertical plates 48 through a second adjusting member, and the second adjusting member is used for adjusting the relative positions of the clamping plates 47 and the vertical plates 48 along the second direction.

It will be appreciated that the vertical plate 48 may be a plate-type structure, where the vertical plate 48 is defined on the base 46 by welding or bolts, for example, the vertical plate 48 is fixed by threading a second fixing screw 416 through a second elongated hole 418 formed in the base 46 and then screwing the second elongated hole 418 with the vertical plate 48, and the second elongated hole 418 facilitates adjusting the position of the vertical plate 48. The clamping plate 47 is connected with the vertical plate 48 through bolts, bolts can be arranged on the clamping plate 47 and used for connecting the vertical plate 48, namely, the clamping plate 47 and the vertical plate 48 can be connected by tightening the bolts, a plurality of bolts, for example, four bolts in a rectangular array, can be arranged on the vertical plate 48, and the stability of connection is improved. The connecting bolts between the vertical plate 48 and the clamping plate 47 can be four bolts arranged in a rectangular array, so that the reliability of connection is improved. A plurality of first set screws 415, for example, four first set screws 415 arranged in a rectangular array, may also be provided on the clamping plate 47 for clamping the block damper. The first fixing screw 415 may be inserted into the first elongated hole 417 on the clamping plate 47, so as to achieve fine adjustment of the first fixing screw 415.

In some embodiments of the present invention, the first fixture 10 further includes a guide bar 26, one end of the guide bar 26 is connected to the fixture body 25, the other end of the guide bar 26 extends away from the fixture body 25 along a first direction, the second fixture 20 further includes a guide sleeve 45, the guide sleeve 45 is connected to the base 46, the guide sleeve 45 extends along the first direction, at least a portion of the guide sleeve 45 is located on the same side of the base 46 as the vertical plate 48 along a second direction, and the guide bar 26 is inserted into the guide sleeve 45 in a pluggable manner.

In some embodiments of the present invention, the first fixture 10 further includes a pull rod 23, where the pull rod 23 is coaxially disposed with the guide rod 26 and is disposed at two ends of the fixture body 25 along the first direction, respectively. The tie rod 23 is fastened by a second nut 27.

It will be appreciated that the first clamp 10 and the second clamp 20 are connected by plugging the guide rod 26 into the guide sleeve 45, so that the axial coincidence of the axis of the guide rod 26 and the clamp is ensured, the lateral force is prevented, the accuracy of measuring the test force is improved, and the test device and the clamp are protected. The guide rod 26 may be a round rod type structure, the guide sleeve 45 may be a cylindrical structure, and the guide rod 26 may be connected to the clamp body 25 by welding or plugging, and fastened by screwing the second nut 27. The guide sleeve 45 can be connected with the base 46 in a welding or inserting mode, and the guide rod 26 and the guide sleeve 45 are coaxially arranged and are arranged at the center axis position of the whole test device. After the block damper is clamped on the first clamp 10 in use, the guide rod 26 and the guide sleeve 45 can be in plug-in fit, and then the second clamp 20 is used for further clamping the block damper.

In some embodiments of the present invention, the second tension block 35 is provided with a connection screw hole extending in a third direction, the connection screw hole penetrating the second tension block 35, and the shaft assembly includes:

the two ends of the supporting rod are respectively connected with the first tensioning block 31 and the sensor 33;

the dowel bar 34 is coaxially arranged with the support bar, and one end of the dowel bar 34 is connected with the sensor 33;

the loading assembly includes:

the loading screw 36 is in threaded connection with the connecting screw hole, and one end of the loading screw is connected with the other end of the dowel bar 34;

the locking screw 37 is screwed with the connecting screw hole and is connected with the other end of the loading screw 36.

It will be appreciated that the support rod and the dowel bar 34 are rod-shaped, the first tensioning block is fixed with the inner joint 13 of the block damper by screws before the test, the second tensioning block is fastened with the inner joint 13 of the other block damper, the two ends of the sensor 33 are fastened with the support shaft 32 and the dowel shaft by threads, then the support shaft 32 is inserted into the first tensioning block and fastened by screws, then the block damper is clamped on the left side of the first clamp 10, the second tensioning block fastened on the other block damper is sleeved on the dowel bar 34, and then the other block damper is clamped on the right side of the first clamp 10, so that the installation between the two block dampers and the first clamp 10 is completed.

In some embodiments of the present invention, the clamp body 25 is provided with a threading hole 28, the threading hole 28 communicates with a mounting hole 251, and the threading hole 28 is located corresponding to the sensor 33, and the support rod is used to rotatably connect with the first tensioning block 31. The position of the supporting shaft 32 is adjusted to enable the outgoing line of the sensor 33 to pass through the threading hole 28 of the clamp body 25, so that interference between the outgoing line of the sensor 33 and the clamp body 25 in the test process is avoided.

In some embodiments of the present invention, the base 46 is provided with a plugging hole, the guide sleeve 45 is inserted into the plugging hole, two ends of the guide sleeve 45 extend along the second direction away from the base 46, one end of the guide sleeve 45 away from the clamping plate 47 assembly is provided with a connecting hole, and the second clamp 20 further comprises:

the pin shaft 42 is penetrated through the connecting hole;

the joint bearing 41, the inner ring of the joint bearing 41 is sleeved on the pin shaft 42;

the cotter pin 44 is sleeved on the outer ring of the knuckle bearing 41;

the lock nut 43 is sleeved on the guide sleeve 45, the guide sleeve 45 is provided with external threads, the lock nut 43 is in threaded connection with the external threads, and the lock nut 43 can move along the axial direction of the guide sleeve 45 to be in abutting connection with the base 46.

It will be appreciated that the lower portion of the second clamp 20 employs an articulating mechanism which allows for more reasonable force loading of the second clamp 20 during testing by adjusting the angle between the cotter pin 44 and the second clamp 20.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A block damper fatigue test device, comprising:

2. The block damper fatigue test device of claim 1, wherein the first clamp comprises:

3. The block damper fatigue test device of claim 2, wherein the cartridge assembly comprises:

4. The block damper fatigue test device of claim 1, wherein the second clamp comprises;

a base;

5. The block damper fatigue test apparatus of claim 4, wherein the cleat assembly comprises:

two clamping plates;

6. The block damper fatigue test device according to claim 5, wherein the first clamp further comprises a guide rod, one end of the guide rod is connected with the clamp body, the other end of the guide rod extends away from the clamp body along the first direction, the second clamp further comprises a guide sleeve, the guide sleeve is connected with the base, the guide sleeve extends along the first direction, at least part of the guide sleeve and the vertical plate are located on the same side of the base along the second direction, and the guide rod is inserted into the guide sleeve in a pluggable manner.

7. The block damper fatigue test device according to claim 6, wherein the base is provided with a plug hole, the guide sleeve is inserted into the plug hole, both ends of the guide sleeve extend away from the base along the second direction, one end of the guide sleeve away from the clamping plate assembly is provided with a connecting hole, and the second clamp further comprises:

the pin shaft penetrates through the connecting hole;

the inner ring of the joint bearing is sleeved on the pin shaft;

the cotter pin is sleeved on the outer ring of the knuckle bearing;

8. The block damper fatigue test device of claim 2, wherein the lateral force loading monitoring system comprises:

a first tensioning block for connection with one of the block dampers;

9. The block damper fatigue test device of claim 8, wherein the second tensioning block is provided with a connection screw hole extending in the third direction, the connection screw hole penetrating the second tensioning block, the shaft assembly comprising:

the loading assembly includes:

10. The block damper fatigue test device according to claim 9, wherein the clamp body is provided with a threading hole, the threading hole is communicated with the mounting hole, the threading hole corresponds to the sensor in position, and the support rod is used for being rotatably connected with the first tensioning block.