Static load fatigue test device for obstacle detection piece for subway

Abstract

The invention relates to the technical field of subway cowcatcher detection, and particularly discloses a subway obstacle detection piece static load fatigue test device which comprises a mounting seat. The mounting tool is arranged on the mounting seat; the power telescopic piece is arranged on the mounting tool; the force arm tool is arranged at the movable end of the power telescopic part, and the end, away from the power telescopic part, of the force arm tool is used for being connected with a cowcatcher fixed to an installation base; and the force sensor is connected between the movable end of the power telescopic piece and the force arm tool. According to the invention, the static strength and fatigue strength of the cowcatcher can be tested conveniently, so that whether the cowcatcher meets the product requirements or not can be judged.

Description

Technical Field

[0001] The present application relates to the technical field of subway obstacle clearer detection, and in particular to a static load fatigue test device for subway obstacle detection components. Background Art

[0002] A cowcatcher is an obstacle detection device used at the head of a subway. The front end of the cowcatcher is usually designed as a V-shaped structure, which can push obstacles on the track out of the track to prevent obstacles on the track from entering between the wheels and the track and causing the subway to derail. When the cowcatcher moves with the subway, it can push out obstacles on the track, so the cowcatcher will be subject to a large reaction force, so the cowcatcher needs a certain strength to ensure normal operation.

[0003] Therefore, it is necessary to design a test device that can perform both static strength test and fatigue strength test of the snowplow, so as to determine whether a sample snowplow selected from a batch of products meets the product requirements. Summary of the invention

[0004] In order to facilitate the testing of the static load strength and fatigue strength of the obstacle remover, the present application provides a static load fatigue testing device for an obstacle detection piece for a subway.

[0005] The present application provides a static load fatigue test device for subway obstacle detection parts, which adopts the following technical solutions: A static load fatigue test device for subway obstacle detection parts, comprising: Mounting seat; An installation tool is arranged on the installation seat; A power telescopic member, arranged on the installation tool; A lever arm tooling is arranged at the movable end of the power telescopic member, and an end of the lever arm tooling away from the power telescopic member is used to connect with a snow remover fixed on a mounting seat; The force sensor is connected between the movable end of the power telescopic member and the lever arm tooling.

[0006] By adopting the above technical solution, both ends of the obstacle remover are fixedly connected to the mounting seat, and the lever arm tooling is installed between the movable end of the power telescopic component and the obstacle remover. The movable end of the power telescopic component applies a constant force to the obstacle remover to carry out a static strength test; the movable end of the power telescopic component moves back and forth to apply a fatigue load to the obstacle remover. After the test, it is determined whether the obstacle remover meets the requirements by observing whether it breaks or cracks. Therefore, the device can detect both the static strength of the obstacle remover and whether the fatigue strength of the obstacle remover meets the requirements.

[0007] Optionally, the force arm tooling includes a connecting frame and a mounting block, the connecting frame is connected to the force sensor, the mounting block is arranged on a side of the connecting frame away from the force sensor, two mounting blocks are provided and arranged at intervals, and a mounting groove for inserting the obstacle remover is provided on the side where the mounting block and the connecting frame are close to each other, the inner wall of the mounting groove can be tightly pressed against the obstacle remover, and the mounting block and the connecting frame are detachably connected.

[0008] By adopting the above technical solution, two mounting blocks are provided, so that load can be applied to both ends of the snow remover, which can reduce stress concentration and help ensure the test effect; since the mounting block and the connecting frame are detachably connected, it is convenient to install the snow remover between the mounting block and the connecting frame, and it is also convenient to remove the snow remover after testing.

[0009] Optionally, a flexible pad for abutting against the obstacle remover is provided on the inner wall of the mounting groove.

[0010] By adopting the above technical solution, the stress concentration caused by the hard contact between the wall surface at the end of the installation groove and the obstacle remover can be weakened, thereby obtaining more accurate test results.

[0011] Optionally, a positioning plate is fixedly provided on the mounting seat, and one end of the power telescopic member away from the mounting tool is fixedly connected to the positioning plate.

[0012] By adopting the above technical solution, the positioning plate and the installation tooling are respectively arranged at the two ends of the power telescopic component, thereby improving the stability of the power telescopic component during operation.

[0013] Optionally, a universal joint assembly is connected between the output end of the power telescopic member and the force sensor, and a rounded corner is provided at the connection between the universal joint assembly and the force sensor.

[0014] By adopting the above technical solution, the stress concentration at the connection of the force sensor can be weakened, and the possibility of the connection being broken can be reduced, thereby ensuring the smooth progress of the test.

[0015] Optionally, a threaded hole is provided on the connecting frame, and a mounting hole coaxially arranged with the threaded hole is provided on the mounting block. A locking bolt is passed through both the threaded hole and the mounting hole. A through hole is provided on the head of the locking bolt, and a metal wire is passed through the through hole. The metal wire passes through the through holes on the locking bolts on the two mounting blocks, and a tensioning mechanism for tightening the metal wire is provided on the connecting frame.

[0016] By adopting the above technical scheme, the locking bolt can fix the mounting block on the connecting frame. After the metal wire passed through the locking bolt is tensioned, the rotation of the locking bolt can be restricted, thereby reducing the possibility of accidental rotation of the locking bolt after tightening, thereby avoiding the loosening of the locking bolt caused by vibration during the test, and ensuring the locking effect between the mounting block and the connecting frame, so that the mounting block and the connecting frame are pressed against both sides of the obstacle remover. Relative sliding is not likely to occur between the mounting block and the obstacle remover and between the connecting frame and the obstacle remover, so the load application point can be kept constant, which helps to ensure the accuracy of the test.

[0017] Optionally, the tensioning mechanism includes a first rotating column, a second rotating column, a driving gear, a driven gear and a driving assembly, the first rotating column and the second rotating column are both rotatably set on the connecting frame, the first rotating column and the second rotating column are arranged in parallel, one end of the metal wire is fixedly connected to the first rotating column, a first rope hole is opened on the second rotating column, the other end of the metal wire passes through the first rope hole and is fixedly connected to the second rotating column, the driving gear is coaxially fixedly connected to the second rotating column, the driven gear is coaxially fixedly connected to the first rotating column, the driving gear and the driven gear are meshed, and the driving assembly is arranged on the connecting frame, and the driving assembly is used to drive the second rotating column to rotate.

[0018] By adopting the above technical solution, the driving component drives the second rotating column to rotate, which can cause the driving gear to rotate, and the driven gear rotates accordingly, so that the first rotating column and the second rotating column rotate in opposite directions, gradually tightening the metal wire, and the tensioning process is easy to operate.

[0019] Optionally, the driving assembly includes a worm wheel and a worm, the worm wheel is coaxially fixedly connected to the second rotating column, the worm is rotatably arranged on the connecting frame, and the worm and the worm wheel are meshed.

[0020] By adopting the above technical solution, rotating the worm can drive the worm wheel to rotate, and the worm wheel drives the second rotating column to rotate, thereby gradually tightening the metal wire. Since the worm and the worm wheel can be self-locking, that is, the rotation of the worm wheel cannot cause the worm to rotate, the worm wheel can stop at the current position after the worm stops rotating, thereby keeping the metal wire in a tensioned state and limiting the rotation of the locking bolt.

[0021] Optionally, a second rope hole is opened on the worm, and one end of the metal wire passing through the first rope hole passes through the second rope hole and is fixedly connected to the worm.

[0022] By adopting the above technical solution, one end of the metal wire is passed between the second rotating column and the worm, and the metal wire between the second rotating column and the worm is in a taut state. Therefore, when the vibration causes the worm to have a tendency to rotate, the metal wire will limit the rotation of the worm and the second rotating column, thereby reducing the impact of the vibration on the worm and reducing the possibility of accidental rotation of the worm, thereby ensuring the tensioning effect of the metal wire.

[0023] Optionally, an anti-rotation mechanism is arranged between the worm and the connecting frame, and the anti-rotation mechanism includes a limiting ring, a pawl and an elastic member. The limiting ring is fixedly connected to the connecting frame, the limiting ring is coaxially sleeved on the outer side of the worm, and the inner wall of the limiting ring is annularly provided with a plurality of grooves adapted to the pawl. The pawl is rotatably arranged on the worm, and the elastic member is connected between the pawl and the worm. The elastic member makes the pawl press against the inner wall of the groove, so that the worm can only rotate in one direction and tension the metal wire.

[0024] By adopting the above technical solution, the cooperation between the ratchet and the slot on the limit ring allows the worm to rotate only in the direction of tightening the metal wire, thereby preventing the worm from rotating in the opposite direction, thereby ensuring the tensioning effect on the metal wire.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. This device can detect both the static strength of the snowplow and whether the fatigue strength of the snowplow meets the requirements, and has stronger applicability.

[0026] 2. When the worm rotates, the worm wheel can rotate, and the worm wheel drives the second rotating column to rotate. With the cooperation of the driving gear and the driven gear, the second rotating column and the first rotating column can rotate in opposite directions, thereby tightening the metal wire. After the worm stops rotating, the metal wire can be maintained in a tensioned state due to the self-locking between the worm and the worm wheel, thereby limiting the rotation of the locking bolt through the metal wire, which can ensure the fixed connection effect between the mounting block and the connecting frame, so that the point of action of the load applied to the snow remover remains constant, which helps to ensure the accuracy of the test results.

[0027] 3. One end of the metal wire is connected between the second rotating column and the worm. This part of the metal wire is in a tensioned state, thereby limiting the rotation of the worm, thereby reducing the possibility of accidental rotation of the worm and further ensuring the tensioning effect of the metal wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the snow clearer; Figure 2 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 3 It is a left side view of Example 1 of the present application; Figure 4is a top view of Example 1 of the present application; Figure 5 This is a schematic diagram of the structure of the universal joint assembly and the adapter used to illustrate the embodiment 1 of the present application; Figure 6 It is a schematic diagram of the overall structure of Example 2 of the present application; Figure 7 yes Figure 6 The enlarged schematic diagram of point A in the middle; Figure 8 yes Figure 6 The enlarged schematic diagram of point B in the middle; Fig. 9 is a structural schematic diagram of Example 3 of the present application for illustrating a tensioning mechanism; Fig.10 yes Fig. 9 The enlarged schematic diagram of the center C; Fig.11 It is a structural schematic diagram of Example 4 of the present application for demonstrating the anti-rotation mechanism.

[0029] 1. Mounting seat; 2. Mounting tool; 3. Power telescopic member; 4. Arm tool; 41. Connecting frame; 411. Tripod; 412. Support rod; 413. Protrusion; 42. Mounting block; 421. Mounting hole; 5. Tensioning mechanism; 51. First rotating column; 52. Second rotating column; 521. First rope hole; 53. Driving gear; 54. Driven gear; 55. Driving assembly; 551. Worm gear; 552. Worm; 5521. Second rope hole; 6. Anti-rotation mechanism; 61. Limiting ring; 611. Slot; 62. Ratchet; 7. Support block; 8. Mounting slot; 9. Obstacle remover; 10. Force sensor; 11. Positioning plate; 12. Universal joint assembly; 13. Adapter; 14. Locking bolt; 141. Perforation; 15. Metal wire. DETAILED DESCRIPTION

[0030] Example 1 The following is combined with Figure 1-11 This application is described in further detail.

[0031] The present application discloses a static load fatigue test device for subway obstacle detection parts. Figure 1 and Figure 2 The static load fatigue test device for subway obstacle detection parts includes a mounting seat 1, a mounting tool 2, a power telescopic member 3 and a lever arm tool 4. The mounting seat 1 is a frame body welded by a plurality of I-beams, and both ends of the obstacle remover 9 can be fixedly connected to the mounting seat 1 by bolts, so as to support the obstacle remover 9.

[0032] Reference Figure 2The installation tool 2 is L-shaped, and both ends of the installation tool 2 and the mounting seat 1 are fixedly connected by bolts. The power telescopic member 3 is an actuator, which is a key component for implementing active vibration control. The function of the actuator is to apply a control force to the control object according to a determined control law. The actuator includes a fixed end and a movable end, the fixed end is fixedly arranged on the installation tool 2, and the movable end is connected to the lever arm tool 4. In other embodiments, the power telescopic member 3 can also be a hydraulic cylinder or a pneumatic cylinder.

[0033] Reference Figure 3 and Figure 4 The lever arm tooling 4 includes a connecting frame 41 and a mounting block 42. The connecting frame 41 includes a tripod 411, a support rod 412 and a protrusion 413. The support rod 412 is welded to one end of the tripod 411, and the end of the support rod 412 away from the tripod 411 is fixedly connected to the movable end of the actuator. There are two protrusions 413, which are respectively fixedly connected to the other two ends of the tripod 411. There are two mounting blocks 42, which correspond to the protrusions 413 at both ends of the tripod 411. The mounting block 42 and the protrusion 413 are close to each other. The side is provided with a mounting groove 8 for abutting against the obstacle remover 9. A threaded hole is provided on one side of the protrusion 413 close to the mounting block 42. There are four threaded holes, which are respectively located at the four corners of the protrusion 413. A mounting hole 421 is provided on the mounting block 42, which is coaxially arranged with the corresponding threaded hole. After the locking bolt 14 is inserted into the mounting hole 421 and the locking bolt 14 is threadedly connected to the threaded hole, the head of the locking bolt 14 is pressed against the mounting block 42, and the mounting block 42 can be fixedly connected to the protrusion 413, so that the mounting block 42 and the protrusion 413 are respectively pressed against the two sides of the obstacle remover 9, and the force arm tooling 4 and the obstacle remover 9 are fixedly connected.

[0034] Therefore, when the actuator applies a constant force, the static load strength of the obstacle avoider 9 can be tested; when the actuator applies a reciprocating force, the fatigue strength of the obstacle avoider 9 can be tested. When the number of reciprocating forces reaches 10 million times, it can be observed whether the obstacle avoider 9 breaks or has cracks to determine whether the fatigue strength of the obstacle avoider 9 meets the requirements. The fatigue strength test cycle is half a year, and the actuator continuously applies fatigue load to the obstacle avoider 9 during the test.

[0035] Among them, the groove wall edge of the installation groove 8 is provided with a rounded corner, and a flexible pad is bonded to the inner wall of the installation groove 8. The flexible pad is made of rubber material and is used to abut against the obstacle remover 9, thereby reducing the stress concentration at the contact part between the lever arm tooling 4 and the obstacle remover 9, thereby ensuring the accuracy of the test results. In other embodiments, the material of the flexible pad can also be polyurethane or a flexible composite material.

[0036] Reference Figure 2The mounting seat 1 is also fixedly connected with a positioning plate 11 by bolts, and a clearance hole is provided on the positioning plate 11. The fixed end of the actuator is fixedly connected with the positioning plate 11 by bolts, and the movable end of the actuator extends out of the clearance hole, so that the positioning plate 11 can support the end of the actuator away from the mounting fixture 2, thereby improving the stability of the actuator during operation.

[0037] Reference Figure 5 A force sensor 10 is also fixedly connected between the movable end of the actuator and the support rod 412, so that it is convenient to detect the force applied by the actuator, thereby facilitating the adjustment of the force to a desired size.

[0038] A universal joint assembly 12 and an adapter 13 are connected between the movable end of the actuator and the force sensor 10, as well as between the force sensor 10 and the support rod 412. The universal joint assembly 12 can match the slight angle changes of the movable end of the actuator during reciprocating movement, thereby preventing damage to the actuator; the adapter 13 mainly plays a connecting role, facilitating the connection of two adjacent components together.

[0039] The end of the adapter 13 is provided with a rounded corner, so that the stress concentration at the connection between the adapter 13 and the universal joint assembly 12 can be reduced, thereby reducing the possibility of the adapter 13 breaking, which helps to ensure the smooth progress of the test process.

[0040] The implementation principle of Example 1 is as follows: the two ends of the deflector 9 are fixedly connected to the two sides of the mounting seat 1 by bolts, so that the deflector 9 is fixed to the mounting seat 1. Then the connecting frame 41 and the mounting block 42 are respectively placed on the two sides of the deflector 9, and the mounting grooves 8 on the connecting frame 41 and the mounting block 42 are respectively pressed against the two sides of the deflector 9; then the locking bolts 14 are screwed in to fix the mounting block 42 to the connecting frame 41, so that the force arm fixture 4 and the deflector 9 are fixedly connected. Then the fixed end of the actuator is fixedly installed on the mounting fixture 2, the force sensor 10 is placed between the movable end of the actuator and the support rod 412, and the force sensor 10 is fixedly connected to the movable end of the actuator and the support rod 412 respectively.

[0041] Under the restrictive effect of the mounting base 1 on the deflector 9, the actuator applies a constant force to the deflector 9 through the lever arm fixture 4, which can cause the deflector 9 to have a bending tendency, thereby observing whether the deflector 9 is broken or cracked, so as to determine whether the static strength of the deflector 9 meets the requirements.

[0042] When performing fatigue testing, the actuator applies a cyclic force to the obstacle remover 9 through the lever arm fixture 4, causing the obstacle remover 9 to bend repeatedly in small amplitudes. When the number of force applications reaches the required number of tests, by observing whether the obstacle remover 9 breaks or cracks, it can be determined whether the fatigue strength of the obstacle remover 9 meets the requirements.

[0043] Example 2 Reference Figure 6 and Figure 7 The difference between this embodiment and the first embodiment is that a through hole 141 is formed on the head of the locking bolt 14 in this embodiment, and a metal wire 15 is passed through the through hole 141. In this embodiment, the metal wire 15 is an iron wire. The metal wire 15 is passed through the through hole 141 on each locking bolt 14 at the same time, and a tensioning mechanism 5 for tightening both ends of the metal wire 15 is provided on the connecting frame 41, so that the tensioning mechanism 5 can make the metal wire 15 in a tightened state, and the metal wire 15 in a tightened state can limit the rotation of the locking bolt 14, thereby reducing the possibility of accidental rotation of the locking bolt 14, and ensuring the fixing effect of the locking bolt 14 on the mounting block 42, so that the load application point remains constant, which helps to ensure the accuracy of the test results.

[0044] Reference Figure 8 The tensioning mechanism 5 includes a first rotating column 51, a second rotating column 52, a driving gear 53, a driven gear 54 and a driving assembly 55. The ends of the first rotating column 51 and the second rotating column 52 are both rotatably arranged on the connecting frame 41, and the first rotating column 51 and the second rotating column 52 are arranged in parallel with each other. A first rope hole 521 is provided on the second rotating column 52, and the first rope hole 521 is a through hole, and the length direction of the first rope hole 521 is perpendicular to the axis of the second rotating column 52. The metal wire 15 is passed through the through hole 141 of the locking bolt 14; one end of the metal wire 15 is tied and fixed to the first rotating column 51, and the other end of the metal wire 15 is tied and fixed to the second rotating column 52 after passing through the first rope hole 521. The driving gear 53 is coaxially fixedly connected to the second rotating column 52, and the driven gear 54 is coaxially fixedly connected to the first rotating column 51, and the driving gear 53 and the driven gear 54 are meshed. The driving assembly 55 is disposed on the connecting frame 41, and is used to drive the second rotating column 52 to rotate. When the second rotating column 52 rotates, it drives the driving gear 53 to rotate. When the driving gear 53 rotates, it can drive the driven gear 54 to rotate in the opposite direction, so that the second rotating column 52 and the first rotating column 51 rotate in the opposite direction, and the two ends of the metal wire 15 are gradually rolled up, so as to achieve the tensioning of the metal wire 15.

[0045] Reference Figure 8The driving assembly 55 includes a worm wheel 551 and a worm 552. The worm wheel 551 is coaxially fixedly connected to the second rotating column 52; a support block 7 is welded to the connecting frame 41, and one end of the worm 552 is rotatably connected to the support block 7; the worm 552 is meshed with the worm wheel 551. Therefore, when the worm 552 rotates, it can drive the worm wheel 551 to rotate, and the worm wheel 551 drives the second rotating column 52 to rotate, thereby gradually tightening the metal wire 15. The helix lead angle of the worm 552 is smaller than the equivalent friction angle between the meshing teeth of the worm 552 and the worm wheel 551, so the worm 552 and the worm wheel 551 can be self-locking, so after the worm 552 stops rotating, the tension state of the metal wire 15 can be maintained.

[0046] The implementation principle of Example 2 is as follows: after the mounting block 42 and the connecting frame 41 are respectively placed on both sides of the snow remover 9, the locking bolt 14 is inserted and tightened, so that the mounting block 42 can be fixedly connected to the connecting frame 41, so that the lever arm fixture 4 and the snow remover 9 are fixedly connected. Then, one end of the metal wire 15 is tied and fixed to the first rotating column 51, and the metal wire 15 is passed through the through hole 141 on each locking bolt 14 in turn, and then one end of the metal wire 15 is passed through the locking bolt 14 and passed through the first rope hole 521, and then the metal wire 15 is wound several times and the metal wire 15 and the second rotating column 52 are tied and fixed.

[0047] Then the worm 552 is rotated, and the worm 552 drives the worm wheel 551 to rotate, so that the second rotating column 52 rotates, and with the cooperation of the driving gear 53 and the driven gear 54, the second rotating column 52 and the first rotating column 51 can rotate in opposite directions, so that the two ends of the metal wire 15 are gradually rolled onto the second rotating column 52 and the first rotating column 51, so that the metal wire 15 is tightened. The taut metal wire 15 can limit the rotation of the locking bolt 14, thereby reducing the impact of vibration on the locking bolt 14 during the fatigue test, and can keep the load action position constant, thereby ensuring the accuracy of the test results.

[0048] After the test, the worm 552 is rotated in the reverse direction to relax the wire 15. The wire 15 and the second rotating column 52 are then disassembled and the wire 15 is pulled out from the first rope hole 521 and the through hole 141 in turn. This can remove the restriction of the wire 15 on the locking bolt 14. The locking bolt 14 is then unscrewed and the mounting block 42 can be removed. The obstacle remover 9 can then be removed to observe whether the obstacle remover 9 has defects.

[0049] Example 3 Reference Fig. 9 and Fig.10 The difference between this embodiment and embodiment 2 is that a second rope hole 5521 is provided on the worm 552 in this embodiment, the second rope hole 5521 is a through hole, and the length direction of the second rope hole 5521 is perpendicular to the axis of the worm 552.

[0050] After the metal wire 15 is tied and fixed to the second rotating column 52, the worm 552 is rotated to tighten the metal wire 15. Then, one end of the metal wire 15 is led outward through the first rope hole 521, and the end of the metal wire 15 is passed through the second rope hole 5521 on the worm 552, and then the end of the metal wire 15 is wound around the worm 552, and the end of the metal wire 15 is tied and fixed to the worm 552. Since the end of the metal wire 15 is tied and fixed to the worm 552, when the worm 552 has a tendency to rotate, it will have a tendency to roll up the end of the metal wire 15, so that the end of the metal wire 15 close to the worm 552 has a tendency to be pulled outward.

[0051] At this time, the metal wire 15 is in a stretched state. When the rotation of the worm 552 causes the metal wire 15 passing through the locking bolt 14 to be tightened, the worm 552 cannot continue to rotate because the metal wire 15 has been tightened. When the rotation of the worm 552 causes the metal wire 15 passed through the locking bolt 14 to tend to loosen, the second rotating column 52 will tend to rotate. Since the portion of the metal wire 15 passing through the first rope hole 521 is tied and fixed to the second rotating column 52, the rotation of the second rotating column 52 will cause the portion of the metal wire 15 close to the first rope hole 521 to rotate, causing the end of the metal wire 15 close to the second rotating column 52 to tend to be rolled up, that is, the end of the metal wire 15 close to the second rotating column 52 to tend to be pulled outward; and the worm 552 can cause the end of the metal wire 15 close to the worm 552 to tend to be pulled outward, so that the end of the metal wire 15 close to the second rotating column 52 and the end of the metal wire 15 close to the worm 552 will tend to move toward the side away from each other, thereby limiting the rotation of the worm 552 through the metal wire 15. That is, no matter whether the worm 552 has a tendency to rotate forward or reverse, the rotation of the worm 552 will be restricted, thereby reducing the impact of the vibration in the test on the worm 552, making it difficult for the worm 552 to rotate, further enhancing the stability of the tightened metal wire 15, making it difficult for the metal wire 15 to loosen, thereby ensuring the restriction effect on the locking bolt 14.

[0052] When the metal wire 15 needs to be removed, first loosen the binding between the metal wire 15 and the second rope hole 5521, and then pull the metal wire 15 out of the second rope hole 5521; then loosen the binding between the metal wire 15 and the first rope hole 521, and then pull the metal wire 15 out of the first rope hole 521; then pull the metal wire 15 out of the through hole 141 on each locking bolt 14; therefore, the device can be reused.

[0053] Example 4 Reference Fig.11The difference between this embodiment and embodiment 2 is that an anti-rotation mechanism 6 is provided between the worm 552 and the support block 7 in this embodiment. The anti-rotation mechanism 6 includes a limit ring 61, a ratchet 62 and an elastic member. The limit ring 61 is a circular ring, fixedly connected to the support block 7, and coaxially sleeved on the outer side of the worm 552; a plurality of slots 611 are provided on the inner wall of the limit ring 61. The ratchet 62 is rotatably connected to the worm 552, and the rotation axis of the ratchet 62 is parallel to the axis of the worm 552. The elastic member is a torsion spring, which is fixedly connected between the pawl 62 and the worm 552. The axis of the elastic member and the rotation axis of the pawl 62 are coaxially arranged. Therefore, the elastic member makes the pawl 62 press against the slot 611 of the limiting ring 61, so that the worm 552 can only rotate in the direction of tightening the metal wire 15, thereby reducing the possibility of the metal wire 15 loosening due to accidental rotation of the worm 552 after the metal wire 15 is tightened, which helps to ensure the tensioning effect of the metal wire 15.

[0054] The above are optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A static load fatigue test device for subway obstacle detection parts, characterized in that: include: Mounting seat (1); An installation tool (2) is arranged on the installation seat (1); A power telescopic member (3) is arranged on the installation tool (2); A lever arm tooling (4) is arranged at the movable end of the power telescopic member (3), and an end of the lever arm tooling (4) away from the power telescopic member (3) is used to connect to a stumbling block (9) fixed on the mounting seat (1); A force sensor (10) is connected between the movable end of the power telescopic member (3) and the force arm tooling (4).

2. The static load fatigue test device for subway obstacle detection parts according to claim 1, characterized in that: The force arm tooling (4) comprises a connecting frame (41) and a mounting block (42), wherein the connecting frame (41) is connected to the force sensor (10), and the mounting block (42) is arranged on a side of the connecting frame (41) away from the force sensor (10), and two mounting blocks (42) are provided and arranged at intervals, and a mounting groove (8) for loading the obstacle remover (9) is provided on a side where the mounting block (42) and the connecting frame (41) are close to each other, and an inner wall of the mounting groove (8) can be tightly pressed against the obstacle remover (9), and the mounting block (42) and the connecting frame (41) are detachably connected.

3. The static load fatigue test device for subway obstacle detection parts according to claim 2, characterized in that: A flexible pad for abutting against the obstacle remover (9) is provided on the inner wall of the mounting groove (8).

4. The static load fatigue test device for subway obstacle detection parts according to claim 1, characterized in that: A positioning plate (11) is fixedly arranged on the mounting seat (1), and one end of the power telescopic member (3) away from the mounting tool (2) is fixedly connected to the positioning plate (11).

5. The static load fatigue test device for subway obstacle detection parts according to claim 1, characterized in that: A universal joint assembly (12) is connected between the output end of the power telescopic member (3) and the force sensor (10), and a rounded corner is provided at the connection between the universal joint assembly (12) and the force sensor (10).

6. The static load fatigue test device for subway obstacle detection parts according to claim 2, characterized in that: The connecting frame (41) is provided with a threaded hole, the mounting block (42) is provided with a mounting hole (421) coaxially arranged with the threaded hole, a locking bolt (14) is passed through both the threaded hole and the mounting hole (421), a through hole (141) is formed at the head of the locking bolt (14), a metal wire (15) is passed through the through holes (141) on the locking bolts (14) on the two mounting blocks (42), and a tensioning mechanism (5) for tensioning the metal wire (15) is provided on the connecting frame (41).

7. The static load fatigue test device for subway obstacle detection parts according to claim 6, characterized in that: The tensioning mechanism (5) comprises a first rotating column (51), a second rotating column (52), a driving gear (53), a driven gear (54) and a driving assembly (55); the first rotating column (51) and the second rotating column (52) are both rotatably arranged on a connecting frame (41); the first rotating column (51) and the second rotating column (52) are arranged in parallel; one end of the metal wire (15) is fixedly connected to the first rotating column (51); the second rotating column (52) is provided with a first rope hole (521) ), the other end of the metal wire (15) passes through the first rope hole (521) and is fixedly connected to the second rotating column (52), the driving gear (53) is coaxially fixedly connected to the second rotating column (52), the driven gear (54) is coaxially fixedly connected to the first rotating column (51), the driving gear (53) and the driven gear (54) are meshed, and the driving assembly (55) is arranged on the connecting frame (41), and the driving assembly (55) is used to drive the second rotating column (52) to rotate.

8. The static load fatigue test device for subway obstacle detection parts according to claim 7, characterized in that: The driving assembly (55) comprises a worm wheel (551) and a worm (552); the worm wheel (551) and the second rotating column (52) are coaxially fixedly connected; the worm (552) is rotatably arranged on the connecting frame (41); and the worm (552) and the worm wheel (551) are meshed.

9. The static load fatigue test device for subway obstacle detection parts according to claim 8, characterized in that: The worm (552) is provided with a second rope hole (5521), and one end of the metal wire (15) that passes through the first rope hole (521) passes through the second rope hole (5521) and is fixedly connected to the worm (552).

10. The static load fatigue test device for subway obstacle detection parts according to claim 8, characterized in that: An anti-rotation mechanism (6) is provided between the worm (552) and the connecting frame (41), the anti-rotation mechanism (6) comprising a limiting ring (61), a ratchet (62) and an elastic member, the limiting ring (61) being fixedly connected to the connecting frame (41), the limiting ring (61) being coaxially sleeved on the outside of the worm (552), a plurality of slots (611) adapted to the ratchet (62) being provided on the inner wall of the limiting ring (61), the ratchet (62) being rotatably provided on the worm (552), the elastic member being connected between the ratchet (62) and the worm (552), the elastic member causing the ratchet (62) to press against the inner wall of the slot (611), so that the worm (552) can only rotate in one direction and tighten the metal wire (15).

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