Inertial drive self-weight type impact body limiting device

Abstract

This invention belongs to the field of engineering structure testing technology, and specifically relates to an inertial-driven self-weight impact body limiting device, including a support plate with a through hole at its center for a limiting mechanism to pass through. The limiting mechanism includes a bottom ring, on the upper surface of which multiple pairs of upright plates are uniformly fixed in a circumferential direction. An intermediate plate is fixed between the pairs of upright plates, and a locking component is provided at the lower part of the intermediate plate. The locking component includes a gravity trigger block, and an electrically controlled lifting device is provided above the gravity trigger block. A baffle is provided on the upper outer side of each pair of upright plates. This invention uses the inertia of the gravity trigger block to drive the mechanical locking component, and combined with height-adjustable baffles, proposes a structurally reasonable and reliable dual-protection limiting device. It also features an electrically controlled reset structure, enabling convenient reset and stable reuse of the device.

Description

Technical Field

[0001] This invention belongs to the field of engineering structure testing technology, and specifically relates to an inertial-driven self-weight impact body limiting device. Background Technology

[0002] Impact testing is a commonly used test method for evaluating the impact resistance of components. It involves lifting an impactor of a certain weight to a preset height and applying the impact load generated by the free fall of the impactor to the specimen, thereby simulating the unexpected impact that the component may experience in actual service or under extreme conditions, and thus obtaining key data such as the damage characteristics, deformation response and impact resistance of the specimen.

[0003] In the actual conduct of impact tests on engineering structures, after the impactor delivers its initial impact to the specimen, the specimen's elastic restoring force causes a rebound. The rebounding impactor, under its own weight, falls again, resulting in a secondary impact. This secondary impact severely interferes with the accurate acquisition and subsequent analysis of test data, making it impossible to accurately assess the specimen's true impact resistance and reducing the reliability of engineering design methods derived from test data. More importantly, it further exacerbates the damage to the specimen, leading to complex and unpredictable failure modes within the specimen. This significantly deviates from the actual engineering scenario where components typically withstand only a single, sudden impact, severely weakening the engineering reference value of the impact test results. Furthermore, the trajectory and speed of the rebounding impactor are difficult to control precisely. Its disordered movement may cause additional damage to the main body of the test device, adversely affecting the safe operation of the test equipment and increasing safety hazards during the test. In response to the series of problems caused by the rebounding impactor, the most common existing technology is to set up mechanical limiting structures such as pop-out support legs. However, after verification by actual engineering applications, it has been found that such devices have delayed trigger response, insufficient reliability, and cannot effectively suppress the rebound of the impactor. They are difficult to adapt to the performance requirements of the limiting device for high-precision impact tests, and have defects such as cumbersome reset operation after triggering and insufficient convenience for repeated use. Summary of the Invention

[0004] The present invention provides an inertial-driven, self-weight-based impact body limiting device to address the above-mentioned problems.

[0005] To achieve the above objectives, the present invention employs the following technical solution: An inertial-driven, self-weight-based impactor limiting device includes a support plate with a through hole at its center. The through hole allows a limiting mechanism to pass through. The limiting mechanism includes a bottom ring with an impactor mounted on its lower surface. Multiple pairs of upright plates are circumferentially and evenly fixed on the upper surface of the bottom ring. An intermediate plate is fixed between the pairs of upright plates. A through hole is formed in the lower part of the intermediate plate. A locking member, including a gravity trigger block, is located behind the through hole. A horizontal through hole is formed within the gravity trigger block, and a pre-compressed spring is installed within the through hole. The diameter of the through hole is smaller than the diameter of the through hole. A cover plate is provided on the side of the trigger block away from the middle plate. The cover plate is fixedly connected to the pair of upright plates. A base plate is provided below the gravity trigger block. The base plate is fixedly positioned between the pair of upright plates. An electrically controlled lifting device is provided above the gravity trigger block. The electrically controlled lifting device is fixedly positioned between the pair of upright plates and is used to lift the gravity trigger block. A pusher is fixedly provided on the front side of the through hole. A slide rail is provided in the pusher, which is connected to the through hole. A ball bearing is slidably arranged in the slide rail. The end of the ball bearing contacts the inner surface of the movable support leg. The upper end of the movable support leg is rotatably connected between the pair of upright plates by a pin. A baffle is provided on the upper outer side of each pair of upright plates.

[0006] Furthermore, four sets of the paired uprights are evenly arranged circumferentially.

[0007] Furthermore, a lifting ring is fixedly installed at the upper end of the gravity trigger block.

[0008] Furthermore, the electrically controlled lifting device is equipped with a chain, and the end of the chain is equipped with a hook, which is connected to a lifting ring.

[0009] Furthermore, a limit block is provided above the gravity trigger block, and the limit block is fixedly mounted on the middle plate.

[0010] Furthermore, the upper part of the upright plate has multiple mounting holes at equal intervals along the height direction. Two adjacent mounting holes are fixed to the baffle by bolts. The baffle can be adapted to the limiting requirements of different tests by installing mounting holes at different heights.

[0011] Furthermore, a positioning block is provided on the intermediate plate, which is used to limit the rotation angle of the movable support leg.

[0012] Furthermore, the through hole and the through hole of the gravity trigger block are arranged in a staggered manner in the initial state, and the gravity trigger block is limited and fixed by the static friction between itself and the intermediate plate and the cover plate and the compression force of the spring.

[0013] Furthermore, the diameter of the circle containing the outer edge of the upright plate is the same as the diameter of the bottom ring.

[0014] Furthermore, the bottom ring is provided with multiple threaded holes evenly distributed around its circumference and is connected to the impact body by bolts.

[0015] Compared with the prior art, the present invention has the following advantages: This invention utilizes the inertia of a gravity-triggered block to trigger a pre-compressed spring, causing it to quickly spring into the slide and resist the end of the ball bearing. This, in turn, pushes the movable support leg to rotate outward around the pin axis. Simultaneously, a positioning block limits the rotation angle of the movable support leg, ensuring precise locking with the support plate and achieving reliable limiting. This locking component has a reasonable structure and is easy to operate. Combined with an adjustable height baffle installed on the upright plate, this invention can not only adapt to the limiting requirements of different tests, but also provide secondary protection when the movable support leg cannot pop out, without interfering with normal impact, preventing the impactor from falling out of control and causing safety hazards, thus forming a dual protection system.

[0016] This invention uses an electrically controlled lifting device to lift the gravity trigger block, which not only allows for quick and convenient reset of the device, but also significantly improves the ease of reuse. In addition, combined with the limiting block above the gravity trigger block, the reset lifting stroke of the gravity trigger block can be precisely limited, further improving the operational stability and reliability of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the limiting mechanism of the present invention; Figure 5 This is a schematic diagram of the limiting mechanism of the present invention; Figure 6 This is a schematic diagram of the limiting mechanism of the present invention; Figure 7 This is a cross-sectional schematic diagram of the limiting mechanism of the present invention; Figure 8 This is a schematic diagram of the falling process of the limiting mechanism of the present invention; Figure 9 This is a schematic diagram illustrating the triggering of the movable support leg limit of the present invention; Figure 10 This is a schematic diagram illustrating the triggering of the baffle limiting mechanism of the present invention.

[0018] In the diagram, 1 is the support plate, 2 is the support plate through hole, 3 is the bottom ring, 301 is the threaded hole, 4 is the upright plate, 401 is the mounting hole, 5 is the intermediate plate, 6 is the through hole, 7 is the locking component, 701 is the gravity trigger block, 701 is the through hole, 7012 is the spring, 7013 is the lifting ring, 702 is the cover plate, 703 is the base plate, 704 is the electric lifting device, 7041 is the hook, 705 is the jacking component, 7051 is the slide rail, 7052 is the ball bearing, 706 is the movable support leg, 707 is the pin, 708 is the limit block, 709 is the positioning block, and 8 is the baffle. Detailed Implementation

[0019] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments.

[0020] like Figures 1 to 10As shown, an inertial-driven self-weight impact body limiting device includes a support plate 1, which is fixedly installed above the test specimen. A through hole 2 is provided at the center of the support plate 1 for a limiting mechanism to pass through. The limiting mechanism includes a bottom ring 3, which has multiple threaded holes 301 evenly distributed around its circumference and is connected to the impact body by bolts. Four pairs of upright plates 4 are evenly fixedly arranged around the upper surface of the bottom ring 3. The diameter of the outer edge of each upright plate 4 is the same as the diameter of the bottom ring 3. To improve the structural rigidity, an intermediate plate 5 is fixedly arranged between the pairs of upright plates 4. A through hole 6 is provided at the bottom of the intermediate plate 5, and a locking member 7 is provided at the bottom of the intermediate plate 5. The locking component 7 includes a gravity trigger block 701, which is disposed behind the through hole 6. A horizontal through hole 7011 is formed within the gravity trigger block 701, and a pre-compressed spring 7012 is disposed within the through hole 7011. The diameter of the through hole 7011 is smaller than the diameter of the through hole 6. A cover plate 702 is disposed on the side of the gravity trigger block 701 opposite to the intermediate plate 5. The cover plate 702 is fixedly connected to a pair of upright plates 4 and is used to constrain the lateral displacement of the gravity trigger block 701. A base plate 703 is disposed below the gravity trigger block 701 and is fixedly disposed between the pair of upright plates 4. The through hole 7011 of the gravity trigger block 701 and the through hole 6 are initially... In their initial state, they are arranged in a staggered manner, and the gravity trigger block 701 is limited and fixed by the static friction between itself and the intermediate plate 5 and the cover plate 702, as well as the compression force of the spring 7012. A lifting ring 7013 is fixedly installed at the upper end of the gravity trigger block 701, and an electrically controlled lifting device 704 is installed above the gravity trigger block 701. The electrically controlled lifting device 704 is fixedly installed between the paired upright plates 4. The electrically controlled lifting device 704 is used to lift the gravity trigger block 701. A chain is installed on the electrically controlled lifting device 704, and a hook 7041 is installed at the end of the chain. The hook 7041 is connected to the lifting ring 7013. A limit block 708 is installed above the gravity trigger block 701. A limiting block 708 is fixedly mounted on the intermediate plate 5. The limiting block 708 is used to limit the upward displacement stroke of the gravity trigger block 701. A pushing member 705 is fixedly mounted on the front side of the through hole 6. A slide rail 7051 is opened in the pushing member 705. The slide rail 7051 is connected to the through hole 6. A sliding ball 7052 is slidably mounted in the slide rail 7051. The sliding ball 7052 can move axially along the slide rail 7051. The end of the sliding ball 7052 is in contact with the inner surface of the movable support leg 706. The upper end of the movable support leg 706 is rotatably connected between the paired upright plates 4 through a pin 707. A positioning block 709 is provided on the intermediate plate 5. The positioning block 709 is used to limit the rotation angle of the movable support leg 706.To ensure its lower part can be stably secured to the upper surface of the support plate 1 for reliable positioning, in the initial state, the outer surface of the movable support leg 706 is flush with the outer surface of the upright plate 4 to avoid interference when passing through the support plate 1. The upper part of the upright plate 4 has multiple mounting holes 401 evenly spaced along its height. Adjacent mounting holes 401 are fixed to the baffle 8 with bolts. The baffle 8, by being installed in mounting holes 401 at different heights, can adapt to the positioning requirements of different tests.

[0021] Triggering process: In its initial state, the gravity trigger block 701 is temporarily fixed by the friction between itself and the intermediate plate 5 and the cover plate 702, as well as the compressive force of the spring 7012. The through hole 6 inside the gravity trigger block 701 is misaligned with the through hole 6 of the intermediate plate 5, and the outer surface of the movable support leg 706 is flush with the outer surface of the upright plate 4 to avoid interference when passing through the support plate 1. In use, the limiting mechanism is integrated with the impact body and falls freely with the impact body through the support plate through hole 6 of the support plate 1. After the impact body completes its first impact on the specimen, if the specimen has elastic recovery ability and pushes the impact body to rebound upward, the gravity trigger block 701 moves downward due to inertia, overcoming the friction and the compressive force of the spring 7012, until its internal through hole 6 is precisely aligned with the through hole 6 of the intermediate plate 5. At this time, the compressed spring 7012 is released. The spring 7012 is limited and quickly ejected, then ejected into the slide rail 7051 through the through hole 6 of the middle plate 5, pushing the sliding ball 7052 in the slide rail 7051 to move outward. The sliding ball 7052 simultaneously pushes the movable support leg 706 to rotate outward around the pin 707. The movable support leg 706 is limited and constrained by the positioning block 709. The lower structure of the movable support leg 706 is stably locked on the support plate 1. The locking component 7 prevents the impact body assembly from falling again, avoiding secondary impact. If the specimen breaks after being impacted or the gravity trigger block 701 moves downward insufficiently, the spring 7012 cannot eject. The movable support leg 706 lacks the elastic force of the spring 7012 and cannot unfold. The limiting mechanism falls directly with the impact body assembly. At this time, the height-adjustable baffle 8 on the upright plate 4 forms an effective limit, realizing secondary protection and preventing the impact body assembly from going out of control and causing safety hazards.

[0022] Reset process: After the device completes the limit locking test, the popped-out movable support leg 706 can be manually pushed back to its initial non-popped state, that is, the outer surface of the movable support leg 706 is flush with the outer surface of the upright plate 4, and the other end of the sliding ball 7052 is flush with the rear surface of the intermediate plate 5. Then, the hook 7041 at the end of the chain of the electric lifting device 704 is connected to the corresponding hanging ring 7013 at the upper end of the gravity trigger block 701. The electric lifting device 704 is started to rewind the chain, driving the gravity trigger block 701 to move upward and reset. When the gravity trigger block 701 moves to the preset height using the limit block 708, the lifting stops to avoid the problem of the spring 7012 popping out of the device and the gravity trigger block 701 falling too far and failing to trigger in time due to excessive lifting height. The overall reset of the device is completed, and it can be quickly put into use for the next test.

[0023] The foregoing has shown and described the main features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An inertial-driven, self-weight-based impact body limiting device, characterized in that, The device includes a support plate (1), with a through hole (2) at the center of the support plate (1). The through hole (2) is used to pass through a limiting mechanism. The limiting mechanism includes a bottom ring (3). An impact body is installed on the lower surface of the bottom ring (3). Multiple pairs of upright plates (4) are evenly fixed on the upper surface of the bottom ring (3). An intermediate plate (5) is fixed between the pairs of upright plates (4). A through hole (6) is opened at the lower part of the intermediate plate (5). A locking component (7) is provided, the locking component (7) including a gravity trigger block (701), the gravity trigger block (701) is located on the rear side of the through hole (6), the gravity trigger block (701) has a horizontal through hole (7011) inside the gravity trigger block (7011), a pre-compressed spring (7012) is provided in the through hole (7011), the diameter of the through hole (7011) is smaller than the diameter of the through hole (6), a cover plate (702) is provided on the side of the gravity trigger block (701) away from the middle plate (5), the cover plate (702) is provided on the side of the gravity trigger block (701) away from the middle plate (5), the cover plate (702) is provided on the side of the gravity trigger block (701) away from the middle plate (5) The plate (702) is fixedly connected to the pair of upright plates (4). A base plate (703) is provided below the gravity trigger block (701). The base plate (703) is fixedly arranged between the pair of upright plates (4). An electrically controlled lifting device (704) is provided above the gravity trigger block (701). The electrically controlled lifting device (704) is fixedly arranged between the pair of upright plates (4). The electrically controlled lifting device (704) is used to lift the gravity trigger block (701). The front side of the through hole (6) is fixedly provided with There is a pusher component (705), and a slide (7051) is provided in the pusher component (705). The slide (7051) is connected to the through hole (6). A ball bearing (7052) is slidably arranged in the slide (7051). The end of the ball bearing (7052) is in contact with the inner surface of the movable support (706). The upper end of the movable support (706) is rotatably connected between the pair of upright plates (4) through a pin (707). A baffle (8) is provided on the upper outer side of the pair of upright plates (4).

2. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that, The uprights (4) are arranged in pairs in four groups evenly around the circumference.

3. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that, A lifting ring (7013) is fixedly installed at the upper end of the gravity trigger block (701).

4. The inertial-driven self-weight impact body limiting device according to claim 3, characterized in that, The electrically controlled lifting device (704) is equipped with a chain, and the end of the chain is equipped with a hook (7041), which is connected to the lifting ring (7013).

5. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that, A limit block (708) is provided above the gravity trigger block (701), and the limit block (708) is fixedly installed on the intermediate plate (5).

6. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that, The upper part of the upright plate (4) is provided with a plurality of mounting holes (401) at equal intervals along the height direction. Two adjacent mounting holes (401) are fixedly installed to the baffle (8) by bolts. The baffle (8) can be adapted to the limiting requirements of different tests by mounting holes (401) at different heights.

7. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that, A positioning block (709) is provided on the intermediate plate (5), which is used to limit the rotation angle of the movable support leg (706).

8. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that: The through hole (7011) and the through hole (6) of the gravity trigger block (701) are arranged in a staggered manner in the initial state. The gravity trigger block (701) is limited and fixed by the static friction between itself and the intermediate plate (5) and the cover plate (702) and the compression force of the spring (7012).

9. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that, The diameter of the circle containing the outer edge of the upright plate (4) is the same as the diameter of the bottom ring (3).

10. The inertial-driven self-weight impact body limiting device according to claim 1, characterized in that, The bottom ring (3) has multiple threaded holes (301) evenly distributed around its circumference and is connected to the impact body by bolts.

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