Transverse secondary impact prevention device

Abstract

The utility model relates to the technical field of impact test devices, in particular to a transverse secondary impact prevention device, which comprises a test bed used for carrying out a transverse impact test, and further comprises a drop hammer used for vertically falling, a commutator, a support and an impact column arranged between the commutator and the test bed along the transverse direction. The impact column is installed on the support through a fixing component, and the fixing component can relieve fixation of the impact column when the impact column is subjected to transverse impact. The reverser is arranged below the drop hammer and used for bearing vertical impact force generated when the drop hammer falls and converting the vertical impact force into transverse impact force on the impact column; according to the utility model, the impact column does not carry out secondary impact on the test bench, thereby avoiding the influence of secondary impact on the response of the test piece, and being beneficial to the acquisition and identification of real data.

Description

Technical Field

[0001] The utility model relates to the technical field of impact test devices, and particularly relates to a lateral secondary impact prevention device. Background Art

[0002] At present, most impact test systems can only achieve longitudinal impact conditions for small-load and small-volume specimens, while for lateral impact conditions, a pendulum scheme is adopted, that is, a pendulum is suspended by a rope or a connecting rod to make a pendulum movement, so that the pendulum laterally impacts the test bench to achieve an impact test.

[0003] For this impact test scheme using a pendulum, its disadvantages are as follows. If the pendulum is suspended by a connecting rod, since the connecting rod is rigid, when performing a large-load lateral impact condition, when the pendulum impacts the test bench, the connecting rod is prone to breakage; and if the pendulum is suspended by a rope, since the rope is flexible, the degree of freedom is relatively high, and it is difficult to control the impact point where the pendulum impacts the test bench during the test.

[0004] In addition, for this pendulum scheme, there will also be a problem that the pendulum rebounds after impacting the test bench, and then causes a secondary impact on the test bench. Therefore, it still needs to be improved. Content of the Utility Model

[0005] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a lateral secondary impact prevention device.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lateral secondary impact prevention device includes a test bench for performing a lateral impact test, and further includes a drop hammer for vertical free fall, a commutator, a support, and an impact column. The impact column is arranged horizontally between the commutator and the test bench, and the impact column is installed on the support through a fixing member, wherein the fixing member can release the fixation of the impact column when the impact column is laterally impacted; the commutator is arranged below the drop hammer for bearing the vertical impact force when the drop hammer free falls, and converting the vertical impact force into a lateral impact force on the impact column.

[0008] As an optional implementation manner of the utility model, the fixing member is a fixing pin, and the fixing pin penetrates through the impact column and the support at the same time.

[0009] As an optional implementation manner of the utility model, the support has an inverted U-shaped structure, the impact column horizontally penetrates through the support, and the fixing pin penetrates through the support and the impact column in a direction perpendicular to the axial direction of the impact column.

[0010] As an alternative embodiment of the present utility model, the commutator includes a mounting base and a rotating member rotatably disposed on the mounting base, and the rotation axis of the rotating member is perpendicular to the transverse direction; the rotating member includes a first arm and a second arm connected at one end, the first arm is located below the drop hammer for receiving the drop hammer, and the second arm faces the end of the impact column away from the test bench.

[0011] As an alternative embodiment of the present utility model, the device further includes a guiding assembly for guiding the pendulum hammer and guiding the pendulum hammer to move vertically.

[0012] As an alternative embodiment of the present utility model, the guiding assembly is a vertically arranged linear guide.

[0013] As an alternative embodiment of the present utility model, the device further includes an anti-impact base, and the anti-impact base includes a limiting surface for vertically limiting the first arm, and the limiting surface is disposed below the first arm and is spaced from the first arm by a certain distance in the vertical direction.

[0014] As an alternative embodiment of the present utility model, the rotating member further includes a reinforcing rib disposed between the first arm and the second arm.

[0015] As an alternative embodiment of the present utility model, an avoidance opening for avoiding the reinforcing rib when the rotating member flips is formed on the anti-impact base at a position corresponding to the reinforcing rib.

[0016] As an alternative embodiment of the present utility model, the test bench includes a bench body and a spring assembly disposed at the bottom of the bench body.

[0017] Compared with the prior art, the advantages of adopting this solution are as follows:

[0018] First of all, in this solution, by setting the commutator and the impact column, the vertical free-fall impact of the drop hammer can be converted into a transverse impact of the impact column for a transverse impact test. Compared with the traditional method of using a pendulum hammer for a transverse impact test, there will be no problem of the connecting rod for suspending and pulling the pendulum hammer breaking or the impact point being difficult to control due to the flexibility of the rope.

[0019] Secondly, in this solution, since the impact column is installed on the support through a fixing member, and the fixing member can release the locking of the impact column when the impact column is laterally impacted. Thus, after the drop hammer vertically drops, the commutator will generate a lateral impact force on the impact column, causing the fixing member to release the locking, and the impact column will laterally impact the test bench. Since there is no longer the locking of the fixing member at this time, the impact column will fall off after completing the impact. In this way, it is possible to avoid the secondary impact on the impact column caused by the vertical bounce of the drop hammer on the commutator, and further prevent the impact column from making a secondary impact on the test bench, avoiding the influence of the secondary impact on the response of the specimen, which is beneficial to the acquisition and identification of real data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a cross-sectional view of the present utility model;

[0022] Figure 3 is a partial structural schematic diagram of the commutator position of the present utility model;

[0023] Figure 4 is Figure 3 partial sectional view of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present utility model.

[0025] In the following description, terms such as "inner", "outer", "upper", "lower", "left", "right", etc., indicating directions or positional relationships are only for the convenience of describing the embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus cannot be construed as a limitation of the present utility model.

[0026] Please refer to Figures 1-4 shown. This embodiment provides a lateral anti-secondary impact device, which includes a test bench 1 for performing lateral impact tests, and also includes a drop hammer 2, a commutator 4, a support 5, and an impact column 6.

[0027] For the test bench 1 for lateral impact, it mainly includes a bench body 11, a base 12, and a spring assembly 13 between the bench body 11 and the base 12, with the spring assembly 13 distributed sequentially along the circumferential direction of the bench body; there are many applications and descriptions of such a test bench 1 in existing lateral impact tests, so no more details will be elaborated here.

[0028] The drop hammer 2 is used for vertical free fall, that is, during the test, the drop hammer 2 is lifted to a certain height by a releasable suspension device and then released. The drop hammer 2 can then fall vertically under its own weight and perform a movement similar to free fall to impact the commutator 4.

[0029] The impact column 6 is mainly used for conducting impact tests along the lateral direction of the test bench 1 (mainly hitting the lateral impact position of the bench body 11); the axis of the impact column 6 is set horizontally, and the impact column 6 is horizontally arranged between the commutator 4 and the test bench 1.

[0030] The commutator 4 is arranged below the drop hammer 2 to bear the vertical impact force when the drop hammer 2 falls and convert this vertical impact force into a lateral impact force on the impact column 6.

[0031] In addition, the impact column 6 is installed on the support 5 through a fixing member, where the fixing member can release the fixation of the impact column 6 when the impact column 6 is laterally impacted. Here, the release of fixation can be understood as that the fixing member no longer fixes the impact column 6 on the support 5.

[0032] During the impact test, first, the drop hammer 2 is lifted to a certain height and then released. The drop hammer 2 will fall downward and vertically impact the commutator 4. After the commutator 4 receives the vertical impact force from the drop hammer 2, it will convert it into a lateral impact force on the impact column 6. Furthermore, after the impact column 6 receives the lateral impact force from the commutator 4, under the action of this lateral impact force, the impact column 6 will generate an impact force on the fixing member, causing the fixing member to release the fixation of the impact column 6, and then enabling the impact column 6 to laterally impact the test bench 1 to achieve a lateral impact test.

[0033] Since the impact column 6 has no locking by the fixing member after completing a lateral impact test, the impact column 6 will fall off after the impact. In this way, it is possible to avoid the secondary impact on the impact column 6 caused by the vertical bounce of the drop hammer 2 on the commutator 4. Furthermore, the impact column 6 will not perform a secondary impact on the test bench 1, avoiding the influence of the secondary impact on the response of the specimen and being conducive to the acquisition and identification of real data.

[0034] In other words, assuming that the impact post 6 does not fall after one impact, when the drop hammer 2 hits the commutator 4, it will bounce upward and then fall onto the commutator 4 again. In this way, the commutator 4 will be subjected to a secondary vertical impact, and thus the commutator 4 will exert a secondary lateral impact on the impact post 6, causing the impact post 6 to exert a secondary lateral impact on the test bench 1, which is not conducive to the acquisition and identification of real data.

[0035] In this embodiment, the fixing member is preferably a fixing pin 8. The fixing pin 8 is a disposable pin shaft, and the fixing pin 8 passes through the impact post 6 and the support 5 at the same time. In this way, after the impact post 6 is subjected to the lateral impact force of the commutator 4, the fixing pin 8 will break and fail, thus releasing the fixation of the impact post 6.

[0036] In addition, as Figure 3 shown, the support 5 has an inverted U-shaped structure and is fixed on a support base 51. The impact post 6 passes through the support 5 horizontally, and the fixing pin 8 passes through the support 5 and the impact post 6 in a direction perpendicular to the axial direction of the impact post 6; that is, the fixing pin 8 passes through the middle of the impact post 6, and then the two ends are respectively passed through the side walls on both sides of the inverted U-shaped support 5; the inverted U-shaped support 5 can ensure that the impact post 6 can fall in the U-shaped space of the support 5.

[0037] The fixing pin 8 can be one or more. For example, in this embodiment, the case of using two fixing pins 8 is shown, and the two fixing pins 8 are arranged side by side horizontally.

[0038] In this embodiment, the commutator 4 includes a mounting base 41 and a rotating member rotatably provided on the mounting base 41. The rotation axis of the rotating member is perpendicular to the horizontal direction. Here, perpendicular to the horizontal direction specifically means perpendicular to the horizontal direction in the horizontal plane.

[0039] As Figure 4 shown, the rotating member includes a first arm 421 and a second arm 422. One end of the first arm 421 and the second arm 422 are connected to form an L-shaped structure; preferably, the first arm 421 and the second arm 422 are of an integral structure.

[0040] As Figure 1 and Figure 2 shown, the first arm 421 is located below the drop hammer 2 for receiving the drop hammer 2, and the second arm 422 faces the end of the impact post 6 away from the test bench 1.

[0041] Thus, during the test, the drop hammer 2 drops onto the first arm 421, causing the first arm 421 to flip downward. As a result, the second arm 422 will flip upward, and then the second arm 422 will impact the impact column 6 towards the test bench 1 side, causing the impact column 6 to laterally impact the test bench 1. In this way, the purpose of using the commutator 4 to convert the vertical impact force of the drop hammer 2 into the lateral impact force on the impact column 6 is achieved.

[0042] In addition, in order to guide the drop hammer 2 to drop only vertically, this embodiment further includes a guiding component for guiding the pendulum hammer and guiding it to move vertically. Among them, the guiding component can adopt a vertically arranged linear guide 3.

[0043] Specifically, as Figure 1 shown, two sets of linear guides 3 are provided, respectively arranged on both sides of the drop hammer 2. Each set of linear guides 3 includes a vertically arranged track 31 and a sliding seat 32 slidably arranged vertically on the track 31. A counterweight 33 is fixed on the sliding seat 32, and the drop hammer 2 is fixed between the two counterweights 33.

[0044] In order to facilitate lifting the drop hammer 2, a lifting lug 34 is provided on the counterweight 33 or the drop hammer 2 in this embodiment.

[0045] Since the first arm 421 will flip downward when impacted by the drop hammer 2 (from the perspective shown, it can be understood as flipping clockwise), if the maximum flipping position of the first arm 421 along the clockwise direction is not limited, after the impact column 6 completes the impact and drops, the first arm 421 will continue to flip clockwise and will not support the drop hammer 2, resulting in the drop hammer 2 falling from the first arm 421 and hitting the ground. Figure 1 As shown, this embodiment further includes an anti - impact base 7. The anti - impact base 7 includes a limiting surface for vertically limiting the first arm 421. For example, the top surface of the anti - impact base 7 constitutes the limiting surface. Here, vertically limiting the first arm 421 can also be understood as restricting the maximum position that the first arm 421 can reach along the clockwise flip.

[0046] To overcome the above problems, as Figure 2 and Figure 4 shown, this embodiment further includes an anti - impact base 7. The anti - impact base 7 includes a limiting surface for vertically limiting the first arm 421. For example, the top surface of the anti - impact base 7 constitutes the limiting surface. Here, vertically limiting the first arm 421 can also be understood as restricting the maximum position that the first arm 421 can reach along the clockwise flip.

[0047] The limiting surface is arranged below the first arm 421 and is vertically spaced from the first arm 421 by a certain distance. This distance should be at least greater than the space required for the rotating part to rotate during the impact process. In this way, it will not affect the impact process.

[0048] In this way, after the first arm 421 is impacted by the drop hammer 2, it rotates clockwise and is finally blocked by the limiting surface of the anti-impact base 7, so that it cannot continue to rotate clockwise. It is equivalent to using the anti-impact base 7 to support the first arm 421. In this way, the first arm 421 can support the drop hammer 2 to prevent the drop hammer 2 from falling to the ground.

[0049] In addition, in this embodiment, in order to improve the structural strength between the first arm 421 and the second arm 422, the rotating member further includes a reinforcing rib 423, and the reinforcing rib 423 is arranged between the first arm 421 and the second arm 422.

[0050] In order to avoid the presence of the reinforcing rib 423 from hindering the rotation of the rotating member during the test, in this embodiment, as Figure 4 shown, an avoidance opening 71 for avoiding the reinforcing rib 423 during the rotation of the rotating member is formed in the anti-impact base 7 at a position corresponding to the reinforcing rib 423. That is, when the rotating member rotates, the reinforcing rib 423 can move in the avoidance opening 71 and will not be blocked by the anti-impact base 7, ensuring the normal rotation of the entire rotating member.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. A lateral secondary impact protection device, comprising a test bench for conducting a lateral impact test, characterized in that: It also includes a drop hammer, a commutator, a support and an impact column for vertical falling objects, wherein the impact column is arranged laterally between the commutator and the test bench, and the impact column is installed on the support through a fixing component, wherein the fixing component can release the fixation of the impact column when the impact column is subjected to a lateral impact; the commutator is arranged below the drop hammer to withstand the vertical impact force when the drop hammer falls, and convert the vertical impact force into a lateral impact force on the impact column.

2. A lateral secondary impact protection device according to claim 1, characterized in that: The fixing component is a fixing pin, and the fixing pin is simultaneously passed through the impact column and the support.

3. A lateral secondary impact protection device according to claim 2, characterized in that: The support is in an inverted U-shaped structure, the impact column is transversely arranged in the support, and the fixing pin is arranged on the support and the impact column in a direction perpendicular to the axial direction of the impact column.

4. The lateral secondary impact protection device according to claim 1, characterized in that: The commutator includes a mounting seat and a rotating member rotatably arranged on the mounting seat, and the rotation axis of the rotating member is perpendicular to the horizontal direction; the rotating member includes a first arm and a second arm connected at one end, the first arm is located below the drop hammer for receiving the drop hammer, and the second arm faces the end of the impact column away from the test bench.

5. The lateral secondary impact protection device according to claim 4, characterized in that: The device also includes a guide assembly, which is used to guide the pendulum to move vertically.

6. A lateral secondary impact protection device according to claim 5, characterized in that: The guide assembly is a linear rail arranged vertically.

7. A lateral secondary impact protection device according to claim 5 or 6, characterized in that: The device also includes an anti-collision base, which includes a limiting surface for vertically limiting the first support arm. The limiting surface is arranged below the first support arm and is vertically spaced a distance from the first support arm.

8. The lateral secondary impact protection device according to claim 7, characterized in that: The rotating member further comprises a reinforcing rib, and the reinforcing rib is arranged between the first supporting arm and the second supporting arm.

9. The lateral secondary impact protection device according to claim 8, characterized in that: The anti-collision base is provided with an escape opening corresponding to the reinforcing rib position for avoiding the reinforcing rib when the rotating part turns over.

10. The lateral secondary impact protection device according to claim 7, characterized in that: The test bench comprises a bench body and a spring assembly arranged at the bottom of the bench body.

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