Vibration Test Fixture

Abstract

The present invention relates to a vibration test fixture, comprising an adapter plate, a mounting pad, an adjustment assembly and a fastener. The adapter plate is used to be arranged on a vibration table. The mounting pad is arranged on the adapter plate, and the mounting pad is used to fix one of the connecting terminals of a cable assembly. The adjustment assembly is arranged on the adapter plate and is spaced apart from the mounting pad. The adjustment assembly comprises a mounting column, which is rotatably connected to the adapter plate. A first fastening hole is provided on the mounting column, and the mounting column can be rotated until the first fastening hole is opposite to a second fastening hole of another connecting terminal of the cable assembly. The fastener passes through the first fastening hole and the second fastening hole of another connecting terminal of the cable assembly to fix one connecting terminal of the cable assembly on the mounting pad. When the cable assembly is fixed on the vibration test fixture for a vibration test, the crimping joint between the connecting terminal and the cable body is not easy to loosen. It also makes it difficult for the cable assembly to be damaged unnecessarily, thereby ensuring the accuracy of the vibration test results.

Description

Technical Field

[0001] The invention relates to the technical field of vibration testing, in particular to a vibration testing fixture. Background Art

[0002] The vibration test of cable assemblies is a test used to evaluate the vibration resistance of equipment in its expected transportation and use environment, and is an important part of the reliability test of cable assemblies. The cable assembly includes a cable body and connecting terminals crimped on both ends of the cable body. Most cable assemblies are prone to large differences in the crimping angles of the connecting terminals at both ends during the sample preparation process. In order to fix the cable assembly on the adapter plate, the traditional vibration test fixture will directly twist the connecting terminals at both ends until the fastening holes of the connecting terminals are opposite to the fastening holes on the adapter plate, and then forcibly tighten the connecting terminals with bolts. However, in this vibration test fixture, the connecting terminals at both ends of the cable assembly will be subjected to large torsional stress and tensile force, making it very easy for the crimping of the connecting terminals and the cable body to loosen during the vibration test, and even cause problems such as the cable body breaking or the connecting terminals deforming and cracking. Summary of the invention

[0003] Based on this, it is necessary to provide a vibration test fixture so that when the cable assembly is fixed on the vibration test fixture for vibration testing, the crimping joints between the connecting terminals and the cable body are not easy to loosen, and the cable assembly is not easy to be damaged unnecessarily, thereby ensuring the accuracy of the vibration test results.

[0004] A vibration test fixture, comprising:

[0005] An adapter plate, used for being set on a vibration table;

[0006] A mounting pad, disposed on the adapter plate, the mounting pad being used to fix one of the connection terminals of the cable assembly;

[0007] an adjusting assembly, disposed on the adapter plate and spaced apart from the mounting pad, the adjusting assembly comprising a mounting post, the mounting post being rotatably connected to the adapter plate, the mounting post being provided with a first fastening hole, the mounting post being rotatable until the first fastening hole is opposite to a second fastening hole of another connecting terminal of the cable assembly; and

[0008] A fastener passes through the first fastening hole and a second fastening hole of another connecting terminal of the cable assembly to fix one connecting terminal of the cable assembly on the mounting post.

[0009] When the above-mentioned vibration test fixture is used, the adapter plate is first fixed on the vibration table. Then, one connecting terminal of the cable assembly is fixed on the mounting pad, and then the mounting column is rotated so that the first fastening hole of the mounting column is opposite to the second fastening hole of another connecting terminal of the cable assembly in a stress-free state, and then the other connecting terminal is fixed on the mounting column. The vibration test fixture can well fix the connecting terminals of the cable assembly with any degree of crimping angle deviation. There is no need to use external force to twist the connecting terminals at both ends of the cable assembly until the second fastening holes of the connecting terminals are opposite to the first fastening holes on the adapter plate. The cable assembly as a whole is in a naturally stretched state, and the connecting terminals do not need to bear torsional stress and tension. The crimping point between the connecting terminal and the cable body is not easy to loosen. It also makes it difficult for the cable assembly to be damaged unnecessarily, ensuring the accuracy of the vibration test results.

[0010] In one embodiment, the vibration test fixture further includes a first mounting member, the adapter plate is provided with a plurality of first mounting holes, and the first mounting member passes through the first mounting holes to fix the adapter plate on the vibration table.

[0011] In one embodiment, the adjustment assembly also includes a mounting bracket, which includes a first fixing plate and a second fixing plate that are connected to each other and set at an angle, the first fixing plate is set on the adapter plate and spaced apart from the mounting pad, and the mounting column is rotatably set on the second fixing plate.

[0012] In one embodiment, the vibration test fixture also includes an adjustment dial connected to the mounting column, the adjustment dial is arranged on the side of the second fixing plate facing away from the mounting pad, the second fixing plate is provided with a fixing hole, and one end of the mounting column away from the adjustment dial passes through the fixing hole.

[0013] In one embodiment, the adjustment assembly further includes a locking member, the adjustment dial is provided with a locking hole matched with the locking member, the locking member passes through the locking hole and abuts against the second fixing plate.

[0014] In one embodiment, the vibration test fixture further includes a third mounting member, the adapter plate is provided with a plurality of third mounting holes, and the third mounting member is used to pass through the first fixing plate and the third mounting holes to fix the first fixing plate to the adapter plate.

[0015] In one embodiment, there are at least two mounting pads, and at least two mounting pads are stacked.

[0016] In one of the embodiments, the vibration test fixture further includes a fixing component, the fixing component is disposed on the adapter plate, the fixing component is disposed between the mounting pad and the adjustment component, and the fixing component is provided with a through hole for allowing the cable component to pass through.

[0017] In one embodiment, the fixing assembly includes a support pad and a limit block, the support pad is arranged on the adapter plate, the limit block is detachably connected to the support pad, and the through hole is formed between the limit block and the support pad.

[0018] In one embodiment, the vibration test fixture further includes a fourth mounting member, a plurality of fourth mounting holes are provided on the adapter plate, and the fourth mounting member is used to pass through the fixing assembly and the fourth mounting holes to fix the fixing assembly on the adapter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a vibration test fixture according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Top view of the . DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a vibration test fixture 10, including an adapter plate 100, a mounting pad 200, an adjustment assembly and a fastener 440. The vibration test fixture 10 makes it difficult for the crimping joint of the connecting terminal 22 and the cable body 21 to loosen when the cable assembly 20 is subjected to a vibration test. It also makes it difficult for the cable assembly 20 to be damaged unnecessarily, thereby ensuring the accuracy of the vibration test results.

[0025] Specifically, the adapter plate 100 is used to be arranged on a vibration table. In the present embodiment, the adapter plate 100, the mounting pad 200 and the adjustment assembly are all made of aluminum alloy. Aluminum alloy has the advantages of high rigidity and light weight, and is not easily damaged during the vibration test. Moreover, the resonance frequency of the adapter plate 100, the mounting pad 200 and the adjustment assembly made of aluminum alloy is relatively high, and it is not easy to resonate with the cable assembly 20 or the vibration equipment on the vibration table during the vibration test, which can greatly reduce the test error. Of course, in other embodiments, the adapter plate 100 can also be made of magnesium alloy, stainless steel or other materials.

[0026] Furthermore, the vibration test fixture 10 also includes a first mounting member, and a plurality of first mounting holes 110 are provided on the adapter plate 100, and the plurality of first mounting holes 110 are arranged in an array, and the first mounting member passes through the first mounting holes 110 to fix the adapter plate 100 on the vibration table. This arrangement facilitates the adapter plate 100 to be installed on the vibration table at different installation angles, and can implement vibration tests of the cable assembly 20 in multiple directions and multiple dimensions. Optionally, the first mounting member is a countersunk screw, and the first mounting hole 110 is a countersunk screw hole that matches the countersunk screw. In other embodiments, the first mounting member may also be a bolt, a rivet, or a pin, etc.

[0027] For example, the adapter plate 100 with the cable assembly 20 fixed thereon is first mounted on a vibration table (not shown in the drawings) by means of a first mounting member, and the vibration direction of the vibration table is aligned with the X-axis direction of the cable assembly 20 (corresponding to Figure 1 After the X-axis vibration test of the cable assembly 20 is completed, the first mounting member is first loosened, the adapter plate 100 is rotated 90°, and the adapter plate 100 is mounted on the vibration table again through the first mounting member. The cable assembly 20 is subjected to the Y-axis vibration test (corresponding to Figure 1 After the vibration test of the cable assembly 20 in the Y-axis direction is completed, the main vibration direction of the vibration table can be adjusted to be parallel to the Z-axis direction of the cable assembly 20, and the cable assembly 20 can be subjected to a vibration test in the Z-axis direction.

[0028] Specifically, the mounting pad 200 is arranged on the adapter plate 100, and the mounting pad 200 is used to fix one of the connection terminals 22 of the cable assembly 20. Optionally, there are at least two mounting pads 200, and at least two mounting pads 200 are stacked. This arrangement facilitates the adjustment of the height of the mounting pad 200 according to the model of the cable assembly 20, so that different models of cable assemblies 20 can be in a naturally stretched and unbent state when fixed on the adapter plate 100, so that the cable assembly 20 is not easily damaged, reducing unnecessary measurement errors.

[0029] Specifically, the vibration test fixture 10 further includes a second mounting member 421, and the adapter plate 100 is provided with a plurality of second mounting holes, which are arranged in an array. The second mounting member 421 is used to pass through the mounting pad 200 and the second mounting hole to fix the mounting pad 200 on the adapter plate 100. Optionally, the second mounting member 421 is a bolt, and the second mounting hole is a threaded hole matched with the bolt. Of course, in other embodiments, the second mounting member 421 may also be a screw, a rivet, a pin or other mounting member.

[0030] Further, the vibration test fixture 10 also includes a positioning member 430, a first positioning hole 210 is provided on the mounting pad 200, a second positioning hole is provided on a connecting terminal 22 of the cable assembly 20, and the positioning member 430 passes through the first positioning hole 210 and the second positioning hole to fix a connecting terminal 22 of the cable assembly 20 on the mounting pad 200. Optionally, there are multiple positioning holes and they are arranged in an array, so that a connecting terminal 22 of the cable assembly 20 can be installed on a suitable first positioning hole 210 according to the length of the cable assembly 20, so that cable assemblies 20 of different lengths can be fixed on the vibration test fixture 10 in a naturally stretched state. In this embodiment, the positioning member 430 is a bolt. In other embodiments, the positioning member 430 can also be a screw, a pin or a rivet.

[0031] Optionally, the mounting pad 200 has a first mounting plane, the first mounting plane is provided with a first positioning hole 210, a connecting terminal 22 of the cable assembly 20 has a second mounting plane, the second mounting plane is provided with a third positioning hole, and the first mounting plane is arranged opposite to the second mounting plane. This arrangement allows the connecting terminal 22 of the cable assembly 20 to be more firmly fixed on the mounting pad 200, prevents the cable assembly 20 from loosening, and reduces unnecessary experimental errors.

[0032] Specifically, the adjustment component is arranged on the adapter plate 100 and is spaced apart from the mounting pad 200. The adjustment component includes a mounting column 310, which is rotatably connected to the adapter plate 100. A first fastening hole is provided on the mounting column 310. The mounting column 310 can be rotated until the first fastening hole is opposite to the second fastening hole of another connecting terminal 22 of the cable assembly 20.

[0033] Furthermore, the adjustment assembly further includes a mounting bracket 320, and the mounting bracket 320 includes a first fixing plate 321 and a second fixing plate 322 that are connected to each other and arranged at an angle, the first fixing plate 321 is arranged on the adapter plate 100 and is spaced apart from the mounting pad 200, and the mounting column 310 is rotatably arranged on the second fixing plate 322. This arrangement enables the mounting column 310 to rotate relative to the adapter plate 100, and facilitates adjusting the direction of the mounting column 310 according to the difference in the crimping angles of the connecting terminals 22 at both ends of the cable assembly 20. In this embodiment, the first fixing plate 321 and the second fixing plate 322 are arranged vertically (it can be understood that the verticality here does not only refer to absolute verticality, but also a certain error should be allowed to exist, as long as the purpose can be achieved, all fall within the protection range), that is, the mounting bracket 320 is an "L"-shaped or "T"-shaped bracket.

[0034] In addition, the vibration test fixture 10 further includes an adjustment dial 330 connected to the mounting column 310, the adjustment dial 330 is disposed on a side of the second fixing plate 322 facing away from the mounting pad 200, the second fixing plate 322 is provided with a fixing hole, and one end of the mounting column 310 away from the adjustment dial 330 passes through the fixing hole. The adjustment dial 330 can conveniently adjust the setting angle of the mounting column 310.

[0035] Optionally, the distance between the adjusting turntable 330 and the second fixing plate 322 is adjustable, so that the cable assemblies 20 of different lengths can be in a naturally stretched state when fixed on the vibration test fixture 10 .

[0036] Specifically, the adjustment assembly further includes a locking member 340, and a locking hole 331 matching with the locking member 340 is provided on the adjustment dial 330, and the locking member 340 passes through the locking hole 331 and abuts against the second fixing plate 322. The locking member 340 abuts against the adjustment dial 330, thereby fixing the mounting column 310 at a suitable setting angle. On the one hand, it can prevent the mounting column 310 from rotating during the vibration test and causing the cable assembly 20 to loosen. On the other hand, when testing different cable assemblies 20, the locking member 340 can be loosened and the adjustment dial 330 can be readjusted, which is convenient and quick. Optionally, the locking member 340 is a bolt, and the locking hole 331 is a threaded hole matching with the bolt.

[0037] Specifically, the vibration test fixture 10 also includes a third mounting member 422, and a plurality of third mounting holes 120 are provided on the adapter plate 100, and the plurality of third mounting holes 120 are arranged in an array. The third mounting member 422 is used to pass through the first fixing plate 321 and the third mounting hole 120 to fix the first fixing plate 321 on the adapter plate 100. This arrangement facilitates adjusting the installation position of the first fixing plate 321 according to the length of the cable assembly 20, thereby adjusting the distance between the mounting pad 200 and the mounting column 310, so that the cable assembly 20 is in a naturally stretched state, improving the accuracy of the vibration test, and also broadening the scope of application of a single vibration test fixture 10. Optionally, the third mounting member 422 is a bolt, and the third mounting hole 120 is a threaded hole that matches the bolt. Of course, in other embodiments, the third mounting member 422 may also be a screw, a rivet, a pin or other mounting member.

[0038] Specifically, the distance between two adjacent third mounting holes 120 on the adapter plate 100 along the direction from the mounting pad 200 to the adjustment assembly is smaller than the maximum adjustable distance between the adjustment dial 330 and the second fixed plate 322. This arrangement can ensure that the distance between the mounting column 310 and the mounting pad 200 can be continuously changed, so that the vibration test fixture 10 can be flexibly used for cable assemblies 20 of different lengths.

[0039] Further, the mounting post 310 is provided with a first fastening hole, the other connecting terminal 22 of the cable assembly 20 is provided with a second fastening hole, and the fastener 440 passes through the first fastening hole and the second fastening hole to fix the other connecting terminal 22 of the cable assembly 20 to the mounting post 310. In this embodiment, the fastener 440 is a bolt. In other embodiments, the fastener 440 may also be a screw, a pin, a rivet, etc.

[0040] Optionally, the mounting column 310 has a third mounting plane, the third mounting plane is provided with a first fastening hole, the other connecting terminal 22 of the cable assembly 20 has a fourth mounting plane, the fourth mounting plane is provided with a second fastening hole, and the third mounting plane is arranged opposite to the fourth mounting plane. This arrangement allows the other connecting terminal 22 of the cable assembly 20 to be more firmly fixed on the mounting column 310, prevents the cable assembly 20 from loosening, and reduces unnecessary experimental errors.

[0041] Furthermore, the vibration test fixture 10 further includes a fixing assembly 500, which is disposed on the adapter plate 100, between the mounting pad 200 and the adjustment assembly, and is provided with a through hole for the cable assembly 20 to pass through. The fixing assembly 500 can play a certain supporting and fixing role for the cable body 21 located between the mounting pad 200 and the mounting column 310, thereby preventing the cable body 21 of a relatively long length from being suspended in the air and thus being easily broken during the vibration test, and also preventing the connection between the cable body 21 and the connection terminals 22 at both ends from being loosened or damaged.

[0042] Specifically, the fixing assembly 500 includes a support pad 510 and a stopper block 520. The support pad 510 is disposed on the adapter plate 100. The stopper block 520 is detachably connected to the support pad 510, and a through hole is formed between the stopper block 520 and the support pad 510. When the cable assembly 20 passes through the fixing assembly 500, the stopper block 520 is first separated from the support pad 510, and then the cable assembly 20 is placed on the support pad 510, and the stopper block 520 is connected to the support pad 510. The cable assembly 20 passes through the through hole between the stopper block 520 and the support pad 510, thereby supporting and fixing the cable body 21 located between the mounting pad 200 and the mounting column 310. This arrangement also facilitates the replacement of the cable assembly 20.

[0043] Furthermore, the vibration test fixture 10 also includes a fourth mounting member 423, and a plurality of fourth mounting holes 130 are provided on the adapter plate 100, and the plurality of fourth mounting holes 130 are arranged in an array, and the fourth mounting member 423 is used to pass through the fixing assembly 500 and the fourth mounting hole 130 to fix the fixing assembly 500 on the adapter plate 100. This arrangement facilitates the flexible setting of the position of the fixing assembly 500 according to the length and model of the cable assembly 20, so as to form an effective fixation and support for the cable assembly 20, and also expands the scope of application of the vibration test fixture 10. Optionally, the fourth mounting member 423 is a bolt, and the fourth mounting hole 130 is a threaded hole matched with the bolt. Of course, in other embodiments, the fourth mounting member 423 may also be a screw, a rivet, a pin or other mounting member.

[0044] Optionally, there are at least two groups of fixing components 500, and each group of fixing components 500 includes at least one fixing component 500. There are at least two adjusting components and they correspond to at least two groups of fixing components 500. The mounting pad 200, each group of fixing components 500 and each adjusting component are arranged at intervals. This arrangement can realize the simultaneous testing of the vibration characteristics of at least two cable assemblies 20, thereby improving the test efficiency. In this embodiment, the vibration test fixture 10 includes two groups of fixing components 500, each group of fixing components 500 includes three fixing components 500 and the three fixing components 500 are arranged at intervals along the direction from the mounting pad 200 to the adjusting component. Of course, in other embodiments, the position and quantity of the mounting pad 200, the fixing component 500 and the adjusting component can also be set according to actual needs.

[0045] The vibration test fixture 10 has at least the following advantages:

[0046] When the vibration test fixture 10 is used, the adapter plate 100 is first fixed on the vibration table. Then, one of the connection terminals 22 of the cable assembly 20 is fixed on the mounting pad 200, and then the mounting column 310 is rotated so that the first fastening hole of the mounting column 310 is opposite to the second fastening hole of another connection terminal 22 of the cable assembly 20 in a stress-free state, and then the other connection terminal 22 is fixed on the mounting column 310. The vibration test fixture 10 can well fix the connection terminals 22 of the cable assembly 20 with any degree of crimping angle deviation, without the need to twist the connection terminals 22 at both ends of the cable assembly 20 by external force until the second fastening holes of the connection terminals 22 are opposite to the first fastening holes on the mounting column 310. The cable assembly 20 is in a naturally stretched state as a whole, and the connection terminal 22 does not need to bear torsional stress and tension, and the crimping point between the connection terminal 22 and the cable body 21 is not easy to loosen. It also makes it difficult for the cable assembly 20 to be damaged unnecessarily, ensuring the accuracy of the vibration test results.

[0047] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A vibration test fixture, characterized in that: include: An adapter plate, used for being set on a vibration table; A mounting pad, disposed on the adapter plate, the mounting pad being used to fix one of the connection terminals of the cable assembly; an adjustment assembly, arranged on the adapter plate and spaced apart from the mounting pad, the adjustment assembly comprising a mounting post, the mounting post being rotatably connected to the adapter plate, the mounting post being provided with a first fastening hole, the mounting post being rotatable until the first fastening hole is opposite to a second fastening hole of another connecting terminal of the cable assembly; and a fastener passing through the first fastening hole and a second fastening hole of another connecting terminal of the cable assembly to fix one connecting terminal of the cable assembly to the mounting post; The adjustment assembly further includes a mounting bracket, the mounting bracket including a first fixing plate and a second fixing plate connected to each other and arranged at an angle, the first fixing plate being arranged on the adapter plate and spaced apart from the mounting pad, and the mounting column being rotatably arranged on the second fixing plate; The vibration test fixture further comprises an adjustment dial connected to the mounting column, wherein the adjustment dial is arranged on a side of the second fixing plate facing away from the mounting pad, and a fixing hole is arranged on the second fixing plate, and an end of the mounting column away from the adjustment dial passes through the fixing hole; The vibration test fixture further includes a second mounting member. The adapter plate is provided with a plurality of second mounting holes. The second mounting member is used to pass through the mounting pad and the second mounting holes to fix the mounting pad on the adapter plate.

2. The vibration test fixture according to claim 1, characterized in that: It also includes a first mounting member. The adapter plate is provided with a plurality of first mounting holes. The first mounting member passes through the first mounting holes to fix the adapter plate on the vibration table.

3. The vibration test fixture according to claim 1, characterized in that: The first fixing plate and the second fixing plate are arranged vertically.

4. The vibration test fixture according to claim 1, characterized in that: The distance between the adjusting turntable and the second fixing plate is adjustable so that cable assemblies of different lengths are in a naturally stretched state when fixed on the vibration test fixture.

5. The vibration test fixture according to claim 4, characterized in that: The adjustment assembly also includes a locking piece. The adjustment dial is provided with a locking hole matched with the locking piece. The locking piece passes through the locking hole and abuts against the second fixing plate.

6. The vibration test fixture according to claim 3, characterized in that: It also includes a third mounting member. The adapter plate is provided with a plurality of third mounting holes. The third mounting member is used to pass through the first fixing plate and the third mounting holes to fix the first fixing plate on the adapter plate.

7. The vibration test fixture according to any one of claims 1 to 6, characterized in that: There are at least two mounting pads, and at least two mounting pads are stacked.

8. The vibration test fixture according to any one of claims 1 to 6, characterized in that: It also includes a fixing component, which is arranged on the adapter plate, the fixing component is arranged between the mounting pad and the adjusting component, and the fixing component is provided with a through hole for the cable component to pass through.

9. The vibration test fixture according to claim 8, characterized in that: The fixing assembly includes a support pad and a limit block, the support pad is arranged on the adapter plate, the limit block is detachably connected to the support pad, and the through hole is formed between the limit block and the support pad.

10. The vibration test fixture according to claim 8, characterized in that: It also includes a fourth mounting member. The adapter plate is provided with a plurality of fourth mounting holes. The fourth mounting member is used to pass through the fixing assembly and the fourth mounting holes to fix the fixing assembly on the adapter plate.

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