A sample fixing clamp for automobile electronic vibration test

Abstract

The utility model discloses a kind of sample fixing clamps for automobile electronic vibration test applied to the field of automobile electronic detection, through the setting of annular installation groove, sliding plate, limit bolt and elastic member, in the vibration test process, when arc cover plate is influenced by vibration and has the tendency of rotation along annular sliding groove, elastic member will apply elastic force to sliding plate, make sliding plate drive limit bolt tightly insert into the bolt slot on clamping block, to effectively limit the rotation of arc cover plate, both retain the flexibility of the electronic product to be tested can rotate with rotary tube, also solve the problem that the electronic product to be tested and fixture structure produce tiny relative deviation due to arc cover plate rotation, to improve the stability of the electronic product to be tested on the fixing clamp, effectively improve the precision of test result;Meanwhile, by the setting of adjusting piece, further improve the convenience of operation and control precision of arc cover plate rotation.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronics testing, and in particular to a sample fixing fixture for automotive electronics vibration testing. Background Technology

[0002] The sample fixture for automotive electronic vibration testing is a tooling fixture specifically designed for automotive electronic products (such as in-vehicle terminals, displays, battery packs, etc.). It is used to stably fix the test sample on the vibration test platform to ensure that the sample is subjected to the specified vibration load during the test, so as to verify its environmental adaptability and reliability.

[0003] The prior art (patent document with publication number "CN117129175B") discloses a fixture for vibration testing of electronic measuring instruments, specifically disclosing: "A shock-absorbing bracket is fixedly mounted on the bottom of the base, and a motor mount is fixedly mounted on the top of the base... A clamping platform assembly is fixedly mounted on the top of the clamping plate, the clamping platform assembly including a connecting seat, a turntable rotatably connected to the top inner wall of the connecting seat, a U-shaped plate fixedly mounted on the top of the turntable, and a crescent plate fixedly mounted on the bottom inner wall of the U-shaped plate... The turntable is rotatably connected to the top inner wall of the connecting seat, allowing rotation..." The platform can rotate, and a damping fixing structure is set between the connecting seat and the turntable so that the turntable can be fixed after rotating to a suitable height. The rotating tube located between the crescent plate and the U-shaped plate can rotate by setting the first rotating wheel and the second rotating wheel. The top of the crescent plate is equipped with a rotating tube, and extension plates are fixedly installed on the outer edges of both ends of the rotating tube. Telescopic plates are sleeved on the outer edges of the extension plates. The telescopic plates are sleeved with the rotating tube through the extension plates, so that the telescopic plates located at both ends of the rotating tube can be adjusted in length, thereby allowing the equipment to meet the needs of products of different lengths.

[0004] The aforementioned fixture for vibration testing of electronic measuring instruments can also be used in vibration testing of automotive electronic products. However, there are still some problems with the use of this fixture. For example, its arc-shaped sleeve may rotate along the annular groove during vibration, and the fixture assembly also rotates relative to the arc-shaped sleeve, which may cause the electronic product under test to be unstable in the vibration environment and easily produce a slight relative offset with the fixture assembly, affecting the accuracy of the test results. Summary of the Invention

[0005] The core of this utility model lies in the use of annular mounting groove, sliding plate, limit bolt and elastic element to solve the problem that the arc-shaped sleeve is prone to instability during vibration in the prior art, which causes electronic products to deviate. At the same time, it further improves the convenience of operation and the control accuracy of the arc-shaped sleeve rotation.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A sample fixing fixture for automotive electronic vibration testing includes a rotating tube rotatably connected between a U-shaped plate and a crescent plate, a telescopic plate rotatably sleeved at the end of the rotating tube and lockably fixed to the rotating tube, an arc-shaped sleeve plate rotatably snapped onto the front end of the telescopic plate, and a fixture structure rotatably connected to one side of the arc-shaped sleeve plate. The telescopic plate has annular grooves on both its inner and outer sides. One side of the arc-shaped sleeve plate has a locking block integrally formed and rotatably embedded in the annular groove. A rotating shaft rotatably connected to the fixture structure is also fixed on the side of the arc-shaped sleeve plate away from the middle of the rotating tube. An annular mounting groove is provided at the end of the telescopic plate away from the middle of the rotating tube. A sliding plate is elastically connected in the annular mounting groove through an elastic element. The elastic element applies a force to the sliding plate to make the sliding plate slide towards the middle of the rotating tube. A limit bolt is fixed at one end of the sliding plate near the middle of the rotating tube. Two sets of limit bolts are provided and distributed in an inner and outer ring on the side wall of the sliding plate. Both sets of limit bolts slide through the telescopic plate and extend into the annular groove. Two sets of bolt grooves are provided on the side of the locking block near the sliding plate. The two sets of bolt grooves correspond to the positions of two sets of limit bolts, and the ends of the two sets of limit bolts are inserted into the two sets of bolt grooves respectively.

[0008] By incorporating an annular mounting groove, a sliding plate, a limiting bolt, and an elastic element, when the arc-shaped sleeve plate tends to rotate along the annular groove due to vibration, the elastic element applies a spring force to the sliding plate, causing the sliding plate to drive the limiting bolt to be tightly inserted into the bolt groove on the clamping block. This effectively restricts the rotation of the arc-shaped sleeve plate, solving the problem of slight relative displacement between the tested electronic product and the fixture structure caused by the rotation of the arc-shaped sleeve plate. This improves the stability of the tested electronic product on the fixed fixture and effectively enhances the accuracy of the test results.

[0009] Furthermore, the elastic element includes a tension spring, with both ends of the tension spring fixed to the limit bolt and the inner sidewall of the annular mounting groove, respectively. Multiple tension springs are arranged in a circumferential array along the central axis of the sliding plate, and all the tension springs are located in the gap between the two sets of limit bolts.

[0010] Furthermore, there is a gap between the side wall of the sliding plate away from the limit bolt and the side wall of the annular mounting groove away from the locking block, and the gap is larger than the length of the limit bolt inserted into the bolt groove.

[0011] Furthermore, an annular limiting groove is provided on the side of the sliding plate away from the limiting bolt, and an adjusting component is slidably embedded in the annular limiting groove. The adjusting component is used to drive the annular limiting groove to overcome the elastic force of the tension spring, so that the annular limiting groove slides along the axial direction of the telescopic plate in the annular mounting groove.

[0012] Furthermore, the adjusting component includes an adjusting screw, an insert block, and an adjusting handle. The adjusting screw is threaded through the side wall of the arc-shaped sleeve plate. One end of the adjusting screw extends into the annular limiting groove. The insert block is rotatably embedded in the annular limiting groove and fixed to one end of the adjusting screw. The other end of the adjusting screw extends to the outside of the arc-shaped sleeve plate away from the telescopic plate and is fixed to the adjusting handle.

[0013] Furthermore, a threaded sleeve is fixedly embedded in the arc-shaped sleeve plate, and the adjusting screw is adapted to the thread of the threaded sleeve and passes through the threaded sleeve; The adjusting component and the rotating shaft are staggered on the arc-shaped sleeve plate.

[0014] Preferably, the sidewall of the embedded block is provided with rolling balls, and the portion of the rolling balls located on the outside of the embedded block rolls against the inner sidewall of the annular limiting groove.

[0015] Compared with existing technologies, the advantages of this utility model are: (1) This scheme, through the setting of annular mounting groove, sliding plate, limit bolt and elastic element, when the arc sleeve plate is affected by vibration and tends to rotate along the annular groove during the vibration test, the elastic element will apply elastic force to the sliding plate, so that the sliding plate drives the limit bolt to be tightly inserted into the bolt groove on the card block, thereby effectively restricting the rotation of the arc sleeve plate. This not only preserves the flexibility of the tested electronic product to rotate with the rotating tube, but also solves the problem of slight relative displacement between the tested electronic product and the fixture structure caused by the rotation of the arc sleeve plate, thereby improving the stability of the tested electronic product on the fixed fixture and effectively improving the accuracy of the test results.

[0016] (2) With the setting of the adjustment component, the operator can rotate the adjustment handle to drive the adjustment screw to rotate. Since the adjustment screw is threaded and the screw sleeve is threaded, the adjustment screw will move along its axis under the action of the thread transmission, which in turn drives the embedded block to move. The embedded block then drives the sliding plate to overcome the elastic force of the tension spring and slide along the axis of the telescopic plate in the annular mounting groove, so that the limit bolt can move more flexibly, which makes it convenient for the operator to control the matching state of the limit bolt and the bolt groove according to actual needs, further improving the convenience of operation and the control accuracy of the arc sleeve plate rotation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side sectional view of the telescopic plate and arc-shaped sleeve of this utility model; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the arc-shaped sleeve and adjusting component of this utility model.

[0018] Explanation of the labels in the diagram: 1. Rotary pipe; 2. Telescopic plate; 21. Annular slide groove; 22. Annular mounting groove; 3. Arc-shaped sleeve plate; 31. Locking block; 311. Bolt groove; 32. Rotating shaft; 33. Screw sleeve; 4. Clamping structure; 5. Sliding plate; 51. Limiting bolt; 52. Annular limiting groove; 6. Tension spring; 7. Adjusting component; 71. Adjusting screw; 72. Embedded block; 73. Adjusting handle; 74. Ball bearing. Detailed Implementation

[0019] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0020] First implementation method: Please see Figure 1 - Figure 4 A sample fixing fixture for automotive electronic vibration testing includes a rotating tube 1 rotatably connected between a U-shaped plate and a crescent plate, a telescopic plate 2 rotatably sleeved at the end of the rotating tube 1 and lockably fixed to the rotating tube 1, an arc-shaped sleeve plate 3 rotatably snapped onto the front end of the telescopic plate 2, and a fixture structure 4 rotatably connected to one side of the arc-shaped sleeve plate 3. The telescopic plate 2 has annular grooves 21 on both its inner and outer sides. One side of the arc-shaped sleeve plate 3 is integrally formed with a locking block 31 rotatably embedded in the annular groove 21. The side of the arc-shaped sleeve plate 3 away from the middle of the rotating tube 1 is also fixed with a rotating shaft 32 rotatably connected to the fixture structure 4. An annular mounting groove 22 is provided at one end of the telescopic plate 2 away from the middle of the rotating tube 1. A sliding plate 5 is elastically connected to the annular mounting groove 22 by an elastic element. The sliding plate 5 is made of a thermoplastic sheet with a certain elasticity, such as a polyvinyl chloride sheet (PVC sheet). The elastic element applies a force to the sliding plate 5 to make the sliding plate 5 slide towards the middle of the rotating tube 1. Specifically, the elastic element includes a tension spring 6. The two ends of the tension spring 6 are fixed to the limit bolt 51 and the inner wall of the annular mounting groove 22, respectively. Multiple tension springs 6 are arranged and distributed in a circumferential array along the central axis of the sliding plate 5. The multiple tension springs 6 are all located in the gap between the two sets of limit bolts 51. A limit bolt 51 is fixed at one end of the sliding plate 5 near the middle of the rotating tube 1. Two sets of limit bolts 51 are provided and distributed in an inner and outer ring on the side wall of the sliding plate 5. Both sets of limit bolts 51 slide through the telescopic plate 2 and extend into the annular groove 21. The locking block 31 has two sets of bolt grooves 311 on the side near the sliding plate 5. The two sets of bolt grooves 311 correspond to the positions of the two sets of limit bolts 51, and the ends of the two sets of limit bolts 51 are inserted into the two sets of bolt grooves 311 respectively.

[0021] Based on the above structure, during the vibration test, when the arc-shaped sleeve plate 3 tends to rotate along the annular slide groove 21 due to vibration, the tension spring 6 will apply elastic force to the sliding plate 5, causing the sliding plate 5 to drive the limiting bolt 51 to be tightly inserted into the bolt groove 311 on the card block 31, thereby effectively limiting the rotation of the arc-shaped sleeve plate 3. This not only preserves the flexibility of the tested electronic product to rotate with the rotating tube 1, but also solves the problem of slight relative displacement between the tested electronic product and the fixture structure 4 caused by the rotation of the arc-shaped sleeve plate 3, thereby improving the stability of the tested electronic product on the fixed fixture and effectively improving the accuracy of the test results. In addition, when the operator applies a force greater than that of the sliding plate 5 and the tension spring 6 to the arc-shaped sleeve 3, it will drive the locking block 31 to press the limiting bolt 51 to move in the opposite direction, causing the limiting bolt 51 to disengage from the bolt groove 311, thereby allowing the arc-shaped sleeve 3 to rotate, thus retaining the purpose of adjusting the position of the clamp structure 4 by adjusting the position of the arc-shaped sleeve 3.

[0022] Furthermore, in order to ensure that the limit bolt 51 has sufficient sliding distance so that the limit bolt 51 can disengage from the bolt groove 311, there is a gap between the side wall of the sliding plate 5 away from the limit bolt 51 and the side wall of the annular mounting groove 22 away from the locking block 31. The gap is larger than the length of the limit bolt 51 inserted into the bolt groove 311, thereby meeting the sliding distance requirement when the limit bolt 51 disengages from the bolt groove 311.

[0023] Furthermore, an annular limiting groove 52 is provided on the side of the sliding plate 5 away from the limiting bolt 51. An adjusting member 7 is slidably embedded in the annular limiting groove 52. The adjusting member 7 is used to drive the annular limiting groove 52 to overcome the elastic force of the tension spring 6, so that the annular limiting groove 52 slides along the axial direction of the telescopic plate 2 in the annular mounting groove 22. Specifically, the adjusting component 7 includes an adjusting screw 71, an insert block 72, and an adjusting handle 73. The adjusting screw 71 is threaded through the side wall of the arc-shaped sleeve plate 3. A threaded sleeve 33 for the adjusting screw 71 to pass through can be fixedly embedded on the arc-shaped sleeve plate 3, so that the adjusting screw 71 and the threaded sleeve 33 are threadedly matched. One end of the adjusting screw 71 extends into the annular limiting groove 52. The insert block 72 is rotatably embedded in the annular limiting groove 52 and fixed to one end of the adjusting screw 71. The other end of the adjusting screw 71 extends to the outside of the arc-shaped sleeve plate 3 away from the telescopic plate 2 and is fixed to the adjusting handle 73. The adjusting component 7 and the rotating shaft 32 are offset on the arc-shaped sleeve plate 3.

[0024] With the adjustment component 7, the operator can rotate the adjustment handle 73 to drive the adjustment screw 71 to rotate. Since the adjustment screw 71 is threadedly matched with the screw sleeve 33, the adjustment screw 71 will move along its axial direction under the action of thread transmission, thereby driving the embedded block 72 to move. The embedded block 72 then drives the sliding plate 5 to overcome the elastic force of the tension spring 6 and slide along the axial direction of the telescopic plate 2 in the annular mounting groove 22. This allows the limit bolt 51 to move more flexibly, making it convenient for the operator to control the matching state of the limit bolt 51 and the bolt groove 311 according to actual needs, further improving the convenience of operation and the control accuracy of the rotation of the arc-shaped sleeve 3.

[0025] Second implementation method: Please see Figure 4 A sample clamp for automotive electronic vibration testing, which differs from the first embodiment in that: The side wall of the embedded block 72 is fitted with rolling balls 74. The portion of the rolling balls 74 located on the outer side of the embedded block 72 rolls against the inner side wall of the annular limiting groove 52. By setting the rolling balls 74, the sliding friction between the embedded block 72 and the inner side wall of the annular limiting groove 52 is transformed into rolling friction, which effectively reduces the frictional resistance during the adjustment process. This allows the operator to rotate the adjusting handle 73 more easily, thereby driving the adjusting screw 71 and the embedded block 72 to rotate within the annular limiting groove 52. The movement of the embedded block 72 drives the sliding plate 5 to move, reducing the wear of the sliding plate 5 and the embedded block 72 and extending their service life.

[0026] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A sample fixing fixture for automotive electronic vibration testing, comprising a rotating tube (1) rotatably connected between a U-shaped plate and a crescent plate, a telescopic plate (2) rotatably sleeved at the end of the rotating tube (1) and lockably fixed to the rotating tube (1), an arc-shaped sleeve plate (3) rotatably snapped onto the front end of the telescopic plate (2), and a fixture structure (4) rotatably connected to one side of the arc-shaped sleeve plate (3), wherein the telescopic plate (2) has an annular groove (21) on both its inner and outer sides, and one side of the arc-shaped sleeve plate (3) is integrally formed with a locking block (31) rotatably embedded in the annular groove (21), and a rotating shaft (32) rotatably connected to the fixture structure (4) is fixed on the side of the arc-shaped sleeve plate (3) away from the middle of the rotating tube (1), characterized in that: The telescopic plate (2) has an annular mounting groove (22) at one end away from the middle of the rotating tube (1), and a sliding plate (5) is elastically connected in the annular mounting groove (22) through an elastic element. The sliding plate (5) is fixed with a limit bolt (51) at one end near the middle of the rotating tube (1). Two sets of the limit bolts (51) are arranged in an inner and outer ring on the side wall of the sliding plate (5). Both sets of the limit bolts (51) slide through the telescopic plate (2) and extend into the annular groove (21). The card block (31) has two sets of bolt grooves (311) on the side near the sliding plate (5). The two sets of bolt grooves (311) correspond to the positions of the two sets of limit bolts (51) respectively, and the ends of the two sets of limit bolts (51) are inserted into the two sets of bolt grooves (311) respectively.

2. The sample fixing fixture for automotive electronic vibration testing according to claim 1, characterized in that: The elastic element includes a tension spring (6), the two ends of which are fixed to the limit bolt (51) and the inner wall of the annular mounting groove (22) respectively. Multiple tension springs (6) are arranged and distributed in a circumferential array along the central axis of the sliding plate (5). Multiple tension springs (6) are located in the gap between the two sets of limit bolts (51).

3. The sample fixing fixture for automotive electronic vibration testing according to claim 1, characterized in that: There is a gap between the side wall of the sliding plate (5) away from the limit bolt (51) and the side wall of the annular mounting groove (22) away from the locking block (31), and the gap is larger than the length of the limit bolt (51) inserted into the bolt groove (311).

4. A sample fixing fixture for automotive electronic vibration testing according to claim 1, characterized in that: The sliding plate (5) has an annular limiting groove (52) on the side away from the limiting bolt (51), and an adjusting member (7) is slidably embedded in the annular limiting groove (52).

5. A sample fixing fixture for automotive electronic vibration testing according to claim 4, characterized in that: The adjusting component (7) includes an adjusting screw (71), an insert block (72), and an adjusting handle (73). The adjusting screw (71) is threaded through the side wall of the arc-shaped sleeve plate (3). One end of the adjusting screw (71) extends into the annular limiting groove (52). The insert block (72) is rotatably embedded in the annular limiting groove (52) and fixed to one end of the adjusting screw (71). The other end of the adjusting screw (71) extends to the outside of the arc-shaped sleeve plate (3) away from the telescopic plate (2) and is fixed to the adjusting handle (73).

6. A sample fixing fixture for automotive electronic vibration testing according to claim 5, characterized in that: A screw sleeve (33) is fixedly embedded on the arc-shaped sleeve plate (3), and the adjusting screw (71) is threadedly matched with the screw sleeve (33) and passes through the screw sleeve (33). The adjusting component (7) and the rotating shaft (32) are offset on the arc-shaped sleeve (3).

7. A sample fixing fixture for automotive electronic vibration testing according to claim 6, characterized in that: The sidewall of the embedded block (72) is provided with rolling balls (74), and the portion of the rolling balls (74) located outside the embedded block (72) rolls against the inner sidewall of the annular limiting groove (52).

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