CN217059246U - Test positioning device and vibration test system - Google Patents

Abstract

The utility model relates to the technical field of test equipment, in particular to a test positioning device and a vibration test system for a notebook computer, which comprises a platform, a horizontal limit structure and a lifting limit structure; a test site is arranged on the first surface of the platform; the horizontal limiting structure comprises a baffle, a movable support and a first driving assembly, wherein the first end of the movable support is connected with the first driving assembly, the second end of the movable support is connected with the baffle, the baffle is positioned on one side of the test position, and the baffle is used for moving in the direction parallel to the first surface; the lifting limiting structure comprises a pressing block, a lifting support and a second driving assembly, the first end of the lifting support is connected with the second driving assembly, the second end of the lifting support is connected with the pressing block, the pressing block is at least partially overlapped with the test position in a vertical projection direction of the test position, and the pressing block is used for moving in a direction perpendicular to the first surface. The utility model discloses technical scheme can realize the automatic positioning operation to the product that awaits measuring, and this operation required time is short, and fixes a position easy operation.

Description

Test positioning device and vibration test system

Technical Field

The utility model relates to a test equipment technical field especially relates to a test positioner and vibration test system for notebook computer.

Background

The notebook computer is often exposed to bumpy situations in daily use, for example, the notebook computer is placed in a backpack, and when a user takes a vehicle, the notebook computer bumps synchronously with the vehicle. Therefore, in the development process of the notebook computer, the performance of the notebook computer after being vibrated needs to be tested.

At present, a vibration experiment table is generally adopted for a vibration experiment of a notebook computer. The notebook computer is fixed on the experiment table through the clamp, and then the experiment table is vibrated to simulate daily bumping amplitude which may occur. In the conventional vibration experiment table, a manual operation clamp is required to assemble and fix the notebook computer, for example, when the notebook computer is fixed with 6 degrees of freedom, at least 12 screwing operations need to be manually completed.

The existing vibration experiment table needs to manually operate a clamp, so that the operation is time-consuming and labor-consuming; in addition, the vibration experiment table can only fix one notebook computer generally, which causes the efficiency of the vibration experiment to be lower.

Disclosure of Invention

For solving the technical problem more than at least that exists among the prior art, the embodiment of the utility model provides a test positioner and vibration test system.

The embodiment of the utility model provides a test positioning device on one hand, including platform, horizontal limit structure and lift limit structure; a test position for placing a product to be tested is arranged on the first surface of the platform; the horizontal limiting structure comprises a baffle, a movable support and a first driving assembly, wherein the first end of the movable support is connected with the first driving assembly, the second end of the movable support is connected with the baffle, the baffle is positioned on one side of the test position, and the baffle is used for moving in the direction parallel to the first surface; the lifting limiting structure comprises a pressing block, a lifting support and a second driving assembly, the first end of the lifting support is connected with the second driving assembly, the second end of the lifting support is connected with the pressing block, the perpendicular projection of the pressing block to the direction of the test position is at least partially overlapped with the test position, and the pressing block is used for moving in the direction perpendicular to the first surface.

In some embodiments, the first surface of the platform is provided with a first groove, the bottom of the first groove is a plane, and the test site is arranged at the bottom of the first groove.

In some embodiments, the baffle is located in the first groove, and the baffle comprises a pushing surface for pushing a product to be tested; the first driving assembly comprises a first lead screw and a first motor, a driving shaft of the first motor is connected with the first lead screw and is used for driving the first lead screw to axially rotate, and the axis of the first lead screw is parallel to the first surface; the first end of the movable support is in threaded connection with the first lead screw.

In some embodiments, the first lead screw and the first motor are located on a side of the platform away from the first surface; the second surface of platform is equipped with the second recess, be equipped with on the lateral wall of second recess with the communicating through-hole of first recess, the movable support includes horizontal pole and vertical pole, the first end of horizontal pole passes the through-hole with the baffle is connected, the second end of horizontal pole with the first end of vertical pole is connected, the second end of vertical pole with first lead screw threaded connection.

In some embodiments, a support plate is disposed on the platform, the support plate is parallel to the first surface and has a set interval with the first surface, and two ends of the support plate are fixedly connected with the first surface; the pressing block comprises a pressing surface used for pressing a product to be tested, and is positioned between the supporting plate and the first surface; the second driving assembly comprises a second lead screw and a second motor, a driving shaft of the second motor is connected with the second lead screw and is used for driving the second lead screw to axially rotate, the second motor is connected with the supporting plate, and the axis of the second lead screw is perpendicular to the supporting plate and the first surface; the lifting support comprises a guide rail and a lifting rod, the guide rail is in threaded connection with the second lead screw, the first end of the lifting rod is connected with the guide rail, and the second end of the lifting rod penetrates through the supporting plate and is connected with the pressing block.

In some embodiments, a plurality of said horizontal stop structures are included; the moving directions of the baffles in the horizontal limiting structures are different.

In some embodiments, two test sites are arranged in the first groove side by side; the first lead screw comprises a driving lead screw and a driven lead screw which are arranged in parallel, a driving gear is arranged on the driving lead screw, a driven gear meshed with the driving gear is arranged on the driven lead screw, and the driving lead screw is connected with the first motor; the driving lead screw and the driven lead screw are respectively connected with the baffle through the movable support, and the moving directions of the baffle driven by the driving lead screw and the baffle driven by the driven lead screw are opposite.

In some embodiments, the lifting support comprises two lifting rods, the first end and the second end of the guide rail are respectively connected with the two lifting rods, the middle part of the guide rail is in threaded connection with the second lead screw, and the two lifting rods are respectively connected with the pressing block.

In some embodiments, a spacing plate is arranged between the two test positions in the first groove, and a limiting plate is arranged at the side end of the spacing plate along the width direction of the spacing plate; the width of the limiting plate is larger than that of the spacing plate, and the limiting plate is detachably connected with the spacing plate.

An aspect of the embodiment of the present invention provides a vibration test system, including the above-mentioned test positioner.

The embodiment of the utility model provides an among test positioning device and vibration test system, through horizontal limit structure and lift limit structure, fix a position the product that awaits measuring on the test position, wherein, horizontal limit operation and lift (perpendicular) spacing operation utilize corresponding drive assembly drive to accomplish automatically, and then can realize the automatic positioning operation to the product that awaits measuring, and this operation required time is short, and fixes a position easy operation.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

in the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

Fig. 1 is a schematic structural diagram of a test positioning device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a bottom of a test positioning device according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a horizontal limiting structure of a test positioning device according to an embodiment of the present invention;

fig. 4 is a partial enlarged view of a second groove of the test positioning device according to an embodiment of the present invention;

fig. 5 is a front view of a lifting limiting structure of a test positioning device according to an embodiment of the present invention;

fig. 6 is a partial enlarged view of the driving gear and the driven gear of the test positioning device according to the embodiment of the present invention;

fig. 7 is a top view of a spacer plate of a test positioning device according to an embodiment of the present invention.

In the figure:

1: a platform; 2: a horizontal limiting structure; 3: a lifting limit structure; 4: a product to be tested;

11: a first surface; 12: a first groove; 13: a second surface; 14: a second groove; 15: a partition plate; 16: a limiting plate;

21: a baffle plate; 22: moving the support; 221: a cross bar; 222: a longitudinal bar; 23: a first drive assembly; 231: a first lead screw; 2311: an active lead screw; 2312: a driven lead screw; 2313: a driving gear; 2314: a driven gear; 232: a first motor; .

31: briquetting; 32: a lifting support; 321: a guide rail; 322: a lifting rod; 33: a second drive assembly; 331: a second lead screw; 332: a second motor; 34: and a support plate.

Detailed Description

To make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 7, the present invention provides a testing and positioning device, which comprises a platform 1, a horizontal limiting structure 2 and a lifting limiting structure 3; the first surface 11 of the platform 1 is provided with a test position for placing the product 4 to be tested; the horizontal limiting structure 2 comprises a baffle plate 21, a movable bracket 22 and a first driving assembly 23, wherein the first end of the movable bracket 22 is connected with the first driving assembly 23, the second end of the movable bracket 22 is connected with the baffle plate 21, the baffle plate 21 is positioned on one side of the test position, and the baffle plate 21 is used for moving in the direction parallel to the first surface 11; the lifting limiting structure 3 comprises a pressing block 31, a lifting support 32 and a second driving assembly 33, a first end of the lifting support 32 is connected with the second driving assembly 33, a second end of the lifting support is connected with the pressing block 31, a vertical projection of the pressing block 31 to the direction of the test position is at least partially overlapped with the test position, and the pressing block 31 is used for moving in the direction perpendicular to the first surface 11.

Before the test positioning device is used, the product 4 to be tested is placed on a test position in advance. For example, the product 4 to be tested is a notebook computer. After the test is started:

firstly, the baffle 21 in the horizontal limiting structure 2 is driven to move by the driving component, and the baffle 21 pushes the product 4 to be tested to a specified position. For example, a partition plate 15 is disposed on one side of the test site, and the product 4 to be tested is abutted against the partition plate 15 at the designated position, or the product 4 to be tested is pushed to the designated position without the partition plate 15. When the product 4 to be tested reaches the designated position, the baffle 21 is retracted, so that a certain gap exists between the baffle 21 and the product 4 to be tested, the distance of the gap is a preset value, when the product 4 to be tested is tested, various different gap set values can be set, and the gap is a gap which can simulate the product 4 to be tested to generate bumping movement when in use.

After the position in the horizontal direction is determined, the lifting limiting structure 3 is adjusted, the pressing block 31 in the lifting limiting structure 3 is driven by the driving assembly to descend and press on the product 4 to be detected, and similarly, the pressing block 31 ascends for a certain distance, so that a gap also exists between the product 4 to be detected and the pressing block 31, and the gap is also used for simulating a gap which can generate bumping movement. A limit relationship is required between the pressing block 31 and the product 4 to be detected. For example, the center of the pressing block 31 coincides with the center of the product 4 to be measured, or the centers of the pressing block and the product may not coincide with each other.

The horizontal positioning and the vertical positioning of the product 4 to be detected are automatically completed, the required time for the operation is short, and the positioning operation is simple. The platform 1, the horizontal limiting structure 2 and the lifting limiting structure 3 will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, in some embodiments, the first surface 11 of the platform 1 is provided with a first groove 12, the bottom of the first groove 12 is a plane, and the testing position is disposed at the bottom of the first groove 12. For example, the cross-sectional shape of the first groove 12 is a rectangle or a regular polygon. The product 4 to be tested is placed in the first groove 12, the corresponding baffle 21 is positioned in the first groove 12, and the baffle 21 comprises a pushing surface for pushing the product 4 to be tested; the first driving assembly 23 includes a first lead screw 231 and a first motor 232, a driving shaft of the first motor 232 is connected to the first lead screw 231 and is used for driving the first lead screw 231 to axially rotate, and an axis of the first lead screw 231 is parallel to the first surface 11; the first end of the moving bracket 22 is threadedly coupled to the first lead screw 231.

For example, the pushing surface of the shutter 21 is made of a soft material, or a soft material layer such as a rubber material is attached to the pushing surface, so that the product 4 to be measured can be prevented from being scratched by the soft material. As shown in fig. 3, in the embodiment of the present disclosure, the first motor 232 drives the first lead screw 231 to rotate, the first lead screw 231 rotates in situ, and the first lead screw 231 is in threaded connection with the first end of the movable bracket 22, so that the movable bracket 22 can be driven by the first lead screw 231 to move along the axial direction of the first lead screw 231. By controlling the forward and backward rotation of the first motor 232, the moving direction of the moving bracket 22 on the first lead screw 231 can be adjusted.

As shown in fig. 2 to 4, in some embodiments, the first lead screw 231 and the first motor 232 are located on a side of the platform 1 away from the first surface 11; the second surface 13 of the platform 1 is provided with a second groove 14, one side wall of the second groove 14 is provided with a through hole communicated with the first groove 12, the movable support 22 comprises a cross rod 221 and a longitudinal rod 222, the first end of the cross rod 221 penetrates through the through hole to be connected with the baffle 21, the second end of the cross rod 221 is connected with the first end of the longitudinal rod 222, and the second end of the longitudinal rod 222 is in threaded connection with a first lead screw 231. The first lead screw 231, the first motor 232 and other components are arranged on the back side of the platform 1, so that the oversize of the whole structure can be avoided, and in addition, the platform 1 has a certain size, so that the first lead screw 231 below the platform has sufficient arrangement space, and the limitation of the arrangement length of the lead screw can be avoided.

For example, the width of the second groove 14 along the axial direction of the first lead screw 231 can satisfy the moving distance requirement of the baffle 21.

In some embodiments, a plurality of horizontal stop structures 2 are included; the plurality of horizontal limiting structures 2 have different moving directions of the baffle plates 21. The number of the horizontal limiting structures 2 is selected according to the appearance or the positioning requirement of the product 4 to be detected. For example, the product 4 to be tested is a notebook computer, and the shape thereof approaches to a rectangular parallelepiped, so that, in the horizontal direction, the long side and the short side thereof can be selectively positioned, that is, as shown in fig. 1 and fig. 2, two horizontal limiting structures 2 are arranged in the horizontal direction. For example, three, four or more horizontal limiting structures 2 can be arranged on one product 4 to be tested at the same time.

As shown in fig. 1 and 5, in some embodiments, a supporting plate 34 is disposed on the platform 1, the supporting plate 34 is parallel to the first surface 11 and has a predetermined interval with the first surface 11, and two ends of the supporting plate 34 are fixedly connected to the first surface 11; pressing block 31 includes a pressing surface for pressing product 4 to be measured, and pressing block 31 is located between supporting plate 34 and first surface 11; the second driving assembly 33 comprises a second lead screw 331 and a second motor 332, a driving shaft of the second motor 332 is connected with the second lead screw 331 and is used for driving the second lead screw 331 to rotate axially, the second motor 332 is connected with the supporting plate 34, and an axis of the second lead screw 331 is perpendicular to the supporting plate 34 and the first surface 11; the lifting support 32 comprises a guide rail 321 and a lifting rod 322, the guide rail 321 is in threaded connection with the second lead screw 331, a first end of the lifting rod 322 is connected with the guide rail 321, and a second end of the lifting rod 322 passes through the support plate 34 and is connected with the pressing block 31.

For example, the center of the pressing block 31 coincides with the center of the test site, or the center of the product 4 to be tested coincides with the center of the pressing block 31 after being adjusted by the horizontal limiting structure 2. For example, the pressing surface of the pressing block 31 is made of a soft material, or a soft material layer, such as a rubber material, is attached to the pressing surface of the pressing block 31, so that the product 4 to be measured can be prevented from being scratched by the soft material. The second motor 332 is fixed on the supporting plate 34, the second lead screw 331 is fixed relative to the supporting plate 34, and the guide rail 321 is in threaded connection with the second lead screw 331, so that when the second lead screw 331 rotates, the guide rail 321 can be driven to move along the axis direction of the second lead screw 331, and the second lead screw 331 is arranged perpendicular to the test position, so as to adjust the pressing block 31 along the perpendicular direction. For example, the elevation or the lowering of the guide rail 321 and the elevation rod 322 is controlled by controlling the forward and backward rotation of the second motor 332.

In some embodiments, two products 4 to be tested can be tested simultaneously on one test positioning device, so that the test efficiency can be further improved, and under the condition of increasing the test quantity, all matched test structures do not need to be added, that is, a part of structures used for testing can be shared, thereby achieving the effects of increasing the efficiency and saving the cost.

For example, two test sites are disposed side by side in the first groove 12; as shown in fig. 6, the first lead screw 231 includes a driving lead screw 2311 and a driven lead screw 2312 which are arranged in parallel, a driving gear 2313 is arranged on the driving lead screw 2311, a driven gear 2314 meshed with the driving gear 2313 is arranged on the driven lead screw 2312, and the driving lead screw 2311 is connected with the first motor 232; the driving lead screw 2311 and the driven lead screw 2312 are respectively connected with the baffle 21 through the movable support 22, and the moving directions of the baffle 21 driven by the driving lead screw 2311 and the baffle 21 driven by the driven lead screw 2312 are opposite.

In the above embodiment, the two moving brackets 22 and the barrier 21 can be simultaneously driven to move by using one first motor 232. When the device is used, the driving gear 2313 is meshed with the driven gear 2314, so that the rotating direction of the driven lead screw 2312 is opposite to that of the driving lead screw 2311, and correspondingly, the moving direction of the moving support 22 on the driven lead screw 2312 is opposite to that of the moving support 22 on the driving lead screw 2311. Two products 4 to be tested are placed between the two baffles 21, and the opposite movement of the two baffles 21 can push the two products 4 to be tested to move to a common point, for example, to move in the direction between the two products 4 to be tested, so that the purpose of positioning the two products 4 to be tested simultaneously is achieved.

When two products 4 to be detected are detected simultaneously, the number of the pressing blocks 31 in the lifting limiting structure 3 can be changed. For example, the lifting bracket 32 includes two lifting rods 322, the first end and the second end of the guide rail 321 are respectively connected to the two lifting rods 322, the middle portion of the guide rail 321 is connected to the second lead screw 331 by a thread, and the two lifting rods 322 are respectively connected to the pressing block 31. The two pressing blocks 31 are used for respectively pressing the corresponding products 4 to be measured in the vertical direction. In the embodiment of the present disclosure, it is not limited to this, and for example, when the size of one pressing block 31 is sufficient to press two products 4 to be measured, the structure of one pressing block 31 may also be used alternatively.

In some embodiments, multiple sets of horizontal limiting structures 2 and lifting limiting structures 3 can be arranged on the same platform 1, each set of horizontal limiting structures 2 and lifting limiting structures 3 can test two products 4 to be tested, and multiple sets of horizontal limiting structures 2 and lifting limiting structures 3 can test more products 4 to be tested.

As shown in fig. 7, a partition plate 15 is arranged between the two test positions in the first groove 12, and a limit plate 16 arranged along the width direction of the partition plate 15 is arranged at the side end of the partition plate 15; the width of the limiting plate 16 is larger than that of the partition plate 15, and the limiting plate 16 is detachably connected with the partition plate 15.

For example, by providing the partition plate 15, two products 4 to be tested can be separated, so as to avoid contact between the products 4 to be tested during positioning or testing. In addition, the position of the product 4 to be measured is adjusted by the limiting plate 16 on the spacing plate 15. During the positioning operation, one side end of the product 4 to be measured abuts against the partition plate 15, then, the pressing block 31 presses on the product 4 to be measured, and in order to improve the pressing stability of the pressing block 31, the pressing block 31 and the center of the product 4 to be measured are overlapped as much as possible.

For products 4 to be tested of different models, the sizes of the products are different, and therefore, the abutting position of the products 4 to be tested can be adjusted by adjusting and replacing the limiting plate 16. When the width of limiting plate 16 was greater than the width of space bar 15 promptly, the product 4 that awaits measuring can the butt on limiting plate 16, consequently, when the width of limiting plate 16 is great, the product 4 that awaits measuring is great apart from the distance of space bar 15, and when the width of limiting plate 16 was less, the product 4 that awaits measuring is less apart from the distance of space bar 15. By replacing the limit plate 16, the position of the product 4 to be measured can be adjusted.

With reference to fig. 7, the limiting plates 16 are detachably connected to the partition 15 by screws, and the corresponding limiting plate 16 is selected according to the size of the product 4 to be measured and the position of the pressing block 31.

The embodiment of the utility model provides a still provide a vibration test system, including above-mentioned test positioner. After the product to be tested is subjected to automatic positioning operation through the test positioning device, the vibration test system starts to simulate vibration and jolt so as to test the product to be tested.

In the embodiment of the disclosure, a product to be tested on the test position is positioned through the horizontal limiting structure and the lifting limiting structure, wherein the horizontal limiting operation and the lifting (vertical) limiting operation are automatically completed by utilizing the driving of the corresponding driving assembly, so that the automatic positioning operation of the product to be tested can be realized, the required time of the operation is short, and the positioning operation is simple.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A test positioning device is characterized by comprising a platform (1), a horizontal limiting structure (2) and a lifting limiting structure (3);

a first surface (11) of the platform (1) is provided with a test position for placing a product (4) to be tested;

the horizontal limiting structure (2) comprises a baffle (21), a movable support (22) and a first driving assembly (23), the first end of the movable support (22) is connected with the first driving assembly (23), the second end of the movable support is connected with the baffle (21), the baffle (21) is located on one side of the test position, and the baffle (21) is used for moving in the direction parallel to the first surface (11);

the lifting limiting structure (3) comprises a pressing block (31), a lifting support (32) and a second driving assembly (33), the first end of the lifting support (32) is connected with the second driving assembly (33), the second end of the lifting support is connected with the pressing block (31), the perpendicular projection of the pressing block (31) to the test position direction is at least partially overlapped with the test position, and the pressing block (31) is used for moving in the direction perpendicular to the first surface (11).

2. Test fixture according to claim 1, wherein the first surface (11) of the platform (1) is provided with a first recess (12), the bottom of the first recess (12) being a plane, and the test site being provided at the bottom of the first recess (12).

3. Test fixture device according to claim 2, wherein said baffle (21) is located in said first recess (12) and said baffle (21) comprises a pushing surface for pushing a product (4) to be tested;

the first driving assembly (23) comprises a first lead screw (231) and a first motor (232), a driving shaft of the first motor (232) is connected with the first lead screw (231) and is used for driving the first lead screw (231) to axially rotate, and an axis of the first lead screw (231) is parallel to the first surface (11);

the first end of the movable support (22) is in threaded connection with the first lead screw (231).

4. Test fixture according to claim 3, wherein said first lead screw (231) and said first motor (232) are located on a side of said platform (1) remote from said first surface (11);

second surface (13) of platform (1) are equipped with second recess (14), be equipped with on the lateral wall of second recess (14) with the communicating through-hole of first recess (12), movable support (22) include horizontal pole (221) and vertical pole (222), the first end of horizontal pole (221) is passed the through-hole with baffle (21) are connected, the second end of horizontal pole (221) with the first end of vertical pole (222) is connected, the second end of vertical pole (222) with first lead screw (231) threaded connection.

5. The test positioning device according to claim 4, wherein a support plate (34) is provided on the platform (1), the support plate (34) is parallel to the first surface (11) and has a predetermined distance from the first surface (11), and both ends of the support plate (34) are fixedly connected to the first surface (11);

the pressing block (31) comprises a pressing surface for pressing a product (4) to be measured, and the pressing block (31) is positioned between the supporting plate (34) and the first surface (11);

the second driving assembly (33) comprises a second lead screw (331) and a second motor (332), a driving shaft of the second motor (332) is connected with the second lead screw (331) and is used for driving the second lead screw (331) to axially rotate, the second motor (332) is connected with the supporting plate (34), and an axis of the second lead screw (331) is perpendicular to the supporting plate (34) and the first surface (11);

the lifting support (32) comprises a guide rail (321) and a lifting rod (322), the guide rail (321) is in threaded connection with the second lead screw (331), the first end of the lifting rod (322) is connected with the guide rail (321), and the second end of the lifting rod penetrates through the supporting plate (34) and is connected with the pressing block (31).

6. Test fixture according to claim 4, characterized in that it comprises a plurality of said horizontal limit structures (2);

the moving directions of the baffles (21) in the horizontal limiting structures (2) are different.

7. Test fixture according to any one of claims 3-6, wherein two test sites are arranged side by side in the first recess (12);

the first lead screw (231) comprises a driving lead screw (2311) and a driven lead screw (2312) which are arranged in parallel, a driving gear (2313) is arranged on the driving lead screw (2311), a driven gear (2314) meshed with the driving gear (2313) is arranged on the driven lead screw (2312), and the driving lead screw (2311) is connected with the first motor (232);

the driving lead screw (2311) and the driven lead screw (2312) are respectively connected with the baffle (21) through the moving bracket (22), and the moving directions of the baffle (21) driven by the driving lead screw (2311) and the baffle (21) driven by the driven lead screw (2312) are opposite.

8. The test positioning device according to claim 5, wherein the lifting support (32) comprises two lifting rods (322), the first end and the second end of the guide rail (321) are respectively connected with the two lifting rods (322), the middle part of the guide rail (321) is in threaded connection with the second lead screw (331), and the two lifting rods (322) are respectively connected with the pressing block (31).

9. The test positioning device according to claim 8, wherein a spacing plate (15) is arranged between the two test positions in the first groove (12), and a limiting plate (16) is arranged at the side end of the spacing plate (15) along the width direction of the spacing plate (15);

the width of the limiting plate (16) is larger than that of the spacing plate (15), and the limiting plate (16) is detachably connected with the spacing plate (15).

10. A vibration testing system comprising a test fixture as claimed in any one of claims 1 to 9.

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