Limiting device of automatic test jig

Abstract

The utility model provides a limiting device of an automatic test jig, which comprises a base, a pressing device, a driving device and a test fixture, a bottom plate is arranged above the base, a lower bottom plate is arranged above the bottom plate, the test fixture is arranged above the lower bottom plate, the driving device is connected with the pressing device, the pressing device comprises a fixing plate, a pressing driving cylinder and a pressing plate, and the fixing plate is connected with the pressing driving cylinder. The downward pressing driving cylinder is connected with the fixing plate and used for fixing the downward pressing driving cylinder, the driving end of the downward pressing driving cylinder is connected with the downward pressing plate and drives the downward pressing plate to move up and down, a limiting device is arranged on the side, away from the testing clamp, of the upper portion of the bottom plate and comprises a limiting plate and a limiting switch, the limiting plate and the limiting switch correspond in position, and the limiting plate is connected with the lower end of the downward pressing plate. And the limiting switch is connected with the bottom plate, when the downward-pressing driving air cylinder is pressed to a set position, the limiting plate makes contact with the limiting switch, a signal is sent to the controller, and the controller controls the downward-pressing driving air cylinder to stop downward pressing.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a limiting device for an automatic test fixture. Background Art

[0002] With the rapid development of information technology and the expansion of electronic product production, the function test of the PCB board by the test fixture is essential. As the test content and parameter complexity of the PCB board increase, the original test operation method requires a large number of test personnel, with low labor efficiency, low output, inconsistent operations, and the test quality cannot be guaranteed standardly.

[0003] The existing patent publication number: CN 216160770 U discloses a flip - cover double - sided needle - down test fixture. By the mutual cooperation of a base, an upper cover structure, a test fixture, a lower bottom plate structure, a fixed support structure, a code - reading device, a cam bearing device, and a gas spring device, the chip can be accurately and efficiently detected, thereby reducing production costs and the test results can be traced.

[0004] However, in the prior art, it is necessary for the operator to manually control the opening and closing of the upper cover structure and the test fixture. When manually controlling the downward pressing of the upper cover structure, the downward pressure is difficult to control, which is likely to damage the product, difficult to operate, the test quality cannot be guaranteed standardly, it is time - consuming and laborious, and the labor efficiency is low. Summary of the Utility Model

[0005] Therefore, to solve the above problems, the present utility model proposes a limiting device for an automated testing jig, which includes a base 10, a downward pressing device 20, a driving device 30, and a testing fixture 40. A bottom plate 50 is provided above the base 10, and a lower bottom plate 60 is provided above the bottom plate 50. The testing fixture 40 is placed above the lower bottom plate 60. The driving device 30 is connected to the downward pressing device 20. The downward pressing device 20 includes a fixing plate 201, a downward pressing driving cylinder 202, and a lower pressing plate 203. The downward pressing driving cylinder 202 is connected to the fixing plate 201 for fixing the downward pressing driving cylinder 202. The driving end of the downward pressing driving cylinder 202 is connected to the lower pressing plate 203 to drive the lower pressing plate 203 to move up and down. A limiting device 70 is provided on one side of the bottom plate 50 away from the testing fixture 40. The limiting device 70 includes a limiting plate 701 and a limit switch 702 which are corresponding in position. The limiting plate 701 is connected to the lower end of the lower pressing plate 203, and the limit switch 702 is connected to the bottom plate 50. When the downward pressing driving cylinder 202 presses down to a set position, the limiting plate 701 contacts the limit switch 702 and sends a signal to the controller, and the controller controls the downward pressing driving cylinder 202 to stop pressing down. Due to the setting of the limiting device 70, the downward pressing stroke of the lower pressing plate is controlled by the downward pressing driving cylinder 202, which is convenient for the operator to operate, not easy to damage the product, and improves the testing efficiency and testing accuracy rate.

[0006] A limiting device for an automated testing jig includes a base 10, a downward pressing device 20, a driving device 30, and a testing fixture 40. A bottom plate 50 is provided above the base 10, and a lower bottom plate 60 is provided above the bottom plate 50. The testing fixture 40 is placed above the lower bottom plate 60. The driving device 30 is connected to the downward pressing device 20. The downward pressing device 20 includes a fixing plate 201, a downward pressing driving cylinder 202, and a lower pressing plate 203. The downward pressing driving cylinder 202 is connected to the fixing plate 201 for fixing the downward pressing driving cylinder 202. The driving end of the downward pressing driving cylinder 202 is connected to the lower pressing plate 203 to drive the lower pressing plate 203 to move up and down. A limiting device 70 is provided on one side of the bottom plate 50 away from the testing fixture 40. The limiting device 70 includes a limiting plate 701 and a limit switch 702 which are corresponding in position. The limiting plate 701 is connected to the lower end of the lower pressing plate 203, and the limit switch 702 is connected to the bottom plate 50. When the downward pressing driving cylinder 202 presses down to a set position, the limiting plate 701 contacts the limit switch 702 and sends a signal to the controller, and the controller controls the downward pressing driving cylinder 202 to stop pressing down.

[0007] Further, the driving device 30 includes a driving motor 301, a hexagonal shaft 302, a synchronous belt 303, and a synchronous pulley 304. The driving end of the driving motor 301 is connected to the synchronous pulley 304 through the synchronous belt 303. The hexagonal shaft 302 passes through the synchronous pulley 304, and rotating shaft members 80 and rotating shaft seats 90 are provided at both ends of the hexagonal shaft 302. The rotating shaft member 80 is connected to the pressing device 20, and the rotating shaft seat 90 is connected to the bottom plate 50. When the pressing device 20 presses down, the driving motor 301 drives the synchronous pulley 304 to rotate through the synchronous belt 303, so that the pressing device 20 closes downward. After the pressing stroke ends, the driving motor 301 drives the pressing device 20 to reset upward.

[0008] Further, a first bracket 100 is connected to the extension block at the lower end of the fixing plate 201. A first sensor 120 is provided on the lower surface of the bottom plate 50. When the driving motor 301 drives the fixing plate 201 to reset upward, the first bracket 100 flips together with the fixing plate 201. When the first bracket 100 contacts the first sensor 120, the driving motor 301 stops pressing down. At this time, the angle of the fixing plate 201 is 90 degrees.

[0009] Further, a second bracket 110 is provided on one side of the fixing plate 201. The second bracket 110 is connected to the bottom plate 50. A second sensor 130 is connected to the upper end of the second bracket 110. When the driving motor 301 drives the fixing plate 201 to press down, the first bracket 100 flips together with the fixing plate 201. When the first bracket 100 contacts the second sensor 130, the driving motor 301 stops pressing down. At this time, the pressing angle of the fixing plate 201 is 0 degrees.

[0010] Further, a waist-shaped hole 140 is provided at the upper end of the second bracket 110 to facilitate the up and down fine adjustment of the second sensor 130.

[0011] Further, a plurality of pressing block assemblies 150 are provided on the lower pressing plate 203. Grooves 160 matching the positions of the pressing block assemblies 150 are provided on the test fixture 40. When the pressing block assemblies 150 press down, the pressing block assemblies 150 are clamped with the grooves 160.

[0012] Furthermore, the pressing block assembly 150 includes a pressing cover 1501 and a pressing block 1502. The pressing cover 1501 is connected to the lower pressing plate 203. The pressing block 1502 can move up and down. A spring is provided inside the pressing block assembly 150. One end of the spring is connected to the pressing cover 1501, and the other end is connected to the pressing block 1502. When the lower pressing plate 203 moves downward, the pressing block 1502 moves upward to buffer the pressure during downward pressing and avoid damaging the product.

[0013] Furthermore, limit screws 170 are provided on the left and right sides of the lower surface of the lower pressing plate 203. When the lower pressing plate 203 moves downward, the bottom ends of the limit screws 170 contact the lower bottom plate 60. Since the products to be detected have different thicknesses, when it is necessary to adjust the height of the lower pressing plate 203, the height stroke of the lower pressing plate 203 can be adjusted by rotating the limit screws 170.

[0014] Furthermore, positioning pins 180 are provided on the left and right sides of the lower surface of the lower pressing plate 203, and positioning holes 190 matching the positioning pins 180 are provided on the lower bottom plate 60, which are used to position the lower pressing plate 203 relative to the test fixture 40 when the lower pressing plate 203 moves downward to avoid errors.

[0015] The beneficial effects of the present utility model: The present utility model provides a limiting device for an automatic testing jig, which includes a base 10, a downward pressing device 20, a driving device 30, and a test fixture 40. A bottom plate 50 is provided above the base 10, and a lower bottom plate 60 is provided above the bottom plate 50. The test fixture 40 is placed above the lower bottom plate 60. The driving device 30 is connected to the downward pressing device 20. The downward pressing device 20 includes a fixing plate 201, a downward pressing driving cylinder 202, and a lower pressing plate 203. The downward pressing driving cylinder 202 is connected to the fixing plate 201 to fix the downward pressing driving cylinder 202. The driving end of the downward pressing driving cylinder 202 is connected to the lower pressing plate 203 to drive the lower pressing plate 203 to move up and down. A limiting device 70 is provided on one side of the bottom plate 50 away from the test fixture 40. The limiting device 70 includes a limiting plate 701 and a limit switch 702 which are correspondingly positioned. The limiting plate 701 is connected to the lower end of the lower pressing plate 203, and the limit switch 702 is connected to the bottom plate 50. When the downward pressing driving cylinder 202 presses down to a set position, the limiting plate 701 contacts the limit switch 702 and sends a signal to the controller, and the controller controls the downward pressing driving cylinder 202 to stop pressing down. Due to the setting of the limiting device 70, the downward pressing driving cylinder 202 controls the downward pressing stroke of the lower pressing plate, which is convenient for the operator to operate, not easy to damage the product, and improves the test efficiency and test accuracy. Description of the Drawings

[0016] Figure 1 This is the open state of the overall schematic diagram of the limiting device of an automatic test fixture of the present utility model.

[0017] Figure 2 This is the closed state of the overall schematic diagram of the limiting device of an automatic test fixture of the present utility model.

[0018] Figure 3 This is the partial structural schematic diagram of the limiting device of an automatic test fixture of the present utility model.

[0019] Figure 4 This is the partial structural schematic diagram of the limiting device of an automatic test fixture of the present utility model.

[0020] Figure 5 This is the partial enlarged view of the limiting device of an automatic test fixture of the present utility model.

[0021] Main element symbol description:

[0022] Base 10, downward pressing device 20, fixing plate 201, downward pressing driving cylinder 202, lower pressing plate 203, driving device 30, driving motor 301, hexagonal shaft 302, synchronous belt 303, synchronous pulley 304, test fixture 40, bottom plate 50, lower bottom plate 60, limiting device 70, limiting plate 701, limit switch 702, rotating shaft member 80, rotating shaft seat 90, first bracket 100, second bracket 110, first sensor 120, second sensor 130, waist-shaped hole 140, pressing block assembly 150, pressing cover 1501, pressing block 1502, groove 160, limiting screw 170, positioning pin 180, positioning hole 190. Specific implementation manners

[0023] The following embodiments are described to assist in understanding the present application, and the embodiments are not and should not in any way be construed as limiting the protection scope of the present application.

[0024] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components, or may be integrated together (including being integrated within a single system or component).

[0025] At the same time, the connections between components or systems are not intended to be limited to direct connections. Instead, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled", "connected", or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0026] As shown Figure 1 in the figure, it is the open state of the overall schematic diagram of the limit device of an automatic test fixture of the present utility model; as Figure 2 shown in the figure, it is the closed state of the overall schematic diagram of the limit device of an automatic test fixture of the present utility model; as Figure 3 shown in the figure, it is the partial structural schematic diagram of the limit device of an automatic test fixture of the present utility model; as Figure 4 shown in the figure, it is the partial structural schematic diagram of the limit device of an automatic test fixture of the present utility model; as Figure 5 shown in the figure, it is the partial enlarged view of the limit device of an automatic test fixture of the present utility model.

[0027] A limit device of an automatic test fixture includes a base 10, a downward pressing device 20, a driving device 30, and a test fixture 40. A bottom plate 50 is provided above the base 10, and a lower bottom plate 60 is provided above the bottom plate 50. The test fixture 40 is placed above the lower bottom plate 60. The driving device 30 is connected to the downward pressing device 20. The downward pressing device 20 includes a fixing plate 201, a downward pressing driving cylinder 202, and a lower pressing plate 203. The downward pressing driving cylinder 202 is connected to the fixing plate 201 for fixing the downward pressing driving cylinder 202. The driving end of the downward pressing driving cylinder 202 is connected to the lower pressing plate 203 to drive the lower pressing plate 203 to move up and down. A limit device 70 is provided on one side of the bottom plate 50 away from the test fixture 40. The limit device 70 includes a limit plate 701 and a limit switch 702 which are corresponding in position. The limit plate 701 is connected to the lower end of the lower pressing plate 203, and the limit switch 702 is connected to the bottom plate 50. When the downward pressing driving cylinder 202 presses down to a set position, the limit plate 701 contacts the limit switch 702 and sends a signal to the controller, and the controller controls the downward pressing driving cylinder 202 to stop pressing down.

[0028] The driving device 30 includes a driving motor 301, a hexagonal shaft 302, a synchronous belt 303, and a synchronous pulley 304. The driving end of the driving motor 301 is connected to the synchronous pulley 304 through the synchronous belt 303. The hexagonal shaft 302 passes through the synchronous pulley 304, and rotating shafts 80 and rotating shaft seats 90 are provided at both ends of the hexagonal shaft 302. The rotating shaft 80 is connected to the downward pressing device 20, and the rotating shaft seat 90 is connected to the bottom plate 50. When the downward pressing device 20 presses down, the driving motor 301 drives the synchronous pulley 304 to rotate through the synchronous belt 303, so that the downward pressing device 20 closes downward. After the downward pressing stroke ends, the driving motor 301 drives the downward pressing device 20 to reset upward.

[0029] A first bracket 100 is connected to the extension block at the lower end of the fixed plate 201. A first sensor 120 is provided on the lower surface of the bottom plate 50. When the driving motor 301 drives the fixed plate 201 to reset upward, the first bracket 100 flips together with the fixed plate 201. When the first bracket 100 contacts the first sensor 120, the driving motor 301 stops pressing down. At this time, the angle of the fixed plate 201 is 90 degrees.

[0030] A second bracket 110 is provided on one side of the fixed plate 201. The second bracket 110 is connected to the bottom plate 50. A second sensor 130 is connected to the upper end of the second bracket 110. When the driving motor 301 drives the fixed plate 201 to press down, the first bracket 100 flips together with the fixed plate 201. When the first bracket 100 contacts the second sensor 130, the driving motor 301 stops pressing down. At this time, the pressing-down angle of the fixed plate 201 is 0 degrees.

[0031] A waist-shaped hole 140 is provided at the upper end of the second bracket 110 to facilitate the up-and-down fine adjustment of the second sensor 130.

[0032] A plurality of pressing block assemblies 150 are provided on the lower pressing plate 203. Grooves 160 matching the positions of the pressing block assemblies 150 are provided on the test fixture 40. When the pressing block assemblies 150 press down, the pressing block assemblies 150 are clamped with the grooves 160.

[0033] The pressing block assembly 150 includes a pressing cover 1501 and a pressing block 1502. The pressing cover 1501 is connected to the lower pressing plate 203. The pressing block 1502 can move up and down. A spring is provided inside the pressing block assembly 150. One end of the spring is connected to the pressing cover 1501, and the other end is connected to the pressing block 1502. When the lower pressing plate 203 presses down, the pressing block 1502 moves upward to buffer the pressure during pressing down and avoid damaging the product.

[0034] Limit screws 170 are provided on the left and right sides of the lower surface of the lower pressing plate 203. When the lower pressing plate 203 presses down, the bottom ends of the limit screws 170 contact the lower bottom plate 60. Since the products to be detected have different thicknesses, when it is necessary to adjust the height of the lower pressing plate 203, the height stroke of the lower pressing plate 203 can be adjusted by rotating the limit screws 170.

[0035] Positioning pins 180 are provided on the left and right sides of the lower surface of the lower pressing plate 203. Positioning holes 190 matching the positioning pins 180 are provided on the lower bottom plate 60 to ensure the position of the lower pressing plate 203 relative to the test fixture 40 when the lower pressing plate 203 presses down and avoid errors.

[0036] Advantages of the present utility model: The present utility model provides a limiting device for an automated test fixture, which includes a base 10, a downward pressing device 20, a driving device 30, and a test fixture 40. A bottom plate 50 is provided above the base 10, and a lower bottom plate 60 is provided above the bottom plate 50. The test fixture 40 is placed above the lower bottom plate 60. The driving device 30 is connected to the downward pressing device 20. The downward pressing device 20 includes a fixing plate 201, a downward pressing driving cylinder 202, and a lower pressing plate 203. The downward pressing driving cylinder 202 is connected to the fixing plate 201 for fixing the downward pressing driving cylinder 202. The driving end of the downward pressing driving cylinder 202 is connected to the lower pressing plate 203 to drive the lower pressing plate 203 to move up and down. A limiting device 70 is provided on one side of the bottom plate 50 away from the test fixture 40. The limiting device 70 includes a limiting plate 701 and a limit switch 702 which are corresponding in position. The limiting plate 701 is connected to the lower end of the lower pressing plate 203, and the limit switch 702 is connected to the bottom plate 50. When the downward pressing driving cylinder 202 presses down to a set position, the limiting plate 701 contacts the limit switch 702 and sends a signal to the controller, and the controller controls the downward pressing driving cylinder 202 to stop pressing down. Due to the setting of the limiting device 70, the downward pressing stroke of the lower pressing plate is controlled by the downward pressing driving cylinder 202, which is convenient for the operator to operate and not easy to damage the product, improving the test efficiency and test accuracy.

[0037] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A limiting device for an automated test fixture, comprising a base (10), a pressing device (20), a driving device (30), and a test fixture (40), wherein a bottom plate (50) is provided above the base (10), a lower bottom plate (60) is provided above the bottom plate (50), the test fixture (40) is placed above the lower bottom plate (60), the driving device (30) is connected to the pressing device (20), the pressing device (20) comprises a fixed plate (201), a pressing driving cylinder (202), and a lower pressing plate (203), the pressing driving cylinder (202) is connected to the fixed plate (201) for fixing the pressing driving cylinder (202), the driving end of the pressing driving cylinder (202) is connected to the lower pressing plate (203), and drives the lower pressing plate (203) to move up and down, characterized in that: A limit device (70) is provided on a side above the base plate (50) away from the test fixture (40), the limit device (70) comprising a limit plate (701) and a limit switch (702) which are positioned correspondingly, the limit plate (701) being connected to the lower end of the lower pressing plate (203), the limit switch (702) being connected to the base plate (50), and when the downward pressing driving cylinder (202) is pressed down to a set position, the limit plate (701) contacts the limit switch (702), and the downward pressing driving cylinder (202) stops pressing down.

2. The position limiting device for the automated testing jig according to claim 1, characterized in that: The driving device (30) comprises a driving motor (301), a hexagonal shaft (302), a synchronous belt (303) and a synchronous wheel (304); the driving end of the driving motor (301) is connected to the synchronous wheel (304) via the synchronous belt (303); the hexagonal shaft (302) passes through the synchronous wheel (304); and both ends of the hexagonal shaft (302) are provided with a rotating shaft member (80) and a rotating shaft seat (90); the rotating shaft member (80) is connected to the pressing device (20); and the rotating shaft seat (90) is connected to the bottom plate (50); when the pressing device (20) is pressed downward, the driving motor (301) drives the synchronous wheel (304) to rotate via the synchronous belt (303), so that the pressing device (20) is closed downward; after the pressing stroke is completed, the driving motor (301) drives the pressing device (20) to reset upward.

3. The position limiting device for the automated testing jig according to claim 2, characterized in that: A first bracket (100) is connected to the extension block at the lower end of the fixing plate (201), and a first sensor (120) is provided on the lower surface of the bottom plate (50); when the driving motor (301) drives the fixing plate (201) to reset upward, the first bracket (100) flips together with the fixing plate (201); when the first bracket (100) contacts the first sensor (120), the driving motor (301) stops pressing downward, and at this time, the angle of the fixing plate (201) is 90 degrees.

4. The position limiting device for the automated testing jig according to claim 3 is characterized in that: A second bracket (110) is provided on one side of the fixing plate (201), the second bracket (110) being connected to the bottom plate (50), the upper end of the second bracket (110) being connected to a second sensor (130), when the driving motor (301) drives the fixing plate (201) to be pressed downward, the first bracket (100) turns over together with the fixing plate (201), and when the first bracket (100) contacts the second sensor (130), the driving motor (301) stops pressing downward, and at this time, the pressing angle of the fixing plate (201) is 0 degrees.

5. The position limiting device for the automated testing jig according to claim 4, characterized in that: A waist-shaped hole (140) is provided at the upper end of the second bracket (110) to facilitate fine adjustment of the second sensor (130) up and down.

6. The position limiting device for the automated testing jig according to claim 1, characterized in that: A plurality of pressing block assemblies (150) are provided on the lower pressing plate (203), and a groove (160) matching the position of the pressing block assemblies (150) is provided on the test fixture (40); when the pressing block assemblies (150) are pressed downward, the pressing block assemblies (150) are engaged with the grooves (160).

7. The position limiting device for the automated testing jig according to claim 6, characterized in that: The pressing block assembly (150) comprises a pressing cover (1501) and a pressing block (1502), wherein the pressing cover (1501) is connected to the lower pressing plate (203), and the pressing block (1502) can move up and down. A spring is provided in the pressing block assembly (150), wherein one end of the spring is connected to the pressing cover (1501), and the other end is connected to the pressing block (1502). When the lower pressing plate (203) is pressed down, the pressing block (1502) moves upward to buffer the pressure during pressing down and avoid damage to the product.

8. The position limiting device for the automated testing jig according to claim 1, characterized in that: Limit screws (170) are provided on the left and right sides of the lower surface of the lower pressing plate (203). When the lower pressing plate (203) is pressed down, the bottom end of the limit screw (170) contacts the lower base plate (60). Since the inspected products have different thicknesses, when it is necessary to adjust the height of the lower pressing plate (203), the height stroke of the lower pressing plate (203) can be adjusted by rotating the limit screw (170).

9. The position limiting device for the automated testing jig according to claim 8, characterized in that: Positioning pins (180) are provided on the left and right sides of the lower surface of the lower pressing plate (203), and positioning holes (190) matching the positioning pins (180) are provided on the lower base plate (60) for adjusting the position of the lower pressing plate (203) with the test fixture (40) when the lower pressing plate (203) is pressed downward to avoid errors.

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