Probe assembly driving structure

Abstract

The utility model relates to the technical field of probe machines, and provides a probe assembly driving structure which comprises a base frame used for installing a probe assembly and a driving piece used for driving the base frame to rotate, and the base frame is provided with a driving assembly used for driving the probe assembly to move up and down in the direction of the rotation axis of the base frame. The driving assembly comprises a linear motor and a guiding component. The driving structure further comprises a feedback assembly. The linear motor is matched with the guide part to drive the probe assembly to move up and down in the rotation axis direction of the base frame, and the feedback assembly is combined to feed back the height position of the probe assembly in the rotation axis direction of the base frame in real time, so that the accurate control of the up-down movement position of the probe assembly in the rotation axis direction of the base frame is realized. The linear motor direct drive structure mode is adopted, dynamic response is fast, the application requirements for high-speed movement and frequent start and stop are met, noise is low when the linear motor operates, and noise interference in the testing process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of probe machine technology, specifically a probe component driving structure. Background Technology

[0002] In the electronics manufacturing industry, probe machines are an important testing device widely used for insulation and continuity testing of printed circuit boards to ensure that the electrical connection performance of the circuit boards meets design requirements.

[0003] Currently, in probe machine designs, the movement of probe components in the direction of approaching / moving away from the PCB board generally adopts a stepper motor and synchronous belt drive. First, the accuracy of synchronous belt transmission is greatly affected by manufacturing quality (including the appearance quality, tooth profile, length stability, etc. of the synchronous belt). The actual accuracy of synchronous belt transmission is also affected by the accuracy of the timing pulley it is paired with. If the stepper motor is not properly controlled, it is easy for the stepper motor to lose steps or overstep, resulting in a decrease in positional accuracy. Second, the speed of the stepper motor is limited by its working principle and it is difficult to operate at high speeds. When operating at high speeds, the stepper motor is prone to vibration and noise, affecting the stability of the system. Finally, in order to improve testing efficiency, the industry drives the probe components in the direction of approaching / moving away from the PCB board at a high frequency, which requires high dynamic response from the drive system, and the stepper drive system is difficult to meet this performance requirement.

[0004] Therefore, this invention proposes a probe component driving structure to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a probe component driving structure to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A probe assembly driving structure includes a base frame for mounting the probe assembly and a driving component for driving the base frame to rotate. The base frame is provided with a driving component for driving the probe assembly to move up and down along the rotation axis of the base frame. The driving component includes a linear motor and a guide component that cooperates with the linear motor to realize the up and down movement of the probe assembly along the rotation axis of the base frame. The driving structure also includes a feedback component for real-time feedback of the height position of the probe assembly in the rotation axis direction of the base frame.

[0008] In one alternative: the guiding component includes a guide rail mounted on a base frame, a slider slidably mounted on the guide rail, and a connecting seat. The slider and the mover of the linear motor are both fixedly connected to the connecting seat. The connecting seat is provided with a cantilever bracket, and the probe assembly is located at the end of the cantilever bracket away from the connecting seat.

[0009] In one alternative: the cantilever support is made of carbon fiber.

[0010] In one alternative: an upper optocoupler and a lower optocoupler are arranged at intervals along a direction parallel to the rotation axis of the base frame, the distance between the upper optocoupler and the lower optocoupler is not greater than the length of the guide rail, the connecting seat is also provided with a sensing sheet that cooperates with the upper optocoupler and the lower optocoupler, and the two ends of the guide rail are also provided with limiting blocks to prevent the slider from slipping off.

[0011] In one alternative: the driving component is a DD motor.

[0012] In one alternative: the feedback component includes a grating ruler disposed on the base frame and arranged in a direction parallel to the rotation axis of the base frame, and a reading head disposed on the connecting seat and cooperating with the grating ruler.

[0013] Compared with the prior art, the beneficial effects of this utility model embodiment are as follows:

[0014] The probe assembly is driven to move up and down along the rotation axis of the base frame by a linear motor and a guide component. The height position of the probe assembly along the rotation axis of the base frame is fed back in real time by a feedback component. This achieves precise control of the up and down movement of the probe assembly along the rotation axis of the base frame. The linear motor direct drive structure provides fast dynamic response, meets the requirements of high-speed movement and frequent start and stop applications, and the linear motor operates with low noise, reducing noise interference during testing.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0017] Figure 1 This is a front view of an embodiment of the present utility model.

[0018] Figure 2 This is a side view of an embodiment of the present utility model.

[0019] Figure 3 for Figure 2 Sectional view along the EE direction.

[0020] Figure 4 This is a rear view of an embodiment of the present utility model.

[0021] Figure reference numerals: 1-Base frame, 2-Driver, 3-Probe assembly, 4-Drive assembly, 401-Linear motor, 402-Connector, 403-Cantilever bracket, 404-Slider, 405-Guide rail, 406-Limit block, 407-Upper optocoupler, 408-Lower optocoupler, 409-Sensing sheet, 5-Camera assembly, 6-Feedback assembly, 601-Grating ruler, 602-Reading head. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Please see Figures 1-3 A probe assembly driving structure includes a base frame 1 for mounting the probe assembly and a driving component 2 for driving the base frame 1 to rotate. The base frame 1 is provided with a driving component 4 for driving the probe assembly to move up and down (i.e., closer to / away from the PCB board) along the rotation axis of the base frame 1. The driving component 4 includes a linear motor 401 and a guide component that cooperates with the linear motor 401 to realize the up and down movement of the probe assembly along the rotation axis of the base frame 1. The driving structure also includes a feedback component 6 for real-time feedback of the height position of the probe assembly in the rotation axis direction of the base frame 1.

[0024] It should be noted that the driving structure is located on the probe machine test bracket, and the test bracket is driven by an external driving mechanism in the X and Y axis directions, thereby driving the probe assembly to move accordingly to perform the test action; the base frame 1 is also used to install the camera assembly, which is used to capture PCB board image data in real time, and after analysis in the background, it provides support for high-precision alignment between the probe and the test point. All of the above are existing technologies and will not be described in detail here.

[0025] The probe assembly is driven to move up and down along the rotation axis of the base frame 1 by a linear motor 401 and a guide component. The height position of the probe assembly along the rotation axis of the base frame 1 is fed back in real time by the feedback component 6. This achieves precise control of the up and down movement of the probe assembly along the rotation axis of the base frame 1. The direct drive structure of the linear motor 401 provides a fast dynamic response, meeting the requirements of high-speed movement and frequent start-stop applications. In addition, the linear motor 401 operates with low noise, reducing noise interference during testing.

[0026] Furthermore, the driving component 2 is a DD motor.

[0027] Please see Figures 1-4In one embodiment of this utility model, the guiding component includes a guide rail 405 disposed on the base frame 1, a slider 404 slidably mounted on the guide rail 405, and a connecting seat 402 (in an L-shape). The slider 404 and the mover of the linear motor 401 are both fixedly connected to the connecting seat 402. A cantilever bracket 403 is provided on the connecting seat 402. The probe assembly is disposed at the end of the cantilever bracket 403 away from the connecting seat 402. The linear motor 401 drives the connecting seat 402 to move in the direction of the rotation axis of the base frame 1, thereby driving the probe assembly to move up and down in the direction of the rotation axis of the base frame 1 accordingly.

[0028] Furthermore, in this embodiment, the cantilever bracket 403 is made of carbon fiber, and it is a high-rigidity carbon fiber that is lightweight yet possesses high strength, reducing the impact of vibration and deformation during movement on the measurement.

[0029] Furthermore, in this embodiment, an upper optocoupler 407 and a lower optocoupler 408 are arranged at intervals along a direction parallel to the rotation axis of the base frame 1. The distance between the upper optocoupler 407 and the lower optocoupler 408 is not greater than the length of the guide rail 405. The connecting seat 402 is also provided with a sensing plate 409 that cooperates with the upper optocoupler 407 and the lower optocoupler 408. The upper optocoupler 407 and the lower optocoupler 408 are triggered by the sensing plate 409 to control the movement range of the drive probe assembly in the direction of the rotation axis of the base frame 1. Limiting blocks 406 are also provided at both ends of the guide rail 405 to prevent the slider 404 from slipping.

[0030] Please see Figure 3 In one embodiment of this utility model, the feedback component 6 includes a grating ruler 601 disposed on the base frame 1 and arranged in a direction parallel to the rotation axis of the base frame 1, and a reading head 602 disposed on the connecting seat 402 and working in cooperation with the grating ruler 601. When the connecting seat 402 moves, it drives the reading head 602 to move accordingly. By cooperating with the grating ruler 601 and the reading head 602, the position of the probe component in the rotation axis direction of the base frame 1 is accurately fed back, ensuring that the movement position of the probe component is controlled with relatively high precision during actual testing.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A probe assembly driving structure, comprising a base frame (1) for mounting a probe assembly and a driving component (2) for driving the base frame (1) to rotate, wherein the base frame (1) is provided with a driving component (4) for driving the probe assembly to move up and down along the rotation axis of the base frame (1), characterized in that, The drive assembly (4) includes a linear motor (401) and a guide component that works with the linear motor (401) to move the probe assembly up and down along the rotation axis of the base frame (1). The drive structure also includes a feedback component (6) for real-time feedback of the height position of the probe assembly in the rotation axis of the base frame (1).

2. The probe assembly driving structure according to claim 1, characterized in that, The guiding component includes a guide rail (405) mounted on the base frame (1), a slider (404) slidably mounted on the guide rail (405), and a connecting seat (402). The slider (404) and the mover of the linear motor (401) are both fixedly connected to the connecting seat (402). The connecting seat (402) is provided with a cantilever bracket (403), and the probe assembly is located at the end of the cantilever bracket (403) away from the connecting seat (402).

3. The probe assembly driving structure according to claim 2, characterized in that, The cantilever bracket (403) is made of carbon fiber.

4. The probe assembly driving structure according to claim 2, characterized in that, The base frame (1) is provided with an upper optocoupler (407) and a lower optocoupler (408) arranged at intervals along the direction parallel to the rotation axis of the base frame (1). The distance between the upper optocoupler (407) and the lower optocoupler (408) is not greater than the length of the guide rail (405). The connecting seat (402) is also provided with a sensing plate (409) that cooperates with the upper optocoupler (407) and the lower optocoupler (408). The guide rail (405) is also provided with limiting blocks (406) at both ends to prevent the slider (404) from slipping.

5. The probe assembly driving structure according to claim 1, characterized in that, The driving component (2) is a DD motor.

6. The probe assembly driving structure according to claim 2, characterized in that, The feedback component (6) includes a grating ruler (601) disposed on the base frame (1) and arranged parallel to the rotation axis of the base frame (1), and a reading head (602) disposed on the connecting seat (402) and working in conjunction with the grating ruler (601).

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