positioning mechanism

Abstract

The application provides a positioning mechanism and relates to the technical field of workpiece detection. The positioning mechanism comprises a positioning base plate, a positioning assembly and an auxiliary assembly. The positioning assembly is fixedly arranged on the positioning base plate. The positioning assembly is provided with a positioning cavity for accommodating a workpiece. One side of the positioning cavity is provided with an auxiliary positioning gap. The auxiliary assembly comprises a telescopic driving element, an elastic element and a positioning head. The telescopic driving element is arranged on the positioning base plate in correspondence with the auxiliary positioning gap. The positioning head is connected to the output shaft of the telescopic driving element through the elastic element. The positioning head has a positioning state and an idle state. When the positioning head is in the positioning state, the positioning head extends into the positioning cavity from the positioning gap and abuts against the workpiece in the positioning cavity. The output shaft of the telescopic driving element extends out, so that the positioning head is switched from the idle state to the positioning state. The positioning mechanism guarantees the positioning effect of the workpiece, avoids damage to the workpiece during the positioning process, and has high applicability during positioning.

Description

Technical Field

[0001] This application relates to the field of workpiece inspection technology, and in particular to a positioning mechanism. Background Technology

[0002] In industrial production, ensuring the quality of workpieces is crucial, and defect detection is a key step in achieving this goal. During the detection process, to ensure the accuracy and reliability of the results, the workpiece is typically precisely positioned before inspection.

[0003] Existing positioning mechanisms mostly employ rigid positioning methods when positioning workpieces. While this method offers high positioning accuracy and stability, it is prone to damaging the workpiece during actual operation. For example, excessive clamping force can cause indentations and deformation on the workpiece surface. This damage can severely impact the quality and performance of workpieces with soft surfaces or high precision requirements. Furthermore, rigid positioning mechanisms have high requirements for adaptability to the shape and size of the workpiece. When the workpiece has an irregular shape or certain dimensional deviations, the positioning mechanism may fail to effectively clamp or fix the workpiece, leading to unstable positioning and affecting the accuracy of the detection results. Utility Model Content

[0004] Therefore, it is necessary to provide a positioning mechanism to address the above-mentioned technical problems. This positioning mechanism ensures the positioning effect of the workpiece while avoiding damage to the workpiece during the positioning process, and at the same time, it has strong applicability during positioning.

[0005] A positioning mechanism for positioning a workpiece to perform defect detection, the positioning mechanism comprising:

[0006] Positioning substrate;

[0007] A positioning component is fixedly disposed on the positioning base plate. The positioning component is provided with a positioning cavity for accommodating the workpiece, and an auxiliary positioning notch is provided on one side of the positioning cavity.

[0008] An auxiliary component includes a telescopic drive, an elastic element, and a positioning head. The telescopic drive is disposed on the positioning base plate corresponding to the auxiliary positioning notch, and the positioning head is connected to the output shaft of the telescopic drive through the elastic element.

[0009] The positioning head has a positioning state and an idle state. When the positioning head is in the positioning state, the positioning head extends from the positioning notch into the positioning cavity and abuts against the workpiece located in the positioning cavity. The output shaft of the telescopic drive extends to switch the positioning head from the idle state to the positioning state.

[0010] As a further technical solution, the auxiliary component also includes a first connecting block and a second connecting block;

[0011] The first connecting block is connected to the output shaft of the telescopic drive component, the first end of the second connecting block is configured as the positioning head, and the width of the positioning head is smaller than the width of the auxiliary positioning notch, and the elastic element is connected between the second ends of the first connecting block and the second connecting block.

[0012] As a further technical solution, the elastic element is configured as a compression spring, the first connecting block is provided with a first mounting groove on the side near the second connecting block, the second end of the second connecting block is provided with a second mounting groove, and the two ends of the compression spring are respectively connected to the first mounting groove and the second mounting groove.

[0013] As a further technical solution, the auxiliary component also includes a guide limiting member with a guide limiting channel. Along direction A, the guide limiting channel passes through the guide limiting member. The second end of the second connecting block is located at the first end of the guide limiting channel. The first connecting block is connected to the guide limiting member corresponding to the second end of the guide limiting channel.

[0014] As a further technical solution, the guide limiting member is provided with a snap-fit ​​groove at one end near the first connecting block, and the end of the first connecting block away from the telescopic drive member is snapped into the snap-fit ​​groove through a snap-fit ​​part.

[0015] As a further technical solution, the auxiliary component also includes an adjusting member. The second connecting block is configured as a long strip block. The side of the second connecting block near the positioning head is provided with a long strip guide hole. The long strip guide hole extends along the axial direction of the output shaft of the telescopic drive member. The guide limiting member is correspondingly provided with an auxiliary adjusting hole. The adjusting member passes through the auxiliary adjusting hole and is inserted into the long strip guide hole.

[0016] As a further technical solution, the auxiliary component also includes a first guide and a second guide. The guide limiting member is fixedly connected to the first guide, and the second guide is fixedly disposed on the positioning base plate. The first guide and the second guide slide in cooperation along the extension and retraction direction of the output shaft of the telescopic drive.

[0017] As a further technical solution, one of the lower end face of the first guide member and the upper end face of the second guide member is provided with a guide groove, and the other is provided with a guide rail that slides in cooperation with the guide groove, and the width of the bottom of the guide groove is greater than the width of the opening end of the guide groove.

[0018] As a further technical solution, a buffer portion is provided on the side of the positioning head away from the elastic member.

[0019] As a further technical solution, the positioning component includes a positioning base plate and four positioning elements. The four positioning elements are spaced apart on the upper surface of the positioning base plate. The four positioning elements cooperate with the positioning base plate to form a positioning cavity. The gap between the two positioning elements near the auxiliary component is used as the positioning notch.

[0020] The beneficial effects of the above positioning mechanism are as follows:

[0021] Because the positioning cavity has an auxiliary positioning notch, and the auxiliary components are correspondingly positioned on the positioning base plate, the positioning head is connected to the output shaft of the telescopic drive via an elastic element. Therefore, when the workpiece to be tested is placed in the positioning cavity, the telescopic drive is activated, causing its output shaft to extend. This allows the positioning head to extend from the positioning notch into the positioning cavity and abut against the workpiece, thus completing the positioning of the workpiece within the cavity. During workpiece positioning, when the positioning head abuts against the workpiece, the elastic element can adaptively extend and retract according to the specific specifications of the workpiece, ensuring rigid contact between the positioning head and the workpiece. This prevents damage to the workpiece and reduces the probability of damage during testing. Simultaneously, when the specifications of the workpiece change, it avoids the situation where the positioning head's extension into the positioning cavity remains consistent, preventing unstable positioning. In other words, through the adaptive extension and retraction of the elastic element, workpieces of different specifications can be positioned on the same positioning mechanism, ensuring positioning stability and accuracy of the test results, thereby improving the applicability of the positioning structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the positioning mechanism provided in the embodiments of this application;

[0024] Figure 2 A partial structural diagram of the positioning mechanism provided in the embodiments of this application. Figure 1 ;

[0025] Figure 3 A partial structural diagram of the positioning mechanism provided in the embodiments of this application. Figure 2 .

[0026] In the picture:

[0027] 10. Workpiece;

[0028] 100. Install the substrate;

[0029] 200. Positioning assembly; 210. Positioning base plate; 220. Positioning component;

[0030] 300, Auxiliary component; 310, Telescopic drive component; 320, Elastic component; 330, Positioning head; 340, First connecting block; 350, Second connecting block; 351, Long guide hole; 360, Adjusting component; 370, First guide component; 380, Second guide component; 390, Guide limit component. Detailed Implementation

[0031] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0032] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0033] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0034] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0035] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0036] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0037] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0038] Combination Figures 1 to 3As shown, the positioning mechanism provided in this embodiment is used to position the workpiece 10 to complete defect detection. The positioning mechanism ensures the positioning effect of the workpiece 10 while avoiding damage to the workpiece 10 during the positioning process. At the same time, it has strong applicability during positioning. Specifically, the positioning mechanism includes a mounting base plate 100, a positioning component 200, and an auxiliary component 300. The positioning component 200 is fixedly disposed on the mounting base plate 100 and has a positioning cavity for accommodating the workpiece 10. An auxiliary positioning notch is provided on one side of the positioning cavity. The auxiliary component 300 includes a telescopic drive member 310, an elastic member 320, and a positioning head 330. The telescopic drive member 310 is disposed on the mounting base plate 100 corresponding to the auxiliary positioning notch. The positioning head 330 is connected to the output shaft of the telescopic drive member 310 through the elastic member 320. The positioning head 330 has a positioning state and an idle state. When the positioning head 330 is in the positioning state, the positioning head 330 extends from the positioning notch into the positioning cavity and abuts against the workpiece 10 located in the positioning cavity. The output shaft of the telescopic drive member 310 extends out to switch the positioning head 330 from the idle state to the positioning state.

[0039] Because an auxiliary positioning notch is provided on the positioning cavity, the auxiliary component 300 is correspondingly disposed on the positioning base plate 210, and the positioning head 330 is connected to the output shaft of the telescopic drive component 310 through the elastic element 320. Therefore, when the workpiece 10 to be tested is placed in the positioning cavity, the telescopic drive component 310 is activated, so that the output shaft of the telescopic drive component 310 extends out, thereby the positioning head 330 extends from the positioning notch into the positioning cavity and abuts against the workpiece 10 located in the positioning cavity, thereby completing the positioning of the workpiece 10 in the positioning cavity. During the positioning of workpiece 10, when the positioning head 330 abuts against workpiece 10, the elastic element 320 can adaptively extend and retract according to the specific specifications of workpiece 10, thereby preventing the positioning head 330 from rigidly contacting workpiece 10 and avoiding damage to workpiece 10 by the positioning head 330, thus reducing the probability of damage to workpiece 10 during the inspection process. At the same time, when the specifications of the workpiece 10 to be inspected change, it avoids the situation where the positioning head 330 cannot be stably positioned because the extension amount into the positioning cavity is always consistent. That is, through the adaptive extension and retraction of the elastic element 320, workpieces 10 of different specifications can be positioned on the same positioning mechanism, and the positioning stability can be guaranteed to ensure the accuracy of the inspection results, thereby improving the applicability of the positioning structure during positioning.

[0040] After the workpiece 10 is inspected, the telescopic drive 310 is activated again to retract the output shaft of the telescopic drive 310, so that the positioning head 330 is switched from the positioning state to the idle state, thereby removing the positioning head 330 from the positioning cavity, so as to take out the current workpiece 10 and facilitate the placement of the next workpiece 10 to be inspected into the mounting cavity.

[0041] In order to further reduce the probability of damage to the workpiece 10 caused by the positioning head 330 during the positioning process, in this embodiment, a buffer part is provided on the side of the positioning head 330 away from the elastic member 320. The buffer part can be made of plastic or silicone, or the positioning head 330 can be made entirely of rubber or silicone; no specific limitation is made here.

[0042] Preferably, the auxiliary component 300 further includes a first connecting block 340 and a second connecting block 350; the first connecting block 340 is connected to the output shaft of the telescopic drive member 310, the first end of the second connecting block 350 is configured as a positioning head 330, and the width of the positioning head 330 is smaller than the width of the auxiliary positioning notch, and the elastic member 320 is connected between the second ends of the first connecting block 340 and the second connecting block 350.

[0043] By setting the first connecting block 340 and the second connecting block 350, the installation difficulty of the elastic element 320 connecting to the output shaft of the positioning head 330 and the telescopic drive element 310 is reduced, and the connection strength and connection stability are guaranteed, thereby ensuring the positioning effect and damage prevention effect of the positioning head 330 on the workpiece 10.

[0044] Preferably, the elastic element 320 is configured as a compression spring. When the positioning head 330 is in the positioning state, the compression spring is adaptively compressed to ensure the positioning effect and damage prevention effect on the workpiece 10. When the positioning head 330 releases the positioning of the workpiece 10, the positioning head 330 no longer abuts against the workpiece 10, the compression spring is no longer under force, and begins to rebound autonomously, thereby putting the positioning head 330 in an idle state so that the positioning head 330 can cooperate with the positioning cavity to perform the next positioning operation.

[0045] The first connecting block 340 is provided with a first mounting groove on the side near the second connecting block 350, and the second end of the second connecting block 350 is provided with a second mounting groove. The two ends of the compression spring are respectively connected to the first mounting groove and the second mounting groove, so as to further improve the connection strength and connection stability of the compression spring, and at the same time avoid the spring from bending during compression or rebound, thus ensuring the positioning effect of the positioning head 330.

[0046] In other embodiments, the elastic element 320 may also be made of rubber, nylon, shape memory alloy, etc., and is not limited to a compression spring.

[0047] Furthermore, the auxiliary component 300 also includes a guide limiting member 390 with a guide limiting channel. Along direction A, the guide limiting channel passes through the guide limiting member 390. The second end of the second connecting block 350 is located at the first end of the guide limiting channel. The first connecting block 340 is connected to the guide limiting member 390 corresponding to the second end of the guide limiting channel.

[0048] By setting up guide and limit channels, bending of the spring is prevented during compression or rebound, ensuring the positioning effect of the positioning head 330. Simultaneously, the guide spring extends and retracts along a predetermined path, ensuring the second connecting block 350 always moves along that path, further enhancing the positioning effect.

[0049] Preferably, the guide limiting member 390 is provided with a snap-fit ​​groove at one end near the first connecting block 340, and the end of the first connecting block 340 away from the telescopic drive member 310 is snapped into the snap-fit ​​groove through the snap-fit ​​part.

[0050] Combination Figure 3 As shown, in the direction from the guide limiting member 390 to the first connecting block 340, the snap-fit ​​groove is set as a "⊥" shaped groove, and the snap-fit ​​part is correspondingly set as a "⊥" shape. By snapping the snap-fit ​​part into the snap-fit ​​groove, the first connecting block 340 can be connected to the guide limiting member 390, ensuring the connection effect while improving the convenience of connection.

[0051] Preferably, the auxiliary component 300 further includes an adjusting member 360. The second connecting block 350 is configured as an elongated block, and an elongated guide hole 351 is provided on the side of the second connecting block 350 near the positioning head 330. The elongated guide hole 351 extends axially along the output shaft of the telescopic drive member 310. A corresponding auxiliary adjusting hole (not shown in the figure) is provided on the guide limiting member 390. The adjusting member 360 is inserted into the elongated guide hole 351 through the auxiliary adjusting hole. Through the cooperation of the elongated guide hole 351 and the adjusting member 360, during the compression or rebound of the compression spring, the second connecting block 350 is further guided to always move along the predetermined path, and relative rotation between the second connecting block 350 and the guide limiting channel is avoided.

[0052] Preferably, the auxiliary component 300 further includes a first guide 370 and a second guide 380, a guide limiting member 390 is fixedly connected to the first guide 370, and the second guide 380 is fixedly disposed on the positioning base plate 210. The first guide 370 and the second guide 380 slide in cooperation along the extension and retraction direction of the output shaft of the extension and retraction drive member 310.

[0053] When the output shaft of the telescopic drive 310 extends, it drives the first guide 370 to move closer to the positioning assembly 200, thereby causing the positioning head 330 to extend from the positioning notch into the positioning cavity and abut against the workpiece 10 located in the positioning cavity. During this period, the adaptive extension and contraction of the compression spring ensures the positioning effect of the workpiece 10 in the positioning cavity while avoiding damage to the workpiece 10. After the workpiece 10 is inspected, the telescopic drive 310 is activated again to retract the output shaft of the telescopic drive 310, thereby driving the first guide 370 to move away from the positioning assembly 200, thereby causing the positioning head 330 to withdraw from the positioning cavity. Throughout the process, the first guide 370 and the second guide 380 cooperate to guide the guide limit member 390, the second connecting block 350, the elastic member 320, and the positioning head 330 to always move along the predetermined path, thereby ensuring the positioning effect.

[0054] Preferably, one of the lower end face of the first guide member 370 and the upper end face of the second guide member 380 is provided with a guide groove, and the other is provided with a guide rail that slides in conjunction with the guide groove. To prevent the first guide member 370 and the second guide member 380 from separating from each other in the height direction, the width of the bottom of the guide groove is greater than the width of the opening end of the guide groove. That is, along the length direction of the guide groove, the cross-sectional shape of the guide groove is set as trapezoidal, dovetail, or "⊥" shaped, and the cross-sectional shape of the guide rail is correspondingly set to the guide groove.

[0055] In this embodiment, the positioning component 200 includes a positioning base plate 210 and four positioning members 220. The four positioning members 220 are spaced apart on the upper surface of the positioning base plate 210. The four positioning members 220 and the positioning base plate 210 cooperate with each other to form a positioning cavity. The gap between the two positioning members 220 near the auxiliary component 300 serves as a positioning notch. During the positioning process of the workpiece 10, in order to avoid damage to the workpiece 10 by the positioning members 220, a flexible buffer, such as a silicone layer or a rubber layer, is provided on the inner wall of the positioning member 220 near the positioning cavity. In other embodiments, the number of positioning members 220 can be increased or decreased according to actual needs, and is not limited to four in this embodiment.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A positioning mechanism for positioning a workpiece (10) to perform defect detection, characterized in that, The positioning mechanism includes: Mounting substrate (100); A positioning component (200) is fixedly disposed on the mounting base plate (100). The positioning component (200) is provided with a positioning cavity for accommodating the workpiece (10), and an auxiliary positioning notch is provided on one side of the positioning cavity. An auxiliary component (300) includes a telescopic drive (310), an elastic element (320), and a positioning head (330). The telescopic drive (310) is disposed on the mounting base (100) corresponding to the auxiliary positioning notch. The positioning head (330) is connected to the output shaft of the telescopic drive (310) through the elastic element (320). The positioning head (330) has a positioning state and an idle state. When the positioning head (330) is in the positioning state, the positioning head (330) extends from the positioning notch into the positioning cavity and abuts against the workpiece (10) located in the positioning cavity. The output shaft of the telescopic drive (310) extends out to switch the positioning head (330) from the idle state to the positioning state.

2. The positioning mechanism according to claim 1, characterized in that, The auxiliary component (300) further includes a first connecting block (340) and a second connecting block (350); The first connecting block (340) is connected to the output shaft of the telescopic drive (310), the first end of the second connecting block (350) is set as the positioning head (330), and the width of the positioning head (330) is smaller than the width of the auxiliary positioning notch. The elastic element (320) is connected between the second ends of the first connecting block (340) and the second connecting block (350).

3. The positioning mechanism according to claim 2, characterized in that, The elastic element (320) is configured as a compression spring. The first connecting block (340) is provided with a first mounting groove on the side near the second connecting block (350). The second end of the second connecting block (350) is provided with a second mounting groove. The two ends of the compression spring are respectively connected to the first mounting groove and the second mounting groove.

4. The positioning mechanism according to claim 2, characterized in that, The auxiliary component (300) further includes a guide limiting member (390) with a guide limiting channel. Along direction A, the guide limiting channel passes through the guide limiting member (390). The second end of the second connecting block (350) is located at the first end of the guide limiting channel. The first connecting block (340) is connected to the guide limiting member (390) corresponding to the second end of the guide limiting channel.

5. The positioning mechanism according to claim 4, characterized in that, The guide limiting member (390) has a snap-fit ​​groove at one end near the first connecting block (340), and the end of the first connecting block (340) opposite to the telescopic drive member (310) is snapped into the snap-fit ​​groove through the snap-fit ​​part.

6. The positioning mechanism according to claim 4, characterized in that, The auxiliary component (300) further includes an adjusting member (360). The second connecting block (350) is configured as a long strip block. The second connecting block (350) has a long guide hole (351) on the side near the positioning head (330). The long guide hole (351) extends axially along the output shaft of the telescopic drive member (310). The guide limit member (390) is correspondingly provided with an auxiliary adjusting hole. The adjusting member (360) passes through the auxiliary adjusting hole and is inserted into the long guide hole (351).

7. The positioning mechanism according to claim 4, characterized in that, The auxiliary component (300) further includes a first guide (370) and a second guide (380). The guide limiting member (390) is fixedly connected to the first guide (370), and the second guide (380) is fixedly disposed on the mounting base plate (100). The first guide (370) and the second guide (380) slide in cooperation along the extension and retraction direction of the output shaft of the telescopic drive member (310).

8. The positioning mechanism according to claim 7, characterized in that, Of the lower end face of the first guide member (370) and the upper end face of the second guide member (380), one is provided with a guide groove, and the other is provided with a guide rail that slides in cooperation with the guide groove, and the width of the bottom of the guide groove is greater than the width of the opening end of the guide groove.

9. The positioning mechanism according to claim 1, characterized in that, The positioning head (330) has a buffer section on the side opposite to the elastic member (320).

10. The positioning mechanism according to any one of claims 1-9, characterized in that, The positioning component (200) includes a positioning base plate (210) and four positioning members (220). The four positioning members (220) are spaced apart on the upper surface of the positioning base plate (210). The four positioning members (220) cooperate with the positioning base plate (210) to form a positioning cavity. The gap between the two positioning members (220) on the side closer to the auxiliary component (300) serves as the positioning notch.

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