Positioning module for locking screw of special-shaped sheet-shaped workpiece

Abstract

The positioning module comprises a positioning fork, an opening of the positioning fork faces downwards, the positioning fork comprises a body and two limiting blocks which are symmetrically arranged at the lower end of the body, the outward face of each limiting block is provided with a guiding inclined face and a first limiting face, and the guiding inclined faces and the first limiting faces are arranged in parallel. The first limiting face is connected with the upper end of the guide inclined face, the lower end of the guide inclined face is connected with the bottom faces of the limiting blocks, the faces, opposite to each other, of the two limiting blocks are second limiting faces, and the first limiting face and the second limiting faces are both vertical faces and are relatively perpendicular to each other. And vibration deviation of the shell workpiece can be avoided, the positioning accuracy and the installation stability can be effectively improved, the installation efficiency is improved, and the product yield is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of positioning modules, specifically relating to a positioning module for screwing screws onto irregularly shaped sheet-like workpieces. Background Technology

[0002] Existing irregularly shaped sheet workpieces, as a type of component with a special structure, are widely used in many fields such as electronics, electrical appliances, and automobiles. In this technology, the irregularly shaped sheet workpiece maintains an angle with the mounting surface of the bottom or side of the housing workpiece during installation. Its unique spatial position makes traditional planar positioning methods difficult to apply. Furthermore, the lower end of the irregularly shaped sheet workpiece is T-shaped, and its overall shape is irregular, which prevents it from fully fitting with the mounting surface and making effective positioning by itself with the mounting surface impossible. When installing locking screws, the irregularly shaped sheet workpiece needs to be inserted at an angle for fixation, which places extremely high demands on installation accuracy. Currently, the installation of such irregularly shaped sheet workpieces mostly adopts manual positioning installation or simple tooling assistance, resulting in inconsistent installation quality, difficulty in guaranteeing the yield rate, and poor positioning effect, which cannot meet the requirements of high-precision installation. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned problems by providing a positioning module for screwing irregularly shaped sheet workpieces, thereby solving the problems of poor positioning effect of existing screws on irregularly shaped sheet workpieces.

[0004] This utility model is achieved through the following technical solution: a positioning module for locking screws on irregularly shaped sheet-like workpieces, including a positioning fork with the opening facing downwards. The positioning fork includes a body and two limiting blocks symmetrically arranged at the lower end of the body. The outer side of each limiting block is provided with a guide slope and a first limiting surface. The first limiting surface is connected to the upper end of the guide slope, and the lower end of the guide slope is connected to the bottom surface of the limiting block. The side of the two limiting blocks facing each other is a second limiting surface. Both the first limiting surface and the second limiting surface are vertical surfaces and are arranged perpendicularly to each other.

[0005] Furthermore, it also includes a positioning carrier plate. The positioning fork is liftably positioned above the positioning carrier plate. The upper surface of the positioning carrier plate has several protrusions for positioning the housing workpiece. The positioning carrier plate is also movably provided with a lifting rod for positioning the middle part of the irregular piece workpiece. A screw mounting assembly that lifts and lowers synchronously with the positioning fork is fixed on the outside of the positioning fork. The screw mounting assembly is correspondingly positioned directly above the lifting rod. The top end of the lifting rod has an alignment groove for engaging the screw tip.

[0006] Furthermore, the upper end of the guide slope is lower than the lower end of the screw mounting assembly, and the screw mounting assembly is located at the outer part of the middle of the gap between the two second limiting surfaces.

[0007] Furthermore, the feature is that: two sets of lifting rods are symmetrically arranged on the positioning plate, and two sets of limiting blocks at the lower end of the positioning fork and screw mounting components on the outside are also provided corresponding to the position of the lifting rods.

[0008] Furthermore, the feature is that: two sets of limiting blocks are symmetrically provided on both sides of the lower end of the positioning fork, the first limiting surfaces of the two sets of limiting blocks face opposite directions, and the positioning fork is integrally formed.

[0009] Furthermore, the feature is that: a fixing plate is vertically fixed below the positioning carrier plate, a connecting plate is slidably installed on one side of the fixing plate, the lower end of the lifting rod is fixedly installed on the connecting plate, first connecting screws are screwed to both sides of the connecting plate, and second connecting screws are screwed to both sides of the positioning carrier plate above the first connecting screws, and a return spring is connected between the first connecting screws and the second connecting screws.

[0010] Furthermore, a limit nut is fixed at the position of the first connecting screw and the second connecting screw near the screwed end, and a nut is provided at the end relatively away from the screwed end.

[0011] This invention achieves precise, step-by-step positioning of the shell workpiece and the irregularly shaped workpiece by using the protrusions on the positioning plate, the lifting rod, and the limiting block at the lower end of the positioning fork in synergy. The guide slope of the limiting block can assist the irregularly shaped workpiece in automatically calibrating its position. At the same time, the alignment groove at the top of the lifting rod, in conjunction with the screw installation assembly, ensures precise guidance of the screw during installation. During installation, the limiting block can prevent the irregularly shaped workpiece from rotating and shifting, and also prevent the shell workpiece from vibrating and shifting, effectively improving positioning accuracy and installation stability, increasing installation efficiency, and ensuring product yield. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a partial three-dimensional view of the structure of this utility model;

[0014] Figure 3 This is a cross-sectional schematic diagram of the present invention in its working state.

[0015] The attached figures are labeled as follows:

[0016] 1. Positioning carrier plate; 11. Protrusion; 12. Lifting rod; 121. Alignment groove; 13. Fixing plate; 14. Connecting plate; 141. First connecting screw; 15. Second connecting screw; 16. Return spring; 17. Limiting nut; 18. Nut; 2. Positioning fork; 21. Body; 22. Limiting block; 221. Guide slope; 222. First limiting surface; 223. Second limiting surface; 3. Screw mounting assembly; 4. Irregularly shaped piece; 5. Housing piece. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to specific examples and accompanying drawings.

[0018] like Figures 1-3 As shown, this utility model describes a positioning module for locking screws on irregularly shaped sheet-like workpieces. It includes a positioning fork 2 with its opening facing downwards. The positioning fork 2 includes a body 21 and two limiting blocks 22 symmetrically arranged at the lower end of the body 21. The outward-facing side of each limiting block 22 has a guide slope 221 and a first limiting surface 222. The first limiting surface 222 connects to the upper end of the guide slope 221, and the lower end of the guide slope 221 connects to the bottom surface of the limiting block 22. The opposite side of the two limiting blocks 22 is a second limiting surface 223. Both the first limiting surface 222 and the second limiting surface 223 are vertical surfaces and are arranged perpendicularly to each other.

[0019] It also includes a positioning carrier plate 1. The positioning fork 2 is liftably mounted above the positioning carrier plate 1. The upper surface of the positioning carrier plate 1 is provided with a plurality of protrusions 11 for positioning the housing workpiece 5. The positioning carrier plate 1 is also movably mounted with a lifting rod 12 for positioning the middle part of the irregular piece workpiece 4. The outer side of the positioning fork 2 is fixed with a screw mounting assembly 3 that lifts and lowers synchronously with the positioning fork 2. The screw mounting assembly 3 is correspondingly mounted directly above the lifting rod 12. The top end of the lifting rod 12 is provided with an alignment groove 121 for engaging the screw tip.

[0020] Before starting work, the positioning fork 2 is held in an upward suspended state, and the lifting rod 12 is held in a state where it protrudes from the upper surface of the positioning carrier plate 1. During work, the shell workpiece 5 is first placed on the positioning carrier plate 1 by manual labor or a robotic arm through the protrusion 11. Then, the irregularly shaped workpiece 4 is placed on the lifting rod 12 in its approximate installation position to complete the initial positioning. Subsequently, the positioning fork 2 is lowered until the limiting block 22 at the lower end of the positioning fork 2 contacts the lower end of the irregularly shaped workpiece 4. Through the guide slope 221 at the lowermost end of the limiting block 22 and the guide contact with the lower end of the irregularly shaped workpiece 4, the irregularly shaped workpiece 4 is rotated around the lifting rod 12 to be calibrated to the accurate installation position until the lower end of the limiting block 22 abuts against the bottom inner surface of the shell workpiece 5. At this time, the two first limiting surfaces 222 are relatively locked on the lower surfaces of the two sides of the T-shaped head of the irregularly shaped workpiece 4, and the second limiting surface 223 is relatively locked on the two sides of the T-shaped tail of the irregularly shaped workpiece 4, forming a clamping state. Under the clamping and guiding action of the positioning fork 2, the lower end of the irregular piece workpiece 4 abuts against the inner bottom surface of the shell workpiece 5, and the upper end of the irregular piece workpiece 4 abuts against the inner side wall of the shell workpiece 5, forming a stable triangular structure, which completes the final positioning of the irregular piece workpiece 4. Then, the screw installation assembly 3 begins to release the screw for tightening. The lower tip of the screw abuts against the alignment groove 121 at the top of the lifting rod 12. As the screw installation assembly 3 descends to install the screw, the lifting rod 12 also descends synchronously until it is completely submerged in the upper surface of the positioning carrier plate 1. Thus, the screw to be installed can be accurately installed in the middle of the irregular piece workpiece 4 under the guidance of the lifting rod 12. During the screw installation process, the limiting block 22 abuts against two positions at the lower end of the irregular piece workpiece 4 to form a clamp to limit the rotation and displacement of the irregular piece workpiece 4. On the other hand, it presses against the shell workpiece 5 to prevent the shell workpiece 5 from vibrating and deviating. During the screw installation and tightening process, the whole remains stable and avoids deviation, resulting in high positioning accuracy.

[0021] In this embodiment of the invention, the upper end height of the guide slope 221 is lower than the lower end height of the screw mounting assembly 3. The screw mounting assembly 3 is located at the middle of the gap between the two second limiting surfaces 223, slightly to the outer side. By limiting the height difference between the guide slope 221 and the screw mounting assembly 3, interference between the screw mounting assembly 3 and the guide slope 221 during screw installation can be avoided. By setting the screw mounting assembly 3 at the middle of the gap between the second limiting surfaces 223, and in conjunction with the aforementioned height difference, the screw can be accurately aligned with the alignment groove 121 at the top of the lifting rod 12 during installation.

[0022] In this invention, two irregularly shaped workpieces 4 are symmetrically installed on the housing workpiece 5. To avoid large positioning accuracy errors caused by repeated installation and positioning, two sets of lifting rods 12 are symmetrically arranged on the positioning carrier plate 1 in this embodiment. The limiting block 22 at the lower end of the positioning fork 2 and the screw mounting assembly 3 on the outside are also provided in two sets corresponding to the position of the lifting rods 12. Through the corresponding cooperation between the two sets of lifting rods 12 and the middle of the irregularly shaped workpieces 4, the synchronous positioning of the two irregularly shaped workpieces 4 can be achieved, reducing the cumulative error caused by the repeated use of a single positioning structure. This symmetrical structural design makes the force uniform during the positioning and installation process, further enhancing the stability of the overall structure and reducing the product defect rate caused by installation errors.

[0023] In this embodiment of the utility model, two sets of limiting blocks 22 are symmetrically arranged on both sides of the lower end of the positioning fork 2. The first limiting surfaces 222 of the two sets of limiting blocks 22 face opposite directions. The positioning fork 2 is integrally formed. The integrally formed positioning fork 2 avoids the stress weak points that may occur in the splicing structure. With the two sets of symmetrically arranged limiting blocks 22, the positioning fork 2 is subjected to more balanced force during operation, effectively preventing deformation or displacement caused by uneven force, ensuring consistent positioning force for the two irregularly shaped workpieces 4, and further improving the installation accuracy.

[0024] In this embodiment of the invention, a fixing plate 13 is vertically fixed below the positioning carrier plate 1. A connecting plate 14 is slidably installed on one side of the fixing plate 13. The lower end of the lifting rod 12 is fixedly installed on the connecting plate 14. First connecting screws 141 are screwed to both sides of the connecting plate 14. Second connecting screws 15 are screwed to both sides of the positioning carrier plate 1 above the first connecting screws 141. A return spring 16 is connected between the first connecting screws 141 and the second connecting screws 15. When the screw mounting assembly 3 descends, the lifting rod 12 descends synchronously. The descent of the lifting rod 12 can be driven by the lower end of the screw mounting assembly 3 abutting against it or by a driving mechanism such as a lifting cylinder or motor. Driven by the mechanism, the connecting plate 14 and the lifting rod 12 descend synchronously. At this time, the first screw rods on both sides of the connecting plate 14 drive the return spring 16 to stretch and unfold. During this process, the return spring 16 generates a reverse tension, which can form an elastic constraint on the downward stroke of the lifting rod 12, avoiding damage to the workpiece or mispositioning due to excessive downward pressure. After the screw mounting assembly 3 completes the screw mounting action, it rises and the external force is removed. The return spring 16 relies on its own elastic recoil force to quickly drive the lifting rod 12 and the connecting plate 14 to return to their original position. This not only realizes the automatic return of the mechanism, but also effectively absorbs and buffers the vibration generated by mechanical movement through the cyclic action of stretching and resetting, further enhancing the stability and reliability of the positioning module during operation.

[0025] A further technical solution is that a limiting nut 17 is fixed at the position of the first connecting screw 141 and the second connecting screw 15 near the screwed end, and a nut 18 is provided at the end relatively away from the screwed end. The bidirectional constraint limiting is used to define the axial position of the return spring 16 and prevent the spring from moving or deviating along the screw during the stretching or compression process.

[0026] The above embodiments are merely preferred embodiments of the present utility model and are only used to explain the present utility model, not to limit the present utility model. Any changes, substitutions, combinations, simplifications, modifications, etc., made by those skilled in the art without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A positioning module for screwing screws onto irregularly shaped sheet-like workpieces, characterized in that: The device includes a positioning fork (2) with its opening facing downwards. The positioning fork (2) includes a body (21) and two limiting blocks (22) symmetrically arranged at the lower end of the body (21). The outer side of the limiting block (22) is provided with a guide slope (221) and a first limiting surface (222). The first limiting surface (222) is connected to the upper end of the guide slope (221), and the lower end of the guide slope (221) is connected to the bottom surface of the limiting block (22). The side of the two limiting blocks (22) facing each other is a second limiting surface (223). The first limiting surface (222) and the second limiting surface (223) are both vertical surfaces and are arranged perpendicularly to each other.

2. The positioning module for screwing irregularly shaped sheet-like workpieces according to claim 1, characterized in that: It also includes a positioning carrier plate (1), the positioning fork (2) is movably positioned above the positioning carrier plate (1), the upper surface of the positioning carrier plate (1) is provided with a plurality of protrusions (11) for positioning the housing workpiece (5), the positioning carrier plate (1) is also movably provided with a lifting rod (12) for positioning the middle part of the irregular piece workpiece (4), the outside of the positioning fork (2) is fixed with a screw mounting assembly (3) that moves synchronously with the positioning fork (2), the screw mounting assembly (3) is correspondingly positioned directly above the lifting rod (12), the top end of the lifting rod (12) is provided with an alignment groove (121) for engaging the screw tip.

3. The positioning module for screwing irregularly shaped sheet-like workpieces according to claim 2, characterized in that: The upper end of the guide slope (221) is lower than the lower end of the screw mounting assembly (3), and the screw mounting assembly (3) is located at the outer part of the middle of the gap between the two second limiting surfaces (223).

4. A positioning module for screwing irregularly shaped sheet-like workpieces according to claim 2, characterized in that: The lifting rod (12) is symmetrically arranged in two sets on the positioning plate (1). The limiting block (22) at the lower end of the positioning fork (2) and the screw mounting assembly (3) on the outside are also arranged in two sets corresponding to the position of the lifting rod (12).

5. A positioning module for screwing irregularly shaped sheet-like workpieces according to claim 4, characterized in that: The positioning fork (2) has two sets of limiting blocks (22) symmetrically arranged on both sides of its lower end. The first limiting surface (222) of the two sets of limiting blocks (22) faces opposite directions. The positioning fork (2) is integrally formed.

6. A positioning module for screwing screws onto irregularly shaped sheet-like workpieces according to claim 2, characterized in that: A fixing plate (13) is vertically fixed below the positioning carrier plate (1). A connecting plate (14) is slidably installed on one side of the fixing plate (13). The lower end of the lifting rod (12) is fixedly installed on the connecting plate (14). A first connecting screw (141) is screwed to both sides of the connecting plate (14). A second connecting screw (15) is screwed to both sides of the positioning carrier plate (1) above the first connecting screw (141). A return spring (16) is connected between the first connecting screw (141) and the second connecting screw (15).

7. A positioning module for screwing screws onto irregularly shaped sheet-like workpieces according to claim 6, characterized in that: A limit nut (17) is fixed at the position of the first connecting screw (141) and the second connecting screw (15) near the screwed end, and a nut (18) is provided at the end that is relatively far away from the screwed end.

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