CNC (computer numerical control) universal fixture for photovoltaic accessories

Abstract

The utility model provides a photovoltaic fitting CNC universal fixture, which relates to the technical field of photovoltaic fitting production, and comprises a CNC positioning substrate, a clamping base is arranged on the CNC positioning substrate, a plurality of groups of clamping modules with different shapes are arranged in parallel in the clamping base, the plurality of groups of clamping modules are arranged in a staggered manner, two sides of each clamping module are respectively provided with a quick-change plate assembly, and the quick-change plate assemblies are arranged on the clamping base. Wherein a limiting plate is arranged on one side of one quick-change plate assembly, a cam clamping mechanism is arranged between the limiting plate and the adjacent quick-change plate assembly, the limiting plate and the two quick-change plate assemblies are connected through connecting rods, telescopic springs are arranged on the connecting rods, and guide columns are arranged on the sides, close to the quick-change plate assemblies, of the clamping modules. The clamping device has the advantages that through the horizontally-arranged reset spring, the guide column, three-gear adjustment of the quick-change plate assembly and the force amplification effect of the cam clamping mechanism, quick switching clamping of photovoltaic accessories in various shapes is achieved, the machining precision is guaranteed through the self-centering design, and the efficient and precise machining requirement of a CNC machine tool is met.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of photovoltaic accessory production, and particularly relates to a CNC universal fixture for photovoltaic accessories. Background Art

[0002] In the photovoltaic industry, CNC machining is a key process for photovoltaic accessories (such as bracket connectors, cell frames, etc.), and it is necessary to clamp workpieces with different shapes with high precision. Most traditional CNC fixtures are of special design and customized for single-shaped workpieces, and have the following defects: When changing the processed workpiece, the fixture needs to be disassembled and replaced as a whole, which is time-consuming and laborious, and cannot meet the production requirements of multi-variety and small-batch, and the versatility is insufficient; The asymmetric clamping structure is likely to cause uneven stress on the workpiece, resulting in displacement or deformation during the processing, affecting the dimensional accuracy, large positional tolerance error, and unstable clamping accuracy; The customized clamping parts of the special fixture are difficult to replace, and local wear requires the whole to be scrapped, increasing the tool cost of the enterprise.

[0003] The inventor found the following defects during the specific implementation process:

[0004] Although the existing universal fixtures have certain adjustment functions, most of them rely on manual knobs or bolts to adjust one by one, with low adjustment efficiency and poor positioning consistency, and cannot meet the high-precision processing requirements of photovoltaic accessories. Therefore, a universal fixture with fast changeover, self-centering clamping and high-precision positioning is needed to solve the problems of poor fixture adaptability, cumbersome operation and insufficient precision in the CNC machining of photovoltaic accessories.

[0005] It should be noted that the above content belongs to the technical cognition scope of the inventor. Due to the vast and extremely complex technical content in this field, the above content of this application does not necessarily constitute the prior art. Summary of the Utility Model

[0006] 1. Technical problems to be solved by the utility model:

[0007] The utility model provides a CNC universal fixture for photovoltaic accessories to solve the technical problems existing in the above background art.

[0008] 2. Technical solutions:

[0009] To achieve the above object, the technical solution provided by the present utility model is: a CNC universal fixture for photovoltaic accessories, including a CNC positioning substrate, a clamping base is provided on the CNC positioning substrate, a plurality of clamping modules with different shapes are arranged in parallel in the clamping base, and the plurality of clamping modules are arranged in a staggered manner. Quick-change plate assemblies are provided on both sides of the clamping module. A limiting plate is provided on one side of one of the quick-change plate assemblies, and a cam clamping mechanism is provided between the limiting plate and the adjacent quick-change plate assembly. The limiting plate and the two quick-change plate assemblies are connected by a connecting rod, a telescopic spring is provided on the connecting rod, a guiding column is provided on the side of the clamping module close to the quick-change plate assembly, and a return spring embedded in the clamping base is provided at the lower end of the clamping module.

[0010] Further, the plurality of clamping modules include a first clamping block assembly, a second clamping block assembly and a third clamping block assembly. There is a certain gap between the first clamping block assembly, the second clamping block assembly and the third clamping block assembly, and they are all embedded in the clamping base.

[0011] Further, the quick-change plate assembly includes a sliding seat slidably connected to both sides of the clamping base. A quick-change plate is embedded at the upper end of the sliding seat. An adjusting block is further provided on one side of the sliding seat. A plurality of adjusting holes are provided in the adjusting block, and positioning pins are provided in the adjusting holes.

[0012] Further, the quick-change plate is slidably connected to the sliding seat. A plurality of programming holes corresponding to the guiding columns are provided on the quick-change plate. The programming holes are through holes, and limiting holes corresponding to the adjusting holes are further provided at the upper end of the quick-change plate.

[0013] Further, through holes corresponding to the connecting rod are provided on the limiting plate, and locking nuts are provided at both ends of the through holes. A pushing and pulling groove is further provided on the limiting plate.

[0014] Further, the cam clamping mechanism includes a rotating shaft connected to the clamping base. A cam member is fixedly provided at the upper end of the rotating shaft. A rotating handle is further provided on the outer peripheral wall of the rotating shaft, and the rotating handle penetrates through the pushing and pulling groove.

[0015] Further, the connecting rod penetrates through the limiting plate and the two quick-change plate assemblies, and is fixed at both ends. The telescopic spring is sleeved on the connecting rod and is located between the two quick-change plate assemblies.

[0016] Further, a receiving groove is provided in the clamping base, and a partition plate matching the plurality of clamping modules is provided in the receiving groove.

[0017] 3. Beneficial effects:

[0018] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0019] Through the cooperation of three groups of clamping modules with different shapes and the programming holes of the quick-change plate assembly, the clamping modes of photovoltaic accessories such as flat-edge type, arc type, and multi-sided type can be quickly switched without replacing the overall fixture, significantly improving the tool-changing efficiency of CNC machining;

[0020] The linkage design of the horizontal return spring and the guide post, combined with the self-centering function of the cam clamping mechanism, enables the clamping force to be symmetrically distributed on both sides of the workpiece, ensuring the positioning accuracy of the workpiece during the machining process and effectively avoiding the problem of workpiece deformation caused by uneven clamping force of traditional fixtures;

[0021] The modular structure design realizes the independent replacement and maintenance of the clamping module, reducing the overall loss rate of the fixture. The three-stage adjustment mechanism is quickly locked by the positioning pin, and combined with the force amplification effect of the cam clamping, it simplifies the operation process, meets the high-efficiency and precision machining requirements of multi-variety and small-batch photovoltaic accessories, and significantly reduces the machining cost.

[0022] It should be noted that the structures not introduced in the present utility model are the same as the prior art or can be implemented by the prior art because they do not involve the design key points and improvement directions of the present utility model, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structure schematic diagram of the present utility model;

[0024] Figure 2 is the partial structure schematic diagram of the present utility model;

[0025] Figure 3 is another partial structure schematic diagram of the present utility model;

[0026] Figure 4 is the structure schematic diagram of the clamping module of the present utility model;

[0027] Figure 5 is the structure schematic diagram of the quick-change plate assembly of the present utility model;

[0028] Figure 6 is the structure schematic diagram of the clamping base of the present utility model;

[0029] Figure 7 is the corresponding schematic diagram of the guide post and the programming hole of the present utility model.

[0030] Reference Signs:

[0031] 1. CNC positioning substrate; 2. Clamping base; 201. Accommodating groove; 202. Partition board; 3. Clamping module; 301. First clamping block assembly; 302. Second clamping block assembly; 303. Third clamping block assembly; 4. Quick-change board assembly; 401. Sliding seat; 402. Quick-change board; 4021. Programming hole; 4022. Limiting hole; 403. Adjusting block; 4031. Adjusting hole position; 4032. Positioning pin; 5. Limiting plate; 501. Pushing and pulling groove; 6. Cam clamping mechanism; 601. Rotating shaft; 602. Cam part; 603. Turning handle; 7. Connecting rod; 8. Telescopic spring; 9. Guide post; 10. Return spring. Detailed implementation manners

[0032] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant attached drawings. Several embodiments of the present utility model are given in the attached drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", "provided with", "provided in", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Embodiment

[0036] Refer to the attached Figure 1-7 , a CNC universal fixture for photovoltaic accessories, including a CNC positioning substrate 1. A clamping base 2 is provided on the CNC positioning substrate 1. A plurality of sets of clamping modules 3 with different shapes are arranged in parallel in the clamping base 2. The plurality of sets of clamping modules 3 are arranged in a staggered manner. Quick-change plate assemblies 4 are provided on both sides of the clamping module 3. A limiting plate 5 is provided on one side of one of the quick-change plate assemblies 4. A cam clamping mechanism 6 is provided between the limiting plate 5 and the adjacent quick-change plate assembly 4. The limiting plate 5 and the two quick-change plate assemblies 4 are connected by a connecting rod 7. A telescopic spring 8 is provided on the connecting rod 7. A guide post 9 is provided on the side of the clamping module 3 close to the quick-change plate assembly 4. A return spring 10 embedded in the clamping base 2 is provided at the lower end of the clamping module 3.

[0037] Clamping base and module layout: The CNC positioning substrate 1 is used to be fixedly connected to the workbench surface of the CNC machine tool by bolts. The upper surface of the CNC positioning substrate 1 is fixedly connected with a clamping base 2 by countersunk head bolts. A rectangular receiving groove 201 is opened inside the clamping base 2. The receiving groove 201 is divided into twelve independent chambers by a plurality of partition plates 202 welded vertically, corresponding to six groups of clamping blocks, arranged in two rows and six columns in a staggered manner. A clamping module 3 is embedded in each chamber, including a first clamping block assembly 301, a second clamping block assembly 302, and a third clamping block assembly 303. Each group includes two sets of mirror-image clamping blocks, for a total of six groups of clamping blocks;

[0038] The multiple sets of clamping modules 3 include a first clamping block assembly 301, a second clamping block assembly 302, and a third clamping block assembly 303. There is a certain gap between the first clamping block assembly 301, the second clamping block assembly 302, and the third clamping block assembly 303, and they are all embedded in the clamping base 2. The first clamping block assembly 301, the second clamping block assembly 302, and the third clamping block assembly 303 respectively correspond to three different clamping profiles, and can quickly switch and clamp various shapes of photovoltaic accessories, such as flat-edge type, arc type, polygonal type and other photovoltaic accessories.

[0039] Return spring and guide post structure: A guide post 9 is horizontally fixed on the outer side wall of each group of clamping modules 3. The guide post 9 is coaxially corresponding to the programming hole 4021 of the quick-change plate assembly 4. A return spring 10 is horizontally arranged between the clamping module 3 and the side wall of the receiving groove 201. One end of the return spring 10 is fixedly embedded on the outside of the clamping module 3, and the other end is welded and fixed to the side wall inside the receiving groove 201, so that the clamping module 3 remains reset outward and away from the workpiece center in the non-working state.

[0040] Quick-change plate assembly and adjustment mechanism:

[0041] The quick-change plate assembly 4 includes sliding seats 401 slidably connected to both sides of the clamping base 2. A quick-change plate 402 is embedded at the upper end of the sliding seat 401. An adjusting block 403 is further provided on one side of the sliding seat 401. A plurality of adjusting holes 4031 are formed in the adjusting block 403. A positioning pin 4032 is provided in the adjusting hole 4031. The quick-change plate 402 is slidably connected to the sliding seat 401. A plurality of groups of programming holes 4021 corresponding to the guide posts 9 are formed in the quick-change plate 402. The programming holes 4021 are through holes. A limiting hole 4022 corresponding to the adjusting hole 4031 is further formed at the upper end of the quick-change plate 402; Quick-change plate assemblies 4 are symmetrically provided on the left and right sides of the clamping base 2. The sliding direction of each group of quick-change plate assemblies 4 is parallel to the axis of the guide post 9. Three groups of programming holes 4021 are formed through the quick-change plate 402. Each group of programming holes 4021 includes four through holes, corresponding to four of the six guide posts 9. The three groups of programming holes 4021 are arranged along the length direction of the quick-change plate 402, and the spacing of each group is the same as the spacing of the adjusting holes 4031;

[0042] When the quick-change plate 402 is in the first gear position, only the two guide posts 9 of the first clamping block assembly 301 (corresponding to the two unopened positions of the first group of programming holes 4021) cannot pass through the programming holes 4021 and are blocked by the solid part of the quick-change plate 402. The remaining four guide posts 9 (corresponding to the second clamping block assembly 302 and the third clamping block assembly 303) can pass through the programming holes 4021; Similarly, in the second gear position and the third gear position of the quick-change plate 402, two guide posts 9 of the second clamping block assembly 302 and the third clamping block assembly 303 are blocked respectively, and the remaining four guide posts 9 pass through the programming holes 4021;

[0043] Reference Figure 7 Shown in the schematic diagram of the correspondence between the guide post and the programming hole, the position of the programming hole 4021 shown as "1" corresponds to the ejection of the first clamping block assembly 301, the position of the programming hole 4021 shown as "2" corresponds to the ejection of the second clamping block assembly 302, and the position of the programming hole 4021 shown as "3" corresponds to the ejection of the third clamping block assembly 303. The direction indicated by the arrow in the figure is the sliding direction of the quick-change plate 402 when switching gears from 1 to 3;

[0044] An adjusting block 403 is fixedly connected to the outside of the sliding seat 401. Three adjusting holes 4031 are formed in the adjusting block 403 along the sliding direction. After the positioning pin 4032 is inserted into the limiting hole 4022 on the upper end face of the quick-change plate 402, the quick-change plate 402 can be locked in three positions: the first gear (corresponding to the first clamping block assembly 301), the second gear (corresponding to the second clamping block assembly 302), and the third gear (the third clamping block assembly 303).

[0045] Clamping mechanism and linkage structure:

[0046] The limiting plate 5 is provided with through holes corresponding to the connecting rod 7, and locking nuts are provided at both ends of the through holes. The connecting rod 7 passes through the sliding seats 401 of the quick-change plate assemblies 4 on the left and right sides, and a telescopic spring 8 is sleeved between the two sliding seats 401 for the reset of the quick-change plate assembly 4.

[0047] A push-pull groove 501 is provided at the middle position of the limiting plate 5. The push-pull groove 501 is a horizontally arranged long-strip through groove. A rotating handle 603 of the cam clamping mechanism 6 is inserted into the push-pull groove 501. The upper end of the rotating shaft 601 is fixedly connected with a cam member 602 by a flat key. When the rotating handle 603 is rotated to drive the cam member 602 to rotate, the outer contour of the cam pushes the limiting plate 5 to move axially along the connecting rod 7.

[0048] In this embodiment, the operation logic is as follows:

[0049] Clamping module switching: According to the shape of the processed photovoltaic accessories (such as flat-edge type, arc type, polygon type), select the corresponding clamping module 3. If it is necessary to use the first clamping block assembly 301 (suitable for polygonal workpieces), push the quick-change plate 402 along the sliding seat 401 towards the adjusting block 403, so that the limiting hole 4022 of the quick-change plate 402 is aligned with the first adjusting hole position 4031 of the adjusting block 403, and insert the positioning pin 4032 to lock. At this time, only the two guide columns 9 of the first clamping block assembly 301 are blocked by the solid part of the quick-change plate 402, and the other four guide columns pass through the programming hole 4021.

[0050] Clamping action execution: Rotate the rotating handle 603 clockwise, and the outer contour of the cam member 602 pushes the limiting plate 5 to move to the right. The limiting plate 5 drives the sliding seats 401 of the quick-change plate assemblies 4 on the left and right sides to move synchronously towards the middle through the connecting rod 7. At this time, the telescopic spring 8 is compressed. When the quick-change plate 402 moves with the sliding seat 401, the solid part without holes thereof exerts a horizontal thrust on the two blocked guide columns 9, and the thrust direction points to the center of the workpiece, pushing the first clamping block assembly 301 to move inwards and finally contacting the workpiece to achieve clamping.

[0051] Self-centering clamping: The quick-change plate assemblies 4 on the left and right sides move synchronously through the same connecting rod 7, and each group of pushed clamping modules 3 are symmetrically distributed on both sides of the workpiece. Therefore, the clamping forces act symmetrically on both sides of the workpiece to achieve the self-centering function.

[0052] Clamping and resetting: Rotate the rotating handle 603 counterclockwise, the cam member 602 releases the thrust on the limiting plate 5, and the telescopic spring 8 releases the elastic potential energy to push the left and right sliding seats 401 to reset outwards; at the same time, the reset spring 10 outside the clamping module 3 releases the elastic potential energy, pushing the clamped clamping module 3 to fall back outwards, and the guide column 9 is separated from the quick-change plate 402 to complete the clamping and resetting action.

[0053] In summary, through the horizontally arranged return spring, the three-stage adjustment of the guide post and the quick-change plate assembly, and the force amplification effect of the cam clamping mechanism, the quick switching and clamping of photovoltaic accessories of various shapes are realized. The self-centering design ensures the machining accuracy and meets the high-efficiency and precision machining requirements of CNC machine tools.

[0054] The above-described embodiments merely represent certain implementation manners of the present invention, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A CNC general fixture for photovoltaic accessories, comprising a CNC positioning base plate (1), characterized in that: A clamping base (2) is provided on the CNC positioning substrate (1). A plurality of groups of clamping modules (3) with different shapes are arranged in parallel in the clamping base (2). The plurality of groups of clamping modules (3) are arranged in a staggered manner. Quick-change plate assemblies (4) are provided on both sides of the clamping module (3). A limiting plate (5) is provided on one side of one of the quick-change plate assemblies (4). A cam clamping mechanism (6) is provided between the limiting plate (5) and the adjacent quick-change plate assembly (4). The limiting plate (5) and the two quick-change plate assemblies (4) are connected by a connecting rod (7). A telescopic spring (8) is provided on the connecting rod (7). A guiding column (9) is provided on the side of the clamping module (3) close to the quick-change plate assembly (4). A reset spring (10) is provided at the lower end of the clamping module (3) and is embedded in the clamping base (2).

2. The CNC general fixture for a photovoltaic accessory according to claim 1, wherein: The plurality of groups of clamping modules (3) include a first clamping block assembly (301), a second clamping block assembly (302), and a third clamping block assembly (303). There is a certain gap between the first clamping block assembly (301), the second clamping block assembly (302), and the third clamping block assembly (303), and they are all embedded in the clamping base (2).

3. A CNC general fixture for a photovoltaic accessory according to claim 1, characterized in that: The quick-change plate assembly (4) includes a sliding seat (401) slidably connected to both sides of the clamping base (2). A quick-change plate (402) is embedded at the upper end of the sliding seat (401). An adjusting block (403) is further provided on one side of the sliding seat (401). A plurality of adjusting holes (4031) are provided in the adjusting block (403), and a positioning pin (4032) is provided in the adjusting holes (4031).

4. The CNC general fixture for a photovoltaic accessory according to claim 3, characterized in that: The quick-change plate (402) is slidably connected to the sliding seat (401). A plurality of groups of programming holes (4021) corresponding to the guiding columns (9) are provided on the quick-change plate (402). The programming holes (4021) are through holes. A limiting hole (4022) corresponding to the adjusting holes (4031) is further provided at the upper end of the quick-change plate (402).

5. A CNC general fixture for photovoltaic accessories according to claim 1, characterized in that: Through holes corresponding to the connecting rod (7) are provided on the limiting plate (5), and locking nuts are provided at both ends of the through holes. A pushing and pulling groove (501) is further provided on the limiting plate (5).

6. A CNC general fixture for a photovoltaic accessory according to claim 5, characterized in that: The cam clamping mechanism (6) includes a rotating shaft (601) connected to the clamping base (2). A cam member (602) is fixedly provided at the upper end of the rotating shaft (601). A rotating handle (603) is further provided on the outer peripheral wall of the rotating shaft (601), and the rotating handle (603) penetrates through the pushing and pulling groove (501).

7. A general CNC fixture for photovoltaic accessories according to claim 1, characterized in that: The connecting rod (7) penetrates through the limiting plate (5) and the two quick-change plate assemblies (4), and both ends are fixed. The telescopic spring (8) is sleeved on the connecting rod (7) and is located between the two quick-change plate assemblies (4).

8. A CNC general fixture for a photovoltaic accessory according to claim 1, characterized in that: A receiving groove (201) is provided in the clamping base (2), and a partition plate (202) matching the plurality of groups of clamping modules (3) is provided in the receiving groove (201).

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