High-precision clamping jaw mechanism

Abstract

The utility model provides a high-precision clamping jaw mechanism, and relates to the field of clamping tools. The high-precision clamping jaw mechanism comprises a driving device, an upper clamping assembly and a lower clamping assembly. The driving device comprises a special-shaped ball screw shaft and two screw nuts; the special-shaped ball screw shaft is provided with two sections of threads which are opposite in direction and symmetrical, the two screw nuts are in threaded connection with the two sections of threads respectively, and the two screw nuts are also symmetrically placed with the symmetry point of the two sections of threads as the symmetry point. The upper clamping assembly and the lower clamping assembly each comprise a strip-shaped connecting piece and a plurality of clamping jaw structures, and the multiple clamping jaw structures are evenly arranged on the connecting piece in the length direction of the connecting piece. The two connecting pieces are arranged side by side up and down; the multiple clamping jaw structures of the upper clamping assembly and the multiple clamping jaw structures of the lower clamping assembly are adjacently arranged in a one-to-one correspondence mode to jointly form a clamping mechanism capable of being used for clamping.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping workpieces, in particular to a high-precision jaw mechanism. Background Art

[0002] Photovoltaic modules can generate electricity only after the welding tapes are welded and encapsulated with the solar cells. The welding effect between the welding tapes and the main grid lines of the solar cells determines the quality of the products. This is a key core process in the production process of photovoltaic modules. Only when they completely coincide can the subsequent welding quality and power generation capacity be ensured.

[0003] Existing welding machines use fully automatic operation to complete the grasping, traction, and placement of the welding tapes. First, the jaw mechanism is used to grasp the welding tapes, and then the welding tapes are placed on the solar cells through the traction mechanism to complete the stacking operation. The grasping mechanism plays an extremely important role in this process. Traditional welding tape grasping mechanisms mostly use single-acting jaw mechanisms to clamp the welding tapes, and the jaws are mostly fixed structures. The drawbacks of this design cannot meet the accurate capture of the welding tapes. The single-acting gripper drives the welding tape to move at the moment of touching the welding tape, and the resulting deviation directly causes the welding tape to deviate from the main grid of the solar cell, ultimately leading to product degradation and scrapping. The fixed jaw design can only meet solar cells with specific shapes and cannot be compatible with solar cells of various sizes and screen shapes, resulting in great cost waste.

[0004] Based on this, the utility model provides a high-precision jaw mechanism to solve the above technical problems. Content of the Utility Model

[0005] The utility model provides a high-precision jaw mechanism, which is realized through the following technical solutions:

[0006] Based on the above first object, the utility model provides a high-precision jaw mechanism, including a driving device, an upper clamping assembly, and a lower clamping assembly;

[0007] The driving device includes a special-shaped ball screw shaft and two screw nuts; two sections of threads with opposite directions and symmetry are arranged on the special-shaped ball screw shaft, and the two screw nuts are respectively screwed with the two sections of threads;

[0008] Both the upper clamping assembly and the lower clamping assembly include strip-shaped connecting pieces and a plurality of jaw structures. The plurality of jaw structures are uniformly arranged on the connecting piece along the length direction of the connecting piece; the two connecting pieces are arranged side by side up and down; the plurality of jaw structures of the upper clamping assembly and the plurality of jaw structures of the lower clamping assembly are respectively arranged adjacent to each other in one-to-one correspondence to jointly form a clamping mechanism that can be used for clamping.

[0009] In some embodiments of the utility model, a fixed frame is further included, and the driving device is installed in the fixed frame;

[0010] An upper end of one of the lead screw nuts is provided with a protruding upper connecting portion, and the upper connecting portion extends out of the fixed frame and is connected to an inner side surface of the upper connecting member.

[0011] A lower end of the other lead screw nut is also provided with a protruding lower connecting portion, and the lower connecting portion extends out of the fixed frame and is connected to an inner side surface of the lower connecting member.

[0012] In some embodiments of the present utility model, a slide rail is provided on the fixed frame, and both of the lead screw nuts are slidably connected to the slide rail.

[0013] In some embodiments of the present utility model, the connecting member is detachably connected to a plurality of the jaw structures; the jaw structure includes a screwing member and a jaw.

[0014] The screwing member includes a bolt and a nut, the bolt penetrates through upper and lower side surfaces of the connecting member and is screwed to the nut; a jack is provided on a rod portion of the bolt.

[0015] In some embodiments of the present utility model, the jaw includes a clamping foot, a clamping arm and a clamping hand;

[0016] The clamping foot penetrates through an outer side surface of the connecting member and is inserted into the jack of the bolt.

[0017] The clamping arm is arranged vertically downward, and an upper end of the clamping arm is fixedly connected to the clamping foot.

[0018] The clamping hand is located on a side surface of the clamping arm, and a length of the jaw of the upper clamping assembly is longer than a length of the jaw of the lower clamping assembly; when strokes of the two lead screw nuts are zero, end faces of two adjacent clamping hands are in abutment.

[0019] In some embodiments of the present utility model, an end face of the clamping hand is inclined at 45 degrees.

[0020] In some embodiments of the present utility model, the driving device further includes a servo motor; the servo motor drives the special-shaped ball screw shaft to rotate.

[0021] For the high-precision jaw mechanism provided by the present utility model, the power system is an important point of this design. Compared with the traditional single-arm movement clamping, in this design, by matching the special-shaped ball screw shaft with two lead screw nuts, two moving arms can be driven to move in a precise and non-deviating reverse manner simultaneously, so as to ensure that the jaws do not shift during the process from contacting the welding tape to completely clamping the welding tape.

[0022] The key point of this design is the special-shaped ball screw shaft. The grooved thread on the screw shaft is designed as a symmetric reverse structure. When the screw shaft rotates, the two screw nuts nested on the screw shaft move in opposite directions, ensuring that the displacement distance of the relative movement is absolutely consistent, thereby improving the operation efficiency and accuracy. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. The following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. Obviously, the drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the high-precision jaw mechanism provided by the embodiment of the present invention;

[0026] Figure 2 is Figure 1 an exploded schematic diagram of the high-precision jaw mechanism;

[0027] Figure 3 is Figure 1 a partial schematic diagram of the driving device in ;

[0028] Figure 4 is Figure 1 a schematic diagram of the fixed frame part in ;

[0029] Figure 5 is Figure 1 a schematic diagram of the bolt part in ;

[0030] Figure 6 is Figure 1 a schematic diagram of the jaw assembly in the upper clamping assembly in ;

[0031] Figure 7 is Figure 1 a schematic diagram of the jaw in the lower clamping assembly in.

[0032] Description of the Reference Numerals:

[0033] 1 - Fixed frame; 2 - Servo motor; 3 - Special-shaped ball screw shaft; 4 - Screw nut; 5 - Slide rail; 6 - Connecting piece; 7 - Claw; 8 - Bolt; 9 - Nut; 71 - Clamping foot; 72 - Clamping arm; 73 - Clamping hand. Detailed implementation manner

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0035] It should be understood that the terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" as used herein may also include the plural forms. The terms "include", "comprise", "contain" and "have" are inclusive and thus specify the presence of the stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0036] Although the terms first, second, third, etc. may be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms used in the text do not imply an order or sequence. Thus, the first element, component, region, layer or section discussed below may be referred to as the second element, component, region, layer or section without departing from the teachings of the exemplary embodiments.

[0037] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over" and the like. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation in addition to the orientations depicted in the figure. For example, if the device in the figure is flipped, then an element described as "below" or "beneath" other elements or features will subsequently be oriented as "above" or "over" other elements or features. Thus, the exemplary term "below" can include both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0038] The First Embodiment of the High-Precision Jaw Mechanism

[0039] As Figures 1 - 7 shown, in this embodiment, a high-precision jaw mechanism is provided. The high-precision jaw mechanism includes a fixed frame 1, a driving device, an upper clamping assembly, and a lower clamping assembly. The driving device is installed within the fixed frame;

[0040] The driving device includes a servo motor 2, a special-shaped ball screw shaft 3, and two screw nuts 4. The servo motor 2 drives the special-shaped ball screw shaft 3 to rotate. Two sections of threads with opposite directions and symmetry are provided on the special-shaped ball screw shaft 3. The two screw nuts 4 are respectively screwed onto the two sections of the threads and the two screw nuts 4 are also symmetrically placed with respect to the symmetry point of the two sections of the threads;

[0041] A slide rail 5 is provided on the fixed frame 1. Both of the two screw nuts 4 are slidably connected to the slide rail 5;

[0042] Both the upper clamping assembly and the lower clamping assembly include a strip-shaped connecting member 6 and a plurality of jaw structures. The plurality of jaw structures are uniformly arranged on the connecting member 6 along the length direction of the connecting member 6. The two connecting members 6 are arranged side by side vertically. A protruding upper connecting portion is provided at the upper end of one of the screw nuts 4. The upper connecting portion extends out of the fixed frame 1 and is connected to the inner side surface of the connecting member 6 located in the upper part;

[0043] A protruding lower connecting portion is also provided at the lower end of the other screw nut 4. The lower connecting portion extends out of the fixed frame 1 and is connected to the inner side surface of the connecting member 6 located in the lower part;

[0044] A plurality of the jaw structures of the upper clamping assembly and a plurality of the jaw structures of the lower clamping assembly are respectively arranged adjacent to each other in a one-to-one correspondence, jointly constituting a clamping mechanism that can be used for clamping.

[0045] For the high-precision jaw mechanism provided by the present utility model, the power system is an important point of this design. Compared with the traditional single-arm motion clamping, this design uses a servo motor 2 as the power source, which can simultaneously drive two connecting members 6 to move in the opposite direction accurately and without deviation, so as to ensure that the jaws 7 do not shift during the process from contacting the welding tape to complete clamping.

[0046] The power system consists of a servo motor 2, a special-shaped ball screw shaft 3, a screw nut 4, and a slide rail 5. This mechanism is placed on the equipment frame. The servo motor 2 is connected to the special-shaped ball screw shaft 3 to provide power support and drive the special-shaped ball screw shaft 3 to rotate, thereby driving the screw nut 4 to move horizontally. An assembly hole is reserved on the other side of the screw nut 4 to cooperate with the slide rail 5, improving the stability and accuracy of the movement of the screw nut 4.

[0047] The screw nut 4 is designed as a convex structure. During assembly, the two screw nuts 4 are installed upside down. The protruding part of the lower screw nut 4 is connected to the lower clamping assembly, and the protruding part of the upper screw nut 4 is connected to the upper clamping assembly, preventing friction from being generated when contacting during the reverse movement between different power systems and hindering the operation of the power system.

[0048] The key point of this design is the special-shaped ball screw shaft 3. The threaded groove on the screw shaft is designed as a symmetric reverse structure. When the screw shaft rotates, the two screw nuts 4 nested on the screw shaft move in the opposite direction, ensuring that the displacement distances of the relative movements are absolutely consistent and improving the operation efficiency.

[0049] Embodiment 2

[0050] The high-precision jaw mechanism provided in this embodiment is a further improvement on the high-precision jaw mechanism provided in Embodiment 1. The technical solution described in Embodiment 1 also belongs to this embodiment, and the technical solution already described in Embodiment 1 will not be repeated.

[0051] Specifically, as Figures 1 - 7 shown, in this embodiment, a high-precision jaw mechanism is provided, and the connecting member 6 is detachably connected to a plurality of the jaw structures;

[0052] The connecting member 6 is a frame structure, and the jaw structure includes a screwing member and a jaw 7;

[0053] The screwing member includes a bolt 8 and a nut 9. The bolt 8 passes through the upper and lower two side surfaces of the connecting member 6 and is screwed with the nut 9; a jack is provided on the rod portion of the bolt 8; the jaw 7 includes a jaw foot 71, a jaw arm 72, and a jaw hand 73;

[0054] The clamping foot 71 is inserted into the jack of the bolt 8 through the outer side surface of the connecting member 6;

[0055] The clamping arm 72 is arranged vertically downward, and the upper end of the clamping arm 72 is fixedly connected to the clamping foot 71;

[0056] The clamping hand 73 is located on the side of the clamping arm 72. The length of the clamping jaw 7 of the upper clamping assembly is longer than the length of the clamping jaw 7 of the lower clamping assembly; when the strokes of the two screw nuts 4 are zero, the end faces of two adjacent clamping hands 73 are in contact, and the end face of the clamping hand 73 is inclined at 45 degrees.

[0057] The clamping system is also a key point of this design. Compared with the traditional fixed clamping jaw structure, the clamping jaws 7 of this design can flexibly adjust the quantity and position, and can be freely edited within the framework-type connecting member 6, flexibly matching different numbers of battery grid lines and grid line spacings, improving the product adaptability.

[0058] The clamping system includes two connecting members 6, several clamping jaws 7 and fixing screws.

[0059] The upper, lower and front ends of the connecting member 6 are designed with hollow areas, facilitating the screws to pass through the hollow areas to fasten the clamping jaws 7 arranged according to the actual situation.

[0060] The clamping jaw 7 includes three parts: a clamping foot 71, a clamping arm 72 and a clamping hand 73. The clamping foot 71 is inserted into the connecting member 6. The clamping hand 73 is designed with a 45° surface, facilitating better clamping of the welding tape, different from the conventional horizontal or vertical design, and solving the problem of the welding tape falling off under the conventional design.

[0061] The fixing screw is designed with a hollow in the middle, facilitating the clamping foot 71 of the clamping jaw 7 to penetrate into it, and cooperating with the connecting member 6 to achieve the purpose of fixing the clamping jaw 7.

[0062] In summary, the high-precision clamping jaw mechanism provided by this application solves the problems of product scrapping and downgrading and increased repair costs caused by inaccurate clamping of the welding tape by the clamping jaws of the photovoltaic welding machine.

[0063] It solves the problem of poor compatibility of the fixed clamping jaws of the photovoltaic welding machine, and the need to increase equipment costs because it cannot adapt to all types of battery wafers.

[0064] It solves the problem of the welding tape falling off caused by weak clamping force under the horizontal or vertical clamping jaw design of the photovoltaic welding machine.

[0065] Finally, it should be noted that: for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present application, the present application can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0066] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard 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 high-precision jaw mechanism, characterized in that, It includes a driving device, an upper clamping assembly and a lower clamping assembly; The driving device includes a special-shaped ball screw shaft and two screw nuts; two sections of threads with opposite directions and symmetry are arranged on the special-shaped ball screw shaft, and the two screw nuts are respectively screwed with the two sections of threads; Both the upper clamping assembly and the lower clamping assembly include strip-shaped connecting members and a plurality of jaw structures, and the plurality of jaw structures are uniformly arranged on the connecting members along the length direction of the connecting members; the two connecting members are arranged side by side up and down; the plurality of jaw structures of the upper clamping assembly and the plurality of jaw structures of the lower clamping assembly are respectively arranged adjacent to each other in one-to-one correspondence to jointly form a clamping mechanism that can be used for clamping.

2. The high-precision jaw mechanism according to claim 1, wherein It further includes a fixed frame, and the driving device is installed in the fixed frame; An upper connecting portion protruding upward is arranged at the upper end of one of the screw nuts, and the upper connecting portion extends out of the fixed frame and is connected to the inner side surface of the connecting member located in the upper part; A lower connecting portion protruding downward is also arranged at the lower end of the other screw nut, and the lower connecting portion extends out of the fixed frame and is connected to the inner side surface of the connecting member located in the lower part.

3. The high-precision jaw mechanism according to claim 2, characterized in that, Sliding rails are arranged on the fixed frame, and both of the two screw nuts are slidably connected to the sliding rails.

4. The high-precision jaw mechanism according to claim 1, characterized in that, The connecting member is detachably connected to the plurality of jaw structures.

5. The high-precision jaw mechanism according to claim 2, characterized in that The connecting member is of a frame structure, and the jaw structure includes a screwing member and a jaw; The screwing member includes a bolt and a nut, the bolt passes through the upper and lower side surfaces of the connecting member and is screwed with the nut; a jack is arranged on the rod portion of the bolt.

6. The high-precision jaw mechanism according to claim 5, characterized in that, The jaw includes a jaw foot, a jaw arm and a jaw hand; The jaw foot passes through the outer side surface of the connecting member and is inserted into the jack of the bolt; The jaw arm is arranged vertically downward, and the upper end of the jaw arm is fixedly connected to the jaw foot; The jaw hand is located on the side surface of the jaw arm, and the length of the jaw of the upper clamping assembly is longer than the length of the jaw of the lower clamping assembly; when the stroke of the two screw nuts is zero, the end faces of two adjacent jaw hands are in contact.

7. The high-precision jaw mechanism according to claim 6, characterized in that, The end face of the jaw hand is inclined at 45 degrees.

8. The high-precision jaw mechanism according to claim 1, characterized in that The driving device further includes a servo motor; the servo motor drives the special-shaped ball screw shaft to rotate.

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