A universal fixture

Abstract

The utility model discloses a general formula clamp, include: base, a pair of first clamping component, movably set up on the base to be configured as can along the synchronous mutual direction or reverse movement of first direction, a pair of second clamping component, movably set up on the base to be configured as can along the synchronous mutual direction or reverse movement of second direction, wherein, a pair of first clamping component and a pair of second clamping component jointly form adjustable first clamping space. Solved the problem of traditional fixture change type difficult and positioning inaccuracy.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a universal clamp. Background Technology

[0002] In existing technologies, mechanical clamps are often used to fix products (such as power banks and cards) when performing surface printing or spraying. Traditional mechanical clamps can usually only be adapted to a specific model and size of product. When the product model changes, the clamps need to be replaced or significantly adjusted, which is costly and time-consuming. Moreover, existing clamps are difficult to position accurately and hold stably, and are prone to slight displacement, resulting in deviations in the position of the printed pattern. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a universal fixture to solve the problems of difficult changeover and inaccurate positioning of traditional fixtures.

[0004] This utility model is achieved using the following technical solution:

[0005] A general-purpose clamp, comprising:

[0006] Base;

[0007] A pair of first clamping members are movably disposed on the base and configured to move synchronously toward or in opposite directions along a first direction;

[0008] A pair of second clamping members are movably disposed on the base and configured to move synchronously toward or in opposite directions along a second direction;

[0009] Among them, a pair of first clamping members and a pair of second clamping members together form an adjustable first clamping space.

[0010] Furthermore, it also includes:

[0011] A pair of first extension members are detachably mounted on a pair of first clamping members;

[0012] When a pair of extension members are installed on a pair of first clamping members, the pair of extension members cooperate with a pair of second clamping members to adjust the first clamping space.

[0013] Furthermore, the first extension member includes a body and an L-shaped extension step formed on the body. The L-shaped extension step includes an extension plane perpendicular to the second direction and an extension clamping surface perpendicular to the first direction. When the first extension member is installed on the first clamping member, a pair of extension clamping surfaces and a pair of second clamping surfaces of the second clamping members together form an adjustable second clamping space.

[0014] Furthermore, the first extension member is provided with an extension opening for detachable installation with the first clamping member, and the bottom of the first extension member is provided with a rolling element for contacting the surface of the base.

[0015] Furthermore, it also includes:

[0016] A second extension is detachably mounted in the central region of the first clamping space;

[0017] The inner sides of the first clamping member and the second clamping member are respectively provided with a first L-shaped step and a second L-shaped step for supporting and limiting the edge of the clamped member, and the second extension member has a support platform that is flush with the horizontal plane of the second L-shaped step.

[0018] Furthermore, the bottom of the second extension member is provided with a magnetic component and a positioning pin, and the base is provided with a fixing component that attracts and fixes the magnetic component to itself and a positioning hole that cooperates with the positioning pin.

[0019] Furthermore, it also includes a measuring cover, the size of which is adapted to the size of the base, the measuring cover having a visual measuring window, and the surface of the visual measuring window having cross-shaped scale lines.

[0020] Furthermore, a pair of first clamping members move synchronously through a first gear and rack mechanism, and a pair of second clamping members move synchronously through a second gear and rack mechanism. The base is also provided with an isolation plate, which is disposed between the first gear and rack mechanism and the second gear and rack mechanism to isolate the movement space of the two. The upper surface of the base is provided with a first guide groove to guide the pair of first clamping members to move synchronously towards or in opposite directions; the upper surface of the base is provided with a second guide groove to guide the pair of second clamping members to move synchronously towards or in opposite directions.

[0021] Furthermore, the first gear and rack mechanism includes a first directional gear and two first directional racks. The two first directional racks are respectively connected to a pair of first clamping members and mesh with the first directional gear. The second gear and rack mechanism includes a track seat, a second directional gear disposed in the track seat, and two second directional racks. The two second directional racks are respectively connected to a pair of second clamping members and mesh with the second directional gear. A gear shaft is provided on the base. The gear shaft passes through the isolation plate and is connected to the track seat. The first directional gear and the second directional gear are both sleeved on the gear shaft and separated by the isolation plate. The ends of the two second directional racks extending out of the base are each provided with a pressing part.

[0022] Furthermore, each of the first directional racks is provided with a first accommodating space, and a first directional elastic preload is disposed within the first accommodating space; the base is provided with a first placement groove communicating with the first accommodating space; the two ends of the first directional elastic preload act on the end of the first accommodating space and the end of the first placement groove, respectively, so that the first directional rack and the first clamping member connected thereto are always subjected to a preload force pointing towards the clamping center; each of the second directional racks is provided with a second accommodating space inside, and a second directional elastic preload is disposed therein; the base is provided with a limiting protrusion extending to the second accommodating space; the two ends of the second directional elastic preload act on the end of the second accommodating space and the limiting protrusion, respectively, so that the second directional rack and the second clamping member connected thereto are always subjected to a preload force pointing towards the clamping center.

[0023] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0024] This invention enables the first clamping space to be adjusted independently and synchronously in two directions, allowing it to adapt to products of different sizes and shapes. This achieves universal compatibility with a variety of products, enabling rapid changeover without changing the fixture. This reduces changeover costs and time, improves clamping accuracy and stability, and prevents product displacement during processing. It effectively solves the problems of difficult changeover and inaccurate positioning associated with traditional fixtures. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a general-purpose clamp according to an embodiment of the present utility model;

[0026] Figure 2 This is a front view of the general-purpose clamp according to an embodiment of the present utility model;

[0027] Figure 3 This is a top view of the general-purpose clamp according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the first extension component of this utility model installed on the base;

[0029] Figure 5 yes Figure 4 Top view of the structure;

[0030] Figure 6 This is one of the structural schematic diagrams of the first extension component in an embodiment of this utility model;

[0031] Figure 7 This is the second structural schematic diagram of the first extension component in this embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the measuring cover according to an embodiment of the present utility model;

[0033] Figure 9 This is a schematic diagram of the second extension component of this utility model installed on the base;

[0034] Figure 10 This is a schematic diagram of the structure of the second extension component according to an embodiment of the present utility model;

[0035] Figure 11 This is a schematic diagram of the internal structure of the base according to an embodiment of the present utility model;

[0036] Figure 12 This is a schematic diagram of the isolation sheet according to an embodiment of the present utility model;

[0037] Figure 13 This is a schematic diagram of the first gear and rack mechanism according to an embodiment of the present utility model;

[0038] Figure 14 This is a schematic diagram of the first direction rack of this utility model embodiment;

[0039] Figure 15 This is an assembly diagram of the track seat and the base according to an embodiment of the present utility model;

[0040] Figure 16 This is a schematic diagram of the second gear and rack mechanism according to an embodiment of the present utility model;

[0041] Figure 17 This is a schematic diagram of the second-direction rack according to an embodiment of the present invention;

[0042] Figure 18 This is a top view of the base according to an embodiment of the present utility model;

[0043] Figure 19 This is a schematic diagram of the bottom of the base according to an embodiment of the present invention;

[0044] Figure 20 This is a schematic diagram of the fixed platform according to an embodiment of the present utility model;

[0045] In the diagram: 1. Base; 11. Positioning structure; 12. Isolation plate; 13. First guide groove; 14. Second guide groove; 15. Limiting protrusion; 16. Gear shaft; 17. First placement groove; 18. Fixing member; 19. Positioning hole; 2. First clamping member; 21. First L-shaped step; 3. Second clamping member; 31. Second L-shaped step; 4. First extension member; 41. Extension plane; 42. Extension clamping surface; 43. Extension opening; 44. Rolling element; 5. Measuring cover; 1. Visual measurement window; 52. Scale line; 61. First direction gear; 62. First direction rack; 621. First accommodating space; 63. First direction elastic preload; 70. Track seat; 71. Second direction gear; 72. Second direction rack; 721. Second accommodating space; 73. Second direction elastic preload; 74. Pressing part; 8. Fixed platform; 81. Positioning groove; 9. Second extension part; 91. Support platform; 92. Magnetic part; 93. Positioning pin. Detailed Implementation

[0046] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0047] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0048] like Figures 1 to 20 As shown, the present invention provides a universal clamp, comprising:

[0049] Base 1;

[0050] A pair of first clamping members 2 are movably disposed on the base 1 and configured to move synchronously toward or in opposite directions along a first direction;

[0051] A pair of second clamping members 3 are movably disposed on the base 1 and configured to move synchronously toward or in opposite directions along a second direction;

[0052] Among them, a pair of first clamping members 2 and a pair of second clamping members 3 together form an adjustable first clamping space.

[0053] In this embodiment, the base 1 serves as a basic support structure, providing a stable platform to ensure the stability of the entire clamp during operation and providing a reference for the movement of the clamping components. Specifically, the base 1 has a positioning structure 11 at its bottom, which cooperates with the positioning groove 81 of the fixed platform 8 to fix the base 1. The positioning structure 11 can be a positioning post or a positioning shaft. A pair of first clamping components 2 are movably disposed on the base 1 and move synchronously towards or in opposite directions along a first direction, allowing adjustment of the clamping space in the first direction to accommodate products of different widths and achieve precise clamping in the width direction. A pair of second clamping components 3 are movably disposed on the base 1 and move synchronously towards or in opposite directions along a second direction, allowing adjustment of the clamping space in the second direction to accommodate products of different lengths and achieve precise clamping in the length direction. A pair of first clamping components 2 and a pair of second clamping components 3 together form an adjustable first clamping space. Through coordinated movement, they form a two-dimensional adjustable area, precisely matching the product size and ensuring that the product is clamped evenly and stably. The synchronous movement mechanism ensures uniform distribution of clamping force, preventing product tilting or sliding, thereby reducing minute displacements and improving positioning accuracy. By enabling the first clamping space to be adjusted independently and synchronously in two directions, it can adapt to products of different sizes and shapes, achieving universal adaptability to multiple products. This allows for rapid changeover without changing the fixture, reducing changeover costs and time, improving clamping accuracy and stability, and preventing product displacement during processing. This effectively solves the problems of difficult changeover and inaccurate positioning associated with traditional fixtures.

[0054] As a preferred embodiment, it also includes:

[0055] A pair of first extension members 4 are configured to be selectively mounted on a pair of first clamping members 2;

[0056] When a pair of extension members are installed on a pair of first clamping members 2, the pair of extension members cooperate with a pair of second clamping members 3 to adjust the first clamping space.

[0057] In this embodiment, when printing smaller products (with smaller product widths), a pair of first extension members 4 are mounted on a pair of first clamping members 2. This reduces the boundary size of the first clamping space to accommodate smaller products (such as Bluetooth headset shells). This avoids the cumbersome process of disassembling or recalibrating the entire fixture when changing models, significantly simplifying the operation. Through the synergistic effect of the first extension members 4 and the second clamping members 3, not only is the clamping range expanded to accommodate smaller products, but the uniform distribution of clamping force and positional stability are also ensured, while maintaining the core adjustment function of the fixture without interference. The first extension members 4 are detachably mounted on the base 1, allowing users to quickly add or remove them without changing the main body of the fixture, thus achieving universal adaptation to the clamping needs of smaller products.

[0058] In a preferred embodiment, the first extension member 4 includes a body and an L-shaped extension step formed on the body. The L-shaped extension step includes an extension plane 41 perpendicular to the second direction and an extension clamping surface 42 perpendicular to the first direction. When the first extension member 4 is installed on the first clamping member 2, a pair of extension clamping surfaces 42 and a pair of second clamping surfaces of the second clamping member 3 together form an adjustable second clamping space.

[0059] In this embodiment, the body of the first extension member 4 serves as the basic carrier, and the L-shaped extension step formed on it is the core innovation. This L-shaped extension step includes two mutually perpendicular feature surfaces: an extension plane 41 perpendicular to the second direction and an extension clamping surface 42 perpendicular to the first direction. The design of the extension plane 41 being perpendicular to the second direction allows it to provide a horizontal support reference, preventing the product from sliding or tilting in the second direction. The design of the extension clamping surface 42 being perpendicular to the first direction forms an orthogonal constraint with the movement direction of the first clamping member 2, used to clamp the side of the product and limit the product's displacement in the first direction. When the first extension member 4 is installed on the first clamping member 2, the pair of extension clamping surfaces 42 cooperate with the second clamping surfaces of the pair of second clamping members 3 to form an adjustable second clamping space. The key to this L-shaped step structural design is that, based on the geometric relationship between the two perpendicular directions, it simultaneously achieves the dual functions of bottom support and side clamping of the product, avoiding the shortcomings of a single-plane design that cannot accommodate multi-dimensional constraints. This design provides precise positioning points in both the X and Y planes for the second clamping space, significantly reducing the risk of minor rotation or slippage of the product during clamping, thus ensuring the accuracy of pattern positioning during printing or spraying operations. Based on the specific angle and direction configuration of the L-shaped steps, it can naturally adapt to the edge shapes of different products, achieving stable clamping without additional adjustments—a technological advantage not found in traditional simple expansion structures. For example, when printing cards, the card is placed on the expansion plane 41, and the second clamping surface of the second clamping member 3 and the expansion clamping surface 42 limit the edge of the card, achieving card clamping and fixation. The expansion plane 41 further adapts to products of different sizes (especially those with smaller thicknesses).

[0060] In a preferred embodiment, the first extension member 4 is provided with an extension opening 43 for detachable installation with the first clamping member 2, and the bottom of the first extension member 4 is provided with a rolling element 44 for contacting the surface of the base 1.

[0061] In this embodiment, the expansion port 43 enables convenient installation and removal of the first expansion member 4. This detachable mechanism not only simplifies the operation process but also allows for flexible replacement according to different product sizes, avoiding the risk of loosening that may occur with traditional fixing methods, thus ensuring the reliability and adaptability of the installation process. Crucially, based on the structural characteristics of the first clamping member 2, the expansion port 43 provides a precise positioning interface, effectively preventing initial displacement due to insecure installation when adjusting the clamping space. The rolling element 44 is designed based on the physical characteristics of the surface contact of the base 1, introducing rolling friction between the bottom of the first expansion member 4 and the base 1 to replace sliding friction, significantly reducing movement resistance. According to the flatness requirements of the base 1 plane, the rolling element 44 allows the first expansion member 4 to move smoothly and continuously during adjustment, avoiding minor jumps or offsets caused by friction jamming, thus ensuring the dynamic stability of the clamping position and providing a high-precision positioning basis for printing or spraying operations.

[0062] As a preferred embodiment, it also includes:

[0063] A second extension 9 is detachably mounted in the central region of the first clamping space;

[0064] The inner sides of the first clamping member 2 and the second clamping member 3 are respectively provided with a first L-shaped step 21 and a second L-shaped step 31 for supporting and limiting the edge of the clamping member. The second extension member 9 has a support platform 91 that is flush with the horizontal plane of the first L-shaped step 21 and the second L-shaped step 31.

[0065] In this embodiment, by installing the second extension 9 in the central area of ​​the first clamping space, the central support point can be flexibly supplemented according to different product needs. For example, when printing plastic cards, the support platform 91 of the second extension 9 can support the central area of ​​the plastic card, avoiding the risk of the central area of ​​the plastic card being suspended. In this way, the plastic card is not easy to collapse during printing. The first L-shaped step 21 and the second L-shaped step 31 on the inner side of the first clamping member 2 and the second clamping member 3 are used to support and limit the edge of the clamped part. This step structure, through the combination of vertical and horizontal planes, ensures that the edge of the product is firmly constrained in the horizontal and vertical directions, preventing lateral sliding or lifting. The support platform 91 of the second extension 9 is flush with the horizontal plane of the first L-shaped step 21 and the second L-shaped step 31. This height consistency design makes the support surface seamlessly connected when the product is placed, avoiding tilting or local suspension caused by height difference, thereby ensuring that the product is evenly stressed in the entire clamping area, enhancing the positioning accuracy. It is especially suitable for surface processing scenarios of thin products such as power banks and cards, ensuring accurate alignment of printed or sprayed patterns. In a preferred embodiment, the bottom of the second extension member 9 is provided with a magnetic element 92 and a positioning pin 93, and the base 1 is provided with a fixing element 18 that is attracted and fixed to the magnetic element 92 and a positioning hole 19 that cooperates with the positioning pin 93.

[0066] In this embodiment, the magnetic component 92 at the bottom of the second extension 9 attracts the fixing component 18 of the base 1, providing an immediate and stable vertical fixing force. This prevents the second extension 9 from easily detaching from the base 1 due to vibration or external force during clamping operations, avoiding the risk of falling due to lack of restraint in traditional installation methods. Simultaneously, the precise engagement mechanism between the positioning pin 93 and the positioning hole 19 ensures accurate horizontal positioning of the second extension 9, limiting deviations during installation and ensuring strict flush alignment between the support platform 91 and the horizontal surfaces of the first L-shaped step 21 and the second L-shaped step 31. This design not only simplifies the installation process, enabling rapid fixing without additional tools, but also enhances the overall consistency of the clamping space, providing a reliable positioning foundation for high-precision printing or spraying.

[0067] In a preferred embodiment, a measuring cover 5 is also included, the size of which is adapted to the size of the base 1. The measuring cover 5 is provided with a visual measuring window 51, and the surface of the visual measuring window 51 is provided with cross-shaped scale lines 52.

[0068] In this embodiment, the size of the measuring cover 5 is adapted to the size of the base 1, ensuring that the measuring cover 5 can tightly cover the entire working area of ​​the base 1, forming a unified measuring environment, thereby providing the operator with a reliable reference frame. The measuring cover 5 is provided with a visual measuring window 51, with a transparent observation area designed based on the size of the base 1, allowing the operator to directly see the product status inside the clamping space, monitor minute changes during the clamping process in real time, and reduce adjustment errors caused by obstructed vision or repeated disassembly. The surface of the visual measuring window 51 is provided with cross-shaped scale lines 52, and cross reference lines are set according to the transparency of the window, providing an intuitive alignment basis for the product center or edge. The operator can accurately match the product feature points according to the scale lines 52, avoiding displacement caused by visual deviation, ensuring that the printed pattern is always in the predetermined position, and improving the positioning efficiency and accuracy of the fixture during the changeover process.

[0069] In a preferred embodiment, a pair of first clamping members 2 move synchronously through a first gear and rack mechanism, and a pair of second clamping members 3 move synchronously through a second gear and rack mechanism. The base 1 is also provided with an isolation plate 12, which is disposed between the first gear and rack mechanism and the second gear and rack mechanism to isolate the movement space of the two. The upper surface of the base 1 is provided with a first guide groove 13 to guide the pair of first clamping members 2 to move synchronously towards or in opposite directions; the upper surface of the base 1 is provided with a second guide groove 14 to guide the pair of second clamping members 3 to move synchronously towards or in opposite directions.

[0070] In this embodiment, the synchronous movement of a pair of first clamping members 2 is achieved based on the meshing principle of the first gear and rack mechanism. The rigid meshing of the gear and rack forces the two first clamping members 2 to move towards or away from each other in the first direction at the same speed, avoiding the asynchronous movement caused by manual adjustment or simple slide rails, thereby accurately controlling the size of the clamping space and preventing product displacement. Similarly, the synchronous movement of a pair of second clamping members 3 is achieved based on the meshing characteristics of the second gear and rack mechanism, providing symmetrical synchronization guarantee for the second direction and ensuring the coordination of bidirectional clamping. An isolating plate 12, located between two gear and rack mechanisms on the base 1, effectively blocks cross-interference between the first and second direction motion spaces, preventing collisions or jamming during operation and ensuring independent and stable operation of the two motion systems. The first guide groove 13 on the upper surface of the base 1 guides the movement path of a pair of first clamping members 2 based on its linear constraint characteristics, forcing the first clamping members 2 to move strictly in a straight line along the first direction, reducing lateral swaying and frictional deviation, and improving the smoothness of synchronous movement. Similarly, the second guide groove 14 constrains the movement of a pair of second clamping members 3 based on its guiding mechanism, ensuring the linear accuracy of movement in the second direction and further enhancing clamping stability. Overall, these features work synergistically to ensure that the clamping members maintain precise synchronization during adjustment, effectively suppressing product displacement risks and meeting the requirements of high-precision surface treatment.

[0071] In a preferred embodiment, the first gear and rack mechanism includes a first directional gear 61 and two first directional racks 62. The two first directional racks 62 are respectively connected to a pair of first clamping members 2 and mesh with the first directional gear 61. The second gear and rack mechanism includes a track seat 70, a second directional gear 71 disposed in the track seat 70, and two second directional racks 72. The two second directional racks 72 are respectively connected to a pair of second clamping members 3 and mesh with the second directional gear 71. A gear shaft 16 is provided on the base 1. The gear shaft 16 passes through the isolation plate 12 and is connected to the track seat 70. The first directional gear 61 and the second directional gear 71 are both sleeved on the gear shaft 16 and separated by the isolation plate 12. The ends of the two second directional racks 72 extending out of the base 1 are each provided with a pressing part 74.

[0072] In this embodiment, the synchronous opposite or reverse movement of the first clamping member 2 is achieved through the meshing mechanism of the first directional gear 61 and the two first directional racks 62. This single-gear-driven double-rack layout ensures the rigidity of motion transmission and eliminates the backlash error that may occur with independent drive, thereby avoiding positioning deviations caused by small displacements. Based on the constraint design of the track seat 70 on the second directional gear 71, the second gear rack mechanism operates inside the track seat 70, providing a stable guiding environment, reducing rack wobbling during movement, and enhancing the accuracy of second-direction clamping. According to the shared shaft structure of the gear shaft 16 connecting to the track seat 70 after passing through the isolation plate 12, the first directional gear 61 and the second directional gear 71 share the same rotation axis, simplifying the overall mechanical layout. At the same time, the physical separation of the isolation plate 12 prevents mutual interference between the two directional movements, ensuring the independence and reliability of their respective movements. The arrangement of the first directional gear 61 and the second directional gear 71 separated by the isolation plate 12 effectively isolates the two gears axially, avoiding cross-influence caused by vibration or load changes and further improving the stability of the system. The pressing part 74 at the end of the second directional rack 72 allows the user to directly apply external force for quick adjustment. This design simplifies the operation process, improves the response speed and practicality of the fixture, and makes the adjustment of the clamping space more convenient and efficient. These structures collectively ensure high-precision positioning and stable clamping of the fixture during printing or spraying, fundamentally solving the product displacement problem caused by inaccurate movement in existing technologies.

[0073] In a preferred embodiment, each first directional rack 62 is provided with a first accommodating space 621, and a first directional elastic preload member 63 is disposed within the first accommodating space 621; the base 1 is provided with a first placement groove 17 communicating with the first accommodating space 621; the two ends of the first directional elastic preload member 63 act on the ends of the first accommodating space 621 and the ends of the first placement groove 17 respectively, so that the first directional rack 62 and the first clamping member 2 connected thereto are always subjected to a preload force pointing towards the clamping center; each second directional rack 72 is provided with a second accommodating space 721 inside, and a second directional elastic preload member 73 is disposed therein; the base 1 is provided with a limiting protrusion 15 extending to the second accommodating space 721; the two ends of the second directional elastic preload member 73 act on the ends of the second accommodating space 721 and the limiting protrusion respectively, so that the second directional rack 72 and the second clamping member 3 connected thereto are always subjected to a preload force pointing towards the clamping center.

[0074] In this embodiment, a first accommodating space 621 is provided inside the first directional rack 62, allowing the first directional elastic preload member 63 to be directly embedded into the moving component body, avoiding the complexity of external additional structures. Simultaneously, it ensures that the preload force is synchronized with the rack movement in real time, preventing force transmission lag due to component separation. The base 1 is provided with a first placement groove 17 communicating with the first accommodating space 621, providing a rigid support point for the first directional elastic preload member 63. The fixed characteristics of the base 1 ensure stable output of the preload force, preventing deformation of the base 1 from affecting clamping accuracy. The two ends of the first directional elastic preload member 63 act on the ends of the first accommodating space 621 and the first placement groove 17, forming a continuous preload force pointing towards the clamping center (e.g., ...). Figure 13 (As indicated by the arrow), this design allows the first clamping member 2 to automatically move towards the center during clamping, eliminating movement gaps and preventing loosening or displacement caused by vibration. Similarly, the second accommodating space 721 inside the second direction rack 72 allows the second direction elastic pre-tightening member 73 to be tightly integrated inside the second direction rack 72, reducing the impact of external interference on the pre-tightening effect. The limiting protrusion 15 constrains the installation position of the second direction elastic pre-tightening member 73, ensuring that the pre-tightening force is accurately applied to the movement direction of the second direction rack 72, avoiding uneven force distribution caused by installation deviation. The two ends of the second direction elastic pre-tightening member 73 act on the ends of the second accommodating space 721 and the limiting protrusion, maintaining the second clamping member 3 under constant central pre-tightening force, achieving dynamic compensation of clamping force, and preventing positional displacement caused by external impact. Overall, this built-in pre-tightening design, without adding extra operating steps, achieves a fundamental improvement in clamping stability through structural optimization of the components themselves, ensuring precise fixation of the product position during printing or spraying.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A universal clamp, characterized in that, include: Base (1); A pair of first clamping members (2) are movably disposed on the base (1) and configured to move synchronously toward or in opposite directions along a first direction; A pair of second clamping members (3) are movably disposed on the base (1) and configured to move synchronously toward or in opposite directions along a second direction; Among them, a pair of first clamping members (2) and a pair of second clamping members (3) together form an adjustable first clamping space.

2. The universal clamp according to claim 1, characterized in that, Also includes: A pair of first extension members (4) are detachably mounted on a pair of first clamping members (2); When a pair of extension members are installed on a pair of first clamping members (2), the pair of extension members cooperate with a pair of second clamping members (3) to adjust the first clamping space.

3. The universal clamp according to claim 2, characterized in that, The first extension member (4) includes a body and an L-shaped extension step formed on the body. The L-shaped extension step includes an extension plane (41) perpendicular to the second direction and an extension clamping surface (42) perpendicular to the first direction. When the first extension member (4) is installed on the first clamping member (2), a pair of extension clamping surfaces (42) and a pair of second clamping surfaces of the second clamping members (3) together form an adjustable second clamping space.

4. The universal clamp according to claim 2, characterized in that, The first extension member (4) is provided with an extension opening (43) for detachable installation with the first clamping member (2), and the bottom of the first extension member (4) is provided with a rolling element (44) for contacting the surface of the base (1).

5. The universal clamp according to claim 1, characterized in that, Also includes: A second extension (9) is detachably mounted in the central region of the first clamping space; The inner sides of the first clamping member (2) and the second clamping member (3) are respectively provided with a first L-shaped step (21) and a second L-shaped step (31) for supporting and limiting the edge of the clamping member. The second extension member (9) has a support platform (91) that is flush with the horizontal plane of the second L-shaped step (31).

6. The universal clamp according to claim 5, characterized in that, The bottom of the second extension (9) is provided with a magnetic element (92) and a positioning pin (93). The base (1) is provided with a fixing element (18) that is attracted and fixed to the magnetic element (92) and a positioning hole (19) that cooperates with the positioning pin (93).

7. The universal clamp according to claim 1, characterized in that, It also includes a measuring cover (5), the size of which is adapted to the size of the base (1), the measuring cover (5) is provided with a visual measuring window (51), and the surface of the visual measuring window (51) is provided with cross-shaped scale lines (52).

8. The universal clamp according to any one of claims 1-7, characterized in that, A pair of first clamping members (2) move synchronously through a first gear and rack mechanism, and a pair of second clamping members (3) move synchronously through a second gear and rack mechanism. The base (1) is also provided with an isolation plate (12), which is disposed between the first gear and rack mechanism and the second gear and rack mechanism to isolate the movement space of the two. The upper surface of the base (1) is provided with a first guide groove (13) to guide the pair of first clamping members (2) to move synchronously towards or in opposite directions; the upper surface of the base (1) is provided with a second guide groove (14) to guide the pair of second clamping members (3) to move synchronously towards or in opposite directions.

9. The universal clamp according to claim 8, characterized in that, The first gear and rack mechanism includes a first directional gear (61) and two first directional racks (62). The two first directional racks (62) are respectively connected to a pair of first clamping members (2) and mesh with the first directional gear (61). The second gear and rack mechanism includes a track seat (70), a second directional gear (71) disposed in the track seat (70), and two second directional racks (72). The two second directional racks (72) are respectively connected to a pair of second clamping members (3) and mesh with the second directional gear (71). A gear shaft (16) is provided on the base (1). The gear shaft (16) passes through the isolation plate (12) and is connected to the track seat (70). The first directional gear (61) and the second directional gear (71) are both sleeved on the gear shaft (16) and separated by the isolation plate (12). The ends of the two second directional racks (72) extending out of the base (1) are each provided with a pressing part (74).

10. The universal clamp according to claim 9, characterized in that, Each of the first directional racks (62) is provided with a first accommodating space (621), and a first directional elastic preload member (63) is provided in the first accommodating space (621); the base (1) is provided with a first placement groove (17) communicating with the first accommodating space (621); the two ends of the first directional elastic preload member (63) act on the end of the first accommodating space (621) and the end of the first placement groove (17) respectively, so that the first directional rack (62) and the first clamping member (2) connected thereto are always subjected to a preload force pointing towards the clamping center; Each second direction rack (72) has a second accommodating space (721) inside, and a second direction elastic preload member (73) is provided therein. The base (1) has a limiting protrusion (15) extending to the second accommodating space (721). The two ends of the second direction elastic preload member (73) act on the end of the second accommodating space (721) and the limiting protrusion respectively, so that the second direction rack (72) and the second clamping member (3) connected thereto are always subjected to a preload force pointing towards the clamping center.

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