Clamping tool for surface mounting

Abstract

The utility model relates to a clamping tool, in particular to a clamping tool for surface mounting. The clamping tool comprises a workbench, supporting legs, a motor, a bidirectional lead screw and a belt pulley assembly, the supporting legs are fixedly connected to the left side and the right side of the bottom of the workbench, sliding grooves distributed in the left-right direction are formed in the top of the workbench, the motor is installed on the right front side of the workbench, and the bidirectional lead screw is installed on the motor. Two-way lead screws distributed front and back are rotationally connected into the workbench, and a belt pulley assembly is arranged between the left ends of the two two-way lead screws. By arranging a mounting shell, an air cylinder, clamping plates II, a rack I, a rack II and a gear, the air cylinder is started, a telescopic rod of the air cylinder is controlled to stretch out to enable the upper side to move inwards, the rack I, the gear and the rack II are matched, then the clamping plates II on the lower side synchronously move inwards, and the two clamping plates II are matched to make contact with the edges of the upper side and the lower side of the printed circuit board correspondingly. And therefore, the problem of poor clamping effect in the prior art is effectively solved.

Description

Technical Field

[0001] The utility model relates to a clamping tool, in particular to a clamping tool for patches. Background Art

[0002] SMD is a surface assembly technology, which is the most popular technology and process in the current electronic assembly industry. The surface assembly technology of electronic circuits, called surface mounting or surface mounting technology, is a circuit assembly technology that mounts pinless or short-lead surface assembly components on the surface of a printed circuit board or other substrate, and assembles them by soldering through methods such as reflow soldering or dip soldering. When performing SMD, it is necessary to use a clamping tool to pre-fix the printed circuit board.

[0003] The patent with the patent authorization announcement number CN217904763U discloses a flexible circuit board SMT magnetic patch fixture, including a patch body and a stretching plate, the top of the patch body is electrically connected to a conveying device, the inside of the conveying device is electrically connected to a conveyor, a circuit board is placed on the top of the conveyor, and a stretching fork arm is screwed to one side of the stretching plate. Although the above patent can adjust the clamping position to achieve the clamping of circuit boards of various sizes, there are still some shortcomings in actual use. For example, when clamping the circuit board, the two stretching plates can only clamp the edges of the left and right sides of the circuit board respectively, and the clamping effect is not good, and the stability of the circuit board during the patch process cannot be guaranteed.

[0004] Therefore, a patch clamping tool is particularly needed to solve the problems existing in the prior art. Utility Model Content

[0005] In order to overcome the shortcomings of the existing patent that the two stretching plates can only clamp the edges of the left and right sides of the circuit board respectively, the clamping effect is poor, and the stability of the circuit board cannot be guaranteed during the patch process, the utility model provides a patch clamping tool.

[0006] The utility model is realized through the following technical means: a clamping tool for patch, including a workbench, supporting feet, a motor, a bidirectional screw, a pulley assembly and a clamping plate I, the left and right sides of the bottom of the workbench are fixedly connected with supporting feet, the top of the workbench is provided with sliding grooves distributed on the left and right sides, a motor is installed on the right front side of the workbench, the inside of the workbench is rotatably connected with a bidirectional screw distributed front and back, a pulley assembly is arranged between the left ends of the two bidirectional screws, the output shaft of the motor penetrates into the inside of the workbench, and is connected to the bidirectional screw on the front side through a coupling, a symmetrically distributed clamping plate I is threadedly connected between the outsides of the two bidirectional screws, the clamping plate I slides between two longitudinally aligned sliding grooves, the motor runs, the bidirectional screw on the front side drives the pulley assembly to rotate, the pulley assembly drives the bidirectional screw on the rear side to rotate synchronously to adjust the clamping distance of the two clamping plates I, and also includes a clamping mechanism, and the clamping plate I is provided with a clamping mechanism for secondary clamping of a printed circuit board.

[0007] More preferably, the clamping mechanism includes a mounting shell, a cylinder, a splint II, a rack I, a rack II and a gear, a mounting shell is mounted on the upper part of the splint I, a cylinder distributed front and back is mounted inside the mounting shell, a splint II is fixedly connected between the telescopic rods of the two longitudinally aligned cylinders, another splint II is slidably connected to the lower part of the splint I, the rack I distributed front and back is fixedly connected to the upper splint II, the rack II distributed front and back is fixedly connected to the lower splint II, the rack I and the rack II are respectively located on both sides of the gear and meshed with each other, by controlling the telescopic rod of the cylinder to extend, the upper splint II drives the rack I to move inward, the rack I meshes with the gear, the gear rotates to mesh with the rack II, and the rack II drives the lower splint II to move inward synchronously.

[0008] More preferably, a rubber pad for anti-slip is provided at the bottom end of the supporting foot.

[0009] More preferably, the mounting shell is provided with a plurality of ventilation holes for heat dissipation.

[0010] More preferably, it also includes a guide rod II, a buffer plate and a spring. A plurality of guide rods II distributed in a straight line are slidably connected to the splint II. A buffer plate is fixedly connected between the horizontally aligned guide rods II. A spring for applying pressure is sleeved on the outside of the guide rod II, and both ends of the spring are respectively connected to the splint I and the splint II.

[0011] More preferably, it further includes a guide rod I, and the guide rod I is fixedly connected to the front and rear sides of the clamping plate I and the movable plate II, and the clamping plate II slides between the outsides of the two guide rods I.

[0012] More preferably, a rubber block is further included, and the clamping surface of the buffer plate is connected to the rubber block for protection.

[0013] From the above description of the structure of the utility model, it can be seen that the design starting point, concept and advantages of the utility model are: 1. By setting the mounting shell, cylinder, splint II, rack I, rack II and gear, the cylinder is turned on, and the telescopic rod of the cylinder is controlled to extend to make the upper side move inward, and the rack I, gear and rack II cooperate to make the splint II on the lower side move inward synchronously. The two splints II cooperate to contact the upper and lower edges of the printed circuit board respectively, thereby performing secondary clamping on the printed circuit board, effectively solving the problem of poor clamping effect of the existing clamping.

[0014] 2. By setting the guide rod II, the buffer plate and the spring, the buffer plate contacts the printed circuit board in advance and is squeezed to move outward, and the spring is compressed to exert pressure on the buffer plate, so that the buffer plate tightly clamps the printed circuit board to achieve a better clamping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a partial plan cross-sectional view of the workbench, motor, bidirectional screw and other components of the utility model.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the cylinder, clamping plate II, guide rod I and other components of the utility model.

[0018] Figure 4 It is a partial cross-sectional view of the components such as the clamping plate I, the spring and the buffer plate of the utility model.

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the rack I, gear and rack II of the utility model.

[0020] The markings of the components in the accompanying drawings are as follows: 1. Support foot, 2. Workbench, 21. Slide, 3. Motor, 4. Bidirectional screw, 41. Pulley assembly, 5. Clamp I, 7. Cylinder, 8. Clamp II, 9. Guide rod I, 10. Mounting shell, 11. Guide rod II, 12. Spring, 13. Buffer plate, 14. Rubber block, 15. Rack I, 16. Gear, 17. Rack II. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment: A clamping tool for patch, see Figure 1-Figure 5As shown, it includes a workbench 2, a support foot 1, a motor 3, a bidirectional screw rod 4, a pulley assembly 41 and a clamp plate Ⅰ5. The left and right sides of the bottom of the workbench 2 are connected to the support foot 1 by welding. The bottom of the support foot 1 is provided with a rubber pad for anti-skid. The top of the workbench 2 is provided with a left and right sliding groove 21. The right front side of the workbench 2 is connected to the motor 3 by bolts. The workbench 2 is internally rotatably connected to the front and rear bidirectional screw rods 4. A pulley assembly 41 is provided between the left ends of the two bidirectional screw rods 4. The output shaft of the motor 3 It penetrates into the workbench 2 and is connected to the bidirectional screw rod 4 on the front side through a coupling. A symmetrically distributed clamping plate Ⅰ5 is threadedly connected between the outsides of the two bidirectional screw rods 4. The clamping plate Ⅰ5 slides between the two longitudinally aligned slide grooves 21. The motor 3 is operated to make the bidirectional screw rod 4 on the front side drive the pulley assembly 41 to rotate, and the pulley assembly 41 drives the bidirectional screw rod 4 on the rear side to rotate synchronously to adjust the clamping distance of the two clamping plates Ⅰ5. It also includes a clamping mechanism. The clamping plate Ⅰ5 is provided with a clamping mechanism for secondary clamping of the printed circuit board.

[0023] See also Figure 1-Figure 5 As shown, the clamping mechanism includes a mounting shell 10, a cylinder 7, a clamping plate II 8, a guide rod I9, a rack I 15, a rack II 17 and a gear 16. The upper part of the clamping plate I 5 is connected to the mounting shell 10 by bolts, and the cylinders 7 distributed front and back are connected inside the mounting shell 10 by bolts. The mounting shell 10 is provided with a plurality of ventilation holes for heat dissipation. The telescopic rods of the two longitudinally aligned cylinders 7 are connected by welding. The clamping plate II 8 slides on the upper part of the clamping plate I 5, and another clamping plate II 8 is slidably connected to the lower part of the clamping plate I 5. The clamping plate I 5 and the front and rear sides of the movable plate II are welded. It is connected with a guide rod Ⅰ9, and a splint Ⅱ8 slides between the outsides of the two guide rods Ⅰ9. The upper splint Ⅱ8 is connected with a rack Ⅰ15 distributed front and rear by welding, and the lower splint Ⅱ8 is connected with a rack Ⅱ17 distributed front and rear by welding. The rack Ⅰ15 and the rack Ⅱ17 are respectively located on both sides of the gear 16 and mesh with each other. By controlling the extension of the telescopic rod of the cylinder 7, the upper splint Ⅱ8 drives the rack Ⅰ15 to move inward, the rack Ⅰ15 meshes with the gear 16, and the gear 16 rotates to mesh with the rack Ⅱ17, so that the rack Ⅱ17 drives the lower splint Ⅱ8 to move inward synchronously.

[0024] See also Figure 2 , Figure 4 and Figure 5As shown, it also includes a guide rod Ⅱ11, a buffer plate 13, a rubber block 14 and a spring 12. A plurality of guide rods Ⅱ11 distributed in a straight line are slidably connected to the clamping plate Ⅱ8. The buffer plate 13 is connected between the horizontally aligned guide rods Ⅱ11 by welding. The clamping surface of the buffer plate 13 is connected to a rubber block 14 for protection. The outside of the guide rod Ⅱ11 is provided with a spring 12 for applying pressure. The two ends of the spring 12 are respectively connected to the clamping plate Ⅰ5 and the clamping plate Ⅱ8.

[0025] First, the staff puts the printed circuit board to be mounted between the two clamping plates Ⅰ5, and then turns on the motor 3. The output shaft of the motor 3 rotates to drive the bidirectional screw rod 4 on the front side to rotate, so that it drives the pulley assembly 41 to rotate, and the pulley assembly 41 drives the bidirectional screw rod 4 on the rear side to rotate, so that the bidirectional screw rods 4 on the front and rear sides rotate synchronously, so that the two clamping plates Ⅰ5 move inward synchronously to contact the edges on the left and right sides of the printed circuit board, and then the printed circuit board is clamped for the first time, and then the cylinder 7 is turned on to control the telescopic rod of the cylinder 7 to extend, so that the clamping plate Ⅱ8 on the upper side drives the rack Ⅰ15 to move inward to mesh with the gear 16, and the gear 16 rotates to mesh with the rack Ⅱ17 The two clamps Ⅱ8 cooperate to contact the upper and lower edges of the printed circuit board respectively, and then perform secondary clamping on the printed circuit board, so as to achieve a good clamping effect and ensure the stability of the circuit board during the patch process. During the secondary clamping, the buffer plate 13 pre-contacts the printed circuit board and is squeezed outward, and the spring 12 is compressed to apply pressure to the buffer plate 13, so that the buffer plate 13 tightly clamps the printed circuit board to achieve a better clamping effect. The rubber block 14 plays a protective role to prevent the buffer plate 13 from damaging the surface of the printed circuit board. After the clamping is completed, the printed circuit board is patched.

[0026] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A clamping tool for patch, comprising a workbench (2), a supporting foot (1), a motor (3), a bidirectional screw rod (4), a pulley assembly (41) and a clamping plate I (5), wherein a plurality of supporting feet (1) are fixedly connected to the bottom of the workbench (2), a left-right distributed slide groove (21) is provided on the top of the workbench (2), a motor (3) is installed on the right front side of the workbench (2), a bidirectional screw rod (4) distributed front and back is rotatably connected inside the workbench (2), a pulley assembly (41) is arranged between the left ends of the two bidirectional screw rods (4), an output shaft of the motor (3) penetrates into the workbench (2) and is connected to the bidirectional screw rod (4) on the front side through a coupling, a symmetrically distributed clamping plate I (5) is threadedly connected between the outsides of the two bidirectional screw rods (4), and the clamping plate I (5) slides between two longitudinally aligned slide grooves (21), wherein the clamping plate I (5) is characterized in that: It also includes a clamping mechanism, and the clamping plate I (5) is provided with a clamping mechanism for secondary clamping of the printed circuit board.

2. A patch clamping tool according to claim 1, characterized in that: The clamping mechanism comprises a mounting shell (10), a cylinder (7), a clamping plate II (8), a rack I (15), a rack II (17) and a gear (16). The mounting shell (10) is mounted on the upper part of the clamping plate I (5). The cylinder (7) arranged front and rear is mounted inside the mounting shell (10). The clamping plate II (8) is fixedly connected between the telescopic rods of the two cylinders (7) aligned in the longitudinal direction. Another clamping plate II (8) is slidably connected to the lower part of the clamping plate I (5). The rack I (15) arranged front and rear is fixedly connected to the clamping plate II (8) on the upper side. The rack II (17) arranged front and rear is fixedly connected to the clamping plate II (8) on the lower side. The rack I (15) and the rack II (17) are both meshed with the gear (16).

3. A patch clamping tool according to claim 2, characterized in that: The bottom end of the supporting foot (1) is provided with a rubber pad for anti-slip.

4. A patch clamping tool according to claim 3, characterized in that: The mounting shell (10) is provided with a plurality of ventilation holes for heat dissipation.

5. A patch clamping tool according to claim 4, characterized in that: The invention also comprises a guide rod II (11), a buffer plate (13) and a spring (12); a plurality of guide rods II (11) are slidably connected to the clamping plate II (8); a buffer plate (13) is fixedly connected between the horizontally aligned guide rods II (11); and a spring (12) for applying pressure is sleeved outside the guide rod II (11).

6. A patch clamping tool according to claim 5, characterized in that: It also includes a guide rod I (9). The front and rear sides of the clamping plate I (5) and the movable plate II are fixedly connected with the guide rod I (9). The clamping plate II (8) slides between the outsides of the two guide rods I (9).

7. A patch clamping tool according to claim 6, characterized in that: It also includes a rubber block (14), and the clamping surface of the buffer plate (13) is connected to the rubber block (14) for protection.

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