Portable high-precision fast screwing tool

Abstract

This utility model discloses a portable, high-precision, and rapid screw-driving fixture, including a lower pressure plate. The upper end of the lower pressure plate has a limiting groove, and the front end of the lower pressure plate has a part-removing groove that communicates with the limiting groove. A connecting column is connected to the rear side of the upper end of the lower pressure plate. A locking nut and an adjusting screw are provided inside the upper front end of the connecting column, and a clamping seat is connected to it via the locking nut and adjusting screw. A clamping handle is rotatably connected to the upper front end of the clamping seat, and a guide slide is connected to the lower front end of the clamping seat. This utility model automatically compensates for the dimensional tolerances of the workpiece by setting compressible foam in the limiting groove of the lower pressure plate, ensuring accurate workpiece positioning. Combined with a four-corner linkage clamping mechanism and an elastic pressing component, it provides constant clamping force to prevent workpiece loosening. Simultaneously, the double positioning slide rods cooperate with the slide groove to ensure precise alignment of the upper and lower pressure plates, making the upper and lower parts of the workpiece fit tightly together and the threaded holes precisely aligned.

Description

Technical Field

[0001] This utility model relates to the field of screw assembly, and in particular to a portable, high-precision, and fast screw-driving fixture. Background Technology

[0002] In traditional screw assembly operations, especially for connecting and fixing precision workpieces consisting of upper and lower parts, there are common problems such as insufficient positioning accuracy, low operating efficiency, and poor adaptability.

[0003] Existing tooling often uses rigid positioning structures, which makes it difficult to compensate for dimensional deviations caused by workpiece machining tolerances, and easily leads to inaccurate alignment of threaded holes. At the same time, traditional fixtures lack effective elastic clamping mechanisms, which can easily cause workpiece surface damage or uneven clamping force during the pressing process, affecting assembly quality.

[0004] In addition, the guide structure of conventional tooling is usually designed with a single hole diameter, which cannot accommodate screws of different sizes. When replacing them, the entire tooling needs to be disassembled and adjusted, which seriously affects work efficiency.

[0005] To address the aforementioned issues, this patent proposes a high-precision screw-driving fixture with automatic compensation function, rapid adaptation to multiple specifications, and convenient operation, in order to solve the problems of large positioning errors, low efficiency, and poor versatility in traditional assembly methods. Utility Model Content

[0006] The main purpose of this invention is to propose a portable, high-precision, and fast screw-driving fixture, which aims to solve the problem that traditional screw-driving fixtures usually adopt a single hole diameter design and cannot adapt to screws of different specifications.

[0007] To address the aforementioned problems, this utility model proposes a portable, high-precision, and rapid screw-driving fixture, comprising a lower pressure plate. The upper end of the lower pressure plate has a limit slot, and the front end of the lower pressure plate has a part-removing slot communicating with the limit slot. A connecting column is connected to the rear side of the upper end of the lower pressure plate. A locking nut and an adjusting screw are provided inside the upper front side of the connecting column, and a clamping seat is connected to it via the locking nut and adjusting screw. A clamping handle is rotatably connected to the upper front side of the clamping seat, and a guide slide is connected to the lower lower front side of the clamping handle. A connecting hinge is rotatably connected to the lower front end of the clamping handle, and a limit rod is rotatably connected to the lower end of the connecting hinge. The rod is inserted into the guide cylinder and slidably connected to it. The lower end of the limiting rod is connected to a connecting stud, and an elastic pressing component is provided between the limiting rod and the connecting stud. The lower end of the connecting stud is threadedly connected to an upper pressure plate and fixed by a fastening nut. The workpiece is engaged inside the limiting slot, and the upper pressure plate presses against the upper end of the workpiece. The workpiece consists of two parts, upper and lower, and each part has threaded holes at its four corners. The two parts are connected by threaded holes and screws. Each of the four corners of the upper pressure plate has a guiding component, and the four guiding components are located directly above the four threaded holes of the workpiece.

[0008] Preferably, the lower pressure plate is connected to the left front corner and the upper right rear corner, and the upper pressure plate is provided with positioning slide grooves at the left front corner and the upper right rear corner, and the two positioning slide rods are slidably connected inside the two positioning slide grooves respectively.

[0009] Preferably, the guiding component includes a guiding hole and an adjusting rotating seat. Positioning blocks are connected to the four corners of the lower end of the upper pressure plate. Adjusting grooves are opened inside the four corners of the upper pressure plate, and the lower ends of the four adjusting grooves are respectively inserted into the four positioning blocks.

[0010] Preferably, a limiting retaining ring is connected at the middle of the inner wall of the adjusting groove cylinder, and an adjusting rotating seat is rotatably connected inside the adjusting groove. A limiting ring groove is formed on the outer wall of the adjusting rotating seat cylinder, and the limiting retaining ring is rotatably connected inside the limiting ring groove.

[0011] Preferably, the adjusting rotary seat has multiple guide holes running vertically through its interior, and the diameters of the multiple guide holes are all different. The inner wall of the limiting ring cylinder has multiple locking holes arranged in a hemispherical shape, and the number of the multiple locking holes is the same as the number of the multiple guide holes.

[0012] Preferably, the connection points between the multiple locking holes and the inner wall of the limiting ring are all treated with arc surfaces, and the inner wall of the cylindrical limiting ring groove is provided with a telescopic hole, and a locking head is slidably connected to the telescopic hole at one end near the limiting ring groove.

[0013] Preferably, the locking head protrudes inside the limiting ring groove, and the end of the locking head near the limiting ring groove is hemispherical. The end of the locking head away from the limiting ring groove is provided with a locking spring, which is elastically connected to the telescopic hole through the locking spring.

[0014] Preferably, the elastic pressing component includes a limiting slider and a pre-compression spring. The lower end of the limiting rod has a convex pre-compression groove, and the connecting stud is inserted into the pre-compression groove. The upper end of the connecting stud is connected to the limiting slider, and the limiting slider is slidably connected inside the pre-compression groove.

[0015] Preferably, the upper end of the pre-compression groove is connected to a spring groove, a pre-compression spring is provided inside the spring groove, and the limiting slider is located at the lower end of the pre-compression spring and is elastically connected to the inside of the pre-compression groove through the pre-compression spring.

[0016] Beneficial effects:

[0017] 1. This utility model automatically compensates for the dimensional tolerances of the workpiece by setting compressible foam in the limiting groove of the lower pressure plate, ensuring accurate workpiece positioning; in conjunction with the four-corner linkage clamping mechanism and the elastic pressing component, it provides constant clamping force to prevent the workpiece from loosening. At the same time, the double positioning slide rod cooperates with the slide groove to ensure the precise alignment of the upper and lower pressure plates, so that the upper and lower parts of the workpiece fit tightly together and the threaded holes are precisely aligned.

[0018] 2. The upper pressure plate of this utility model is equipped with rotatable adjustment seats at the four corners. Each seat integrates multiple guide holes of different diameters, which can be quickly adjusted according to the screw size to ensure that the screw is accurately inserted into the threaded hole. The elastic cooperation between the locking head and the locking hole realizes the positioning and locking of the guide hole, avoiding deviation during screw driving and improving assembly accuracy and efficiency.

[0019] 3. The limiting pressure rod of this utility model is equipped with a pre-compression spring inside, which provides buffer when pressing the workpiece to prevent hard contact damage to the workpiece surface, while maintaining a stable clamping force to ensure that the upper and lower parts of the workpiece fit tightly together and avoid misalignment caused by loosening of screws when tightening.

[0020] 4. This utility model uses a pressure lever to drive the limiting pressure rod to move downward, which in turn drives the upper pressure plate to quickly press the workpiece, making operation convenient; the workpiece removal slot design allows the workpiece to be easily removed after assembly, improving work efficiency.

[0021] 5. The adjusting base of the guide assembly of this utility model adopts a rotatable design, which supports the quick switching of screws of different specifications, and is fixed by a locking mechanism to ensure that the guide hole and the threaded hole are accurately aligned, adapting to various screw assembly needs and improving the versatility and flexibility of the tooling.

[0022] 6. This utility model of portable high-precision fast screw-driving tool is small in size and light in weight, and is suitable for small-batch trial production of small products. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the screw-driving fixture of this utility model;

[0025] Figure 2 This is a schematic diagram of the left-side cross-sectional structure of the screw-driving fixture of this utility model;

[0026] Figure 3 This is a schematic diagram of the guiding component structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the upper pressure plate connection structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the adjustment rotary seat connection structure of this utility model;

[0029] Figure 6 This is a schematic diagram of the elastic pressing component structure of this utility model.

[0030] The annotations in the attached figures are explained as follows:

[0031] 1. Lower pressure plate; 2. Part removal slot; 3. Connecting column; 4. Fixture base; 5. Fixture handle; 6. Guide slide; 7. Connecting hinge; 8. Limiting pressure rod; 9. Connecting stud; 10. Upper pressure plate; 11. Workpiece to be machined; 12. Guide hole; 13. Positioning slide rod; 14. Positioning slide groove; 15. Positioning pressure block; 16. Adjusting slot; 17. Limiting retaining ring; 18. Locking retaining hole; 19. Adjusting base; 20. Limiting ring groove; 21. Telescopic hole; 22. Locking retaining head; 23. Locking spring; 24. Preload slide groove; 25. Limiting slider; 26. Spring groove; 27. Preload spring; 28. Foam; 29. ​​Adjusting screw; 30. Locking nut. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To achieve the above-mentioned utility model objectives, such as Figures 1-6 As shown, this utility model provides a portable, high-precision, and fast screw-driving fixture, including a lower pressure plate 1. A limit slot is formed at the upper end of the lower pressure plate 1, and a part-removing slot 2 is formed at the front end of the lower pressure plate 1, which communicates with the limit slot. A connecting column 3 is connected to the rear side of the upper end of the lower pressure plate 1. A locking nut 30 and an adjusting screw 29 are provided inside the upper front side of the connecting column 3, and a clamping seat 4 is connected to it via the locking nut 30 and the adjusting screw 29. A clamping handle 5 is rotatably connected to the upper front side of the clamping seat 4, and a guide slide 6 is connected to the lower front side of the clamping seat 4. The clamping handle 5 is located at the lower front side of the front end of the clamping seat 4. A connecting hinge 7 is rotatably connected, and a limiting rod 8 is rotatably connected to the lower end of the connecting hinge 7. The limiting rod 8 is inserted into the guide cylinder 6 and slidably connected to the guide cylinder 6. A connecting stud 9 is connected to the lower end of the limiting rod 8, and an elastic pressing component is provided between the limiting rod 8 and the connecting stud 9. An upper pressure plate 10 is threadedly connected to the lower end of the connecting stud 9 and is fixed by a fastening nut. A workpiece 11 is engaged inside the limiting slot, and the upper pressure plate 10 presses against the upper end of the workpiece 11. The workpiece 11 consists of two separate parts, and the interior of each of the four corners of the two parts is open. The upper pressure plate 10 has threaded holes, and the two parts are connected by screws through the threaded holes. Guide components are installed inside each of the four corners of the upper pressure plate 10, and these four guide components are located directly above the four threaded holes of the workpiece 11. Positioning blocks 15 are connected to the four corners of the lower end of the upper pressure plate 10. During the screwing process on the workpiece 11, the workpiece 11 is connected by screws using a screw-driving fixture. This screw-driving fixture is small, lightweight, and easy to carry. It engages the upper and lower parts of the workpiece 11 into the limiting slots at the upper end of the lower pressure plate 1, and the four limiting slots... Compressible foam 28 is attached to the side walls to compensate for gaps caused by changes in the size of the workpiece 11 and to avoid positional errors. The front end of the clamping handle 5 is pressed down, causing the clamping handle 5 to rotate downwards. The limiting pressure rod 8 is driven to slide downwards inside the guide cylinder 6 through the connecting hinge 7. The limiting pressure rod 8 then drives the upper pressure plate 10 to move downwards through the connecting stud 9. The upper pressure plate 10 is pressed tightly against the four corners of the upper end of the workpiece 11 by the positioning pressure blocks 15 set at the four corners of the lower end, pressing the two parts of the workpiece 11 together and aligning the threaded holes at the four corners of the two parts.

[0034] At this time, the limiting pressure rod 8 can elastically pre-press the connecting stud 9, the upper pressure plate 10 and the positioning pressure block 15 through the elastic pressing component. This ensures that the four positioning pressure blocks 15 are tightly pressed at the four corners of the upper end of the workpiece 11, and also prevents the workpiece 11 from loosening with the positioning pressure block 15. This ensures that the two parts of the workpiece 11 fit tightly together. At the same time, the upper pressure plate 10 can guide the screw to the threaded hole at the four corners of the workpiece 11 through the guiding component, and position the screw and the threaded hole so that the screw can be accurately connected inside the threaded hole between the two parts. This connects the two parts of the workpiece 11. After the two parts are connected, the upper pressure plate 10 is lifted and the workpiece 11 is taken out through the part removal slot 2.

[0035] Preferably, positioning slide rods 13 are connected to the upper left front corner and the upper right rear corner of the lower pressure plate 1, and positioning slide grooves 14 are provided at the upper left front corner and the upper right rear corner of the upper pressure plate 10. The two positioning slide rods 13 are slidably connected inside the two positioning slide grooves 14 respectively. During the downward movement of the upper pressure plate 10, the upper pressure plate 10 can be positioned with the lower pressure plate 1 through the positioning slide rods 13 and the positioning slide grooves 14, ensuring that the four positioning blocks 15 connected at the four corners of the lower end of the upper pressure plate 10 can be accurately pressed on the four corners of the upper end of the workpiece 11, thereby positioning the guide assembly and the threaded hole inside the workpiece 11.

[0036] Preferably, the guiding assembly includes guide holes 12 and adjusting rotating bases 19. Adjusting rotating grooves 16 are formed inside each of the four corners of the upper pressure plate 10, and the lower ends of the four adjusting rotating grooves 16 respectively pass through the interiors of four positioning pressure blocks 15. A limiting retaining ring 17 is connected to the middle of the cylindrical inner wall of the adjusting rotating groove 16. The adjusting rotating base 19 is rotatably connected inside the adjusting rotating groove 16. A limiting ring groove 20 is formed on the cylindrical outer wall of the adjusting rotating base 19, and the limiting retaining ring 17 is rotatably connected inside the limiting ring groove 20. Multiple guide holes 12 are formed vertically through the adjusting rotating base 19, and the diameters of the multiple guide holes 12 are all different. Multiple hemispherical locking holes 18 are formed on the cylindrical inner wall of the limiting retaining ring 17. The number of locking holes 18 is the same as the number of guide holes. The number of guide holes 12 is the same. During the process of fixing the two parts of the workpiece 11, since the multiple guide holes 12 are evenly distributed around the central axis of the adjusting rotary seat 19, the adjusting rotary seat 19 can rotate the guide holes 12 of the corresponding size according to the size of the screw used in the threaded hole to be directly above the threaded hole inside the workpiece 11. This can prevent the diameter of the guide hole 12 from being too small so that the screw cannot pass through, ensuring that the screw can pass smoothly through the inside of the guide hole 12 to fix the two parts. It can also prevent the diameter of the guide hole 12 from being too large so that the screw and the threaded hole are not accurately positioned. In addition, the adjusting rotary seat 19 can be limited by the limiting ring 17 and the limiting ring groove 20 to the adjusting groove 16, preventing the adjusting rotary seat 19 from falling out of the adjusting groove 16.

[0037] Preferably, the connection points between the multiple locking holes 18 and the inner wall of the limiting ring 17 are all arc-shaped. A telescopic hole 21 is provided on the cylindrical inner wall of the limiting ring groove 20. A locking head 22 is slidably connected to the end of the telescopic hole 21 near the limiting ring groove 20. The locking head 22 protrudes inside the limiting ring groove 20, and the end of the locking head 22 near the limiting ring groove 20 is hemispherical. A locking spring 23 is provided at the end of the locking head 22 away from the limiting ring groove 20, and is elastically connected to the telescopic hole 21 through the locking spring 23. During the adjustment of the guide hole 12, the guide hole 12 can be adjusted in position by rotating the adjusting rotary seat 19. The adjusting rotary table 19 can be limited to the adjusting groove 16 through the locking hole 18 and the locking head 22. When the adjusting rotary table 19 is rotated, it drives multiple guide holes 12 and the limiting ring 17 to rotate together. When the guide hole 12 of the corresponding diameter rotates to the top of the threaded hole, the locking head 22 rotates to the inside of the corresponding locking hole 18 and is locked into the locking hole 18 under the action of the locking spring 23, thereby locking the position of the adjusting rotary table 19 and the position of the guide hole 12, ensuring accurate positioning between the guide hole 12 and the threaded hole, and ensuring accurate positioning between the guide hole 12 and the screw and the threaded hole.

[0038] Furthermore, when the guide hole 12 is repositioned, the adjusting base 19 is rotated forcefully. Since the connection between the inner wall of the locking hole 18 and the limiting ring 17 is arc-shaped, and the locking head 22 is hemispherical at the end near the limiting ring groove 20, the locking head 22 can be smoothly ejected from the inside of the locking hole 18, releasing the lock between the adjusting groove 16 and the adjusting base 19, ensuring that the adjusting base 19 can rotate smoothly, and ensuring that the position of the guide hole 12 can be adjusted again.

[0039] Preferably, the elastic pressing assembly includes a limiting slider 25 and a preload spring 27. A convex preload groove 24 is formed inside the lower end of the limiting rod 8, and a connecting stud 9 is inserted into the preload groove 24. The upper end of the connecting stud 9 is connected to the limiting slider 25, which is slidably connected inside the preload groove 24. The upper end of the preload groove 24 is connected to a spring groove 26, and a preload spring 27 is installed inside the spring groove 26. The limiting slider 25 is located at the lower end of the preload spring 27 and is elastically connected inside the preload groove 24 through the preload spring 27. When the four positioning blocks 15 are attached to the four corners of the upper end of the workpiece 11, the four positioning blocks 15 stop moving downwards. This causes the connecting stud 9 and the upper pressure plate 10 to stop moving downwards. At this time, the limiting pressure rod 8 continues to slide downwards, causing the limiting pressure rod 8 to slide downwards outside the upper end of the connecting stud 9, and allowing the limiting slider 25 to slide upwards inside the pre-pressure groove 24. At the same time, it compresses the pre-pressure spring 27. The limiting pressure rod 8 can elastically squeeze the upper pressure plate 10 and the positioning pressure block 15 of the connecting stud 9 through the reaction force of the pre-pressure spring 27. This can prevent the positioning pressure block 15 from making hard contact with the workpiece 11 and causing damage to the workpiece 11, and also prevent the positioning pressure block 15 from loosening with the workpiece 11 and causing the two parts of the workpiece 11 to not fit tightly together, ensuring that the two parts can be tightly connected.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A portable, high-precision, and rapid screw-driving fixture, characterized in that, The device includes a lower pressure plate (1), with a limit slot at the upper end of the lower pressure plate (1) and a part-removing slot (2) at the front end of the lower pressure plate (1), which communicates with the limit slot. A connecting column (3) is connected to the rear side of the upper end of the lower pressure plate (1). A locking nut (30) and an adjusting screw (29) are provided inside the upper side of the front end of the connecting column (3), and a clamp seat (4) is connected to it through the locking nut (30) and the adjusting screw (29). A clamp handle (5) is rotatably connected to the upper side of the front end of the clamp seat (4), and a guide slide (6) is connected to the lower side of the front end of the clamp seat (4). A connecting hinge (7) is rotatably connected to the front side of the lower end of the clamp handle (5), and a limit rod (8) is rotatably connected to the lower end of the connecting hinge (7), and the limit rod (8) is inserted into the guide slide. The limit rod (8) is connected to the lower end of the guide cylinder (6) and is connected to the connecting stud (9). An elastic pressing component is provided between the limit rod (8) and the connecting stud (9). The lower end of the connecting stud (9) is threadedly connected to the upper pressure plate (10) and fixed by a fastening nut. The workpiece (11) is engaged inside the limit slot, and the upper pressure plate (10) presses on the upper end of the workpiece (11). The workpiece (11) is composed of two parts, and threaded holes are opened inside the four corners of the two parts. The two parts are connected by threaded holes and screws. The upper pressure plate (10) is provided inside the four corners of the four parts, and the four guiding components are located directly above the four threaded holes of the workpiece (11).

2. The portable, high-precision, and rapid screw-driving fixture as described in claim 1, characterized in that, The lower pressure plate (1) is connected to a positioning slide rod (13) at the upper left front corner and the upper right rear corner. The upper pressure plate (10) is provided with a positioning slide groove (14) at the upper left front corner and the upper right rear corner. The two positioning slide rods (13) are slidably connected inside the two positioning slide grooves (14).

3. The portable, high-precision, and rapid screw-driving fixture as described in claim 1, characterized in that, The guiding component includes a guiding hole (12) and an adjusting rotating seat (19). The upper pressure plate (10) is connected to four positioning blocks (15) at the four corners of its lower end. The upper pressure plate (10) is provided with adjusting rotating grooves (16) at the four corners of its lower end, and the lower ends of the four adjusting rotating grooves (16) are respectively inserted into the four positioning blocks (15).

4. The portable, high-precision, and rapid screw-driving fixture as described in claim 3, characterized in that, A limiting ring (17) is connected to the middle of the inner wall of the cylindrical rotating groove (16). An adjusting rotating seat (19) is rotatably connected inside the adjusting rotating groove (16). A limiting ring groove (20) is opened on the outer wall of the cylindrical rotating seat (19), and the limiting ring (17) is rotatably connected inside the limiting ring groove (20).

5. The portable, high-precision, and rapid screw-driving fixture as described in claim 4, characterized in that, The adjusting rotary seat (19) has multiple guide holes (12) running through its interior, and the diameters of the multiple guide holes (12) are all different. The inner wall of the cylindrical retaining ring (17) has multiple locking holes (18) arranged in a hemispherical shape, and the number of the multiple locking holes (18) is the same as the number of the multiple guide holes (12).

6. The portable, high-precision, and rapid screw-driving fixture as described in claim 5, characterized in that, The connection points between the locking holes (18) and the inner wall of the limiting ring (17) are all treated with arc surfaces. The inner wall of the cylindrical limiting ring groove (20) is provided with a telescopic hole (21). A locking head (22) is slidably connected to the telescopic hole (21) at one end near the limiting ring groove (20).

7. The portable, high-precision, and rapid screw-driving fixture as described in claim 6, characterized in that, The locking head (22) protrudes inside the limiting ring groove (20), and the end of the locking head (22) near the limiting ring groove (20) is hemispherical. The end of the locking head (22) away from the limiting ring groove (20) is provided with a locking spring (23), and is elastically connected to the telescopic hole (21) through the locking spring (23).

8. The portable, high-precision, and rapid screw-driving fixture as described in claim 1, characterized in that, The elastic pressing assembly includes a limiting slider (25) and a pre-pressing spring (27). The lower end of the limiting pressure rod (8) has a "convex" shaped pre-pressing groove (24), and the connecting stud (9) is inserted into the pre-pressing groove (24). The upper end of the connecting stud (9) is connected to the limiting slider (25), and the limiting slider (25) is slidably connected inside the pre-pressing groove (24).

9. The portable, high-precision, and rapid screw-driving fixture as described in claim 8, characterized in that, The upper end of the pre-compression groove (24) is connected to a spring groove (26), and a pre-compression spring (27) is provided inside the spring groove (26). The limiting slider (25) is located at the lower end of the pre-compression spring (27) and is elastically connected to the inside of the pre-compression groove (24) through the pre-compression spring (27).

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