Self-centering mounting jig
By designing a self-centering installation fixture, the workpiece can be quickly and accurately positioned using an adjustment mechanism and limit blocks. This solves the problems of insufficient positioning accuracy and cumbersome clamping of existing fixtures, thereby improving processing efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-03-27
AI Technical Summary
Existing fixtures have insufficient positioning accuracy, cumbersome clamping process, and poor adaptability to workpieces of different specifications, which affects machining accuracy and efficiency.
Design a self-centering mounting fixture that achieves self-centering positioning of the workpiece through adjustment mechanisms and limit blocks on two base plates, and realizes rapid clamping and precise positioning of the workpiece by using the cooperation of hand-tightening screws and return springs.
It improves the efficiency and accuracy of workpiece clamping, and enhances the processing quality of products.
Smart Images
Figure CN121733467A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mechanical fixture technology, and specifically to a self-centering mounting fixture. Background Technology
[0002] In machining, inspection, and assembly processes, workpiece positioning using fixtures is a crucial step in ensuring machining accuracy and production efficiency. Existing fixtures typically employ screw clamping or unilateral limiting methods for clamping and positioning, which have the following drawbacks: insufficient positioning accuracy, workpiece eccentricity, and consequently, affecting product machining accuracy; cumbersome clamping process requiring frequent adjustments to the workpiece's installation position, leading to low machining efficiency; and poor adaptability to workpieces of different specifications, necessitating frequent fixture replacements.
[0003] Therefore, there is an urgent need for a fixture that can quickly clamp and automatically center the components to solve the above problems. Summary of the Invention
[0004] The purpose of this invention is to provide a self-centering mounting fixture that can effectively solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A self-centering mounting fixture includes two base plates, referred to as the first base plate and the second base plate, which are combined to form a circular mounting hole with semi-circular mounting holes on the two base plates. Multiple adjustment mechanisms are distributed on the base plates. Each adjustment mechanism includes a hand-tightening screw, a cap-shaped fixing seat, an inner support block fixing seat, a pin, an open retaining spring, an inner support block, a return spring, and a spring fixing screw. The inner support block fixing seat is located below the cap-shaped fixing seat and has a first opening groove at its bottom. Two inner support blocks are symmetrically arranged in the first opening groove. The pin passes through the inner support block fixing seat and has an open retaining spring at one end. A spring fixing screw is located at the bottom of the inner support block. The two ends of the return spring are respectively mounted on the spring fixing screws on the two inner support blocks. The hand-tightening screw is threadedly connected to the cap-shaped fixing seat. The substrate is provided with multiple limiting blocks and through holes. The inner support block of the adjustment mechanism is disposed in the through hole and the adjustment mechanism is detachably connected to the substrate. The two substrates are placed on the mounting base plate, and the adjustment mechanism on the substrate is correspondingly placed into the positioning hole on the mounting base plate, and the inner support block on the adjustment mechanism passes through the positioning hole. The hand screw is rotated so that the end of the hand screw contacts the two inner support blocks until the two inner support blocks are pushed to rotate outward and open, and the two inner support blocks are symmetrically pressed against the inner side wall of the positioning hole. The central axis of the disc workpiece disposed on the multiple limiting blocks is collinear with the central axis of the mounting hole of the mounting base plate.
[0006] Preferably, the limiting block is provided with a limiting surface with an arc structure, and the limiting surfaces on multiple limiting blocks work together to position the disc workpiece.
[0007] Preferably, both sides of the inner support block fixing seat are provided with mounting planes, and the end of the pin and the open snap ring are respectively attached to the mounting planes on both sides of the inner support block fixing seat.
[0008] Preferably, a fixing piece is provided between the cap-shaped fixing seat and the inner support block fixing seat, and the fixing piece is connected to the base plate.
[0009] Preferably, the fixing plate has symmetrically arranged arc-shaped mounting grooves on both sides, and one end of the fixing screw passes through the threaded hole on the substrate along the mounting groove to fix the fixing plate on the substrate.
[0010] Preferably, the cap-shaped fixing seat, the inner support block fixing seat, and the fixing piece are integrally formed.
[0011] Preferably, each of the two substrates has a positioning boss at both ends, and the positioning boss on the first substrate and the positioning boss on the second substrate are connected by fastening screws.
[0012] Preferably, a handle is mounted on the substrate, and the handles on the two substrates are arranged in parallel.
[0013] Compared with the prior art, the beneficial effects of the present invention are: First, the self-centering mounting fixture of this invention is assembled. The first substrate and the second substrate are combined so that the semi-circular mounting holes on the two substrates form circular mounting holes. Then, the first substrate and the second substrate are fixedly connected. Next, the adjustment mechanism is placed in the through hole on the substrate, and the fixing plate between the cap-shaped fixing seat and the inner support block fixing seat connects the substrate to fix the adjustment mechanism to the substrate. Taking the assembly of the mounting base plate and the disc workpiece as an example, before the workpiece is clamped and installed, the two substrates are placed on the mounting base plate. The adjustment mechanism fixed on the substrate is placed into the positioning hole on the mounting base plate, and the inner support block on the adjustment mechanism passes through the positioning hole. The hand screw is rotated so that the end of the hand screw contacts the two inner support blocks until the two inner support blocks are pushed to rotate outward around the pin and open, so that the two inner support blocks are symmetrically pressed against the inner wall of the positioning hole. At the same time, the tension spring fixing screws on the bottom of the two inner support blocks stretch the reset tension springs to both sides. At this time, the self-centering mounting fixture of this invention is fixed on the mounting base plate. Furthermore, when the hand-tightening screw is rotated, the two symmetrically arranged inner support blocks on the adjustment mechanism simultaneously rotate outward around the pin, thereby causing the two inner support blocks to symmetrically press against the positioning holes. Since multiple through holes are distributed in a circular array on the two combined base plates, and multiple positioning holes on the mounting base plate are distributed in a circular array around the clamping hole at the center of the mounting base plate, when the two inner support blocks on each adjustment mechanism are positioned in the corresponding positioning holes, the self-centering positioning of the mounting base plate and the disc workpiece is achieved. This makes the central axis of the disc workpiece positioned on the multiple limit blocks collinear with the central axis of the mounting hole on the mounting base plate. After the disc workpiece is positioned and installed on the mounting base plate, the hand-tightening screw is rotated in the opposite direction until the end of the hand-tightening screw disengages from the contact surface of the two inner support blocks. At this time, the return spring contracts to close the inner support blocks. The fixing screw is removed, the adjustment structure is taken off, and the first base plate and the second base plate are disassembled and removed from both sides of the disc workpiece. The clamping is completed. This invention is beneficial to improving the clamping efficiency of the workpiece and also improves the clamping accuracy of the workpiece, thereby improving the processing quality of the product. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the first installation perspective of the self-centering installation fixture, the mounting base plate, and the disc workpiece. Figure 2 This is a schematic diagram of the second mounting perspective of the self-centering mounting fixture, mounting base plate, and disc workpiece. Figure 3 This is a schematic diagram of the installation of the self-centering mounting fixture and the mounting base plate in this invention; Figure 4 This is a first-view schematic diagram of the self-centering mounting fixture in this invention; Figure 5 This is a second-view schematic diagram of the self-centering mounting fixture in this invention; Figure 6This is a schematic diagram of the structure of the disc workpiece in this invention; Figure 7 This is a first-view schematic diagram of the adjustment mechanism in this invention; Figure 8 This is a second-view schematic diagram of the adjustment mechanism in this invention; Figure 9 This is a third-view schematic diagram of the adjustment mechanism in this invention; In the figure, 1. First substrate, 2. Second substrate, 3. Limiting block, 31. Hand screw, 32. Cap-shaped fixing seat, 33. Inner support block fixing seat, 34. Pin, 35. Opening snap ring, 36. Inner support block, 37. Reset tension spring, 38. Tension spring fixing screw, 39. Fixing plate, 4. Adjustment mechanism, 5. Handle, 6. Fixing screw, 7. First opening groove, 8. Through hole, 9. Positioning boss, 10. Mounting base plate, 11. Positioning hole, 12. Mounting hole, 13. Disc workpiece, 14. Mounting groove. Detailed Implementation
[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0016] Please see Figure 1-9 As shown, a self-centering mounting fixture includes two base plates, referred to as the first base plate 1 and the second base plate 2. The two base plates are combined such that the semi-circular mounting inner holes on the two base plates form a circular mounting inner hole. Multiple adjustment mechanisms 4 are distributed on the base plates. Each adjustment mechanism 4 includes a hand screw 31, a cap-shaped fixing seat 32, an inner support block fixing seat 33, a pin 34, an open retaining spring 35, an inner support block 36, a reset tension spring 37, and a tension spring fixing screw 38. The inner support block fixing seat 33 is located below the cap-shaped fixing seat 32 and has a first opening groove 7 at its bottom. Two inner support blocks 36 are symmetrically arranged in the first opening groove 7. The pin 34 passes through the inner support block fixing seat 33 and has an open retaining spring 35 at one end. The bottom of the inner support block 36 is provided with a tension spring fixing screw 38. The two ends of the reset tension spring 37 are respectively installed on the tension spring fixing screws 38 on the two inner support blocks 36. The hand screw 31 is threadedly connected to the cap-shaped fixing seat 32. The substrate is provided with multiple limiting blocks 3 and through holes 8. The inner support block 36 on the adjustment mechanism 4 is disposed in the through hole 8 and the adjustment mechanism 4 is detachably connected to the substrate. The two substrates are placed on the mounting base plate, and the adjustment mechanism 4 on the substrate is correspondingly placed into the positioning hole 11 on the mounting base plate 10. The inner support block 36 on the adjustment mechanism 4 passes through the positioning hole 11. The hand screw 31 is rotated so that the end of the hand screw 31 contacts the two inner support blocks 36 until the two inner support blocks 36 are pushed to rotate outward and open, and the two inner support blocks 36 are symmetrically pressed against the inner side wall of the positioning hole 11. The central axis of the disc workpiece disposed on the multiple limiting blocks 3 is collinear with the central axis of the mounting hole 12 of the mounting base plate 10. The limiting block 3 is provided with a limiting surface with an arc structure, and the limiting surfaces on multiple limiting blocks 3 work together to position the disc workpiece.
[0017] The inner support block fixing seat 33 has mounting planes on both sides, and the end of the pin 34 and the open snap ring 35 are respectively attached to the mounting planes on both sides of the inner support block fixing seat 33.
[0018] A fixing piece 39 is provided between the cap-shaped fixing seat 32 and the inner support block fixing seat 33, and the fixing piece 39 is connected to the base plate.
[0019] The fixing plate 39 has symmetrically arranged arc-shaped mounting grooves 14 on both sides. One end of the fixing screw 6 passes through the threaded hole on the substrate along the mounting groove 14 and fixes the fixing plate 39 to the substrate.
[0020] The cap-shaped fixing seat 32, the inner support block fixing seat 33, and the fixing piece 39 are integrally formed structures.
[0021] Both ends of the two substrates are provided with positioning bosses 9, and the positioning bosses 9 on the first substrate 1 and the positioning bosses 9 on the second substrate 2 are connected by fastening screws.
[0022] A handle 5 is mounted on the substrate, and the handles 5 on the two substrates are arranged in parallel.
[0023] First, the self-centering mounting fixture of this invention is assembled by combining the first substrate 1 and the second substrate 2 so that the semi-circular mounting inner holes on the two substrates form a circular mounting inner hole. Then, the first substrate 1 and the second substrate 2 are fixedly connected. Next, the adjustment mechanism 4 is placed in the through hole 8 on the substrate, and the fixing piece 39 between the cap-shaped fixing seat 32 and the inner support block fixing seat 33 is connected to the substrate to fix the adjustment mechanism 4 on the substrate. Taking the assembly of the mounting base plate 10 and the disc workpiece 13 as an example, before the workpiece is clamped and installed, the two substrates are placed on the mounting base plate 10 and fixed. The adjustment mechanism 4 on the substrate is placed into the positioning hole 11 on the mounting base plate 10, and the inner support block 36 on the adjustment mechanism 4 is inserted into the positioning hole 11. The hand screw 31 is rotated so that the end of the hand screw 31 contacts the two inner support blocks 36 until the two inner support blocks 36 are pushed to rotate outward around the pin 34 and open, so that the two inner support blocks 36 are symmetrically pressed against the inner side wall of the positioning hole 11. At the same time, the tension spring fixing screws 38 on the bottom of the two inner support blocks 36 stretch the reset tension spring 37 to both sides. At this time, the self-centering mounting fixture in the present invention is fixed on the mounting base plate 10. When the hand-tightening screw 31 is rotated, the two symmetrically arranged inner support blocks 36 on the adjusting mechanism 4 simultaneously rotate outward around the pin 34, thereby causing the two inner support blocks 36 to symmetrically press against the positioning holes 11. Since multiple through holes 8 are distributed in a ring array on the two assembled base plates, and multiple positioning holes 11 on the mounting base plate 10 are distributed in a ring array around the mounting hole 12 at the center of the mounting base plate 10, when the two inner support blocks 36 on each adjusting mechanism 4 are correspondingly positioned in the positioning holes 11, the mounting base plate 10 and the disc workpiece 13 achieve self-centering positioning, thereby enabling the positioning of multiple... The central axis of the disc workpiece 13 on the limiting block 3 is collinear with the central axis of the mounting hole 12 on the mounting base plate 10. After the disc workpiece 13 is positioned and installed on the mounting base plate 10, the hand screw 31 is rotated in the opposite direction until the end of the hand screw 31 disengages from the contact surface of the two inner support blocks 36. At this time, the reset spring 37 contracts to close the inner support blocks 36. The fixing screw 6 is removed, the adjustment structure 4 is taken off, and the first base plate 1 and the second base plate 2 are disassembled and removed from both sides of the disc workpiece. The clamping is completed. This invention is beneficial to improving the clamping efficiency of the workpiece and also improves the clamping accuracy of the workpiece, thereby improving the processing quality of the product.
[0024] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.
Claims
1. A self-centering mounting fixture, characterized in that: It includes two substrates, referred to as the first substrate (1) and the second substrate (2), and the two substrates are combined to form a circular mounting hole with a semi-circular structure on the two substrates. Multiple adjustment mechanisms (4) are distributed on the substrates. The adjustment mechanism (4) includes a hand-tightening screw (31), a cap-shaped fixing seat (32), an inner support block fixing seat (33), a pin (34), an open snap ring (35), an inner support block (36), a reset tension spring (37), and a tension spring fixing screw (38). The inner support block fixing seat (33) is located below the cap-shaped fixing seat (32) and has a first opening groove (7) at the bottom. Two inner support blocks (36) are symmetrically arranged in the first opening groove (7). The pin (34) passes through the inner support block fixing seat (33) and has an open snap ring (35) at one end. The bottom of the inner support block (36) is provided with a tension spring fixing screw (38). The two ends of the reset tension spring (37) are respectively installed on the tension spring fixing screws (38) on the two inner support blocks (36). The hand-tightening screw (31) is threadedly connected to the cap-shaped fixing seat (32). The substrate is provided with multiple through holes (8), and multiple limiting blocks (3) are arranged in a ring array around the mounting inner hole of the circular structure. The inner support block (36) on the adjustment mechanism (4) is set in the through hole (8) and the adjustment mechanism (4) is detachably connected to the substrate. The two substrates are placed on the mounting base plate, and the adjustment mechanism (4) on the substrate is correspondingly placed into the positioning hole (11) on the mounting base plate (10) and the inner support block (36) on the adjustment mechanism (4) passes through the positioning hole (11). The hand screw (31) is rotated so that the end of the hand screw (31) contacts the two inner support blocks (36) until the two inner support blocks (36) are pushed to rotate outward and open, and the two inner support blocks (36) are symmetrically pressed against the inner side wall of the positioning hole. The central axis of the disc workpiece positioned on the multiple limiting blocks (3) is collinear with the central axis of the mounting hole of the mounting base plate.
2. The self-centering mounting fixture according to claim 1, characterized in that: The limiting block (3) is provided with a limiting surface with an arc structure, and the limiting surfaces on multiple limiting blocks (3) work together to position the disc workpiece.
3. The self-centering mounting fixture according to claim 1, characterized in that: The inner support block fixing seat (33) has mounting planes on both sides, and the end of the pin (34) and the open snap ring (35) are respectively attached to the mounting planes on both sides of the inner support block fixing seat (33).
4. The self-centering mounting fixture according to claim 1, characterized in that: A fixing piece (39) is provided between the cap-shaped fixing seat (32) and the inner support block fixing seat (33), and the fixing piece (39) is connected to the base plate.
5. A self-centering mounting fixture according to claim 4, characterized in that: The fixing plate (39) has symmetrically arranged arc-shaped mounting grooves on both sides. One end of the fixing screw (6) passes through the threaded hole on the substrate along the mounting groove and fixes the fixing plate (39) on the substrate.
6. A self-centering mounting fixture according to claim 5, characterized in that: The cap-shaped fixing seat (32), the inner support block fixing seat (33), and the fixing piece (39) are integrally formed structures.
7. A self-centering mounting fixture according to claim 1, characterized in that: Both ends of the two substrates are provided with positioning bosses (9), and the positioning bosses (9) on the first substrate (1) and the positioning bosses (9) on the second substrate (2) are connected by fastening screws.
8. A self-centering mounting fixture according to claim 1, characterized in that: A handle (5) is installed on the substrate, and the handles (5) on the two substrates are arranged in parallel.
9. A self-centering mounting fixture according to claim 1, characterized in that: Multiple through holes (8) are arranged in a ring array on the two combined substrates.
10. A self-centering mounting fixture according to claim 1, characterized in that: The plurality of positioning holes (11) are arranged in a ring array around the mounting hole (12) at the center of the mounting base plate (10).