Fool-proof fixture for positioning magnetic ring

Abstract

The application discloses a fool-proof fixture for magnetic ring positioning, which comprises a base, a bottom provided on the top of the base, a magnetic steel positioning seat provided on one side of the top of the bottom, and an installation plate provided on the magnetic steel positioning seat, wherein a second boss is provided on the top of the installation plate, and a step is provided on the bottom edge of the second boss; a mounting groove is formed in the middle of the front end of the installation plate, the mounting groove extends from the top end to the bottom end of the installation plate, and extends from the front end of the installation plate to the front edge of the bottom of the step; a lever is arranged at the mounting groove, an optical sensor is fixed to the front end of the magnetic steel positioning seat, an inwardly recessed sensing window is arranged on the inner side of the optical sensor, one end of the lever is opposite to the step, and the other end of the lever is opposite to the sensing window; the lever amplifies the height difference of the inner circumferential surface of the two poles of the magnetic ring, the recess on the one end of the lever is matched with the sensing window, and the correct surface is determined before marking, so that subsequent inspection is not needed.

Description

Technical Field

[0001] This invention relates to a magnetic ring positioning and error-proof fixture. Background Technology

[0002] like Figure 6 As shown, a magnetic ring A with specifications of φ34xφ24x10 has a C1-C1.2 chamfer A1 on the edge of the inner circular end face of the N pole, and no chamfer or a C0.25-C0.5 chamfer on the edge of the inner circular end face of the S pole. The outer circular surface has multiple square grooves A2, which are arranged in a cross shape. In order to clearly identify the magnetic poles, the end face with the C1 chamfer is laser-marked with the letter "N". At the same time, in order to maintain the consistency of the marking position, the "N" should have a specified positional relationship with the four square grooves on the outer circular surface.

[0003] In actual production, laser marking on the end face relies entirely on manual identification. Because the chamfer features of the two end faces are not significantly different, manual identification is prone to fatigue, leading to missed or incorrect judgments. This results in mismarked cases in every batch of shipped products, significantly impacting the installation of subsequent magnetic ring production lines. If full inspection is performed after laser marking, relying solely on manual subjective inspection not only fails to mitigate the risks but also increases labor costs. Utilizing specialized intelligent vision equipment is expensive, as a single set of dedicated equipment is costly. All of these factors contribute to substantial labor or equipment costs and only address the symptoms, not the root cause – inspection after marking is possible, but not placement during marking. Furthermore, because the marking position and angle are controlled manually without dedicated positioning fixtures, the marking position fluctuates significantly, affecting consistency and aesthetics. Summary of the Invention

[0004] This invention provides a magnetic ring positioning and error-proof fixture.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A magnetic ring positioning foolproof fixture includes a base, a pedestal on the top of the base, a magnetic positioning seat on one side of the top of the pedestal, and a mounting plate. A second protrusion is provided on the top of the mounting plate, and a step is provided at the bottom edge of the second protrusion. A mounting groove is provided in the middle of the front end of the mounting plate, extending from the top to the bottom of the mounting plate and from the front end of the mounting plate to the front edge of the bottom of the step. A lever is provided at the mounting groove. A photoelectric sensor is fixed to the front end of the magnetic positioning seat. A recessed sensing window is provided on the inner side of the photoelectric sensor. One end of the lever is opposite to the step, and the other end is opposite to the sensing window.

[0007] Preferably, the mounting plate has a first boss on its top, and the second boss is disposed on top of the first boss.

[0008] Preferably, both the first boss and the second boss are annular, and the first boss and the second boss are concentric and coaxial.

[0009] Preferably, the outer edge of the step is chamfered with C1.2.

[0010] Preferably, the outer edge of the first boss is provided with a plurality of vertically upward protruding positioning posts, which are arranged in a cross shape.

[0011] Preferably, one end of the lever is provided with an upwardly curved force application point, which cooperates with the mounting groove extending to the front edge of the step, and the top of the force application point is opposite to the chamfer of the top of the step; the other end of the lever is provided with an inwardly recessed groove in the middle.

[0012] Preferably, a fulcrum is provided on the lever near the point of force application, and a through hole is provided at the front end of the mounting plate, which is opposite to the fulcrum.

[0013] Preferably, a sensing beam is provided at the sensing window, and the groove of the lever is disposed inside the sensing window and opposite to the sensing beam, with the sensing beam passing through the groove.

[0014] Preferably, the front end of the magnet positioning seat is provided with a top cover, which protects the lever and photoelectric sensor inside the magnet positioning seat.

[0015] Preferably, a proximity switch is provided above the top cover of the magnet positioning seat.

[0016] Compared with existing technologies, the magnetic ring positioning anti-mistake fixture of the present invention amplifies the height difference between the inner surfaces of the two poles of the magnetic ring by using a lever. The force application point at one end of the lever is in contact with the magnetic ring, and the groove at the other end of the lever is opposite to the sensing window of the photoelectric sensor. The sensing beam of the sensing window passes through the groove. When the S pole of the magnetic ring is placed into the second boss with the magnetic ring facing down, the magnetic ring lightly presses the force application point, and the groove is still located in the recognition area of ​​the sensing beam. If the N pole of the magnetic ring is placed into the second boss with the magnetic ring facing down, the magnetic ring presses the force application point heavily, the groove is lifted upward, the groove leaves the recognition area of ​​the sensing beam, and the sensing beam in the sensing window is blocked by the lever, generating an audible and visual alarm signal to indicate that the magnetic ring is placed in reverse. This ensures that the correct face is determined before marking, eliminating the need for subsequent inspection. At the same time, the positioning post realizes the angular orientation of the magnetic ring, ensuring that the marking position of each "N" is the same, ensuring aesthetics. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the magnetic ring positioning and error-proof fixture of the present invention.

[0018] Figure 2 This is a first exploded view of the magnetic ring positioning and error-proof fixture of the present invention.

[0019] Figure 3 This is a second exploded view of the magnetic ring positioning and error-proof fixture of the present invention.

[0020] Figure 4 This is a partial schematic diagram of the magnetic ring positioning and error-proof fixture of the present invention.

[0021] Figure 5 This is a second partial schematic diagram of the magnetic ring positioning and error-proof fixture of the present invention.

[0022] Figure 6 This is a schematic diagram of the positioning magnetic ring of the magnetic ring positioning and error-proofing fixture of the present invention. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 5 As shown, the magnetic ring positioning anti-foolproof fixture includes a base 100, on the top of which a base 1 can be fixedly arranged. A magnetic positioning seat 2 is provided on one side of the top of the base 1. The magnetic positioning seat 2 includes a mounting plate 21. A first boss 22 is provided on the top of the mounting plate 21. A second boss 23 is provided on the top of the first boss 22. Both the first boss 22 and the second boss 23 are circular rings. The first boss 22 and the second boss 23 are concentric and coaxial. A step 231 is provided on the bottom edge of the second boss 23. The outer edge of the step 231 is machined with a C1.2 chamfer.

[0025] The mounting plate 21 has a mounting groove 211 in the middle of its front end. The mounting groove 211 extends from the top end of the mounting plate 21 to the bottom end and extends from the front end of the mounting plate 21 to the bottom front edge of the step 231. The outer edge of the first boss 22 is provided with a plurality of vertically upward protruding positioning posts 24. The plurality of positioning posts 24 are arranged in a cross shape and are opposite to the square groove A2 provided on the outer wall of the magnetic ring A. The function of the square groove A2 is to realize the angular orientation of the magnetic ring A. The straight distance from the inner wall of the positioning post 24 to the outer wall of the second boss 23 is greater than or equal to the straight distance from the inner side of the square groove A2 of the magnetic ring A to the inner wall of the magnetic ring A.

[0026] A lever 3 is provided at the mounting groove 211. One end of the lever 3 is provided with an upwardly curved force application point 31, which cooperates with the mounting groove 211 extending to the front edge of the step 231. The top of the force application point 31 is opposite to the C1.2 chamfer at the top of the step 231. A recessed groove 32 is provided in the middle of the other end of the lever 3. A fulcrum 33 is provided on the rod of the lever 3 near the force application point 31. A through hole 212 is provided at the front end of the mounting plate 21, which is opposite to the fulcrum 33 and extends through the left and right sides, thereby fixing the lever 3 in the mounting groove 211.

[0027] A photoelectric sensor 4 is fixed at the front end of the magnetic steel positioning base 2. The photoelectric sensor 4 has an inwardly recessed U-shaped sensing window 41 on its inner side. A sensing beam is set at the sensing window 41. The groove 32 of the lever 3 is set inside the sensing window 41 and is opposite to the sensing beam. The sensing beam is opposite to the groove 32, that is, the groove 32 is located in the recognition area of ​​the sensing beam.

[0028] The magnetic ring positioning principle is as follows: the chamfer of the S pole of magnetic ring A is shallower than that of the N pole. When the S pole of magnetic ring A is placed in the second protrusion 23, magnetic ring A lightly presses the force application point 31, and the groove 32 is still located in the recognition area of ​​the sensing beam. If the N pole of magnetic ring A is placed, magnetic ring A will drop 0.5-0.75mm relative to the former, and magnetic ring A will press the force application point 31 heavily. Through the double amplification of lever 3, the groove 32 is lifted upward, and the groove 32 leaves the recognition area of ​​the sensing beam. The sensing beam in the sensing window 41 is blocked by the rod of lever 3, generating an audible and visual alarm signal to indicate that magnetic ring A is placed in reverse.

[0029] The front end of the magnetic positioning base 2 is provided with a top cover 25, which protects the lever 3 and the photoelectric sensor 4 inside the magnetic positioning base 2 to prevent external factors from interfering with the positioning results.

[0030] A proximity switch 5 is provided above the top cover 25 of the magnetic positioning seat 2. The proximity switch 5 is used to monitor whether there is a magnetic ring on the second protrusion 23.

[0031] The proximity switch 5 and the photoelectric sensor 4 are connected to the PLC industrial control board of the control box via wires. The PLC industrial control board is also connected to a laser marking device. The control box is also equipped with a power switch and audible and visual alarm lights.

[0032] The function of proximity switch 5 is as follows: when there is no magnetic ring A on the second protrusion 23, proximity switch 5 does not perform signal processing; when magnetic ring A is placed on the second protrusion 23, the indicator light of proximity switch 5 lights up. After 0.5 seconds, proximity switch 5 will cooperate with photoelectric sensor 4 used for judging the workstation. That is, proximity switch 5 judges whether there is magnetic ring A on the second protrusion 23, and photoelectric sensor 4 judges whether magnetic ring A is correctly placed. If it is incorrectly placed, the sound and light indicator lights will emit a buzzer and flash to remind the operator that the material is placed in reverse, and at the same time, the laser marking cycle program will be cut off; if the magnetic ring is correctly placed, there will be no other action except that the indicator light of proximity switch 5 lights up, and the laser marking cycle program will proceed normally.

[0033] The magnetic ring positioning anti-mistake fixture of the present invention amplifies the height difference between the inner circular surfaces of the two poles of the magnetic ring A by lever 3. The force application point 31 at one end of lever 3 is in contact with the magnetic ring A, and the groove 32 at the other end of lever 3 is opposite to the sensing window 41 of the photoelectric sensor 4. The sensing beam of the sensing window 41 is directed through the groove 32. When the S pole of the magnetic ring A is placed into the second protrusion 23 with the magnetic ring A facing down, the magnetic ring A lightly presses the force application point 31, and the groove 32 remains in the recognition area of ​​the sensing beam. If the N pole of the magnetic ring A is placed into the second protrusion 23 with the magnetic ring A facing down, the magnetic ring A presses the force application point 31 heavily, the groove 32 is lifted upward, the groove 32 leaves the recognition area of ​​the sensing beam, and the sensing beam in the sensing window 41 is blocked by the rod of lever 3, generating an audible and visual alarm signal to indicate that the magnetic ring A is placed in reverse. This ensures that the correct face is determined before marking, eliminating the need for subsequent inspection. At the same time, the positioning post 24 realizes the angular orientation of the magnetic ring A, ensuring that the marking position of each "N" is the same, ensuring aesthetics.

[0034] Finally, it should be noted that the above embodiments are only illustrative of the technical solutions of the present invention, and not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic ring positioning and error-proof fixture, characterized in that, The system includes a base (100), a base (1) on the top of the base (100), a magnetic positioning seat (2) on one side of the top of the base (1), a mounting plate (21) on the top of the mounting plate (21), a second boss (23) on the top of the mounting plate (21), and a step (231) on the bottom edge of the second boss (23); a mounting groove (211) is provided in the middle of the front end of the mounting plate (21), the mounting groove (211) extends from the top end of the mounting plate (21) to the bottom end, and extends from the front end of the mounting plate (21) to the front edge of the bottom of the step (231); a lever (3) is provided at the mounting groove (211), and a photoelectric sensor (4) is fixed at the front end of the magnetic positioning seat (2). The sensor (4) has an inwardly recessed sensing window (41) on its inner side. One end of the lever (3) is opposite to the step (231), and the other end is opposite to the sensing window (41). One end of the lever (3) has an upwardly curved force application point (31). The force application point (31) cooperates with the mounting groove (211) extending to the front edge of the step (231). The top of the force application point (31) is opposite to the chamfer at the top of the step (231). The other end of the lever (3) has an inwardly recessed groove (32) in the middle. A sensing beam is provided at the sensing window (41). The groove (32) of the lever (3) is located inside the sensing window (41) and is opposite to the sensing beam. The sensing beam passes through the groove (32).

2. The magnetic ring positioning and error-proof fixture according to claim 1, characterized in that, The mounting plate (21) has a first boss (22) on its top, and the second boss (23) is located on top of the first boss (22).

3. The magnetic ring positioning and error-proof fixture according to claim 2, characterized in that, Both the first boss (22) and the second boss (23) are annular bodies, and the first boss (22) and the second boss (23) are concentric and coaxial.

4. The magnetic ring positioning and error-proof fixture according to claim 1, characterized in that, The outer edge of the step (231) is chamfered with C1.

2.

5. The magnetic ring positioning and error-proof fixture according to claim 2, characterized in that, The outer edge of the first boss (22) is provided with a plurality of positioning posts (24) that protrude vertically upward, and the plurality of positioning posts (24) are arranged in a cross shape.

6. The magnetic ring positioning and error-proof fixture according to claim 2, characterized in that, The lever (3) has a fulcrum (33) on the rod near the point of force application (31), and the mounting plate (21) has a through hole (212) at the front end that is opposite to the fulcrum (33).

7. The magnetic ring positioning and error-proof fixture according to claim 1, characterized in that, The front end of the magnetic positioning seat (2) is provided with a top cover (25), which protects the lever (3) and the photoelectric sensor (4) inside the magnetic positioning seat (2).

8. The magnetic ring positioning and error-proof fixture according to claim 1, characterized in that, A proximity switch (5) is provided above the top cover (25) of the magnetic positioning seat (2).

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