A magnetoelectric encoder

Abstract

This utility model relates to the field of encoder technology and discloses a magnetoelectric encoder, including a mechanical rotating assembly. The mechanical rotating assembly includes a retaining ring, a bushing, a bracket, and a shaft. The bushing is fixed to the center hole of the bracket by an interference fit. This magnetoelectric encoder, in this design, consists of a bracket, shaft, bushing, and retaining ring forming the basic mechanical rotating component. The front end of the shaft engages with a rotary seat, a spring is placed on the bushing, and a magnet is inserted into the inner hole of the rotary seat. Rotating the shaft causes the outer teeth of the rotary seat to contact the spring's pawl, generating a positioning CC (CC) sensation. Simultaneously, a switch pad is located above the magnet to fix the switch piece and PCBA. The rotary seat drives the magnet's rotation, causing its magnetic field to change and generating a signal that is output from the terminal to the end product. Compared to optoelectronic products, this design is structurally smaller, and the output signal can be adjusted via a computer using an IC chip, achieving the desired functions without changing the mechanical hardware. It also achieves IP waterproofing.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, specifically to a magnetoelectric encoder. Background Technology

[0002] An encoder is an electronic device that converts physical signals (such as position, speed, angle, etc.) into processable electrical or digital signals. It is widely used in industrial automation, robotics, CNC machine tools, aerospace and other fields. Encoders are the "sensing organs" of industrial automation and intelligent equipment. Their core value lies in achieving precise control, status monitoring and safety protection of mechanical systems through high-precision signal conversion and feedback. They are one of the basic components for the digitalization and intelligentization of modern industry.

[0003] However, in actual operation, the inventors found that the following problems still exist: the existing technology mainly uses photoelectric encoders, which detect rotational position through photoelectric conversion principle. However, most encoders on the market are photoelectric, and the structure of photoelectric encoders is larger and more complex, which cannot be used for integrated and smaller application needs and application scenarios.

[0004] Based on this, the present invention provides a magnetoelectric encoder. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a magnetoelectric encoder, which has the advantages of being smaller in structure than photoelectric products, and the output signal can be adjusted via a computer to achieve the desired functions without changing the mechanical hardware, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a magnetoelectric encoder, including a mechanical rotating assembly, the mechanical rotating assembly including a retaining ring, a bushing, a bracket, and a shaft, the bushing being fixed to the center hole of the bracket by an interference fit, the shaft passing through the inner hole of the bushing and being axially limited by the retaining ring, the front end of the shaft being connected to a rotary seat by a keyway, a spring being fixed in a groove on the outer periphery of the bushing, the spring being elastically contacting the outer teeth of the rotary seat, a magnet being fixed in the inner hole of the rotary seat by epoxy resin, a switch liner being provided above the magnet, the switch liner being fixed by a screw on the top boss of the bracket, a switch piece being snapped to the bottom surface of the switch liner, a PCBA being welded to the top surface of the switch liner, the PCBA integrating an IC chip, and the IC chip being led out through a through hole in the rear cover via a terminal.

[0007] Preferably, the rear cover and the bracket are connected by a circumferential buckle and an annular silicone ring for sealing, and the exposed end of the bushing is provided with a lip-shaped sealing ring that contacts the shaft.

[0008] Preferably, the inner hole of the rotary seat is provided with a stepped groove, the magnet is an annular neodymium iron boron permanent magnet, the outer diameter of the magnet is interference-fitted with the inner diameter of the groove of the rotary seat, and the axial direction is limited by the inner stepped surface of the rotary seat.

[0009] Preferably, the shaft and the inner hole of the bushing are fitted with an H7 / g6 clearance fit, and a ball bearing is embedded between them. The inner ring of the bearing is interference-fitted with the shaft, and the outer ring is interference-fitted with the bushing.

[0010] Preferably, the spring is a beryllium copper alloy annular piece, with an inner ring having a flange that is embedded in a bushing groove, and an outer ring claw that forms point contact with the involute tooth surface of the outer teeth of the rotary seat.

[0011] Preferably, an insulating washer is provided at the screw connection between the switch pad and the bracket, and the PCBA and the switch pad are fixed by surface mount technology.

[0012] Preferably, the terminal is a gold-plated copper pin, and the through hole penetrating the rear cover is sealed with epoxy resin. The protruding end of the pin is provided with a bending-resistant reinforcing rib.

[0013] Preferably, the lip seal of the bushing is made of fluororubber, and a helical spring is provided in the inner diameter of the seal to enhance the clamping force of the lip, achieving IP54 dustproof and waterproof rating.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This magneto-electric encoder consists of a bracket, shaft, bushing, and retaining ring as its basic mechanical rotating components. The front end of the shaft engages with a rotary base, a spring is placed on the bushing, and a magnet is inserted into the inner hole of the rotary base. When the shaft rotates, the outer teeth of the rotary base contact the spring's pawl, generating a positioning CC sensation. Simultaneously, a switch pad is located above the magnet to fix the switch piece and PCBA. The rotary base drives the magnet's rotation, causing its magnetic field to change and generate a signal that is output from the terminal to the end product. Compared to photoelectric products, this solution has a smaller structure, and the output signal can be adjusted via a computer using an IC chip to achieve the desired functions without changing the mechanical hardware. It also achieves IP waterproofing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the structure viewed from below.

[0018] In the diagram: 1. Back cover; 2. IC chip; 3. Terminal; 4. PCBA; 5. Switch plate; 6. Switch liner; 7. Magnet; 8. Rotary base; 9. Spring; 10. Snap ring; 11. Bushing; 12. Bracket; 13. Shaft. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-2 A magnetoelectric encoder includes a mechanical rotating assembly comprising a retaining ring 10, a bushing 11, a bracket 12, and a shaft 13. The bushing 11 is fixed to the center hole of the bracket 12 by an interference fit. The shaft 13 passes through the inner hole of the bushing 11 and is axially limited by the retaining ring 10. The front end of the shaft 13 is connected to a rotary seat 8 by a keyway. A spring 9 is fixed to the outer circumference of the bushing 11 by a retaining groove. The spring 9 has a claw that elastically contacts the outer teeth of the rotary seat 8. A magnet 7 is fixed to the inner hole of the rotary seat 8 by epoxy resin. A switch pad 6 is disposed above the magnet 7 and is fixed by a screw on the top boss of the bracket 12. A switch piece 5 is snapped to the bottom surface of the switch pad 6. A PCBA 4 is welded to the top surface of the switch pad 6. The PCBA 4 integrates an IC chip 2. 2. The output is led out through the through hole of the rear cover 1 via the terminal 3. This solution consists of a bracket 12, a shaft 13, a bushing 11, and a retaining ring 10, forming a basic mechanical rotating component. The front end of the shaft 13 cooperates with the rotary seat 8, and the spring 9 is placed on the bushing 11. The magnet 7 is placed in the inner hole of the rotary seat 8. When the shaft 13 is rotated, the outer teeth of the rotary seat 8 contact the contact claw of the spring 9, generating a positioning CC sensation. At the same time, there is a switch pad 6 above the magnet 7, which is used to fix the switch piece 5 and PCBA4. The rotary seat 8 drives the rotation of the magnet 7, causing its magnetic field to change and generate a signal that is output to the end product through the terminal. Compared with optoelectronic products, this solution is smaller in structure. The output signal can be adjusted by the IC chip on the computer to achieve the customer's desired function without changing the mechanical hardware. It can also achieve IP54 waterproof function.

[0021] The rear cover 1 and the bracket 12 are connected by a circumferential buckle and an annular silicone ring for sealing, and the exposed end of the bushing 11 is provided with a lip-shaped sealing ring that contacts the shaft 13.

[0022] The rotary seat 8 has a stepped groove in its inner hole, and the magnet 7 is a ring-shaped neodymium iron boron permanent magnet. The outer diameter of the magnet 7 is interference-fitted with the inner diameter of the groove in the rotary seat 8, and its axial direction is limited by the stepped surface inside the rotary seat 8.

[0023] The shaft 13 and the inner hole of the bushing 11 are fitted with an H7 / g6 clearance fit, and a ball bearing is embedded between them. The inner ring of the bearing is interference-fitted with the shaft 13, and the outer ring is interference-fitted with the bushing 11.

[0024] Among them, the spring 9 is a beryllium copper alloy annular piece, with a flange on the inner ring that is embedded in the groove of the bushing 11, and the outer ring forming point contact with the involute tooth surface of the outer tooth of the rotary seat 8.

[0025] An insulating washer is provided at the screw connection between the switch pad 6 and the bracket 12, and the PCBA4 and the switch pad 6 are fixed by surface mount technology.

[0026] Among them, terminal 3 is a gold-plated copper lead, which is sealed with epoxy resin when it passes through the through hole of the back cover 1, and the protruding end of the lead is provided with anti-bending reinforcing ribs.

[0027] Among them, the lip seal of bushing 11 is made of fluororubber, and a spiral spring is set in the inner diameter of the seal to enhance the clamping force of the lip, achieving IP54 dustproof and waterproof rating.

[0028] The working principle consists of a bracket 12, a shaft 13, a bushing 11, and a retaining ring 10, forming a basic mechanical rotating component. The front end of the shaft 13 engages with the rotary seat 8, and the spring 9 is placed on the bushing 11. A magnet 7 is inserted into the inner hole of the rotary seat 8. When the shaft 13 is rotated, the outer teeth of the rotary seat 8 contact the pawl of the spring 9, generating a positioning CC sensation. At the same time, there is a switch pad 6 above the magnet 7, which is used to fix the switch piece 5 and PCBA 4. The rotary seat 8 drives the rotation of the magnet 7, causing its magnetic field to change and generate a signal that is output from the terminal to the end product, achieving an IP54 waterproof function.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magneto-electric encoder, characterized by The assembly includes a mechanical rotating component, comprising a retaining ring (10), a bushing (11), a bracket (12), and a shaft (13). The bushing (11) is fixed to the center hole of the bracket (12) by an interference fit. The shaft (13) passes through the inner hole of the bushing (11) and is axially limited by the retaining ring (10). The front end of the shaft (13) is connected to the rotary seat (8) by a keyway. A spring plate (9) is fixed in a groove on the outer periphery of the bushing (11). The claw of the spring plate (9) interacts with the external teeth of the rotary seat (8). Sexual contact, the inner hole of the rotary seat (8) is fixed with a magnet (7) by epoxy resin glue, a switch pad (6) is provided above the magnet (7), the switch pad (6) is fixed by the top boss screw of the bracket (12), the bottom surface of the switch pad (6) is snapped with a switch piece (5), the top surface of the switch pad (6) is welded and fixed with a PCBA (4), the PCBA (4) integrates an IC chip (2), the IC chip (2) is led out through the through hole of the back cover (1) through the terminal (3).

2. The magnetoelectric encoder according to claim 1, characterized in that: The rear cover (1) and the bracket (12) are connected by a circumferential buckle and an annular silicone ring. The exposed end of the bushing (11) is provided with a lip seal ring that contacts the shaft (13).

3. A magnetoelectric encoder according to claim 1, characterized in that: The inner hole of the rotary seat (8) is provided with a stepped groove, and the magnet (7) is an annular neodymium iron boron permanent magnet. The outer diameter of the magnet (7) is interference-fitted with the inner diameter of the groove of the rotary seat (8), and the axial direction is limited by the inner stepped surface of the rotary seat (8).

4. A magnetoelectric encoder according to claim 1, characterized in that: The inner hole of the shaft (13) and the bushing (11) are fitted with an H7 / g6 clearance fit, and a ball bearing is embedded between them. The inner ring of the bearing is interference-fitted with the shaft (13), and the outer ring is interference-fitted with the bushing (11).

5. A magnetoelectric encoder according to claim 1, characterized in that: The spring (9) is a beryllium copper alloy annular piece, with a flange on the inner ring that is embedded in the groove of the bushing (11), and the outer ring forming point contact with the involute tooth surface of the outer tooth of the rotary seat (8).

6. A magnetoelectric encoder according to claim 1, characterized in that: An insulating washer is provided at the screw connection between the switch pad (6) and the bracket (12), and the PCBA (4) and the switch pad (6) are fixed by surface mount technology.

7. A magnetoelectric encoder according to claim 1, characterized in that: The terminal (3) is a gold-plated copper pin. When it passes through the through hole of the back cover (1), it is sealed with epoxy resin. The protruding end of the pin is provided with anti-bending reinforcing ribs.

8. A magnetoelectric encoder according to claim 1, characterized in that: The lip seal of the bushing (11) is made of fluororubber, and a spiral spring is provided in the inner diameter of the seal to enhance the clamping force of the lip, so as to achieve IP54 dustproof and waterproof rating.

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