Magnetoelectric encoder and electric machine having the same

Abstract

The utility model provides a kind of magneto electric encoder and motor with it, comprising: magnetic ring code disc, with the main part of motor fixed connection;Circuit board and magnetic sensing unit, the magnetic sensing unit is set on the circuit board and is electrically connected with the circuit board, the magnetic sensing unit is oppositely arranged with the magnetic ring code disc;Radiator support, fixed mounting on the output shaft of motor, the output shaft of motor is rotatably arranged relative to the main part of motor, to rotate the radiator support by the output shaft of motor;The circuit board is fixedly installed on the radiator support and is spaced apart with the output shaft of motor.The technical scheme provided by the utility model can solve the technical problem that the anti-interference ability of magneto electric encoder in the prior art is weak in strong magnetic environment, which is not conducive to high-power work.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, and more specifically, to a magneto-electric encoder and a motor having the same. Background Technology

[0002] Currently, magnetoelectric encoders, as a key component for servo motor angle measurement, are widely used in automation control across various fields. These encoders typically combine a magnetic ring code disk with a stationary magnetic induction chip. The magnetic induction chip senses changes in the magnetic signal generated when the magnetic ring code disk rotates, converting this into an electrical signal to output angular displacement or speed information. Due to their strong anti-interference capabilities and relatively low cost, magnetoelectric encoders have secured a place in industrial applications, especially in situations where high precision requirements are not critical.

[0003] However, the magnetic ring of a magneto-electric encoder is affected by a strong magnetic field when rotating, preventing it from rotating smoothly and thus making it unable to maintain stable accuracy under strong magnetic field interference. Consequently, magneto-electric encoders cannot maintain stable operating accuracy under strong magnetic fields, have weak anti-interference capabilities in strong magnetic environments, and are not suitable for high-power operation. Utility Model Content

[0004] The main objective of this invention is to provide a magneto-electric encoder and a motor having the same, in order to solve the technical problem that existing magneto-electric encoders have weak anti-interference capabilities in strong magnetic environments, which is not conducive to their high-power operation.

[0005] To achieve the above objectives, according to one aspect of the present invention, a magnetoelectric encoder is provided, comprising:

[0006] The magnetic ring encoder is fixedly connected to the main body of the motor;

[0007] A circuit board and a magnetic sensing unit, wherein the magnetic sensing unit is disposed on the circuit board and electrically connected to the circuit board, and the magnetic sensing unit is disposed opposite to the magnetic ring encoder;

[0008] A heat dissipation bracket is fixedly mounted on the output shaft of a motor, the output shaft of which is rotatably mounted relative to the main body of the motor, so as to drive the heat dissipation bracket to rotate via the output shaft of the motor; the circuit board is fixedly mounted on the heat dissipation bracket and spaced apart from the output shaft of the motor.

[0009] Furthermore, the heat dissipation bracket is provided with mounting holes adapted to the output shaft of the motor, and the heat dissipation bracket is sleeved on the output shaft of the motor through the mounting holes; and / or,

[0010] The circuit board is mounted on the end of the heat sink bracket away from the output shaft of the motor.

[0011] Furthermore, the heat dissipation bracket includes:

[0012] A heat dissipation body is sleeved on the output shaft of the motor;

[0013] A first heat dissipation rib is disposed at the end of the heat dissipation body away from the output shaft of the motor. The first heat dissipation rib extends radially along the heat dissipation body, and the circuit board is disposed on the first heat dissipation rib.

[0014] Furthermore, the heat dissipation bracket also includes:

[0015] The second heat dissipation rib is disposed on the heat dissipation body and extends radially along the heat dissipation body. The second heat dissipation rib and the first heat dissipation rib are spaced apart along the axial direction of the heat dissipation body to form a heat dissipation gap.

[0016] Furthermore, there are at least two second heat dissipation ribs, which are spaced apart along the axial direction of the heat dissipation body to form a heat dissipation gap; and / or,

[0017] The heat sink is made of copper alloy; and / or,

[0018] The heat dissipation body is provided with a mounting hole that matches the output shaft of the motor. The heat dissipation body is sleeved on the output shaft of the motor through the mounting hole. The mounting hole is provided to pass through both ends of the heat dissipation body along the axial direction of the heat dissipation body. The magneto-electric encoder also includes a locking member, which passes through the mounting hole and is locked to the output shaft of the motor.

[0019] Furthermore, the first heat dissipation fin has a mounting surface extending radially along the main body, and the circuit board is attached to the mounting surface.

[0020] Furthermore, the magneto-electric encoder also includes:

[0021] A heat-conducting component is disposed between the first heat dissipation fin and the circuit board, and the heat-conducting component is made of a heat-conducting material.

[0022] Furthermore, the end face of the heat dissipation body away from the output shaft of the motor and the mounting surface of the first heat dissipation rib are spaced apart along the axial direction of the heat dissipation body, the circuit board is mounted on the end face of the heat dissipation body away from the output shaft of the motor, and the heat-conducting element is filled on the mounting surface and the side of the circuit board away from the magnetic induction unit.

[0023] Furthermore, the thermally conductive element is made of thermally conductive gel.

[0024] Furthermore, the magneto-electric encoder also includes:

[0025] An end cover, at least a portion of which is fixedly connected to the main body of the motor and forms a protective cavity with the main body of the motor, wherein at least a portion of the output shaft of the motor, the circuit board and the magnetic induction unit are all installed inside the protective cavity; and the magnetic ring encoder is fixed on the end cover.

[0026] Furthermore, the end cap includes a cover body portion and a connecting portion connected to each other. The cover body portion forms at least a portion of the end cap. The connecting portion is disposed within the protective cavity, protruding from the inner wall of the cover body portion and extending in a direction close to the heat dissipation bracket. The magnetic ring encoder is disposed at the end of the connecting portion away from the cover body portion; and / or,

[0027] The magnetic ring encoder is bonded to the end cap.

[0028] Furthermore, the magneto-electric encoder also includes:

[0029] The brush post is fixedly connected to the circuit board and electrically connected to the circuit board so as to drive the brush post to rotate through the circuit board;

[0030] The power supply ring is fixedly connected to the main body of the motor, and the power supply ring is in contact with the end of the brush post.

[0031] Furthermore, the magneto-electric encoder also includes an end cover, at least a portion of which is fixedly connected to the main body of the motor and forms a protective cavity with the main body of the motor. At least a portion of the motor's output shaft, the circuit board, and the magnetic sensing unit are all installed within the protective cavity. The end cover is provided with a wiring hole communicating with the protective cavity. The magneto-electric encoder also includes a power connection wire, which is connected to a power supply device and passes through the wiring hole; and / or,

[0032] The brush post includes a graphite segment, a conductive slider, an elastic element, and a conductive connecting segment connected in sequence. The graphite segment is in contact with the power supply ring, and the conductive connecting segment is connected to the circuit board.

[0033] According to another aspect of the present invention, a motor is provided, including the magneto-electric encoder provided above.

[0034] By applying the technical solution of this invention, the magnetoelectric encoder not only improves its working stability in harsh environments, but also effectively reduces the operating temperature of the circuit board through optimized heat dissipation brackets and heat-conducting components, thereby enhancing the accuracy and reliability of the magnetic induction chip. The combination of brush posts and power supply rings enables high-power supply, allowing the use of higher-performance chips and further improving the encoder's accuracy and response speed. Furthermore, by fixing the magnetic ring code disk to the end cover, rather than the traditional motor output shaft, interference from strong magnetic fields on the encoder is reduced, ensuring high-precision measurement even in complex electromagnetic environments. These improvements enable the encoder to operate stably in environments with high vibration, shock, and oil contamination, making it suitable for high-end applications such as robotic arms. This significantly expands the application range and working conditions of magnetoelectric encoders, providing a more accurate and reliable angular displacement detection solution for industrial automation. Attached Figure Description

[0035] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0036] Figure 1 A cross-sectional view of a magnetoelectric encoder provided according to an embodiment of the present invention is shown;

[0037] Figure 2 A schematic diagram of the structure of a magnetic ring encoder provided according to an embodiment of the present invention is shown;

[0038] Figure 3 A schematic diagram of the circuit board provided according to an embodiment of the present invention is shown from one perspective;

[0039] Figure 4 A schematic diagram of the circuit board provided according to an embodiment of the present invention is shown from another perspective;

[0040] Figure 5 A schematic diagram of the structure of a heat dissipation bracket provided according to an embodiment of the present invention is shown;

[0041] Figure 6 A schematic diagram of the structure of a brush post provided according to an embodiment of the present invention is shown from one perspective;

[0042] Figure 7 A schematic diagram of the brush post provided according to an embodiment of the present invention is shown from another perspective.

[0043] The above figures include the following reference numerals:

[0044] 10. Magnetic ring encoder;

[0045] 21. Main body;

[0046] 22. Output shaft;

[0047] 30. Circuit board;

[0048] 40. Magnetic induction unit;

[0049] 50. Heat dissipation bracket;

[0050] 51. Heat dissipation unit;

[0051] 52. First heat dissipation fin;

[0052] 521. Mounting surface;

[0053] 53. Second heat dissipation fin;

[0054] 60. Locking components;

[0055] 70. Thermal conductive components;

[0056] 80. End cap;

[0057] 81. Protective cavity;

[0058] 82. Cover part;

[0059] 83. Connecting part;

[0060] 84. Wiring holes;

[0061] 90. Brush column;

[0062] 91. Graphite segment;

[0063] 92. Conductive slider;

[0064] 93. Elastic components;

[0065] 94. Conductive connection section;

[0066] 100. Power supply ring;

[0067] 110. Power connection cable;

[0068] 120. Connecting parts. Detailed Implementation

[0069] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0070] like Figures 1 to 7As shown, an embodiment of this utility model provides a magnetoelectric encoder, which includes: a magnetic ring code disk 10, a circuit board 30, a magnetic sensing unit 40, and a heat dissipation bracket 50. The magnetic ring code disk 10 is fixedly connected to the main body 21 of a motor. The magnetic sensing unit 40 is disposed on the circuit board 30 and electrically connected to the circuit board 30, and the magnetic sensing unit 40 is disposed opposite to the magnetic ring code disk 10. The output shaft 22 of the motor is fixedly mounted on the output shaft 22 of the motor, and the output shaft 22 of the motor is rotatably disposed relative to the main body 21 of the motor so as to drive the heat dissipation bracket 50 to rotate. The circuit board 30 is fixedly mounted on the heat dissipation bracket 50 and spaced apart from the output shaft 22 of the motor.

[0071] This embodiment effectively solves the problem of accuracy degradation in traditional encoders under strong magnetic environments by fixing the magnetic ring code disk 10 to the motor body 21, while the heat dissipation bracket 50 and circuit board 30 rotate with the motor's output shaft 22. In principle, the magnetic sensing unit 40 determines position information by detecting changes in the magnetic field of the magnetic ring code disk 10, and the rotation of the heat dissipation bracket 50 helps enhance heat dissipation, reducing accuracy loss due to temperature increases. In terms of effectiveness, the technical solution in this embodiment enables the encoder to operate stably at high power, improving its adaptability and reliability in harsh environments. In other embodiments, by improving the material and design of the magnetic sensing unit 40, its anti-magnetic interference capability can be further enhanced, solving the technical problem that existing magnetoelectric encoders have weak anti-interference capabilities under strong magnetic environments, which is detrimental to their high-power operation.

[0072] Specifically, the magnetic sensing unit 40 can be a magnetic sensing chip. The circuit board 30 can be a PCB board.

[0073] In this embodiment, the heat dissipation bracket 50 is provided with a mounting hole that matches the output shaft 22 of the motor, and the heat dissipation bracket 50 is sleeved on the output shaft 22 of the motor through the mounting hole; and / or, the circuit board 30 is mounted on the end of the heat dissipation bracket 50 away from the output shaft 22 of the motor.

[0074] Specifically, the mounting holes ensure a precise fit between the heat sink bracket 50 and the motor's output shaft 22, facilitating installation and improving stability. The placement of the circuit board 30 helps prevent direct heat transfer from the motor shaft, protecting it from high temperatures. Furthermore, the optimized heat dissipation path, achieved through the mounting holes and the specific layout of the circuit board 30, allows heat to be more effectively conducted from the circuit board 30 to the heat sink bracket 50 and then dissipated into the external environment. In terms of effectiveness, the technical solution in this embodiment significantly reduces the temperature of the circuit board 30, improving the overall performance and lifespan of the encoder. In other embodiments, the heat dissipation efficiency can be further improved by changing the material of the heat sink bracket 50 or adding auxiliary heat dissipation devices such as cooling fans, making it suitable for higher power applications.

[0075] Specifically, the heat dissipation bracket 50 includes: a heat dissipation body 51 and a first heat dissipation rib 52. The heat dissipation body 51 is sleeved on the output shaft 22 of the motor. The first heat dissipation rib 52 is disposed at one end of the heat dissipation body 51 away from the output shaft 22 of the motor. The first heat dissipation rib 52 extends radially along the heat dissipation body 51. The circuit board 30 is disposed on the first heat dissipation rib 52.

[0076] This structural design, combining the heat dissipation body 51 and the first heat dissipation rib 52, increases the heat dissipation area and improves heat dissipation efficiency. In principle, the radial extension of the first heat dissipation rib 52 helps guide heat diffusion radially, accelerating heat dissipation. In terms of effect, the technical solution in this embodiment effectively reduces the temperature of the circuit board 30, improves the working environment of the magnetic induction chip, and thus improves the accuracy and stability of the encoder. In other embodiments, the heat dissipation effect can be further optimized by increasing the number of heat dissipation ribs or changing their shape to meet the heat dissipation requirements of different environments.

[0077] In this embodiment, the heat dissipation bracket 50 further includes a second heat dissipation rib 53. The second heat dissipation rib 53 is disposed on the heat dissipation body 51 and extends radially along the heat dissipation body 51. The second heat dissipation rib 53 and the first heat dissipation rib 52 are spaced apart along the axial direction of the heat dissipation body 51 to form a heat dissipation gap. The addition of the second heat dissipation rib 53 forms a multi-level heat dissipation structure, enhancing the heat dissipation capacity of the heat dissipation bracket 50. In principle, the existence of the heat dissipation gap promotes airflow and accelerates the convective heat dissipation. In terms of effect, the technical solution in this embodiment improves the overall heat dissipation efficiency, enabling the encoder to maintain good temperature control even when operating at high power. In other embodiments, the heat dissipation performance can be further improved by adjusting the size of the heat dissipation gap or increasing the heat dissipation channels, making it suitable for a wider range of high-power application scenarios.

[0078] Specifically, there are at least two second heat dissipation ribs 53, which are spaced apart along the axial direction of the heat dissipation body 51 to form a heat dissipation gap; and / or, the heat dissipation bracket 50 is made of copper alloy material; and / or, the heat dissipation body 51 is provided with a mounting hole adapted to the output shaft 22 of the motor, the heat dissipation body 51 is sleeved on the output shaft 22 of the motor through the mounting hole, the mounting hole is provided to pass through both ends of the heat dissipation body 51 along the axial direction, and the magneto-electric encoder also includes a locking member 60, which passes through the mounting hole and is locked to the output shaft 22 of the motor.

[0079] Technically, the inclusion of at least two second heat dissipation fins 53 effectively improves the heat dissipation effect of the heat dissipation bracket 50. The choice of copper alloy material, due to its high thermal conductivity, allows for rapid heat transfer from the circuit board 30 to the outside. The use of the locking element 60 ensures a stable connection between the heat dissipation bracket 50 and the motor's output shaft 22. In principle, the high thermal conductivity of the copper alloy material helps improve heat dissipation efficiency, and the locking effect of the locking element 60 prevents the encoder from loosening during high-speed rotation. In terms of effectiveness, the technical solution in this embodiment not only enhances heat dissipation performance but also improves the mechanical stability of the encoder, ensuring accuracy and reliability under high-power operation. In other embodiments, the heat dissipation effect and mechanical stability can be further improved by using other high thermal conductivity materials or by improving the design of the locking element 60, meeting the needs of use in special environments.

[0080] In this embodiment, the first heat dissipation rib 52 has a mounting surface 521 extending radially along the main body 21, and the circuit board 30 is attached to the mounting surface 521. Specifically, the design of the mounting surface 521 ensures good contact between the circuit board 30 and the heat dissipation bracket 50, which is beneficial to efficient heat conduction. In principle, the close contact between the circuit board 30 and the mounting surface 521 reduces thermal resistance and improves heat dissipation efficiency. In terms of effect, the technical solution in this embodiment effectively reduces the temperature of the circuit board 30, extends the service life of the encoder, and improves its working stability in harsh environments. In other embodiments, the thermal resistance can be further reduced and the heat dissipation performance improved by improving the surface treatment of the mounting surface 521, such as adding microgrooves or coatings.

[0081] Specifically, the magneto-electric encoder further includes a heat-conducting element 70, which is disposed between the first heat dissipation rib 52 and the circuit board 30, and the heat-conducting element 70 is made of a heat-conducting material.

[0082] With this structural design, the addition of the heat-conducting component 70 further optimizes the heat conduction path and improves heat dissipation efficiency. In principle, the high thermal conductivity of the heat-conducting material helps accelerate the transfer of heat from the circuit board 30 to the heat sink 50. In terms of effectiveness, the technical solution in this embodiment significantly reduces the temperature of the circuit board 30, improves the working accuracy of the magnetic induction chip, and enhances the stability and reliability of the encoder.

[0083] Specifically, the end face of the heat dissipation body 51 away from the output shaft 22 of the motor and the mounting surface 521 of the first heat dissipation rib 52 are spaced apart along the axial direction of the heat dissipation body 51. The circuit board 30 is mounted on the end face of the heat dissipation body 51 away from the output shaft 22 of the motor. The heat-conducting element 70 fills the mounting surface 521 and the side of the circuit board 30 away from the magnetic induction unit 40.

[0084] This structural arrangement, with the spacing between the circuit board 30 and the end face of the heat sink 51, along with the filling of the heat-conducting component 70, forms an effective heat conduction path. In principle, by controlling the distance between the circuit board 30 and the heat sink 51, the heat dissipation effect can be optimized, while the filling of the heat-conducting component 70 further reduces thermal resistance and improves heat conduction efficiency. In terms of effectiveness, the technical solution in this embodiment effectively controls the temperature of the circuit board 30, improving the accuracy and stability of the encoder, especially during high-power operation. In other embodiments, the heat dissipation effect can be further optimized by adjusting the distance between the circuit board 30 and the end face of the heat sink 51 or by improving the filling method of the heat-conducting component 70, to adapt to motor applications of different power levels.

[0085] In this embodiment, the thermally conductive element 70 is made of thermally conductive gel. The thermally conductive gel is chosen because of its excellent filling and thermal conductivity, which effectively reduces thermal resistance and improves heat dissipation efficiency. In principle, the thermally conductive gel has good fluidity, allowing it to fully fill the irregular surface between the circuit board 30 and the first heat dissipation rib 52. After curing, it retains a certain degree of elasticity, adapting to minor deformations of the circuit board 30 and ensuring long-term stable heat conduction. In terms of effect, the technical solution in this embodiment significantly improves heat conduction efficiency, reduces the temperature of the circuit board 30, and enhances the stability and accuracy of the encoder. In other embodiments, other types of thermally conductive materials, such as metal-based composite materials or high-performance thermally conductive silicone grease, can be used to further improve thermal conductivity, making it suitable for applications with higher power or more extreme environments.

[0086] In other embodiments, thermal conductivity can be further improved by selecting different types of thermally conductive materials, such as metal-based composite materials or high-performance thermal grease, making it suitable for higher power applications.

[0087] In this embodiment, the magneto-electric encoder further includes: an end cover 80, at least a portion of which is fixedly connected to the main body 21 of the motor and forms a protective cavity 81 with the main body 21 of the motor. At least a portion of the output shaft 22 of the motor, the circuit board 30, and the magnetic sensing unit 40 are all installed within the protective cavity 81; the magnetic ring code disk 10 is fixed to the end cover 80. The design of the protective cavity 81 provides additional protection, preventing the external environment from affecting the internal components of the encoder. In principle, the fixed connection between the end cover 80 and the main body 21 of the motor forms a closed protective space, isolating dust, oil, and other contaminants in harsh environments. Combined with the way the magnetic ring code disk 10 is set on the end cover 80, the stability of the magnetic ring code disk 10's setting and operation can be effectively improved. In terms of effectiveness, the technical solution in this embodiment improves the environmental adaptability and reliability of the encoder, especially for applications in highly polluted environments, protecting internal components from damage. In other embodiments, the protective effect can be further enhanced by improving the sealing design of the end cap 80 or using more corrosion-resistant materials, making it suitable for harsher industrial environments.

[0088] Specifically, the end cap 80 includes a cover portion 82 and a connecting portion 83 connected to each other. The cover portion 82 forms at least a part of the end cap 80, and the connecting portion 83 is disposed within the protective cavity 81. The connecting portion 83 protrudes from the inner wall of the cover portion 82 and extends in a direction close to the heat dissipation bracket 50. The magnetic ring code disk 10 is disposed at the end of the connecting portion 83 away from the cover portion 82; and / or, the magnetic ring code disk 10 is bonded to the end cap 80. With this structural arrangement, the design of the connecting portion 83 facilitates the bonding and fixing of the magnetic ring code disk 10, thereby reducing the distance between the magnetic ring code disk 10 and the magnetic sensing unit 40, ensuring the stability of the relative arrangement of the magnetic ring code disk 10 and the magnetic sensing unit 40, simplifying the assembly process, and improving assembly efficiency. In principle, the magnetic ring code disk 10, by being bonded and fixed to the connecting portion 83, ensures that its relative position with the motor body 21 remains unchanged, thus guaranteeing the measurement accuracy of the encoder. In terms of effectiveness, the technical solution in this embodiment simplifies the encoder assembly process, reduces production costs, and improves the encoder's accuracy and stability. In other embodiments, the fixing strength and accuracy of the magnetic ring code disk 10 can be further improved by improving the performance of the adhesive material or optimizing the structure of the connection part 83, making it suitable for high-precision measurement needs.

[0089] In this embodiment, the magneto-electric encoder further includes: a brush post 90 and a power supply ring 100. The brush post 90 is fixedly connected to the circuit board 30 and electrically connected to the circuit board 30 so as to drive the brush post 90 to rotate through the circuit board 30. The power supply ring 100 is fixedly connected to the main body 21 of the motor and contacts the end of the brush post 90.

[0090] By employing the above configuration, the stable power supply to the magneto-electric encoder during rotation is achieved through the coordinated use of the brush posts 90 and the power supply ring 100. In principle, the brush posts 90, through contact with the power supply ring 100, can continuously supply power even when the motor shaft rotates at high speed, overcoming the limitations of traditional cable power supply methods. In terms of effectiveness, the technical solution in this embodiment improves the reliability and stability of the encoder's power supply, especially during high-power operation, where the brush posts 90 can provide a larger current, meeting the requirements of high-precision magnetic induction chips. In other embodiments, the stability and efficiency of the power supply can be further improved by modifying the material or design of the brush posts 90, such as adding a wear-resistant layer or optimizing the contact pressure, making it suitable for higher power or more complex application scenarios.

[0091] Specifically, the magneto-electric encoder further includes an end cover 80, at least a portion of which is fixedly connected to the main body 21 of the motor and forms a protective cavity 81 with the main body 21 of the motor. At least a portion of the output shaft 22 of the motor, the circuit board 30, and the magnetic sensing unit 40 are all installed in the protective cavity 81. The end cover 80 is provided with a wiring hole 84 communicating with the protective cavity 81. The magneto-electric encoder further includes a power connection line 110, which is connected to a power supply device and passes through the wiring hole 84. And / or, the brush post 90 includes a graphite segment 91, a conductive slider 92, an elastic element 93, and a conductive connecting segment 94 connected in sequence. The graphite segment 91 contacts the power supply ring 100, and the conductive connecting segment 94 is connected to the circuit board 30.

[0092] With the above-described structure, technically, the wiring design of the power connection line 110 facilitates the stability of power supply to the power supply ring 100. The structural composition of the brush column 90 ensures the connection stability between the brush column 90 and the power supply ring 100, guaranteeing that the brush column 90 remains connected to the power supply ring 100 at all times, thereby ensuring stable power supply and signal transmission for the magneto-electric encoder in harsh environments. In principle, the contact between the graphite segment 91 and the power supply ring 100 provides stable brush power supply, while the elastic element 93 ensures good contact between the brush column 90 and the power supply ring 100, maintaining continuous power supply even under vibration or shock conditions. In terms of effectiveness, the technical solution in this embodiment improves the power supply reliability and signal transmission stability of the encoder, enhancing its adaptability and performance in harsh environments. In other embodiments, the stability of power supply and signal transmission can be further improved by improving the protective measures of the power connection line 110 or adjusting the length and material of each segment of the brush column 90, making it suitable for a wider range of application scenarios.

[0093] Specifically, the conductive slider 92, the elastic element 93, and the conductive connecting section 94 can all be made of conductive materials. The graphite section 91 is made of graphite material.

[0094] In this embodiment, the magnetic ring is fixed on the encoder cover, while the PCB board and heat sink bracket 50 are locked together on the output shaft 22 of the motor. The output shaft 22 of the motor drives the PCB board and heat sink bracket 50 to rotate as a whole. The power supply method has been changed from direct power supply by cable to power supply by brush column 90. The brush column 90 can still provide stable and reliable power supply when rotating.

[0095] Because of the introduction of brush posts 90 for power supply, which can provide higher power than cables, the PCB board can use chips with higher precision and higher power consumption. At the same time, because a high-power magnetic induction chip is used, the magnetic induction chip generates more heat than a low-power chip. Therefore, a heat dissipation device is also introduced for the PCB board to reduce the temperature of the PCB and make it work in a more ideal temperature range.

[0096] like Figure 1As shown, the magneto-electric encoder includes a PCB board, a magnetic ring code disk 10, a thermally conductive patch (also known as a heat-conducting component), a heat sink bracket 50, and brush posts 90, etc. The overall number of parts is relatively small, which is beneficial for stable operation under harsh conditions. The magnetic ring code disk 10 is fixed to the end cover 80 with glue. The heat sink bracket 50 is fixed to the output shaft 22 of the motor with screws. When the output shaft 22 of the motor rotates, it drives the heat sink bracket 50 to rotate synchronously. The power supply ring 100 is fixed to the main body 21 of the motor. Specifically, the power supply ring 100 is fixed to the rear end cover of the main body 21. The power supply ring 100 contacts the brush posts 90 on the heat sink bracket 50. The brush posts 90 are fixed to the heat sink bracket 50 together with the encoder's PCB board via a connector 120. The PCB board and the heat sink bracket 50 are connected by the thermally conductive patch. Specifically, the connector 120 can be a screw.

[0097] The heat dissipation bracket 50 is made of copper alloy, which has the advantages of high thermal conductivity and good heat dissipation effect. In addition, heat dissipation fins are machined on the heat dissipation bracket to improve heat dissipation efficiency, which increases the contact area with air and can significantly improve heat dissipation efficiency.

[0098] The brush post 90 can contact the power supply ring 100 through the graphite material at its end. The brush post 90 has an elastic element (specifically a conductive spring) inside to keep the brush post 90 in continuous contact with the power supply ring 100. The middle of the brush post 90 has a conductive slider 92 to carry power, and the upper end has a threaded hole. The PCB board is locked onto the brush post 90 with screws to continuously receive power.

[0099] The PCB board has two magnetic induction chips for sensing the N and S poles of the magnetic ring encoder 10 above. The two magnetic induction chips can compare the positions of the two magnetic poles to obtain the current position angle information. The PCB board has two through holes for receiving power, and the PCB can be locked to the brush post 90 with screws.

[0100] Specifically, the magnetic ring encoder 10 is made of magnetic material.

[0101] The thermally conductive patch uses thermally conductive gel as the material. The thermally conductive gel has good fluidity and is suitable for filling irregular surfaces. After curing, it still has a certain elasticity and can fully fill the unevenness of the PCB board caused by the protrusion of various components.

[0102] Another embodiment of this utility model provides a motor including the magnetoelectric encoder provided in the above embodiment. Integrating the magnetoelectric encoder into the motor not only improves the control accuracy of the motor but also enhances its adaptability and reliability in harsh environments. In principle, the high precision and anti-interference characteristics of the magnetoelectric encoder enable the motor to detect and control its speed more accurately, maintaining stable performance even under high-power operation or strong magnetic interference environments. In terms of effect, the technical solution in this embodiment significantly improves the overall performance of the motor, especially in high-precision control and applications in harsh environments, showing obvious advantages. In other embodiments, the overall performance of the motor can be further improved by optimizing the matching between the motor and the encoder, such as improving the motor's cooling system or enhancing its vibration resistance, making it suitable for a wider range of applications.

[0103] The working process is as follows: When the motor starts and begins to rotate, the output shaft 22 of the motor drives the heat dissipation bracket 50 and the circuit board 30, which are fixedly connected to it, to rotate synchronously, while the magnetic ring encoder 10 is fixed on the end cover 80 and remains stationary. The magnetic sensing unit 40 on the circuit board 30 detects the changes in the magnetic field of the magnetic ring encoder 10 to obtain the motor's speed and position information in real time, and transmits this information to the motor controller through the signal line. During this process, the brush posts 90 maintain contact with the power supply ring 100 to provide a stable power supply to the circuit board 30. At the same time, as the heat dissipation bracket 50 rotates, the heat dissipation fins on it (including the first heat dissipation fin 52 and the second heat dissipation fin 53) dissipate heat through air convection, and the heat-conducting component 70 (such as thermal conductive gel) quickly conducts the heat generated by the circuit board 30 to the heat dissipation bracket 50, achieving efficient heat dissipation. Throughout the entire working process, the magneto-electric encoder can not only provide high-precision position and speed feedback, but also maintain stable operation in harsh environments, ensuring the precise control and long-term reliability of the motor.

[0104] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: they can adapt to extremely harsh environments and maintain unchanged performance; they reduce the impact of temperature on the magnetic induction chip, enabling it to operate at high power; and they optimize the power supply method, enabling the encoder to operate continuously under high power consumption.

[0105] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0106] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0107] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0108] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0109] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0110] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magneto-electric encoder, characterized in that, include: The magnetic ring encoder (10) is fixedly connected to the main body (21) of the motor; A circuit board (30) and a magnetic sensing unit (40), wherein the magnetic sensing unit (40) is disposed on the circuit board (30) and electrically connected to the circuit board (30), and the magnetic sensing unit (40) is disposed opposite to the magnetic ring encoder (10); A heat dissipation bracket (50) is fixedly mounted on the output shaft (22) of the motor. The output shaft (22) of the motor is rotatably arranged relative to the main body (21) of the motor so as to drive the heat dissipation bracket (50) to rotate through the output shaft (22) of the motor. The circuit board (30) is fixedly mounted on the heat dissipation bracket (50) and spaced apart from the output shaft (22) of the motor.

2. The magnetoelectric encoder according to claim 1, characterized in that, The heat dissipation bracket (50) is provided with a mounting hole that matches the output shaft (22) of the motor, and the heat dissipation bracket (50) is sleeved on the output shaft (22) of the motor through the mounting hole; and / or, The circuit board (30) is mounted on the end of the heat sink bracket (50) away from the output shaft (22) of the motor.

3. The magnetoelectric encoder according to claim 1, characterized in that, The heat dissipation bracket (50) includes: A heat dissipation body (51) is sleeved on the output shaft (22) of the motor; The first heat dissipation rib (52) is disposed at one end of the heat dissipation body (51) away from the output shaft (22) of the motor. The first heat dissipation rib (52) extends radially along the heat dissipation body (51), and the circuit board (30) is disposed on the first heat dissipation rib (52).

4. The magnetoelectric encoder according to claim 3, characterized in that, The heat sink bracket (50) also includes: The second heat dissipation rib (53) is disposed on the heat dissipation body (51) and extends radially along the heat dissipation body (51). The second heat dissipation rib (53) and the first heat dissipation rib (52) are spaced apart along the axial direction of the heat dissipation body (51) to form a heat dissipation gap.

5. The magnetoelectric encoder according to claim 4, characterized in that, The second heat dissipation rib (53) is at least two, and the at least two second heat dissipation ribs (53) are spaced apart along the axial direction of the heat dissipation body (51) to form a heat dissipation gap; and / or, The heat sink (50) is made of copper alloy; and / or, The heat dissipation body (51) is provided with a mounting hole that is adapted to the output shaft (22) of the motor. The heat dissipation body (51) is sleeved on the output shaft (22) of the motor through the mounting hole. The mounting hole is provided to pass through both ends of the heat dissipation body (51) along the axial direction. The magneto-electric encoder also includes a locking member (60). The locking member (60) passes through the mounting hole and is locked and connected to the output shaft (22) of the motor.

6. The magnetoelectric encoder according to claim 4, characterized in that, The first heat dissipation rib (52) has a mounting surface (521) extending radially along the main body (21), and the circuit board (30) is attached to the mounting surface (521).

7. The magnetoelectric encoder according to claim 4, characterized in that, The magneto-electric encoder also includes: A heat-conducting component (70) is disposed between the first heat dissipation rib (52) and the circuit board (30), and the heat-conducting component (70) is made of a heat-conducting material.

8. The magnetoelectric encoder according to claim 7, characterized in that, The end face of the heat dissipation body (51) away from the output shaft (22) of the motor and the mounting surface (521) of the first heat dissipation rib (52) are spaced apart along the axial direction of the heat dissipation body (51). The circuit board (30) is mounted on the end face of the heat dissipation body (51) away from the output shaft (22) of the motor. The heat-conducting element (70) is filled on the mounting surface (521) and the side of the circuit board (30) away from the magnetic sensing unit (40).

9. The magnetoelectric encoder according to claim 7, characterized in that, The thermally conductive element (70) is made of thermally conductive gel.

10. The magnetoelectric encoder according to claim 1, characterized in that, The magneto-electric encoder also includes: An end cap (80) is fixedly connected to the main body (21) of the motor and forms a protective cavity (81) with the main body (21) of the motor. At least a portion of the output shaft (22) of the motor, the circuit board (30) and the magnetic sensing unit (40) are all installed in the protective cavity (81). The magnetic ring encoder (10) is fixed on the end cap (80).

11. The magnetoelectric encoder according to claim 10, characterized in that, The end cap (80) includes a cover body portion (82) and a connecting portion (83) connected to each other. The cover body portion (82) forms at least a portion of the end cap (80). The connecting portion (83) is disposed within the protective cavity (81). The connecting portion (83) protrudes from the inner wall of the cover body portion (82) and extends in a direction close to the heat dissipation bracket (50). The magnetic ring encoder (10) is disposed at the end of the connecting portion (83) away from the cover body portion (82); and / or, The magnetic ring encoder (10) is bonded to the end cap (80).

12. The magnetoelectric encoder according to claim 1, characterized in that, The magneto-electric encoder also includes: The brush post (90) is fixedly connected to the circuit board (30) and electrically connected to the circuit board (30) so as to drive the brush post (90) to rotate through the circuit board (30); The power supply ring (100) is fixedly connected to the main body (21) of the motor, and the power supply ring (100) is in contact with the end of the brush post (90).

13. The magnetoelectric encoder according to claim 12, characterized in that, The magneto-electric encoder further includes an end cover (80), at least a portion of which is fixedly connected to the main body (21) of the motor and forms a protective cavity (81) with the main body (21). At least a portion of the output shaft (22) of the motor, the circuit board (30), and the magnetic sensing unit (40) are all installed inside the protective cavity (81). The end cover (80) is provided with a wiring hole (84) communicating with the protective cavity (81). The magneto-electric encoder further includes a power connection line (110), which is connected to a power supply device. The power connection line (110) passes through the wiring hole (84); and / or, The brush post (90) includes a graphite segment (91), a conductive slider (92), an elastic element (93), and a conductive connecting segment (94) connected in sequence. The graphite segment (91) is in contact with the power supply ring (100), and the conductive connecting segment (94) is connected to the circuit board (30).

14. An electric motor, characterized in that, The magneto-electric encoder included in any one of claims 1 to 13.

Images