Permanent magnet DC motor with damping effect and signal for Hall sensor

Abstract

This utility model discloses a permanent magnet DC motor with damping function and capable of providing signals to a Hall sensor. It includes a permanent magnet DC motor, characterized by further comprising a damper and a PCB board. The damper and PCB board are mounted at the tail end of the permanent magnet DC motor. When the permanent magnet DC motor is not energized, the damper impedes the rotation of the permanent magnet DC motor, achieving a self-locking capability of 20-40 mNm. When the permanent magnet DC motor is energized, the damper provides a changing magnetic field signal to the Hall sensor on the PCB board. This utility model has the advantages of simple structure and low cost.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet DC motor technology, and in particular to a permanent magnet DC motor with damping function and capable of providing signals to Hall sensors. Background Technology

[0002] Automotive functions such as roll-up windows, sunroofs, running boards, and tailgate supports require motors with self-locking capabilities. For example, in a car's electric tailgate strut, the motor operates to raise the tailgate and then stops; the strut needs to support the tailgate to prevent it from falling. If the motor has high cogging torque, it can possess a certain degree of self-locking capability to support the tailgate.

[0003] Existing permanent magnet DC brushed or brushless motors with diameters of 20-40mm have a cogging torque of 3-15mNm. The relatively small cogging torque means that the motor cannot meet the requirements for self-locking performance.

[0004] Chinese invention patent application publication number CN117248800A discloses a vehicle mechatronics opening and closing system, belonging to the technical field of vehicle opening and closing systems. This vehicle mechatronics opening and closing system is suitable for articulated connections in motor vehicles. It includes a ball-and-socket feature made of composite materials, a drive source, a main shaft transmission system, an elastomer, a damping system, a blocking mechanism, an elastomer guide tube, a moving end tubular component, and a driving end tubular component. The drive source and system structure are compact and simple, with many components using dual-material parts, such as the two ball-and-socket features of the electric opening and closing system, the gearbox housing, the spline sleeve, the lead screw transmission nut, and its support tube components. It incorporates riveting and welding technologies in many places, such as press riveting, spin riveting, and ultrasonic welding. This not only meets the system's performance requirements but also simplifies the system structure, reducing the number of components required compared to similar products on the market. However, this patent has a complex structure and high cost. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a permanent magnet DC motor with a simple structure and low cost that provides a signal to a Hall sensor, which is simple in structure and low in cost, and has a damping effect, in order to address the problems of complex architecture and high cost of existing vehicle mechatronic opening and closing systems with damping.

[0006] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0007] A permanent magnet DC motor with damping function and capable of providing signals to a Hall sensor is disclosed. The motor comprises a permanent magnet DC motor, characterized in that it further includes a damper and a PCB board. The damper and PCB board are mounted at the tail end of the permanent magnet DC motor. When the permanent magnet DC motor is not energized, the damper impedes the rotation of the permanent magnet DC motor, thereby achieving a self-locking capability of 20-40 mNm for the permanent magnet DC motor. When the permanent magnet DC motor is energized, the damper provides a changing magnetic field signal to the Hall sensor on the PCB board.

[0008] In a preferred embodiment of the present invention, the damper consists of a stator assembly and a rotor. The stator assembly is installed and fixed in the brush bracket of the permanent magnet DC motor, and the rotor is installed and fixed on the armature shaft of the permanent magnet DC motor.

[0009] In a preferred embodiment of the present invention, the stator assembly consists of a stator magnet and a metal shell. The stator magnet is installed and fixed inside the metal shell and then radially magnetized with 4 or 6 poles. The rotor consists of a rotor magnet and a silicon steel sheet assembly. The silicon steel sheet assembly is installed and fixed inside the rotor magnet and then radially magnetized with 4 or 6 poles.

[0010] Due to the adoption of the above technical solution, when the permanent magnet DC motor is not powered on, the damper hinders the rotation of the permanent magnet DC motor, so that the motor assembly has a self-locking capability of 20-40mNm; when the permanent magnet DC motor is powered on, the damper provides a changing magnetic field signal to the Hall sensor on the PCB board, which has the advantages of simple structure and low cost. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external shape of a permanent magnet DC motor that has a damping effect and can provide a signal to a Hall sensor according to the present invention.

[0012] Figure 2 This is one of the partial cross-sectional views of a permanent magnet DC motor with damping function and capable of providing signals to a Hall sensor according to this utility model.

[0013] Figure 3 This is one of the exploded schematic diagrams of a permanent magnet DC motor with damping function and capable of providing signals to a Hall sensor according to this utility model.

[0014] Figure 4 This is the second exploded schematic diagram of a permanent magnet DC motor with damping function and capable of providing signals to a Hall sensor according to this utility model.

[0015] Figure 5This is a schematic diagram of the damper structure of a permanent magnet DC motor that has a damping effect and can provide a signal to a Hall sensor according to the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] See Figures 1 to 5 The figure shows a permanent magnet DC motor with damping function and capable of providing signals to Hall sensors, comprising a permanent magnet DC motor 100.

[0018] The present invention is characterized by the following: it also includes a damper 200 and a PCB board 300, which are installed at the tail end of the permanent magnet DC motor 100, that is, at the end opposite to the output end of the permanent magnet DC motor 100.

[0019] The damper 200 consists of two parts: a stator assembly 210 and a rotor 220. The stator assembly 210 is installed and fixed inside the brush bracket 120 of the permanent magnet DC motor 100, and the rotor 220 is installed and fixed on the armature shaft 110 of the permanent magnet DC motor 100.

[0020] The stator assembly 210 consists of a stator magnet 211 and a metal housing 212. The stator magnet 211 is installed and fixed inside the metal housing 212, and then radially magnetized with 4 or 6 poles. The rotor 220 consists of a rotor magnet 221 and a silicon steel sheet assembly 222. The silicon steel sheet assembly 222 is installed and fixed inside the rotor magnet 221, and then the rotor 220 is radially magnetized with 4 or 6 poles.

[0021] When the permanent magnet DC motor 100 is not powered, the armature shaft 110 of the motor 100 tends to rotate relative to the armature shaft 110 of the permanent magnet DC motor 100 under the influence of external force. The rotor 220 of the damper 200 fixed to the armature shaft 110 of the permanent magnet DC motor 100 and the stator assembly 210 of the damper 200 fixed to the brush bracket 120 of the motor 200 will generate a torque resistance of 15-30mNm, so that the permanent magnet DC motor 100 has a self-locking capability of 20-40mNm. When the permanent magnet DC motor 100 is powered, the rotor 220 of the damper 200 provides a changing magnetic field signal to the Hall sensor 310 on the PCB board 300.

Claims

1. A permanent magnet DC motor with damping function and capable of providing a signal to a Hall sensor, comprising a permanent magnet DC motor, characterized in that, It also includes a damper and a PCB board, which are installed at the tail end of the permanent magnet DC motor. When the permanent magnet DC motor is not powered on, the damper prevents the permanent magnet DC motor from rotating, thereby enabling the permanent magnet DC motor to have a self-locking capability of 20-40mNm. When the permanent magnet DC motor is powered on, the damper provides a changing magnetic field signal to the Hall sensor on the PCB board.

2. A permanent magnet DC motor with damping function and capable of providing a signal to a Hall sensor according to claim 1, characterized in that, The damper consists of two parts: a stator assembly and a rotor assembly. The stator assembly is installed and fixed in the brush bracket of the permanent magnet DC motor, and the rotor assembly is installed and fixed on the armature shaft of the permanent magnet DC motor.

3. A permanent magnet DC motor with damping function and capable of providing a signal to a Hall sensor according to claim 2, characterized in that, The stator assembly consists of a stator magnet and a metal shell. The stator magnet is installed and fixed inside the metal shell and then radially magnetized with 4 or 6 poles. The rotor assembly consists of a rotor magnet and a silicon steel sheet assembly. The silicon steel sheet assembly is installed and fixed inside the rotor magnet and then radially magnetized with 4 or 6 poles.

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