Hollow cup motor with split type Hall plate

Abstract

The utility model relates to the technical field of motors, in particular to a coreless motor with a split type Hall plate, which comprises a motor body and the split type Hall plate arranged in the motor body. The split type Hall plate comprises a winding leading-out PCB, a connecting support and a Hall plate, the winding leading-out PCB is fixedly connected in the motor body, the Hall plate is connected to the connecting support, and the connecting support is connected to the winding leading-out PCB. Compared with the prior art, the coreless motor with the split type Hall plate can effectively solve the problems that the Hall plate of the existing coreless brushless motor has a short circuit risk of scratching a coil lead in alignment and is inconvenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a hollow cup motor with split type hall board. BACKGROUND

[0002] As a kind of DC permanent magnet servo micro motor, hollow cup brushless motor has no tooth slot on armature core, and motor winding is made into cup type by special winding process.During motor assembly process, due to its special structure, the position of hall board needs to be adjusted to adapt winding position, and three-phase winding wire is usually welded on hall board and synchronously led out.

[0003] The hall board of prior art hollow cup brushless motor is usually integrated with hall device and its related circuit on a circuit board, and this integrated design has some problems.On the one hand, during installation of hollow cup brushless DC motor, integrated hall board is in installation alignment with motor three-phase wire, when the amplitude of adjusting hall position is large, the soldering point of winding wire cup leading-out enameled wire and PCB board leading-out wire is prone to touch risk, and short circuit risk is generated.For multipole hollow cup brushless motor, this disadvantage is particularly obvious.On the other hand, when hall board fails, it is inconvenient to repair or replace, and often the entire motor needs to be disassembled, which not only increases repair cost, but also can cause damage to other parts of motor, reduces the overall reliability of motor. UTILITY MODEL CONTENTS

[0004] In order to overcome the above problems, the utility model provides a hollow cup motor with split type hall board which can effectively solve the above problems.

[0005] The utility model provides a kind of hollow cup motor with split type hall board, including motor body and split type hall board, the split type hall board is set in motor body;The split type hall board includes winding leading-out PCB board, connecting bracket and hall board, the winding leading-out PCB board is fixedly connected in motor body, the hall board is connected on connecting bracket, and the connecting bracket is connected on winding leading-out PCB board.

[0006] Preferably, a bracket bayonet is formed on the winding leading-out PCB board, a circle of clamping steps is arranged on the connecting bracket, the clamping steps are pressed and buckled on the bracket bayonet, to realize the clamping fixation of connecting bracket and winding leading-out PCB board.

[0007] Preferably, a circle of supporting steps is arranged on the periphery of the clamping step, and the supporting steps are supported on the surface of winding leading-out PCB board.

[0008] Preferably, a wire hole is arranged on the periphery of the bracket bayonet, and the wire hole is used for wire connection with winding leading-out PCB board.

[0009] Preferably, the connecting support is provided with a Hall plate mounting groove, an installation step is arranged inside the Hall plate mounting groove, the Hall plate is connected in the Hall plate mounting groove, and one side edge of the Hall plate is supported on the installation step and fixed by gluing.

[0010] Preferably, the connecting support is made of race steel insulation material and is in a circular ring shape.

[0011] Preferably, the Hall plate is provided with a Hall device, a plurality of coil welding points and a circuit corresponding to the Hall device are arranged on the winding lead-out PCB board, and the Hall device is connected with the circuit on the winding lead-out PCB board 210 through a wire.

[0012] Preferably, the motor body comprises a stator assembly, the stator assembly comprises a shell, an iron core and a coil, the coil is arranged inside the iron core, and the iron core is arranged inside the shell; one end of the iron core is provided with a Hall assembly support, and the split Hall plate is supported on the Hall assembly support.

[0013] Preferably, the motor body comprises a rotor assembly, the rotor assembly comprises a shaft, a magnetic steel and a balance block, the shaft passes through the magnetic steel and the balance block, and the balance block is located at two ends of the magnetic steel.

[0014] Preferably, two ends of the shell are respectively provided with a front cover and a rear cover, bearings are arranged in the front cover and the rear cover, respectively, and two ends of the shaft pass through the bearings, respectively; the inner side of the rear cover is provided with a wire clamp, a gap is arranged between the wire clamp and the shell, and the gap is connected with the winding lead-out PCB board through a terminal wire.

[0015] Compared with the prior art, the hollow cup motor with the split Hall plate can effectively solve the problems of short circuit risk of coil lead caused by scratch in alignment and inconvenient maintenance of the existing hollow cup brushless motor Hall plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole view of the hollow cup motor with the split Hall plate of the utility model;

[0017] Figure 2 It is a first exploded view of the hollow cup motor with the split Hall plate of the utility model;

[0018] Figure 3 It is a second exploded view of the hollow cup motor with the split Hall plate of the utility model;

[0019] Figure 4 It is a first perspective view of the split Hall plate of the hollow cup motor with the split Hall plate of the utility model;

[0020] Figure 5 The second perspective view of the split type Hall plate of the hollow cup motor with the split type Hall plate;

[0021] Figure 6 The split type Hall plate of the hollow cup motor with the split type Hall plate;

[0022] Figure 7 The connection bracket structure diagram of the hollow cup motor with the split type Hall plate.

CONCRETE IMPLEMENTATIONS

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clearly and clearly, the utility model is further described in detail below in combination with the drawings and implementation examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only for relative positions on the specified view, not absolute positions.

[0025] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0026] Please refer to Figures 1 to 7 The hollow cup motor with the split type Hall plate of the utility model, including motor body 100 and split type Hall plate 200, split type Hall plate 200 is arranged in motor body 100.

[0027] The split type Hall plate 200 includes winding lead-out PCB board 210, connection bracket 220 and Hall plate 230, winding lead-out PCB board 210 is fixedly connected in motor body 100, Hall plate 230 is connected on connection bracket 220, connection bracket 220 is connected on winding lead-out PCB board 210. The function of Hall plate 230 is: 1. Rotor position detection; 2. Realize electronic commutation of motor; 3. Improve the control accuracy and efficiency of motor; 4. Enhance the stability and reliability of motor.

[0028] The connecting bracket 220 plays a mechanical supporting role in fixing the winding lead-out PCB board 210 and the Hall plate 230. Meanwhile, if the winding lead-out PCB board 210 or the Hall plate 230 needs to be repaired, replaced or upgraded, it can be conveniently and quickly detached from the connecting bracket 220.

[0029] The winding lead-out PCB board 210 is provided with a bracket bayonet 211, and the connecting bracket 220 is provided with a ring of clamping steps 221, which are clamped and buckled on the bracket bayonet 211 to achieve clamping and fixing of the connecting bracket 220 and the winding lead-out PCB board 210.

[0030] The connecting bracket 220 is provided with a ring of support steps 222 around the clamping steps 221, which are supported on the surface of the winding lead-out PCB board 210.

[0031] The winding lead-out PCB board 210 is provided with a ring of wire holes 212 around the bracket bayonet 211, which are used for wire connection with the winding lead-out PCB board 210.

[0032] The connecting bracket 220 is provided with a Hall plate mounting groove 223, and the inner side of the Hall plate mounting groove 223 is provided with a mounting step 224. The Hall plate 230 is connected in the Hall plate mounting groove 223, and one side edge of the Hall plate 230 is supported on the mounting step 224 and fixed by glue.

[0033] The winding lead-out PCB board 210 is made according to the conventional printed circuit board manufacturing process. According to the specific parameters of the motor and the winding lead-out requirements, professional PCB design software is used for wiring and pad design, and then the PCB board with corresponding lines, pads and vias is made through etching, drilling, copper plating and other processes to ensure good conductivity and insulation performance.

[0034] The connecting bracket 220 is made of stainless steel insulating material and has a circular shape. The connecting bracket 220 is provided with a Hall plate mounting groove 223. The Hall plate 230 is placed in the Hall plate mounting groove 223 and fixed by glue. The size of the Hall plate mounting groove 223 can be customized according to the size of the Hall plate 230. After the Hall plate 230 and the connecting bracket 220 are assembled, they are mounted together by buckling.

[0035] The connecting bracket 220 is made of high-strength and good-insulation engineering plastic particles, and appropriate additives are added to improve its performance. Through the injection molding process, the plastic particles are heated and melted in the mold, and then injected into the mold cavity under high pressure. After cooling and solidification, the connecting bracket with specific shape, size and precision requirements is formed, which can stably connect the winding lead-out PCB board and the Hall plate and provide reliable electrical insulation.

[0036] The Hall plate 230 is provided with a Hall device, and the winding lead-out PCB 210 is provided with a plurality of coil welding points to adapt to various wiring methods such as star connection and delta connection, and is also provided with a circuit corresponding to the Hall device. The Hall device is connected to the circuit on the winding lead-out PCB 210 through a wire.

[0037] The Hall plate 230 is designed and manufactured according to the size and electrical connection requirements of the Hall device, and the Hall device and other supporting electronic components such as resistors and capacitors are installed on the circuit board through welding, patching and other processes, so as to ensure that the Hall device can accurately perceive the change of the magnetic field and output the corresponding electrical signal, and ensure the electrical performance and reliability of the circuit board.

[0038] Since the PCB and the Hall plate are separate, the coil lead-out wire is welded on the PCB, so the PCB is fixed when rotating the Hall plate and adjusting the three-phase position, which solves the risk of scratching the coil lead-out wire when the integrated Hall plate is adjusted. When the Hall device on the Hall plate is damaged or fails, it only needs to be pulled out for maintenance and replacement, which solves the problem of disassembling the integrated Hall plate and the coil lead-out wire, and is beneficial to production and maintenance. In actual application, the shape, size and mounting direction of the connecting bracket, the PCB and the Hall plate on the bracket can be flexibly adjusted according to specific needs and space layout.

[0039] The split Hall plate structure realizes the split mounting of the PCB and the Hall plate, has the advantages of compact structure, convenient installation, easy maintenance, high relative position accuracy, and can be widely applied to various motor equipment with special requirements for the combination structure of the Hall plate and the PCB.

[0040] The motor body 100 includes a stator assembly, the stator assembly includes a housing 130, an iron core 131 and a coil 132, the coil 132 is arranged inside the iron core 131, and the iron core 131 is arranged inside the housing 130. The iron core 131 is pressed into the housing 130, the coil 132 is pressed into the iron core 131, and the assembled split Hall plate 200 is supported in the housing 130 and the iron core 131. The functions of the stator assembly are as follows: 1. generating a rotating magnetic field; 2. interacting with the rotor to drive the rotor to rotate; 3. providing a magnetic circuit for the magnetic field of the motor; and 4. providing a rotor position contact function (Hall sensor).

[0041] The three enameled wires led out from the stator winding wire cup pass through the hollow part of the bracket, are welded on the PCB of the split Hall plate, and are connected to the PCB. Then the rotor assembly is assembled into the housing, and the Hall device of the split Hall plate is adjusted to be in position with the three-phase adjustment. Finally, the end cover of the motor is assembled, and the motor assembly is completed.

[0042] One end of the iron core 131 is provided with a Hall component support 180, and the split Hall plate 200 is supported on the Hall component support 180.

[0043] The motor body 100 comprises a rotor assembly, the rotor assembly comprises a shaft 150, a magnetic steel 151 and a balance block 152, the shaft 150 passes through the magnetic steel 151 and the balance block 152, and the balance block 152 is located at both ends of the magnetic steel 151. The shaft 150, the magnetic steel 151 and the balance block 152 are adhesively assembled. The rotor assembly functions: 1. generating electromagnetic torque; 2. interacting with the stator magnetic field to ensure normal operation of the motor; 3. determining the speed and torque characteristics of the motor.

[0044] Both ends of the casing 130 are respectively provided with a front cover 140 and a rear cover 110, bearings 160 are arranged in the front cover 140 and the rear cover 110, and both ends of the shaft 150 pass through the bearings 160.

[0045] The inner side of the rear cover 110 is provided with a wire clamp 120, a gap is arranged between the wire clamp 120 and the casing 130, and the gap is connected with the winding lead-out PCB board 210 through the terminal wire 190.

[0046] The hollow cup motor with the split Hall plate comprises a motor body 100, a casing 130 and a Hall component 300.

[0047] In the hollow cup brushless motor, the split Hall plate 200 structure is adopted, so that the assembly efficiency and reliability of the motor can be significantly improved. In the assembly process, the winding lead-out PCB board 210 is first fixed at the corresponding position of the motor, then the connecting bracket 220 is installed on the winding lead-out PCB board 210, and finally the Hall plate 230 is fixed on the connecting bracket 220. When the position of the Hall plate 230 needs to be adjusted to adapt to the winding, the Hall plate 230 can be easily moved on the connecting bracket 220 until the best position is reached, without worrying about affecting the already welded winding wire.

[0048] Compared with the prior art, the hollow cup motor with the split Hall plate has the following beneficial effects:

[0049] 1. Improve assembly efficiency and quality: The split structure makes the adjustment of the Hall plate more flexible and convenient, without the need for complex adjustment or reassembly of the entire motor as in the traditional structure, greatly shortening the assembly time and improving the production efficiency. At the same time, it avoids the risk of short circuit caused by the scratch of the coil during the adjustment of the Hall plate, improves the assembly quality and reduces the scrap rate. The detachable connection makes assembly and disassembly more convenient, and can be converted between Hall and no Hall, which is beneficial to production and maintenance.

[0050] 2. Reduce short circuit risk: By fixing the winding lead-out PCB board and adjusting the position of the Hall plate only, the contact between the winding wire and the PCB board solder joint during adjustment is fundamentally eliminated, effectively reducing the probability of short circuit failure, improving the electrical reliability and stability of the motor, and ensuring the normal and stable operation of the motor.

[0051] 3. Easy to repair and replace and reduce cost: When the Hall plate fails, the entire motor does not need to be disassembled, only the fixing device between the Hall plate and the connecting bracket needs to be disassembled, and the Hall plate can be easily removed for repair or replacement, which is simple and fast, not only reduces the maintenance cost and time, but also reduces the risk of damage to other parts of the motor, which is beneficial to maintain the overall performance and reliability of the motor, improves the maintainability and service life of the motor.

[0052] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any modification, equivalent replacement and improvement within the concept of the present application shall be included in the patent protection range of the present application.

Claims

1. A hollow cup motor with a split Hall plate, characterized in that, It includes a motor body and a split Hall plate, wherein the split Hall plate is disposed within the motor body; The split-type Hall plate includes a winding lead-out PCB board, a connecting bracket, and a Hall plate. The winding lead-out PCB board is fixedly connected to the motor body, the Hall plate is connected to the connecting bracket, and the connecting bracket is connected to the winding lead-out PCB board.

2. The hollow cup motor with a split Hall plate as described in claim 1, characterized in that, The winding lead-out PCB board has a bracket slot, and the connecting bracket has a ring of locking steps. The locking steps are snapped into the bracket slot to achieve the locking and fixing of the connecting bracket and the winding lead-out PCB board.

3. The hollow cup motor with a split Hall plate as described in claim 2, characterized in that, A supporting step is provided around the periphery of the snap-fit ​​step, and the supporting step is supported on the surface of the winding lead-out PCB board.

4. The hollow cup motor with a split Hall plate as described in claim 2, characterized in that, The bracket bayonet is provided with wire-passing holes around its perimeter, which are used for threading wires and connecting them to the winding lead-out PCB board.

5. The hollow cup motor with a split Hall plate as described in claim 1, characterized in that, The connecting bracket is provided with a Hall plate mounting groove, and an installation step is provided inside the Hall plate mounting groove. The Hall plate is connected to the Hall plate mounting groove, and one edge of the Hall plate is supported on the installation step and fixed with glue.

6. The hollow cup motor with a split Hall plate as described in claim 1, characterized in that, The connecting bracket is made of acetal insulating material and is circular in shape.

7. The hollow cup motor with a split Hall plate as described in claim 1, characterized in that, The Hall plate is equipped with Hall devices, and the winding lead-out PCB is equipped with multiple coil solder points and circuits corresponding to the Hall devices. The Hall devices are connected to the circuits on the winding lead-out PCB (210) through wires.

8. The hollow cup motor with a split Hall plate as described in claim 1, characterized in that, The motor body includes a stator assembly, which includes a housing, an iron core, and a coil. The coil is disposed inside the iron core, and the iron core is disposed inside the housing. A Hall component bracket is disposed at one end of the iron core, and the split Hall plate is supported on the Hall component bracket.

9. The hollow cup motor with a split Hall plate as described in claim 8, characterized in that, The motor body includes a rotor assembly, which includes a shaft, magnets, and balance blocks. The shaft passes through the magnets and balance blocks, and the balance blocks are located at both ends of the magnets.

10. The hollow cup motor with a split Hall plate as described in claim 9, characterized in that, The housing has a front cover and a rear cover at both ends, and bearings are installed inside the front cover and the shaft passes through the bearings at both ends. A wire clip is installed on the inner side of the rear cover, and a gap is provided between the wire clip and the housing. A terminal wire passes through the gap and connects to the winding lead-out PCB board.

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