Hall support and coreless brushless motor

Abstract

The invention relates to the technical field of motors, in particular to a Hall support and a coreless brushless motor, and a Hall plate is embedded in one side of a support body; a Hall plate mounting groove is formed in one side of the support body, at least two positioning columns are arranged in the Hall plate mounting groove, positioning holes matched with the positioning columns are formed in the Hall plate, and the positioning columns are inserted into the positioning holes; a Hall device is arranged on the Hall plate, a device groove matched with the Hall device is arranged in the Hall plate installation groove, and the Hall device is embedded in the device groove. Compared with the prior art, the Hall bracket and the coreless brushless motor have the advantages that a Hall device and a circuit welding point are effectively protected and isolated through a unique bracket structure design, and an enameled wire led out of a winding wire cup is prevented from being in contact with a PCB outgoing line welding point when the Hall position is adjusted, so that the risk of short-circuit damage of a Hall PCB is reduced, and the service life of the Hall device is prolonged. The reliability and stability of the motor are improved, and the problem of potential short circuit risk existing in the Hall alignment process in the prior art can be effectively solved.

Description

[Technical field]

[0001] The present invention relates to the technical field of motors, and in particular to a Hall bracket and a coreless brushless motor. [Background technology]

[0002] The coreless brushless motor is a DC permanent magnet servo micro motor. There are no teeth on the armature core, and the motor winding is made into a cup shape according to a special winding process. In the production process of the coreless brushless motor, the installation and alignment of the Hall plate is a key issue. Usually, when the Hall plate is pressed into the stator structure, the fixed position of the three-phase line is random. In order to ensure that the Hall device can be accurately aligned with the three-phase line, the position needs to be corrected again when assembling the Hall plate.

[0003] However, the PCB bracket commonly used in the prior art is only used to control the sensing position of the Hall device and the magnet and only plays a fixing role. Due to its structural limitations, the Hall device and circuit welding points of the Hall plate are exposed outside.

[0004] In actual production, the coreless brushless DC inductive motor has 8 lead wires. To allow the lead wires to be led out in parallel on one line, the solder joints of the 8 lead wires need to be arranged side by side. During installation, when the amplitude of the Hall position adjustment is large, the three enameled wires leading out of the winding cup and the solder joints of the lead wires on the PCB board are very likely to touch each other.

[0005] Moreover, due to structural limitations, after the bracket is installed and the Hall plate is aligned, it is difficult to see from a visual angle whether the enameled wire on the wire cup touches the solder joints on the Hall plate. Once the motor is powered on, it is easy to cause the entire Hall PCB board to be short-circuited and damaged, causing many inconveniences and safety hazards in production and use. [Summary of the invention]

[0006] In order to overcome the above problems, the present invention proposes a Hall bracket and a hollow cup brushless motor that can effectively solve the above problems.

[0007] The present invention provides a technical solution to solve the above technical problems: providing a Hall bracket, comprising a bracket body, one side of the bracket body is inlaid with a Hall plate; one side of the bracket body is provided with a Hall plate mounting groove, at least two positioning columns are arranged in the Hall plate mounting groove, and the Hall plate is provided with positioning holes matching the positioning columns, and the positioning columns are inserted into the positioning holes; the Hall plate is provided with a Hall device, and the Hall plate mounting groove is provided with a device groove matching the Hall device, and the Hall device is embedded in the device groove.

[0008] Preferably, a row of welding wire holes is provided on the Hall plate, and the welding wire holes are used to pass terminal wires for welding.

[0009] Preferably, a strip soldering point groove is provided in the Hall plate mounting groove, the position of the strip soldering point groove corresponds to the position of a row of welding wire holes, and the strip soldering point groove is used to accommodate the soldering points of the terminal wire and the Hall plate.

[0010] Preferably, the strip-shaped solder joint groove is isolated from the device groove and is not connected.

[0011] Preferably, a wire clamping block is provided on the side of the bracket body, and the wire clamping block is used to clamp the terminal wire.

[0012] Preferably, a first axial hole is opened in the middle of the bracket body for passing the motor shaft; and a second axial hole is arranged on the Hall plate for passing the motor shaft.

[0013] Preferably, the Hall plate is provided with a plurality of inner wire-passing holes, and positions of the inner wire-passing holes correspond one-to-one to positions of the wire-passing holes.

[0014] A hollow cup brushless motor, and the Hall bracket.

[0015] Preferably, the hollow cup brushless motor includes a motor housing, an iron core and a rear end cover, the iron core is arranged on the inner side of the motor housing, the Hall bracket is arranged on the inner side of one end of the motor housing, the Hall bracket is supported on one end of the iron core, the rear end cover is arranged at one end of the motor housing, and the Hall bracket is located on the inner side of the rear end cover; a coil is arranged on the inner side of the iron core; a front end cover is arranged at one end of the motor housing, bearings are arranged in the front end cover and the rear end cover, a motor shaft passes through the middle of the two bearings, an O-ring is arranged between the bearing and the front end cover, and an O-ring is arranged between the bearing and the rear end cover.

[0016] Preferably, a wire card is provided on the inner side of the rear end cover, a terminal wire through-hole is provided above the wire card, and the terminal wire extends into the motor housing from the terminal wire through-hole and is welded to the Hall plate; a wire card plate is provided on the side of the wire card, and the wire card plate supports the bottom of both sides of the wire card block, and the terminal wire passes between the wire card plate and the wire card block; a wire card accommodating groove is provided on the inner side of the rear end cover, a wire card positioning protrusion is provided in the wire card accommodating groove, a wire card positioning groove matching the wire card positioning protrusion is provided on the side of the wire card, the wire card is placed in the wire card accommodating groove, and the wire card positioning protrusion is inserted into the wire card positioning groove.

[0017] Compared with the prior art, the Hall bracket of the present invention effectively protects and isolates the Hall device and the circuit welding point through a unique bracket structure design, avoiding the enameled wire led out of the winding cup from touching the welding point of the PCB board lead wire when adjusting the Hall position, thereby reducing the risk of short-circuit damage to the Hall PCB board, improving the reliability and stability of the motor, and effectively solving the potential short-circuit risk problem in the Hall alignment process in the prior art. The Hall bracket can not only realize the precise alignment of the Hall device, but also facilitate the installation and debugging of the Hall PCB board assembly, reduce the problem of low production efficiency caused by inaccurate alignment, and improve production efficiency and product quality. The various parts of the bracket structure cooperate with each other, so that the Hall PCB board assembly can be more firmly installed on the stator structure during the operation of the motor, reducing the loosening and displacement of components caused by factors such as vibration, and further improving the overall performance of the motor.

Brief Description of the Drawings

[0018] Figure 1 It is a first stereoscopic diagram of the Hall bracket of the present invention;

[0019] Figure 2 A second stereoscopic view of the Hall bracket of the present invention;

[0020] Figure 3 An exploded view of the Hall bracket of the present invention;

[0021] Figure 4 A three-dimensional diagram of the Hall plate of the Hall bracket of the present invention;

[0022] Figure 5 It is a three-dimensional diagram of the coreless brushless motor of the present invention;

[0023] Figure 6 It is an axial cross-sectional view of the coreless brushless motor of the present invention;

[0024] Figure 7 A three-dimensional diagram of the rear end cover of the coreless brushless motor of the present invention;

[0025] Figure 8 An exploded view of the rear end cover of the coreless brushless motor of the present invention;

[0026] Fig. 9 It is a three-dimensional diagram of the line card of the hollow cup brushless motor of the present invention. [Specific implementation method]

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are limited to relative positions on the specified view, rather than absolute positions.

[0029] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] See also Figures 1 to 9 A Hall bracket of the present invention includes a bracket body 9, and a Hall plate 16 is embedded on one side of the bracket body 9.

[0031] A Hall plate mounting groove 93 is formed on one side of the bracket body 9 , at least two positioning posts 94 are disposed in the Hall plate mounting groove 93 , and a positioning hole 161 matching the positioning post 94 is disposed on the Hall plate 16 , and the positioning post 94 is inserted into the positioning hole 161 .

[0032] The Hall plate 16 is provided with a Hall device 165 . The Hall plate mounting groove 93 is provided with a device groove 95 matching the Hall device 165 . The Hall device 165 is embedded in the device groove 95 .

[0033] The bracket body 9 is provided with a plurality of wire holes 91 , and the wire holes 91 are used for threading wires and welding to the Hall plate 16 .

[0034] A first axial hole 92 is formed in the middle of the bracket body 9 for passing the motor shaft 10 .

[0035] The Hall plate 16 is provided with a row of welding wire holes 164 , and the welding wire holes 164 are used to pass the terminal wires 14 for welding, and there are eight welding wire holes 164 .

[0036] The Hall plate mounting groove 93 is provided with a strip soldering point groove 96, the position of which corresponds to the position of a row of soldering wire holes 164, and the strip soldering point groove 96 is used to accommodate the soldering points of the terminal wire 14 and the Hall plate 16. The strip soldering point groove 96 is isolated from the device groove 95 and is not connected.

[0037] The Hall plate 16 is provided with a second shaft hole 163 for passing the motor shaft 10 .

[0038] The Hall plate 16 is provided with a plurality of inner wire holes 162 , and the positions of the inner wire holes 162 correspond to the positions of the wire holes 91 one by one.

[0039] A wire clamping block 97 is disposed on the side of the bracket body 9 , and the wire clamping block 97 is used to clamp the terminal wire 14 .

[0040] A coreless brushless motor of the present invention comprises a Hall bracket of the present invention, a motor housing 7, an iron core 8 and a rear end cover 2, wherein the iron core 8 is arranged inside the motor housing 7, the Hall bracket is arranged inside one end of the motor housing 7, the Hall bracket is supported at one end of the iron core 8, the rear end cover 2 is arranged at one end of the motor housing 7, and the Hall bracket is located inside the rear end cover 2. A coil 15 is arranged inside the iron core 8.

[0041] A front end cover 1 is provided at one end of the motor housing 7, and bearings 6 are provided in the front end cover 1 and the rear end cover 2. The motor shaft 10 runs through the middle of the two bearings 6, an O-ring 5 is provided between the bearing 6 and the front end cover 1, and an O-ring 5 is provided between the bearing 6 and the rear end cover 2.

[0042] A wire clamp 3 is disposed inside the rear end cover 2 , and a terminal wire through hole 21 is disposed above the wire clamp 3 . The terminal wire 14 extends from the terminal wire through hole 21 into the motor housing 7 and is welded to the Hall plate 16 .

[0043] A third axial hole 31 is provided in the middle of the line clamp 3 for passing the motor shaft 10 .

[0044] A wire clamping plate 32 is disposed on the side of the wire clamp 3 , and the wire clamping plate 32 supports the bottom of both sides of the wire clamping block 97 , and the terminal wire 14 passes between the wire clamping plate 32 and the wire clamping block 97 .

[0045] A line card accommodating groove 24 is provided on the inner side of the rear end cover 2, a line card positioning protrusion 22 is provided in the line card accommodating groove 24, a line card positioning groove 33 matching the line card positioning protrusion 22 is provided on the side of the line card 3, the line card 3 is placed in the line card accommodating groove 24, and the line card positioning protrusion 22 is inserted into the line card positioning groove 33.

[0046] A fourth shaft hole 23 is provided in the middle of the rear end cover 2 for passing the motor shaft 10 .

[0047] A magnetic steel 11 is disposed on the motor shaft 10 , and balancing blocks 12 are disposed at both ends of the magnetic steel 11 .

[0048] The motor shaft 10 is connected with a copper sleeve 13 , and the copper sleeve 13 is located close to the Hall plate 16 .

[0049] The motor shaft 10 is sleeved with a spring 4 , and the spring 4 is located at one side of the front end cover 1 .

[0050] The motor shaft 10, the magnetic steel 11, the balancing block 12 and the copper sleeve 13 constitute the motor rotor.

[0051] The motor stator is made by pressing the iron core 8 into the casing 7, the coil 15 into the iron core 8, the Hall plate 16 is first assembled into the bracket body 9, and then the bracket body 9 with the Hall plate 16 is assembled into the casing 7 and the iron core 8 for support.

[0052] During assembly, three enameled wires are led out of the wire cup of the coil 15 through the wire holes 91 of the bracket body 9 and welded to the Hall plate 16 of the bracket body 9 , thereby completing the connection between the wire cup and the Hall plate 16 .

[0053] Then assemble the motor rotor into the casing 7, adjust the bracket body 9 installed in the casing 7, and adjust the alignment of the Hall device 165 in the bracket body 9 with the three-phase adjustment. Finally, install the end cover of the motor to complete the motor assembly.

[0054] The Hall bracket of the present invention is made into an integrated body bracket part and a closed bottom plate, and the three Hall devices 165 and other devices such as welding wire soldering points on the Hall plate 16 are covered separately to achieve an isolation effect, and then the three-phase wires of the winding coil are passed through the hollow part of the bracket and soldered on the Hall plate 16. Therefore, when debugging the three-phase and Hall positions, the contact points of the three-phase and 8p terminal wire soldering points are completely isolated, and even if there is a certain amplitude during debugging, the three-phase and 8p terminal wire soldering points will not touch each other.

[0055] During the debugging and assembly process, the assembly difficulty is reduced, defects caused by operational reasons are avoided, production losses are reduced, and defective products are avoided after the motor is assembled. The internal structure of the hollow cup brushless DC inductive motor is also more stable.

[0056] Compared with the prior art, the Hall bracket of the present invention effectively protects and isolates the Hall device 165 and the circuit welding point through a unique bracket structure design, avoiding the enameled wire led out of the winding cup from touching the welding point of the lead wire of the PCB board when adjusting the Hall position, thereby reducing the risk of short-circuit damage to the Hall PCB board, improving the reliability and stability of the motor, and effectively solving the potential short-circuit risk problem in the Hall alignment process in the prior art. The Hall bracket can not only realize the precise alignment of the Hall device 165, but also facilitate the installation and debugging of the Hall PCB board assembly, reduce the problem of low production efficiency caused by inaccurate alignment, and improve production efficiency and product quality. The various parts of the bracket structure cooperate with each other, so that the Hall PCB board assembly can be more firmly installed on the stator structure during the operation of the motor, reducing the loosening and displacement of components caused by factors such as vibration, and further improving the overall performance of the motor.

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any modifications, equivalent substitutions and improvements made within the concept of the present invention should be included in the patent protection scope of the present invention.

Claims

1. A Hall bracket, characterized in that: It comprises a bracket body, one side of which is inlaid with a Hall plate; A Hall plate mounting groove is provided on one side of the bracket body, at least two positioning posts are provided in the Hall plate mounting groove, and positioning holes matching the positioning posts are provided on the Hall plate, and the positioning posts are inserted into the positioning holes; The Hall plate is provided with a Hall device, the Hall plate mounting groove is provided with a device groove matching the Hall device, and the Hall device is embedded in the device groove; The bracket body is provided with a plurality of wire holes, and the wire holes are used for threading wires and welding the Hall plates.

2. The Hall bracket according to claim 1, characterized in that: The Hall plate is provided with a row of welding wire holes, and the welding wire holes are used to pass terminal wires for welding.

3. The Hall bracket according to claim 2, characterized in that: A strip soldering point groove is arranged in the Hall plate installation groove, the position of the strip soldering point groove corresponds to the position of a row of solder wire holes, and the strip soldering point groove is used to accommodate the soldering points of the terminal wire and the Hall plate.

4. The Hall bracket according to claim 3, characterized in that: The strip soldering point groove is isolated from the device groove and is not connected.

5. The Hall bracket according to claim 1, characterized in that: A wire clamping block is arranged on the side of the bracket body, and the wire clamping block is used for clamping the terminal wire.

6. The Hall bracket according to claim 1, characterized in that: A first axial hole is provided in the middle of the bracket body for passing the motor shaft; a second axial hole is provided on the Hall plate for passing the motor shaft.

7. The Hall bracket according to claim 1, characterized in that: The Hall plate is provided with a plurality of inner wire holes, and the positions of the inner wire holes correspond one to one with the positions of the wire holes.

8. A coreless brushless motor, characterized in that: Comprising a Hall bracket as described in any one of claims 1-7.

9. The Hall bracket and hollow cup brushless motor according to claim 8, characterized in that: It includes a motor housing, an iron core and a rear end cover, wherein the iron core is arranged on the inner side of the motor housing, the Hall bracket is arranged on the inner side of one end of the motor housing, the Hall bracket is supported on one end of the iron core, the rear end cover is arranged on one end of the motor housing, and the Hall bracket is located on the inner side of the rear end cover; a coil is arranged on the inner side of the iron core; a front end cover is arranged on one end of the motor housing, bearings are arranged in the front end cover and the rear end cover, a motor shaft passes through the middle of the two bearings, an O-ring is arranged between the bearing and the front end cover, and an O-ring is arranged between the bearing and the rear end cover.

10. The Hall bracket and coreless brushless motor according to claim 9, characterized in that: A wire card is arranged on the inner side of the rear end cover, and a terminal wire through hole is arranged above the wire card, and the terminal wire extends into the motor housing from the terminal wire through hole and is welded to the Hall plate; a wire card plate is arranged on the side of the wire card, and the wire card plate supports the bottom of both sides of the wire card block, and the terminal wire passes between the wire card plate and the wire card block; a wire card accommodating groove is arranged on the inner side of the rear end cover, and a wire card positioning protrusion is arranged in the wire card accommodating groove, and a wire card positioning groove matching the wire card positioning protrusion is arranged on the side of the wire card, the wire card is placed in the wire card accommodating groove, and the wire card positioning protrusion is inserted into the wire card positioning groove.

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