Compact direct current brushless motor and controller coaxial integrated device

Abstract

The utility model relates to the field of direct current motors, and discloses a compact direct current brushless motor and controller coaxial integrated device, which comprises a shell, a rear end cover and a front end cover are detachably mounted on two sides of the shell through quick-release structures, a stator is arranged on the inner wall of the shell, a rotor is arranged on the inner wall of the stator, and a rotor is arranged on the inner wall of the rotor. The inner wall of the shell is rotationally connected with a motor shaft, the two wedge blocks are elastically connected through a limiting spring, hinge rods are hinged to the outer walls of the two wedge blocks, pull rods are hinged to the ends, away from the wedge blocks, of the two hinge rods, and a control unit is arranged on the inner side wall of the rear end cover. According to the utility model, the rear end cover and the front end cover can be quickly disassembled through the application of the quick disassembly structure, parts such as a motor, a controller and the like inside can be conveniently overhauled and maintained, and when a fault occurs, a maintainer can quickly open the device, position the fault and repair the fault, so that the maintenance time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of DC motors, and in particular to a compact integrated device for coaxial brushless DC motor and controller. Background Technology

[0002] A brushless DC motor is a type of electric motor that mainly consists of a stator and a rotor. Its operating principle is similar to that of a traditional brushed DC motor, but it does not use brushes or a commutator.

[0003] In many industrial and consumer electronics fields, such as small robots, drones, and precision instruments, the demand for the integration and miniaturization of motors and controllers is growing. DC brushless motors are widely used due to their advantages such as high efficiency and low noise, while controllers are the key to ensuring the precise operation of motors.

[0004] Currently, existing motors have several shortcomings: Firstly, some motors have bolts on their surface that require special tools for disassembly and maintenance. However, in confined spaces, this necessitates complete disassembly of the entire motor, making quick disassembly of the motor housing impossible and time-consuming and labor-intensive during routine maintenance. Secondly, in terms of spatial layout, most traditional designs do not adequately consider compactness, resulting in a large overall size that cannot meet the space-constrained requirements of applications. For example, in micro-drones, a larger motor and controller increase the weight and size of the device, affecting flight performance. Therefore, a compact coaxial integrated device for a brushless DC motor and controller is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a compact integrated device for a DC brushless motor and controller on the same axis. It aims to improve the problem in the prior art that in a narrow space, the entire unit needs to be disassembled, which allows for easy disassembly of the motor housing but not quick disassembly, making routine maintenance time-consuming and labor-intensive.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a compact DC brushless motor and controller coaxial integrated device, including a housing, both sides of which are detachably mounted with a rear end cover and a front end cover via quick-release structures, a stator is provided on the inner wall of the housing, a rotor is provided on the inner wall of the stator, and a motor shaft is rotatably connected to the inner wall of the housing, and the quick-release structure includes a positioning block;

[0007] The inner wall of the positioning block is slidably connected with two sets of wedges, which are elastically connected by a limiting spring. The outer walls of the two sets of wedges are hinged with hinge rods, and the ends of the two hinge rods away from the wedges are hinged with pull rods. The inner side wall of the rear end cover is provided with a control unit.

[0008] As a further description of the above technical solution:

[0009] The control unit includes a controller power circuit. A controller PCB board is electrically connected to the top of the outer wall of the controller power circuit. A controller drive circuit is electrically connected to the left side of the top of the controller PCB board, and a controller protection circuit is electrically connected to the right side of the top of the controller PCB board.

[0010] As a further description of the above technical solution:

[0011] The positioning blocks are provided in two sets, and the two sets of positioning blocks are respectively fixedly connected to the inner sidewalls of the rear end cover and the front end cover.

[0012] As a further description of the above technical solution:

[0013] Positioning grooves are provided on both sides of the housing, and the outer wall of the positioning block is in contact with the inner wall of the positioning groove.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the housing positioning groove is provided with two sets of slots, and the wedge is engaged with the inner wall of the slot.

[0016] As a further description of the above technical solution:

[0017] The pull rod passes through and is slidably connected to the inner wall of the rear end cover.

[0018] As a further description of the above technical solution:

[0019] The outer sidewall of the rear end cover is in contact with the rear end surface of the housing.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the front cover is in contact with the surface of the front end of the housing.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the application of the quick-release structure enables the rear end cover and the front end cover to be quickly disassembled, which facilitates the inspection and maintenance of internal components such as motors and controllers. When a fault occurs, maintenance personnel can quickly open the device, locate the problem and repair it, which greatly shortens the maintenance time, reduces maintenance costs, improves the overall availability and reliability of the equipment, and helps to improve production efficiency and reduce operating costs.

[0024] 2. In this utility model, the coaxial stacking design of the motor and controller, as well as the precision machining of the motor stator and controller circuit board, ensure that the diameters of the two are consistent and can be installed in an integrated housing, which significantly reduces the overall size of the device. This compact design is very suitable for space-constrained application scenarios, and can effectively integrate the motor and controller in a limited space, providing strong support for the miniaturization of products, improving space utilization, and helping to expand the application range of products. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a compact DC brushless motor and controller integrated coaxial device proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the overall rear view structure of a compact DC brushless motor and controller coaxial integrated device proposed in this utility model;

[0027] Figure 3 This is a partial cross-sectional view of the housing and front cover of a compact integrated DC brushless motor and controller coaxial device proposed in this utility model.

[0028] Figure 4 This is a partial cross-sectional view of the rear end of the housing and the rear end cover of a compact DC brushless motor and controller coaxial integrated device proposed in this utility model.

[0029] Figure 5 This utility model proposes a compact integrated coaxial device for a brushless DC motor and controller. Figure 4 Enlarged structural diagram of section A;

[0030] Figure 6 This is a three-dimensional structural diagram of the control unit of a compact DC brushless motor and controller integrated coaxial device proposed in this utility model.

[0031] Legend:

[0032] 1. Housing; 2. Rear end cover; 3. Front end cover; 4. Quick release structure; 41. Positioning block; 42. Wedge block; 43. Limiting spring; 44. Hinge rod; 45. Pull rod; 5. Rotor; 6. Stator; 7. Motor shaft; 8. Control unit; 81. Controller power circuit; 82. Controller PCB board; 83. Controller protection circuit; 84. Controller drive circuit. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a compact DC brushless motor and controller coaxial integrated device, including a housing 1. Both sides of the housing 1 are detachably mounted with a rear end cover 2 and a front end cover 3 via quick-release structures 4. By providing two sets of quick-release front end covers 3 and rear end covers 2, the housing 1 can be quickly opened when inspecting the control unit 8 and its internal structure. The outer sidewall of the rear end cover 2 contacts the rear end surface of the housing 1, and the outer wall of the front end cover 3 contacts the front end surface of the housing 1. A stator 6 is provided on the inner wall of the housing 1, and a rotor 5 is provided on the inner wall of the stator 6. A motor shaft 7 is rotatably connected to the inner wall of the housing 1.

[0035] Reference Figure 4 and Figure 5 The quick-release structure 4 includes a positioning block 41. Positioning grooves are provided on both sides of the housing 1. The outer wall of the positioning block 41 contacts the inner wall of the positioning groove. The contact between the two allows the rear cover 2 and the front cover 3 to be positioned and installed. There are two sets of positioning blocks 41, which are fixedly connected to the inner side walls of the rear cover 2 and the front cover 3, respectively. Two sets of wedges 42 are slidably connected through the inner wall of the positioning block 41. The front ends of the two sets of wedges 42 are provided with inclined surfaces. By setting the inclined surfaces, when the positioning block 41 is inserted into the inner wall of the positioning groove, the inclined surfaces of the two wedges 42 will contact the inner wall of the positioning groove of the housing 1, thereby squeezing the inclined surfaces of the wedges 42 to make the wedges 42 move inward automatically without the need for manual pulling of the pull rod 45. Two sets of slots are provided on the inner wall of the positioning groove of the housing 1. The wedges 42 are engaged with the inner wall of the slots. The engagement between the two allows the rear cover 2 or the front cover 3 to be quickly fixed after being connected to the housing 1.

[0036] Reference Figure 4 and Figure 5 The two sets of wedges 42 are elastically connected by a limiting spring 43. By setting the limiting spring 43 between the two sets of wedges 42, the two sets of wedges 42 can automatically reset their positions after being squeezed by the inclined surface and pulled together by the pull rod 45 through the hinge rod 44. The outer walls of the two sets of wedges 42 are hinged with hinge rods 44, and the ends of the two sets of hinge rods 44 away from the wedges 42 are hinged with pull rods 45. The pull rods 45 pass through and slide on the inner wall of the rear end cover 2. When disassembling the rear end cover 2 or the front end cover 3, the pull rods 45 can be pulled outward to simultaneously pull the two sets of hinge rods 44, so that the two sets of wedges 42 can be brought together and disengaged from the slots in the positioning groove of the housing 1. Thus, the rear end cover 2 or the front end cover 3 can be quickly disassembled. The inner side wall of the rear end cover 2 is provided with a control unit 8.

[0037] Reference Figure 3 and Figure 6 The control unit 8 includes a controller power circuit 81. The top of the outer wall of the controller power circuit 81 is electrically connected to a controller PCB board 82. The left side of the top of the controller PCB board 82 is electrically connected to a controller drive circuit 84. The right side of the top of the controller PCB board 82 is electrically connected to a controller protection circuit 83. By setting a coaxial stacking structure, the heat-generating circuit components are placed in a concentrated manner and heat is dissipated through the rear cover 2. At the same time, it is very suitable for space-constrained application scenarios and is easy to install: the integrated design simplifies the installation steps, reduces the number of connecting cables, and reduces the system complexity and maintenance costs.

[0038] Working principle: When installing the rear end cover 2 or the front end cover 3, the positioning block 41 is aligned with the positioning groove of the housing 1 and inserted. During insertion, the inclined surface of the wedge block 42 contacts the inner wall of the positioning groove of the housing 1. Due to the action of the inclined surface, the wedge block 42 is squeezed and moves inward automatically, compressing the limiting spring 43. After the positioning block 41 is fully inserted into the positioning groove, the wedge block 42 returns to its original shape under the elastic action of the limiting spring 43 and is locked into the slot on the inner wall of the positioning groove, quickly fixing the rear end cover 2 or the front end cover 3 to the housing 1 and completing the installation process. There is no need for manual pre-pulling of the pull rod 45 to operate the wedge block 42.

[0039] Disassembly process: When it is necessary to disassemble the rear end cover 2 or the front end cover 3 for maintenance, pull the pull rod 45 outward. The pull rod 45 pulls the two sets of wedges 42 through the hinge rod 44, so that the two sets of wedges 42 move closer to each other and disengage from the locking groove on the inner wall of the positioning groove of the housing 1. At this time, the rear end cover 2 or the front end cover 3 is no longer fixed and can be removed from the housing 1 to achieve quick disassembly, which facilitates the maintenance of the internal motor structure and control unit 8.

[0040] The controller power circuit 81 is mainly responsible for handling the power conversion and control of the motor. It adjusts the power output of the motor according to the input control signal to meet the needs of different working conditions. The controller drive circuit 84 generates appropriate drive signals according to external control commands (such as speed setting, steering control, etc.) to drive the stator 6 of the motor to generate a corresponding rotating magnetic field, thereby controlling the speed and direction of the motor shaft 7. The controller protection circuit 83 monitors the operating status of the motor in real time, such as parameters like current, voltage, and temperature. When abnormal conditions are detected, including overcurrent, overvoltage, and overheating, protective measures are taken in time, such as cutting off the power supply or adjusting the operating parameters of the motor, to protect the safe operation of the motor and the entire device. At the same time, due to the coaxial stacking structure, the heat-generating circuit components are placed in a concentrated manner and heat is dissipated through the rear cover 2. The rear cover 2 can conduct the heat generated by the circuit components away and dissipate it into the surrounding environment, ensuring the normal operating temperature of the control unit 8. This is especially suitable for space-constrained applications, avoiding component damage or performance degradation due to poor heat dissipation.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A compact integrated device for coaxial use of a brushless DC motor and controller, comprising a housing (1), characterized in that: Both sides of the housing (1) are detachably fitted with a rear end cover (2) and a front end cover (3) via a quick-release structure (4). The inner wall of the housing (1) is provided with a stator (6), the inner wall of the stator (6) is provided with a rotor (5), and the inner wall of the housing (1) is rotatably connected with a motor shaft (7). The quick-release structure (4) includes a positioning block (41). The inner wall of the positioning block (41) is slidably connected to two sets of wedges (42). The two sets of wedges (42) are elastically connected by a limiting spring (43). The outer walls of the two sets of wedges (42) are hinged with hinge rods (44). The ends of the two sets of hinge rods (44) away from the wedges (42) are hinged with pull rods (45). The inner side wall of the rear end cover (2) is provided with a control unit (8).

2. The compact integrated brushless DC motor and controller device according to claim 1, characterized in that: The control unit (8) includes a controller power circuit (81), the top of the outer wall of the controller power circuit (81) is electrically connected to a controller PCB board (82), the left side of the top of the controller PCB board (82) is electrically connected to a controller drive circuit (84), and the right side of the top of the controller PCB board (82) is electrically connected to a controller protection circuit (83).

3. The compact integrated device for coaxial brushless DC motor and controller according to claim 1, characterized in that: The positioning block (41) is provided in two sets, and the two sets of positioning blocks (41) are respectively fixedly connected to the inner sidewalls of the rear end cover (2) and the front end cover (3).

4. The compact integrated DC brushless motor and controller coaxial device according to claim 1, characterized in that: The housing (1) has positioning grooves on both sides, and the outer wall of the positioning block (41) is in contact with the inner wall of the positioning groove.

5. A compact integrated device for a brushless DC motor and controller as described in claim 1, characterized in that: The inner wall of the positioning groove of the housing (1) is provided with two sets of slots, and the wedge (42) engages with the inner wall of the slot.

6. The compact integrated device for coaxial brushless DC motor and controller according to claim 1, characterized in that: The pull rod (45) passes through and is slidably connected to the inner wall of the rear end cover (2).

7. A compact integrated device for a brushless DC motor and controller as described in claim 1, characterized in that: The outer sidewall of the rear cover (2) is in contact with the rear surface of the housing (1).

8. The compact integrated device for coaxial brushless DC motor and controller according to claim 1, characterized in that: The outer wall of the front cover (3) is in contact with the surface of the front end of the shell (1).

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