Brushless motor drive components and electric furniture

Abstract

The present invention provides a brushless motor drive assembly and electric furniture, wherein the brushless motor drive assembly includes: an installation box, including a plastic box body and a plastic box cover provided at the mouth of the plastic box body, wherein the plastic box body and the plastic box cover are provided with a motor mounting position and a gear set mounting position that are interconnected; a brushless motor body, installed in the motor mounting position, wherein the brushless motor body includes a stator fixed in the motor mounting position and a rotor rotatably provided through the stator, wherein the rotor has an output shaft; and a gear set, installed in the gear set mounting position, wherein the gear set includes a worm and a worm wheel that cooperates with the worm gear, wherein the worm is drivingly connected to the output shaft of the brushless motor body. The technical solution of the present application effectively solves the problem in the related art that the outer shell of the brushed motor is made of metal, which makes the production cost of the drive assembly high. It also solves the problem in the related art that the drive assembly needs to be equipped with a sealed outer shell to play a waterproof role.

Description

Technical Field

[0001] The present invention relates to the field of furniture automation technology, and in particular to a brushless motor drive assembly and electric furniture. Background Art

[0002] The driving assembly in the related technology includes a motor, a gearbox and a push rod (or a bell). The gearbox includes a plastic box. The above-mentioned motor is a brushed motor. The casing of the brushed motor must be made of metal because it must be magnetic. If waterproofing is required, a sealed casing must be added to the outside of the entire driving assembly.

[0003] If the plastic housing of the gearbox and the housing of the brush motor are integrally formed, the housing of the brush motor can only be made of metal, which increases the production cost of the drive assembly. Summary of the Invention

[0004] The main purpose of the present invention is to provide a brushless motor drive assembly and electric furniture to solve the problem in the related art that the housing of the brush motor is made of metal material, which makes the production cost of the drive assembly high.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a brushless motor drive assembly is provided, comprising: an installation box, comprising a plastic box body and a plastic box cover arranged at the mouth of the plastic box body, the plastic box body and the plastic box cover being provided with a motor mounting position and a gear set mounting position that are interconnected; a brushless motor body, installed in the motor mounting position, the brushless motor body comprising a stator fixed in the motor mounting position and a rotor rotatably arranged through the stator, the rotor having an output shaft; a gear set, installed in the gear set mounting position, the gear set comprising a worm and a worm wheel matched with the worm gear, the worm being drivingly connected to the output shaft of the brushless motor body.

[0006] Furthermore, the plastic box body includes a cylindrical shell and a first half shell connected to one end of the cylindrical shell, the plastic box cover includes a second half shell connected to the first half shell, the interior of the cylindrical shell forms a motor mounting position, the first half shell and the second half shell together form a gear set mounting position, wherein the first half shell and the cylindrical shell are integrally formed plastic parts.

[0007] Furthermore, the brushless motor drive assembly also includes a mounting seat and a bearing. The bearing is sleeved on the output shaft, and the mounting seat is arranged on the motor mounting position. The mounting seat supports the bearing, and the mounting seat is limitedly matched with the bearing along the axial direction of the output shaft.

[0008] Furthermore, a notch is provided on the side wall of the mounting seat, and a U-shaped hole communicating with the notch is provided on the mounting seat, and the bearing is installed in the U-shaped hole.

[0009] Furthermore, the mounting seat includes a seat body and a first limit plate and a second limit plate arranged on the seat body, the notch and the U-shaped hole are both arranged on the seat body, the first limit plate and the second limit plate are respectively connected to the two ends of the seat body along the axial direction of the output shaft, and the bearing is limited between the first limit plate and the second limit plate.

[0010] Furthermore, the plastic box includes a box body and a mounting plate arranged in the box body. The mounting plate is provided with an avoidance hole for the output shaft to pass through. The mounting plate is also provided with a mounting groove connected to the avoidance hole. The first limit plate is located in the mounting groove, and the seat body is connected to the mounting plate.

[0011] Furthermore, the plastic box body includes a box body and a mounting plate arranged in the box body, the output shaft passes through the mounting plate, the mounting seat is connected to the mounting plate, and a block is provided on the mounting plate to block the gap. The block extends into the U-shaped hole along the radial direction of the output shaft and cooperates with the bearing stop.

[0012] Furthermore, the plastic box body includes a box body and an end cover arranged at the end of the box body. The end cover is arranged opposite to the plastic box body along the axial direction of the output shaft. A connecting limit column is provided on the inner side wall of the box body, and a limit groove is provided on the stator to be plugged into and cooperate with the connecting limit column. The end cover is connected to the connecting limit column by a fastener to fix the end cover to the box body.

[0013] Furthermore, the brushless motor body also includes a PCB board electrically connected to the stator and a power supply line electrically connected to the PCB board. The brushless motor drive assembly also includes an outer tube and an inner tube movably arranged in the outer tube. The outer tube is fixed to the plastic box cover and the plastic box body. The inner tube is connected to the worm gear drive through a screw assembly so that the inner tube can extend or retract relative to the outer tube. A communication element or a sensor element is also provided on the PCB board. The brushless motor drive assembly also includes a limit switch arranged on the gear set mounting position. The limit switch is connected to the PCB board signal. The limit switch is used to detect the retracted position of the inner tube.

[0014] Furthermore, the cross-sections of the outer tube and the inner tube are both circular; and the limit switch includes a micro switch.

[0015] Furthermore, the brushless motor drive assembly also includes an outer tube and an inner tube movably arranged in the outer tube, the outer tube is fixed to the plastic box cover and the plastic box body, and the inner tube is connected to the worm gear drive through a screw assembly so that the inner tube can extend or retract relative to the outer tube. The brushless motor drive assembly also includes a bracket clamped on the outside of the outer tube and an adapter box installed on the bracket, the adapter box is electrically connected to the brushless motor body, a card slot is provided on one of the bracket and the adapter box, and a hook is provided on the other of the bracket and the adapter box, and the hook is clamped in the card slot.

[0016] According to another aspect of the present invention, there is provided an electric furniture including a brushless motor drive assembly, wherein the brushless motor drive assembly is the brushless motor drive assembly described above.

[0017] According to the technical solution of the present invention, a brushless motor drive assembly includes a mounting box, a brushless motor body, and a gear set. The mounting box includes a plastic housing and a plastic cover positioned at the opening of the housing. The housing and cover are provided with interconnected motor and gear set mounting areas. The brushless motor body is mounted in the motor mounting area. The brushless motor body includes a stator fixed to the motor mounting area and a rotor rotatably inserted through the stator. The rotor has an output shaft. A gear set is mounted in the gear set mounting area. The gear set includes a worm and a worm wheel mated to the worm. The worm is drivingly connected to the output shaft of the brushless motor body. Thus, when the rotor rotates the output shaft, the output shaft drives the worm, which in turn drives the worm wheel. Because the brushless motor body and gear set are mounted in the plastic housing and cover, the brushless motor body and gear set share the same plastic housing and cover, eliminating the need for a metal housing. This helps reduce the production cost of the brushless motor drive assembly, thereby reducing the production cost of drive assemblies in the related art. Therefore, the technical solution of this application effectively solves the problem in related art where the housing of a brushed motor is made of metal, which increases the production cost of the drive assembly. Furthermore, compared to related art methods that require a sealed housing to provide waterproofing, this application utilizes a plastic housing and a plastic cover connected together to provide waterproofing, further eliminating the need for a sealed housing and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a brushless motor drive assembly according to the present invention is shown;

[0020] Figure 2 Shown Figure 1 A schematic cross-sectional view of the output shaft of the brushless motor drive assembly in the axial direction;

[0021] Figure 3 Shown Figure 1 A schematic cross-sectional view of the outer tube of the brushless motor drive assembly in the axial direction;

[0022] Figure 4 Shown Figure 1 A partially exploded structural diagram of a brushless motor drive assembly;

[0023] Figure 5 Shown Figure 4 An enlarged schematic diagram of point A of the brushless motor drive assembly;

[0024] Figure 6 Shown Figure 1 A partially exploded structural diagram of a brushless motor drive assembly from another perspective;

[0025] Figure 7 Shown Figure 6 An enlarged schematic diagram of point B of the brushless motor drive assembly;

[0026] Figure 8 Shown Figure 6 An enlarged schematic diagram of position C of the brushless motor drive assembly;

[0027] Figure 9 Shown Figure 1 Schematic diagram of the exploded structure of the installation box of the brushless motor drive assembly;

[0028] Figure 10 Shown Figure 1 Schematic diagram of the partial three-dimensional structure of the brushless motor drive component.

[0029] The above drawings include the following reference numerals:

[0030] 10. Mounting box; 101. Motor mounting position; 102. Gear assembly mounting position; 11. Plastic box body; 111. Cylindrical shell; 112. First half shell; 113. Mounting plate; 1131. Avoidance hole; 1132. Mounting slot; 1133. Stopper; 114. End cover; 115. Connecting limit column; 12. Plastic box cover; 121. Second half shell;

[0031] 20. Brushless motor body; 21. Stator; 211. Limiting slot; 22. Rotor; 221. Output shaft;

[0032] 30. Gear set; 31. Worm; 32. Worm wheel;

[0033] 40. Mounting seat; 41. Notch; 42. U-shaped hole; 43. Seat body; 44. First limiting plate; 45. Second limiting plate;

[0034] 50. Bearing; 51. Outer tube; 52. Inner tube; 53. Screw assembly;

[0035] 60. PCB board;

[0036] 71. Power supply line; 72. Limit switch;

[0037] 81. Bracket; 811. Card slot; 82. Adapter box; 821. Hook. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0041] like Figures 1 to 6As shown, the present application provides a brushless motor drive assembly. An embodiment of the brushless motor drive assembly includes: an installation box 10, a brushless motor body 20 and a gear set 30. The installation box 10 includes a plastic box body 11 and a plastic box cover 12 covering the mouth of the plastic box body 11. The plastic box body 11 and the plastic box cover 12 are provided with a motor mounting position 101 and a gear set mounting position 102 that are interconnected. The brushless motor body 20 is installed in the motor mounting position 101. The brushless motor body 20 includes a stator 21 fixed to the motor mounting position 101 and a rotor 22 rotatably passed through the stator 21. The rotor 22 has an output shaft 221. The gear set 30 is installed in the gear set mounting position 102. The gear set 30 includes a worm 31 and a worm wheel 32 that is in transmission cooperation with the worm 31. The worm 31 is drivingly connected to the output shaft 221 of the brushless motor body 20.

[0042] By applying the technical solution of the embodiment of the brushless motor drive assembly, when the rotor 22 drives the output shaft 221 to rotate, the output shaft 221 can drive the worm 31 to rotate, and the worm 31 can then drive the worm wheel 32 to rotate. Because the brushless motor body 20 and the gear set 30 are mounted within the plastic housing 11 and the plastic housing cover 12, the brushless motor body 20 and the gear set 30 share a common plastic housing 11 and the plastic housing cover 12, eliminating the need for a metal housing. This helps reduce the production cost of the brushless motor drive assembly, and thus reduces the production cost of the drive assembly in the related art. Therefore, the technical solution of the embodiment of the brushless motor drive assembly effectively solves the problem of the brushed motor housing in the related art being made of metal, which results in a high production cost of the drive assembly. Furthermore, compared to the related art drive assembly, which requires a sealed housing to provide waterproofing, the embodiment of the brushless motor drive assembly utilizes a plastic housing and a plastic housing cover connected together to provide waterproofing, further eliminating the need for a sealed housing and reducing production costs.

[0043] It should be noted that the driving connection between the worm 31 and the output shaft 221 of the brushless motor body 20 means that the worm 31 is fixedly connected to the output shaft 221 of the brushless motor body 20 or the worm 31 is integrally formed with the output shaft 221 of the brushless motor body 20, as long as there is a driving relationship between them.

[0044] Specifically, the rotor 22 includes a permanent magnet core and the output shaft 221 passing through the permanent magnet core.

[0045] like Figures 1 to 6As shown, the plastic housing 11 includes a cylindrical shell 111 and a first half shell 112 connected to one end of the cylindrical shell 111. The plastic cover 12 includes a second half shell 121 that docks with the first half shell 112. The interior of the cylindrical shell 111 forms a motor mounting position 101, and the first half shell 112 and the second half shell 121 together enclose a gear train mounting position 102. The first half shell 112 and the cylindrical shell 111 are integrally molded plastic parts. By using integrally molded plastic parts to construct the plastic housing 11 and plastic cover 12, the use of metal materials is reduced, thereby reducing costs. In addition, plastic materials generally provide better corrosion resistance and reduce weight, while integral molding means enhanced structural stability, reduced number of parts, simplified assembly process, and improved overall production efficiency and quality. This directly addresses the high cost of brushed motor drive assemblies caused by metal casings. The first half shell 112 docks with the second half shell 121 specifically via screws.

[0046] like Figures 1 to 6 As shown, the brushless motor drive assembly also includes a mounting seat 40 and a bearing 50. The bearing 50 is sleeved on the output shaft 221. The mounting seat 40 is set on the motor mounting position 101. The mounting seat 40 supports the bearing 50 and is limited in position with the bearing 50 along the axial direction of the output shaft 221. The design of the mounting seat 40 and the bearing 50 ensures the stability and rotational accuracy of the output shaft 221, because the bearing 50 can reduce friction and wear, improve mechanical efficiency, and extend the service life of the brushless motor drive assembly. The limiting function of the mounting seat 40 helps to maintain the correct position of the bearing 50, prevent the output shaft 221 from deviating, and thus improve the operational stability and reliability of the brushless motor drive assembly.

[0047] like Figures 4 to 7 As shown, a notch 41 is provided on the sidewall of the mounting base 40, and a U-shaped hole 42 is provided on the mounting base 40, which is connected to the notch 41. The bearing 50 is mounted in the U-shaped hole 42. The design of the notch 41 and the U-shaped hole 42 facilitates the assembly of the bearing 50 while ensuring the accurate positioning of the bearing 50. The U-shaped hole 42 provides sufficient radial support for the output shaft 221, while the notch 41 facilitates installation and maintenance. This not only reduces the difficulty of assembly, but also ensures the reliability of the bearing 50 when bearing radial forces, thereby improving the operating performance and maintenance convenience of the motor.

[0048] like Figures 4 to 7As shown, the mounting base 40 includes a base body 43 and a first limiting plate 44 and a second limiting plate 45 provided on the base body 43. The notch 41 and the U-shaped hole 42 are both provided on the base body 43. The first limiting plate 44 and the second limiting plate 45 are respectively connected to the two ends of the base body 43 along the axial direction of the output shaft 221, and the bearing 50 is limited between the first limiting plate 44 and the second limiting plate 45. The provision of the first limiting plate 44 and the second limiting plate 45 limits the axial movement range of the bearing 50, ensuring that the bearing 50 does not deviate axially during operation, thereby enhancing the rotational stability of the output shaft 221. This design helps to improve the efficiency of power transmission, reduce noise, and extend the service life of the brushless motor drive assembly. It also simplifies the axial positioning and adjustment process of the motor.

[0049] like Figures 4 to 7 and Figure 9 As shown, the plastic box body 11 includes a box body and a mounting plate 113 arranged in the box body, and the mounting plate 113 is provided with an avoidance hole 1131 for the output shaft 221 to pass through. The mounting plate 113 is also provided with a mounting groove 1132 connected to the avoidance hole 1131, the first limit plate 44 is located in the mounting groove 1132, and the base body 43 is connected to the mounting plate 113. The setting of the mounting plate 113 and the avoidance hole 1131 and the mounting groove 1132 thereon provides an additional radial support point for the output shaft 221, which helps to disperse the load, reduce the load on the main bearing, and improve the rigidity and load-bearing capacity of the overall structure. At the same time, the combination of the first limit plate 44 and the mounting plate 113 provides more accurate positioning of the bearing 50, making the output shaft 221 more reliable under higher loads, reducing power loss and vibration, and extending the service life of the brushless motor drive assembly. The base body 43 is preferably connected to the mounting plate 113 by screws.

[0050] The first half shell 112 and the cylindrical shell 111 together form the box body. This design strengthens the overall structure of the plastic box 11, ensuring a tight connection and seal between the motor mounting area 101 and the gear assembly mounting area 102, further enhancing the waterproof and dustproof capabilities. It also reduces the number of assembly steps in the manufacturing process, improving production efficiency and assembly accuracy.

[0051] like Figures 4 to 7 and Figure 9As shown, the plastic box body 11 includes a box body and a mounting plate 113 disposed inside the box body. The output shaft 221 passes through the mounting plate 113, and the mounting seat 40 is connected to the mounting plate 113. A stopper 1133 is provided on the mounting plate 113 to block the notch 41. The stopper 1133 extends into the U-shaped hole 42 along the radial direction of the output shaft 221 and cooperates with the bearing 50 stopper. The design of the stopper 1133 is intended to prevent external impurities from entering the bearing 50 area, protecting the bearing 50 from erosion by dust, moisture, etc., and extending the service life of the bearing 50. At the same time, the stopper 1133 cooperates with the stopper of the bearing 50 to further improve the radial positioning accuracy of the bearing 50, ensure the stability of the output shaft 221 when running at high speed or bearing large radial forces, reduce noise and vibration, and improve user experience.

[0052] like Figure 2 、 Figure 7 and Figure 9 As shown, the plastic box 11 includes a box body and an end cap 114 disposed at the end of the box body. The end cap 114 is disposed opposite the plastic box body 11 along the axis of the output shaft 221. A connecting limit post 115 is disposed on the inner side wall of the box body. The stator 21 is provided with a limit slot 211 that plugs into and mates with the connecting limit post 115. The end cap 114 is connected to the connecting limit post 115 via a fastener to secure the end cap 114 to the box body. The fastener is preferably a screw. The provision of the connecting limit post 115 facilitates screwing and securing the end cap 114 to the box body, and is also used to plug into and mate with the limit slot 211 to secure the stator.

[0053] like Figures 5 to 7 and Figure 9 As shown, the brushless motor body 20 also includes a PCB board 60 electrically connected to the stator 21 and a power supply line 71 electrically connected to the PCB board 60. The PCB board 60 is provided with a Hall element for detecting the position of the rotor 22. The Hall element and the power supply line 71 are integrated on the PCB board 60 for easy wiring.

[0054] like Figures 1 to 6As shown, the brushless motor body 20 also includes a PCB board 60 electrically connected to the stator 21 and a power supply line 71 electrically connected to the PCB board 60. The brushless motor drive assembly also includes an outer tube 51 and an inner tube 52 movably disposed within the outer tube 51. The outer tube 51 is fixed to the plastic box cover 12 and the plastic box body 11. The inner tube 52 is driven by the worm gear 32 via a lead screw assembly 53 to extend or retract the inner tube 52 relative to the outer tube 51. The PCB board 60 is also provided with a communication element or a sensor element. The brushless motor drive assembly also includes a limit switch 72 disposed on the gear assembly mounting position 102. The limit switch 72 is signal-connected to the PCB board 60 and is used to detect the retracted position of the inner tube 52. This limit switch 72 is signal-connected to the PCB board 60 to detect the retracted position of the inner tube 52, thereby implementing automatic position calibration of the motor, reducing the need for manual intervention and improving the degree of automation. This design enables the brushless motor drive assembly to maintain high position accuracy even after multiple runs, avoiding the effects of accumulated errors. It is particularly suitable for applications requiring frequent position adjustments, such as the lifting and lowering of electric furniture. Furthermore, the inclusion of a communication component enables real-time exchange of information between the brushless motor 20 and an external host computer, such as motor status and fault diagnosis, enhancing the intelligence and maintenance efficiency of electric furniture.

[0055] like Figures 1 to 6 As shown, the brushless motor drive assembly also includes an outer tube 51 and an inner tube 52 movably arranged in the outer tube 51. The outer tube 51 is fixed to the plastic box cover 12 and the plastic box body 11. The inner tube 52 is driven and connected to the worm gear 32 through the screw assembly 53 so that the inner tube 52 extends or retracts relative to the outer tube 51. The drive connection design of the screw assembly 53 and the worm gear 32 realizes the precise and smooth linear motion of the inner tube 52 relative to the outer tube 51. This mode of movement is more efficient and accurate than traditional gear rack or connecting rod mechanisms, especially in applications that require high-precision linear positioning, such as the positioning of parts of electric furniture. At the same time, the retractable characteristics of the inner tube 52 improve the application flexibility of the drive assembly and can adapt to the requirements of different lengths.

[0056] The inventors have discovered that the driving tube of a general driving assembly in the related art is horseshoe-shaped or special-shaped, because a support bar of a travel switch needs to be installed in the driving tube and a trigger point needs to be set at the inner tube.

[0057] like Figure 4 and Figure 5As shown, in this embodiment, the cross-sections of the outer tube 51 and the inner tube 52 are both circular; the circular cross-section has the same bending strength in all directions, so that the outer tube 51 and the inner tube 52 can provide more uniform support when subjected to radial forces, thereby enhancing the load-bearing capacity and stability of the brushless motor drive assembly. The limit switch 72 includes a micro switch. Due to the characteristics of rapid contact action and accurate positioning, the micro switch can achieve instant response to changes in the relative position of the outer tube 51 and the inner tube 52, ensuring that it is immediately triggered when the inner tube 52 retracts relative to the outer tube 51, achieving precise stroke control. The micro switch is preferably a rocker-type micro switch, which can eliminate the bracket bar for installing the micro switch and reduce costs.

[0058] Specifically, the screw assembly 53 includes a screw and a nut sleeved on the screw. The screw and the nut are in relative transmission cooperation. The screw is driven and connected to the worm gear 32. The screw is located in the outer tube 51 and the inner tube 52. The nut is connected to the inner tube 52. When the worm gear 32 drives the screw to perform spiral motion, the nut on the screw moves relative to the screw, so that the nut drives the inner tube 52 to extend or retract relative to the outer tube 51.

[0059] When the inner tube 52 extends relative to the outer tube 51 , the outer tube 51 and the inner tube 52 are lifted together. When the inner tube 52 retracts relative to the outer tube 51 , the outer tube 51 and the inner tube 52 are lowered together.

[0060] like Figure 6 、 Figure 8 and Figure 10 As shown, the brushless motor drive assembly also includes a bracket 81 that is snap-connected to the outside of the outer tube 51 and an adapter box 82 installed on the bracket 81. The adapter box 82 is electrically connected to the brushless motor body 20. A slot 811 is provided on the bracket 81, and a hook 821 is provided on the adapter box 82. The hook 821 is snap-connected in the slot 811. The snap-fit ​​connection between the adapter box 82 and the bracket 81 provides a reliable electrical and physical connection, which facilitates the interface management between the brushless motor body 20 and the host computer. The combined design of the slot 811 and the hook 821 simplifies the installation and disassembly process, reducing maintenance time and cost. This design also improves the modularity of the assembly, making it easier to combine or replace the motor drive assembly with other parts, and also facilitates troubleshooting and maintenance work.

[0061] In other embodiments, a card slot 811 is provided on the adapter box 82 , and a card hook 821 is provided on the bracket 81 .

[0062] Specifically, there are multiple slots 811, spaced apart along the axial direction of the outer tube 51. Two of the slots 811 are mirror-imaged on either side of the outer tube 51 in the axial direction, and two hooks 821 are mirror-imaged. Stop tabs and position-limiting tabs are spaced apart on the bracket 81 along the axial direction of the outer tube 51. When the hooks 821 slide into the slots 811 along the axial direction of the outer tube 51 and engage, the stop tabs stop the hooks 821, and the position-limiting tabs abut against the outer surface of the adapter box 82, thereby securing the adapter box 82 to the bracket 81.

[0063] The present application also provides electric furniture. Embodiments of the electric furniture include a brushless motor drive assembly, which is the brushless motor drive assembly described above. The electric furniture is preferably an electric sofa bed or electric chair. Because the brushless motor drive assembly described above can address the problem of high production costs associated with brushed motor housings made of metal in related art, electric furniture including this brushless motor drive assembly can address the same technical issues.

[0064] In the description of the present invention, it should be understood that "plurality" refers to a quantity of two or more than two. The directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the devices or components referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0067] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A brushless motor drive assembly, characterized in that: include: The mounting box (10) comprises a plastic box body (11) and a plastic box cover (12) provided at the mouth of the plastic box body (11), wherein the plastic box body (11) and the plastic box cover (12) are provided with a motor mounting position (101) and a gear set mounting position (102) that are interconnected; A brushless motor body (20) is mounted on the motor mounting position (101), the brushless motor body (20) comprising a stator (21) fixed to the motor mounting position (101) and a rotor (22) rotatably disposed through the stator (21), the rotor (22) having an output shaft (221); A gear set (30) is mounted on the gear set mounting position (102), wherein the gear set (30) comprises a worm (31) and a worm wheel (32) in driving engagement with the worm (31); the worm (31) is drivingly connected to an output shaft (221) of the brushless motor body (20); The brushless motor drive assembly further comprises a mounting seat (40) and a bearing (50), wherein the bearing (50) is sleeved on the output shaft (221), the mounting seat (40) is arranged on the motor mounting position (101), the mounting seat (40) supports the bearing (50), and the mounting seat (40) is limitedly engaged with the bearing (50) along the axial direction of the output shaft (221); A notch (41) is provided on the side wall of the mounting seat (40), a U-shaped hole (42) communicating with the notch (41) is provided on the mounting seat (40), and the bearing (50) is installed in the U-shaped hole (42); The mounting seat (40) includes a seat body (43) and a first limiting plate (44) and a second limiting plate (45) arranged on the seat body (43); the notch (41) and the U-shaped hole (42) are both arranged on the seat body (43); the first limiting plate (44) and the second limiting plate (45) are respectively connected to the two ends of the seat body (43) along the axial direction of the output shaft (221); and the bearing (50) is limited between the first limiting plate (44) and the second limiting plate (45).

2. The brushless motor drive assembly according to claim 1, wherein: The plastic box body (11) includes a cylindrical shell (111) and a first half shell (112) connected to one end of the cylindrical shell (111); the plastic box cover (12) includes a second half shell (121) connected to the first half shell (112); the motor mounting position (101) is formed inside the cylindrical shell (111); the first half shell (112) and the second half shell (121) together enclose the gear set mounting position (102); wherein the first half shell (112) and the cylindrical shell (111) are integrally formed plastic parts.

3. The brushless motor drive assembly according to claim 1, wherein: The plastic box (11) comprises a box body and a mounting plate (113) arranged in the box body, the mounting plate (113) being provided with a relief hole (1131) for the output shaft (221) to pass through, the mounting plate (113) being further provided with a mounting groove (1132) communicating with the relief hole (1131), the first limiting plate (44) being located in the mounting groove (1132), and the seat (43) being connected to the mounting plate (113).

4. The brushless motor drive assembly according to claim 1, wherein: The plastic box (11) comprises a box body and a mounting plate (113) arranged in the box body, the output shaft (221) passes through the mounting plate (113), the mounting seat (40) is connected to the mounting plate (113), and a stopper (1133) is provided on the mounting plate (113) for blocking the notch (41), and the stopper (1133) extends into the U-shaped hole (42) along the radial direction of the output shaft (221) and cooperates with the bearing (50) stopper.

5. The brushless motor drive assembly according to any one of claims 1 to 4, characterized in that: The plastic box body (11) includes a box body and an end cover (114) arranged at the end of the box body. The end cover (114) is arranged opposite to the plastic box body (11) along the axial direction of the output shaft (221). A connecting limit column (115) is provided on the inner side wall of the box body. The stator (21) is provided with a limit groove (211) that is plugged into and matched with the connecting limit column (115). The end cover (114) is connected to the connecting limit column (115) by a fastener to fix the end cover (114) to the box body.

6. The brushless motor drive assembly according to any one of claims 1 to 4, characterized in that: The brushless motor body (20) further comprises a PCB board (60) electrically connected to the stator (21) and a power supply line (71) electrically connected to the PCB board (60). The brushless motor drive assembly further comprises an outer tube (51) and an inner tube (52) movably arranged in the outer tube (51). The outer tube (51) is fixed to the plastic box cover (12) and the plastic box body (11). The inner tube (52) is drivingly connected to the worm gear (32) via a lead screw assembly (53) so that the inner tube (52) extends or retracts relative to the outer tube (51). A communication element or a sensor element is further provided on the PCB board (60). The brushless motor drive assembly further comprises a limit switch (72) arranged on the gear set mounting position (102). The limit switch (72) is signal-connected to the PCB board (60). The limit switch (72) is used to detect the retracted position of the inner tube (52).

7. The brushless motor drive assembly according to claim 6, wherein: The cross-sections of the outer tube (51) and the inner tube (52) are both circular; and the limit switch (72) comprises a micro switch.

8. The brushless motor drive assembly according to any one of claims 1 to 4, characterized in that: The brushless motor drive assembly further comprises an outer tube (51) and an inner tube (52) movably arranged in the outer tube (51), the outer tube (51) being fixed to the plastic box cover (12) and the plastic box body (11), the inner tube (52) being drive-connected to the worm gear (32) via a lead screw assembly (53) so that the inner tube (52) can be extended or retracted relative to the outer tube (51), the brushless motor drive assembly further comprises a bracket (81) clamped on the outside of the outer tube (51) and a transfer box (82) mounted on the bracket (81), the transfer box (82) being electrically connected to the brushless motor body (20), a card slot (811) being provided on one of the bracket (81) and the transfer box (82), and a card hook (821) being provided on the other of the bracket (81) and the transfer box (82), the card hook (821) being clamped in the card slot (811).

9. An electric furniture, comprising a brushless motor drive assembly, characterized in that: The brushless motor drive assembly is the brushless motor drive assembly according to any one of claims 1 to 8.

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