Motor and air conditioner

Abstract

The present disclosure relates to an electric machine and an air conditioner. The electric machine comprises a brake outgoing line cover without an independent cavity, the brake outgoing line cover comprising a sealing groove, a boss and an assembly hole; a sealing element is fitted and installed in the sealing groove, the boss is distributed on the groove wall of the sealing groove, and the boss is used to prevent the sealing element from falling out of the sealing groove.

Description

Technical Field

[0001] This disclosure relates to the field of electric motors, and more particularly to an electric motor and an air conditioner. Background Technology

[0002] As a core actuator in industrial automation, robotics, and precision motion control, the motor's brake cable exit structure directly affects its overall size and compact design adaptability. The brake cable needs to be connected to the external circuit through a specific exit structure, while ensuring the cable's fixation and protection. The rationality of this structure is crucial to the motor's integration capability in miniaturized equipment.

[0003] In existing technologies, the exit function of the motor brake cable is mainly achieved through a "brake cable exit cover with an independent cavity." That is, to prevent the brake cable from being exposed or damaged by external forces, existing solutions assemble an exit cover with an independent cavity on the motor end cover, completely housing the brake cable harness within this independent cavity. The cavity's wall structure provides cable containment and protection. However, this design has a significant drawback: because the independent cavity needs sufficient depth to accommodate the brake cable harness, including the harness's diameter and assembly allowance, the overall height of existing brake cable exit covers generally exceeds 5mm, significantly increasing the axial dimension of the motor end. In compact motor applications, this redundant space created by the independent cavity not only wastes valuable installation space but also directly limits the integrated application of the motor in miniaturized devices.

[0004] Furthermore, while existing technologies have proposed improvement solutions for issues such as brake failure and encoder output limitations, they have not addressed the core pain point of "excessive space occupation due to the independent cavity of the brake outlet cover," and have failed to solve the balance between compactness and cable protection from the perspective of outlet cover structure design. The aforementioned technical bottlenecks have not yet been effectively overcome. Utility Model Content

[0005] This disclosure provides an electric motor to solve the technical problem in the prior art where the brake cable outlet cover occupies too much space due to its independent cavity.

[0006] The motor provided in this embodiment includes a brake cable outlet cover. The brake cable outlet cover has no independent cavity and includes a sealing groove and a boss. A sealing element is adapted to be installed in the sealing groove, and the boss is distributed on the groove wall of the sealing groove. The boss is used to prevent the sealing element from falling out of the sealing groove.

[0007] The motor includes an end cover, and the brake outlet cover includes an assembly hole for inserting a first fastener to assemble and fix the brake outlet cover to the end cover.

[0008] The motor includes a power cord, and the height of the brake outlet cover is set so as not to interfere with the reverse outlet of the power cord.

[0009] The motor also includes a power cord socket, which is configured to accommodate power cord connectors of different structures. The power cord is connected to the power cord socket through the power cord connectors so that the power cord can exit in either the forward or reverse direction.

[0010] The end cap includes reinforcing ribs, a cable outlet, and a receiving groove. The reinforcing ribs include a large reinforcing rib and a small reinforcing rib, and the small reinforcing rib is formed by splitting the large reinforcing rib below the cable outlet. The motor includes a brake assembly, and the brake assembly includes a brake wire. After the end cap is assembled with the brake assembly, the two small reinforcing ribs and the brake assembly enclose the receiving groove to accommodate the brake wire.

[0011] The motor further includes a rotor assembly, and the brake assembly further includes an integral brake and a gear; the gear is press-fitted to the rear end of the rotor assembly, the integral brake is sleeved on the shaft of the rotor assembly, and the integral brake is assembled and cooperated with the gear, and the integral brake is positioned and assembled through the gear and the shaft of the rotor assembly.

[0012] The integral brake has multiple through holes, which are evenly distributed along the circumference of the integral brake. The through holes are used to insert a second fastener. The large reinforcing rib of the end cap is provided with a threaded hole. The integral brake is assembled and fixed to the threaded hole of the end cap by the second fastener.

[0013] The rotor assembly has bearings mounted at both ends of its shaft. The bearing at the rear end of the shaft abuts against the side of the integral brake away from the gear. The bearing at the rear end is used to fix the brake assembly to the shaft of the rotor assembly.

[0014] The large reinforcing ribs are multiple in number and are distributed circumferentially along the end cap; both the large and small reinforcing ribs are in direct contact with the integral brake.

[0015] The connection between the power cord and the brake cord is provided with an insulating protective structure, which includes insulating tape and heat shrink tubing. The insulating tape is wrapped around the outside of the connection, and the heat shrink tubing is sleeved on the outside of the insulating tape. The heat shrink tubing is heated and then tightly adhered to the surface of the insulating tape.

[0016] The motor further includes an encoder assembly and an encoder cover; the encoder assembly is mounted on the side of the end cover away from the brake assembly, and the encoder cover is fitted over the outside of the encoder assembly to protect the encoder assembly.

[0017] The sealing groove and the sealing element are provided with a dimensional tolerance, which is configured to adjust the compression ratio of the sealing element and the fill factor of the sealing groove.

[0018] This disclosure also provides an air conditioner, including the motor described above.

[0019] The technical solutions provided in this disclosure have the following advantages compared with the prior art: The motor and air conditioner provided in this disclosure, through a structure without an independent cavity, break away from the existing solution that requires reserved cavity depth to accommodate the wiring harness, significantly reducing the axial height of the outlet cover and effectively reducing redundant space occupied at the motor end, making the motor more suitable for the integration needs of miniaturized equipment. At the same time, the matching fit between the sealing groove and the sealing element can form an effective sealing barrier at the assembly interface between the outlet cover and the end cover, preventing external dust, moisture and other impurities from entering the motor, avoiding failure of the brake wire and internal components due to environmental factors, and ensuring the long-term reliability of the motor operation. In addition, the protrusions on the sealing groove wall prevent the sealing element from falling off through physical limiting, which not only avoids rework caused by the displacement of the sealing element during assembly, thus improving assembly efficiency, but also prevents the sealing element from falling off due to vibration and temperature changes during long-term use, ensuring a continuous and stable sealing effect, and reducing maintenance needs and costs. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a schematic diagram of the cross-sectional structure of the motor provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of the axonal structure of the brake assembly provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the axial structure of the end cap provided in an embodiment of the present disclosure; Figure 4 A schematic diagram of the axial structure of the cable outlet cover provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the assembly structure of the brake provided in an embodiment of the present disclosure; Figure 6 Axonal sectional view of a brake assembly provided in an embodiment of this disclosure.

[0024] Explanation of reference numerals in the attached figures: 1. Rotor assembly; 2. Stator assembly; 3. Power cord socket; 4. Power cord; 5. Brake assembly; 6. Brake outlet cover; 7. Bearing; 8. Rear end cover; 9. Encoder assembly; 10. Encoder cover; 11. Integral brake; 12. Gear; 13. Brake wire; 14. Through hole; 15. Large reinforcing rib; 16. Small reinforcing rib; 17. Outlet; 18. Receiving groove; 19. Threaded hole; 20. Mounting threaded hole; 21. Mounting through hole; 22. Assembly hole; 23. Sealing groove; 24. Boss. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0027] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0028] refer to Figures 1-6 The motor provided in this embodiment includes a brake cable outlet cover 6. The brake cable outlet cover 6 has no independent cavity. The brake cable outlet cover 6 includes a sealing groove 23 and a boss 24. A sealing element is adapted to be installed in the sealing groove 23. The boss 24 is distributed on the groove wall of the sealing groove 23. The boss 24 is used to prevent the sealing element from falling out of the sealing groove 23.

[0029] For example, the brake cable outlet cover 6 has no independent cavity, which means that the brake cable outlet cover 6 does not have a dedicated enclosed space for storing the brake cable 13. It is only a thin structure with a basic plane and a partial groove. It does not undertake the function of storing the wire harness. The storage of the brake cable 13 is achieved through the dedicated structure of the motor end cover, such as the receiving groove 18 formed by the end cover and the brake assembly 5 described later. The cable outlet cover only focuses on the sealing function, thereby compressing its own axial dimension.

[0030] For example, a sealing element is adapted to be installed in the sealing groove 23. Adaptive installation means that the width and depth of the sealing groove 23 match the outer diameter and thickness of the sealing element. After the sealing element is embedded in the sealing groove 23, its outer side fits against the groove wall of the sealing groove 23, and its inner side can contact the surface of the end cap described later. The compression of the sealing element can be controlled by the dimensional tolerance between the groove and the sealing element. For example, the thickness of the sealing element in its natural state is slightly greater than the depth of the sealing groove 23, ensuring that the sealing element can tightly fill the gap between the sealing groove 23 and the end cap after assembly, forming an effective seal.

[0031] For example, the boss 24 refers to a small block or strip-shaped structure that protrudes into the sealing groove 23 from the groove wall (such as the groove edge or the inner side wall of the groove). Its height is less than the depth of the sealing groove 23 to avoid interfering with the compression of the seal. The bosses 24 can be evenly spaced along the circumference of the sealing groove 23, or set at key positions similar to the two ends of the groove of the sealing groove 23. The protruding part of the boss 24 can be engaged in the edge of the seal or in the preset groove to prevent the seal from sliding out or shifting from the sealing groove 23 during assembly, transportation or vibration of the motor.

[0032] For example, the motor provided in this embodiment of the present disclosure further includes a stator assembly 2. The brake wire 13 of the brake and the power wire 4 of the stator assembly 2 are welded together and placed in the receiving groove 18 of the structure of the present disclosure. The brake is powered through the power wire socket 3 to the power wire 4 to the brake wire 13. There is a brake between the stator assembly 2 and the receiving groove 18, and the power wire 4 on it needs to pass through the groove of the brake to reach the position of the receiving groove 18. Therefore, in the actual assembly process of the stator assembly 2 in the present disclosure, its connection with the above-mentioned structural components mainly lies in the power wire 4 on it.

[0033] For example, the mounting through hole 21 serves to pass through screws and fix the rear end cover 8. There are four mounting through holes 21, which are distributed circumferentially. The screws are inserted from the end without reinforcing ribs, pass through the mounting through holes 21, and are screwed into the threaded holes of the stator assembly 2 to fix the rear end cover 8 to the stator assembly 2.

[0034] For example, refer to Figure 1 The hole through which the screw at the bottom of the brake passes is one of the three through holes 14. The screw passes through these three through holes 14 and is screwed into the threaded hole 19 on the other side of the rear end cover 8, thus fixing the brake and the rear end cover 8 together.

[0035] In this way, the structure without an independent cavity eliminates the need for existing solutions that require reserved cavity depth to accommodate the wiring harness, significantly reducing the axial height of the outlet cover and effectively minimizing the redundant space occupied at the motor end. This makes the motor more suitable for the integration needs of miniaturized equipment. At the same time, the fitting and matching of the sealing groove 23 and the sealing element can form an effective sealing barrier at the assembly interface between the outlet cover and the end cover, preventing external dust, moisture, and other impurities from entering the motor and avoiding failure of the brake wire 13 and internal components due to environmental factors, thus ensuring the long-term reliability of the motor. In addition, the boss 24 on the wall of the sealing groove 23 prevents the sealing element from falling off through physical limiting. This not only avoids rework caused by the displacement of the sealing element during assembly, thus improving assembly efficiency, but also prevents the sealing element from falling off due to vibration and temperature changes during long-term use, ensuring a continuous and stable sealing effect and reducing maintenance needs and costs.

[0036] Considering the assembly scheme of the brake outlet cover 6 and the end cover, in this embodiment of the present disclosure, the motor includes an end cover, and the brake outlet cover 6 includes an assembly hole 22. The assembly hole 22 is used to pass through a first fastener to assemble and fix the brake outlet cover 6 and the end cover.

[0037] For example, the first fastener passes through the mounting hole 22 of the brake outlet cover 6, which is adapted to the threaded blind hole of the end cover, and is used to fix the outlet cover and the end cover, focusing on sealing and fixing.

[0038] For example, the assembly hole 22 is a circular through hole 14 that penetrates the brake outlet cover 6. The number and position of the hole 22 need to match the corresponding assembly structure of the end cover, such as the threaded blind hole of the end cover. For example, multiple assembly holes 22 are evenly arranged on the edge of the outlet cover. The diameter of the assembly hole 22 is slightly larger than the diameter of the fastener, which allows the fastener to be inserted and screwed into the threaded blind hole of the end cover, thereby fixing the brake outlet cover 6 on the end cover and achieving the dual function of sealing and structural fixation.

[0039] For example, the end cover refers to the motor rear end cover 8 that is directly assembled with the brake outlet cover 6. It has a threaded blind hole in the assembly area corresponding to the brake outlet cover 6. It is not a general motor end cover. The plane of this area of ​​the end cover needs to be kept flat to ensure that a tight fit interface can be formed after assembly with the brake outlet cover 6.

[0040] For example, the assembly hole 22 is a circular through hole 14 that penetrates the thickness direction of the brake outlet cover 6. It is usually evenly distributed along the edge of the brake outlet cover 6. The hole diameter is slightly larger than the rod diameter of the first fastener, which ensures that the first fastener can be smoothly inserted and avoids obvious shaking after insertion. The central axis of the assembly hole 22 is completely coincident with the central axis of the corresponding threaded blind hole of the end cover, so as to ensure that the fastener can be accurately aligned with the threaded blind hole during assembly and avoid assembly jamming or structural damage caused by misalignment.

[0041] For example, the first fastener focuses on sealing and fixing, not simply achieving structural connection, but using the tightening force of the first fastener to make the mating surfaces of the brake outlet cover 6 and the end cover fit tightly together, thereby compressing the seal in the sealing groove 23 and allowing the seal to fully fill the gap between the two. At the same time, the tightening torque of the fastener is controlled within a preset range, which avoids both insufficient torque causing the outlet cover to loosen and insufficient compression of the seal, and excessive torque causing the outlet cover to deform, ensuring a stable and durable sealing effect.

[0042] In this way, through the assembly hole 22 of the end cover and the brake outlet cover 6 and the matching structure of the first fastener, the first fastener passes through the outlet cover assembly hole 22 and adapts to the threaded blind hole of the end cover. This can achieve precise positioning and assembly of the outlet cover and the end cover, ensuring a tight fit between the two assembly interfaces, providing a stable assembly foundation for the sealing element in the sealing groove 23 to function, and avoiding sealing failure due to assembly gaps. At the same time, by focusing on the connection method of sealing and fixing, the displacement or loosening of the outlet cover can be restricted during motor operation and transportation, preventing the sealing element from detaching from the sealing groove 23 or creating gaps due to changes in the position of the outlet cover, continuously blocking external impurities from entering the motor, and ensuring the structural stability of the thin outlet cover without independent cavity during long-term use.

[0043] Considering another function of the brake cable outlet cover 6, in this embodiment of the present disclosure, the motor includes a power line 4, and the height of the brake cable outlet cover 6 is set to not interfere with the reverse cable outlet of the power line 4.

[0044] For example, the power cord 4 is not an isolated cable, but a conductive carrier that can be connected to the power cord socket 3 of the motor through a connector at one end and is used to connect to an external power source at the other end. Its core function is to transmit electrical energy to the motor's brake assembly 5 and other electrical components. The power cord 4 needs to be connected to the brake cord 13, and after connection, it needs to be neatly stored in the receiving groove 18 of the end cover and finally led out through the outlet 17 of the end cover. It is not simply a cable for powering the motor body.

[0045] For example, the height of the brake cable outlet cover 6 refers to the maximum dimension of the brake cable outlet cover 6 protruding outward from the surface of the end cover along the motor axial direction (i.e., the extension direction of the rotor assembly 1 shaft) after it is assembled on the end cover, rather than the radial dimension of the cable outlet cover or the thickness in other directions. This height setting needs to be controlled within a specific range to ensure that it does not exceed the space required for the reverse cable outlet of the power cord 4. For example, its height can be set to not exceed the adaptation distance on the end cover surface to avoid physical contact with the reverse-installed power cord 4 connector or the power cord 4 itself.

[0046] For example, reverse wiring means that the power line 4 is led out in the opposite direction of the motor shaft extension direction, such as the rear end of the motor, consistent with the side where the end cover is located, rather than being led out in the forward direction of the motor shaft extension direction.

[0047] For example, non-interference means that the height of the brake cable outlet cover 6 is low enough so that the power cord 4 connector, which is inserted into the power cord socket 3, can be smoothly installed in the power cord socket 3, and the power cord 4 can extend naturally along the rear end direction after being led out from the connector. The cable outlet cover will not physically obstruct the installation space of the connector or the extension path of the power cord 4, and there is no need to bend the power cord 4 to avoid the cable outlet cover.

[0048] In this way, by setting the height of the brake cable outlet cover 6 to not interfere with the reverse cable outlet of the power cable 4, the problem of the cable outlet cover being too tall and physically obstructing the reverse cable outlet of the power cable 4 in the existing structure is directly solved. This allows the power cable 4 to flexibly choose the forward or reverse cable outlet direction according to the actual installation scenario, greatly improving the adaptability of the motor in different wiring environments. On the other hand, this height setting ensures the space for the reverse cable outlet of the power cable 4 without increasing the overall axial dimension of the motor, continuing the advantage of the compact design of the cable outlet cover, avoiding space waste, and eliminating the need to bend the power cable 4 to accommodate the reverse cable outlet, effectively reducing stress damage to the cable caused by bending, and further ensuring the service life of the power cable 4 and the stability of the motor power supply.

[0049] Considering the structural design of the power cord 4 being able to exit in either the forward or reverse direction, in this embodiment of the disclosure, the motor further includes a power cord socket 3. The power cord socket 3 is configured to accommodate power cord 4 connectors of different structures. The power cord 4 is connected to the power cord socket 3 through the power cord 4 connectors so that the power cord 4 can exit in either the forward or reverse direction.

[0050] In this way, by configuring the power cord socket 3 to accommodate power cord 4 connectors of different structures, the power cord 4 can achieve forward or reverse output by using different connectors and sockets. This completely solves the limitation of the existing power cord 4, which can only output in one direction and is difficult to adapt to various installation and wiring scenarios. The motor can flexibly choose the output direction according to the actual space layout, greatly improving installation adaptability. In addition, there is no need to modify the main structure of the motor or the socket itself. The output direction can be switched simply by changing the connector. The operation is convenient and the adjustment cost is reduced. At the same time, the brake output cover 6 does not interfere with the height setting of the reverse output, ensuring that the power cord 4 can extend smoothly in different output directions and avoiding stress damage caused by cable bending due to direction switching.

[0051] Considering the specific structural scheme of the end cap, in this embodiment of the disclosure, the end cap includes reinforcing ribs, a cable outlet 17, and a receiving groove 18; the reinforcing ribs include a large reinforcing rib 15 and a small reinforcing rib 16, the small reinforcing rib 16 being formed by splitting the large reinforcing rib 15 below the cable outlet 17; the motor includes a brake assembly 5, the brake assembly 5 including a brake wire 13, after the end cap and the brake assembly 5 are assembled, the two small reinforcing ribs 16 and the brake assembly 5 surround to form the receiving groove 18, the receiving groove 18 being used to accommodate the brake wire 13.

[0052] For example, the end cover refers to the rear end cover 8 of the motor, whose core function is to support the rotor assembly 1, the brake assembly 5 and to organize the cables; the reinforcing ribs are distributed around the bearing 7 chamber of the end cover to improve the structural rigidity of the bearing 7 chamber, and are not randomly set.

[0053] For example, the outlet 17 is a strip-shaped or circular opening that runs through the end cap and is located outside the receiving groove 18. It is used to guide the brake wire 13 outward from inside the motor. The opening size is slightly larger than the diameter of the brake wire 13 to avoid cable compression.

[0054] For example, the receiving groove 18 is not a pre-fabricated independent groove of the end cap, but a spatial structure formed by the assembly of the end cap and the brake assembly 5. It has no separate groove wall and depends on the cooperation of the two to form it.

[0055] For example, the large reinforcing rib 15 is the original basic reinforcement structure of the end cap, which is usually evenly distributed along the circumference of the end cap and has a large cross-sectional size, used to improve the overall rigidity of the end cap; while the small reinforcing rib 16 is two independent short ribs formed by cutting and splitting the "single large reinforcing rib 15 corresponding to the outlet 17". After splitting, the cross-sectional size of each small reinforcing rib 16 is the same as that of the large reinforcing rib 15, ensuring that the rigidity is not reduced, and a gap is reserved between the two small reinforcing ribs 16. The gap width is adapted to the requirements of the receiving groove 18, and not all large reinforcing ribs 15 are split.

[0056] For example, the core of the brake assembly 5 includes an integral brake 11, a gear 12 and a brake wire 13, which are assembled into one unit and are not independent components. The brake wire 13 is a flexible copper core cable, one end of which is connected to the internal circuit of the integral brake 11, and the other end needs to be matched with the power line 4. Its length needs to be adapted to the extension path of the receiving groove 18, that is, it extends from the brake assembly 5 to the end cover outlet 17. It is not a random cable used simply to connect to the external circuit.

[0057] For example, after the integral brake 11 of the brake assembly 5 is fixed to the threaded hole 19 of the end cap reinforcing rib 15 by fasteners, the side of the integral brake 11 abuts against the inner side of the two small reinforcing ribs 16 of the end cap. At this time, the two small reinforcing ribs 16 on the left and right sides, the side (inner side) of the integral brake 11 and the plane (bottom) of the end cap together form a receiving groove 18. The groove width is slightly larger than the diameter of the brake wire 13, and the groove length extends from the integral brake 11 to the end cap outlet 17, which can just embed the brake wire 13 into it, realizing the neat placement of the cable. It is not a groove that is separately processed by the end cap.

[0058] In this way, by splitting the large reinforcing rib 15 below the cable outlet 17 into small reinforcing ribs 16, the end cover, together with the brake assembly 5, forms a receiving groove 18 to accommodate the brake wire 13. This eliminates the need for an additional independent cable-accommodating structure on the end cover or the brake cable outlet cover 6, making full use of the unused space of the original reinforcing rib layout of the end cover and avoiding redundant structures occupying internal space of the motor. At the same time, the split large and small reinforcing ribs 16 can still effectively maintain the structural rigidity of the end cover, especially supporting the stability of the end cover bearing 7 chamber, ensuring the structural reliability of the motor during operation. In addition, the dedicated receiving groove 18 provides a neat and suitable storage space for the brake wire 13, avoiding damage caused by the brake wire 13 being squeezed and rubbed against other components due to the lack of a fixed receiving area, extending the service life of the brake wire 13. Furthermore, the position of the receiving groove 18 is adapted to the end cover cable outlet 17, which can guide the brake wire 13 to be smoothly led out, further optimizing the internal wiring order of the motor and reducing the risk of failure caused by messy cables.

[0059] Considering the assembly structure of the integral brake 11 and the rotor assembly 1, in this embodiment of the present disclosure, the motor further includes the rotor assembly 1, and the brake assembly 5 further includes the integral brake 11 and the gear 12; the gear 12 is press-fitted onto the rear end of the rotor assembly 1, the integral brake 11 is sleeved on the shaft of the rotor assembly 1, and the integral brake 11 and the gear 12 are assembled and fitted together, and the integral brake 11 is positioned and assembled through the gear 12 and the shaft of the rotor assembly 1.

[0060] For example, the rotor assembly 1 is the core moving part of the motor to realize power output. It is mainly composed of a rotor shaft, a rotor core and a permanent magnet embedded in the core. Bearings 7 can be installed at both ends of the shaft to realize rotational support. The rear end refers to the side of the rotor assembly 1 away from the motor power output end. This side shaft has a specific shaft section reserved for the assembly of the gear 12 and the integral brake 11. It is not the general term "motor rear end".

[0061] For example, the integral brake 11 is the core component for realizing the motor braking function. It integrates a brake coil, friction pads and a return spring. When the power is on, the brake is released, and when the power is off, the brake is achieved by the friction pads adhering to the brake. The gear 12 is not a conventional transmission gear 12 of the motor, but an adapter component specially designed for positioning the integral brake 11. Its outer diameter matches the inner hole or end face structure of the integral brake 11, and the material of the gear 12 must meet the positioning stiffness requirements. Together with the integral brake 11, it forms the positioning basis of the brake assembly 5.

[0062] For example, press fitting refers to applying a preset pressure with a press to press the gear 12 into a preset shaft section at the rear end of the rotor shaft body with an interference fit. After assembly, the gear 12 and the rotor shaft body do not rotate relative to each other, and the end face of the gear 12 fits against the shoulder of the rear end of the shaft body, ensuring that the axial position is fixed. It is not an assembly method that uses bolts or keys for connection.

[0063] For example, the integral brake 11 is fitted onto the rotor shaft through a through hole 14 reserved in its center in a transition fit manner. The fitting position is located on the side of the gear 12 away from the rotor core, and the central axis of the integral brake 11 is completely coincident with the axis of the rotor shaft to ensure no eccentricity during rotation.

[0064] For example, the assembly and cooperation of the integral brake 11 and the gear 12 is not a gear meshing cooperation, but a structural adaptation and fit. The end face of the integral brake 11 facing the gear 12 is provided with an annular positioning groove, and the end face of the gear 12 facing the integral brake 11 is provided with a corresponding annular positioning boss 24. The boss 24 is embedded in the positioning groove to achieve radial auxiliary positioning of the two. At the same time, the end faces of the two are tightly fitted to form an axial force-bearing surface, which provides a basis for subsequent axial positioning and avoids relative displacement between the integral brake 11 and the gear 12.

[0065] For example, the integral brake 11 is assembled and positioned by the gear 12 and the shaft of the rotor assembly 1, which is a dual positioning structure. The rotor shaft is radially positioned by cooperating with the center hole of the integral brake 11, which limits the displacement of the integral brake 11 in the direction perpendicular to the shaft axis. The gear 12 is axially positioned by fitting with the end face of the integral brake 11 and the boss 24-groove, which prevents the integral brake 11 from moving along the shaft axis toward the rotor core. The integral brake 11 can be accurately fixed without the need for additional positioning pins, snap rings or other components.

[0066] In this way, by pressing the gear 12 onto the rear end of the rotor assembly 1 and fitting the integral brake 11 onto the shaft of the rotor assembly 1 and assembling it with the gear 12, the integral brake 11 achieves dual positioning by utilizing the radial limiting of the rotor shaft and the axial blocking of the gear 12. This significantly improves the assembly accuracy of the integral brake 11, effectively preventing radial offset or axial movement during motor operation, especially during the vibration state generated during braking, thus ensuring stable and reliable braking function. Furthermore, it eliminates the need for additional positioning pins, positioning rings, or other auxiliary positioning components, simplifying the assembly structure of the brake assembly 5 and the rotor assembly 1, reducing the number of parts and assembly steps, and lowering production and assembly costs. At the same time, this assembly method fully utilizes the shaft and gear 12 structure of the rotor assembly 1 itself, without occupying additional internal space of the motor. It is compatible with the compact design of the brake outlet cover 6 and the space optimization of the end cover receiving groove 18, further enhancing the compactness of the overall motor structure and better adapting to the integration requirements of miniaturized equipment.

[0067] Considering the assembly structure of the integral brake 11 and the end cap, in this embodiment of the present disclosure, the integral brake 11 has a plurality of through holes 14, each of the through holes 14 being evenly distributed along the circumference of the integral brake 11. The through holes 14 are used to pass through the second fastener. The large reinforcing rib 15 of the end cap is provided with a threaded hole 19. The integral brake 11 is assembled and fixed with the threaded hole 19 by the second fastener.

[0068] For example, the second fastener passes through the through hole 14 of the integral brake 11 and is adapted to the threaded hole 19 of the end cap for fixing the brake assembly 5 and the end cap, emphasizing a rigid transmission connection.

[0069] In this way, the integral brake 11 is fitted with a second fastener through the circumferentially evenly distributed through holes 14, and is assembled and fixed with the threaded holes 19 on the end cover's large reinforcing rib 15. The evenly distributed through holes 14 allow the fastening force applied by the second fastener to be evenly transmitted along the circumference of the integral brake 11, ensuring that the integral brake 11 fits tightly with the end cover, effectively offsetting the vibration and impact force generated during motor braking, preventing the integral brake 11 from becoming loose or misaligned, and ensuring the continuous and stable braking function. In addition, the end cover's large reinforcing rib 15 itself has high structural rigidity, and the threaded holes 19 are set... This significantly enhances the connection strength of the second fastener, preventing the end cap from deforming under stress. It also eliminates the need for an additional independent mounting structure on the end cap, fully utilizing the existing layout of the reinforcing ribs for assembly and fixation. Furthermore, this assembly method only requires precise alignment of the fastener with the threaded hole 19 to complete the fixation, eliminating the need for complex auxiliary positioning components. This simplifies the assembly process of the integral brake 11 and the end cap, improving production efficiency. Moreover, it complements the positioning structure of the integral brake 11 via the rotor shaft and gear 12, further enhancing the assembly stability of the integral brake 11.

[0070] Considering the assembly structure of the rotor assembly 1, the integral brake 11, and the brake assembly 5, in this embodiment of the present disclosure, bearings 7 are mounted at both the front and rear ends of the shaft of the rotor assembly 1. The bearing 7 located at the rear end of the shaft abuts against the side of the integral brake 11 away from the gear 12. The bearing 7 at the rear end is used to fix the brake assembly 5 to the shaft of the rotor assembly 1.

[0071] For example, the "front and rear ends" of the shaft of rotor assembly 1 are defined based on the power output direction of the motor. The front end refers to the end of the shaft of rotor assembly 1 used to connect to the external load and realize power output; the rear end refers to the end of the shaft away from the load and close to the brake assembly 5. Both ends of the shaft are reserved with stepped shaft sections to adapt to the inner ring assembly of bearing 7. The diameter of the shaft section is precisely matched with the inner ring size of the corresponding bearing 7 to ensure that the bearing 7 is stably assembled.

[0072] For example, bearing 7 refers to rolling bearing 7 used to support the rotation of rotor assembly 1. Its outer ring is usually fixed with bearing 7 chamber of motor housing or end cover, and its inner ring is interference fit with rotor shaft. The front bearing 7 only undertakes the basic function of supporting rotor rotation and reducing rotational friction, while the rear bearing 7, in addition to this basic function, also undertakes the function of axial limit brake assembly 5, and is not a normal single-function bearing 7.

[0073] For example, the bearing 7 located at the rear end of the shaft abuts against the side of the integral brake 11 away from the gear 12. Here, abutting means that the inner ring end face of the rear bearing 7 (or the cage end face of the bearing 7) is tightly fitted with the end face of the integral brake 11. During assembly, a slight preload is applied through the shaft step or the bearing 7 press-fitting process to ensure that the two are in contact without gaps. In addition, "the side of the integral brake 11 away from the gear 12" can be clarified in conjunction with the assembly relationship. When the integral brake 11 is sleeved on the shaft, one end face of it is fitted with the end face of the gear 12. The gear 12 is located on the side of the integral brake 11 near the rotor core, and the other end face faces the rear end of the shaft. The rear bearing 7 is assembled on this side and abuts against the end face, forming an axial arrangement of gear 12-integral brake 11-rear bearing 7.

[0074] For example, the rear bearing 7 is used to fix the brake assembly 5 to the shaft of the rotor assembly 1. This "fixation" does not rely solely on the rear bearing 7, but rather on the "bidirectional axial limiting" fit formed by the rear bearing 7 and the gear 12. The gear 12 is fixed to the rear end of the shaft by press fitting, preventing the integral brake 11 from moving towards the rotor core. The rear bearing 7, by abutting against the integral brake 11, prevents it from moving towards the rear end of the shaft. Together, they restrict the movement of the brake assembly 5 along the axial direction of the shaft. At the same time, the integral brake 11 achieves radial positioning through the transition fit between the central hole and the shaft, ultimately forming a complete fixation of axial limiting + radial positioning, ensuring that the brake assembly 5 has no displacement or shaking on the shaft.

[0075] In this way, the bearings 7 mounted at the front and rear ends of the rotor assembly 1 shaft provide stable support for rotor rotation. The rear bearing 7 also abuts against the side of the integrated brake 11 furthest from the gear 12, forming a bidirectional axial limit on the brake assembly 5 with the gear 12. This effectively prevents the brake assembly 5 from moving axially along the shaft, ensuring it maintains a precise assembly position during motor operation and braking. This avoids positional deviations affecting braking friction contact accuracy and ensures reliable braking function. Simultaneously, this design reuses the rear bearing 7 already present on the rotor shaft to fix the brake assembly 5, eliminating the need for additional auxiliary fixing components such as snap rings or positioning rings. This simplifies the assembly structure, reduces the number of parts and assembly steps, lowers production and maintenance costs, and avoids additional components occupying internal motor space. This aligns with the compact assembly of the integrated brake 11, the space optimization of the end cover receiving groove 18, and the thin design of the brake outlet cover 6, further enhancing the overall compactness of the motor structure. Furthermore, the rigid contact of the bearing 7 can buffer the axial impact force generated during braking, reducing vibration friction between the brake assembly 5 and the shaft, extending component lifespan, and improving the smoothness of motor operation.

[0076] Considering the association scheme of the large reinforcing rib 15 and the small reinforcing rib 16 with the integral brake 11, in this embodiment of the disclosure, there are multiple large reinforcing ribs 15, and each large reinforcing rib 15 is distributed along the circumference of the end cover; both the large reinforcing rib 15 and the small reinforcing rib 16 are in direct contact with the integral brake 11, and the large reinforcing rib 15 and the small reinforcing rib 16 are used to improve the structural rigidity and stability of the bearing 7 chamber of the end cover.

[0077] In this way, multiple large reinforcing ribs 15 are distributed circumferentially along the end cover, which can evenly distribute the force on the end cover and avoid structural deformation caused by local stress concentration. At the same time, both the large reinforcing ribs 15 and the small reinforcing ribs 16 are in direct contact with the integral brake 11, and can form bidirectional support with the rigid structure of the integral brake 11. This not only strengthens the overall structural stability of the end cover, but also specifically improves the rigidity of the bearing 7 chamber. As the core area supporting the rotation of the rotor assembly 1, the increased rigidity of the bearing 7 chamber can effectively reduce the radial wobble during rotor operation, ensure the rotational accuracy of the motor, and prevent the bearing 7 chamber from affecting the fitting accuracy between the bearing 7 and the shaft due to deformation. In addition, this setting does not require the addition of an independent reinforcing structure to the end cover. It makes full use of the existing assembly relationship between the reinforcing ribs and the brake assembly 5 to achieve rigidity optimization, without occupying the internal space of the motor, which meets the requirements of the overall compact design of the motor. Moreover, the contact between the reinforcing ribs and the brake can also disperse the impact force generated during braking, reduce local damage to the end cover, and further extend the service life of the end cover.

[0078] Considering the assembly structure of the power line 4 and the brake line 13, in this embodiment of the present disclosure, the connection part of the power line 4 and the brake line 13 is provided with an insulating protective structure. The insulating protective structure includes insulating tape and heat shrink tubing. The insulating tape is wrapped around the outside of the connection part, and the heat shrink tubing is sleeved on the outside of the insulating tape. After being heated, the heat shrink tubing is tightly shrunk and adhered to the surface of the insulating tape.

[0079] For example, the connection point between the power cord 4 and the brake cord 13 refers to the core area where the power cord 4 and the brake cord 13 achieve a conductive connection, not the complete overlapping section of the two cables. It usually includes the butt joint of the two cable conductors and the exposed conductor area near the joint. This area needs to be protected to avoid leakage. For example, if a welding connection is used, the connection point includes the metal weld formed by welding, as well as the conductor section on both sides of the weld that is not covered by the insulation layer, and does not refer only to the weld itself.

[0080] For example, insulating tape is wrapped around the outside of the connection part. The insulating tape refers to special tape that meets electrical insulation standards, not ordinary packaging tape. The wrapping must meet the requirements of full coverage and no gaps. It needs to be wrapped around the connection part, and the wrapping range must exceed the matching distance at both ends of the connection part to ensure that the connection part and the exposed conductors nearby are completely covered by the tape. After wrapping, the tape layer is wrinkle-free and loose, which initially blocks the contact between the conductor and the outside world.

[0081] For example, heat shrink tubing is a tubular insulating component with heat shrink properties, usually made of polyolefin material. Its initial inner diameter needs to be slightly larger than the diameter of the cylinder formed after the insulating tape is wrapped, to ensure that it can be smoothly fitted onto the outside of the tape. When fitting, the heat shrink tubing should completely cover the area wrapped with the insulating tape, and both ends should extend beyond the edge of the tape by a suitable distance to reserve space for subsequent sealing.

[0082] In this way, the insulation protection structure of the connection between the power cord 4 and the brake cord 13 adopts a double-layer protection setting of insulating tape and heat shrink tubing. The insulating tape tightly wraps the connection part to achieve initial insulation isolation, avoiding the risk of leakage and short circuit caused by exposed connection parts. At the same time, the heat shrink tubing, after being heated and tightly attached, forms a secondary sealing barrier, effectively blocking the intrusion of external dust and moisture, preventing poor contact caused by oxidation and moisture at the connection part. At the same time, the shrinking characteristics of the heat shrink tubing can also enhance the structural stability of the connection part and reduce the impact of motor vibration on the cable connection. In addition, this double-layer protection structure does not require much additional space inside the motor, and is compatible with the neat cable arrangement of the end cover receiving slot 18 and the compact layout of the brake outlet cover 6. While ensuring insulation safety and connection reliability, it does not compromise the overall space optimization effect of the motor, further extending the service life of the power cord 4 and the brake cord 13, and reducing the probability of motor repair due to cable connection failure.

[0083] Considering another structural scheme of the motor, in this embodiment of the present disclosure, the motor further includes an encoder assembly 9 and an encoder cover 10; the encoder assembly 9 is mounted on the side of the end cover away from the brake assembly 5, and the encoder cover 10 covers the outside of the encoder assembly 9, and the encoder cover 10 is used to protect the encoder assembly 9.

[0084] For example, the end cap, i.e., the rear end cap 8, has mounting threaded holes 20 for assembling an encoder. That is, when assembling an encoder on the end face of the rear end cap 8 without reinforcing ribs, screws are needed to secure the encoder; therefore, mounting threaded holes 20 are provided. In this embodiment of the disclosure, there are two mounting threaded holes 20, one of which is... Figure 3 The location shown is another one with Figure 3 The positions shown are located within the same diameter circle, distributed at 180° intervals, where the encoder screws are... Figure 1 This is also reflected in encoder component 9.

[0085] In this way, the encoder assembly 9 is mounted on the side of the end cover away from the brake assembly 5. This not only makes reasonable use of the non-brake assembly space of the end cover, avoiding spatial conflicts between the encoder assembly 9 and the brake assembly 5, cable outlet cover, and other structures in the axial or radial direction of the motor, but also works in synergy with the thin design of the brake cable outlet cover 6 and the space optimization of the end cover receiving groove 18 to maintain the compactness of the overall motor structure. Furthermore, the encoder cover 10 covers the outside of the encoder assembly 9, forming a physical protective barrier. This not only prevents external dust, moisture, and other impurities from entering the encoder assembly 9, avoiding the failure of its optical or electronic components due to contamination, ensuring the accuracy of the encoder in detecting motor speed and rotor position, and thus ensuring motor control precision, but also buffers minor external mechanical impacts to prevent damage to the encoder assembly 9 due to collisions. At the same time, this assembly layout places the encoder assembly 9 and the brake assembly 5 on opposite sides of the end cover, with their respective assembly processes not interfering with each other, simplifying the overall motor assembly process and improving production efficiency.

[0086] Considering a further limiting scheme for the sealing groove 23 and the seal on the brake outlet cover 6, in this embodiment of the disclosure, a dimensional tolerance is provided between the sealing groove 23 and the seal. The dimensional tolerance is configured to adjust the compression ratio of the seal and the groove fill factor of the sealing groove 23 to ensure the sealing reliability between the brake outlet cover 6 and the end cover.

[0087] In this way, by setting dimensional tolerances between the sealing groove 23 of the brake outlet cover 6 and the sealing element, the motor can precisely adjust the compression ratio of the sealing element and the groove fill factor of the sealing groove 23. A reasonable compression ratio can prevent the sealing element from creating a sealing gap due to insufficient compression, or from permanent deformation or elastic failure due to excessive compression, ensuring that the sealing element maintains effective sealing performance for a long time. The appropriate groove fill factor allows the sealing element to completely fill the space of the sealing groove 23, without local gaps or protrusions, further eliminating weak sealing areas. This setting does not require additional sealing auxiliary structures. While maintaining the thin and compact design of the brake outlet cover 6, it effectively prevents external dust, moisture and other impurities from entering the motor through the assembly interface between the outlet cover and the end cover, avoiding damage to core components such as the brake wire 13 and rotor assembly 1 due to environmental factors.

[0088] This disclosure also provides an air conditioner that includes the aforementioned motor, which can achieve all the technical effects of the motor, and will not be described in detail here.

[0089] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0090] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0091] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric motor, characterized in that, The device includes a brake cable outlet cover, which has no independent cavity. The brake cable outlet cover includes a sealing groove and a boss. A sealing element is adapted to be installed in the sealing groove. The boss is distributed on the groove wall of the sealing groove and is used to prevent the sealing element from falling out of the sealing groove.

2. The motor according to claim 1, characterized in that, The motor includes an end cover, and the brake outlet cover includes an assembly hole for inserting a first fastener to assemble and fix the brake outlet cover to the end cover.

3. The motor according to claim 2, characterized in that, The motor includes a power cord, and the height of the brake outlet cover is set so as not to interfere with the reverse outlet of the power cord.

4. The motor according to claim 3, characterized in that, The motor also includes a power cord socket, which is configured to accommodate power cord connectors of different structures. The power cord is connected to the power cord socket through the power cord connectors so that the power cord can exit in either the forward or reverse direction.

5. The motor according to claim 3, characterized in that, The end cap includes reinforcing ribs, a cable outlet, and a receiving groove; the reinforcing ribs include large reinforcing ribs and small reinforcing ribs, and the small reinforcing ribs are formed by splitting the large reinforcing ribs below the cable outlet; the motor includes a brake assembly, the brake assembly includes a brake wire, and after the end cap is assembled with the brake assembly, the two small reinforcing ribs and the brake assembly surround and form the receiving groove, which is used to accommodate the brake wire.

6. The motor according to claim 5, characterized in that, The motor also includes a rotor assembly, and the brake assembly includes an integral brake and a gear; the gear is press-fitted to the rear end of the rotor assembly, the integral brake is sleeved on the shaft of the rotor assembly, and the integral brake is assembled and cooperated with the gear, and the integral brake is positioned and assembled through the gear and the shaft of the rotor assembly.

7. The motor according to claim 6, characterized in that, The integral brake has multiple through holes, each of which is distributed circumferentially along the integral brake. The through holes are used to pass through a second fastener. The large reinforcing rib of the end cap is provided with a threaded hole. The integral brake is assembled and fixed to the threaded hole by the second fastener.

8. The motor according to claim 6, characterized in that, Bearings are mounted at both ends of the rotor assembly shaft. The bearing at the rear end of the shaft abuts against the side of the integral brake away from the gear. The bearing at the rear end is used to fix the brake assembly to the shaft of the rotor assembly.

9. The motor according to claim 6, characterized in that, The large reinforcing ribs are multiple, and each large reinforcing rib is distributed along the circumference of the end cap; both the large reinforcing ribs and the small reinforcing ribs are in direct contact with the integral brake.

10. The motor according to claim 9, characterized in that, The connection between the power cord and the brake cord is provided with an insulating protective structure, which includes insulating tape and heat shrink tubing. The insulating tape is wrapped around the outside of the connection, and the heat shrink tubing is sleeved on the outside of the insulating tape. The heat shrink tubing is heated and then tightly pressed against the surface of the insulating tape.

11. The motor according to claim 9, characterized in that, The motor also includes an encoder assembly and an encoder cover; the encoder assembly is mounted on the side of the end cover away from the brake assembly, and the encoder cover is fitted over the outside of the encoder assembly to protect the encoder assembly.

12. The motor according to claim 1, characterized in that, A dimensional tolerance is provided between the sealing groove and the sealing element, and the dimensional tolerance is configured to adjust the compression ratio of the sealing element and the fill factor of the sealing groove.

13. An air conditioner comprising a motor as claimed in any one of claims 1-12.

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