A plug connector and motor assembly

Abstract

The utility model relates to a plug connector and motor assembly in the motor technical field, this plug connector includes first connecting part and second connecting part, first connecting part is designed as along the first direction extension, second connecting part along second direction extension, second direction and first direction intersect, first connecting part is provided with first connecting structure, second connecting part is provided with the second connecting structure that cooperates with first connecting structure, and second connecting part is detachable with first connecting structure through second connecting structure and connects. The plug connector is simplified with the shell assembly, improves production efficiency, can also avoid the dead angle space formed at the connecting place of first connecting part and the shell, thereby facilitating the setting flat washer between the threaded hole and screw on the shell to improve the air tightness between first connecting part and motor shell.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a plug connector and motor assembly. Background Technology

[0002] In recent years, with the continuous development of industries such as industrial robots and non-standard automated equipment, the servo motor market has maintained a sustained growth trend, and its application areas are becoming increasingly widespread. The special operating environment of servo motors requires high protection performance from the motor body itself, which necessitates high protection performance from the sealing structure and corresponding sealing elements between various parts of the motor body. Currently, the right-angle plug of the servo motor is locked to the housing with screws. Due to interference between the screwdriver and the threaded hole in the housing, a flat washer cannot be placed between the locking screw and the housing threaded hole, resulting in frequent air leakage at the right-angle plug locking screw during overall airtightness testing, making it difficult to meet requirements. Utility Model Content

[0003] The technical problem this invention aims to solve is that in the prior art, the right-angle plug of the servo motor is locked to the housing with screws. Because of interference between the screwdriver and the threaded hole in the housing, a flat washer cannot be placed between the locking screw and the right-angle plug, resulting in frequent air leakage at the locking screw location during overall airtightness testing, making it difficult to meet requirements. This invention provides a plug connector and a motor assembly.

[0004] This utility model aims to provide a plug connector, comprising: The first connecting portion includes a base, the base having a first end face and a second end face disposed opposite to each other along a first direction, the first connecting portion further includes a base extending from the second end face along the first direction, the base being provided with a mounting hole located on the periphery of the base, the first end face being used to fit against the surface of the motor housing, and the mounting hole being used for a connector to pass through to fix the first connecting portion onto the housing. The second connecting part extends along a second direction, which intersects with the first direction. A first connecting structure is provided at the end of the base away from the first end face. A second connecting structure that cooperates with the first connecting structure is provided on the second connecting part. The second connecting part is detachably connected to the first connecting part through the second connecting structure and the first connecting structure.

[0005] In some embodiments, the second direction is perpendicular to the first direction, and the second connecting structure is disposed on the second connecting portion along the first direction.

[0006] In some embodiments, the second connection structure includes an external thread, the first connection structure includes an internal thread, the internal thread is adapted to the external thread, and the second connection portion is screwed into the inner side of the first connection portion by the cooperation of the external thread and the internal thread; Alternatively, the second connection structure includes an internal thread, and the first connection structure includes an external thread. The internal thread is adapted to the external thread, and the second connection part is fitted onto the outside of the first connection part by the cooperation of the internal thread and the external thread.

[0007] In some embodiments, the second connection structure further includes a protrusion located below the external thread, the protrusion protruding toward the central axis of the base, and the first connection structure further includes a groove located below the internal thread, the groove corresponding to the protrusion one by one, the second connection part being screwed into the inner side of the first connection part by the external thread and the internal thread engaging until the protrusion is engaged in the corresponding groove; Alternatively, the second connecting structure may further include a groove located on the lower side of the internal thread, and the first connecting structure may further include a protrusion located on the lower side of the external thread. The protrusion protrudes outward toward the outer side of the base, and the groove corresponds one-to-one with the protrusion. The second connecting part is fitted onto the outer side of the first connecting part by the internal thread and the external thread until the protrusion is engaged in the corresponding groove.

[0008] In some embodiments, multiple protrusions are provided, and multiple slots are provided; The protrusions are distributed at equal intervals, and the slots are distributed at equal intervals.

[0009] In some embodiments, the first connecting portion further includes a positioning boss disposed on the first end face, the positioning boss being used to engage with the cable outlet hole of the housing.

[0010] In some embodiments, a flexible wire-fixing piece is provided at the bottom end of the positioning boss, and a wire-passing groove is provided on the flexible wire-fixing piece.

[0011] In some embodiments, the first connecting portion has a first wiring hole extending along the first direction, and the second connecting portion has a second wiring hole extending along the second direction, wherein the first wiring hole and the second wiring hole are in communication.

[0012] In some embodiments, a motor assembly is provided, comprising: Electric motor; The aforementioned plug connector; The motor is located inside the housing. A cable outlet hole is provided on the side wall of the housing. A threaded hole is provided around the cable outlet hole on the housing. The mounting hole of the base of the first connecting part is connected to the threaded hole by a screw. The power cord of the motor passes through the cable outlet hole from inside the housing and enters the plug connector, and is electrically connected to the pins of the plug connector.

[0013] In some embodiments, a sealing gasket is provided at the mounting hole and / or the threaded hole.

[0014] In some embodiments, the positioning boss of the plug connector passes through the cable outlet hole to the first end face of the first connection portion and fits against the surface of the housing.

[0015] The solution provided by this utility model has the following advantages compared with the prior art: By continuously passing screws or other connectors through the mounting holes and corresponding threaded holes on the motor housing surface, a fixed connection is established between the first connecting part and the motor housing. After the first connecting part is connected to the housing, the second connecting structure of the second connecting part is connected to the first connecting structure of the first connecting part, thus completing the assembly of the plug connector. During the installation of the plug connector on the motor, interference between installation tools such as screwdrivers and the second connecting part of the plug connector is avoided, and the installation process is simplified, improving installation efficiency. Attached Figure Description

[0016] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of two parts of a conventional plug connector; Figure 2 This is a schematic diagram showing the plug connector assembled on a motor according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the first connecting portion shown in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the second connecting portion shown in an embodiment of the present invention; Figure 5 This is a bottom view of the second connecting part shown in an embodiment of the present invention; Figure 6 This is a side view of the second connecting portion shown in an embodiment of the present invention; Figure 7 This is a top view of the first connecting part shown in an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of the casing shown in an embodiment of the present invention; Figure 9 This is a top view of the first connecting part being assembled on the housing, as shown in an embodiment of this utility model.

[0018] In the figure: 1-First connecting part, 101-Slot, 103-Base, 1031-First end face, 1032-Second end face, 1033-Base, 1034-Mounting hole, 104-Positioning boss, 105-First wiring hole, 2-Second connecting part, 202-Second connecting structure, 2021-Protrusion, 203-Second wiring hole, 3-Housing, 301-Outlet hole, 302-Power cord, 5-Flexible cable fixing piece.

[0019] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Currently, the right-angle plug of the servo motor is locked to the housing with screws. Due to the interference between the screwdriver and the right-angle plug, a flat washer cannot be placed between the locking screw and the threaded hole of the housing. As a result, the screw on the right-angle plug often leaks air during the airtightness test of the whole machine, making it difficult to meet the requirements.

[0023] Based on this, the following embodiments are proposed.

[0024] Example 1: like Figure 1The diagram shows a plug connector in the related technology. The plug connector consists of two parts, 1' and 2'. 1' is right-angled and is locked to the housing of the servo motor by screws. Due to the interference between the screwdriver and the right-angle plug 1', the screwdriver and the housing threaded hole are difficult to assemble and cannot accommodate flat washers. With this installation method, the screw on the right-angle plug often leaks air during the airtightness test of the whole machine, making it difficult to meet the requirements. In addition, the two parts of the right-angle plug are fastened together by screws, but the holes of the two parts of the right-angle plug are difficult to align during installation, and the threads are prone to stripping.

[0025] like Figure 2-4 As shown, this embodiment provides a plug connector, including: a first connecting portion 1, including a base 103, the base 103 having a first end face 1031 and a second end face 1032 disposed opposite to each other along a first direction; the first connecting portion 1 further includes a base 1033 extending from the second end face 1032 along the first direction; the base 1033 is provided with a mounting hole 1034, the mounting hole 1034 being located on the periphery of the base 1033; the first end face 1031 is used to fit against the surface of the motor housing 3; the mounting hole 1034 is used for... A connector, such as a screw, passes through to fix the first connecting part 1 to the housing 3; the second connecting part 2 extends along a second direction that intersects the first direction; a first connecting structure is provided at the end of the base 1033 away from the first end face 1031; a second connecting structure 202 that cooperates with the first connecting structure is provided on the second connecting part 2; the second connecting part 2 is detachably connected to the first connecting part 1 through the second connecting structure 202 and the first connecting structure.

[0026] In this embodiment, before assembling the plug connector to the motor, the second connecting structure 202 is first separated from the first connecting structure, thereby separating the second connecting part from the first connecting part. The first connecting part 1 is then connected to the motor housing 3. This can be achieved by continuously passing screws through the mounting hole 1034 and the threaded hole corresponding to the surface of the motor housing 3, thus completing the fixed connection between the first connecting part 1 and the motor housing 3. After the first connecting part 1 and the housing 3 are connected, the second connecting structure 202 of the second connecting part 2 is connected to the first connecting structure of the first connecting part 1, thereby completing the assembly of the plug connector. Therefore, the technical solution of this disclosure avoids interference between installation tools such as screwdrivers and the second connecting part of the plug connector during the installation of the plug connector to the motor, simplifies the installation process, and improves installation efficiency.

[0027] The power cable 302 inside the motor passes sequentially through the housing 3, the first connecting part 1, and the second connecting part 2, and is electrically connected to the pins in the second connecting part 2. The angle between the second connecting structure 202 of the second connecting part 2 and the second direction can be 90° or other angles, as long as it does not interfere with or obstruct the assembly between the second connecting part 2 and the first connecting part 1. Since the first connecting part 1 is a vertical structure with the base 1033 extending along the first direction, for example, the base 1033 is a vertical structure extending perpendicular to the axis of the motor, no dead space is formed around the first connecting part 1. The first connecting part 1 and the housing 3 can be connected by a screw and a screw hole. When a screwdriver is used to control the screw rotation, neither the screwdriver nor the screw will interfere with the first connecting part 1, making assembly convenient. The diameter of the screw hole can also be enlarged, and a flat washer for sealing can be set in the screw hole on the housing 3 to improve the airtightness between the first connecting part 1 and the motor housing 3. By assembling the plug connector with the first connecting part 1 having a base 1033 extending in the first direction and the second connecting part 2 having a second connecting structure 202 with the housing 3, the installation process between the plug connector and the housing 3 is simplified, production efficiency is improved, and dead space is avoided at the connection between the first connecting part 1 and the housing 3. This makes it easier to set a flat washer between the threaded hole and the screw on the housing 3, thereby improving the airtightness between the first connecting part 1 and the motor housing 3.

[0028] Preferably, the second direction is perpendicular to the first direction, and the second connecting structure 202 is disposed on the second connecting portion 2 along the first direction. For example... Figure 2 As shown, the second connecting structure 202 is perpendicular to the overall extension direction of the second connecting part 2 and consistent with the overall extension direction of the first connecting part. The assembly direction of the second connecting structure is consistent with that of the first connecting structure on the first connecting part 1, which further increases the assembly convenience between the first connecting part 1 and the second connecting part 2.

[0029] Optionally, such as Figure 2 , 4 As shown in Figure 6, in one implementation of this embodiment, one of the second connection structure and the first connection structure can be an external thread and the other can be an internal thread, with the external thread and the internal thread being compatible.

[0030] In one embodiment, the second connecting structure includes an external thread, and the first connecting structure includes an internal thread. The internal thread is adapted to the external thread, and the second connecting part 2 is screwed into the inner side of the first connecting part 1 by the cooperation of the external thread and the internal thread, so that the internal thread of the first connecting structure and the external thread of the second connecting structure 202 engage together, thereby achieving a threaded connection between the first connecting structure and the second connecting structure 202. Alternatively, the second connecting structure may include an internal thread, and the first connecting structure may include an external thread. The internal thread is adapted to the external thread, and the second connecting part 2 is fitted onto the outer side of the first connecting part 1 by the cooperation of the internal thread and the external thread, so that the internal thread of the second connecting structure 202 engages with the external thread of the first connecting structure, thereby achieving a threaded connection between the first connecting structure and the second connecting structure 202.

[0031] In this embodiment, when the second connecting structure 202 includes an external thread and the first connecting structure includes an internal thread, the bottom of the second connecting structure 202 is inserted into the upper part of the first connecting structure so that the internal thread and the external thread correspond. Then, the second connecting structure 202 is rotated so that the internal thread and the external thread engage together until the second connecting structure 202 is tightened onto the first connecting structure, thereby completing the threaded connection between the first connecting part 1 and the second connecting part 2. When the second connecting structure 202 includes an internal thread and the first connecting structure includes an external thread, the upper part of the first connecting structure is inserted into the bottom of the second connecting structure 202 so that the internal thread and the external thread correspond. Then, the second connecting structure 202 is rotated so that the internal thread and the external thread engage together until the second connecting structure 202 is tightened onto the first connecting structure, thereby completing the threaded connection between the first connecting part 1 and the second connecting part 2. The first connecting part 1 and the second connecting part 2 are connected by threads, which eliminates the need for additional connecting holes and connecting parts. This reduces the number of connecting steps and connecting parts while ensuring the connection strength between the two, thereby improving the connection efficiency between the first connecting part 1 and the second connecting part 2.

[0032] By using the threaded connection between the first connecting structure and the second connecting part 2, the connection strength between the two can be guaranteed while reducing the number of connecting parts and connecting processes, thereby improving the connection efficiency between the first connecting structure and the second connecting part 2.

[0033] Optionally, such as Figure 4-7 As shown, in one implementation of this embodiment, The second connecting structure further includes a protrusion 2021 located on the lower side of the external thread, the protrusion 2021 protruding towards the central axis of the base 1033. The first connecting structure further includes a groove 101 located on the lower side of the internal thread, the groove 101 corresponding to the protrusion 2021. The second connecting part 2 is screwed into the inner side of the first connecting part 1 by the cooperation of the external thread and the internal thread until the protrusion 2021 is engaged in the corresponding groove 101. Alternatively, the second connecting structure further includes a groove 101 located on the lower side of the internal thread, and the first connecting structure further includes a protrusion 2021 located on the lower side of the external thread, the protrusion 2021 protruding towards the outer side of the base 1033. The groove 101 corresponds to the protrusion 2021. The second connecting part 2 is fitted onto the outer side of the first connecting part 1 by the cooperation of the internal thread and the external thread until the protrusion 2021 is engaged in the corresponding groove 101.

[0034] In this embodiment, when the second connecting structure 202 includes an external thread and the first connecting structure includes an internal thread, the bottom of the second connecting structure 202 is inserted into the upper part of the first connecting structure, aligning the external and internal threads. Then, the second connecting structure 202 is rotated. During this process, the second connecting structure 202 descends, and the protrusion 2021 at the bottom of the second connecting structure 202 gradually approaches the groove 101 on the first connecting structure. Until the protrusion 2021 is fully engaged in the groove 101, the second connecting structure 202 has descended to a certain height and cannot continue rotating in the original direction. At this point, a threaded connection is completed between the second connecting structure 202 and the first connecting structure. Alternatively, when the bottom of the second connecting structure 202 has an internal thread and the upper part of the first connecting structure has an external thread, the upper part of the first connecting structure is inserted into the bottom of the second connecting structure 202, aligning the internal and external threads. Then, the second connecting structure 202 is rotated. During this process, the second connecting structure 202 moves downwards, and the groove 101 at the bottom of the second connecting structure aligns with the groove 101 on the first connecting structure. As the protrusion 2021 gradually approaches and is fully engaged in the slot 101, the second connecting structure 202 can no longer rotate in its original direction. At this point, the second connecting structure 202 and the first connecting structure are connected by a thread. When the protrusion 2021 is set on the first connecting structure and protrudes outward from the first connecting structure, a mutually cooperating protrusion 2021 and slot 101 are provided below the threaded connection section formed by the second connecting structure 202 and the first connecting structure. This forms a limiting structure at the end of the threaded connection section. This limiting structure ensures a tight fit between the first connecting structure and the second connecting part 2, preventing insufficient preload between the second connecting structure 202 and the first connecting structure due to insufficient thread engagement. At the same time, this limiting structure prevents the second connecting structure 202 from continuing to rotate in its original direction, avoiding stripping or thread overload, thereby further improving the threaded connection speed between the second connecting structure 202 and the first connecting structure and ensuring the reliability of the threaded connection between them.

[0035] By providing a mutually cooperating protrusion 2021 and a groove 101 below the threaded connection section formed by the second connection structure 202 and the first connection structure, a judgment standard for full engagement between the internal and external threads is formed, which further improves the threaded connection speed between the second connection structure 202 and the first connection structure, and also prevents the second connection structure 202 from undergoing excessive displacement, thus ensuring the reliability of the threaded connection between the second connection structure 202 and the first connection structure.

[0036] Optionally, such as Figure 4-7 As shown, in one implementation of this embodiment, There are multiple protrusions 2021 and multiple slots 101, and the number of protrusions 2021 is equal to the number of slots 101. The multiple protrusions 2021 and multiple slots 101 are distributed at equal intervals. For example, the multiple protrusions 2021 and multiple slots 101 can be evenly distributed along the circumference of the external thread or the internal thread.

[0037] In this embodiment, there are multiple protrusions 2021 and slots 101, with the number of protrusions 2021 equal to the number of slots 101, and one protrusion 2021 corresponding to one slot 101. The multiple protrusions 2021 are evenly distributed on the second connecting structure 202 or the first connecting structure, with equal distances between any two adjacent protrusions 2021. Similarly, the multiple slots 101 are evenly distributed on the first connecting structure or the second connecting structure 202, with equal distances between any two adjacent slots 101. Each protrusion 2021 is positioned opposite each slot 101. This ensures that the threaded connection segment formed between the second connecting structure 202 and the first connecting structure experiences balanced stress, preventing loosening or deformation of the threaded connection segment due to uneven stress.

[0038] By evenly distributing multiple protrusions 2021 and multiple slots 101 on the second connecting structure 202 and the first connecting structure, it is possible to ensure that the threaded connection segment formed between the second connecting structure 202 and the first connecting structure is subjected to balanced forces. This avoids the occurrence of negative consequences such as loosening or deformation between the second connecting structure 202 and the first connecting structure due to uneven forces on the threaded connection segment, thereby further improving the threaded connection strength between the second connecting structure 202 and the first connecting structure.

[0039] Optionally, such as Figure 2-3 As shown, in one implementation of this embodiment, The first connecting part 1 further includes a positioning boss 104 disposed on the first end face 1031, the positioning boss 104 being used to engage with the cable outlet hole 301 of the housing 3.

[0040] In this embodiment, the bottom end of the first connecting part 1 extends downward to form a positioning boss 104. The power cord 302 passes through the positioning boss 104. The positioning boss 104 can form a connection or limiting fit with the inner wall of the housing 3. The outer diameter of the positioning boss 104 is smaller than the inner diameter of the first connecting part 1. Therefore, the positioning boss 104 can extend into the housing 3 so that the side wall of the housing 3 can connect with the bottom end of the first connecting part 1. The positioning boss 104 can serve as a pre-positioning structure for the first connecting part 1. When installing the first connecting part 1, the positioning boss 104 is first extended into the housing 3, so that the first connecting part 1 and the housing 3 will be roughly aligned, thereby improving the connection speed between the first connecting part 1 and the housing 3. By extending the positioning boss 104 into the housing 3, the first connecting part 1 will directly contact the side wall of the housing 3. In other words, a part of the plug connector will enter the housing 3 downwards. This will reduce the overall height of the plug connector, so that the overall height of the motor using the plug connector will also be reduced, thereby reducing the volume of the motor using the plug connector and making it easier to meet the customer's requirements for the overall height of the motor.

[0041] By setting a positioning boss 104 and making the cross-sectional area of ​​the positioning boss 104 smaller than the cross-sectional area of ​​the first connecting part 1, the positioning boss 104 can extend into the motor housing 3, thereby reducing the overall height of the motor using this plug connector, making it easier to meet the customer's requirements for the overall height of the motor.

[0042] Optionally, such as Figure 2 As shown, in one implementation of this embodiment, The bottom end of the positioning boss 104 is provided with a flexible wire fixing piece 5, and the flexible wire fixing piece 5 is provided with a wire passing groove.

[0043] In this embodiment, a flexible wire fixing piece 5 is provided at the bottom end of the positioning boss 104. The flexible wire fixing piece 5 is sealed to the positioning boss 104. A wire hole for the power line 302 to pass through is provided on the flexible wire fixing piece 5. The hole can be a cross-cut, which serves to fix the position of the power line 302.

[0044] By setting a flexible wire-fixing piece 5 at the bottom of the positioning boss 104, the position of the power cord 302 can be constrained, and dust and foreign objects can be prevented from entering the first connecting part 1 and the plug connector, thus improving the cleanliness of the plug connector.

[0045] Example 2 like Figure 2 , 8As shown in Figure 9, in one implementation of this embodiment, a motor assembly is provided, including: a motor; a plug connector as in Embodiment 1; and a housing 3. The motor is located inside the housing 3. A wire outlet hole 301 is provided on the side wall of the housing 3. A threaded hole is provided on the housing 3 surrounding the wire outlet hole 301. The mounting hole 1034 of the base 103 of the first connecting part 1 is connected to the threaded hole by a screw. The power cord 302 of the motor passes through the wire outlet hole 301 from inside the housing 3 and enters the plug connector, and is electrically connected to the pins of the plug connector.

[0046] In this embodiment, the power cord 302 inside the motor passes out of the outlet hole 301 into the first connecting part 1, then through the second connecting part 2, and is electrically connected to the pin in the second connecting part 2. The pin structure is detachably disposed in the second connecting part 2 to facilitate the electrical connection operation with the power cord 302.

[0047] Since the motor in this embodiment includes the plug connector in Embodiment 1, the motor assembly also has all the beneficial technical effects of the plug connector in Embodiment 1, which will not be elaborated here.

[0048] Optionally, such as Figure 9 As shown, in one implementation of this embodiment, A sealing gasket is provided at the mounting hole 1034 and / or the threaded hole.

[0049] In this embodiment, there are multiple threaded holes evenly distributed around the outlet hole 301, and multiple mounting holes 1034, each corresponding to a threaded hole. When the first connecting part 1 is assembled onto the housing 3, the diameters of the threaded holes and mounting holes 1034 can be enlarged, and sealing washers can be placed inside the threaded holes, or inside the mounting holes 1034, or in both the threaded holes and mounting holes 1034. This allows the sealing washers to deform under the connecting force of the connector, thus fitting snugly against the end face and inner wall of the mating connecting hole, achieving a good seal between the plug connector and the housing 3, and enhancing the market competitiveness of the motor. Both the threaded holes and mounting holes 1034 can be screw holes, and the connector can be a screw that mates with the threaded holes and mounting holes 1034.

[0050] By enlarging the diameter of the threaded hole and the mounting hole 1034, and placing the sealing gasket inside the threaded hole, or inside the mounting hole 1034, or placing the sealing gasket inside both the threaded hole and the mounting hole 1034, the sealing gasket can fit against the end face and inner wall of the connecting hole that it mates with, thereby achieving a good seal between the plug connector and the housing 3 and improving the overall sealing performance of the motor assembly.

[0051] Optionally, such as Figure 2 As shown, in one implementation of this embodiment, The positioning boss 104 of the plug connector passes through the cable outlet 301 to the first end face 1031 of the first connecting part 1 and is in contact with the surface of the housing 3.

[0052] In this embodiment, the positioning boss 104 of the plug connector extends downward into the housing 3 through the cable outlet 301 until the first end face 1031 is in contact with the surface of the housing 3. The positioning boss 104 can serve as a pre-positioning structure for the first connecting part 1. When installing the first connecting part 1, the positioning boss 104 is first extended into the housing 3, so that the first connecting part 1 and the housing 3 are roughly aligned, thereby improving the connection speed between the first connecting part 1 and the housing 3. Extending the positioning boss 104 into the housing 3 will cause the first connecting part 1 to directly abut against the housing 3, that is, a part of the plug connector enters downward into the housing 3. This will reduce the overall height of the motor assembly, making it easier to meet the customer's requirements for the overall height of the motor assembly.

[0053] Preferably, a rectangular step is formed around the cable outlet 301 of the housing 3, which sinks downward from the surface of the housing 3. The cable outlet 301 is located inside the rectangular step and passes through the rectangular step. The bottom surface and outer peripheral surface of the positioning boss 104 abut against the bottom surface and inner peripheral surface of the rectangular step, respectively. The bottom end surface of the first connecting part 1 is flush with and fits against the outer surface of the side wall of the housing 3.

[0054] By extending the positioning boss 104 of the plug connector downwards into the housing 3 through the cable outlet 301 until the side wall of the housing 3 abuts against the bottom end of the first connecting part 1, the overall height of the motor using the plug connector in Embodiment 1 can be reduced, thereby making it easier to meet the customer's requirements for the overall height of the motor. The positioning boss 104 can also serve as a pre-positioning structure for the first connecting part 1, thereby improving the connection speed between the first connecting part 1 and the housing 3.

[0055] Optionally, such as Figure 2 As shown, in one implementation of this embodiment, the motor is a servo motor.

[0056] In this embodiment, since the servo motor uses the plug connector in Embodiment 1, the servo motor also has all the beneficial technical effects of the plug connector in Embodiment 1, which will not be elaborated here.

[0057] In summary, the ingenious design of the plug connector lies in: First, by assembling the plug connector with a first connecting part having a base extending in a first direction and a second connecting part having a second connecting structure with the housing, the installation process between the plug connector and the housing is simplified, production efficiency is improved, and dead space is avoided at the connection between the first connecting part and the housing, thereby facilitating the placement of flat washers between the threaded holes and screws on the housing, thereby improving the airtightness between the first connecting part and the motor housing.

[0058] Secondly, the threaded connection between the first and second connecting parts ensures the connection strength while reducing connecting components and processes, thus improving the connection efficiency. Furthermore, the presence of mating protrusions and grooves below the threaded connection section provides a standard for determining the full engagement of the internal and external threads, further increasing the threaded connection speed between the first and second connecting parts. This also prevents excessive displacement of the second connecting structure, ensuring the reliability of the threaded connection between the second connecting structure and the first connecting part.

[0059] Third, by setting a positioning boss and making the cross-sectional area of ​​the positioning boss smaller than the cross-sectional area of ​​the first connecting part, the positioning boss can extend into the motor housing, thereby reducing the overall height of the motor assembly using this plug connector, making it easier to meet the customer's requirements for the overall height of the motor.

[0060] It can be further understood that in this disclosure, "many" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0061] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0062] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0063] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims of this application.

[0064] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A plug connector, characterized in that, include: The first connecting part (1) includes a base (103), the base (103) having a first end face (1031) and a second end face (1032) disposed opposite to each other along a first direction. The first connecting part (1) also includes a base (1033) extending from the second end face (1032) along the first direction. The base (1033) is provided with a mounting hole (1034), the mounting hole (1034) being located on the periphery of the base (1033). The first end face (1031) is used to fit against the surface of the motor housing (3). The mounting hole (1034) is used for a connector to pass through to fix the first connecting part (1) on the housing (3). The second connecting part (2) extends along a second direction, which intersects with the first direction. A first connecting structure is provided at the end of the base (1033) away from the first end face (1031). A second connecting structure (202) that cooperates with the first connecting structure is provided on the second connecting part (2). The second connecting part (2) is detachably connected to the first connecting part (1) through the second connecting structure (202) and the first connecting structure.

2. The plug connector according to claim 1, characterized in that, The second direction is perpendicular to the first direction, and the second connecting structure (202) is disposed on the second connecting part (2) along the first direction.

3. The plug connector according to claim 1, characterized in that, The second connection structure includes an external thread, and the first connection structure includes an internal thread. The internal thread is adapted to the external thread, and the second connection part (2) is screwed into the inside of the first connection part (1) by the cooperation of the external thread and the internal thread. Alternatively, the second connection structure includes an internal thread, the first connection structure includes an external thread, the internal thread is adapted to the external thread, and the second connection part (2) is fitted onto the outside of the first connection part (1) by the internal thread and the external thread.

4. The plug connector according to claim 3, characterized in that, The second connection structure further includes a protrusion (2021) located on the lower side of the external thread, the protrusion (2021) protruding towards the central axis of the base (1033), and the first connection structure further includes a groove (101) located on the lower side of the internal thread, the groove (101) corresponding to the protrusion (2021) one by one. The second connection part (2) is screwed into the inner side of the first connection part (1) by the external thread and the internal thread until the protrusion (2021) is engaged in the corresponding groove (101). Alternatively, the second connection structure may further include a slot (101) located on the lower side of the internal thread, and the first connection structure may further include a protrusion (2021) located on the lower side of the external thread. The protrusion (2021) protrudes outward from the base (1033), and the slot (101) corresponds one-to-one with the protrusion (2021). The second connection part (2) is fitted onto the outside of the first connection part (1) by the internal thread and the external thread until the protrusion (2021) is engaged in the corresponding slot (101).

5. The plug connector according to claim 4, characterized in that, Multiple protrusions (2021) and multiple slots (101) are provided; The multiple protrusions (2021) are distributed at equal intervals, and the multiple slots (101) are distributed at equal intervals.

6. The plug connector according to claim 1, characterized in that, The first connecting part (1) further includes a positioning boss (104) disposed on the first end face (1031), the positioning boss (104) being used to engage with the cable outlet hole (301) of the housing (3).

7. The plug connector according to claim 6, characterized in that, The bottom end of the positioning boss (104) is provided with a flexible wire fixing piece (5), and the flexible wire fixing piece (5) is provided with a wire passing groove.

8. The plug connector according to claim 1, characterized in that, The first connecting part (1) has a first wiring hole (105) extending along the first direction, and the second connecting part (2) has a second wiring hole (203) extending along the second direction. The first wiring hole (105) and the second wiring hole (203) are connected.

9. A motor assembly, characterized in that, include: Electric motor; The plug connector as described in any one of claims 1-8; The housing (3) contains the motor located inside the housing (3). The housing (3) has a wire outlet hole (301) on its side wall and a threaded hole around the wire outlet hole (301). The mounting hole (1034) of the base (103) of the first connecting part (1) is connected to the threaded hole by a screw. The power cord (302) of the motor passes through the wire outlet hole (301) from inside the housing (3) and enters the plug connector, and is electrically connected to the pins of the plug connector.

10. The motor assembly according to claim 9, characterized in that, A sealing gasket is provided at the mounting hole (1034) and / or the threaded hole.

11. The motor assembly according to claim 9, characterized in that, The positioning boss (104) of the plug connector passes through the wire outlet hole (301) to the first end face (1031) of the first connection part (1) and is in contact with the surface of the housing (3).

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