Power plug connector

Abstract

The utility model discloses a power plug connector used for a servo motor, the power plug connector comprises a pedestal, a power contact pin, a signal contact pin, a grounding contact pin and a sealing ring, the power contact pin, the signal contact pin and the grounding contact pin are arranged on the pedestal, first ends of the power contact pin, the signal contact pin and the grounding contact pin are exposed at a front side of the pedestal, and second ends of the power contact pin, the signal contact pin and the grounding contact pin are exposed at a back side of the pedestal. The second ends of the power contact pin, the signal contact pin and the grounding contact pin are exposed on the rear side of the base, the second ends of the power contact pin and the signal contact pin are configured to be connected with a contact pin connecting line, and a grounding part in contact with a motor shell is formed at the second end of the grounding contact pin; a sealing ring groove is formed in the rear side face of the base, the sealing ring is arranged in the sealing ring groove and comprises an outer ring body and a partition body connected to the inner side of the outer ring body, the partition body divides the outer ring body into a first ring body and a second ring body, the first ring body surrounds the power contact pins and the signal contact pins, and the second ring body surrounds the grounding contact pins. When the base is installed on the motor shell, the sealing ring is tightly attached to the motor shell.

Description

Technical Field

[0001] The utility model relates to the technical field of plug-in connectors, in particular to a power plug-in connector for a servo motor. Background Art

[0002] At present, in order to prevent external liquid from entering between the power connector and the motor housing of the servo motor, a sealing ring is provided between the power connector and the motor housing. However, when the motor is in use, the liquid inside may leak out to the base, but there is currently no targeted solution. In addition, the power pins and signal pins are basically welded to the core wire using a vertically arranged tin welding process, which is prone to tin stripping or false welding, and the vertically arranged core wire makes it easy for the core wire to fall off the pin after being stressed, which poses a greater risk to the stable connection of the product. Moreover, the grounding pin basically uses a shrapnel with a raised point to contact the motor housing, which poses a problem of unstable grounding. Utility Model Content

[0003] The purpose of the utility model is to provide a power connector that can solve at least one technical problem mentioned in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a power connector for a servo motor, the power connector comprising a base, a power pin, a signal pin, a ground pin and a sealing ring, the power pin, the signal pin and the ground pin are arranged on the base, the first ends of the power pin, the signal pin and the ground pin are exposed on the front side of the base, the second ends of the power pin, the signal pin and the ground pin are exposed on the rear side of the base, the second ends of the power pin and the signal pin are configured to be connected to the plug The pin connecting wire is connected, and the second end of the grounding pin is formed with a grounding portion in contact with the motor housing; a sealing ring groove is opened on the rear side surface of the base, and the sealing ring is arranged in the sealing ring groove, and the sealing ring comprises an outer ring body and a separator connected to the inner side of the outer ring body, and the separator divides the outer ring body into a first ring body and a second ring body, the first ring body surrounds each of the power pins and the signal pins, and the second ring body surrounds the grounding pin, and when the base is installed on the motor housing, the sealing ring and the motor housing are tightly fitted.

[0005] Optionally, the base is formed with a power pin slot and a signal pin slot which penetrate from front to back, and each of the power pins and the signal pin is respectively inserted into the corresponding power pin slot and the signal pin slot from the rear side of the base; the rear side surface of the base is convexly provided with a closed fence surrounding each of the power pin slots and each of the signal pin slots, and after each of the power pins and the signal pin is respectively inserted into the corresponding power pin slot and the signal pin slot, the area within the fence is sealed with glue.

[0006] Optionally, the base is formed with a plug-in slot running through the front and back and a groove opened on the rear side thereof; the grounding pin includes a plug-in portion and a grounding portion, the plug-in portion is plugged into the plug-in slot, and the grounding portion is arranged in the groove.

[0007] Optionally, the grounding portion has a contact surface facing the rear side, and a plurality of protrusions arranged in a matrix are provided on the contact surface.

[0008] Optionally, a glue pouring groove is formed at the rear end of the plug-in slot, and glue is poured into the glue pouring groove after the grounding pin is assembled on the base.

[0009] Optionally, the glue pouring groove has a non-glue pouring area to expose part of the plug-in portion, and the non-glue pouring area is close to the separator; the separator has a reinforcing sheet extending laterally at least at a position corresponding to the non-glue pouring area.

[0010] Optionally, the plug-in portion is substantially T-shaped, including a plug-in body and two stop portions located at the rear end of the plug-in body, and a tip of at least one of the two stop portions is exposed in a non-glue-filled area of ​​the glue-filling groove.

[0011] Optionally, the length of one of the two stopper portions is greater than the length of the other, and a terminal end of the longer stopper portion is exposed in a non-glue-filled area of ​​the glue-filling groove.

[0012] Optionally, the plug-in portion and the grounding portion are connected via a bending arm, the groove and the plug-in slot are connected via a notch, and the bending arm is arranged corresponding to the notch.

[0013] Optionally, the base is formed with a pin slot extending front to back and a core wire accommodating slot extending rearward and laterally connected to the corresponding pin slot; the power pin and / or the signal pin and the core wire of the corresponding pin connecting wire are axially resistance welded, and the side wall of the core wire is attached to the rear end side of the power pin or the signal pin, the power pin and / or the signal pin is inserted in the pin slot, the core wire is accommodated in the core wire accommodating slot, and glue is poured at the pin slot and the core wire accommodating slot.

[0014] In the utility model, the sealing ring arranged at the rear side of the base is divided into a first ring body and a second ring body by a separator, and the ground pin is surrounded by the second ring body. When the base is installed on the motor housing, in addition to the outer ring body of the sealing ring preventing external liquid from entering the motor interior / the base interior from the connection between the base and the motor housing, when liquid leaks out from the inside of the motor, the separator can prevent the leaked liquid from flowing from the area where the signal pins and the power pins are located to the location where the ground pin is located, which is conducive to improving the reliability of the ground pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a power connector according to an embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of the exploded structure of the power connector of the embodiment of the utility model.

[0017] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure with glue potting, some connecting wires, etc. hidden.

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the sealing ring of the embodiment of the utility model.

[0019] Figure 5 It is a three-dimensional structural schematic diagram of each pin in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0021] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0022] See also Figures 1 to 5The utility model embodiment discloses a power connector for a servo motor, the power connector comprises a base 1, a power pin 2, a signal pin 3, a ground pin 4 and a sealing ring 5, the power pin 2, the signal pin 3 and the ground pin 4 are arranged on the base 1, the first ends of the power pin 2, the signal pin 3 and the ground pin 4 are exposed on the front side of the base 1 to match with the corresponding terminals of the power line end connector, the second ends of the power pin 2, the signal pin 3 and the ground pin 4 are exposed on the rear side of the base 1, the second ends of the power pin 2 and the signal pin 3 are configured to be connected to the pin connection line 6, and the second end of the ground pin 4 forms There is a grounding portion 41 in contact with the motor housing (not shown); a sealing ring groove 11 is opened on the rear side of the base 1, and the sealing ring 5 is arranged in the sealing ring groove 11. The sealing ring 5 includes an outer ring body 51 and a separator 52 connected to the inner side of the outer ring body 51. The separator 52 divides the outer ring body 51 into a first ring body 53 and a second ring body 54. The first ring body 53 surrounds each power pin 2 and the signal pin 3, and the second ring body 54 surrounds the grounding pin 4. When the base 1 is installed on the motor housing, the sealing ring 5 and the motor housing are tightly fitted, that is, the outer ring body 51 and the separator 52 are both tightly fitted to the motor housing to achieve a sealing effect.

[0023] It needs to be explained that the front side of the base 1 refers to the side facing away from the motor, the back side of the base 1 refers to the side facing the motor, and “the first end of the pin is exposed on the front side of the base 1” means that the first end of the pin can be connected to the terminal of the power line end connector on the front side of the base 1, and “the second end of the pin is exposed on the back side of the base 1” means that the second end of the pin can be connected to the pin connecting wire 6 on the back side of the base 1.

[0024] In a specific example, the number of the power pins 2 is three, and the number of the signal pins 3 is two, which are respectively arranged on the upper and lower sides of the base 1 .

[0025] The sealing ring 5 is preferably a high-quality and highly elastic sealing ring that can meet the waterproof standard IP67.

[0026] Normally, the first circle 53 is larger than the second circle 54 , but the present invention is not limited thereto. The first circle 53 is larger than the second circle 54 in that the area of ​​the inner region defined by the first circle 53 is larger than the area of ​​the inner region defined by the second circle 54 .

[0027] In some embodiments, the outer ring body 51 is in a rectangular ring shape, and the second ring body 54 is in a rectangular ring shape and is formed at a corner of the outer ring body 51. However, the present invention is not limited thereto.

[0028] For easy assembly, an opening is formed on the motor housing, each power pin 2 and signal pin 3 is arranged corresponding to the opening, and the ground pin 4 is located outside the opening. The outer ring body 51 of the sealing ring 5 surrounds the opening and the ground pin 4.

[0029] In the present invention, the sealing ring 5 arranged at the rear side of the base 1 is divided into a first ring body 53 and a second ring body 54 by a separator 52, and the ground pin 4 is surrounded by the second ring body 54. When the base 1 is installed on the motor housing, in addition to the outer ring body 51 of the sealing ring 5 preventing external liquid from entering the motor interior / the base 1 interior from the connection between the base 1 and the motor housing, when liquid leaks out from the inside of the motor, the separator 52 can prevent the leaked liquid from flowing from the area where the signal pins 3 and the power pins 2 are located to the location of the ground pin 4, which is conducive to improving the reliability of the ground pin 4.

[0030] In some embodiments, the base 1 can be assembled on the motor housing by fastening screws, but is not limited thereto.

[0031] In some embodiments, the base 1 is formed with a power pin slot 12 and a signal pin slot 13 that penetrate from front to back, and each power pin 2 and signal pin 3 is respectively inserted into the corresponding power pin slot 12 and signal pin slot 13 from the rear side of the base 1; the rear side of the base 1 is convexly provided with a closed fence 14 that surrounds each power pin slot 12 and each signal pin slot 13, and after each power pin 2 and signal pin 3 are respectively inserted into the corresponding power pin slot 12 and signal pin slot 13, a sealing glue 15 is formed in the area within the fence 14. By forming the fence 14 and filling the fence 14 with glue, when liquid leaks out from the inside of the motor, the leaked liquid can be prevented from flowing to each signal pin 3 and power pin 2, which is conducive to improving the reliability of each signal pin 3 and power pin 2.

[0032] Specifically, the fence 14 can be adapted to be disposed at an opening on the motor housing.

[0033] When pouring glue, epoxy resin can be used for pouring glue, but it is not limited to this.

[0034] In some embodiments, the base 1 is formed with a plug-in slot 16 that runs through the front and back and a groove 17 opened on its rear side; the grounding pin 4 includes a plug-in portion 42 and a grounding portion 41, the plug-in portion 42 is plugged into the plug-in slot 16, and the grounding portion 41 is arranged in the groove 17.

[0035] Specifically, the grounding portion 41 has a contact surface 411 facing the rear side, and a plurality of protrusions 412 arranged in a matrix are disposed on the contact surface 411. By virtue of the plurality of protrusions 412 arranged in a matrix on the contact surface 411, a more stable grounding effect can be achieved.

[0036] Specifically, there is a glue pouring groove 18 at the rear end of the plug slot 16. After the grounding pin 4 is assembled on the base 1, glue is poured into the glue pouring groove 18 to form a glue pouring body 181. By providing the glue pouring groove 18 and pouring glue in the glue pouring groove 18, the reliability of the grounding pin 4 can be further ensured.

[0037] More specifically, the glue-filling groove 18 has an unfilled region 182 to expose part of the plug-in portion 42, and the unfilled region 182 is close to the separator 52; the separator 52 extends the reinforcing sheet 55 laterally at least at a position corresponding to the unfilled region 182. Since the glue-filling groove 18 has the unfilled region 182 close to the separator 52, the position of the separator 52 corresponding to the unfilled region 182 will be relatively weak. If there is liquid seepage in the area where the signal pins 3 and the power pins 2 are located, it is easy to enter the position where the ground pin 4 is located from this position, thereby affecting the reliability of the ground pin 4. By extending the reinforcing sheet 55 laterally at least at a position of the separator 52 corresponding to the unfilled region 182, the strength of the corresponding position of the separator 52 can be increased, thereby preventing liquid from entering the position where the ground pin 4 is located from the corresponding position, further ensuring the reliability of the ground pin 4.

[0038] Furthermore, the plug-in portion 42 is substantially T-shaped, including a plug-in body 421 and two stopper portions 422 located at the rear end of the plug-in body 421 , and a distal end of at least one of the two stopper portions 422 is exposed in the non-glue-filled area 182 of the glue-filling groove 18 .

[0039] Furthermore, the length of one of the two stopper portions 422 is greater than the length of the other, and the end of the longer stopper portion 422 is exposed in the non-glue-filled area 182 of the glue-filling groove 18 .

[0040] Since the plug part 42 is roughly T-shaped, the plug slot 16 can be correspondingly set to be roughly T-shaped. In order to firmly install the ground pin 4, the end surfaces of the two stoppers 422 are convexly provided with buckle parts 423. When the plug part 42 is inserted into the plug slot 16, the buckle parts 423 are clamped on the inner wall of the plug slot 16.

[0041] Specifically, the plug-in portion 42 and the grounding portion 41 are connected via a bending arm 43 , the groove 17 and the plug-in slot 16 are connected via a notch 19 , and the bending arm 43 is disposed corresponding to the notch 19 .

[0042] In some embodiments, the power pin 2 and / or the signal pin 3 are axially resistively welded with the core wire 61 of the corresponding pin connection wire 6. Since the power pin 2 and / or the signal pin 3 are axially resistively welded with the core wire 61 of the corresponding pin connection wire 6, the connection between the power pin 2 and / or the signal pin 3 and the core wire 61 of the pin connection wire 6 can be ensured to be more stable, thereby reducing the risk.

[0043] Specifically, the power pin 2 and / or the signal pin 3 is in a plate shape, and the side wall of the core wire 61 is attached to the rear end of one side of the power pin 2 and / or the signal pin 3 .

[0044] In some embodiments, the base 1 is formed with a pin slot 12 / 13 that penetrates front and back and a core wire accommodating slot 10 that penetrates rearward and is laterally connected to the corresponding pin slot 12 / 13; the power pin 2 and / or the signal pin 3 and the core wire 61 of the corresponding pin connecting wire 6 are axially resistance welded, the side wall of the core wire 61 is attached to the rear end side of the power pin 2 or the signal pin 3, the power pin 2 and / or the signal pin 3 are inserted in the pin slot 12 / 13, the core wire 61 is accommodated in the core wire accommodating slot 10, and the pin slot 12 / 13 and the core wire accommodating slot 10 are filled with glue. After the power pin 2 and / or the signal pin 3 and the core wire 61 of the corresponding pin connecting wire 6 are axially resistance welded and assembled, by filling glue in the pin slot 12 / 13 and the core wire accommodating slot 10, in addition to having a sealing effect, the stable connection between the core wire 61 and the power pin 2 or the signal pin 3 can be further guaranteed.

[0045] In some embodiments, one end of the pin connecting wire 6 connected to the power pin 2 is sleeved with a heat shrink tube 7 for sealing and protection.

[0046] The above disclosure is only a preferred example of the present invention, and its role is to facilitate the technical personnel in this field to understand and implement it. Of course, it cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A power connector for a servo motor, characterized in that: The power connector includes a base, a power pin, a signal pin, a ground pin and a sealing ring, wherein the power pin, the signal pin and the ground pin are arranged on the base, the first ends of the power pin, the signal pin and the ground pin are exposed on the front side of the base, the second ends of the power pin, the signal pin and the ground pin are exposed on the rear side of the base, the second ends of the power pin and the signal pin are configured to be connected to the pin connecting wire, and the second end of the ground pin is formed with a grounding portion in contact with the motor housing; a sealing ring groove is provided on the rear side surface of the base, the sealing ring is arranged in the sealing ring groove, the sealing ring includes an outer ring body and a separator connected to the inner side of the outer ring body, the separator divides the outer ring body into a first ring body and a second ring body, the first ring body surrounds each of the power pins and the signal pin, and the second ring body surrounds the ground pin, and when the base is installed on the motor housing, the sealing ring and the motor housing are tightly fitted.

2. The power connector according to claim 1, characterized in that: The base is formed with a power pin slot and a signal pin slot that penetrate from front to back, and each of the power pins and the signal pin is respectively inserted into the corresponding power pin slot and the signal pin slot from the rear side of the base; a closed fence surrounding each of the power pin slots and the signal pin slots is convexly provided on the rear side surface of the base, and after each of the power pins and the signal pin is respectively inserted into the corresponding power pin slot and the signal pin slot, the area within the fence is sealed with glue.

3. The power connector according to claim 1, characterized in that: The base is formed with a plug-in slot that runs through the front and back and a groove that is opened on the rear side thereof; the grounding pin includes a plug-in portion and a grounding portion, the plug-in portion is plugged into the plug-in slot, and the grounding portion is arranged in the groove.

4. The power connector according to claim 3, characterized in that: The grounding portion has a contact surface facing the rear side, and a plurality of protrusions arranged in a matrix are arranged on the contact surface.

5. The power connector according to claim 3, characterized in that: A glue pouring groove is formed at the rear end of the plug slot, and glue is poured into the glue pouring groove after the ground pin is assembled on the base.

6. The power connector according to claim 5, characterized in that: The glue injection groove has a non-glue injection area to expose part of the plug-in portion, and the non-glue injection area is close to the separator; the separator at least extends a reinforcing sheet laterally at a position corresponding to the non-glue injection area.

7. The power connector according to claim 6, characterized in that: The plug-in portion is substantially T-shaped, and comprises a plug-in body and two stopper portions located at the rear end of the plug-in body, and a tip of at least one of the two stopper portions is exposed in a non-glue-filled area of ​​the glue-filling groove.

8. The power connector according to claim 7, characterized in that: The length of one of the two stopper portions is greater than the length of the other, and the end of the longer stopper portion is exposed in the non-glue-filled area of ​​the glue-filling groove.

9. The power connector according to claim 3, characterized in that: The plug-in portion and the grounding portion are connected via a bending arm, the groove and the plug-in slot are connected via a notch, and the bending arm is arranged corresponding to the notch.

10. The power connector according to claim 1, characterized in that: The base is formed with a pin slot that penetrates front and back and a core wire accommodating slot that penetrates rearward and is laterally connected to the corresponding pin slot; the power pin and / or the signal pin and the core wire of the corresponding pin connecting wire are axially resistance welded, and the side wall of the core wire is attached to the rear end side of the power pin or the signal pin, the power pin and / or the signal pin is inserted in the pin slot, the core wire is accommodated in the core wire accommodating slot, and glue is poured at the pin slot and the core wire accommodating slot.

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