Connector screw mounting structure and connector

Abstract

The utility model discloses a connector screw installation structure and a connector, which comprise an outer casing and screws, and are characterized in that one end of the outer casing is provided with a cavity, the outer wall of the outer casing is provided with at least one screw installation hole communicated with the cavity, each screw installation hole is internally provided with one screw, and the screw installation holes are communicated with the cavity. The inner end of the screw can penetrate through the screw mounting hole and is inserted into the cavity; a through groove communicated with the corresponding screw mounting hole is formed in the outer side wall of the outer housing, and the through groove is perpendicular to the screw mounting hole; a nut is placed in the through groove, a screw hole in the middle of the nut is coaxially formed in the screw mounting hole, and the screw is in threaded connection with the screw hole of the nut; the outer surface of the screw is sleeved with a sealing ring, and the sealing ring is arranged between the nut and the cavity. The waterproof effect is improved, and the screw is prevented from being lost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of connectors, in particular to a kind of connector screw mounting structure and connector. BACKGROUND

[0002] With the high-speed development of new energy technology, the requirements for connectors are also increasing. A good connector not only requires to meet the basic performance requirements, but also requires reliable structure, convenient assembly and low cost. Customers' requirements for the disassembly reliability of the connector are also increasing, and the unlocking must be done with tools. Due to the installation position, the unlocking position is a certain distance from the installation panel, and the unlocking position is biased towards the middle of the connector.

[0003] As shown in Figure 1 , it is a connector in the prior art, which includes a connector body 101 (a wall-penetrating terminal) and an outer shell 102 mounted on one end of the connector body 101. The outer shell is locked and limited by a screw 103 and the connector body. In this structure, the following disadvantages exist:

[0004] 1. The screw is not waterproof, which causes water leakage at the connection between the screw and the outer shell and the connector body, affecting the waterproof performance of the connector;

[0005] 2. The screw is directly connected through the screw hole on the outer shell and the connector body. After the screw is disassembled with a tool, it is easy to lose;

[0006] 3. The screw hole is directly formed on the outer shell or the connector body. Since the outer shell is made of plastic and most of the connector body is also plastic, the threads of the screw hole are easy to damage. If the embedded nut method is used, the injection molding cost will be higher and the injection molding efficiency will be lower. SUMMARY

[0007] The utility model aims to provide a kind of connector screw mounting structure and connector, by using the structure, both can realize the waterproof of screw position, also can prevent the drop and loss of screw.

[0008] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a kind of connector screw mounting structure, including outer shell and screw, one end of the outer shell is provided with a cavity, at least one screw mounting hole is provided on the outer wall of the outer shell and communicated with the cavity, one screw is arranged in each screw mounting hole, the inner end of the screw can pass through the screw mounting hole and be inserted into the cavity;

[0009] A through groove is provided on the outer side wall of the outer shell and communicated with the corresponding screw mounting hole, and the through groove is perpendicular to the screw mounting hole.

[0010] A nut is arranged in the through slot, a screw hole in the middle of the nut is coaxially arranged in the screw mounting hole, and the screw is connected with the screw hole of the nut in a screwing manner.

[0011] A sealing ring is sleeved on the outer surface of the screw, and the sealing ring is arranged between the nut and the cavity.

[0012] In the technical scheme, an annular protrusion is arranged on the inner surface of the inner end of the screw mounting hole, a through hole is arranged in the middle of the annular protrusion, the sealing ring is arranged between the annular protrusion and the nut, and the inner end of the screw can pass through the through hole and be inserted into the cavity.

[0013] In the technical scheme, the inner surface of the sealing ring is in close contact with the outer surface of the screw.

[0014] In the technical scheme, the inner end surface of the sealing ring abuts against the outer end surface of the annular protrusion.

[0015] In the technical scheme, the inner end surface of the annular protrusion is flush with the inner wall of the cavity.

[0016] In the technical scheme, a smooth surface and external threads are arranged on the outer surface of the screw, the external threads are arranged at the outer end of the smooth surface, the sealing ring is sleeved on the smooth surface, and the external threads are connected with the screw hole of the nut in a screwing manner.

[0017] In the technical scheme, the outer diameter of the external threads is greater than the outer diameter of the smooth surface.

[0018] In the technical scheme, when the inner end of the screw is retracted in the screw mounting hole, the external threads are arranged at the outer end of the screw hole of the nut, or the external threads are connected with the screw hole of the nut in a screwing manner; when the inner end of the screw is inserted into the cavity, the external threads are connected with the screw hole of the nut in a screwing manner.

[0019] In the technical scheme, a tapered surface with a small outer diameter and a large inner diameter is arranged on the inner surface of the outer end side of the screw mounting hole, and the outer end inner diameter of the tapered surface is smaller than the outer end outer diameter of the screw.

[0020] In the technical scheme, at least one notch is arranged on the inner surface of the tapered surface, the outer end of the notch is communicated with the outer wall of the outer shell, and the inner end of the notch is communicated with the through slot.

[0021] In the technical scheme, the inner end surface and the outer end surface of the nut abut against the opposite two side walls of the through slot, and at least two side outer walls of the nut abut against the inner wall of the through slot.

[0022] The utility model also provides a kind of connector, including the connector screw mounting structure above-mentioned, still include connector main body, the one end of connector main body is inserted with the cavity of the outer shell and is matched,

[0023] The outer wall of the connector main body inserted in the cavity is provided with a connector main body hole opposite to the screw mounting hole, and the inner end of the screw is inserted into the corresponding connector main body hole, and the screw locks and limits the connector main body and the outer shell.

[0024] In the above technical solution, the connector main body hole is a blind hole.

[0025] And / or, the inner end of the screw abuts on the inner end face of the connector main body hole.

[0026] Due to the use of the above technical solution, the utility model has the following advantages compared with the prior art:

[0027] 1. In the utility model, a screw mounting hole is provided on the outer shell, the screw is placed into the screw mounting hole, a through groove perpendicular to and communicating with the screw mounting hole is also provided, the nut is directly installed into the through groove, the nut is limited by the through groove, the screw and the nut are screwed, the internal and external movement and locking action of the screw are realized, the screw is limited, the screw is prevented from falling out of the screw mounting hole, the loss of the screw is prevented, a sealing ring is sleeved on the outside of the screw, a sealing effect is achieved, and the waterproof effect is improved.

[0028] 2. In the utility model, an annular protrusion is provided on the inner end face of the inner end of the screw mounting hole, based on the nut, the annular protrusion can limit the sealing ring, limit the position of the sealing ring, ensure the sealing effect of the sealing ring on the screw, and ensure the waterproof effect.

[0029] 3. In the utility model, an outer small and inner large tapered surface is provided on the inner surface of the outer end side of the screw mounting hole, the outer end inner diameter of the tapered surface is smaller than the outer end outer diameter of the screw, after the screw is inserted into the screw mounting hole, the tapered surface can limit the screw, prevent the screw from separating from the screw mounting hole, prevent the loss of the screw, and the screw will not fall off and be lost after being loosened.

[0030] 4. In the utility model, the screw has a smooth surface and an external thread, the smooth surface contacts the inner wall of the sealing ring, which can prevent the sealing ring from being worn and ensure the sealing effect of the sealing ring.

[0031] 5. In the utility model, the nut is detachably installed in the outer shell, the convenience of installing the nut is improved, embedded installation is not required, and the cost is more low. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic diagram in the background art.

[0033] Figure 2 is the structural schematic view of the screw installed on the outer shell in the embodiment one of the utility model;

[0034] Figure 3 is Figure 2 the local enlarged view of the connecting place of the screw and the outer shell in the embodiment one of the utility model;

[0035] Figure 4 is the sectional structural schematic view of the connecting place of the screw and the outer shell in the embodiment one of the utility model (the inner end of the screw is in the through hole);

[0036] Figure 5 is the structural schematic view of the screw in the embodiment one of the utility model;

[0037] Figure 6 is the structural schematic view of the screw, the nut and the sealing ring in the embodiment one of the utility model;

[0038] Figure 7 is the structural schematic view of the connector in the embodiment one of the utility model;

[0039] Figure 8 is the local sectional structural schematic view of the outer shell and the connector main body at the screw in the embodiment one of the utility model (the inner end of the screw has not been inserted into the connector main body hole yet).

[0040] Wherein: 1, outer shell;2, screw;3, cavity;4, screw mounting hole;5, through slot;6, nut;7, sealing ring;8, annular protrusion;9, through hole;10, smooth surface;11, external thread;12, tapered surface;13, screw head;14, notch;15, external tapered surface;20, connector main body;21, connector main body hole;101, connector main body;102, outer shell;103, screw. DETAILED DESCRIPTION

[0041] The utility model will be further described in connection with the drawings and embodiments:

[0042] Embodiment one: refer to Figures 2 to 8 The utility model discloses a connector screw mounting structure, including outer shell 1 and the screw 2 of the outer shell 1 one end is equipped with a cavity 3, the outer wall of the outer shell 1 is equipped with at least one screw mounting hole 4 that communicates with the cavity 3, each screw mounting hole 4 is provided with a screw 2, and the inner end of the screw 2 can pass through the screw mounting hole 4 and be inserted in the cavity 3;

[0043] The outer side wall of the outer shell 1 is equipped with the through slot 5 that communicates with the corresponding screw mounting hole 4, and the through slot 5 is perpendicular to the screw mounting hole 4;

[0044] The through slot 5 is provided with a nut 6, the screw hole in the middle of the nut 6 is coaxially arranged in the screw mounting hole 4, and the screw 2 is connected with the screw hole of the nut 6 through screwing.

[0045] The outer surface of the screw 2 is sleeved with a sealing ring 7, and the sealing ring 7 is arranged between the nut 6 and the cavity 3.

[0046] In this embodiment, the screw mounting hole is directly arranged on the outer shell and communicates with the cavity, and the through slot is arranged and communicates with the middle of the screw mounting hole. The screw is directly placed into the screw mounting hole, and the nut is inserted into the through slot from the outer side wall of the outer shell. The through slot supports and limits the nut. Preferably, the nut is a hexagonal nut, and the through slot limits the circumferential rotation of the nut. The middle of the screw is screwed with the screw hole of the nut, which can limit the screw. Preferably, the nut is a metal nut, and the internal thread of the screw hole of the nut is not easy to damage. Even if the nut is a plastic nut, the internal thread of the plastic nut can be damaged, and the plastic nut can be taken out and quickly replaced. Since the through slot and the screw mounting hole are perpendicular, in this way, after the screw and the nut are connected, the mutual limiting of the two can be realized, the nut is prevented from falling out of the through slot, and the screw is prevented from falling out of the screw mounting hole. The sealing ring is sleeved on the outer surface of the screw, the inner surface of the sealing ring is tightly matched with the inner surface of the screw, the outer surface of the sealing ring abuts against the inner surface of the screw mounting hole, and the outer surface of the sealing ring is tightly matched with the inner surface of the screw mounting hole. The end of the connector body is inserted into the cavity of the outer shell, and then the screw is screwed inward, so that the inner end of the screw is inserted into the connector body, thereby locking the connector body and the outer shell by the screw. In this way, the sealing ring is an elastic sealing ring, and the sealing ring is a rubber sealing ring. The sealing ring can seal the connection between the screw and the outer shell, and has a waterproof effect, preventing water from entering the cavity from the screw mounting hole and causing the connector body to leak. At the same time, when the screw and the connector body are disassembled, the screw moves outward, and the inner end of the screw is separated from the cavity. Due to the limitation of the nut, the screw will not fall off the outer shell, preventing the loss of the screw. At the same time, since the sealing ring is tightly matched with the screw, the sealing ring is limited by the nut, thereby preventing the screw from moving outward and causing the screw to be lost.

[0047] When the screw, the sealing ring and the nut are assembled on the outer shell, the sealing ring is first inserted into the screw mounting hole from the outer end of the screw mounting hole and is arranged close to the cavity after passing the through slot position, then the nut is inserted into the through slot from the outer end of the through slot, and the nut is arranged against the inner end of the through slot, so that the screw hole of the nut is opposite to the screw mounting hole, then the screw is inserted into the screw mounting hole from the outer end of the screw mounting hole, the inner end of the screw passes through the screw hole of the nut and is then inserted into the sealing ring, and the inner end of the screw is arranged close to the cavity. When the connector body is connected, the cavity of the outer shell is sleeved on the connector body, then the screw is rotated, the screw is screwed with the nut, then the inner end of the screw moves inward and is inserted into the connector body, so that the connector body and the outer shell are connected and limited. When the outer shell and the connector body are disassembled, the screw is reversely rotated, the screw moves outward, the inner end of the screw is separated from the cavity, then the outer shell and the connector body are unlocked, and the connector body and the outer shell are relatively pulled apart, so that the connector body and the outer shell are disassembled.

[0048] Referring to Figure 4 As shown in the figure, an annular protrusion 8 is arranged on the inner surface of the inner end of the screw mounting hole 4, a through hole 9 is arranged in the middle of the annular protrusion 8, the sealing ring 7 is arranged between the annular protrusion 8 and the nut 6, and the inner end of the screw 2 can pass through the through hole 9 and is inserted into the cavity 3. The inner surface of the sealing ring is in close contact with the outer surface of the screw; the inner end surface of the sealing ring is arranged against the outer end surface of the annular protrusion; and the inner end surface of the annular protrusion is arranged in flush with the inner wall of the cavity.

[0049] In the embodiment, in order to prevent the sealing ring from moving inward and separating from the screw mounting hole when the screw moves inward, the annular protrusion is arranged to limit the sealing ring and prevent the sealing ring from moving inward excessively, so that the sealing ring is always arranged in the screw mounting hole. Moreover, during the rotation and inward movement of the screw, a certain inward pushing force is applied to the sealing ring, so that the sealing ring is tightly pressed against the annular protrusion, is deformed, is tightly pressed against the outer surface of the screw and is tightly arranged against the inner wall of the screw mounting hole, thereby ensuring the sealing effect and the waterproof effect. Moreover, when the sealing ring is installed, the sealing ring is directly inserted into the screw mounting hole from the outer end of the screw mounting hole and is arranged against the annular protrusion, so that the sealing ring is quickly installed and the installation position is accurate.

[0050] Referring to Figures 4 to 6 As shown in the figure, the outer surface of the screw 2 is provided with a smooth surface 10 and an outer thread 11 (outer screw thread), the outer thread 11 is arranged at the outer end of the smooth surface 10, the sealing ring 7 is sleeved on the smooth surface 10, and the outer thread 11 is connected with the screw hole of the nut 6 in a screwed manner;

[0051] The outer diameter of the outer thread 11 (outer screw thread) is greater than the outer diameter of the smooth surface 10.

[0052] When the inner end of the screw is retracted in the screw mounting hole, the external thread is arranged at the outer end of the screw hole of the nut, or the external thread is screwed with the screw hole of the nut; when the inner end of the screw is inserted into the cavity, the external thread is screwed with the screw hole of the nut.

[0053] If the external thread is arranged on the whole outer surface of the screw, the external thread is easy to scratch and damage the sealing ring when the screw moves in and out relative to the sealing ring, thereby affecting the sealing effect of the sealing ring on the screw. Therefore, in the embodiment, the sealing ring is sleeved on the smooth surface of the screw, and the external thread is used for screwing with the screw hole of the nut. In this way, only the smooth surface contacts the sealing ring when the screw moves in and out, preventing the external thread on the outer surface of the screw from scratching the sealing ring, ensuring the sealing and waterproof effect of the sealing ring on the screw, so that water outside the outer shell cannot enter the cavity from the screw mounting hole, the screw and the through hole, ensuring the waterproof effect.

[0054] Further, since the distance of the external thread is relatively short, if the screw is rotated and moves outward so that the external thread is separated from the screw hole of the nut, the screw is easy to be separated from the nut and the screw mounting hole, resulting in the loss of the screw. Therefore, as shown in Figs. 4 and 5, an inner surface of the outer end side of the screw mounting hole 4 is provided with an outer small and inner large taper surface 12, and an outer end inner diameter of the taper surface 12 is smaller than an outer end outer diameter of the screw 2. Figure 3 、 4 By the taper surface, the outward movement of the screw is limited, that is, even if the external thread of the screw is separated from the screw hole of the nut, the taper surface can limit the outward movement of the screw, preventing the screw from falling out of the screw mounting hole and resulting in the loss of the screw. Further, when the outer end of the screw contacts the taper surface, the inner end of the screw is retracted in the through hole, at this time, the middle part of the screw is inserted into the screw hole of the nut, thereby preventing the nut from falling out of the through slot.

[0055] More preferably, the outer end of the screw 2 is a screw head 13, and the outer end inner diameter of the taper surface is smaller than the outer diameter of the screw head. A cross slot or a slot is arranged on the outer end surface of the screw head, facilitating the rotation of the screw by using a tool.

[0056] At least one gap 14 is arranged around the inner surface of the taper surface 12, the outer end of the gap 14 is communicated with the outer wall of the outer shell 1, and the inner end of the gap 14 is communicated with the through slot 5.

[0057] At least one gap 14 is arranged around the inner surface of the taper surface 12, the outer end of the gap 14 is communicated with the outer wall of the outer shell 1, and the inner end of the gap 14 is communicated with the through slot 5.

[0058] In this embodiment, the outer shell is made of plastic, which has a certain elastic deformation capacity, so that the outer end of the screw mounting hole is provided with an outer taper surface 15 which is large on the outside and small on the inside. The setting of the notch enables the taper surface to deform after the taper surface is subjected to external force, so that the screw can pass through the taper surface into the screw mounting hole. When the screw is loaded into the screw mounting hole, the inner end and the middle part of the screw are both smaller in diameter than the taper hole, so that the inner end can be directly inserted into the screw mounting hole. When the screw head of the screw abuts against the outer end taper surface, an inward pushing force is applied to the screw head, which extrudes the outer end taper surface through the pushing force, so that the taper surface deforms and the screw head passes through the outer end taper surface and the taper surface into the screw mounting hole. After the subsequent external force disappears, the taper surface automatically returns to its original state, so that the taper surface can limit the screw head of the screw and prevent the screw from moving outward and separating from the screw mounting hole.

[0059] As shown in Figure 3 、 4 , the inner end surface and the outer end surface of the nut abut against the opposite two side walls of the through groove, and at least two side outer walls of the nut abut against the inner wall of the through groove. Thus, the two opposite surfaces of the through groove limit the nut to prevent the nut from moving axially relative to the screw mounting hole, and the inner wall of the nut limits the circumferential rotation of the nut, so that the screw can rotate relative to the nut to achieve the screwing of the screw and the nut.

[0060] As shown in Figure 7 、 8 , the utility model also provides a connector, including the connector screw mounting structure above, still include connector main part 20, one end of connector main part 20 with the cavity 3 of outer shell 1 insert joint cooperation;

[0061] The outer wall of the connector main body 20 inserted into the cavity 3 is provided with a connector main body hole 21 opposite to the screw mounting hole 4, and the inner end of the screw 2 is inserted into the connector main body hole 21. The screw 2 locks and limits the connector main body 20 and the outer shell 1.

[0062] Among them, the connector main body has a wall-penetrating terminal for electrical connection, and the outer shell is used for connecting an electric wire, and the electric wire and the wall-penetrating terminal are electrically connected.

[0063] When assembling, the end of the connector main body is inserted into the cavity, and then the screw is rotated to move inward and penetrate into the cavity and be inserted into the connector main body hole, thereby limiting the outer shell and the connector main body. When disassembling, the screw is reversely rotated to retract the inner end of the screw into the through hole, and then a pulling force is applied to the outer shell or the connector main body to disassemble the outer shell and the connector main body. When the screw moves outward, the outer end of the screw is limited by the taper surface, so that the screw does not fall out of the screw mounting hole after being loosened, thereby ensuring that the screw is not lost.

[0064] The connector body hole is a blind hole; the inner end of the screw abuts on the inner end face of the connector body hole. In this embodiment, the connector body hole is a blind hole, which can limit the moving distance of the screw inward and can limit the screw.

[0065] In the description of the utility model, it is understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0066] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or can be integrated; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, for example, two can be connected in a mechanical abutting or abutting mode through abutting, touching and the like, two can also be directly hung or hung through an intermediate medium, and can also be the communication between two elements or the interaction between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.

Claims

1. A connector screw mounting structure comprising an outer housing and a screw, characterized by: One end of the outer shell is provided with a cavity, and at least one screw mounting hole communicating with the cavity is arranged on the outer wall of the outer shell. Each screw mounting hole is provided with a screw. The inner end of the screw can pass through the screw mounting hole and be inserted into the cavity. A through groove communicating with the corresponding screw mounting hole is arranged on the outer side wall of the outer shell, and the through groove is arranged perpendicularly to the screw mounting hole. A nut is arranged in the through groove. A screw hole coaxially arranged in the screw mounting hole is arranged in the middle of the nut. The screw is connected to the screw hole of the nut through screwing. A sealing ring is sleeved on the outer surface of the screw. The sealing ring is arranged between the nut and the cavity.

2. The connector screw mounting structure according to claim 1, characterized by: An annular protrusion is arranged on the inner surface of the inner end of the screw mounting hole. A through hole is arranged in the middle of the annular protrusion. The sealing ring is arranged between the annular protrusion and the nut. The inner end of the screw can pass through the through hole and be inserted into the cavity.

3. The connector screw mounting structure according to claim 2, characterized by: The inner surface of the sealing ring is in close contact with the outer surface of the screw. The inner end surface of the sealing ring abuts against the outer end surface of the annular protrusion. The inner end surface of the annular protrusion is flush with the inner wall of the cavity.

4. The connector screw mounting structure of claim 1, wherein: A smooth surface and an external thread are arranged on the outer surface of the screw. The external thread is arranged at the outer end of the smooth surface. The sealing ring is sleeved on the smooth surface. The external thread is connected to the screw hole of the nut through screwing. The outer diameter of the external thread is greater than the outer diameter of the smooth surface.

5. The connector screw mounting structure of claim 4, wherein: When the inner end of the screw is retracted into the screw mounting hole, the external thread is arranged at the outer end of the screw hole of the nut, or the external thread is screwed with the screw hole of the nut. When the inner end of the screw is inserted into the cavity, the external thread is screwed with the screw hole of the nut.

6. The connector screw mounting structure of claim 1, wherein: A small and large taper surface is arranged on the inner surface of the outer end side of the screw mounting hole. The outer end inner diameter of the taper surface is smaller than the outer end outer diameter of the screw.

7. The connector screw mounting structure of claim 6, wherein: At least one notch is annularly arranged on the inner surface of the taper surface. The outer end of the notch communicates with the outer wall of the outer shell, and the inner end of the notch communicates with the through groove.

8. The connector screw mounting structure of claim 1, wherein: The inner end surface and the outer end surface of the nut abut against the opposite two side walls of the through groove, respectively. At least two side outer walls of the nut abut against the inner wall of the through groove.

9. A connector characterized by comprising: The connector screw mounting structure comprises a connector body. One end of the connector body is inserted into the cavity of the outer shell in a plug-in manner. A connector body hole opposite to the screw mounting hole is arranged on the outer wall of the connector body inserted into the cavity. The inner end of the screw is inserted into the corresponding connector body hole. The screw locks and limits the connector body and the outer shell.

10. The connector of claim 9, wherein: The connector body hole is a blind hole. The inner end of the screw abuts against the inner end surface of the connector body hole. The inner end surface of the annular protrusion is flush with the inner wall of the cavity.

Images