Connector pins, connectors and gearboxes

Abstract

The present invention relates to the technical field of metal insert injection molding products, and provides a connector pin, a connector and a gearbox. The connector pin includes: a body, and the outer surface of the body is provided with grooves and / or protrusions. The connector pin provided by the present invention is provided with grooves and / or protrusions on the outer surface of the body. After injection molding, the middle section of the pin is wrapped in plastic to form a connector. When the connector is in use, it is connected to the corresponding mounting hole on the housing of the gearbox. Since the outer surface of the pin body is provided with grooves and / or protrusions, the effective contact area between the pin and the plastic can be increased, so that the leakage path becomes longer, and the difficulty of oil penetration from the leakage path is increased, so that the oil of the gearbox is not easy to seep out from the connector, thereby ensuring that the oil in the gearbox is sufficient, which is conducive to maintaining the normal operation of the gearbox.

Description

Technical Field

[0001] The invention relates to the technical field of metal insert injection molding products, and in particular to a connector pin, a connector and a gearbox. Background Art

[0002] Metal insert injection molding is a method of insert modeling in which the metal insert is pre-fixed in the appropriate position in the mold, and then injected into the plastic for molding. After the mold is opened, the insert is tightly wrapped by the cooled and solidified plastic to form an injection molded product with inserts such as threaded rings and electrodes.

[0003] In the related art, the connector is an injection-molded product with two independent chambers. The connector uses a pin as an insert, and the two ends of the pin are located in two different chambers. One chamber of the connector is sealed and plugged into the housing of the gearbox, and the other chamber is connected to the external wiring harness. Due to the different thermal expansion and contraction coefficients of metal and plastic, a gap may occur at the junction of the pin and the plastic after being subjected to alternating high and low temperature shocks. This gap usually forms a leakage path. The leakage path mentioned here refers to the path for the fluid in the gearbox to flow out, or the path for the fluid outside the gearbox to enter the gearbox. Since the pin structure in the related art is simple, the effective contact area between the pin and the plastic is small, which makes the leakage path short, causing the oil in the gearbox housing to easily penetrate from the gap, resulting in insufficient lubrication of the gearbox and accelerated friction between gears. In addition, the oil also has a cooling effect. Long-term lack of oil may even cause the gearbox to be scrapped. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the related art that the connector easily causes the oil in the gearbox housing to leak, thus affecting the use of the gearbox, thereby providing a connector pin, a connector and a gearbox that are not prone to oil leakage in the gearbox housing.

[0005] The present invention provides a plug pin of a connector, comprising a body, wherein the outer surface of the body is provided with grooves and / or protrusions.

[0006] In one embodiment, at least a portion of the structure of the body is a plate-like structure, and the groove is provided on at least one plate surface of the plate-like structure.

[0007] In yet another embodiment, both plate surfaces of the plate-like structure are provided with the grooves.

[0008] In another embodiment, there are a plurality of grooves, which are spaced apart along the length direction of the board surface. Multiple grooves are spaced apart on the surface of the pin, which is beneficial to extend the leakage path.

[0009] In yet another embodiment, the plate-like structure is provided with the protrusion on at least one side surface adjacent to the plate surface.

[0010] In yet another embodiment, the plate-like structure is provided with the protrusions on two side surfaces adjacent to the plate surface.

[0011] In another embodiment, the plate-like structure is provided with the protrusion on at least one side surface adjacent to the plate surface, and the protrusion and the groove are alternately arranged along the length direction of the plate-like structure. By respectively arranging protrusions and grooves on different surfaces of the plug pin, the leakage path in the circumferential direction of the entire plug pin can be lengthened, which is conducive to improving the effect of preventing oil penetration.

[0012] In another embodiment, the surface roughness of the body is not less than Ra6.3. Increasing the roughness of the outer surface of the pin is helpful to slow down the speed of oil penetration.

[0013] The present invention also provides a connector, including the connector pin described above; the connector includes a first chamber, a second chamber and a partition wall, and along the height direction of the connector, the partition wall separates the first chamber from the second chamber; the connector pin is vertically embedded in the partition wall along the height direction of the partition wall, the needle tail of the connector pin is located in the first chamber, and the needle tip of the connector pin passes through the second chamber and leaks out. In the connector provided by the present invention, the outer surface of the pin and the part in contact with the partition wall form a leakage path. Since the outer surface of each pin is provided with protrusions and / or grooves, the leakage path is increased, which is beneficial to improve the sealing performance of the connector, so that the oil in the gearbox is not easy to seep out from the leakage path in the connector, ensuring the sufficiency of the oil in the gearbox so that the gearbox can operate normally.

[0014] The present invention also provides a gearbox, comprising the above-mentioned connector.

[0015] The technical solution of the present invention has the following advantages:

[0016] The connector pin provided by the present invention is provided with grooves and / or protrusions on the outer surface of the body. After injection molding, the middle section of the pin is wrapped in plastic to form a connector. When the connector is in use, it is connected to the corresponding mounting hole on the housing of the gearbox. Since the grooves and / or protrusions are provided on the outer surface of the body of the pin, the effective contact area between the pin and the plastic can be increased, so that the leakage path becomes longer, which increases the difficulty of oil penetration from the leakage path, making it difficult for the oil in the gearbox to seep out from the connector, thereby ensuring that there is sufficient oil in the gearbox, which is beneficial to maintaining the normal operation of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a connector pin provided in one embodiment of the present invention;

[0019] Figure 2 A front view of a connector pin provided in yet another embodiment of the present invention;

[0020] Figure 3 A schematic structural diagram of a connector provided in one embodiment of the present invention;

[0021] Figure 4 A front view of a connector provided in yet another embodiment of the present invention;

[0022] Figure 5 A bottom view of a connector provided in yet another embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1-pin; 2-protrusion; 3-groove;

[0025] 4-connector; 5-first chamber; 6-needle tail;

[0026] 7-needle tip; 8-second chamber. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Figure 1 FIG. 1 is a schematic diagram of the structure of a connector pin provided in one embodiment of the present invention; Figure 1 As shown, the present invention provides a plug pin 1 of a connector 4, comprising: a body, and a groove 3 and / or a protrusion 2 is arranged on the outer surface of the body.

[0032] For example, the plug pin 1 may be a rod-shaped structure, a plate-shaped structure, or a combination of the above two structures. The upper part of the plug pin 1 is a plate-shaped structure, and the lower part is a rod-shaped structure. The outer surface of the plug pin 1 may be provided with a groove 3, a protrusion 2, or a combination of the groove 3 and the protrusion 2. For example, the plug pin 1 may be a straight plug pin 1, or an arc-shaped plug pin 1 with a certain curvature. By changing the structure of the plug pin 1, the contact area between the plug pin 1 and the plastic in the connector 4 can be increased, thereby extending the leakage path.

[0033] The pin 1 of the connector 4 provided by the present invention has a groove 3 and / or a protrusion 2 on the outer surface of the body. After injection molding, the middle section of the pin 1 is wrapped in plastic, which can increase the effective contact area between the pin 1 and the plastic, making the leakage path longer, increasing the difficulty of oil penetration from the leakage path, and making it difficult for the oil in the gearbox to seep out from the connector 4, thereby ensuring that the oil in the gearbox is sufficient, which is conducive to maintaining the normal operation of the gearbox.

[0034] In one embodiment, at least a portion of the structure of the body is a plate-like structure, and a groove 3 is provided on at least one plate surface of the plate-like structure.

[0035] For example, when the entire plug pin 1 is a plate-like structure, the groove 3 may be provided on one of the plate surfaces of the plug pin 1, or on both plate surfaces. For example, the width and depth of the groove 3 may be designed as required, and the length of the groove 3 may be the same as the width of the plug pin 1. For example, the processing of the groove 3 may be performed by punching a tool to press a depression on the surface of the body.

[0036] In yet another embodiment, grooves 3 are provided on both sides of the plate-like structure.

[0037] In another embodiment, there are multiple grooves 3, and the multiple grooves 3 are spaced apart along the length direction of the board surface. For example, the same board surface can be provided with multiple grooves 3, and the intervals between two adjacent grooves 3 can be equal.

[0038] In another embodiment, the plate-like structure is provided with a protrusion 2 on at least one side surface adjacent to the plate surface. For example, when the entire plug pin 1 is a plate-like structure, the protrusion 2 may be provided on one side surface adjacent to the plate surface of the plug pin 1, or the protrusion 2 may be provided on both sides adjacent to the plate surface of the plug pin 1. For example, the shape and size of the protrusion 2 may be designed as required. For example, the processing of the protrusion 2 may be performed by punching and cutting a tool, and the excess part of the edge of the plate surface of the body is cut off, and the remaining part may form the protrusion 2.

[0039] In yet another embodiment, the plate-like structure is provided with protrusions 2 on two side surfaces adjacent to the plate surface.

[0040] Figure 2 FIG. 2 is a front view of a connector pin provided in another embodiment of the present invention; Figure 2 As shown, in another embodiment, the plate-like structure is provided with protrusions 2 on at least one side surface adjacent to the plate surface, and the protrusions 2 and the grooves 3 are alternately arranged along the length direction of the plate-like structure.

[0041] For example, when both the protrusion 2 and the groove 3 exist, the protrusion 2 and the groove 3 can be arranged alternately from top to bottom along the height direction of the pin 1, and the spacing between the groove 3 and the protrusion 2 can be designed as needed.

[0042] In another embodiment, the surface roughness value of the body is not less than Ra6.3. For example, the surface roughness of the body can be Ra6.3 or Ra12.5. For example, frosted particles or a film can be attached to the surface of the pin 1 to increase its surface roughness. Such an arrangement is conducive to slowing down the penetration speed of the oil.

[0043] Figure 3 A schematic structural diagram of a connector provided in one embodiment of the present invention; Figure 4 A front view of a connector provided in yet another embodiment of the present invention; Figure 5 FIG. 2 is a bottom view of a connector provided in another embodiment of the present invention. Figure 3 , Figure 4 as well as Figure 5As shown, the present invention also provides a connector 4, including the pin 1 of the above-mentioned connector 4; the connector 4 includes a first chamber 5, a second chamber 8 and a partition wall, and along the height direction of the connector 4, the partition wall separates the first chamber 5 from the second chamber 8; the pin 1 of the connector 4 is vertically embedded in the partition wall along the height direction of the partition wall, the needle tail 6 of the pin 1 of the connector 4 is located in the first chamber 5, and the needle tip 7 of the pin 1 of the connector 4 passes through the second chamber 8 and leaks outward.

[0044] For example, three rows of pins 1 may be arranged in parallel and spaced apart in the connector 4, each row may have seven pins 1, and the interval between two adjacent pins 1 may be designed as required. For example, each pin 1 is arranged perpendicular to the horizontal plane of the partition wall. After injection molding, the pin tail 6 and the pin tip 7 of the pin 1 are both located outside the partition wall, and the rest of the pin 1 is wrapped inside the partition wall.

[0045] When in use, the needle tip 7 of the pin 1 can be welded to the flexible circuit board, and then the second chamber 8 of the connector 4 is sealed and connected to the gearbox housing, and the first chamber 5 of the connector 4 is used to connect to the external wiring harness. The outer surface of the pin 1 and the part in contact with the partition wall form a leakage path. Since the outer surface of each pin 1 is provided with a protrusion 2 and / or a groove 3, the leakage path is increased, which is conducive to improving the sealing performance of the connector 4, so that the oil in the gearbox is not easy to seep out from the leakage path in the connector 4, ensuring that the oil in the gearbox is sufficient and the gearbox can operate normally.

[0046] The present invention also provides a gearbox, comprising the above-mentioned connector 4.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A connector pin, It is characterized in that include: A body, wherein grooves and / or protrusions are arranged on the outer surface of the body; At least part of the structure of the body is a plate-like structure, and at least one plate surface of the plate-like structure is provided with the groove; The plate-like structure is provided with the protrusion on at least one side surface adjacent to the plate surface; The plate-like structure is provided with the protrusion on at least one side surface adjacent to the plate surface, and the protrusion and the groove are alternately arranged along the length direction of the plate-like structure; The length of the groove is the same as the width of the pin; The protrusion is processed by using a punching tool to cut off the excess part of the edge of the plate surface of the main body, and the remaining part forms the protrusion.

2. The connector pin according to claim 1, It is characterized in that The grooves are arranged on both plate surfaces of the plate-like structure.

3. The connector pin according to claim 1, It is characterized in that There are a plurality of grooves, and the plurality of grooves are distributed at intervals along the length direction of the board surface.

4. The connector pin according to claim 1, It is characterized in that The plate-like structure is provided with the protrusions on two side surfaces adjacent to the plate surface.

5. The connector pin according to claim 1, It is characterized in that The surface roughness value of the body is not less than Ra6.

3.

6. A connector, It is characterized in that A connector pin comprising any one of claims 1 to 5; The connector comprises a first chamber, a second chamber and a partition wall, and along the height direction of the connector, the partition wall separates the first chamber from the second chamber; The connector pins are vertically embedded in the partition wall along the height direction of the partition wall, the pin tails of the connector pins are located in the first cavity, and the pin tips of the connector pins pass through the second cavity and leak out.

7. A gearbox, It is characterized in that Includes the connector described in claim 6.

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