An electrical coupler discharge screw assembly

Abstract

The present invention relates to an electric coupler discharge screw assembly, and belongs to the technical field of electric coupler connectors. The discharge screw assembly includes a screw core and a protective cover, the screw core is provided with an axial water outlet hole and a radial water outlet hole, the axial water outlet hole and the radial water outlet hole are connected, the protective cover is provided with a protective cover water outlet hole, and a baffle with an isolation function is provided between the radial water outlet hole and the axial water outlet hole. The electric coupler discharge screw assembly proposed by the present invention, by providing a protective cover and a protective cover water outlet hole, and providing a baffle separating the radial water outlet hole and the axial water outlet hole on the screw core, can still largely block the water used to wash the vehicle, rainwater, dust and other external debris from entering the protective cover of the electric coupler when the radial water outlet hole and the axial water outlet hole are enlarged, thereby greatly reducing the amount of external debris entering and improving the reliability of the operation of the electric coupler.

Description

Technical Field

[0001] The invention relates to the technical field of electric coupler connectors, and in particular to an electric coupler discharge screw assembly. Background Art

[0002] Electric couplers are used in the field of rail transit and are responsible for the electrical and signal connections between adjacent carriages. With the development of rail transit technology, the rail transit industry requires that electric coupler products must have a protective cover to effectively protect the components therein to ensure the reliability of the electric coupler. This requires that the protective cover not only prevent the entry of water and dust, but also effectively drain the accumulated water in the cover caused by rain or vehicle cleaning, and at the same time prevent dust from entering the cover to achieve more ideal protection performance.

[0003] The Chinese utility model patent with application number 202120848457.3 discloses a drainage device for an electric coupler connector, in which a one-way valve assembly for drainage is provided at a low-lying part of the protective cover of the drainage device, and the one-way valve assembly includes a guide core, on which an axial water outlet and a transverse water outlet are provided, the axial water outlet is connected to the inner cavity of the protective cover, and the transverse water outlet connected to the axial water outlet is located on the outside of the protective cover, so that the accumulated water in the protective cover enters the axial water outlet from the low-lying part, and is finally discharged from the transverse water outlet. In addition, in the drainage device, the one-way valve assembly also includes a sealing ring, which covers the water outlet head located on the guide core, and can prevent rainwater from flowing back into the protective cover through the transverse water outlet to a certain extent, thereby ensuring the reliability of the use of the electric coupler.

[0004] In the above-disclosed technical solution, if the drainage effect is to be improved, it is necessary to increase the aperture of the lateral water outlet hole and the axial water outlet hole. However, in this technical solution in which the guide core is exposed to the outside world, when the aperture of the lateral water outlet hole and the axial water outlet hole is increased, it will make it easier for external rainwater and dust to enter the inside of the protective cover, which greatly reduces the electrical performance of the product and affects the reliability of the electric coupler. Summary of the invention

[0005] In view of the defects of the above-mentioned prior art, the present invention proposes an electric coupler discharge screw assembly, the purpose of which is to effectively prevent external rainwater and dust from entering the interior of the protective cover while increasing the lateral water outlet and the axial water outlet.

[0006] The technical solution of the present invention is as follows:

[0007] An electric car coupler discharge screw assembly comprises a screw core and a protective cover, wherein the screw core comprises a hexagonal bolt head, a first connector and a second connector are arranged at two axial ends of the hexagonal bolt head, the first connector is axially provided with an axial water outlet hole, two radial side surfaces of the hexagonal bolt head are respectively provided with a radial water outlet hole, and the axial water outlet holes are connected with the radial water outlet holes; the protective cover comprises an outer protective cover and a cylindrical third connector arranged in the middle position inside the outer protective cover, two protective cover water outlet holes are arranged at the end of the outer protective cover, and the second connector is connected to the third connector.

[0008] Furthermore, a baffle for shielding the radial water outlet hole is provided at one end of the hexagonal bolt head adjacent to the second connecting body.

[0009] Furthermore, radial water outlet holes are arranged on two opposite side surfaces of the hexagonal bolt head.

[0010] Furthermore, the radial width of the baffle along the radial water outlet hole is greater than the diameter of the radial water outlet hole and smaller than the inner diameter of the outer protective cover.

[0011] Furthermore, the two protective cover water outlet holes arranged at the end of the outer protective cover are located in the same radial direction of the end cover.

[0012] Furthermore, the second connecting body is provided with an external thread, the third connecting body is provided with an internal thread along the axial direction, and the second connecting body and the third connecting body are threadedly connected.

[0013] Further, the third connecting body is provided with an axial hole, and the second connecting body is interference-connected with the third connecting body through the axial hole.

[0014] Furthermore, the radial water outlet holes are arranged on two adjacent side surfaces of the hexagonal bolt head, and the protective cover water outlet holes are arranged on one side of the protective cover end surface away from the radial water outlet holes.

[0015] Furthermore, the sum of the thickness of the hexagonal bolt head and the height of the third connecting body is not greater than the inner depth of the outer protective cover.

[0016] Furthermore, the outer protective cover is hexagonal.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The electric coupler discharge screw assembly proposed in the present invention, by providing a protective cover and a protective cover water outlet hole on the protective cover, can still largely block external debris such as water for washing vehicles, rainwater and dust from entering the protective cover of the electric coupler when the radial water outlet hole and the axial water outlet hole are enlarged, thereby greatly reducing the amount of external debris entering and improving the reliability of the electric coupler;

[0019] 2. The electric coupler discharge screw assembly proposed in the present invention is provided with a baffle on the radial water outlet hole of the screw core to isolate the protective cover water outlet hole and the radial water outlet hole, so that external debris entering through the protective cover water outlet hole will be blocked by the baffle and difficult to enter the electric coupler, further reducing the entry of external debris and improving the reliability of the electric coupler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the discharge screw assembly of the present invention;

[0021] Figure 2 The present invention is to release the screw assembly along Figure 1 A schematic diagram of the cross-sectional structure of the hexagonal end face of the middle hexagonal bolt head relative to two vertices in the AA direction;

[0022] Figure 3 The present invention is to release the screw assembly with Figure 2 a left side view of the structure shown;

[0023] Figure 4 The present invention is to release the screw assembly along Figure 3 Schematic diagram of the cross-section structure in the middle BB direction;

[0024] Figure 5 This is a structural schematic diagram of the second embodiment of the discharge screw assembly of the present invention from the perspective of the screw core to the protective cover. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings. In the description of this application, it should be understood that, unless otherwise explicitly stated, the terms "install", "place", "set", "connect", "fix" and the like should be understood in a broad sense and can be understood as a fixed connection or a detachable connection, etc., according to the specific technical solution in which they are located. Ordinary technicians in this field can understand the specific meanings of the above terms according to the specific circumstances involved in the technical solution.

[0026] In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings.

[0027] Figure 1 , Figure 2 The electric vehicle coupler discharge screw assembly shown in the figure comprises a screw core 1 and a protective cover 2. The screw core 1 comprises a hexagonal bolt head 101, the axial direction (i.e. Figure 2The first connector 102 and the second connector 103 are provided at both ends of the outer protective cover 201 (in the horizontal direction shown in the figure) for connecting with the electric car coupler protective cover. The first connector 102 is provided with an axial water outlet 104 along the axial direction. The radial two sides of the hexagonal bolt head 101 are each provided with a radial water outlet 105. The axial water outlet 104 and the radial water outlet 105 are connected. The protective cover 2 includes an outer protective cover 201 and a cylindrical third connector 202 provided in the middle of the outer protective cover 201. The end of the outer protective cover 201 (i.e. Figure 2 The rightmost end face of the outer protective cover 201 shown in the figure is provided with two protective cover water outlet holes 203, and the second connector 103 is connected to the third connector 202. When the electric coupler drain screw assembly is used, the first connector 102 is inserted into the mounting hole of the electric coupler protective cover, and the water in the electric coupler protective cover can be discharged from the protective cover water outlet holes 203 on the protective cover 2 through the axial water outlet holes 104 provided on the first connector 102 and the radial water outlet holes 105 provided on the hexagonal bolt head 101. The protective cover 2 is provided to protect the screw core 1 that plays a role in drainage. Compared with the open drainage structure in the prior art, it can effectively reduce the entry of water or rainwater for washing the vehicle, and protect the reliable operation of the hook in the electric coupler protective cover.

[0028] On the basis of the above-mentioned embodiment, in order to further prevent external debris from entering the electric coupler protective cover through the drain screw assembly, a baffle 106 for shielding the radial water outlet 105 is provided at one end of the hexagonal bolt head 101 adjacent to the second connector 103. The specific position of the baffle 106 varies according to the position of the radial water outlet 105. As long as the baffle is between the radial water outlet and the cover water outlet (such as Figure 4 The baffle shown is located between the upper water outlet hole of the protective cover and the lower radial water outlet hole), and serves to isolate external debris entering through the water outlet hole of the protective cover.

[0029] Figure 1 , Figure 2 and Figure 4 As shown, in order to facilitate the processing, manufacturing, transportation, etc. of the discharge screw assembly, the various parts of the discharge screw assembly can be designed into a regular symmetrical shape. Therefore, when specifically set, the radial water outlet hole 105 can be set on any pair of two opposite side surfaces of the six side surfaces of the hexagonal bolt head 101. The two opposite side surfaces mentioned here are understood to be two mutually parallel side surfaces of the six side surfaces of the hexagonal bolt head. Under this setting, the baffle 106 is symmetrically set at the symmetrical position of the hexagonal bolt head, and the entire screw core 1 is bilaterally symmetrical in structure, which is convenient for the processing, storage and transportation of the entire assembly.

[0030] Furthermore, based on the above-mentioned embodiment, although the baffle 106 can block external debris entering through the protective cover water outlet 203 to a certain extent, if the baffle is set too large, it will hinder the water in the electric car coupler protective cover from flowing out through the axial water outlet and radial water outlet to the protective cover water outlet for final discharge. Therefore, when setting the baffle size, the baffle length located in the axial direction of the radial water outlet can be slightly smaller than the inner diameter of the outer protective cover 201, as long as the screw core 1 can be smoothly installed in the outer protective cover without getting stuck. As for the radial width of the baffle 106 along the radial water outlet 105, it should be larger than the diameter of the radial water outlet 105 and smaller than the inner diameter of the outer protective cover 201, that is, Figure 3 The inner diameter D of the outer protective cover 201 shown in the figure is larger than the radial width W of the baffle 106 along the radial water outlet hole 105, so that the water in the protective cover of the electric coupler can be smoothly discharged from the water outlet hole of the protective cover through the axial water outlet hole and the radial water outlet hole.

[0031] Furthermore, based on the above-mentioned embodiment of setting the baffle 106 and setting the radial water outlet holes 105 on two opposite sides of the six sides of the hexagonal bolt head 101, the two cover water outlet holes 203 set at the end of the outer cover 201 are set in the same radial direction of the outer cover, that is, the two end cover water outlet holes 203 are on the same straight line passing through the center of the plane of the end of the outer cover. Through this arrangement, when the cover 2 is installed on the screw core 1, the cover water outlet holes 203 can be adjusted according to the radial direction of the outer cover. Figure 4 As shown in FIG. 1 , the baffle 106 located above the radial water outlet hole 105 can effectively separate the radial water outlet hole 105 from the protective cover water outlet hole 203. Figure 4 As shown, external debris entering from the outside of the discharge screw assembly can be blocked by the baffle and cannot directly enter the radial water outlet hole 105 and then enter the electrical coupler cover through the discharge screw assembly, effectively preventing the entry of external debris from affecting the safe and reliable operation of the electrical coupler.

[0032] In the technical solution of the present invention, the connection between the screw core 1 and the protective cover 2 can be achieved in a variety of ways. For example, an external thread can be provided on the second connector 103, and an axial hole can be provided on the cylindrical third connector 202, and an internal thread can be provided in the hole, so that the second connector 103 and the third connector 202 can be threadedly connected, and the screw core 1 and the protective cover 2 can be connected in this way. For another example, an axial hole can be provided in the cylindrical third connector 202, and the second connector 103 is interference-connected with the cylindrical third connector 202 through the axial hole. In the above two connection methods, the second connector 103 and the third connector 202 are preferably set to be cylindrical. In order to facilitate the installation of the protective cover 2 on the screw core 1, the end of the outer protective cover 201 can be set to a polygon, preferably a hexagon here, that is, a hexagonal bolt shape.

[0033] Figure 5 FIG. 1 shows another embodiment of the radial water outlet hole 105. The radial water outlet hole 105 is disposed on two adjacent sides of the six sides of the hexagonal bolt head 101, and the protective cover water outlet hole 203 is disposed on a side of the end face of the protective cover 2 away from the radial water outlet hole 105. Figure 5 As shown in the figure, radial water outlet holes are arranged on two adjacent sides above the hexagonal bolt head 101, and the protective cover water outlet hole 203 is arranged below the protective cover 2. With this arrangement, if external debris entering through the protective cover water outlet hole 203 wants to enter the electric coupler protective cover through the radial water outlet hole 105 and the axial water outlet hole 104, it will be blocked by the hexagonal bolt head 101 and the baffle 106, which can effectively prevent external debris from entering the electric coupler protective cover and affecting the reliable operation of the electric coupler therein.

[0034] When the electric coupler discharge screw assembly is used, an external thread can be provided on the first connector 102, and an internal thread can be provided in the mounting hole of the electric coupler protective cover for mounting the discharge screw assembly. The first connector 102 is inserted into the mounting hole of the electric coupler protective cover. Figure 2 As shown in FIG. 1 , the left end face of the hexagonal bolt head 101 of the screw core 1 contacts the electric coupler protective cover. Since the protective cover 2 is used to prevent external debris from entering the electric coupler protective cover through the radial water outlet hole 105 and the axial water outlet hole 104 of the screw core 1, thereby affecting the working reliability of the electric coupler therein, Figure 2 As shown, the sum of the thickness W1 of the hexagonal bolt head 101 and the height H1 of the third connector 202 is not greater than the depth H inside the outer protective cover 201. This arrangement ensures that the left end of the outer protective cover 201 is in close contact with the surface of the electric coupler protective cover during installation, thereby preventing a gap from existing between the left end of the outer protective cover 201 and the surface of the electric coupler protective cover, thereby increasing the probability of foreign matter entering the outer protective cover 201 through the gap and the foreign matter entering the electric coupler protective cover.

Claims

1. An electrical coupler discharge screw assembly, characterized in that: The invention comprises a screw core (1) and a protective cover (2), wherein the screw core (1) comprises a hexagonal bolt head (101), a first connecting body (102) and a second connecting body (103) are arranged at two axial ends of the hexagonal bolt head (101), the first connecting body (102) is provided with an axial water outlet hole (104) along the axial direction, and two radial side surfaces of the hexagonal bolt head (101) are each provided with a radial water outlet hole (105), and the axial water outlet hole (104) and the radial water outlet hole (105) are in communication; The protective cover (2) comprises an outer protective cover (201) and a columnar third connecting body (202) arranged in the middle of the outer protective cover (201); two protective cover water outlet holes (203) are arranged at the end of the outer protective cover (201); the second connecting body (103) and the third connecting body (202) are connected; a baffle (106) for shielding the radial water outlet holes (105) is arranged at one end of the hexagonal bolt head (101) close to the second connecting body (103); The radial water outlet hole (105) is arranged on two opposite side surfaces of the hexagonal bolt head (101); the radial width of the baffle (106) along the radial direction of the radial water outlet hole (105) is greater than the diameter of the radial water outlet hole (105) and smaller than the inner diameter of the outer protective cover (201); the two protective cover water outlet holes (203) arranged at the end of the outer protective cover (201) are located in the same radial direction of the end cover; the second connector (103) is provided with an external thread; the third connector (202) is provided with an internal thread along the axial direction; the second connector (103) and the third connector (202) are threadedly connected.

2. The electric coupler discharge screw assembly according to claim 1, characterized in that: The third connecting body (202) is provided with an axial hole, and the second connecting body (103) is interference-connected with the third connecting body (202) via the axial hole.

3. The electric coupler discharge screw assembly according to claim 1, characterized in that: The radial water outlet holes (105) are arranged on two adjacent side surfaces of the hexagonal bolt head (101), and the protective cover water outlet hole (203) is arranged on a side of the end surface of the protective cover (2) away from the radial water outlet holes (105).

4. The electric coupler discharge screw assembly according to any one of claims 1 to 3, characterized in that: The sum of the thickness of the hexagonal bolt head (101) and the height of the third connecting body (202) is no greater than the depth inside the outer protective cover (201).

5. The electric coupler drain screw assembly according to claim 1, characterized in that: The outer protective cover (201) is hexagonal.

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