Retaining device and high voltage connector

Abstract

The application relates to a holding device and a high-voltage connector adopting the same. The holding device comprises a ring body and a plurality of elastic clamping handles which are arranged at intervals and extend backward from the inner hole of the ring body to the rear end of the ring body, at least one of the plurality of elastic clamping handles being a positioning clamping handle and the rest being clamping handles; the outer side of the positioning clamping handle is provided with a positioning protrusion, and the front end of the positioning protrusion forms a first clamping surface for axial clamping; the outer side of the clamping handle is provided with a butt protrusion for radial butt, and the inner side of the rear end of the clamping handle is inwardly provided with a clamping protrusion. The holding device blocks the first sealing ring by clamping the front end sleeve inner wall of the high-voltage connector shell through the positioning clamping handle of the plurality of elastic clamping handles arranged around the ring body, clamps the insulation layer of the cable inwardly through the clamping handle, and prevents the cable from moving forward and backward, so that the functions of avoiding the sealing ring from falling off and the cable from moving forward and backward are realized simultaneously through one piece.

Description

Technical Field

[0001] This application relates to electrical connectors, and more specifically, to a retaining device and a high-voltage connector employing the retaining device. Background Technology

[0002] With the rapid development of the electric vehicle industry in recent years, the demand for high-voltage connectors has been increasing and the requirements have been becoming more stringent. Currently, the high-voltage IPT unshielded connector products on the market have the following problems in actual use: (1) The cable is prone to back-and-forth movement and axial rotation, which leads to misalignment of the R-type terminals. The OEM needs to readjust during installation, which causes inconvenience; (2) The sealing ring that mates with the equipment interface is prone to falling off during installation, disassembly and wire harness transportation, which affects the airtightness and assembly.

[0003] To prevent cable shifting, existing technologies typically include a wire clamp at the connector's tail to hold and fix the cable in place. To prevent axial rotation, existing technologies usually incorporate an anti-rotation structure at the shielding crimp point within the connector cavity. To ensure the sealing ring doesn't detach, existing connectors typically include a sealing ring retainer. While these designs address issues encountered in practical use, they increase the number of parts, leading to increased assembly complexity and higher product costs. Utility Model Content

[0004] The technical problem to be solved by this application is to provide a retaining device that can simultaneously prevent the sealing ring from falling off and the cable from moving back and forth, and a high-voltage connector using the retaining device, in view of the above-mentioned defects of the prior art.

[0005] To address its technical problem, this application proposes a retaining device in its first aspect, comprising a ring body and a plurality of elastic handles spaced apart from the rear end of the ring body through an inner hole surrounding the ring body. At least one of the plurality of elastic handles is a positioning handle, and the rest are clamping handles. The outer side of the positioning handle has a positioning protrusion, and the front end of the positioning protrusion forms a first engagement surface for axial engagement. The outer side of the clamping handle has an abutment protrusion for radial engagement, and the inner side of the rear end of the clamping handle has a clamping protrusion protruding inward.

[0006] In one embodiment of the retaining device according to the first aspect of this application, the plurality of elastic retaining handles are evenly spaced around the inner hole of the ring body.

[0007] In one embodiment of the retaining device according to the first aspect of this application, two radially opposite elastic handles among the plurality of elastic handles are positioning handles, and the rest are clamping handles.

[0008] In one embodiment of the retaining device according to the first aspect of this application, the first engaging surface at the front end of the positioning protrusion is a engaging slope, and the rear end of the positioning protrusion forms a first guiding slope.

[0009] In one embodiment of the retaining device according to the first aspect of this application, the abutting protrusion extends axially along the outer side of the clamping handle, and the rear end of the abutting protrusion forms a second guide slope.

[0010] To address its technical problem, this application proposes a high-voltage connector in a second aspect, comprising a housing and at least one cable passing through the housing from front to back. At least one set of front sleeves and rear sleeves, extending through the housing from front to back, are respectively provided at both ends of the housing. The at least one cable passes through the at least one set of front sleeves and rear sleeves. The stripped core of the cable passes through the front sleeve and connects to a terminal. The connector is characterized by further including a retaining device inserted into the front sleeve from the front end and a first sealing ring fitted outside the front sleeve and blocked by the retaining device. The inner wall of the front sleeve has a positioning boss corresponding to the positioning protrusion. The rear end of the positioning boss forms a second engaging surface that mates with the first engaging surface. The rear end of the inner wall of the front sleeve has an abutting protrusion corresponding to the abutting strip. During the process of the retaining device being inserted into the front sleeve until the first engaging surface and the second engaging surface engage, the abutting protrusion radially presses inward against the abutting strip of the clamping handle, causing the clamping protrusion on the inner side of the clamping handle to clamp the insulation layer of the cable.

[0011] In one embodiment of the high-voltage connector according to the second aspect of this application, the inner wall of the front sleeve is further provided with ribs inserted into the gaps corresponding to the gaps between every two adjacent elastic clasps.

[0012] In one embodiment of the high-voltage connector according to the second aspect of this application, the front end of the positioning boss forms a first abutting slope, and the front side of the abutting boss forms a second abutting slope.

[0013] In one embodiment of the high-voltage connector according to the second aspect of this application, a limiting step is provided on the outer periphery of the rear end of the front sleeve, and the first sealing ring is located between the limiting step and the ring body of the retaining device.

[0014] In one embodiment of the high-voltage connector according to the second aspect of this application, a second sealing ring is provided between the rear end of the rear sleeve and the cable, and a tail cap is also fastened to the rear end of the rear sleeve to abut against the rear end of the second sealing ring.

[0015] The retaining device and high-voltage connector employing the retaining device of this application have the following beneficial effects: According to the embodiments of this application, the retaining device uses a positioning handle among a plurality of elastic handles arranged around the ring body to engage and fix with the inner wall of the front sleeve at the front end of the high-voltage connector housing. This prevents the first sealing ring, which is sleeved on the front sleeve, from falling off by blocking it. Simultaneously, the clamping handle among the plurality of elastic handles is radially pressed inward by the abutment protrusion on the inner wall of the front sleeve, thereby clamping the insulation layer of the cable by the clamping protrusion on the inner side of the clamping handle. This firmly holds the cable in place, preventing it from shifting back and forth and avoiding changes in the terminal position at the cable's front end. Therefore, the retaining device according to the embodiments of this application integrates the sealing ring retainer and the connector tail clamp into a single component, simultaneously achieving the functions of preventing the sealing ring from falling off and preventing the cable from shifting back and forth. This not only simplifies installation and improves the performance reliability and ease of operation of the connector, but also provides significant benefits in terms of weight, size, and cost. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0017] Figure 1 This is a partially exploded structural diagram of a high-voltage connector according to an embodiment of this application;

[0018] Figure 2 yes Figure 1 A schematic diagram of the holding device in the middle;

[0019] Figure 3 yes Figure 2 The structural cross-sectional view of the retaining device shown;

[0020] Figure 4 yes Figure 2 Another structural cross-sectional view of the retaining device shown;

[0021] Figure 5 yes Figure 1 A schematic diagram of the shell structure in the middle;

[0022] Figure 6 yes Figure 1 The side view shown is of the high-voltage connector after it has been installed with the equipment interface.

[0023] Figure 7 yes Figure 6 Structural sectional view along the AA direction;

[0024] Figure 8 yes Figure 7 Enlarged view of section B;

[0025] Figure 9 yes Figure 7 Enlarged view of section C.

[0026] Explanation of reference numerals: 1 - High-voltage connector;

[0027] 11-Housing; 111-Front end sleeve; 112-Rear end sleeve; 113-Limiting step; 114-Rib; 115-Positioning boss; 1151-Second snap-fit ​​surface; 1152-First abutting bevel; 116-Abutting boss; 1161-Second abutting bevel; 12-Cable; 121-Wire core; 122-Insulation layer; 13-Retaining device; 131-Ring body; 132-Inner hole; 133 - Elastic latch; 133a- Positioning latch; 133b- Clamping latch; 134- Positioning protrusion; 1341- First latching surface; 1342- First guide slope; 135- Abutting protrusion; 1351- Second guide slope; 136- Clamping protrusion; 137- Gap; 14- First sealing ring; 15- Second sealing ring; 16- Tail cap; 17- Terminal; 2- Equipment interface; 21- Mounting hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the embodiments and features described herein can be combined with each other unless otherwise specified.

[0029] Figure 1 A partially exploded structural diagram of a high-voltage connector 1 according to an embodiment of this application is shown. See also Figure 1 As shown, the high-voltage connector 1 includes a housing 11 and two cables 12 passing through the housing 11. Two sets of front sleeves 111 and rear sleeves 112, respectively, are provided at the front and rear ends of the housing 11, with the two cables 12 passing through the corresponding set of front sleeves 111 and rear sleeves 112. A retaining device 13 is inserted into the front sleeve 111, and a first sealing ring 14 is fitted over the front sleeve 111, which is blocked by the retaining device 13 to prevent it from falling off. The stripped wire core 121 of the cable 12 passes through the front sleeve 111 and the retaining device 13 and extends out to connect to the terminal 17. The insulation layer 122 of the cable 12 is clamped by the retaining device 13 to prevent the cable 12 from shifting back and forth. Furthermore, a second sealing ring 15 is fitted between the rear end of the rear sleeve 112 and the cable 12, and a tail cap 16 is also fastened to the rear end of the rear sleeve 112 to abut against the rear end of the second sealing ring 15.

[0030] See details Figure 2As shown, the retaining device 13 includes a ring body 131 and a plurality of elastic handles 133. These elastic handles 133 are evenly spaced around the inner hole 132 of the ring body 131 and extend rearward from the rear end of the ring body 131, thus forming a gap 137 between every two adjacent elastic handles 133. Two radially opposing elastic handles 133 are designed as positioning handles 133a, for engaging with the front sleeve 111 to secure the retaining device 13 within the front sleeve 111. The remaining elastic handles are designed as clamping handles 133b, for engaging with the front sleeve 111 to clamp the insulation layer 122 of the cable 12. See also... Figure 2 Combination Figure 3 As shown, each positioning handle 133a has a positioning protrusion 134 protruding from its outer side. The front end of the positioning protrusion 134 forms a first engaging surface 1341 for axial engagement, and the rear end of the positioning protrusion 134 forms a first guide slope 1342. See also Figure 2 Combination Figure 4 As shown, each clamping handle 133b has an abutment protrusion 135 on its outer side for radial contact. The abutment protrusion 135 can extend axially along the outer side of the clamping handle 133b, and the rear end of the abutment protrusion 135 forms a second guide slope 1351. Each clamping handle 133b has a clamping protrusion 136 protruding inward on the inner side of its rear end.

[0031] See also Figure 5 As shown, to cooperate with the insert retaining device 13, the inner wall of the front sleeve 111 of the housing 11 is provided with ribs 114 corresponding to the gap 137 between every two adjacent elastic retaining handles 133, and a positioning boss 115 is provided between two adjacent ribs 144 corresponding to the positioning protrusion 134 on the outer side of the positioning handle 133a, and an abutting boss 116 is provided between two adjacent ribs 144 corresponding to the abutting protrusion 135 on the outer side of the clamping handle 133b. The rear end of each positioning boss 115 forms a second engaging surface 1151 that mates with the first engaging surface 1341 (see...). Figure 8 The front end forms a first abutting slope 1152 that mates with the first guide slope 1342. The front end of each abutting boss 116 forms a second abutting slope 1161 that mates with the second guide slope 1351.

[0032] During the process of the retaining device 13 being inserted into the front sleeve 111 from the front end of the front end sleeve 111 according to the above embodiments of this application, see... Figure 8As shown, the first guide slope 1342 at the rear end of the positioning protrusion 134 of the positioning handle 133a moves rearward along the first abutting slope 1152 at the front end of the positioning boss 115 on the inner wall of the front sleeve 111 until the positioning protrusion 134 passes the positioning boss 115. Then, the positioning handle 133a rebounds, causing the first engaging surface 1341 at the front end of the positioning protrusion 134 to form an axial engagement with the second engaging surface 1151 at the front end of the positioning boss 115, preventing the retaining device 13 from dislodging from the front sleeve 111. At this time, the first sealing ring 14, sleeved on the outside of the front sleeve 111, is sandwiched between the limiting step 113 on the outer periphery of the rear end of the front sleeve 111 and the ring body 131 of the retaining device 13, and is also prevented from falling off. See also... Figure 9 As shown, the second guide slope 1351 at the rear end of the abutment protrusion 135 of the clamping handle 133b moves backward along the second abutment slope 1161 at the front end of the abutment boss 116 on the inner wall of the front sleeve 111, causing the abutment boss 116 to press radially inward against the abutment protrusion 135 of the clamping handle 133b, thereby clamping the insulation layer 122 of the cable 12 with the clamping protrusion 136 on the inner side of the clamping handle 133b. The multiple clamping protrusions 136 on the inner side of the clamping handle 133b together clamp the insulation layer 122 of the cable 12, thus firmly holding the cable 12 in place and preventing the cable 12 from shifting back and forth, thus avoiding changes in the position of the terminal 17 at the front end of the cable 12.

[0033] See also Figure 7 As shown, when assembling the high-voltage connector 1 and the device interface 2 according to the above embodiment of this application, the front sleeve 111 of the housing 11 is inserted into the mounting hole 21 of the device interface 2, so that the terminal 17 of the front end of the cable 12 passes through the front end of the mounting hole 21. Then, the housing 11 and the device interface 2 are fixed with fasteners, for example, to complete the connection. At this time, the first sealing ring 14 located on the front sleeve 111 achieves a sealed connection between the front end of the high-voltage connector 1 and the device interface 2, and the second sealing ring 15 located between the cable 12 and the rear sleeve 112 and the tail cap 16 achieves a rear end seal of the high-voltage connector 1, which can maintain the good airtight performance of the high-voltage connector 1. The retaining device 13 blocks the first sealing ring 14 while clamping the cable 12, which can simultaneously achieve the functions of preventing the sealing ring from falling off and the cable from moving back and forth. Moreover, the retaining device 13 is installed in the mounting hole 21 of the device interface 2 together with the front sleeve 111, without adding extra external space to the high-voltage connector 1.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A holding device, characterized in that The device includes a ring body and a plurality of elastic handles spaced apart from the rear end of the ring body through an inner hole surrounding the ring body. At least one of the plurality of elastic handles is a positioning handle, and the rest are clamping handles. The outer side of the positioning handle has a positioning protrusion, and the front end of the positioning protrusion forms a first engagement surface for axial engagement. The outer side of the clamping handle has an abutment protrusion for radial engagement, and the inner side of the rear end of the clamping handle has a clamping protrusion protruding inward.

2. The holding device according to claim 1, characterized in that The multiple elastic handles are evenly spaced around the inner holes of the ring body.

3. The holding device according to claim 2, characterized in that Of the plurality of elastic handles, two radially opposite elastic handles are positioning handles, and the rest are clamping handles.

4. The holding device of claim 1, wherein The first engaging surface at the front end of the positioning protrusion is an engaging inclined surface, and the rear end of the positioning protrusion forms a first guiding inclined surface.

5. The holding device according to claim 4, characterized in that The abutting protrusion extends axially along the outer side of the clamping handle, and the rear end of the abutting protrusion forms a second guide slope.

6. A high voltage connector comprising a housing and at least one cable passing through the housing, at least one set of front and rear end sleeves being provided at the front and rear ends of the housing respectively, the at least one cable passing through the at least one set of front and rear end sleeves respectively, the stripped core of the cable at the front end being connected to a terminal after passing through the front end sleeve, characterized in that, It also includes a retaining device as described in any one of claims 1-5 that is inserted into the front sleeve from the front end of the front sleeve, and a first sealing ring that is sleeved outside the front sleeve and blocked by the ring body of the retaining device; the inner wall of the front sleeve is provided with a positioning boss corresponding to the positioning protrusion, the rear end of the positioning boss forms a second snap-fit ​​surface that mates with the first snap-fit ​​surface, the rear end of the inner wall of the front sleeve is provided with an abutting boss corresponding to the abutting protrusion, during the process of the retaining device being inserted into the front sleeve until the first snap-fit ​​surface and the second snap-fit ​​surface snap-fit ​​together, the abutting boss presses the abutting protrusion of the clamping handle radially inward, so that the clamping protrusion on the inner side of the clamping handle clamps the insulation layer of the cable.

7. The high voltage connector of claim 6, wherein, The inner wall of the front sleeve is also provided with ribs that are inserted into the gaps corresponding to the gaps between every two adjacent elastic clasps.

8. The high voltage connector of claim 6, wherein, The front end of the positioning boss forms a first abutting slope, and the front of the abutting boss forms a second abutting slope.

9. The high voltage connector of claim 6, wherein, A limiting step is provided on the outer periphery of the rear end of the front sleeve, and the first sealing ring is located between the limiting step and the ring body of the retaining device.

10. The high voltage connector of claim 6, wherein, A second sealing ring is fitted between the rear end of the rear sleeve and the cable, and a tail cap is also fastened to the rear end of the rear sleeve to abut against the rear end of the second sealing ring.

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