CN216958665U

CN216958665U - Sealing washer end cover, connector housing assembly and connector

Info

Publication number: CN216958665U
Application number: CN202220244742.9U
Authority: CN
Inventors: 李冬冬; 姜开轩; 陈然; 赵伟
Original assignee: Tyco Electronics Shanghai Co Ltd; Tyco Electronics Suzhou Ltd
Current assignee: Tyco Electronics Shanghai Co Ltd; Tyco Electronics Suzhou Ltd
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-07-12
Anticipated expiration: 2032-01-29
Also published as: KR20230117045A

Abstract

The utility model discloses a sealing ring end cover for a high-pressure connector, a connector shell assembly and a connector. The sealing washer end cover includes: a main body portion adapted to be mounted in a mating port of a connector housing that mates with a mating connector; a retaining portion connected to the main body portion for retaining a seal ring in a mating port of the connector housing; and a terminal blocking portion connected to the body portion and adapted to engage a terminal inserted into the connector housing to lock the terminal in the connector housing, the seal ring end cap being a unitary piece. In the utility model, the terminal can be locked in the shell through the terminal blocking part formed on the sealing ring end cover, therefore, the utility model does not need to separately provide a terminal locking piece, thereby simplifying the structure of the connector, reducing the assembly difficulty of the connector and reducing the manufacturing cost of the connector.

Description

Sealing washer end cover, connector housing assembly and connector

Technical Field

The utility model relates to a sealing ring end cover for a high-pressure connector, a connector shell assembly comprising the sealing ring end cover and a connector comprising the connector shell assembly.

Background

In the prior art, high-voltage connectors typically include a housing, a terminal, a seal ring, an end cap, and a terminal lock. The terminals are inserted into the housing. A seal ring is disposed in the port of the housing. An end cap is mounted in the port of the housing for retaining the seal ring in the port of the housing. The terminal locking member is inserted into the locking member insertion groove on the housing and engages with the terminal to lock the terminal in the housing to prevent the terminal from being pulled out of the housing.

In the prior art, the high-voltage connector must be separately provided with a terminal locking member, which results in a complicated structure of the connector, difficulty in assembly, and an increase in the cost of the connector.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.

According to one aspect of the present invention, there is provided a seal ring end cap for a high pressure connector, comprising: a main body portion adapted to be mounted in a mating port of a connector housing that mates with a mating connector; a retaining portion connected to the main body portion for retaining a seal ring in a mating port of the connector housing; and a terminal blocking portion connected to the body portion and adapted to engage a terminal inserted into the connector housing to lock the terminal in the connector housing, the grommet end cap being a unitary piece.

According to an exemplary embodiment of the utility model, the retaining portion comprises a resilient catch connected to the body portion adapted to catch onto a raised rib in the connector housing to lock the sealing ring end cap in the prelock position or the final lock position.

According to another exemplary embodiment of the utility model, the resilient catch comprises: the first elastic buckle is provided with a first elastic cantilever and a first bulge formed on the first elastic cantilever; and a second elastic buckle having a second elastic cantilever and a second protrusion formed on the second elastic cantilever. When the seal ring end cap is in the prelock position, the raised rib is captured between the first and second protrusions; the raised rib is latched to one of the first and second protrusions when the seal ring end cap is in the final locking position.

According to another exemplary embodiment of the present invention, a first protrusion is formed on each of two opposite sides of the first elastic cantilever for engaging with two protrusion ribs on the connector housing, respectively; a second protrusion is formed on each of the opposite sides of the second elastic cantilever for engaging with the two protrusion ribs, respectively.

According to another exemplary embodiment of the present invention, the two first bulges are at different height positions on the first resilient cantilever, and the two second bulges are at different height positions on the second resilient cantilever; the first protrusion and the second protrusion on the same side are at different height positions, and the first protrusion and the second protrusion on different sides are at the same height position.

According to another exemplary embodiment of the present invention, the main body portion includes: a cylindrical body adapted to be inserted into a receiving cavity surrounded by an inner peripheral wall of the connector housing; and a lip portion extending radially outward from an outer surface of one end of the cylindrical body. The lip portion abuts against an inner peripheral wall of the connector housing and an end face of the packing when the packing end cap is mounted to a final lock position.

According to another exemplary embodiment of the present invention, the terminal blocking part is connected to an inner side of the cylinder and protrudes from the cylinder by a predetermined height in an axial direction of the cylinder.

According to another exemplary embodiment of the utility model, the end cover of the sealing ring for the high-pressure connector further comprises a cross beam, the cross beam is bridged between two transversely opposite inner sides of the cylindrical body, the two ends of the cross beam are respectively provided with the elastic buckles, and the elastic buckles are connected to the cross beam.

According to another exemplary embodiment of the present invention, the sealing ring end cap includes a pair of terminal stoppers symmetrically arranged at both sides of the cross member for holding two terminals, respectively.

According to another aspect of the present invention, there is provided a connector housing assembly including: a housing having a mating port adapted to mate with a mating housing of a mating connector; a seal ring mounted in the mating port of the housing for sealing the mating port of the housing; and the seal ring end cover for the high-pressure connector is installed in the matching port of the shell, and is used for keeping the seal ring in the matching port of the connector shell and locking a terminal inserted into the shell in the shell.

According to an exemplary embodiment of the utility model, the sealing ring end cap has a pre-lock position and a final lock position relative to the connector housing, the sealing ring end cap being in a position out of interference with the terminal to allow insertion or extraction of the terminal when the sealing ring end cap is mounted in the pre-lock position; when the grommet end cap is installed in the final lock position, the grommet end cap is in a position to engage the terminal to lock the terminal in the connector housing.

According to another exemplary embodiment of the present invention, the mating port of the housing comprises: an outer peripheral wall; and an inner peripheral wall accommodated in an accommodation cavity surrounded by the outer peripheral wall, a gap allowing the counter housing to be inserted is formed between the inner peripheral wall and the outer peripheral wall, and the seal ring is fitted over an outer surface of the inner peripheral wall and adapted to be radially compressed between the inner peripheral wall and the counter housing.

According to another exemplary embodiment of the present invention, the housing includes a terminal holding body at an inside thereof, and a terminal insertion groove for inserting a terminal is formed on the terminal holding body.

According to another exemplary embodiment of the present invention, an insertion groove for inserting the terminal block is further formed on the terminal holding body, the insertion groove communicating with the terminal insertion groove so that the terminal block can be inserted into the terminal insertion groove via the insertion groove and engaged with the terminal.

According to another exemplary embodiment of the present invention, a snap insertion groove for inserting an elastic snap on the end cap of the seal ring is further formed on the terminal holding body; a protruding rib adapted to engage with the elastic snap is formed on an inner wall of the snap insertion groove.

According to another exemplary embodiment of the present invention, the housing further comprises cable insertion holes for inserting cable assemblies, the cable insertion holes communicating with the terminal insertion grooves such that terminals on the cable assemblies can be inserted into the terminal insertion grooves via the cable insertion holes.

According to another exemplary embodiment of the present invention, the cable insertion hole and the mating port are respectively located at both ends of the housing, and an axis of the cable insertion hole is perpendicular to an axis of the mating port.

According to another aspect of the present invention, there is provided a connector including: the connector housing assembly and the cable assembly are inserted into the housing, the cable assembly comprises a cable and a terminal electrically connected to a conductor core of the cable, and the terminal is held in the housing by the seal ring end cover to prevent the terminal from being pulled out of the housing.

According to an exemplary embodiment of the present invention, a locking surface is formed on the terminal; when the seal ring end cover is inserted to the final locking position, the terminal blocking part on the seal ring end cover abuts against the locking surface to lock the terminal in the shell.

In the foregoing exemplary embodiments according to the present invention, the terminal may be locked in the housing by the terminal blocking portion formed on the end cap of the packing, and therefore, the present invention does not need to separately provide a terminal locking member, and therefore, the structure of the connector is simplified, the difficulty of assembling the connector is reduced, and the manufacturing cost of the connector can be reduced.

Other objects and advantages of the present invention will become apparent from the following description of the utility model which refers to the accompanying drawings, and may assist in a comprehensive understanding of the utility model.

Drawings

FIG. 1 shows a perspective view of a connector according to an example embodiment of the utility model;

FIG. 2 shows an exploded schematic view of a connector according to an example embodiment of the utility model;

FIG. 3 shows a perspective view of the housing of the connector shown in FIG. 2;

FIG. 4 shows a perspective view of the end cap of the seal ring of the connector shown in FIG. 2;

FIG. 5 is a schematic diagram showing the relative positions of the end cap of the seal ring, the seal ring and the terminal when the end cap of the seal ring is in a prelock position;

FIG. 6 shows a longitudinal cross-sectional view of the connector with the seal ring end cap in a prelock position, showing the seal ring end cap held in the prelock position by the resilient snap;

FIG. 7 is a schematic diagram showing the relative positional relationship between the end cap of the seal ring, the seal ring and the terminal when the end cap of the seal ring is in a final locked position;

FIG. 8 shows a longitudinal cross-sectional view of the connector when the seal ring end cap is in the final lock position, showing the seal ring end cap held in the final lock position by the resilient catch;

fig. 9 shows an exploded view of a cable assembly of a connector according to an example embodiment of the utility model.

Detailed Description

The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the utility model with reference to the drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

According to one general technical concept of the present invention, there is provided a seal ring end cap for a high-pressure connector, including: a main body portion adapted to be mounted in a mating port of a connector housing that mates with a mating connector; a retaining portion connected to the main body portion for retaining a seal ring in a mating port of the connector housing; and a terminal blocking portion connected to the body portion and adapted to engage a terminal inserted into the connector housing to lock the terminal in the connector housing, the grommet end cap being a unitary piece.

FIG. 1 shows a perspective view of a connector according to an example embodiment of the utility model; FIG. 2 shows an exploded schematic view of a connector according to an example embodiment of the utility model; fig. 3 shows a perspective view of the housing 10 of the connector shown in fig. 2;

fig. 4 shows a perspective view of the end cap 40 of the seal ring of the connector shown in fig. 2.

As shown in fig. 1-4, in the illustrated embodiment, the connector may be a high voltage connector. The connector includes: a connector housing assembly and a cable assembly 20. The connector housing assembly includes a housing 10, a seal ring 30 and a seal ring end cap 40.

As shown in fig. 1-4, in the illustrated embodiment, the housing 10 has a mating port 120 adapted to mate with a mating housing (not shown) of a mating connector. A seal ring 30 is installed in the counterpart port of the housing 10 for sealing the counterpart port 120 of the housing 10. The seal ring end cap 40 is mounted in the mating port 120 of the housing 10 for holding the seal ring 30 in the mating port 120 of the housing 10 and locking the terminal 22 inserted into the housing 10 in the housing 10.

Fig. 5 is a schematic diagram showing the relative positions of the end cap 40, the seal ring 30 and the terminal 22 when the end cap is in the prelock position; FIG. 6 shows a longitudinal cross-sectional view of the connector when the seal ring end cap 40 is in the prelock position, wherein the seal ring end cap 40 is shown held in the prelock position by the

resilient snaps

41, 42; fig. 7 shows a schematic diagram of the relative positional relationship between the seal ring end cap 40, the seal ring 30 and the terminal 22 when the seal ring end cap 40 is in the final locked position; fig. 8 shows a longitudinal cross-sectional view of the connector when the sealing ring end cap 40 is in the final lock position, wherein the sealing ring end cap 40 is shown held in the final lock position by the

resilient catches

41, 42.

As shown in fig. 1-8, in the illustrated embodiment, the seal ring end cap 40 includes:

body portions

410, 440, a holding portion, and a terminal block portion 420. The

body portions

410, 440 are adapted to be mounted in a mating port 120 of the connector housing 10 that mates with a mating connector (not shown). The retaining portions are connected to the

body portions

410, 440 for retaining the seal ring 30 in the mating port 120 of the connector housing 10. The terminal blocking portions 420 are connected to the

body portions

410, 440, and adapted to engage with the terminals 22 inserted into the connector housing 10 to lock the terminals 22 in the connector housing 10. In the illustrated embodiment, the seal ring end cap 40 is a unitary piece, for example, the seal ring end cap 40 may be a one-piece injection molded piece.

As shown in fig. 1-8, in the illustrated embodiment, the seal ring end cap 40 has a pre-lock position and a final lock position relative to the connector housing 10. As shown in fig. 5, when the seal ring end cap 40 is installed in the prelock position, the seal ring end cap 40 is in a position out of interference with the terminal 22 to allow insertion or removal of the terminal 22. When the sealing ring end cap 40 is installed in the final lock position, the sealing ring end cap 40 is in a position to engage the terminal 22 to lock the terminal 22 in the connector housing 10, as shown in fig. 7.

As shown in fig. 1 to 8, in the illustrated embodiment, the retaining portion of the seal ring end cap includes

resilient snaps

41, 42. Resilient snaps 41, 42 are connected to the

body portions

410, 440 and are adapted to snap onto raised ribs 134 in the connector housing 10 to lock the sealing ring end cap 40 in either the prelock position or the final lock position.

As shown in fig. 1 to 8, in the illustrated embodiment, the

elastic clasps

41, 42 include: a first resilient catch 41 and a second resilient catch 42. The first elastic catch 41 has a first elastic cantilever 41b and a first protrusion 41a formed on the first elastic cantilever 41 b. The second elastic catch 42 has a second elastic cantilever 42b and a second protrusion 42a formed on the second elastic cantilever 42 b.

As shown in fig. 6, in the illustrated embodiment, when the seal ring end cap 40 is in the prelock position, the raised rib 134 is captured between the first and

second protrusions

41a, 42a, thereby retaining the seal ring end cap 40 in the prelock position. As shown in fig. 8, in the illustrated embodiment, the raised rib 134 catches on one of the first and

second protrusions

41a, 42a when the sealing ring end cap 40 is in the final locking position, thereby retaining the sealing ring end cap 40 in the final locking position.

As shown in fig. 1 to 8, in the illustrated embodiment, one first protrusion 41a is formed on each of the opposite sides of the first elastic cantilever 41b for engaging with two protrusion ribs 134 on the connector housing 10, respectively. One second projection 42a is formed on each of the opposite sides of the second elastic cantilever 42b for engagement with the two projection ribs 134, respectively.

As shown in fig. 1 to 8, in the illustrated embodiment, two first protrusions 41a are at different height positions on a first resilient cantilever 41b, and two second protrusions 42a are at different height positions on a second resilient cantilever 42 b. The first projection 41a and the second projection 42a on the same side are at different height positions, and the first projection 41a and the second projection 42a on different sides are at the same height position.

As shown in fig. 1-8, in the illustrated embodiment, the

body portions

410, 440 include: a cylinder 410 and a lip 440. The cylindrical body 410 is adapted to be inserted into a receiving cavity surrounded by the inner circumferential wall 122 of the connector housing 10. The lip portion 440 extends radially outward from the outer surface of one end of the cylindrical body 410. As shown in fig. 1 and 7-8, in the illustrated embodiment, when the sealing ring end cap 40 is installed in the final-lock position, the lip portion 440 abuts against the inner peripheral wall 122 of the connector housing 10 and the end face of the sealing ring 30, thereby retaining the sealing ring 30 in the mating port 120 of the housing 10.

As shown in fig. 1 to 8, in the illustrated embodiment, the terminal stopper 420 on the seal ring end cap 40 is connected to the inside of the cylinder 410 and protrudes from the cylinder 410 by a predetermined height in the axial direction of the cylinder 410.

As shown in fig. 1-8, in the illustrated embodiment, the seal ring end cap further includes a cross member 430, and the cross member 430 spans between the laterally opposite inner sides of the cartridge 410. The elastic buckles 41 and 42 are respectively disposed at both ends of the cross member 430, and the

elastic buckles

41 and 42 are connected to the cross member 430.

As shown in fig. 1-8, in the illustrated embodiment, the seal ring end cap 40 includes a pair of terminal stops 420. A pair of terminal stoppers 420 are symmetrically disposed on both sides of the beam 430 for holding the two terminals 22 of the connector, respectively.

As shown in fig. 1 to 8, in another exemplary embodiment of the present invention, there is also disclosed a connector housing assembly including: a housing 10, a seal ring 30 and a seal ring end cap 40. The housing 10 has a mating port 120 adapted to mate with a mating housing of a mating connector. The seal ring 30 is installed in the counterpart port 120 of the housing 10 for sealing the counterpart port 120 of the housing 10. The seal ring end cap 40 is mounted in the mating port 120 of the housing 10, and the seal ring end cap 40 serves to hold the seal ring 30 in the mating port 120 of the connector housing 10 and to lock the terminal 22 inserted into the housing 10 in the housing 10.

As shown in fig. 1 to 8, in the illustrated embodiment, the mating port 120 of the housing 10 includes: an outer peripheral wall 121 and an inner peripheral wall 122. The inner circumferential wall 122 is accommodated in an accommodation chamber surrounded by the outer circumferential wall 121. A gap allowing the counter housing to be inserted is formed between the inner peripheral wall 122 and the outer peripheral wall 121, and the seal ring 30 is fitted over the outer surface of the inner peripheral wall 122 and adapted to be radially compressed between the inner peripheral wall 122 and the counter housing.

As shown in fig. 1 to 8, in the illustrated embodiment, the housing 10 includes a terminal holding body 130 inside thereof, and a terminal insertion groove 131 for inserting the terminal 22 is formed in the terminal holding body 130.

As shown in fig. 1 to 8, in the illustrated embodiment, a slot 132 for inserting a terminal stopper 420 of the seal ring end cap 40 is further formed on the terminal holding body 130, and the slot 132 communicates with the terminal slot 131 so that the terminal stopper 420 can be inserted into the terminal slot 131 through the slot 132 and engaged with the terminal 22.

As shown in fig. 1 to 8, in the illustrated embodiment, the terminal holding body 130 is further formed with a snap insertion groove 133 for inserting the

elastic snaps

41 and 42 of the seal ring end cap 40. A projection rib 134 adapted to be engaged with the

elastic catches

41, 42 is formed on an inner wall of the catch slot 133.

As shown in fig. 1-8, in the illustrated embodiment, the housing 10 further includes a cable receptacle 111 for plugging the cable assembly 20. The cable insertion holes 111 communicate with the terminal insertion grooves 131 so that the terminals 22 on the cable assembly 20 can be inserted into the terminal insertion grooves 131 via the cable insertion holes 111.

As shown in fig. 1 to 8, in the illustrated embodiment, the cable insertion hole 111 and the mating port 120 are located at both ends of the housing 10, respectively, and the axis of the cable insertion hole 111 is perpendicular to the axis of the mating port 120.

As shown in fig. 1 to 8, in another exemplary embodiment of the present invention, there is also disclosed a connector including: a connector housing assembly and a cable assembly 20. The cable assembly 20 is inserted into the housing 10. The cable assembly 20 includes a cable 21 and a terminal 22 electrically connected to a conductor core 211 of the cable 21. The terminal 22 may be soldered to the conductor core 211 of the cable 21, for example. The terminal 22 is held in the housing 10 by the seal ring end cap 40 to prevent the terminal 22 from being pulled out of the housing 10.

As shown in fig. 1 to 8, in the illustrated embodiment, a notch 221 is formed on the terminal 22, and the terminal 22 has a locking surface 22a on one side of the notch 221. As shown in fig. 1-2 and 7, when the end cap 40 is inserted to the final locking position, the terminal stop 410 of the end cap 40 is inserted into the notch 221 of the terminal 22 and abuts against the locking surface 22a to lock the terminal 22 in the housing 10.

Fig. 9 shows an exploded view of the cable assembly 20 of the connector according to an example embodiment of the utility model.

As shown in fig. 1-9, in the illustrated embodiment, the cable assembly 20 further includes a latch cover 23 and a cable clamp 24. A locking sleeve 23 is fitted over the cable 21 and locked to the housing 10. The cable clamp 24 is fitted over the cable 21 and assembled in the locker 23. The locker 23 applies a predetermined clamping force on the cable clamp 24 to clamp and fix the cable 21 by the cable clamp 24.

As shown in fig. 1 to 9, in the illustrated embodiment, the cable assembly 20 further includes a cable grommet 25, and the cable grommet 25 is fitted over the cable 21 and inserted into the cable insertion hole 111 on the housing 10. When the cable packing 25 is inserted into the cable insertion hole 111 on the housing 10, the cable packing 25 is radially pressed between the inner surface of the cable insertion hole 111 of the housing 10 and the outer surface of the cable 21 to seal a gap therebetween.

As shown in fig. 1 to 9, in the illustrated embodiment, the cable clamp 24 is disposed between the cable grommet 25 and the locker 23, and both the cable clamp 24 and the cable grommet 25 are inserted into the cable insertion hole 111 of the housing 10.

As shown in fig. 1 to 9, in the illustrated embodiment, the cable clamp 24 includes a plurality of resilient claws 241 for clamping onto the cable 21. The locker 23 includes a tapered inner surface for radially pressing the elastic jaw 241. The plurality of elastic claws 241 are adapted to hold the cable 21 under the compression of the catching sleeve 23.

As shown in fig. 1 to 9, in the illustrated embodiment, the lock sleeve 23 includes: a cylindrical portion 231 and catching

portions

232 and 233. The cylindrical portion 231 of the lock sleeve 23 is fitted around the cable 21, and the tapered inner surface is formed inside the cylindrical portion 231 of the lock sleeve 23. The buckling

parts

232, 233 are connected to the cylindrical part 231, and locking features 23a adapted to be locked to the housing 10 are formed on the buckling

parts

232, 233.

As shown in fig. 1-9, in the illustrated embodiment, a plurality of resilient fingers 241 are evenly spaced around the circumference of the cable 21. The

catch portions

232, 233 of the cable clamp 24 include a sidewall 232 and a radial wall 233 connected between the sidewall 232 and the cylindrical portion 231. In the illustrated embodiment, the main body portion of the cable clamp 24 is accommodated in the space surrounded by the catching

portions

232, 233, and the plurality of elastic claws 241 are inserted into the cylindrical portion 231. The aforementioned latching features 23a are formed on the side walls 232 of the latching

portions

232, 233.

As shown in fig. 1-9, in the illustrated embodiment, a mating latching feature 10a is formed on an outer wall of the housing 10 that is adapted to mate with a latching feature 23a on a latching sleeve 23 of the cable assembly 20 to latch the latching sleeve 23 to the housing 10. In the illustrated embodiment, the latching features 23a are detents and the mating latching features 10a are protrusions. However, the utility model is not limited to the illustrated embodiment, for example, the latching feature 23a may be a protrusion and the mating latching feature 10a may be a catch slot.

It will be appreciated by those skilled in the art that the above described embodiments are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without structural or conceptual conflicts, and that such modifications are intended to fall within the scope of the present invention.

Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the utility model.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the utility model.

Claims

1. A seal ring end cap for a high pressure connector, comprising:

a main body portion adapted to be mounted in a mating port of a connector housing that mates with a mating connector;

a retaining portion connected to the main body portion for retaining a seal ring in a mating port of the connector housing; and

a terminal blocking portion connected to the body portion and adapted to engage with a terminal inserted into the connector housing to lock the terminal in the connector housing,

the sealing ring end cover is an integrated piece.

2. The seal ring end cap for a high-pressure connector as claimed in claim 1, wherein:

the retention portion includes a resilient snap connected to the body portion adapted to snap onto a raised rib in the connector housing to lock the seal ring end cap in a prelock position or a final lock position.

3. The seal ring end cap for a high-pressure connector as claimed in claim 2, wherein:

the elasticity buckle includes:

the first elastic buckle is provided with a first elastic cantilever and a first bulge formed on the first elastic cantilever; and

a second elastic buckle having a second elastic cantilever and a second protrusion formed on the second elastic cantilever,

when the seal ring end cover is in the pre-locking position, the convex rib is locked between the first convex and the second convex,

the raised rib is latched to one of the first and second protrusions when the seal ring end cap is in the final locking position.

4. A seal ring end cap for a high pressure connector as claimed in claim 3, wherein:

a first protrusion is formed on each of two opposite sides of the first elastic cantilever for respectively engaging with two protrusion ribs on the connector housing;

a second protrusion is formed on each of opposite sides of the second elastic cantilever for engagement with the two protrusion ribs, respectively.

5. The seal ring end cap for a high-pressure connector as claimed in claim 4, wherein:

the two first bulges are positioned at different height positions on the first elastic cantilever, and the two second bulges are positioned at different height positions on the second elastic cantilever;

the first protrusion and the second protrusion on the same side are at different height positions, and the first protrusion and the second protrusion on different sides are at the same height position.

6. The seal ring end cap for a high-pressure connector as claimed in claim 2, wherein:

the main body portion includes:

a cylindrical body adapted to be inserted into a receiving cavity surrounded by an inner peripheral wall of the connector housing; and

a lip portion extending radially outward from an outer surface of one end of the cylindrical body,

the lip portion abuts against an inner peripheral wall of the connector housing and an end face of the packing when the packing end cap is mounted to a final lock position.

7. The seal ring end cap for a high-pressure connector as claimed in claim 6, wherein:

the terminal stopper is connected to an inner side of the cylinder and protrudes from the cylinder by a predetermined height in an axial direction of the cylinder.

8. The seal ring end cap for a high-pressure connector as claimed in claim 6, further comprising:

a cross beam bridging between two transversely opposite inner sides of the cylindrical body,

the elastic buckles are respectively arranged at two ends of the cross beam and connected to the cross beam.

9. The seal ring end cap for a high-pressure connector as claimed in claim 8, wherein:

the seal ring end cap includes a pair of terminal blocking portions symmetrically disposed on both sides of the cross member for respectively holding two terminals.

10. A connector housing assembly, comprising:

a housing having a mating port adapted to mate with a mating housing of a mating connector;

a seal ring installed in the mating port of the housing for sealing the mating port of the housing; and

a seal ring end cap for a high-pressure connector according to any one of claims 1 to 9, mounted in a mating port of the housing,

the seal ring end cap is used to retain the seal ring in a mating port of the connector housing and to lock a terminal inserted into the housing in the housing.

11. The connector housing assembly of claim 10, wherein:

the seal ring end cap has a prelock position and a final lock position relative to the connector housing,

when the sealing ring end cover is installed at the pre-locking position, the sealing ring end cover is in a position which does not interfere with the terminal so as to allow the terminal to be inserted or pulled out;

the seal ring end cap is in a position to engage the terminal when the seal ring end cap is installed in the final lock position to lock the terminal in the connector housing.

12. The connector housing assembly of claim 11, wherein:

the mating port of the housing includes:

an outer peripheral wall; and

an inner peripheral wall accommodated in an accommodating cavity surrounded by the outer peripheral wall,

a gap allowing the counter housing to be inserted is formed between the inner circumferential wall and the outer circumferential wall, and the seal ring is fitted over an outer surface of the inner circumferential wall and adapted to be radially compressed between the inner circumferential wall and the counter housing.

13. The connector housing assembly of claim 11, wherein:

the housing includes a terminal holding body located inside thereof, and a terminal insertion groove for inserting a terminal is formed on the terminal holding body.

14. The connector housing assembly of claim 13, wherein:

an insertion groove for inserting the terminal blocking portion is further formed on the terminal holding body, the insertion groove communicating with the terminal insertion groove so that the terminal blocking portion can be inserted into the terminal insertion groove via the insertion groove and engaged with the terminal.

15. The connector housing assembly of claim 13, wherein:

a buckle slot for inserting an elastic buckle on the sealing ring end cover is formed on the terminal holding body;

a projection rib adapted to be engaged with the elastic snap is formed on an inner wall of the snap insertion groove.

16. The connector housing assembly of claim 13, wherein:

the housing further includes cable insertion holes for inserting cable assemblies, the cable insertion holes communicating with the terminal insertion grooves so that terminals on the cable assemblies can be inserted into the terminal insertion grooves via the cable insertion holes.

17. The connector housing assembly of claim 16, wherein:

the cable jack and the matching port are respectively positioned at two ends of the shell, and the axis of the cable jack is perpendicular to the axis of the matching port.

18. A connector, comprising:

the connector housing assembly of any one of claims 11-17; and

a cable assembly inserted into the housing,

the cable assembly includes a cable and a terminal electrically connected to a conductor core of the cable,

the terminal is retained in the housing by the grommet end cap to prevent the terminal from being pulled out of the housing.

19. The connector of claim 18, wherein:

a locking surface is formed on the terminal;

when the seal ring end cover is inserted to the final locking position, the terminal blocking part on the seal ring end cover abuts against the locking surface to lock the terminal in the shell.