CN220138846U - High-voltage connector with secondary lock - Google Patents

Abstract

The utility model discloses a high-voltage connector with a secondary lock, which comprises a plug shell, a socket shell and a CPA locking piece, wherein a primary locking baffle and a secondary locking protrusion are arranged on the socket shell, a primary lock catch is arranged in the plug shell, the CPA locking piece extends to be provided with a locking part at the front end of the plug in the plug-in direction, the free end of the locking part is provided with a secondary hook matched with the secondary locking protrusion, a baffle is arranged on the locking part perpendicular to the plug-in direction, a CPA stop block interfering with the baffle is arranged on the plug-in path of the CPA locking piece in the plug shell, and the CPA stop block stops the baffle when in a preassembly position and releases the blocking of the baffle when in a secondary locking position. According to the technical scheme, the preassembly insertion position limiting structure is simplified, the space of part of the plug shell is released, manufacturing materials are saved, the whole weight is lightened, and the requirements of light weight and cost reduction are met.

Description

High-voltage connector with secondary lock

Technical Field

The utility model relates to the technical field of connectors, in particular to a high-voltage connector with a secondary lock.

Background

With the gradual reduction of petroleum resources, the market share of the existing new energy electric automobile is increasingly promoted, and a wire harness is one of important parts of the electric automobile, is similar to the nerve organization of a human body, and is used for timely transmitting information of a power supply, signals, sensors and the like. Among them, the connector is an important component of the wire harness, and is mainly used for interconnection between the wire harnesses. In order to achieve better locking and fixing effects, the conventional high-voltage connector is usually fixed by adopting a CPA (Connector Position Assurance, connector position maintaining) mechanism, so that the locking and fixing effects of the connector are better, and the CPA mechanism can also be called as a secondary lock.

Common CPA mechanism contains CPA locking piece and the limit structure who adapts to and set up on plug casing, socket casing, is equipped with hasp and the pre-installation that is used for realizing secondary locking on the CPA locking piece and inserts position limiting structure, pre-installation and extract position limiting structure, but current CPA locking piece its pre-installation inserts position limiting structure comparatively redundant, and space occupation and material use are more, can not satisfy demands such as lightweight, reduce cost.

Disclosure of Invention

An object of the present utility model is to provide a high-voltage connector with a secondary lock, which solves the problems that the prior art has more occupied space and more material usage due to limiting the preassembled insertion position of the CPA locking piece, and cannot meet the requirements of light weight, low cost, etc.

The utility model provides a high-voltage connector with a secondary lock, which comprises a plug and a socket which are matched and spliced, wherein the plug comprises a plug shell, the socket comprises a socket shell, CPA locking sheets are inserted on the plug shell along the splicing direction of the plug shell, a primary locking and blocking table and a secondary locking protrusion are sequentially arranged at one end of the socket shell, which faces to the splicing direction, at intervals, and a primary lock catch which is in non-return fit with the primary locking and blocking table is arranged in the plug shell, and the high-voltage connector is characterized in that: the CPA locking piece extends at the front end of the plug inserting direction and is provided with a locking part, the free end of the locking part is provided with a secondary hook matched with a secondary locking protrusion, a baffle is arranged on the locking part perpendicular to the inserting direction, a CPA stop block interfering with the baffle is arranged on an inserting path of the CPA locking piece in the plug shell, after the plug shell is inserted with the socket shell, the CPA locking piece is driven to move along the inserting direction, the baffle is separated from the CPA stop block when the secondary hook passes through the top of the secondary locking protrusion, and after the secondary hook passes through the secondary locking protrusion, the secondary hook is matched with the secondary locking protrusion in a locking manner.

Further, be provided with the elastic arm structure in the plug casing, elastic arm structure middle part set up the support with the plug casing is connected, the hasp setting is at elastic arm structure and socket casing matched with one end and with the cooperation of a lock stop platform locking once, and the other end of elastic arm structure is provided with can make a hasp perk and with the first pressing part of a lock stop platform unblock through pressing along perpendicular to grafting direction.

Furthermore, one end of the CPA locking piece facing the socket is provided with a guide post extending along the plugging direction, and the plug shell is provided with a guide rail matched with the guide post in a guiding way.

Furthermore, the end face of one end of the guide post facing the socket forms an inserting stop surface, and the inserting stop surface is in stop fit with one end of the elastic arm structure, which is far away from the primary lock catch, in the inserting direction, so that the inserting position of the CPA locking piece in the inserting direction is limited.

Further, a primary locking surface is arranged on the CPA locking piece, and when the CPA locking piece is positioned at the secondary locking position, the primary locking surface is in blocking fit with one surface, close to the plug shell, of the first pressing portion, so that the first pressing portion is prevented from being unexpectedly pressed to unlock.

Further, be provided with the second that can follow perpendicular to grafting direction and press down on the plug casing and press down the second and press down the bottom of orientation and be provided with the anticreep jack catch, be provided with the anticreep lug on the insertion path of anticreep jack catch in the socket casing, the one end that the anticreep lug faced the grafting direction has the inclined plane structure of guide anticreep jack catch according to preset path motion, behind the anticreep jack catch crossing the anticreep lug with anticreep lug stopping cooperation to prevent once hasp and once lock fender platform unblock back, the plug casing is unexpected to drop from the socket casing.

Further, in the process of loading the plug housing into the socket housing, the anti-falling claw and the anti-falling protrusion block are matched before the primary lock catch and the primary lock stop block are matched in a non-return mode, and after the primary lock catch and the primary lock stop block are matched in a non-return mode, the anti-falling claw is located at the front side of the anti-falling protrusion block in the plugging direction and has a preset gap with the anti-falling protrusion block.

Further, an anti-back hook is arranged at one end of the CPA locking piece facing the socket, and an anti-drop stop block which is in stop fit with the anti-back hook in the inserting direction is arranged on the socket shell so as to prevent the CPA locking piece from unexpected dropping from the socket shell.

Further, at least one terminal fixing sleeve is arranged in the socket shell, one end of the terminal fixing sleeve extends to the outside of the socket shell, a socket shielding sleeve is arranged between the terminal fixing sleeve and the socket shell, one end of the socket shielding sleeve, which faces towards the extending end of the terminal fixing sleeve, extends to the outside of the socket shell, and at least two elastic clamping pieces which are oppositely arranged and clamped on the outer side of the terminal fixing sleeve are formed.

Further, the elastic clamping piece is an elastic clamping piece formed by extending along the axial direction of the terminal fixing sleeve, and a containing groove matched with the shape of the elastic clamping piece is formed in the peripheral wall of the terminal fixing sleeve along the axial direction.

Further, the terminal fixing sleeve and the socket shell are integrally injection molded, and an avoidance groove for the elastic clamping piece to pass through during assembly is formed in the position of the socket shell corresponding to the elastic clamping piece.

Optionally, the wire body that public end terminal that sets up in the socket casing is the aluminium wire, and public end terminal is at the regional surface coating aluminum product of being connected with the aluminium wire, and the aluminium wire passes through ultrasonic welding to be connected with public end terminal, and female end terminal in the plug casing also accessible is connected the aluminium wire with public end terminal type mode to realize the connection of terminal and aluminium wire.

Optionally, the inner rubber core arranged in the plug can be integrally formed with the adaptive front cover, and the short circuit contact pin is implanted in the inner rubber core in the forming process, so that the front cover, the inner rubber core and the short circuit contact pin form an integral part, the assembly time is reduced, and the cost is reduced; the tail cover in the plug comprises a cover body and a wire sealing body, and the cover body and the wire sealing body can be integrally formed through a double-color forming process or a secondary injection molding process, so that the tail cover is an integral part, the assembly time is shortened, and the cost is reduced.

The technical scheme has the following beneficial effects: according to the technical scheme, the baffle used for limiting the preassembly insertion position is arranged on the locking part, the CPA baffle is correspondingly arranged in the plug housing in a matched mode, and when the CPA baffle is inserted in the preassembly insertion position, the preassembly insertion position of the locking part and the whole CPA locking piece can be limited through the interference of the baffle insertion motion of the CPA baffle, so that the preassembly insertion position limiting structure is simplified, the space of part of the plug housing is released, manufacturing materials are saved, the whole weight is lightened, the requirements of light weight and cost reduction are met, and in addition, the baffle of the technical scheme can be linked with the locking part, and the action process is compact and reliable.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is an exploded view of a plug;

FIG. 2 is an exploded view of the socket;

FIG. 3 is a schematic view of a socket housing;

fig. 4 is a cross-sectional view of the plug housing;

FIG. 5 is a schematic structural view of a CPA locking tab;

FIG. 6 is a schematic diagram of the state when the primary lock and the secondary lock are completed;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6;

FIG. 8 is a cross-sectional view taken along B-B in FIG. 6;

FIG. 9 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 10 is a schematic diagram of the state when both the primary lock and the secondary lock are completed;

FIG. 11 is a sectional view taken along the direction D-D in FIG. 10;

FIG. 12 is a sectional view taken along line E-E of FIG. 10;

FIG. 13 is a schematic view of the structure of the receptacle housing mounting flange end;

the figures are marked as follows:

1. a plug; 11. an inner rubber core; 111. a front cover; 12. a plug housing; 121. anti-falling clamping jaws; 122. primary locking; 123. an elastic arm structure; 124. a bracket; 125. CPA stop block; 126. a first pressing portion; 127. a guide rail; 128. an anti-drop stop; 129. a second pressing portion; 13. CPA locking piece; 131. a secondary hook; 132. a baffle; 133. a locking part; 134. a guide post; 135. a primary locking surface; 136. a plug-in stop surface; 137. anti-back hook; 138. a damping block; 14. a tail cover;

2. a socket; 21. a terminal fixing sleeve; 22. a socket housing; 221. a first locking and blocking table; 222. a secondary lock protrusion; 223. an anti-falling bump; 224. a guide plate; 225. a fixed flange; 226. sealing grooves; 23. a socket shielding sleeve; 231. an elastic card; 232. a receiving groove; 233. avoiding the groove.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

1-5, including plug 1 and socket 2 that the adaptation was pegged graft, plug 1 includes plug housing 12, socket 2 includes socket housing 22, on the plug housing 12 along its grafting direction cartridge have CPA locking piece 13, socket housing 22 is provided with primary lock catch platform 221 and secondary lock protruding 222 at interval in proper order towards the one end of grafting direction, be provided with in the plug housing 12 with primary lock catch platform 221 the primary hasp 122 of the non-return cooperation, primary lock catch platform 221 constitutes primary lock with primary hasp 122.

The CPA locking piece 13 extends a locking part 133 at the front end of the plug 1 in the plugging direction, a secondary hook 131 matched with the secondary locking protrusion 222 is arranged at the free end of the locking part 133, and the secondary hook 131 and the secondary locking protrusion 222 form a secondary lock; the blocking part 133 is provided with a baffle 132 perpendicular to the plugging direction, and the plug housing 12 is internally provided with a CPA stop 125 interfering with the baffle 132 on the plugging path of the CPA blocking piece 13, i.e. the CPA stop 125 has the expected function of blocking the movement of the baffle 132 along the plugging direction; specifically, the baffle 132 in this embodiment extends toward the center of the receptacle housing 22.

As shown in fig. 6-12, after the plug housing 12 and the socket housing 22 are plugged, the CPA locking piece 13 is located at the pre-installation position, the CPA stopper 125 can limit the insertion positions of the baffle 132 and the CPA locking piece 13, at this time, the CPA locking piece 13 is forced to move along the plugging direction, the secondary hook 131 is pushed by the secondary locking protrusion 222 to drive the locking portion 133 to elastically deform, and the CPA locking piece 13 is driven to move continuously until the secondary hook 131 passes through the top of the secondary locking protrusion 222, the baffle 132 is separated from the CPA stopper 125 due to the movement of the locking portion 133, that is, the baffle 132 passes over the CPA stopper 125, so that the movement path of the baffle 132 is not interfered any more by the CPA stopper 125, the blocking effect is not generated any more, the limitation of the pre-insertion position of the CPA locking piece 13 is released, and the CPA locking piece 13 can continue to move along the plugging direction; after the secondary hook 131 passes through the secondary locking protrusion 222, the secondary hook 131 is in locking engagement with the secondary locking protrusion 222, thereby realizing secondary locking.

The cooperation of CPA dog 125 and baffle 132 can realize the restriction to CPA locking piece 13 pre-installation inserted position, constitutes pre-installation inserted position limit structure, and more retrencies, saves manufacturing material and releases partial plug casing 12 space, and whole weight effectively lightens, satisfies lightweight, reduce cost's demand, and in addition, baffle 132 can link with locking part 133, and the course of action is compact reliable.

Further, as shown in fig. 3, the end surfaces of the primary locking stop 221 and the secondary locking protrusion 222 facing the plugging direction are both inclined structures which are beneficial to guiding the movement of the corresponding structures; as shown in fig. 5, the shutter 132 is integrally injection-molded with the locking portion 133.

Further, as shown in fig. 5 and 9, in terms of limiting the preassembly and extraction position of the CPA locking piece 13, an anti-back hook 137 is disposed at an end of the CPA locking piece 13 facing the socket 2, and an anti-drop stop 128 that is in stop fit with the anti-back hook 137 in the plugging direction is disposed on the socket housing 22, so as to prevent the CPA locking piece 13 from being undesirably dropped out of the socket housing 22, that is, the cooperation of the anti-back hook 137 and the anti-drop stop 128 can limit the preassembly and extraction position of the CPA locking piece 13, so as to form a preassembly and extraction position limiting structure of the CPA locking piece 13, and prevent the CPA locking piece 13 from being undesirably dropped out of the plug housing 12; specifically, in this embodiment, the anti-back hooks 137 are disposed on two sides of the CPA locking piece 13, in addition, in order to prevent the anti-back hooks 137 from being easily separated from the stop fit with the anti-drop stoppers 128 in the preassembly and extraction position, which causes failure of limiting the preassembly and extraction position, the CPA locking piece 13 is further provided with a damping block 138, the damping block 138 is disposed at intervals with the anti-back hooks 137, when the anti-back hooks 137 are about to be separated from the stop fit with the anti-drop stoppers 128, the damping block 138 can play a blocking effect on the anti-back hooks 137, and the anti-back hooks 137 can be moved beyond the anti-drop stoppers 128 after further pushing the damping block 138, thereby releasing the limiting state of the preassembly and extraction position, and further completely extracting the CPA locking piece 13 from the socket housing 22.

Further, as shown in fig. 4, in the aspect of unlocking the primary lock, an elastic arm structure 123 is disposed in the plug housing 12, a bracket 124 is disposed in the middle of the elastic arm structure 123 and connected to the plug housing 12, so that the elastic arm structure 123 forms a lever mechanism, the primary lock catch 122 is disposed at one end of the elastic arm structure 123 matched with the socket housing 22 and is in locking engagement with the primary locking stand 221, and a first pressing portion 126 capable of tilting the primary lock catch 122 and unlocking the primary locking stand 221 by pressing along a direction perpendicular to the plugging direction is disposed at the other end of the elastic arm structure 123.

Further, as shown in fig. 4, 5, 8 and 11, in defining the insertion position of the CPA locking piece 13 when the secondary lock is performed, a guide post 134 extending along the insertion direction is provided at one end of the CPA locking piece 13 facing the socket 2, a guide rail 127 in guide fit with the guide post 134 is provided on the plug housing 12, and the guide rail 127 guides and restricts the guide post 134 to reciprocate along the insertion direction; the end face of the guide post 134 facing the socket 2 forms a plugging stop surface 136, the plugging stop surface 136 is in blocking fit with one end of the elastic arm structure 123 away from the primary lock catch 122 in the plugging direction, so as to limit the plugging position of the CPA locking piece 13 in the plugging direction, namely, the plugging stop surface 136 is in blocking fit with one end of the elastic arm structure 123 away from the primary lock catch 122 to limit the final plugging position of the CPA locking piece 13 in secondary locking, so that poor secondary locking effect and even failure caused by excessive plugging of the CPA locking piece 13 in secondary locking are prevented, and in the state of secondary locking, the pulling-out limit of the CPA locking piece 13 is realized by the matching of the secondary hook 131 and the secondary locking protrusion 222; specifically, in the present embodiment, as shown in fig. 5 and 8, the guide post 134 has an L-shaped cross section in the plugging direction, and a portion near the center of the receptacle housing 22 is engaged with the guide rail 127.

Further, as shown in fig. 5, 7, 11 and 12, in terms of preventing the primary lock from being unlocked unexpectedly, the CPA locking piece 13 is provided with a primary locking surface 135, and when the CPA locking piece 13 is in the secondary locking position, the primary locking surface 135 is in blocking engagement with a surface of the first pressing portion 126 near the plug housing 12, so as to prevent the first pressing portion 126 from being unlocked by being pressed unexpectedly; specifically, in this embodiment, as shown in fig. 5, a portion of the guide post 134 near the center of the socket housing 22 extends in the plugging direction, and the primary locking surface is an end surface of the extending portion of the guide post 134 facing the first pressing portion 126.

Further, as shown in fig. 3, 4 and 6, in the aspect of preventing the plug housing 12 from being undesirably removed from the socket housing 22 after the primary lock catch 122 is unlocked from the primary lock stop 221, a second pressing portion 129 capable of being pressed downward along a direction perpendicular to the plugging direction is provided on the plug housing 12, a disengagement preventing claw 121 is provided at the bottom of the pressing direction of the second pressing portion 129, a disengagement preventing projection 223 is provided in the socket housing 22 on an insertion path of the disengagement preventing claw 121, the disengagement preventing claw 121 is in an L-shaped structure which is suspended and functionally adapted to the disengagement preventing projection 223, one end of the disengagement preventing projection 223 facing the plugging direction has a slope structure for guiding the disengagement preventing claw 121 to move according to a preset path, and when the plug housing 12 is inserted into the socket housing 22, the disengagement preventing the plug housing 12 from being undesirably removed from the socket housing 22 after the primary lock catch 122 is unlocked from the primary lock stop 221; specifically, in this embodiment, two side-by-side guide plates 224 are disposed on the socket housing 22, the primary locking stand 221 and the secondary locking protrusion 222 are located between the two guide plates 224, the anti-falling protrusion 223 is disposed two and is located on two opposite vertical surfaces of the two guide plates 224, the anti-falling claw 121 is correspondingly disposed two, and the anti-falling claw 121 is guided by the anti-falling protrusion 223 during insertion and elastically deviates in a direction close to the socket housing 22 until the anti-falling claw 121 returns to the original position and is in stop fit with the anti-falling protrusion 223 when passing over the anti-falling protrusion 223.

Further, as shown in fig. 7, in enhancing the above-mentioned unexpected drop-out prevention effect, in the process of loading the plug housing 12 into the receptacle housing 22, the stop-fit of the drop-out preventing claw 121 and the drop-out preventing projection 223 occurs before the stop-fit of the primary lock catch 122 and the primary lock stop 221, and after the stop-fit of the primary lock catch 122 and the primary lock stop 221 is completed, the drop-out preventing claw 121 is located at the front side of the drop-out preventing projection 223 in the plugging direction and has a predetermined gap with the drop-out preventing projection 223, that is, when the stop-out fit of the primary lock catch 122 and the primary lock stop 221 is completed to realize the primary lock, the gap is provided between the drop-out preventing claw 121 and the corresponding drop-out preventing projection 223, which can further enhance the effect of preventing the unexpected drop-out, and also facilitate the operation when the plug housing 12 is expected to drop out from the receptacle housing 22 after the primary lock catch 122 and the primary lock stop 221 are unlocked.

Further, as shown in fig. 6 and 10, in order to facilitate recognition of the pressing and sequential operations, the first pressing portion 126 and the second pressing portion 129 are provided with sequential labels, such as 1, 2 of arabic numerals, or i, ii of roman numerals, or one, two of kanji numerals, or other labels that can facilitate recognition of the operation sequence, and 1, 2 of arabic numerals are used in this embodiment.

Further, as shown in fig. 2, 7 and 13, in adapting to a wire body with a larger wire diameter, at least one terminal fixing sleeve 21 is installed inside the socket housing 22, one end of the terminal fixing sleeve 21 extends to the outside of the socket housing 22, a socket shielding sleeve 23 is arranged between the terminal fixing sleeve 21 and the socket housing 22, one end of the socket shielding sleeve 23, which faces the extending end of the terminal fixing sleeve 21, extends to the outside of the socket housing 22, and at least two elastic clamping pieces which are oppositely arranged and clamped at the outer side of the terminal fixing sleeve 21 are formed; a fixed flange 225 is arranged at one end of the socket shell 22 corresponding to the elastic clamping piece, a sealing groove 226 surrounding the periphery of the terminal fixing sleeve 21 is arranged on the end surface of the fixed flange 225, and the distance between the outer wall of the terminal fixing sleeve 21 and the inner side wall of the sealing groove 226 is 1-6mm; thus, when other parts of the socket housing 22 are unchanged, the external dimensions of the terminal fixing sleeve 21 are increased and the thickness is reduced so as to be capable of accommodating a wire body with a larger wire diameter, the clamping of the elastic clamping member can assist in reinforcing the terminal fixing sleeve 21, and the damage resistance of the terminal fixing sleeve 21 is improved; specifically, the number of the terminal fixing sleeves 21 in this embodiment is four, and the number of the elastic clamping members on the socket shielding sleeve 23 is two by two, and the distance h between the outer wall of the terminal fixing sleeve 21 and the inner wall of the sealing groove 226 is at least 1mm.

Further, as shown in fig. 2, the elastic clamping member is an elastic card 231 formed by extending along the axial direction of the terminal fixing sleeve 21, the elastic card 231 and the socket shielding sleeve 23 are integrally stamped by a plate, and a containing groove 232 matched with the shape of the elastic card 231 is formed on the outer peripheral wall of the terminal fixing sleeve 21 along the axial direction.

Further, as shown in fig. 7 and 13, the terminal fixing sleeve 21 and the socket housing 22 are integrally injection molded, and a recess 233 is formed at a position of the socket housing 22 corresponding to the elastic clamping member for the elastic clamping member to pass through during assembly.

Optionally, the wire body connected with the male terminal set in the socket housing 22 is an aluminum wire, the surface of the area connected with the aluminum wire is coated with the aluminum wire, the aluminum wire is connected with the male terminal through ultrasonic welding, and the female terminal in the plug housing 12 can also be connected with the aluminum wire in a similar manner to the male terminal, so that the connection between the terminal and the aluminum wire is realized.

Alternatively, the inner rubber core 11 may be integrally formed with the front cover 111, and the shorting pin is implanted into the inner rubber core 11 during forming, so that the front cover 111, the inner rubber core 11 and the shorting pin form an integral part, thereby reducing assembly time and cost; the tail cover 14 comprises a cover body and a wire sealing body, and the cover body and the wire sealing body can be integrally formed through a double-color forming process or a secondary injection molding process, so that the tail cover 14 is an integral part, the assembly time is shortened, and the cost is reduced.

The following describes in detail the operation procedures of the primary lock, the secondary lock, the unlocking, and the like of the high-voltage connector with the secondary lock.

S1, inserting and locking once.

Correspondingly plugging the plug shell 12 with the socket shell 22, when the anti-falling claw 121 on the plug shell 12 moves to the anti-falling lug 223, continuously pushing the plug shell 12 to plug, elastically deforming the anti-falling claw 121 under the guide of the anti-falling lug 223 and crossing the anti-falling lug 223, and then continuously plugging the plug shell 12 until the primary lock catch 122 is in stop fit with the primary lock stop 221, so as to realize primary lock; at this time, a gap is formed between the anti-drop claw 121 and the anti-drop projection 223, the CPA locking piece 13 is at the pre-installation position, the cooperation of the CPA stopper 125 and the baffle 132 defines the pre-installation insertion position of the CPA locking piece 13, and the cooperation of the anti-drop hook 137 and the anti-drop stopper 128 defines the pre-installation extraction position of the CPA locking piece 13.

S2, secondary locking.

The CPA locking piece 13 is pushed by force to be inserted, the secondary hook 131 is pushed by the secondary locking bulge 222 to drive the locking part 133 to elastically deform, the CPA locking piece 13 is driven to move continuously until the secondary hook 131 passes through the top of the secondary locking bulge 222, the baffle 132 is separated from the interference state with the CPA stop block 125 due to the movement of the locking part 133, the CPA locking piece 13 continues to move along the inserting direction, and after the secondary hook 131 passes through the secondary locking bulge 222, the secondary hook 131 is matched with the secondary locking bulge 222 in a locking way, so that secondary locking is realized; at this time, the insertion stop surface 136 on the guide post 134 is in stop fit with one end of the elastic arm structure 123 away from the primary lock catch 122, so as to prevent the CPA locking piece 13 from being inserted continuously, the CPA locking piece 13 is also stopped under the action of the secondary hook 131, and the primary locking surface 135 on the CPA locking piece 13 blocks the first pressing portion 126 from being pressed to move, so that the first pressing portion 126 is prevented from being unexpectedly pressed to cause primary lock unlocking.

S3, unlocking the secondary lock.

The CPA locking piece 13 is pulled back by force, the secondary hook 131 is forced to retract and pass through the secondary locking protrusion 222, the locking part 133 is elastically deformed, the baffle 132 is retracted to a position in which the baffle 132 is in interference state with the CPA stop 125 again due to the movement of the locking part 133, the CPA locking piece 13 is retracted integrally until the anti-back hook 137 is in blocking fit with the anti-drop stop 128, at this time, the CPA locking piece 13 is restored to the pre-installation position, and the primary locking surface 135 on the CPA locking piece 13 does not block the first pressing part 126 any more.

And S3, unlocking the primary lock and releasing the plug-in mounting.

Pressing the first pressing portion 126 to tilt the primary lock catch 122 and disengage from the primary lock catch 221, and pulling the plug housing 12 back, wherein the primary lock is unlocked, but the plug 1 and the socket 2 are not released from the insertion; when the anti-falling claw 121 contacts with the anti-falling protrusion 223 and the anti-falling matching occurs, the second pressing part 129 is pressed, so that the anti-falling claw 121 passes over the anti-falling protrusion 223 under the active elastic deformation, and the plug housing 12 is continuously pulled back, so that the plug-in mounting of the plug 1 and the socket 2 can be released.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (11)

1. The utility model provides a high voltage connector with secondary lock, plug (1) and socket (2) including the adaptation grafting, plug (1) include plug housing (12), socket (2) include socket housing (22), along its grafting direction cartridge on plug housing (12) have CPA locking piece (13), socket housing (22) are provided with once lock fender platform (221) and secondary lock protruding (222) towards the one end of grafting direction interval in proper order, be provided with in plug housing (12) with once lock fender platform (221) non-return complex hasp (122), its characterized in that: the CPA locking piece (13) extends at the front end of the plug (1) in the plugging direction and is provided with a locking part (133), the free end of the locking part (133) is provided with a secondary hook (131) matched with a secondary locking protrusion (222), the locking part (133) is provided with a baffle (132) perpendicular to the plugging direction, a CPA stop block (125) interfering with the baffle (132) is arranged on the plugging path of the CPA locking piece (13) in the plug shell (12), after the plug shell (12) is plugged with the socket shell (22), the CPA locking piece (13) is driven to move along the plugging direction, the baffle (132) is separated from the CPA stop block (125) when the secondary hook (131) passes through the top of the secondary locking protrusion (222), and after the secondary hook (131) passes through the secondary locking protrusion (222), the locking matching of the secondary hook (131) and the secondary locking protrusion (222) is realized.

2. A high voltage connector with secondary lock as claimed in claim 1, wherein: be provided with elastic arm structure (123) in plug casing (12), elastic arm structure (123) middle part set up support (124) with plug casing (12) are connected, primary lock catch (122) set up at elastic arm structure (123) and socket casing (22) matched with one end and with primary lock catch platform (221) locking cooperation, the other end of elastic arm structure (123) is provided with can make primary lock catch (122) perk and with primary lock catch platform (221) unblock first pressing part (126) through pressing along perpendicular to grafting direction.

3. A high voltage connector with secondary lock as claimed in claim 2, wherein: one end of the CPA locking piece (13) facing the socket (2) is provided with a guide post (134) extending along the plugging direction, and the plug shell (12) is provided with a guide rail (127) in guide fit with the guide post (134).

4. A high voltage connector with secondary lock as claimed in claim 3, wherein: the end face of one end of the guide post (134) facing the socket (2) forms an inserting stop surface (136), and the inserting stop surface (136) is in stop fit with one end of the elastic arm structure (123) away from the primary lock catch (122) in an inserting direction, so that the inserting position of the CPA locking piece (13) in the inserting direction is limited.

5. A high voltage connector with secondary lock as claimed in claim 2, wherein: the CPA locking piece (13) is provided with a primary locking surface (135), and when the CPA locking piece (13) is positioned at the secondary locking position, the primary locking surface (135) is in blocking fit with one surface of the first pressing part (126) close to the plug shell (12), so that the first pressing part (126) is blocked from being unlocked by unexpected pressing.

6. A high voltage connector with secondary lock as claimed in claim 1, wherein: the plug housing (12) is provided with a second pressing part (129) which can be pressed downwards along a direction perpendicular to the plugging direction, the bottom of the pressing direction of the second pressing part (129) is provided with an anti-falling claw (121), an anti-falling lug (223) is arranged on the insertion path of the anti-falling claw (121) in the socket housing (22), one end of the anti-falling lug (223) facing the plugging direction is provided with an inclined surface structure for guiding the anti-falling claw (121) to move according to a preset path, and the anti-falling claw (121) is matched with the anti-falling lug (223) in a stopping way after passing over the anti-falling lug (223) so as to prevent the plug housing (12) from unexpected falling off from the socket housing (22) after the primary lock catch (122) and the primary lock catch table (221) are unlocked.

7. A high voltage connector with secondary lock as defined in claim 6, wherein: in the process of loading the plug shell (12) into the socket shell (22), the stop matching of the anti-falling claw (121) and the anti-falling lug (223) occurs before the stop matching of the primary lock catch (122) and the primary lock stop (221), and after the stop matching of the primary lock catch (122) and the primary lock stop (221) is completed, the anti-falling claw (121) is positioned at the front side of the anti-falling lug (223) in the plugging direction and has a preset gap with the anti-falling lug (223).

8. A high voltage connector with secondary lock as claimed in claim 1, wherein: one end of the CPA locking piece (13) facing the socket (2) is provided with an anti-back hook (137), and the socket shell (22) is provided with an anti-drop stop block (128) which is in stop fit with the anti-back hook (137) in the plugging direction so as to prevent the CPA locking piece (13) from unexpected dropping from the socket shell (22).

9. A high voltage connector with secondary lock as claimed in claim 1, wherein: the socket is characterized in that at least one terminal fixing sleeve (21) is arranged in the socket shell (22), one end of the terminal fixing sleeve (21) extends to the outside of the socket shell (22), a socket shielding sleeve (23) is arranged between the terminal fixing sleeve (21) and the socket shell (22), one end of the socket shielding sleeve (23) extending towards the terminal fixing sleeve (21) extends to the outside of the socket shell (22), and at least two elastic clamping pieces which are oppositely arranged and clamped at the outer side of the terminal fixing sleeve (21) are formed.

10. A high voltage connector with secondary lock as claimed in claim 9, wherein: the elastic clamping piece is an elastic clamping piece (231) formed by extending along the axial direction of the terminal fixing sleeve (21), and a containing groove (232) matched with the shape of the elastic clamping piece (231) is formed in the peripheral wall of the terminal fixing sleeve (21) along the axial direction.

11. A high voltage connector with secondary lock as claimed in claim 9, wherein: the terminal fixing sleeve (21) and the socket shell (22) are integrally injection molded, and an avoidance groove (233) for the elastic clamping piece to pass through during assembly is formed in the position of the socket shell (22) corresponding to the elastic clamping piece.