CN210516637U - Contact structure of high-voltage direct-current relay - Google Patents
Contact structure of high-voltage direct-current relay Download PDFInfo
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- CN210516637U CN210516637U CN201921623530.6U CN201921623530U CN210516637U CN 210516637 U CN210516637 U CN 210516637U CN 201921623530 U CN201921623530 U CN 201921623530U CN 210516637 U CN210516637 U CN 210516637U
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Abstract
The utility model discloses a contact structure of a high-voltage direct-current relay, which comprises a fixed contact, a moving contact arranged vertically and oppositely with the fixed contact, a contact spring sleeved on a push rod and capable of applying upward elastic supporting force to the moving contact, an upper magnetic yoke arranged on the upper side of the moving contact, a lower magnetic yoke arranged between the lower side of the moving contact and the upper end of the contact spring, and an adjusting and limiting component which is arranged on the push rod and can move along with the upper magnetic yoke, wherein the moving contact can be communicated or disconnected with the fixed contact, and the adjusting and limiting component is also connected with the upper magnetic; when the moving contact is communicated with the static contact and the push rod continues to move upwards for a certain distance, the adjusting limiting component can act on the upper magnetic yoke or can act on the upper magnetic yoke together with the push rod in a synergistic mannerThe yoke to make the upper yoke stop in preset position, and the interval L between upper yoke downside and the lower yoke upside satisfies the relational expression: l < L0，L0Is the overtravel distance; therefore, the action that the moving contact is separated from the static contact can be effectively limited, and the quality of a relay product is ensured.
Description
Technical Field
The utility model relates to a direct current relay technical field specifically provides a high voltage direct current relay's contact structure.
Background
When the relay passes through current, due to the electromagnetic action, electric repulsion force is generated on the movable contact piece, the direction of the electric repulsion force is opposite to the direction of the force applied to the movable contact piece by the driving spring, so that the movable contact piece generates a movement trend separated from the static contact, if the current flowing through the relay is large, the movable contact piece is separated from the static contact, short-circuit electric arcs are generated between the movable contact piece and the static contact, and the product failure is caused.
In order to solve the technical problem, a manufacturer carries out technical improvement on a relay product, and the method specifically comprises the following steps: an upper yoke is disposed on the upper side of the movable contact piece, and a lower yoke capable of surrounding the lower side and the side portion of the movable contact piece is also disposed on the movable contact piece. By providing the upper yoke and the lower yoke, when the movable contact piece is in contact with the stationary contact point and a current flows in parallel, a magnetic force of mutual attraction is generated between the upper yoke and the lower yoke, and the movable contact piece is pressed by the stationary contact point due to the magnetic force of mutual attraction, and the movement of the movable contact piece to be separated from the stationary contact point is restricted.
However, the above improvements have some disadvantages in application, such as: in the above-mentioned improvement scheme, because of the relative push rod of upper yoke is fixed, the relative movable contact piece of lower yoke is fixed, so at initial stage, the distance between upper yoke and the lower yoke approaches to zero (nevertheless there is the clearance), and when moving contact piece and static contact point contact back, movable contact piece and lower yoke can be for static contact point stop motion like this, but upper yoke and push rod can continue upward movement this moment, until moving iron core and static magnetic pole plate contact, the distance between upper yoke and the lower yoke is the overstroke of product this moment. According to the electromagnetic principle, the current flowing through the movable contact piece can generate the mutually-attracted magnetic force between the upper magnetic yoke and the lower magnetic yoke, and the mutually-attracted magnetic force can be reduced along with the increase of the distance between the upper magnetic yoke and the lower magnetic yoke. In the relay with a large overtravel, when the movable contact piece passes through the current, the attraction force generated by the upper magnetic yoke and the lower magnetic yoke is small, so that the effect of separating from the static contact point when the brake limiting contact piece is electrified is small, and the bad phenomena that the movable contact piece is separated from the static contact point and short-circuit electric arcs are generated between the movable contact piece and the static contact point are easy to occur.
In view of this, the present invention is especially provided.
Disclosure of Invention
In order to overcome the defects, the utility model provides a high-voltage direct-current relay's contact structure, it can restrict effectively the moving contact will with the action of static contact separation has ensured relay product quality.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: a contact structure of a high-voltage direct-current relay comprises a fixed contact, a moving contact and a contact spring, wherein the moving contact is vertically arranged opposite to the fixed contact, the contact spring is sleeved on a push rod of the high-voltage direct-current relay and can apply upward elastic supporting force to the moving contact, and the moving contact can move up and down relative to the fixed contact under the driving of the push rod so as to realize the communication or disconnection between the moving contact and the fixed contact; the upper magnetic yoke is arranged on the upper side of the moving contact, the lower magnetic yoke is arranged between the lower side of the moving contact and the upper end of the contact spring, the adjusting and limiting assembly is arranged on the push rod and can move along with the push rod, and the adjusting and limiting assembly is also connected with the upper magnetic yoke;
when the moving contact is connected with the fixed contactLead to, just when the push rod continues to move up a certain distance, adjust spacing subassembly and can act on go up the yoke, perhaps adjust spacing subassembly and can with the push rod is in coordination with go up the yoke, so that go up the yoke and stop at preset position, then go up the yoke downside with interval L between the lower yoke upside still satisfies the relational expression: l < L0(ii) a L in the formula0The overtravel distance of the high-voltage direct-current relay.
As a further improvement of the present invention, the adjusting and limiting assembly has a positioning member and a first resilient member, the positioning member is positioned and mounted on the push rod, and the positioning member is further elastically connected to the upper side of the upper magnetic yoke through the first resilient member; when the moving contact is communicated with the fixed contact and the push rod continues to move upwards for a certain distance, the upper magnetic yoke can stop at a preset position under the synergistic action of the positioning piece and the first return elastic piece, and the distance L between the lower side of the upper magnetic yoke and the upper side of the lower magnetic yoke meets the relation: l < L0；
Or, the upper magnetic yoke can stay at a preset position under the synergistic action of the first return elastic piece and the push rod, and the distance L between the lower side of the upper magnetic yoke and the upper side of the lower magnetic yoke satisfies a relational expression: l < L0。
As a further improvement of the present invention, there are two static contacts, and the two static contacts are arranged side by side; the moving contact is of a long strip plate-shaped structure, and the length direction of the moving contact is consistent with the central connecting line direction of the two fixed contacts;
the upper magnetic yoke is of a square flat structure and is freely placed in the middle of the upper side surface of the movable contact; the lower magnetic yoke is of a long-strip U-shaped groove structure extending along the length direction of the movable contact, the notch of the lower magnetic yoke faces upwards, and the lower magnetic yoke is freely sleeved at the middle part of the lower side surface of the movable contact and the middle parts of two long side vertical walls of the movable contact;
the push rod is vertically arranged, a supporting seat is arranged at the upper shaft end of the push rod in a positioning mode, the lower end of the contact spring is sleeved on the supporting seat in a positioning mode, and the upper end of the contact spring is elastically abutted to the outer wall of the bottom of the lower magnetic yoke to apply upward elastic supporting force to the lower magnetic yoke.
As a further improvement of the present invention, the positioning member has a positioning bracket and at least two connecting rods, the positioning bracket has a bracket main body in an inverted U shape, the bracket main body is covered outside the upper magnetic yoke, the two side vertical walls of the bracket main body respectively extend downwards to the side of the supporting seat, and a pair of limiting hooks is relatively arranged on the inner surfaces of the two side vertical walls of the bracket main body; one ends of the at least two connecting rods are respectively embedded in the supporting seat, and the other ends of the at least two connecting rods are respectively correspondingly positioned and connected with the vertical walls on the two sides of the bracket main body;
the first return elastic piece is installed between the inner surface of the top wall of the support body and the upper side face of the upper magnetic yoke, and when the moving contacts are respectively communicated with the two fixed contacts and the push rod continues to move upwards for a certain distance, the first return elastic piece can cooperate with the pair of limiting hooks, so that the upper magnetic yoke stays at a preset position.
As a further improvement of the utility model, realize first resilience elastic component install in the roof internal surface of support main part with go up the structure between the side of going up of yoke does: the inner surface of the top wall of the bracket main body is provided with a mounting block in a downward protruding manner, and the upper side surface of the upper magnetic yoke is provided with a mounting groove matched with the mounting block in a downward recessed manner; the first restoring elastic piece is a spring and is sleeved on the mounting block, and meanwhile the bottom end of the first restoring elastic piece is elastically abutted against the inner wall of the bottom of the mounting groove.
As a further improvement of the present invention, there are two static contacts, and the two static contacts are arranged side by side; the moving contact is of a long strip plate-shaped structure, and the length direction of the moving contact is consistent with the central connecting line direction of the two fixed contacts;
the upper magnetic yoke is of an inverted U-shaped groove body structure, and the upper magnetic yoke is freely covered on the middle part of the upper side surface of the moving contact and the upper section parts of the middle parts of the two long side vertical walls of the moving contact; the lower magnetic yoke is of a U-shaped groove body structure and is freely sleeved on the middle part of the lower side surface of the moving contact and the lower section parts of the middle parts of the two long side vertical walls of the moving contact;
the push rod is vertically arranged, the upper shaft end of the push rod sequentially and movably penetrates through the lower magnetic yoke, the moving contact and the upper magnetic yoke, and a supporting ring is further positioned and sleeved on the push rod; the contact spring is sleeved on the push rod, the lower end of the contact spring is elastically abutted to the support ring, and the upper end of the contact spring is elastically abutted to the outer wall of the bottom of the lower magnetic yoke so as to apply upward elastic supporting force to the lower magnetic yoke.
As a further improvement of the utility model, the positioning member has a positioning sleeve which is annular and is positioned and sleeved on the upper shaft end of the push rod, and a stop edge which extends outwards from the upper shaft end surface of the positioning sleeve in the radial direction;
the first return elastic piece is a spring and is sleeved on the positioning shaft sleeve, and the upper end and the lower end of the first return elastic piece are respectively and correspondingly elastically abutted against the stop edge and the upper side face of the upper magnetic yoke;
in addition, a limiting step is arranged on the push rod and below the top wall of the upper magnetic yoke, and when the moving contact is respectively communicated with the two fixed contacts and the push rod continues to move upwards for a certain distance, the limiting step can cooperate with the first return elastic piece to enable the upper magnetic yoke to stop at a preset position.
As a further improvement, the adjusting limiting component has one and the adjusting part of the upper magnetic yoke positioning connection, one install in the elastic component is replied to the second on the adjusting part and one with the restriction piece of push rod positioning connection, works as the moving contact with when the static contact breaks off, the restriction piece can act on the elastic component is replied to the second, so that the second is replied the elastic component and is in deformation state and make transfer the elastic componentThe joint part is in a fixed state relative to the push rod; and when the moving contact is communicated with the fixed contact and the push rod continues to move upwards for a certain distance, the second restoring elastic part can be partially separated from the limiting part and restored to a non-deformation state, and then the second restoring elastic part can cooperate with the limiting part to drive the adjusting part and the upper magnetic yoke to move downwards together and stop at a preset position, and the distance L between the lower side of the upper magnetic yoke and the upper side of the lower magnetic yoke also satisfies the relation: l < L0。
As a further improvement of the present invention, there are two static contacts, and the two static contacts are arranged side by side; the moving contact is of a long strip plate-shaped structure, and the length direction of the moving contact is consistent with the central connecting line direction of the two fixed contacts;
the upper magnetic yoke is of a square flat structure and is freely placed in the middle of the upper side surface of the movable contact; the lower magnetic yoke is of a long-strip U-shaped groove structure extending along the length direction of the movable contact, the notch of the lower magnetic yoke faces upwards, and the lower magnetic yoke is freely sleeved at the middle part of the lower side surface of the movable contact and the middle parts of two long side vertical walls of the movable contact;
the push rod is vertically arranged, a supporting seat is arranged at the upper shaft end of the push rod in a positioning mode, the lower end of the contact spring is sleeved on the supporting seat in a positioning mode, and the upper end of the contact spring is elastically abutted to the outer wall of the bottom of the lower magnetic yoke to apply upward elastic supporting force to the lower magnetic yoke.
As a further improvement of the present invention, the adjusting member has a bracket main body in an inverted U shape, the bracket main body is covered outside the upper magnetic yoke, and the top wall of the bracket main body is also fixedly connected with the upper magnetic yoke, in addition, the two side vertical walls of the bracket main body also extend downwards to the side of the supporting seat respectively, and the bottoms of the two side vertical walls of the bracket main body are respectively provided with an inverted U-shaped notch;
the number of the second restoring elastic pieces is two, and the two second restoring elastic pieces are both of a spring plate structure and are correspondingly arranged in the two inverted U-shaped gaps respectively;
the two limiting parts are of U-shaped rod structures which are transversely arranged and are respectively correspondingly positioned and installed on two opposite sides of the supporting seat;
when the moving contact is disconnected with the two fixed contacts respectively, the two limiting parts can be correspondingly pressed against the two second restoring elastic parts, so that the two second restoring elastic parts are in a deformation state and the adjusting part is in a fixed state relative to the push rod; when the moving contact is communicated with the two fixed contacts respectively and the push rod continues to move upwards for a certain distance, the two second restoring elastic pieces are partially separated from the two limiting pieces correspondingly respectively and respectively move upwards in a restoring mode until the second restoring elastic pieces are elastically abutted to the top walls of the two inverted U-shaped gaps, in the restoring moving process of the two second restoring elastic pieces, the two second restoring elastic pieces can generate upward acting force on the two limiting pieces, correspondingly, the two limiting pieces can generate downward reacting force on the adjusting piece, and therefore the adjusting piece and the upper magnet yoke are driven to move downwards together and stay at a preset position.
The utility model has the advantages that: compared with the prior art, the utility model discloses improve high-voltage direct-current relay's contact structure, add an upper yoke of arranging on the moving contact upside, a lower yoke of arranging between the moving contact downside and the contact spring upper end and an adjust spacing subassembly of installing on the push rod and still being connected with the upper yoke, so when the moving contact is linked together with the static contact, and the push rod continues to move up a certain distance (i.e. overtravel distance), adjust spacing subassembly can act on the upper yoke, perhaps adjust spacing subassembly can cooperate with the push rod to act on the upper yoke together, so that the upper yoke stops at preset position, and make simultaneously the interval between the upper yoke downside and the lower yoke upside far less than this high-voltage direct-current relay's overtravel distance, in addition, in the movement process of the push rod, the relative position of the upper magnetic yoke and the push rod is variable within a certain travel range, so that when the moving contact passes through current, the mutual attraction magnetic force generated between the upper magnetic yoke and the lower magnetic yoke is large, the movement of the moving contact to be separated from the fixed contact can be effectively limited, and the quality of a relay product is ensured.
Drawings
Fig. 1 is a schematic view of a first view angle cross-sectional structure of a high-voltage direct-current relay in a disconnected operating state according to a first embodiment of the present invention;
fig. 2 is a schematic view of a second view angle cross-sectional structure of the high-voltage direct-current relay in a disconnected operating state according to the first embodiment of the present invention;
FIG. 3 is an enlarged view of the portion A shown in FIG. 2;
fig. 4 is a schematic view of a first view angle cross-sectional structure of the high-voltage direct-current relay in a closed operating state according to the first embodiment of the present invention;
fig. 5 is a schematic view of a second view angle cross-sectional structure of the high-voltage direct-current relay in a closed working state according to the first embodiment of the present invention;
FIG. 6 is an enlarged view of the portion B shown in FIG. 5;
fig. 7 is a schematic view of a first view angle cross-sectional structure of the high-voltage dc relay in a disconnected operating state according to the second embodiment of the present invention;
fig. 8 is a schematic view of a second view angle cross-sectional structure of the high-voltage dc relay in a disconnected operating state according to the second embodiment of the present invention;
FIG. 9 is an enlarged schematic view of the portion C shown in FIG. 8;
fig. 10 is a schematic view of a first view angle cross-sectional structure of the high-voltage dc relay in a closed operating state according to the second embodiment of the present invention;
fig. 11 is a schematic view of a second view angle cross-sectional structure of the high-voltage dc relay in a closed operating state according to the second embodiment of the present invention;
FIG. 12 is an enlarged view of the portion D shown in FIG. 11;
fig. 13 is a schematic view of a first view angle cross-sectional structure of the high-voltage dc relay in a disconnected operating state according to the third embodiment of the present invention;
fig. 14 is a schematic view of a second view angle cross-sectional structure of the high-voltage dc relay in the off state according to the third embodiment of the present invention;
FIG. 15 is an enlarged view of section E of FIG. 14;
fig. 16 is a schematic view of a first view angle cross-sectional structure of the high-voltage dc relay in a closed operating state according to the third embodiment of the present invention;
fig. 17 is a schematic view of a second view angle cross-sectional structure of the high-voltage dc relay in a closed operating state according to the third embodiment of the present invention;
fig. 18 is an enlarged schematic view of the portion F shown in fig. 17.
The following description is made with reference to the accompanying drawings:
10-static contact 11-moving contact 12-contact spring
13-upper magnetic yoke 130-mounting groove 14-lower magnetic yoke
15-positioning piece 150-positioning support 1500-support main body
1501 mounting block 1502 limiting hook 151 connecting rod
152-positioning sleeve 153-stop edge 16-first resilient element
17-adjusting member 18-second resilient member 19-limiting member
2-push rod 20-limit step 3-support seat 4-support ring
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the disclosure herein.
It should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relation or adjustment of the size should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the function and the achievable purpose of the present invention. The terms "first" and "second" used in the present specification are used for convenience of description and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The utility model provides a high-voltage direct-current relay's contact structure, including static contact 10, with the static contact 10 along vertical relative arrangement's moving contact 11, and cup joint on this high-voltage direct-current relay's push rod 2 and can apply the contact spring 12 of upward elastic support power to the moving contact 11, the moving contact 11 can also be in the push rod 2 drive down relative to the static contact 10 reciprocates to realize the moving contact 11 with static contact 10 is linked together or is disconnected; particularly, the device also comprises an upper magnetic yoke 13, a lower magnetic yoke 14 and an adjusting and limiting assembly, wherein the upper magnetic yoke 13 is arranged on the upper side of the moving contact 11, the lower magnetic yoke 14 is arranged between the lower side of the moving contact 11 and the upper end of the contact spring 12, the adjusting and limiting assembly is arranged on the push rod 2 and can move along with the push rod, and the adjusting and limiting assembly is also connected with the upper magnetic yoke 13; when the moving contact 11 is communicated with the fixed contact 10 and the push rod 2 continues to move upward for a certain distance (i.e. over-travel distance), the adjusting limiting component can act on the upper magnetic yoke 13, or the adjusting limiting component can cooperate with the push rod 2 to act on the upper magnetic yoke 13, so that the upper magnetic yoke 13 stays at a preset position, and then the distance L between the lower side of the upper magnetic yoke 13 and the upper side of the lower magnetic yoke 14 further satisfies the relational expression: l < L0L in the formula0Is the overtravel distance of the high-voltage direct-current relaySpecifically, the distance between the lower side of the upper magnetic yoke 13 and the upper side of the lower magnetic yoke 14 is the difference between the over-travel distance of the high-voltage direct-current relay and the movement distance of the upper magnetic yoke 13; thus, when the movable contact 11 passes through a current, the magnetic force of the mutual attraction generated between the upper magnetic yoke 13 and the lower magnetic yoke 14 is relatively large (compared with the fixed structure of the upper magnetic yoke 13 in the prior art), so that the movement that the movable contact is separated from the fixed contact can be effectively limited.
In order to understand the specific structure, the connection relationship and the action relationship of the "upper yoke 13, the lower yoke 14 and the adjusting and limiting assembly" in the contact structure of the present invention in detail, three embodiments are listed below for explanation, which are:
example 1:
please refer to fig. 1 to fig. 6, which are schematic diagrams of a cross-sectional structure and a partially enlarged structure of two different viewing angles of the high-voltage direct-current relay in an off operating state, and schematic diagrams of a cross-sectional structure and a partially enlarged structure of two different viewing angles of the high-voltage direct-current relay in a closed operating state according to a first embodiment of the present invention.
In this embodiment, there are two fixed contacts 10, and the two fixed contacts 10 are arranged side by side; the moving contact 11 is of a long strip plate-shaped structure, and the length direction of the moving contact 11 is consistent with the direction of a central connecting line of the two fixed contacts 10;
the upper magnetic yoke 13 is of a square flat plate structure and is freely placed in the middle of the upper side surface of the moving contact 11; the lower magnetic yoke 14 is a long-strip U-shaped groove structure extending along the length direction of the movable contact 11, the notch of the lower magnetic yoke 14 faces upwards, and the lower magnetic yoke 14 is freely sleeved at the middle part of the lower side surface of the movable contact 11 and the middle parts of two long side vertical walls of the movable contact 11;
the push rod 2 is vertically arranged, a supporting seat 3 made of a plastic material is positioned and arranged at the upper shaft end of the push rod 2, the lower end of the contact spring 12 is positioned and sleeved on the supporting seat 3, and the upper end of the contact spring 12 is elastically abutted against the outer wall of the bottom of the lower magnetic yoke 14 so as to apply upward elastic supporting force to the lower magnetic yoke 14; supplementary notes in addition: when the movable contacts 11 are disconnected from the two fixed contacts 10, respectively, the contact springs 12 can make the notches of the lower magnetic yoke 14 contact with the lower side surface of the upper magnetic yoke 13, and of course, tolerance gaps may exist;
the adjusting and limiting assembly is provided with a positioning piece 15 and a first restoring elastic piece 16, the positioning piece 15 is positioned and installed on the push rod 2, and the positioning piece 15 is also elastically connected with the upper side of the upper magnetic yoke 13 through the first restoring elastic piece 16; when the moving contact 11 is communicated with the fixed contact 10 and the push rod 2 continues to move upward for a certain distance, the upper magnetic yoke 13 can stay at a preset position under the synergistic action of the positioning element 15 and the first resilient element 16, and the distance L between the lower side of the upper magnetic yoke 13 and the upper side of the lower magnetic yoke 14 satisfies the relation: l < L0。
In this embodiment, it is further preferable that the positioning member 15 has a positioning bracket 150 and at least two connecting rods 151, the positioning bracket 150 has a bracket main body 1500 with an inverted U shape, the bracket main body 1500 covers the upper magnetic yoke 13, two side vertical walls of the bracket main body 1500 respectively extend downwards to the side of the supporting seat 3, and a pair of limiting hooks 1502 is relatively disposed on inner surfaces of the two side vertical walls of the bracket main body 1500; one end of each of the at least two connecting rods 151 is embedded in the supporting seat 3 through an injection molding process, and the other end of each of the at least two connecting rods 151 is correspondingly positioned and connected (particularly, preferably riveted) with the vertical walls on the two sides of the bracket main body 1500;
the first resilient member 16 is installed between an inner surface of a top wall of the bracket main body 1500 and an upper side surface of the upper magnetic yoke 13, and when the movable contact 11 is respectively communicated with the two fixed contacts 10 and the push rod 2 continues to move upward for a certain distance, the first resilient member 16 can cooperate with the pair of limiting hooks 1502 to enable the upper magnetic yoke 13 to stay at a preset position, that is, when the movable contact 11 is respectively communicated with the two fixed contacts 10 and the push rod 2 continues to move upward for a certain distance, the upper magnetic yoke 13 will move downward under the action of the first resilient member 16 until being stopped by the limiting hooks 1502 and stay at the preset position because the upper magnetic yoke 13 is no longer under the upward supporting force of the contact spring 12.
Further preferably, the present embodiment realizes that the structure that the first resilient elastic member 16 is mounted between the inner surface of the top wall of the bracket main body 1500 and the upper side surface of the upper yoke 13 is: the inner surface of the top wall of the bracket main body 1500 is provided with a mounting block 1501 protruding downwards, and the upper side surface of the upper magnetic yoke 13 is provided with a mounting groove 130 which is matched with the mounting block 1501 in a downward concave manner; the first resilient member 16 is a spring, which is sleeved on the mounting block 1501, and the bottom end of the first resilient member 16 is also resiliently abutted against the inner wall of the bottom of the mounting groove 130.
Example 2:
please refer to fig. 7 to fig. 12, which are schematic diagrams of a cross-sectional structure and a schematic diagram of a partially enlarged structure of two different viewing angles of the high-voltage direct-current relay in an off operating state, and schematic diagrams of a cross-sectional structure and a schematic diagram of a partially enlarged structure of two different viewing angles of the high-voltage direct-current relay in a closed operating state according to a second embodiment of the present invention.
In this embodiment, there are two fixed contacts 10, and the two fixed contacts 10 are arranged side by side; the moving contact 11 is of a long strip plate-shaped structure, and the length direction of the moving contact 11 is consistent with the direction of a central connecting line of the two fixed contacts 10;
the upper magnetic yoke 13 is of an inverted U-shaped groove structure, and is freely covered on the middle part of the upper side surface of the moving contact 11 and the upper section parts of the middle parts of the two long side vertical walls of the moving contact 11; the lower magnetic yoke 14 is a U-shaped groove structure, and is freely sleeved on the middle part of the lower side surface of the moving contact 11 and the lower section parts of the middle parts of the two long side vertical walls of the moving contact 11; in addition, the height of the side standing wall of the upper yoke 13 is also larger than that of the side standing wall of the lower yoke 14;
the push rod 2 is vertically arranged, the upper shaft end of the push rod 2 sequentially and movably penetrates through the lower magnetic yoke 14, the moving contact 11 and the upper magnetic yoke 13, and a support ring 4 is further positioned and sleeved on the push rod 2; the contact spring 12 is sleeved on the push rod 2, the lower end of the contact spring 12 is elastically abutted against the support ring 4, and the upper end of the contact spring 12 is elastically abutted against the outer wall of the bottom of the lower magnetic yoke 14 so as to apply upward elastic supporting force to the lower magnetic yoke 14; supplementary explanation: when the movable contacts 11 are disconnected from the two fixed contacts 10, respectively, the contact springs 12 can make the notches of the lower magnetic yoke 14 contact with the notches of the upper magnetic yoke 13, and of course, tolerance gaps may exist;
the adjusting and limiting assembly is provided with a positioning piece 15 and a first restoring elastic piece 16, the positioning piece 15 is positioned and installed on the push rod 2, and the positioning piece 15 is also elastically connected with the upper side of the upper magnetic yoke 13 through the first restoring elastic piece 16; when the movable contact 11 is communicated with the fixed contact 10 and the push rod 2 continues to move upward for a certain distance, the upper magnetic yoke 13 can stay at a preset position under the synergistic action of the first return elastic element 16 and the push rod 2, and the distance L between the lower side of the upper magnetic yoke 13 and the upper side of the lower magnetic yoke 14 satisfies the relation: l < L0。
In this embodiment, it is further preferable that the positioning element 15 has a positioning sleeve 152 which is annular and is positioned and sleeved on the upper end of the push rod 2, and a stopping edge 153 which extends radially outward from the upper end surface of the positioning sleeve 152;
the first resilient element 16 is a spring, and is sleeved on the positioning sleeve 152, and the upper end and the lower end of the first resilient element 16 are respectively and correspondingly elastically abutted against the stop edge 153 and the upper side surface of the upper magnetic yoke 13;
in addition, a limiting step 20 is disposed on the push rod 2 and below the top wall of the upper magnetic yoke 13, when the movable contacts 11 are respectively communicated with the two fixed contacts 10 and the push rod 2 continues to move upward for a certain distance, the limiting step 20 can cooperate with the first resilient member 16 to stop the upper magnetic yoke 13 at a preset position, that is, when the movable contacts 11 are respectively communicated with the two fixed contacts 10 and the push rod 2 continues to move upward for a certain distance, the upper magnetic yoke 13 will not be acted by the upward supporting force of the contact spring 12, so that the upper magnetic yoke 13 will move downward under the action of the first resilient member 16 until being stopped by the limiting step 20 and stop at the preset position.
Example 3:
please refer to fig. 13 to fig. 18, which are schematic diagrams of a cross-sectional structure and a partial enlarged structure of two different viewing angles of the high-voltage direct-current relay in an off operating state, and schematic diagrams of a cross-sectional structure and a partial enlarged structure of two different viewing angles of the high-voltage direct-current relay in a closed operating state according to a third embodiment of the present invention.
In this embodiment, there are two fixed contacts 10, and the two fixed contacts 10 are arranged side by side; the moving contact 11 is of a long strip plate-shaped structure, and the length direction of the moving contact 11 is consistent with the direction of a central connecting line of the two fixed contacts 10;
the upper magnetic yoke 13 is of a square flat plate structure and is freely placed in the middle of the upper side surface of the moving contact 11; the lower magnetic yoke 14 is a long-strip U-shaped groove structure extending along the length direction of the movable contact 11, the notch of the lower magnetic yoke 14 faces upwards, and the lower magnetic yoke 14 is freely sleeved at the middle part of the lower side surface of the movable contact 11 and the middle parts of two long side vertical walls of the movable contact 11;
the push rod 2 is vertically arranged, a supporting seat 3 made of a plastic material is positioned and arranged at the upper shaft end of the push rod 2, the lower end of the contact spring 12 is positioned and sleeved on the supporting seat 3, and the upper end of the contact spring 12 is elastically abutted against the outer wall of the bottom of the lower magnetic yoke 14 so as to apply upward elastic supporting force to the lower magnetic yoke 14; supplementary explanation: when the movable contacts 11 are disconnected from the two fixed contacts 10, respectively, the contact springs 12 can make the notches of the lower magnetic yoke 14 contact with the lower side surface of the upper magnetic yoke 13, and of course, tolerance gaps may exist;
the adjusting and limiting assembly is provided with an adjusting part 17 connected with the upper magnetic yoke 13 in a positioning manner, a second restoring elastic part 18 installed on the adjusting part 17, and a limiting part 19 connected with the push rod 2 in a positioning manner, when the movable contact 11 is disconnected from the fixed contact 10, the limiting part 19 can act on the second restoring elastic part 18, so that the second restoring elastic part 18 is in a deformed state, and the adjusting part 17 is in a fixed state relative to the push rod 2; when the movable contact 11 is communicated with the fixed contact 10 and the push rod 2 continues to move upward for a certain distance, the second restoring elastic member 18 can be partially separated from the limiting member 19 and return to the non-deformed state (it can be understood that when the movable contact 11 is disconnected from the fixed contact 10, the limiting member 19 is in surface contact with the second restoring elastic member 18, and when the movable contact 11 is in contact with the fixed contact 10, the limiting member 19 and the second restoring elastic member 18 become similar to point contact), at which point, the second restoring elastic member 18 can cooperate with the limiting member 19 to drive the adjusting member 17 and the upper magnetic yoke 13 to move downward together and stay at the preset position, and further, the distance L between the lower side of the upper magnetic yoke 13 and the upper side of the lower magnetic yoke 14 satisfies the following relation: l < L0。
In this embodiment, it is further preferable that the adjusting member 17 has an inverted U-shaped bracket main body, the bracket main body is covered outside the upper magnetic yoke 13, and the top wall of the bracket main body is further fixedly connected to the upper magnetic yoke 13, in addition, the two side vertical walls of the bracket main body further extend downwards to the side of the supporting seat 3, and an inverted U-shaped notch is respectively disposed at the bottom of each of the two side vertical walls of the bracket main body;
the number of the second restoring elastic pieces 18 is two, and both the two second restoring elastic pieces 18 adopt a spring plate structure and are correspondingly arranged in the two inverted-U-shaped gaps respectively;
the two limiting parts 19 are also two, the two limiting parts 19 adopt a U-shaped rod structure which is transversely arranged, and are respectively correspondingly positioned and installed on two opposite sides of the supporting seat 3 (specifically, two ends of each U-shaped rod are respectively embedded in one side of the supporting seat);
when the moving contact 11 is disconnected from the two fixed contacts 10, the two limiting members 19 can be correspondingly pressed against the two second restoring elastic members 18, so that the two second restoring elastic members 18 are in a deformed state, and the adjusting member 17 is in a fixed state relative to the push rod 2; when the movable contact 11 is respectively communicated with the two fixed contacts 10 and the push rod 2 continues to move upward for a certain distance, the two second restoring elastic members 18 are respectively and correspondingly partially separated from the two limiting members 19 and respectively move upward until the elastic members elastically abut against the top walls of the two inverted U-shaped notches (that is, the two second restoring elastic members 18 are restored to a non-deformed state), and in the restoring moving process of the two second restoring elastic members 18, the two second restoring elastic members 18 can generate upward acting forces on the two limiting members 19, and correspondingly, the two limiting members 19 can generate downward reaction forces on the adjusting member 17, so that the adjusting member 17 and the upper magnetic yoke 13 are driven to move downward together and stay at a preset position.
To sum up, compared with the prior art, the present invention improves the contact structure of the high voltage direct current relay, and adds an upper magnetic yoke disposed on the upper side of the moving contact, a lower magnetic yoke disposed between the lower side of the moving contact and the upper end of the contact spring, and an adjusting and limiting component mounted on the push rod and connected to the upper magnetic yoke, so that when the moving contact is communicated with the static contact and the push rod continues to move upward for a certain distance (i.e. over-travel distance), the adjusting and limiting component can act on the upper magnetic yoke, or the adjusting and limiting component can cooperate with the push rod to act on the upper magnetic yoke, so that the upper magnetic yoke stays at a predetermined position, and simultaneously, the distance between the lower side of the upper magnetic yoke and the upper side of the lower magnetic yoke is far smaller than the over-travel distance of the high voltage direct current relay, in addition, in the movement process of the push rod, the relative position of the upper magnetic yoke and the push rod is variable within a certain travel range, so that when the moving contact passes through current, the mutual attraction magnetic force generated between the upper magnetic yoke and the lower magnetic yoke is large, the movement of the moving contact to be separated from the fixed contact can be effectively limited, and the quality of a relay product is ensured.
The above description is only a preferred embodiment of the present invention, but not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as within the protection scope of the present invention.
Claims (10)
1. A contact structure of a high-voltage direct-current relay comprises a fixed contact (10), a moving contact (11) and a contact spring (12), wherein the moving contact (11) is vertically arranged opposite to the fixed contact (10), the contact spring (12) is sleeved on a push rod (2) of the high-voltage direct-current relay and can apply upward elastic supporting force to the moving contact (11), and the moving contact (11) can also move up and down relative to the fixed contact (10) under the driving of the push rod (2) so as to realize that the moving contact (11) is communicated with or disconnected from the fixed contact (10); the method is characterized in that: the device is characterized by further comprising an upper magnetic yoke (13), a lower magnetic yoke (14) and an adjusting and limiting assembly, wherein the upper magnetic yoke (13) is arranged on the upper side of the moving contact (11), the lower magnetic yoke (14) is arranged between the lower side of the moving contact (11) and the upper end of the contact spring (12), the adjusting and limiting assembly is mounted on the push rod (2) and can move along with the push rod, and the adjusting and limiting assembly is further connected with the upper magnetic yoke (13);
when the moving contact (11) is communicated with the fixed contact (10) and the push rod (2) continues to move upwards for a certain distance, the adjusting limiting component can act on the upper magnetic yoke (13), or the adjusting limiting component can cooperate with the push rod (2) to act on the upper magnetic yoke (13) together, so that the upper magnetic yoke (13) stays at a preset position, and then the distance L between the lower side of the upper magnetic yoke (13) and the upper side of the lower magnetic yoke (14) further satisfies the relational expression: l < L0(ii) a L in the formula0The overtravel distance of the high-voltage direct-current relay.
2. The contact structure of the high-voltage direct-current relay according to claim 1, characterized in that: the adjusting and limiting assembly is provided with a positioning piece (15) and a first restoring elastic piece (16), the positioning piece (15) is positioned and installed on the push rod (2), and the positioning piece (15) is also elastically connected with the upper side of the upper magnetic yoke (13) through the first restoring elastic piece (16); when the moving contact (11) is communicated with the fixed contact (10) and the push rod (2) continues to move upwards for a certain distance, the upper magnetic yoke (13) can stay at a preset position under the synergistic action of the positioning piece (15) and the first return elastic piece (16), and the distance L between the lower side of the upper magnetic yoke (13) and the upper side of the lower magnetic yoke (14) meets the relation: l < L0；
Or, the upper magnetic yoke (13) can stay at a preset position under the cooperation of the first return elastic piece (16) and the push rod (2), and the distance L between the lower side of the upper magnetic yoke (13) and the upper side of the lower magnetic yoke (14) satisfies the relation: l < L0。
3. The contact structure of the high-voltage direct-current relay according to claim 2, characterized in that: the number of the fixed contacts (10) is two, and the two fixed contacts (10) are arranged side by side; the moving contact (11) is of a long strip plate-shaped structure, and the length direction of the moving contact (11) is consistent with the central connecting line direction of the two static contacts (10);
the upper magnetic yoke (13) is of a square flat plate structure and is freely placed in the middle of the upper side surface of the moving contact (11); the lower magnetic yoke (14) is of a long-strip U-shaped groove structure extending along the length direction of the moving contact (11), the notch of the lower magnetic yoke (14) faces upwards, and the lower magnetic yoke (14) is freely sleeved at the middle part of the lower side surface of the moving contact (11) and the middle parts of two long side vertical walls of the moving contact (11);
the push rod (2) is vertically arranged, a supporting seat (3) is arranged at the upper shaft end of the push rod (2) in a positioning mode, the lower end of a contact spring (12) is sleeved on the supporting seat (3) in a positioning mode, the upper end of the contact spring (12) is elastically abutted to the outer wall of the bottom of the groove of the lower magnetic yoke (14), and upward elastic supporting force is applied to the lower magnetic yoke (14).
4. The contact structure of a high-voltage direct current relay according to claim 3, characterized in that: the positioning piece (15) is provided with a positioning support (150) and at least two connecting rods (151), the positioning support (150) is provided with an inverted U-shaped support main body (1500), the support main body (1500) is covered outside the upper magnetic yoke (13), two side vertical walls of the support main body (1500) respectively extend downwards to the side of the support seat (3), and a pair of limiting hooks (1502) are oppositely arranged on the inner surfaces of the two side vertical walls of the support main body (1500); one ends of the at least two connecting rods (151) are respectively embedded in the supporting seat (3), and the other ends of the at least two connecting rods (151) are respectively correspondingly positioned and connected with the vertical walls on the two sides of the bracket main body (1500);
the first return elastic piece (16) is installed between the inner surface of the top wall of the support body (1500) and the upper side surface of the upper magnetic yoke (13), and when the movable contact (11) is respectively communicated with the two fixed contacts (10) and the push rod (2) continues to move upwards for a certain distance, the first return elastic piece (16) can cooperate with the pair of limiting hooks (1502) to enable the upper magnetic yoke (13) to stay at a preset position.
5. The contact structure of the high-voltage direct-current relay according to claim 4, characterized in that: the structure that the first return elastic piece (16) is arranged between the inner surface of the top wall of the bracket main body (1500) and the upper side surface of the upper magnetic yoke (13) is realized as follows: an installation block (1501) is arranged on the inner surface of the top wall of the support main body (1500) in a downward protruding mode, and an installation groove (130) matched with the installation block (1501) is arranged on the upper side surface of the upper magnetic yoke (13) in a downward recessed mode; the first restoring elastic piece (16) is a spring and is sleeved on the mounting block (1501), and meanwhile, the bottom end of the first restoring elastic piece (16) is elastically abutted against the inner wall of the bottom of the mounting groove (130).
6. The contact structure of the high-voltage direct-current relay according to claim 2, characterized in that: the number of the fixed contacts (10) is two, and the two fixed contacts (10) are arranged side by side; the moving contact (11) is of a long strip plate-shaped structure, and the length direction of the moving contact (11) is consistent with the central connecting line direction of the two static contacts (10);
the upper magnetic yoke (13) is of an inverted U-shaped groove structure, and is freely covered on the middle part of the upper side surface of the moving contact (11) and the upper section parts of the middle parts of the two long side vertical walls of the moving contact (11); the lower magnetic yoke (14) is of a U-shaped groove structure and is freely sleeved on the middle part of the lower side surface of the moving contact (11) and the lower section parts of the middle parts of two long side vertical walls of the moving contact (11);
the push rod (2) is vertically arranged, the upper shaft end of the push rod (2) sequentially and movably penetrates through the lower magnetic yoke (14), the moving contact (11) and the upper magnetic yoke (13), and a supporting ring (4) is further positioned and sleeved on the push rod (2); the contact spring (12) is sleeved on the push rod (2), the lower end of the contact spring (12) is elastically abutted to the support ring (4), and the upper end of the contact spring (12) is elastically abutted to the outer wall of the bottom of the lower magnetic yoke (14) so as to apply upward elastic supporting force to the lower magnetic yoke (14).
7. The contact structure of the high-voltage direct-current relay according to claim 6, characterized in that: the positioning piece (15) is provided with a positioning shaft sleeve (152) which is annular and is positioned and sleeved on the upper shaft end of the push rod (2), and a stop edge (153) which extends outwards from the upper shaft end face of the positioning shaft sleeve (152) in the radial direction;
the first return elastic piece (16) is a spring and is sleeved on the positioning shaft sleeve (152), and the upper end and the lower end of the first return elastic piece (16) are respectively and correspondingly elastically abutted against the stop edge (153) and the upper side surface of the upper magnetic yoke (13);
in addition, a limiting step (20) is arranged on the push rod (2) and below the top wall of the upper magnetic yoke (13), and when the movable contact (11) is respectively communicated with the two fixed contacts (10) and the push rod (2) continues to move upwards for a certain distance, the limiting step (20) can cooperate with the first return elastic part (16) to enable the upper magnetic yoke (13) to stop at a preset position.
8. The contact structure of the high-voltage direct-current relay according to claim 1, characterized in that: the adjusting and limiting assembly is provided with an adjusting piece (17) connected with the upper magnetic yoke (13) in a positioning manner, a second restoring elastic piece (18) arranged on the adjusting piece (17), and a limiting piece (19) connected with the push rod (2) in a positioning manner, when the movable contact (11) is disconnected with the fixed contact (10), the limiting piece (19) can act on the second restoring elastic piece (18), so that the second restoring elastic piece (18) is in a deformation state, and the adjusting piece (17) is in a fixed state relative to the push rod (2); and when the moving contact (11) is communicated with the fixed contact (10) and the push rod (2) continues to move upwards for a certain distance, the second return elastic part (18) can be partially separated from the limiting part (19) and is restored to a non-deformation state, and then the second return elastic part (18) can cooperate with the limiting part (19) to drive the adjusting part (17) and the upper magnetic yoke (13) to move downwards together and stay at a preset position, and further the distance L between the lower side of the upper magnetic yoke (13) and the upper side of the lower magnetic yoke (14) meets the relation: l < L0。
9. The contact structure of a high-voltage direct current relay according to claim 8, characterized in that: the number of the fixed contacts (10) is two, and the two fixed contacts (10) are arranged side by side; the moving contact (11) is of a long strip plate-shaped structure, and the length direction of the moving contact (11) is consistent with the central connecting line direction of the two static contacts (10);
the upper magnetic yoke (13) is of a square flat plate structure and is freely placed in the middle of the upper side surface of the moving contact (11); the lower magnetic yoke (14) is of a long-strip U-shaped groove structure extending along the length direction of the moving contact (11), the notch of the lower magnetic yoke (14) faces upwards, and the lower magnetic yoke (14) is freely sleeved at the middle part of the lower side surface of the moving contact (11) and the middle parts of two long side vertical walls of the moving contact (11);
the push rod (2) is vertically arranged, a supporting seat (3) is arranged at the upper shaft end of the push rod (2) in a positioning mode, the lower end of a contact spring (12) is sleeved on the supporting seat (3) in a positioning mode, the upper end of the contact spring (12) is elastically abutted to the outer wall of the bottom of the groove of the lower magnetic yoke (14), and upward elastic supporting force is applied to the lower magnetic yoke (14).
10. The contact structure of the high-voltage direct current relay according to claim 9, characterized in that: the adjusting piece (17) is provided with an inverted U-shaped bracket main body, the bracket main body is covered outside the upper magnetic yoke (13), the top wall of the bracket main body is fixedly connected with the upper magnetic yoke (13), in addition, the vertical walls on two sides of the bracket main body respectively extend downwards to the side of the supporting seat (3), and inverted U-shaped notches are respectively arranged at the bottoms of the vertical walls on two sides of the bracket main body;
the number of the second recovery elastic pieces (18) is two, and the two second recovery elastic pieces (18) are both of a spring plate structure and are correspondingly arranged in the two inverted U-shaped gaps respectively;
the number of the limiting parts (19) is two, the two limiting parts (19) adopt U-shaped rod structures which are transversely arranged, and are correspondingly positioned and installed on two opposite sides of the supporting seat (3) respectively;
when the movable contact (11) is disconnected from the two fixed contacts (10), the two limiting parts (19) can correspondingly press against the two second restoring elastic parts (18), so that the two second restoring elastic parts (18) are in a deformation state, and the adjusting part (17) is in a fixed state relative to the push rod (2); when the movable contact (11) is respectively communicated with the two fixed contacts (10) and the push rod (2) continues to move upwards for a certain distance, the two second restoring elastic pieces (18) are respectively and correspondingly partially separated from the two limiting pieces (19) and respectively move upwards in a restoring manner until the elastic members are abutted to the top walls of the two inverted U-shaped notches, and in the restoring movement process of the two second restoring elastic pieces (18), the two second restoring elastic pieces (18) can generate upward acting forces on the two limiting pieces (19), correspondingly, the two limiting pieces (19) can generate downward reaction forces on the adjusting piece (17), so that the adjusting piece (17) and the upper magnetic yoke (13) are driven to move downwards together and stay at a preset position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921623530.6U CN210516637U (en) | 2019-09-27 | 2019-09-27 | Contact structure of high-voltage direct-current relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921623530.6U CN210516637U (en) | 2019-09-27 | 2019-09-27 | Contact structure of high-voltage direct-current relay |
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| CN210516637U true CN210516637U (en) | 2020-05-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582215A (en) * | 2019-09-27 | 2021-03-30 | 昆山国力源通新能源科技有限公司 | Contact structure of high-voltage direct-current relay |
| WO2022021286A1 (en) * | 2020-07-31 | 2022-02-03 | 华为数字能源技术有限公司 | Contact device, electromagnetic switch, on board charger, and new energy vehicle |
| WO2023273409A1 (en) * | 2021-06-30 | 2023-01-05 | 比亚迪股份有限公司 | Relay |
-
2019
- 2019-09-27 CN CN201921623530.6U patent/CN210516637U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112582215A (en) * | 2019-09-27 | 2021-03-30 | 昆山国力源通新能源科技有限公司 | Contact structure of high-voltage direct-current relay |
| CN112582215B (en) * | 2019-09-27 | 2024-06-18 | 昆山国力源通新能源科技有限公司 | Contact structure of high-voltage direct-current relay |
| WO2022021286A1 (en) * | 2020-07-31 | 2022-02-03 | 华为数字能源技术有限公司 | Contact device, electromagnetic switch, on board charger, and new energy vehicle |
| WO2023273409A1 (en) * | 2021-06-30 | 2023-01-05 | 比亚迪股份有限公司 | Relay |
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