CN210722900U - Low-power consumption high-voltage direct current contactor - Google Patents
Low-power consumption high-voltage direct current contactor Download PDFInfo
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- CN210722900U CN210722900U CN201921715011.2U CN201921715011U CN210722900U CN 210722900 U CN210722900 U CN 210722900U CN 201921715011 U CN201921715011 U CN 201921715011U CN 210722900 U CN210722900 U CN 210722900U
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Abstract
The utility model discloses a low-power consumption high voltage direct current contactor, which comprises a ceramic shell, a magnetic pole plate, two static contact points, a movable contact piece, a push rod, a movable iron core and a reset spring, wherein the lower side surface of the magnetic pole plate is concavely provided with a first mounting groove; the reset spring is provided with a first reset spring sleeved outside the push rod and a second reset spring sleeved outside the first reset spring in a clearance manner, the first reset spring is in slight tight fit with the push rod, and the upper end and the lower end of the first reset spring are elastically abutted against the top wall of the first mounting groove and the bottom wall of the second mounting groove respectively; the lower end of the second return spring is restrained at the bottom of the second mounting groove, and the upper end of the second return spring is movably arranged in the first mounting groove. The high-voltage direct-current contactor reduces the power consumption and the temperature rise of the coil, improves the stability, the safety and the short-circuit resistance of the high-voltage direct-current contactor, and meets the development requirements of contactor products.
Description
Technical Field
The utility model relates to a direct current contactor technical field specifically provides a can reduce low-power consumption high voltage direct current contactor of coil consumption and temperature rise.
Background
In the new energy market, customers pay more and more attention to the power and the temperature rise of a contactor magnetic circuit system, and from the development prospect of the current industry, the magnetic circuit system with low power and small temperature rise is the trend of future development.
The power consumption of the magnetic circuit system of the contactor is reflected in the energy consumed by overcoming the gravity of the movable iron core and the counter force of the return spring. In the existing contactor structure, only one return spring is usually configured, so when the stationary contact and the movable contact piece are closed, a large attraction force needs to be provided by the coil to enable the movable iron core to overcome the self-gravity and the pushing force of the return spring to move upwards. The attached figure 3 in the specification shows a change curve graph of the suction force provided by the coil and the reaction force generated by the single return spring in the moving process of the movable iron core, and it can be seen from the graph that a part of overlap exists between the suction force curve graph and the reaction force curve graph, which means that the suction force is smaller than the reaction force in this state, and the phenomenon of immobility occurs, so in order to overcome the above problems, the coil is required to provide a larger force value (i.e. power consumption) to push the movable iron core to move through this distance, and the purpose of complete attraction is achieved. Therefore, the existing contactor magnetic circuit system has the defects of high power consumption, high temperature rise and high cost, and does not meet the development requirement of contactor products.
In view of this, the present invention is especially provided.
Disclosure of Invention
In order to overcome the defects, the utility model provides a low-power consumption high voltage direct current contactor, its consumption and the temperature rise that has not only effectively reduced the coil have still promoted stability, security and the anti short circuit ability of self during operation greatly, fine satisfied the development demand of contactor product.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: a low-power consumption high-voltage direct current contactor comprises a ceramic shell with an opening at the lower side, a magnetic pole plate hermetically connected to the lower side of the ceramic shell, two static contact points arranged on the ceramic shell side by side, a movable contact piece movably arranged in the ceramic shell, and a push rod vertically arranged, wherein the movable contact piece and the two static contact points are respectively arranged along the vertical direction oppositely, the upper shaft end of the push rod is movably inserted into a movable iron core in a close fit manner after penetrating through the magnetic pole plate and is connected with the movable contact piece, the lower shaft end of the push rod is also sleeved with a reset spring, and the movable iron core is also movably arranged in a space surrounded by a coil; a first mounting groove is concavely arranged on the lower side surface of the magnetic pole plate, a second mounting groove which extends vertically and is opened on the upper surface of the movable iron core is arranged on the movable iron core, the second mounting groove and the first mounting groove are oppositely arranged, and the push rod movably penetrates through the second mounting groove and the first mounting groove;
the reset spring is provided with a first reset spring and a second reset spring, the first reset spring is sleeved outside the push rod, the first reset spring is slightly matched with the push rod, and the upper end and the lower end of the first reset spring are respectively and elastically abutted against the top wall of the first mounting groove and the bottom wall of the second mounting groove; the second reset spring is sleeved outside the first reset spring in a clearance mode, the lower end of the second reset spring is restrained at the bottom of the second mounting groove, and the upper end of the second reset spring is movably arranged in the first mounting groove.
As a further improvement of the present invention, the transverse section of the first mounting groove is circular, and the top wall of the first mounting groove has an interval with the upper end of the second return spring.
As a further improvement of the present invention, the second mounting groove has an upper section and a lower section arranged up and down, and a connection portion connected between the bottom side of the upper section and the top side of the lower section, wherein the cross sections of the upper section and the lower section are both circular rings, the height of the upper section is greater than that of the lower section, and the inner diameter of the upper section is greater than that of the lower section;
the outer diameter of the second return spring is consistent with the inner diameter of the lower section part, and the lower end of the second return spring is tightly inserted into the lower section part.
As a further improvement of the present invention, a through hole capable of penetrating through the top wall of the first mounting groove and the upper side of the magnetic pole plate is further formed on the magnetic pole plate, and the through hole is further formed on the same center line as the first mounting groove.
As a further improvement, the utility model is also provided with a supporting block and a contact spring, the supporting block is positioned and cup jointed on the upper shaft end of the push rod, the lower end of the contact spring is cup jointed on the upper part of the supporting block, just the upper end elastic butt of the contact spring is in on the lower side surface of the movable contact piece.
① compare in prior art, the utility model discloses two reset spring have been configured to still carry out the excellent accuse to two reset spring's mounting means, make the suction that the coil produced can be by whole utilization, thereby reduced the consumption of coil effectively, corresponding temperature rise that also has reduced the coil, the fine development demand that has satisfied the contactor product ② the utility model discloses a dispose two reset spring, still avoided effectively moving the iron core and appearing the instantaneous phenomenon in operating condition to effectively promote stability, security and the anti short circuit ability of contactor product during operation ③ the improvement simple structure of direct current contactor, reasonable, with low costs do benefit to popularization and implementation.
Drawings
Fig. 1 is a schematic view of a local cross-sectional structure of a low-power consumption high-voltage direct-current contactor according to the present invention in an off state;
FIG. 2 is an enlarged view of the portion A shown in FIG. 1;
fig. 3 is a graph showing the change of the attraction provided by the coil, the reaction force generated by the single return spring, and the reaction forces generated by the two return springs in the moving process of the movable iron core.
The following description is made with reference to the accompanying drawings:
1-ceramic shell 2-magnetic pole plate
20-first mounting groove 21-through hole
3-static contact point 4-moving contact piece
5-push rod 6-movable iron core
60-second mounting groove 600-upper section
601-lower segment 70-first return spring
71-second return spring 8-supporting block
9-contact spring
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.
Example 1:
please refer to fig. 1 and 2, which are a schematic diagram of a partial cross-sectional structure and an enlarged schematic diagram of a partial structure of a low-power consumption high-voltage dc contactor according to the present invention in an off state, respectively.
The low-power consumption high-voltage direct-current contactor of the utility model comprises a ceramic shell 1 with an open lower side, a magnetic pole plate 2 and two magnetic pole plates which are connected with the lower side of the ceramic shell 1 in a sealing way, wherein the magnetic pole plate 2 and two magnetic pole plates are arranged on the lower side of the ceramic shell 1 side by side, a movable contact piece 4 and a vertically arranged push rod 5 are arranged in the ceramic shell 1 in a movable way, wherein the movable contact piece 4 and the two magnetic pole plates 3 are respectively arranged along the vertical direction, the upper shaft end of the push rod 5 is movably arranged through the magnetic pole plate 2 and then connected with the movable contact piece 4, the lower shaft end of the push rod 5 is tightly inserted into a movable iron core 6 in a matching way, a reset spring (or called as a counter-force spring) is also sleeved on the push rod 5, and the movable iron core 6 is; specifically, a first mounting groove 20 is concavely provided on the lower side surface of the magnetic pole plate 2, and a second mounting groove 60 which extends vertically and is opened on the upper surface of the movable iron core 6 is provided on the movable iron core 6, the second mounting groove 60 and the first mounting groove 20 are arranged oppositely, and the push rod 5 movably penetrates through the second mounting groove 60 and the first mounting groove 20;
the return spring is provided with a first return spring 70 and a second return spring 71, the first return spring 70 is sleeved outside the push rod 5, and meanwhile, the first return spring 70 is in slight tight fit with the push rod 5, namely, a small gap is formed between the first return spring 70 and the push rod 5, and the upper end and the lower end of the first return spring 70 are respectively and elastically abutted against the top wall of the first mounting groove 20 and the bottom wall of the second mounting groove 60; the second return spring 71 is sleeved outside the first return spring 70 in a clearance manner, namely, the second return spring 71 is sleeved outside the first return spring 70, a slightly larger clearance is reserved between the second return spring 71 and the first return spring 70, meanwhile, the lower end of the second return spring 71 is restrained in the bottom of the second mounting groove 60, and the upper end of the second return spring 71 is movably arranged in the first mounting groove 20.
In this embodiment, it is preferable that the transverse section of the first mounting groove 20 is circular, and a space is provided between the top wall of the first mounting groove 20 and the upper end of the second return spring 71, that is, the two parts are not in contact with each other.
The second mounting groove 60 has an upper section 600 and a lower section 601 arranged up and down, and a connection part connected between the bottom side of the upper section 600 and the top side of the lower section 601, wherein the cross sections of the upper section 600 and the lower section 601 are both circular, the height of the upper section 600 is greater than that of the lower section 601, and the inner diameter of the upper section 600 is greater than that of the lower section 601;
the outer diameter of the second return spring 71 is identical to the inner diameter of the lower section 601, and the lower end of the second return spring 71 is tightly inserted into the lower section 601.
In this embodiment, it is preferable that the magnetic pole plate 2 further has a through hole 21 that can penetrate through the top wall of the first mounting groove 20 and the upper side surface of the magnetic pole plate 2, and the through hole 21 is further concentric with the first mounting groove 20.
In this embodiment, it is preferable that a supporting block 8 and a contact spring 9 are further provided, the supporting block 8 is positioned and sleeved on the upper shaft end of the push rod 5, the lower end of the contact spring 9 is sleeved on the upper portion of the supporting block 8, and the upper end of the contact spring 9 elastically abuts against the lower side surface of the movable contact piece 4.
In order to overcome the drawback of current single reset spring, the utility model discloses two reset spring have been configured, promptly first reset spring 70 with second reset spring 71, it is following right the utility model discloses a two reset spring's theory of operation explains, does: when the coil is not energized (i.e. when the movable iron core 6 is farthest from the magnetic pole plate 2), only the first return spring 70 acts on the movable iron core 6, and then at the moment when the coil is energized, only the counter force of the first return spring 70 and the gravity of the movable iron core 6 need to be overcome, which also indicates that the coil only needs to provide a small attractive force to enable the movable iron core 6 to move upwards. When the movable iron core 6 moves to a certain position, the second return spring 71 also starts to act on the movable iron core 6, and the total reaction force acting on the movable iron core 6 increases at this time, but at the same time, because the distance between the movable iron core 6 and the magnetic pole plate 2 is shortened, the coil can provide larger attraction force with the same power consumption, thereby overcoming the gravity of the movable iron core 6 and the reaction force of the two return springs. It can be seen from the description and the attached fig. 3 that the total reaction force of the double return springs is always smaller than the suction force of the coil, so that the phenomenon of incomplete suction can not occur in the whole moving process of the movable iron core. To sum up, the utility model discloses a improve reset spring for the suction that the coil produced can be by whole utilization, thereby can reduce the consumption of coil effectively.
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 (5)
1. A low-power consumption high-voltage direct current contactor comprises a ceramic shell (1) with an opening at the lower side, a magnetic pole plate (2) hermetically connected to the lower side of the ceramic shell (1), two static contact points (3) arranged on the ceramic shell (1) side by side, a movable contact piece (4) movably arranged in the ceramic shell (1) and a push rod (5) vertically arranged, wherein the movable contact sheet (4) and the two static contact points (3) are respectively arranged oppositely along the vertical direction, the upper shaft end of the push rod (5) is movably connected with the movable contact piece (4) after passing through the magnetic pole plate (2), the lower shaft end of the push rod (5) is inserted into a movable iron core (6) in a tight fit manner, a return spring is further sleeved on the push rod (5), and the movable iron core (6) is further movably arranged in a space surrounded by a coil; the method is characterized in that: a first mounting groove (20) is concavely arranged on the lower side surface of the magnetic pole plate (2), a second mounting groove (60) which extends vertically and is opened on the upper surface of the movable iron core (6) is arranged on the movable iron core, the second mounting groove (60) and the first mounting groove (20) are oppositely arranged, and the push rod (5) movably penetrates through the second mounting groove (60) and the first mounting groove (20);
the reset spring is provided with a first reset spring (70) and a second reset spring (71), the first reset spring (70) is sleeved outside the push rod (5), the first reset spring (70) is in micro-tight fit with the push rod (5), and the upper end and the lower end of the first reset spring (70) are elastically abutted to the top wall of the first mounting groove (20) and the bottom wall of the second mounting groove (60) correspondingly; the second reset spring (71) is sleeved outside the first reset spring (70) in a clearance mode, the lower end of the second reset spring (71) is restrained at the bottom of the second mounting groove (60), and the upper end of the second reset spring (71) is movably arranged in the first mounting groove (20).
2. The low power consumption high voltage direct current contactor according to claim 1, characterized in that: the transverse section of the first mounting groove (20) is circular, and a space is reserved between the top wall of the first mounting groove (20) and the upper end of the second return spring (71).
3. The low power consumption high voltage direct current contactor according to claim 1, characterized in that: the second mounting groove (60) is provided with an upper section part (600) and a lower section part (601) which are arranged up and down, and a connection part connected between the bottom side of the upper section part (600) and the top side of the lower section part (601), wherein the cross sections of the upper section part (600) and the lower section part (601) are both circular, the height of the upper section part (600) is greater than that of the lower section part (601), and the inner diameter of the upper section part (600) is greater than that of the lower section part (601);
the outer diameter of the second return spring (71) is consistent with the inner diameter of the lower section part (601), and the lower end of the second return spring (71) is tightly inserted into the lower section part (601).
4. The low power consumption high voltage direct current contactor according to claim 1, characterized in that: the magnetic pole plate (2) is further provided with a through hole (21) which can penetrate through the top wall of the first mounting groove (20) and the upper side face of the magnetic pole plate (2), and the through hole (21) is concentric with the first mounting groove (20).
5. The low power consumption high voltage direct current contactor according to claim 1, characterized in that: the push rod is characterized by further comprising a supporting block (8) and a contact spring (9), the supporting block (8) is positioned and sleeved on the upper shaft end of the push rod (5), the lower end of the contact spring (9) is sleeved on the upper portion of the supporting block (8), and the upper end of the contact spring (9) is elastically abutted to the lower side face of the movable contact piece (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921715011.2U CN210722900U (en) | 2019-10-14 | 2019-10-14 | Low-power consumption high-voltage direct current contactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921715011.2U CN210722900U (en) | 2019-10-14 | 2019-10-14 | Low-power consumption high-voltage direct current contactor |
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| Publication Number | Publication Date |
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| CN210722900U true CN210722900U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921715011.2U Active CN210722900U (en) | 2019-10-14 | 2019-10-14 | Low-power consumption high-voltage direct current contactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916312A (en) * | 2020-08-12 | 2020-11-10 | 浙江众信新能源科技股份有限公司 | Relay contact assembly capable of resisting large short circuit current |
| CN112735917A (en) * | 2019-10-14 | 2021-04-30 | 昆山国力源通新能源科技有限公司 | Low-power consumption high-voltage direct current contactor |
-
2019
- 2019-10-14 CN CN201921715011.2U patent/CN210722900U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735917A (en) * | 2019-10-14 | 2021-04-30 | 昆山国力源通新能源科技有限公司 | Low-power consumption high-voltage direct current contactor |
| CN111916312A (en) * | 2020-08-12 | 2020-11-10 | 浙江众信新能源科技股份有限公司 | Relay contact assembly capable of resisting large short circuit current |
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