CN218631840U

CN218631840U - Direct current contactor moving contact structure that bipolar multiple break points switch over

Info

Publication number: CN218631840U
Application number: CN202223174448.4U
Authority: CN
Inventors: 范海莘
Original assignee: Juen Electrical Shanghai Co ltd
Current assignee: Juen Electrical Shanghai Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-14
Anticipated expiration: 2032-11-29

Abstract

A moving contact structure of a direct current contactor with bipolar multi-breakpoint switching comprises a coil end cover and a coil assembly body, wherein a moving shaft is movably mounted in the middle of the coil assembly body, a through hole is formed in the middle of the coil end cover, the upper end of the moving shaft penetrates through the through hole and a contact ejector rod is fixedly mounted on the through hole, mounting grooves are formed in the left end and the right end of the contact ejector rod respectively, through holes are formed in two side surfaces of each mounting groove, a strip-shaped moving contact is mounted in each mounting groove, and welding silver points are fixedly mounted at two ends of the upper surface of each strip-shaped moving contact; the pressure spring is installed to mounting groove inner chamber bottom, and the conflict inslot at bar moving contact lower surface is installed to the pressure spring upper end. The utility model overcomes the defects of the prior art, and the two ends of the contact ejector rod are respectively provided with the strip-shaped moving contacts, so that two groups of strip-shaped moving contacts at the two ends of the contact ejector rod can synchronously move upwards, and each two fixed contacts respectively correspond to the welding silver points at the two ends of the upper surface of a group of strip-shaped moving contacts; thereby realizing the control switching effect of the bipolar multi-breakpoint contact.

Description

Direct current contactor moving contact structure that bipolar multiple break points switch over

Technical Field

The utility model relates to a direct current contactor technical field, concretely relates to direct current contactor movable contact structure that bipolar multi-breakpoint switched.

Background

The direct current contactor generally comprises a coil, an external magnetic circuit, an arc extinguish chamber, a fixed contact, a movable shaft assembly, a permanent magnet, a plastic shell and the like, and along with the wide use of energy-saving and efficient direct current equipment such as an electric automobile, a quick charging pile, battery switching, high-voltage direct current voltage switch control and the like, the direct current contactor is particularly developed and used in large quantities, so that the performance requirements of the direct current contactor product are continuously improved.

However, the existing bipolar direct current contactor is usually realized by connecting two unipolar direct current contactors in parallel, and due to deviation on a mechanical structure, the synchronism of closing a plurality of groups of contacts is poor, and the bipolar direct current contactor is large in size, high in cost and inconvenient to install.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a direct current contactor moving contact structure with double-pole multi-breakpoint switching, which overcomes the defects of the prior art, has reasonable design, and can ensure that two groups of strip moving contacts at two ends of a contact ejector rod synchronously move upwards by respectively installing strip moving contacts at two ends of the contact ejector rod, so that each two static contacts respectively correspond to welding silver points at two ends of the upper surface of one group of strip moving contacts; thereby realizing the control switching effect of the bipolar multi-breakpoint contact.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a moving contact structure of a bipolar multi-breakpoint switching direct-current contactor comprises a coil end cover and a coil assembly body, wherein a moving shaft is movably mounted in the middle of the coil assembly body, a through hole is formed in the middle of the coil end cover, the upper end of the moving shaft penetrates through the through hole and is fixedly mounted in the middle of a contact ejector rod, mounting grooves with upward openings are formed in the left end and the right end of the contact ejector rod, through holes are formed in the front side surface and the rear side surface of each mounting groove, strip-shaped moving contacts are mounted in the two mounting grooves, the front end and the rear end of each strip-shaped moving contact respectively penetrate through holes in the front side surface and the rear side surface of each mounting groove, and welding silver points are fixedly mounted at the two ends of the upper surface of each strip-shaped moving contact; the pressure spring is installed to mounting groove inner chamber bottom, the conflict groove has been seted up in the middle of the bar moving contact lower surface, the pressure spring upper end is installed in the conflict inslot.

Preferably, fixed mounting has the U type clamp of opening upwards in the mounting groove, the joint hole has all been seted up at the both ends of U type clamp, two the downthehole clamp board of installing of joint, enclose into a quad slit structure between clamp board and the U type clamp, the bar moving contact is installed in the quad slit.

Preferably, a positioning column is arranged at the bottom of the U-shaped clamp inner groove, and the bottom of the pressure spring is fixedly sleeved on the positioning column.

Preferably, the installation horizontal pole is installed to both sides all symmetry around the contact ejector pin intermediate position, the guiding hole that link up from top to bottom is seted up on the installation horizontal pole surface, movable mounting has the buffering nail in the guiding hole, buffering nail surface has cup jointed buffer spring, the upper end of buffer spring is inconsistent with the bellied lower plane in buffering nail upper end, the lower extreme of buffer spring is inconsistent with the inside annular step face of guiding hole.

Preferably, the outer surface of the moving shaft is sleeved with a tension spring, the upper end of the tension spring is connected with the outer surface of the moving shaft, and the lower end of the tension spring is connected with the bottom of the inner cavity of the coil assembly body.

The utility model provides a direct current contactor movable contact structure that bipolar multiple break point switches. The method has the following beneficial effects: the two ends of the contact ejector rod are respectively provided with the strip-shaped moving contacts, so that two groups of strip-shaped moving contacts at the two ends of the contact ejector rod can synchronously move upwards, and then, through the action that the welding silver points at the two ends of the upper surface of each group of strip-shaped moving contacts are respectively matched with the static contacts, each two static contacts are respectively corresponding to the welding silver points at the two ends of the upper surface of one group of strip-shaped moving contacts; thereby realizing the control switching effect of the bipolar multi-breakpoint contact; and through the elastic action of the pressure spring below each strip-shaped moving contact, each strip-shaped moving contact always has an upward acting force, so that when the strip-shaped moving contact moves upwards and a welding silver point is contacted with a fixed contact, an elastic pressing force is always generated, and the reliability of the contact between the welding silver point on the strip-shaped moving contact and the fixed contact is ensured.

Drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the description of the prior art will be briefly described below.

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the installation structure of the middle contact ejector pin of the present invention;

FIG. 4 is a schematic structural view of the middle contact pin of the present invention;

fig. 5 is a schematic structural view of the strip-shaped moving contact of the present invention cooperating with the U-shaped clamp;

the reference numbers in the figures illustrate:

1. a coil end cap; 2. a coil assembly; 3. a movable shaft; 4. a contact ejector rod; 5. mounting grooves; 6. a strip-shaped moving contact; 7. welding silver points; 8. compressing the spring; 9. a U-shaped clamp; 10. a clamping hole; 11. a clamp plate; 12. a positioning column; 13. installing a cross bar; 14. a guide hole; 15. buffering the nails; 16. a buffer spring; 17. a tension spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention will be combined below to clearly and completely describe the technical solutions of the present invention.

In the first embodiment, as shown in fig. 1 to 5, a moving contact structure of a bipolar multi-breakpoint switching direct-current contactor includes a coil end cover 1 and a coil assembly body 2, a moving shaft 3 is movably installed in the middle of the coil assembly body 2, a through hole is formed in the middle of the coil end cover 1, the upper end of the moving shaft 3 passes through the through hole and is fixedly installed in the middle of a contact ejector rod 4, mounting grooves 5 with upward openings are formed in the left and right ends of the contact ejector rod 4, through holes are formed in the front and rear side surfaces of the mounting grooves 5, strip-shaped moving contacts 6 are installed in the two mounting grooves 5, the front and rear ends of the strip-shaped moving contacts 6 respectively pass through the through holes in the front and rear side surfaces of the mounting grooves 5, and welding silver dots 7 are fixedly installed at the two ends of the upper surface of the strip-shaped moving contacts 6; a pressure spring 8 is installed at the bottom of the inner cavity of the mounting groove 5, a contact groove is formed in the middle of the lower surface of the bar-shaped moving contact 6, and the upper end of the pressure spring 8 is installed in the contact groove.

The working principle is as follows:

when the coil assembly body 2 is electrified through a lead, the moving shaft 3 positioned in the middle of the coil assembly body 2 can axially move upwards under the action of electromagnetic force, so that the whole contact ejector rod 4 at the upper end of the moving shaft 3 is driven to move upwards, and the two ends of the contact ejector rod 4 are respectively provided with the strip-shaped moving contacts 6 through the mounting grooves 5, so that two groups of strip-shaped moving contacts 6 at the two ends of the contact ejector rod 4 can be driven to synchronously move upwards, and then, through the action that the welding silver points 7 at the two ends of the upper surface of each group of strip-shaped moving contacts 6 are respectively matched with the 4 static contacts, each two static contacts respectively correspond to the welding silver points 7 at the two ends of the upper surface of one group of strip-shaped moving contacts 6; thereby realizing the control switching effect of the bipolar multi-breakpoint contact;

in the embodiment, the pressure spring 8 is arranged below each strip-shaped moving contact 6, so that each strip-shaped moving contact 6 always has an upward acting force through the elastic action of the pressure spring 8, and therefore, when the strip-shaped moving contact 6 moves upward and the welding silver point 7 is in contact with the fixed contact, an elastic pressing force is always generated, and the reliability of the contact between the welding silver point 7 on the strip-shaped moving contact 6 and the fixed contact is ensured.

In the second embodiment, as a further preferable scheme of the first embodiment, a U-shaped clamp 9 with an upward opening is fixedly installed in the installation groove 5, clamping holes 10 are respectively formed at two ends of the U-shaped clamp 9, clamping plates 11 are installed in the two clamping holes 10, a square hole structure is defined between the clamping plates 11 and the U-shaped clamp 9, and the strip-shaped movable contact 6 is installed in the square hole.

Cup joint on bar moving contact 6 both sides face through U type clamp 9, and through clamp board 11 and U type clamp 9 matched with effect, thereby can realize prescribing a limit to the position of bar moving contact 6, and when bar moving contact 6 rebound and make welding silver point 7 and static contact when, bar moving contact 6 can be owing to pressure effect downstream, the effect of accessible U type clamp 9 is in order to realize 6 moving direction's of bar moving contact direction with prescribing a limit to this moment, in order to prevent that bar moving contact 6 from taking place to deflect, then avoided welding silver point 7 and static contact to take place the contact failure problem.

In a third embodiment, as a further preferable scheme of the second embodiment, a positioning column 12 is arranged at the bottom of an inner groove of the U-shaped hoop 9, and the bottom of the pressure spring 8 is fixedly sleeved on the positioning column 12. Can realize the limited effect to pressure spring 8 bottom position through reference column 12, can realize the limited effect to pressure spring 8 upper end position through the conflict groove of 6 lower surfaces of bar moving contact.

In a fourth embodiment, as a further preferred scheme of the first embodiment, the front side and the rear side of the middle position of the contact ejector rod 4 are symmetrically provided with mounting cross rods 13, the surface of each mounting cross rod 13 is provided with a guide hole 14 which is through up and down, a buffer nail 15 is movably mounted in each guide hole 14, the outer surface of each buffer nail 15 is sleeved with a buffer spring 16, the upper end of each buffer spring 16 abuts against the lower protruding plane at the upper end of each buffer nail 15, and the lower end of each buffer spring 16 abuts against the annular step surface in each guide hole 14.

When the installation, the upper end of the buffer nail 15 can be in corresponding contact with the inner surface of the contact cavity cover above the coil end cover 1, therefore, when the moving shaft 3 drives the whole contact ejector rod 4 to move upwards, a downward pressure effect can be applied to the buffer nail 15 through the inner surface of the contact cavity cover, the buffer nail 15 is enabled to move downwards relative to the axial direction of the guide hole 14, then the buffer spring 16 can be pressed downwards through the upper end protrusion of the buffer nail 15, and therefore the elastic force effect of the buffer spring 16 can be achieved, and the buffer effect when the whole contact ejector rod 4 moves upwards can be achieved.

Fifth embodiment, as the further preferred scheme of first embodiment, move axle 3 surface and cup joint extension spring 17, extension spring 17 upper end is connected with moving axle 3 surface, and extension spring 17 lower extreme is connected with coil assembly 2 inner chamber bottom. So that when the moving shaft 3 moves downward, the buffer can be performed by the elastic action of the tension spring 17 to prevent the device from being damaged due to the excessive downward force of the moving shaft 5.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a direct current contactor moving contact structure that bipolar multiple-breakpoint switched, includes coil end cover (1) and coil assembly body (2), movable mounting has removal axle (3) in the middle of coil assembly body (2), the through-hole has been seted up in the middle of coil end cover (1), its characterized in that: the upper end of the moving shaft (3) penetrates through the through hole and is fixedly installed in the middle of the contact ejector rod (4), the left end and the right end of the contact ejector rod (4) are respectively provided with an installation groove (5) with an upward opening, the front side face and the rear side face of each installation groove (5) are respectively provided with a through hole, strip-shaped moving contacts (6) are respectively installed in the two installation grooves (5), the front end and the rear end of each strip-shaped moving contact (6) respectively penetrate through the through holes in the front side face and the rear side face of each installation groove (5), and welding silver points (7) are respectively fixedly installed at the two ends of the upper surface of each strip-shaped moving contact (6); the contact device is characterized in that a pressure spring (8) is installed at the bottom of an inner cavity of the installation groove (5), a contact groove is formed in the middle of the lower surface of the strip-shaped moving contact (6), and the upper end of the pressure spring (8) is installed in the contact groove.

2. A bipolar multi-break point switching direct current contactor movable contact structure as claimed in claim 1, wherein: fixed mounting has the U type clamp (9) of the open-ended that makes progress in mounting groove (5), joint hole (10) have all been seted up at the both ends of U type clamp (9), two install clamp plate (11) in joint hole (10), enclose into a quad slit structure between clamp plate (11) and U type clamp (9), bar moving contact (6) are installed in the quad slit.

3. A bipolar multi-break point switching direct current contactor movable contact structure as claimed in claim 2, wherein: u type clamp (9) inside groove bottom is provided with reference column (12), fixed the cup jointing in pressure spring (8) bottom is on reference column (12).

4. A bipolar multi-break point switching direct current contactor movable contact structure as claimed in claim 1, wherein: installation horizontal pole (13) are installed to the equal symmetry in both sides around contact ejector pin (4) intermediate position, the guiding hole (14) that link up from top to bottom are seted up on installation horizontal pole (13) surface, movable mounting has buffer nail (15) in guiding hole (14), buffer nail (15) surface has cup jointed buffer spring (16), buffer spring (16) upper end is inconsistent with the bellied lower plane in buffer nail (15) upper end, buffer spring (16) lower extreme is inconsistent with the inside annular step face of guiding hole (14).

5. A bipolar multi-break point switching direct current contactor movable contact structure as claimed in claim 1, wherein: remove axle (3) surface and cup jointed extension spring (17), extension spring (17) upper end is connected with removal axle (3) surface, extension spring (17) lower extreme is connected with coil assembly body (2) inner chamber bottom.