CN210073732U

CN210073732U - Direct current contactor's contact support seat mounting structure and direct current contactor

Info

Publication number: CN210073732U
Application number: CN201921346472.7U
Authority: CN
Inventors: 陆源; 周旭东
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-02-14
Anticipated expiration: 2029-08-19

Abstract

The utility model discloses a direct current contactor's contact holder mounting structure, include: the middle cover is internally provided with an accommodating groove, and the bottom of the accommodating groove is provided with two sliding grooves; the contact supporting seat comprises a main body part in sliding fit with the middle cover and two structural walls; the main body part is assembled in the containing groove in a sliding mode, and the two structure walls are connected with the main body part and penetrate through the corresponding sliding grooves respectively. The contact support seat can be more stably connected or disconnected simultaneously on the movable contact group installed on the contact support seat and the static contact group installed on the middle cover.

Description

Direct current contactor's contact support seat mounting structure and direct current contactor

Technical Field

The utility model relates to a direct current contactor technical field, concretely relates to direct current contactor's contact support seat mounting structure and direct current contactor.

Background

In recent years, a direct current power system is rapidly applied and developed in the fields of rail transit, ship power supply, new energy power generation and the like with unique advantages. Dc circuit breakers have a function of interrupting a system fault current, and are gaining increasing attention as important protection and control devices for dc power systems.

In order to ensure long-term and reliable operation of a direct current power system, it is very important to research the electrical life of a direct current contactor. In order to improve the electrical life of dc contactors, it is desirable to improve their arc quenching capabilities, shorten arc time, and reduce contact erosion. At present, direct current contactor is mostly ordinary two breakpoint structures, and what this kind of contact mode formed is that two electric arcs establish ties, only two arc post district pressure drops promptly, and the pressure drop in every arc post district is great, is unfavorable for putting out the arc, so the contact mode of two breakpoint structures has the arcing time longer, to the serious problem of contact ablation to the influence leads to direct current contactor's electric life to be short.

The existing direct current contactor comprises a base, a middle cover, a static armature, a movable armature, a contact supporting seat, a movable contact, a static contact, a return spring, a movable contact spring and the like. The coil is sleeved on the static armature, when the coil is electrified, the static armature magnet attracts the moving armature to move downwards to drive the moving contact supporting seat to move downwards in the inner space of the middle cover, and then the return spring is compressed, a plurality of contacts on the moving contact are respectively contacted with a plurality of contacts of the static contact, then the moving contact supporting seat continues to move downwards, the moving contact spring is compressed, the moving contact is separated from the contact surface of the contact supporting seat, the deformation of the return spring and the deformation of the moving contact spring are continuously increased at the moment, and finally the coil suction force is kept balanced.

However, in the direct current contactor with such a structure, in the process that the contact supporting seat moves downwards under the driving of the moving armature or moves upwards under the action of the return spring, the balance of the contact supporting seat is not high, and the problem of vertical and horizontal deflection is easily caused, so that the moving contact on the contact supporting seat is driven to deflect, the moving contact and the static contact are difficult to open and close simultaneously, and therefore the improvement is needed.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the not high technical problem of the equilibrium of direct current contactor's contact holder in the up-and-down motion process among the prior art to a direct current contactor's contact holder mounting structure and direct current contactor are provided.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a contact holder mounting structure of a direct current contactor, comprising:

the middle cover is internally provided with an accommodating groove, and the bottom of the accommodating groove is provided with two sliding grooves;

the contact supporting seat comprises a main body part in sliding fit with the middle cover and two structural walls; the main body part is assembled in the containing groove in a sliding mode, and the two structure walls are connected with the main body part and penetrate through the corresponding sliding grooves respectively.

Furthermore, the two sliding grooves are L-shaped sliding grooves, and the part of the two sliding grooves, which is enclosed by the groove bottom of the accommodating groove, is rectangular; the cross section of the structure wall is in an L shape matched with the shape of the sliding groove.

Furthermore, the middle cover is provided with four static contact mounting grooves which are arranged in a pairwise corresponding manner on two sides of the accommodating groove, a static contact group is mounted in each static contact mounting groove, the main body part is provided with two movable contact groups, and two ends of each movable contact group extend out of two opposite sides of the main body part and are respectively limited in the two corresponding static contact mounting grooves.

Further, the stationary contact set includes: the middle part of the inner static contact group bypasses the accommodating groove, and the two ends of the inner static contact group are respectively positioned at the two static contact mounting grooves which are not correspondingly arranged at the two sides of the accommodating groove; and the two wiring static contact groups are fixedly arranged in the other two static contact mounting grooves respectively.

Furthermore, the inner static contact group is fixed at the bottom of the accommodating groove through a fixed cushion block.

Furthermore, a contact supporting pressure spring is elastically supported between the fixed cushion block and the main body part of the contact supporting seat, and the elastic force of the contact supporting pressure spring drives the main body part to drive the movable contact group to move along the accommodating groove in the direction of disconnecting from the fixed contact group.

Furthermore, a rectangular groove is formed in the bottom of the accommodating groove, and the overall dimension of the fixed cushion block is matched with that of the groove and is embedded in the groove.

Furthermore, a center hole is formed in the middle of the fixed cushion block, and one end of the contact supporting pressure spring extends into the center hole

Furthermore, a movable armature is fixedly connected between the two structure walls through a positioning block, and the movable armature drives the structure walls to move along the guide direction of the sliding groove under the action of the magnetic attraction force of the fixed armature.

On the other hand, the embodiment of the utility model provides a direct current contactor is still provided, include as above direct current contactor's contact support seat mounting structure.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a direct current contactor's contact support seat mounting structure, the gliding in-process of contact support seat at the holding tank of well lid under the exogenic action, because the holding tank is to the guide effect of main part, the guide effect of two spouts to two structure walls is covered to well, the problem of horizontal deflection about the contact support seat is difficult for appearing in the motion process, the equilibrium is better, thereby can make the movable contact group of installation on the contact support seat and cover the stationary contact group of installation in with can realize more stably that communicate simultaneously or break off

2. The utility model provides a direct current contactor's contact support seat mounting structure, static contact mounting groove play the guide effect to the direction of motion of movable contact group, can improve the equilibrium among the movable contact group motion process, make movable contact group realize more steadily with the fixed contact group when intercommunication or break off simultaneously.

3. The utility model provides a direct current contactor through adopting foretell contact support seat mounting structure, has improved the equilibrium in the contact support seat motion process, can make in cover quiet contact group and the quiet contact group on the contact support seat realize simultaneously intercommunication or disconnection simultaneously better, has improved direct current contactor's product property ability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a middle cover and a contact holder mounting structure of a dc contactor according to an embodiment of the present invention, a part of which is cut away to show an internal structure thereof;

fig. 2 is a schematic view of the overall structure of the middle cover in the embodiment of the present invention;

FIG. 3 is a top view of the middle cap shown in FIG. 1;

fig. 4 is a schematic view of the connection relationship among the contact holder, the movable contact group and the stationary contact group according to the embodiment of the present invention;

FIG. 5 is a schematic view of the overall structure of the fixing pad of the embodiment of the present invention;

fig. 6 is a schematic view of the overall structure of the dc contactor according to the embodiment of the present invention;

fig. 7 is a schematic diagram of an overall structure of a dc contactor according to an embodiment of the present invention, in which a portion of the dc contactor is cut away to show an internal structure thereof.

Description of reference numerals: 1. a middle cover; 101. accommodating grooves; 102. a chute; 103. a static contact mounting groove; 104. a groove; 2. a contact holder; 201. a main body portion; 202. a structural wall; 301. a wiring static contact group; 302. an inner stationary contact group; 4. a movable contact group; 5. fixing the cushion block; 501. a central bore; 6. the contact supports a pressure spring; 7. a moving armature; 8. positioning blocks; 9. a base; 10. an upper cover; 11. a static armature; 12. and a coil.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

A contact holder mounting structure of a dc contactor as shown in fig. 1 to 5 includes a middle cover 1, a contact holder 2, a stationary contact group, a movable contact group 4, and a contact holder compression spring 6. Wherein, the centre of well lid 1 has holding tank 101, and the tank bottom of holding tank 101 is equipped with two spout 102, and quiet contact group fixed mounting is on well lid 1. The contact holder 2 is slidably fitted with the middle cap 1 and comprises a main body 201 and two structural walls 202 integrally formed with the main body 201. The main body part 201 is slidably fitted in the receiving groove 101, the movable contact group 4 is disposed on the main body part 201 of the contact holder 2, and both ends of the movable contact group 4 protrude from openings at opposite ends of the main body part 201, respectively. Two structural walls 202 extend through the corresponding runners 102 and are in sliding engagement with the runners 102.

In the mounting structure of the contact support base 2, when the contact support base 2 slides in the accommodating groove 101 of the middle cover 1 under the action of external force, due to the guiding effect of the accommodating groove 101 on the main body part 201 and the guiding effect of the two sliding grooves 102 on the middle cover 1 on the structural wall 202, the contact support base 2 is not easy to swing up and down, left and right in the movement process, the balance is better, and the movable contact group 4 mounted on the contact support base 2 and the fixed contact group mounted on the middle cover 1 can be connected or disconnected simultaneously and more stably.

In the present embodiment, the receiving groove 101 and the main body portion 201 of the contact holder 2 are matched in external dimensions. The two sliding grooves 102 are both L-shaped sliding grooves 102, the portion enclosed between the two sliding grooves 102 is rectangular, and the cross section of the structural wall 202 is L-shaped to match the shape of the sliding groove 102. The two L-shaped sliding grooves 102 can limit the movement direction of the structural wall 202 in four degrees of freedom, thereby improving the balance of the sliding process of the contact holder 2.

In this embodiment, the two sides of the middle cover 1 corresponding to the accommodating groove 101 are further provided with four two pairs of corresponding static contact mounting grooves 103, the two corresponding static contact mounting grooves 103 are all penetrated through and perpendicular to the accommodating groove 101, and the static contact group is mounted in the static contact mounting groove 103. The static contact group comprises two wiring static contact groups 301 fixed on the two non-corresponding static contact mounting grooves 103 respectively and an inner static contact group 302 with the middle part bypassing the accommodating groove 101 and the two ends installed in the other two non-corresponding static contact mounting grooves 103 respectively, and the inner static contact group 302 is arranged in a Z shape when seen from the tops of the accommodating groove 101 and the static contact mounting grooves 103. Two moving contact sets 4 are arranged on the main body part 201 of the contact support base 2, and two ends of the two moving contact sets 4 respectively extend out of the main body part 201 and are limited by the side walls of the two correspondingly arranged static contact mounting grooves 103. The static contact mounting groove 103 plays a role in guiding the moving direction of the moving contact group 4, so that the balance of the moving contact group 4 in the moving process can be improved, and the moving contact group 4 can be more stably connected with or disconnected from the static contact group at the same time.

In this embodiment, the inner stationary contact group 302 is fixed to the bottom of the accommodating groove 101 by the fixed block 5. A contact supporting compression spring 6 is elastically supported between the fixed cushion block 5 and the main body part 201 of the contact supporting seat 2, and the elastic force of the contact supporting compression spring 6 drives the main body part 201 to drive the movable contact group 4 to move along the accommodating groove 101 in the direction of disconnecting from the stationary contact group, so that the movable contact group 4 and the stationary contact group keep a certain opening distance.

Specifically, a rectangular groove 104 is formed at the bottom of the accommodating groove 101, and the external dimension of the fixed cushion block 5 is matched with the external dimension of the groove 104 and is embedded in the groove 104. The groove 104 restricts the position of the fixing pad 5, and prevents the fixing pad 5 from loosening in the horizontal direction. Further, two mounting holes are formed in two sides above the fixing cushion block 5, and the inner stationary contact group 302 is fixed on the middle cover 1 through locking screws respectively.

In this embodiment, a center hole 501 is formed in the middle of the fixing block 5, and one end of the contact supporting compression spring 6 extends into the center hole 501. The central hole 501 has a limiting effect on the contact supporting pressure spring 6, and can improve the stability of the installation structure of the contact supporting pressure spring 6.

In the present embodiment, a movable armature 7 is fixedly connected between the two structure walls 202 through a positioning block 8, and the movable armature 7 drives the structure walls 202 to move along the guiding direction of the sliding chute 102 under the magnetic attraction of the fixed armature 11.

To sum up, the embodiment of the utility model provides a 2 mounting structure of direct current contactor's contact support seat, contact support seat 2 is at contact supporting spring or move the gliding in-process of holding tank 101 of lid 1 in under the effect of armature 7, because holding tank 101 is to the guide effect of main part 201, two spout 102 are to the guide effect of structure wall 202 on the lid 1 in, contact support seat 2 is difficult for appearing the problem of side to side deflection about in the motion process, the equilibrium is better, thereby can make a plurality of moving contacts on the contact support seat 2 and a plurality of static contacts on the static contact group realize simultaneously or break off more steadily.

On the other hand, as shown in fig. 6-7, the embodiment of the present invention further provides a dc contactor, which includes a housing, and a stationary contact set, a movable contact set 4, a contact supporting seat 2, a contact supporting compression spring 6 and a reciprocating driving structure, which are disposed in the housing. The housing includes a base 9, a middle cover 1, and an upper cover 10, which are assembled in this order from bottom to top, and the contact holder 2 and the middle cover 1 are assembled using the mounting structure described in the above embodiment. The reciprocating driving mechanism is connected with the contact supporting seat 2 and used for driving the contact supporting seat 2 to reciprocate along the accommodating groove 101 on the middle cover 1 so as to simultaneously connect and disconnect the moving contact on the moving contact group 4 and the static contact on the static contact group. The reciprocating driving mechanism comprises a static armature 11 and a movable armature 7, the static armature 11 is fixedly arranged on a base 9, and the movable armature 7 is fixedly connected with two structure walls 202 of the contact support base 2 through a positioning block 8.

The working principle of the direct current contactor is as follows: when a coil 12 on the static armature 11 is electrified, the static armature 11 magnetically attracts and moves the armature 7 downwards to drive the contact support base 2 to move downwards along the guide direction of the chute 102, so that the contact support compression spring 6 is compressed, and a plurality of moving contacts on the moving contact group 4 are respectively contacted with a plurality of static contacts of the static contact group at the same time; when the coil 12 of the static armature 11 is not energized, the moving contact set 4 is disconnected from the static contact set along the guiding direction of the sliding slot 102 by the elastic force of the contact supporting spring.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A contact holder mounting structure of a direct current contactor, comprising:

the middle cover (1) is internally provided with an accommodating groove (101), and the bottom of the accommodating groove (101) is provided with two sliding grooves (102);

a contact support (2) comprising a main body (201) slidingly engaged with the middle cover (1) and two structural walls (202); the main body part (201) is slidably assembled in the accommodating groove (101), and the two structure walls (202) are connected with the main body part (201) and respectively penetrate through the corresponding sliding grooves (102).

2. The contact holder mounting structure of a direct current contactor according to claim 1, wherein the two sliding grooves (102) are L-shaped sliding grooves (102), and a portion of the two sliding grooves (102) enclosed at a bottom of the receiving groove (101) is rectangular; the cross section of the structure wall (202) is L-shaped and matched with the shape of the sliding chute (102).

3. The contact holder mounting structure of a dc contactor according to claim 1, wherein the middle cover (1) is provided with four static contact mounting grooves (103) arranged correspondingly two by two corresponding to two sides of the accommodating groove (101), a static contact set is mounted in the static contact mounting groove (103), two moving contact sets (4) are provided on the main body portion (201), two ends of the moving contact sets (4) extend out of two opposite sides of the main body portion (201) and are respectively limited in the two correspondingly arranged static contact mounting grooves (103).

4. The contact holder mounting structure of a direct current contactor according to claim 3, wherein the stationary contact group includes: the middle part of the inner static contact group (302) bypasses the accommodating groove (101), and the two ends of the inner static contact group are respectively positioned on two non-correspondingly arranged static contact mounting grooves (103) on the two sides of the accommodating groove (101); and the two wiring static contact groups (301) are respectively and fixedly arranged in the other two static contact mounting grooves (103).

5. The contact holder mounting structure of a direct current contactor according to claim 4, wherein the inner stationary contact group (302) is fixed to a groove bottom of the receiving groove (101) by a fixing block (5).

6. The contact holder mounting structure of the direct current contactor according to claim 5, wherein a contact holder compression spring (6) is elastically supported between the fixed cushion block (5) and the main body portion (201) of the contact holder (2), and the main body portion (201) is driven by the elastic force of the contact holder compression spring (6) to move the movable contact group (4) along the accommodating groove (101) in a direction of disconnecting from the fixed contact group.

7. The contact holder mounting structure of a direct current contactor according to claim 6, wherein the bottom of the receiving groove (101) is provided with a rectangular groove (104), and the outer dimension of the fixed pad (5) is matched with the outer dimension of the groove (104) and is embedded in the groove (104).

8. The contact holder mounting structure of a direct current contactor according to claim 7, wherein a center hole (501) is formed in the middle of the fixed block (5), and one end of the contact supporting compression spring (6) is inserted into the center hole (501).

9. The mounting structure of the contact holder of the direct current contactor according to claim 1, wherein a movable armature (7) is fixedly connected between the two structure walls (202) through a positioning block (8), and the movable armature (7) drives the structure walls (202) to move along the guiding direction of the sliding chute (102) under the magnetic attraction of a fixed armature (11).

10. A dc contactor comprising the contact holder mounting structure of the dc contactor according to any one of claims 1 to 9.