CN218769315U

CN218769315U - Electromagnetic contactor with wear protection device

Info

Publication number: CN218769315U
Application number: CN202223090630.1U
Authority: CN
Inventors: 朱冯伟
Original assignee: Lexing Electric Wuxi Co ltd
Current assignee: Lexing Electric Wuxi Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-03-28
Anticipated expiration: 2032-11-21

Abstract

The utility model relates to an electromagnetic contactor with a wear protection device, which comprises a base, wherein the top of the base is provided with a static contact component; the movable support moves up and down relative to the base, a movable contact seat penetrating through the top surface of the base extends upwards from the top of the movable support, and a movable contact assembly is mounted on the movable contact seat; guide rails are symmetrically arranged on the opposite inner side surfaces in the base, support arms extend downwards from two ends of the bottom of the movable support, and the support arms are assembled in the corresponding guide rails and move up and down; the bottom ends of the single support arms are wrapped with protective shells, and the protective shells are in contact with the inner wall surface of the guide rail in a fitting manner; the movable support with the movable contact assembly moves downwards or upwards along the base, so that the movable contact and the fixed contact are closed or disconnected, friction between the movable support and the base in the moving process is effectively reduced due to the arrangement of the protective shell at the bottom end of the support arm, abrasion is effectively reduced, abrasion dust is reduced, and the power is used for improving and ensuring the service life and the service reliability of the contactor.

Description

Electromagnetic contactor with wear protection device

Technical Field

The utility model belongs to the technical field of the contactor technique and specifically relates to an electromagnetic contactor with wear protection device.

Background

When it is necessary to switch between connection or disconnection of a power source and a load, an electromagnetic contactor or an electromagnetic switch is most commonly used. The electromagnetic contactor makes the movable electrode close to the fixed electrode in a suction way under the action of magnetic force after being electrified, and then releases separation under the action of the spring when the electromagnetic contactor is electrified, so that the power-on or power-off of the main loop is realized.

Since the contactor must have insulation properties and can withstand high temperatures generated in the interior and the main circuit, a thermosetting resin meeting the conditions is generally used as a material of a component, and the material has high hardness and can withstand reciprocating movement during repeated power-on and power-off processes, but is easily worn gradually due to friction during reciprocating movement to generate dust, so that reciprocating movement is not smooth, even poor contact between a movable electrode and a fixed electrode of the main circuit is caused, and the use reliability and the service life of the contactor are seriously affected.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects in the prior art and provides the electromagnetic contactor with the abrasion protection device, which is reasonable in structure, so that abrasion is effectively reduced, dust is reduced, and the service life and the service reliability of the contactor are prolonged and guaranteed.

The utility model discloses the technical scheme who adopts as follows:

an electromagnetic contactor with a wear protection device comprises a base, wherein a fixed contact assembly is arranged at the top of the base; the movable support moves up and down relative to the base, a movable contact seat penetrating through the top surface of the base extends upwards from the top of the movable support, and a movable contact assembly is mounted on the movable contact seat; guide rails are symmetrically arranged on the opposite inner side surfaces in the base, support arms extend downwards from two ends of the bottom of the movable support, and the support arms are assembled in the corresponding guide rails and move up and down; the bottom end of each support arm is wrapped by a protective shell, and the protective shells are in fit contact with the inner wall surface of the guide rail.

As a further improvement of the above technical solution:

the protective shell is an integrated stamping part, and the protective shell is clamped and fixed at the bottom end of the corresponding support arm.

The protective shell is a U-shaped structure formed by a vertical plate and two side plates, and the U-shaped structure laterally wraps the lower part of the support arm; the vertical plate is provided with an elastic sheet in an inward stamping manner, the support arm is provided with a groove, and the elastic sheet extends into the groove and abuts against the bottom surface of the groove to form a clamping structure; the bottom surfaces of the side plates on the two sides extend oppositely to form horizontal flanges, the horizontal flanges are located below the bottom ends of the support arms, and the horizontal flanges and the elastic pieces jointly form a limiting structure of the protective shell in the up-down direction relative to the support arms after the protective shell is installed.

The groove is of a vertical long groove structure, and the bottom end of the elastic sheet which inclines downwards and inwards is abutted against the inner bottom surface of the groove.

The edges of the side plates at the two sides, which are far away from the vertical plate, are bent and extended to form vertical flanges which are inward closed, and obtuse angles are formed between the vertical flanges and the corresponding side plates; and chamfers matched with the vertical flanges are arranged on the vertical edges of the support arms.

The movable support and the base are both made of insulating high-temperature-resistant thermosetting resin materials, and the protective shell is made of wear-resistant stainless steel materials.

The bottom end of the base is assembled on the bottom plate, a space for installing the coil iron core assembly is formed between the base and the bottom plate, and a coil in the coil iron core assembly is electrically connected with an external power supply; the movable support positioned in the base is provided with a movable iron core assembly, and the movable iron core assembly is positioned above the coil iron core assembly at intervals.

Elastic pieces are arranged between the bottom ends of the support arms of the movable support and the bottom plate below the support arms; the middle part of the bottom end of the support arm extends downwards to form an upper convex column for sleeving and positioning the top of the elastic part, and the bottom plate extends upwards to form a lower convex column for sleeving and positioning the bottom of the elastic part.

The movable contact assembly is provided with a downward moving contact which is positioned right above the corresponding fixed contact; as the movable support moves downwards relative to the base, the movable contact moves downwards and is closed with the fixed contact below; and the arc striking pieces are arranged on the lateral outer parts of the static contacts and are arranged on the side surfaces of the joints of the moving contacts and the static contacts at intervals.

Two groups of static contact assemblies are symmetrically arranged on the top surface of the base, and the movable support penetrates out of the top surface of the base between the two groups of static contact assemblies; the single group of moving contact assemblies penetrate through the static contact seats arranged on the movable support, moving contacts are symmetrically arranged at two ends of the bottom surface of each moving contact assembly, and the two moving contacts are matched with the two symmetrical static contacts in the two groups of static contact assemblies below.

The beneficial effects of the utility model are as follows:

the utility model has compact and reasonable structure and convenient use, the movable support with the movable contact component moves downwards or upwards along the base to close or open the movable and static contacts, the friction between the movable support and the base in the moving process is effectively reduced by the arrangement of the protective shell at the bottom end of the support arm, and the abrasion is effectively reduced, thereby reducing the generation of dust, effectively improving the internal use environment of the contactor, and helping to improve and ensure the service life and the use reliability of the contactor;

the utility model discloses still include following advantage:

the protective shell is positioned between the movable support and the base and separates the movable support and the base at a relative movement position, so that relative friction between the movable support and the base is effectively avoided;

the protective housing adopts stainless steel, compares in the thermosetting resin material that contacts, and stainless steel coefficient of friction is lower, more has the wearability to effective reduce wearing and tearing and the dust that produces because of wearing and tearing reduce the influence to the smooth and easy removal of moving contact.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an explosion diagram of the present invention.

Fig. 3 is a schematic view of the installation between the movable support and the base of the present invention.

Fig. 4 is an installation schematic diagram of the movable support and the protective shell of the present invention.

Fig. 5 is a schematic structural view of the protective shell of the present invention.

Wherein: 1. a base plate; 2. a base; 3. a stationary contact assembly; 4. an elastic member; 5. a protective shell; 6. a movable support; 7. a moving contact assembly; 8. a coil core assembly;

11. a lower convex column;

21. a stationary contact base; 22. a guide rail;

31. an arc striking sheet;

51. a vertical plate; 52. a side plate; 53. vertically flanging; 54. a spring plate; 55. horizontally flanging;

61. a movable contact seat; 62. a movable iron core assembly; 63. a support arm; 64. an upper convex column; 65. a groove; 66. and (6) chamfering.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and fig. 2, the electromagnetic contactor with a wear protection device of the present embodiment includes a base 2, and a fixed contact component 3 is mounted on a top of the base 2; the device also comprises a movable support 6 which moves up and down relative to the base 2, wherein the top of the movable support 6 extends upwards to form a movable contact seat 61 which penetrates out of the top surface of the base 2, and a movable contact component 7 is arranged on the movable contact seat 61; the opposite inner side surface inside the base 2 is symmetrically provided with guide rails 22, two ends of the bottom of the movable support 6 extend downwards to form support arms 63, and the support arms 63 are assembled in the corresponding guide rails 22 and move up and down; the bottom end of each support arm 63 is wrapped with a protective shell 5, and the protective shells 5 are in contact with the inner wall surface of the guide rail 22 in an attaching mode.

In this embodiment, the movable support 6 with the movable contact assembly 7 moves downwards or upwards along the base 2, so that the movable contact and the fixed contact are closed or disconnected, and the arrangement of the protective shell 5 at the bottom end of the support arm 63 effectively reduces the friction between the movable support 6 and the base 2 in the moving process relative to the base 2, effectively reduces the abrasion, thereby reducing the generation of dust and effectively improving the use environment inside the contactor.

Furthermore, the protective shell 5 is an integrated stamping part, and the protective shell 5 is clamped and fixed at the bottom end of the corresponding support arm 63.

In this embodiment, the protective shell 5 is located between the movable support 6 and the base 2 and separates the movable support 6 from the base 2 at a relative movement position, so that relative friction between the movable support 6 and the base 2 is effectively avoided.

In the embodiment shown in fig. 3, the single guide rail 22 is formed by two vertical ribs spaced apart on the inner side of the base 2, and the arm 63 is received between the two vertical ribs to form a sliding fit; of course, the guide rail 22 may be provided in other shape structures, which can achieve the guide for the movable support 6 to move up and down.

As shown in fig. 4, the wall surface of the bottom end of the arm 63 facing the vertical edge and the inner side surface of the base 2 is covered by the protective shell 5, so that the contact or friction between the movable bracket 6 and the base 2 at the relative movement position is effectively avoided.

In the embodiment shown in fig. 5, the protective shell 5 is a U-shaped structure formed by a vertical plate 51 and two side plates 52, and the U-shaped structure is laterally wrapped on the lower portion of the supporting arm 63, so as to realize effective isolation between the outer wall surface of the supporting arm 63 and the inner side surfaces of the guide rail 22 and the base 2.

In order to realize the relative fixed installation of the protective shell 5 on the support arm 63, in the embodiment, the vertical plate 51 is provided with the elastic sheet 54 by inward stamping, the support arm 63 is provided with the groove 65, and the elastic sheet 54 extends into the groove 65 and abuts against the bottom surface of the groove 65 to form a clamping structure; the bottom surfaces of the side plates 52 on the two sides extend oppositely to form horizontal flanges 55, the horizontal flanges 55 are located below the bottom ends of the support arms 63, and the horizontal flanges 55 and the elastic sheets 54 jointly form a limiting structure of the protective shell 5 in the up-down direction after being installed relative to the support arms 63, so that the protective shell 5 can be reliably installed at the bottom relative to the support arms 63.

The groove 65 is a vertical long groove structure, and the bottom end of the elastic sheet 54 inclining downwards and inwards is abutted against the inner bottom surface of the groove 65.

In this embodiment, with protective housing 5 from upwards to the suit of support arm 63 bottom down, shell fragment 54 receives the pressure of the lateral wall face of support arm 63 and the direction deformation towards vertical plate 51 for protective housing 5 can smoothly for support arm 63 slidable mounting that makes progress, until shell fragment 54 slides to recess 65 department, shell fragment 54 deformation atress is relieved and is resumeed, shell fragment 54 extends to in the recess 65, this moment, the horizontal turn-ups 55 of protective housing 5 bottom reason is located support arm 63 below and is close to each other, accomplish the installation of protective housing 5 on support arm 63.

In this embodiment, the elastic sheet 54 effectively restricts the downward movement of the protective shell 5 relative to the support arm 63 from coming off, and the horizontal flange 55 effectively restricts the upward movement of the protective shell 5 relative to the support arm 63, so that the protective shell 5 and the support arm 63 are mounted.

Furthermore, the edges of the side plates 52 on the two sides, which are far away from the vertical plate 51, are bent and extended to form vertical flanges 53 which are inwardly closed, and an obtuse angle is formed between each vertical flange 53 and the corresponding side plate 52; a chamfer 66 matched with the vertical flanging 53 is arranged on the vertical edge of the support arm 63; vertical turn-ups 53 and the setting and matching of chamfer 66 have effectively prevented that protective housing 5 from deviating from for the side direction of support arm 63, make it laminate each other after the installation, and the helping hand is in the smoothness nature and the reliability of guaranteeing that movable support 6 reciprocates for base 2.

Because the contactor must have insulating property and can bear high temperature generated in the interior and the main loop, the movable support 6 and the base 2 are both made of insulating high-temperature-resistant thermosetting resin materials, and the protective shell 5 is made of wear-resistant stainless steel materials.

The protective shell 5 is made of stainless steel, and compared with a thermosetting resin material which is in contact with the stainless steel, the stainless steel has lower friction coefficient and higher wear resistance, thereby effectively reducing abrasion and dust generated due to abrasion, and reducing the influence on smooth movement of the moving contact.

In the embodiment shown in fig. 2 and 3, the bottom end of the base 2 is assembled on the bottom plate 1, a space for installing the coil core assembly 8 is formed between the base 2 and the bottom plate 1, and the coil in the coil core assembly 8 is electrically connected with an external power supply; the movable support 6 positioned in the base 2 is provided with a movable iron core assembly 62, and the movable iron core assembly 62 is positioned above the coil iron core assembly 8 at intervals.

When the coil in the coil core assembly 8 is electrified, the magnetization generates magnetic force, the movable core assembly 62 above is pulled, the movable support 6 descends, and the movable contact assembly 7 is close to and contacts with the static contact assembly 3 below to be closed along with the descending of the movable support 6.

Furthermore, elastic pieces 4 are arranged between the bottom ends of the support arms 63 of the movable support 6 and the lower bottom plate 1, and when the movable support 6 descends, the elastic pieces 4 compress and store energy; the middle part of the bottom end of the support arm 63 extends downwards to form an upper convex column 64 for sleeving and positioning the top of the elastic element 4, and the bottom plate 1 extends upwards to form a lower convex column 11 for sleeving and positioning the bottom of the elastic element 4.

When the coil in the coil core assembly 8 loses power, the magnetic force disappears, the movable support 6 moves upward relative to the base 2 under the reactive force of the elastic element 4 by taking the guide rail 22 as a guide, and the movable contact assembly 7 moves upward to be away from the static contact assembly 3.

Furthermore, an upward static contact is arranged on the static contact component 3, a downward moving contact is arranged on the moving contact component 7, and the moving contact is positioned right above the corresponding static contact; as the movable support 6 moves downwards relative to the base 2, the movable contact moves downwards and is closed with the fixed contact below; and an arc striking plate 31 is arranged at the lateral outer part of the static contact, and the arc striking plates 31 are arranged at the side surface of the joint of the movable contact and the static contact at intervals.

Two groups of static contact assemblies 3 can be symmetrically arranged on the top surface of the base 2, and the movable support 6 penetrates out of the top surface of the base 2 between the two groups of static contact assemblies 3; a single group of moving contact assemblies 7 penetrates through the static contact seats 21 arranged on the movable support 6, moving contacts are symmetrically arranged at two ends of the bottom surface of each moving contact assembly 7, and the two moving contacts are matched with two symmetrical static contacts in the two groups of static contact assemblies 3 below; that is, one group of moving contact assemblies 7 is simultaneously matched with two groups of static contact assemblies 3 below through two moving contacts at two ends; the whole structure is compact and reasonable.

The utility model discloses compact structure is ingenious, in contactor break-make repetitive operation, has effectively reduced friction, the wearing and tearing that reciprocal relative movement and produced between movable support 6 and base 2, has reduced the production of dust, has effectively improved the inside service environment of contactor, and the helping hand is in life and the operational reliability who promotes and guarantee the contactor.

The above description is for the purpose of explanation and not limitation of the invention, and reference is made to the claims for what are intended to be covered by the present invention.

Claims

1. An electromagnetic contactor having a wear protection device, comprising: the device comprises a base (2), wherein a static contact component (3) is arranged at the top of the base (2); the device also comprises a movable support (6) which moves up and down relative to the base (2), wherein the top of the movable support (6) extends upwards to form a moving contact seat (61) penetrating through the top surface of the base (2), and a moving contact component (7) is arranged on the moving contact seat (61); guide rails (22) are symmetrically arranged on the opposite inner side surfaces in the base (2), support arms (63) extend downwards from two ends of the bottom of the movable support (6), and the support arms (63) are assembled in the corresponding guide rails (22) and move up and down; the bottom end of each support arm (63) is wrapped with a protective shell (5), and the protective shells (5) are in contact with the inner wall surface of the guide rail (22) in an attaching mode.

2. An electromagnetic contactor having a wear protection device as claimed in claim 1, wherein: the protective shell (5) is an integrated stamping part, and the protective shell (5) is clamped and fixed at the bottom end of the corresponding support arm (63).

3. The electromagnetic contactor with wear protection device of claim 1, wherein: the protective shell (5) is of a U-shaped structure formed by a vertical plate (51) and two side plates (52), and the U-shaped structure is laterally wrapped on the lower part of the support arm (63); the vertical plate (51) is provided with an elastic sheet (54) in an inward stamping manner, the support arm (63) is provided with a groove (65), and the elastic sheet (54) extends into the groove (65) and abuts against the bottom surface of the groove (65) to form a clamping structure; the bottom surfaces of the side plates (52) on the two sides extend oppositely to form horizontal flanges (55), the horizontal flanges (55) are positioned below the bottom ends of the support arms (63), and the horizontal flanges (55) and the elastic sheets (54) jointly form a limiting structure of the protective shell (5) in the vertical direction after being installed relative to the support arms (63).

4. An electromagnetic contactor having a wear protection device as claimed in claim 3, wherein: the groove (65) is of a vertical long groove structure, and the bottom end of the elastic sheet (54) which inclines downwards and inwards is abutted against the inner bottom surface of the groove (65).

5. The electromagnetic contactor with wear protection device of claim 3, wherein: edges of the side plates (52) at the two sides, which are far away from the vertical plate (51), are bent and extended to form vertical flanges (53) which are inward closed, and an obtuse angle is formed between each vertical flange (53) and the corresponding side plate (52); and a chamfer (66) matched with the vertical flanging (53) is arranged on the vertical edge of the support arm (63).

6. The electromagnetic contactor with wear protection device of claim 1, wherein: the movable support (6) and the base (2) are both made of insulating high-temperature-resistant thermosetting resin materials, and the protective shell (5) is made of wear-resistant stainless steel materials.

7. The electromagnetic contactor with wear protection device of claim 1, wherein: the bottom end of the base (2) is assembled on the bottom plate (1), a space for installing the coil iron core assembly (8) is formed between the base (2) and the bottom plate (1), and a coil in the coil iron core assembly (8) is electrically connected with an external power supply; a movable support (6) positioned inside the base (2) is provided with a movable iron core assembly (62), and the movable iron core assembly (62) is positioned above the coil iron core assembly (8) at intervals.

8. The electromagnetic contactor with wear protection device of claim 7, wherein: elastic parts (4) are arranged between the bottom ends of the support arms (63) of the movable support (6) and the bottom plate (1) below the movable support; the middle part of the bottom end of the support arm (63) extends downwards to form an upper convex column (64) for sleeving and positioning the top of the elastic part (4), and the bottom plate (1) extends upwards to form a lower convex column (11) for sleeving and positioning the bottom of the elastic part (4).

9. The electromagnetic contactor with wear protection device of claim 1, wherein: an upward static contact is arranged on the static contact component (3), a downward moving contact is arranged on the moving contact component (7), and the moving contact is positioned right above the corresponding static contact; as the movable support (6) moves downwards relative to the base (2), the moving contact moves downwards and is closed with the static contact below; and the side outer part of the static contact is also provided with an arc striking sheet (31), and the arc striking sheets (31) are arranged on the side surface of the joint of the moving contact and the static contact at intervals.

10. The electromagnetic contactor with wear protection as claimed in claim 9, wherein: two groups of static contact components (3) on the top surface of the base (2) are symmetrically arranged, and the movable support (6) penetrates out of the top surface of the base (2) between the two groups of static contact components (3); a single group of moving contact assemblies (7) penetrates through a static contact seat (21) arranged on a movable support (6), moving contacts are symmetrically arranged at two ends of the bottom surface of each moving contact assembly (7), and the two moving contacts are matched with two symmetrical static contacts in the two groups of static contact assemblies (3) below.