CN220604580U - Contactor - Google Patents

Abstract

The utility model discloses a contactor, which comprises a fixed contact component and a moving contact component, wherein the connection and disconnection of the fixed contact component and the moving contact component can control the on-off of the contactor, and the moving contact component comprises: a contact portion including contacts on both sides; the movable spring part comprises a push rod, a lower wedge block, an inclined reed and an upper wedge block, wherein the lower wedge block, the inclined reed and the upper wedge block are sleeved with the push rod according to the stacking, and the inclined reed is clamped by the lower wedge block and the upper wedge block so that the inclined reed has a certain inclination angle at the initial position; the iron core part comprises a movable iron core which is sleeved with the pushing rod; when the fixed contact assembly and the movable contact assembly are combined, one end of the pushing rod drives the inclined reed to contact with the lower surface of the contact on one side of the contact part, and then the inclined reed rotates to a horizontal position to contact with the lower surface of the contact on the other side of the contact part. The utility model can realize time-sharing on-off of millisecond level.

Description

Contactor

Technical Field

The utility model belongs to the field of piezoelectric devices, and particularly relates to a contactor.

Background

The new energy industry is rising to promote related practitioners to study the arc principle of the piezoelectric device, and the proposals of AST and ASD technologies also put higher requirements on the time-sharing mechanism of the contactor body. The common structure of the high-voltage direct current contactor is that the bridge reed is closed under the pushing of the electromagnetic mechanism, and contacts at two ends are simultaneously closed (closing time difference is about tens to hundreds of microseconds) by the precision of parts of the contactor and assembly limit, however, in the two electronic arc extinguishing technical schemes, the capacitor charge-discharge interval requires millisecond level to realize the function normally; time-sharing contact is unreliable depending on the structural differences of the contactor bodies.

For example, the structure of the direct current contactor contact assembly with the patent number of CN112563078A adopts a structure of single-side silver points to realize the sequential closing of double contacts, and the structure has the advantages that the single-side arcing can be realized to reduce contact ablation, the time-sharing effect is also realized, but the time-sharing time required by the electronic arc extinguishing technology can not be met due to the connection time difference. For example, the direct current contactor with the patent number of CN216980464U realizes the time-sharing on-off of two sides of the reed through the traction of a single-side contact spring and the rotation structure of the reed, but the mechanism has a plurality of parts, the contact is connected to easily generate contact vibration, and an arc extinguishing circuit is triggered by mistake.

On the basis, the utility model provides a contact system for time-sharing on-off and a contactor thereof, the time-sharing on-off between contacts is realized through a structure with inclined reeds, the time-sharing time required by an electronic arc extinguishing technology can be calculated through theory, and the structure can provide technical scheme support of a body structure for the time-sharing electronic arc extinguishing technology.

Disclosure of Invention

Accordingly, the technical problem to be solved by the present utility model is to overcome at least one of the above-mentioned drawbacks of the prior art, and provide a contactor capable of realizing time-sharing on-off in millisecond level.

In order to solve the technical problems, the technical scheme of the embodiment of the contactor provided by the utility model is as follows:

a contactor comprising a stationary contact assembly and a moving contact assembly, the engagement and disengagement of the stationary contact assembly and the moving contact assembly being capable of controlling the on-off of the contactor, wherein the moving contact assembly comprises:

a contact portion including contacts on both sides;

the movable spring part comprises a push rod, a lower wedge block, a inclined reed and an upper wedge block, wherein the lower wedge block, the inclined reed and the upper wedge block are sleeved with the push rod according to the stacking, and the inclined reed is clamped by the lower wedge block and the upper wedge block so that the inclined reed has a certain inclined angle at an initial position;

the iron core part comprises a movable iron core, and is positioned below the lower wedge block, and the movable iron core is sleeved with the pushing rod;

when the fixed contact assembly and the movable contact assembly are connected, the movable iron core moves downwards, the push rod drives one end of the inclined reed to contact with the lower surface of the contact on one side of the contact part, and then the inclined reed rotates to a horizontal position to contact with the lower surface of the contact on the other side of the contact part.

Further, the lower surface of the contact is an arc surface.

Preferably, the cambered surface is a spherical revolution body.

Further, the contact comprises a contact main body part and a contact shoulder part, wherein the contact shoulder part is arranged at the lower end of the corresponding contact, the cross section area of the contact shoulder part is larger than the area of the lower surface of the contact main body part, and the lower surface of the contact shoulder part is the lower surface of the contact.

Preferably, the contact shoulder has a thickness of 1mm to 2mm.

Further, round chamfers are arranged at two ends of the inclined reed.

Further, the movable spring part further comprises a first elastic body and a first clamp spring, the push rod comprises a first shaft shoulder, a second shaft shoulder and a third shaft shoulder which are sequentially arranged from bottom to top, the first shaft shoulder is sleeved with the first elastic body, the upper end of the first elastic body is sleeved with the lower counter bore clamping position of the lower wedge block, the inclined spring and the upper wedge block are sequentially stacked and then are sleeved with the push rod at the second shaft shoulder, and the first clamp spring is fixedly clamped with the third shaft shoulder and tightly attached to the push rod by compressing the first elastic body.

Further, the upper wedge block comprises a limit fork, the lower wedge block comprises a limit column, the limit fork is sleeved with the limit column in a vertical sliding mode, so that the lower wedge block, the inclined reed and the upper wedge block are relatively and radially fixed, and the lower wedge block can freely rotate around the push rod.

Further, the holes in the lower wedge block, the inclined reed and the upper wedge block for accommodating the pushing rod are all inclined holes.

Preferably, the inclined hole is 2-6 degrees.

Preferably, the inner diameter r of the inclined hole is larger than or equal to 1.1s×sin theta, wherein s is the thickness of the inclined reed, and theta is the inclination angle of the inclined reed at the initial position.

Further, the first thick edge of the lower wedge block and the second thick edge of the upper wedge block are placed in a staggered mode.

Further, the iron core part still includes second elastomer, gleitbretter, magnetic conduction section of thick bamboo, second jump ring, line frame and metal cup, the second elastomer with move the iron core closely laminate in on the push rod, just move iron core (32) and be in under the compression of second elasticity (31) body can follow push rod (21) up-and-down motion, the second jump ring set up in the push rod lower extreme is used for spacing move the lower limb position of iron core, the gleitbretter cover is established move the iron core outside, the magnetic conduction section of thick bamboo cover is established in the gleitbretter outside, the line frame cover is established magnetic conduction section of thick bamboo outside and is arranged in the metal cup is inside, the line frame is located magnetic conduction section of thick bamboo upper edge department is provided with the line frame flange for spacing magnetic conduction section of thick bamboo upper edge position, and with thereby the bending part card that the gleitbretter upper edge set up is in between line frame flange and the magnetic conduction section of thick bamboo upper edge is fixed the gleitbretter, the line frame lateral wall passes through the magnetic conduction section of thick bamboo extrusion makes the gleitbretter keeps down motion when the magnetic conduction section of thick bamboo down edge down, the line frame is held down edge down than the magnetic conduction section of thick bamboo down, the line down edge is outstanding with the magnetic conduction section of thick bamboo, the magnetic conduction is down.

The utility model has the beneficial effects that: the structure that upper wedge block and lower wedge block centre gripping inclined reed makes inclined reed have a stable inclination in initial position, and in moving spring part motion in-process, inclined reed's one end first contacts with certain side contact, and then first elastomer compression, inclined reed rotates to horizontal position, contacts with the contact of opposite side to it is stable controllable to have realized contactor timesharing time. The structure can realize millisecond-level time-sharing on-off, meets the on-off time interval required by an electronic arc extinguishing circuit, and has compact and reliable combination of all parts, good stability and high consistency of the time-sharing on-off contactor.

Drawings

FIG. 1 is a semi-sectional view of a contactor according to an embodiment of the utility model;

FIG. 2 is a partial semi-sectional view of a contact portion of a contactor according to an embodiment of the utility model;

fig. 3 is an exploded view of a moving spring portion of the contactor according to the embodiment of the present utility model;

FIG. 4 is a schematic view of the movement of a contactor according to an embodiment of the present utility model;

wherein the above figures include the following reference numerals:

a contact part 1, a lower surface of the contact 11, a contact shoulder 12;

the movable spring part, the push rod, the first shaft shoulder 211, the second shaft shoulder 212, the third shaft shoulder 213, the first elastic body 22, the lower wedge block 23, the first thick edge 231, the lower wedge block hole 232, the lower counter bore 233, the limiting column 234, the inclined spring 24, the inclined spring slice hole 241, the inclined spring slice holes 242, the two ends of the inclined spring slice, the upper wedge block 25, the upper wedge block hole 251, the second thick edge 252, the limiting fork 253 and the first clamp spring 26;

the magnetic iron comprises a 3 iron core part, a 31 second elastic body, a 32 movable iron core, a 321 movable iron core inner groove, a 33 sliding sheet, a 34 magnetic conduction cylinder, a 35 second clamping spring, a 36 wire frame, a 361 wire frame convex plate and a 37 metal cup;

4, a shell;

a yoke plate 5;

6, an insulating base plate;

7, arc extinguishing cover;

8, an exhaust pipe;

9 washers;

a 10 nut;

11 an upper housing;

12.

Detailed Description

The utility model and its advantageous effects will be described in further detail below with reference to the detailed description and the accompanying drawings, but the detailed description of the utility model is not limited thereto.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, left, right" and the like are used generally with respect to the orientation shown in the drawings or with respect to the orientation of the component itself in terms of vertical, vertical or gravitational force; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

The utility model provides a contactor, which comprises a fixed contact component and a moving contact component, wherein the connection and disconnection of the fixed contact component and the moving contact component can control the connection and disconnection of the contactor, fig. 1 is a semi-sectional view of the contactor according to an embodiment of the utility model, fig. 2 is a partial semi-sectional view of a contact part of the contactor according to an embodiment of the utility model, fig. 3 is an exploded view of a moving spring part of the contactor according to an embodiment of the utility model, and fig. 4 is a movement schematic diagram of the contactor according to an embodiment of the utility model, please refer to fig. 1 to 4, wherein the moving contact component comprises:

a contact portion 1 including contacts on both sides;

the movable spring part 2 comprises a push rod 21, a lower wedge block 23, a bevel spring 24 and an upper wedge block 25, wherein the lower wedge block 23, the bevel spring 24 and the upper wedge block 25 are sequentially stacked and then sleeved with the push rod 21, and the bevel spring 24 is clamped by the lower wedge block 23 and the upper wedge block 25 so that the bevel spring 24 has a certain inclination angle at the initial position;

the iron core part 3 comprises a movable iron core 32, is positioned below the lower wedge block 23, and is sleeved with the push rod 21 by the movable iron core 32;

when the fixed contact assembly and the movable contact assembly are combined, the movable iron core 32 moves downwards, the pushing rod 21 drives one end of the inclined reed 24 to contact with the lower surface of the contact on one side of the contact part 1, and then the inclined reed 24 rotates to a horizontal position to contact with the lower surface of the contact on the other side of the contact part 1.

When the inclined reed 24 contacts the lower surface of the contact, the initial contact position is that one end of the inclined reed contacts the center line point of the lower surface of the corresponding contact.

The casing 4, the yoke plate 5, the insulating base plate 6, the arc extinguishing chamber 7, the exhaust pipe 8, the gasket 9, the nut 10, the upper casing 11 and the upper cover 12 are irrelevant to the innovation point of the present utility model, the drawing is only an example, the specific scheme adopted is not limited by the present utility model, and the present utility model can be designed by one skilled in the art according to the needs.

According to the embodiment of the utility model, the structure that the inclined reed 24 is clamped by the upper wedge 25 and the lower wedge 23 of the contactor ensures that the inclined reed 24 has a stable inclined angle at the initial position, and when the fixed contact component and the movable contact component are connected, the push rod 21 drives one end of the inclined reed 24 to contact with the lower surface of the contact on one side of the contact part 1, and then the inclined reed 24 rotates to a horizontal position to contact with the lower surface of the contact on the other side of the contact part 1, so that the time-sharing stable and controllable contactor is realized. The structure can realize millisecond-level time-sharing on-off, meets the on-off time interval required by an electronic arc extinguishing circuit, and has compact and reliable combination of all parts, good stability and high consistency of the time-sharing on-off contactor.

Preferably, the lower surface 11 of the contact is an arc surface, the arc surface can enable the contact to be in point-surface contact during collision, the bouncing of the contact is reduced, and the radius of the arc surface is preferably 40-60 mm.

Preferably, the cambered surface is a spherical revolution body, so that the processing difficulty can be reduced, and the contact curvature change is gentle when the inclined reed 24 slides.

Further, the contact comprises a contact main body part and a contact shoulder part 12, the contact shoulder part 12 is arranged at the lower end of the corresponding contact, the cross section area of the contact shoulder part 12 is larger than the area of the lower surface of the contact main body part, the lower surface of the contact shoulder part 12 is the lower surface 11 of the contact, and the purpose of arranging the contact shoulder part 12 is to lead out arc angle transition.

Preferably, the thickness of the contact shoulder 12 is 1mm to 2mm, so that the contact collision stability is ensured under the small space volume, and further, the edge of the contact shoulder 12 is in a circular arc chamfer transition, so that the inclined reed 24 is prevented from being scratched when being collided.

Further, the two ends 242 of the inclined reed 24 are provided with round chamfers, smooth contact surface transitional curvature is formed in the process of the suction of the contactor, suction bounce and material abrasion are reduced, and the round chamfers are preferably R0.5-R4 mm.

Referring to fig. 3, the movable spring part 2 further includes a first elastic body 22 and a first clamping spring 26, the push rod 21 includes a first shaft shoulder 211, a second shaft shoulder 212 and a third shaft shoulder 213 sequentially disposed from bottom to top, the first shaft shoulder 211 is sleeved with the first elastic body 22, the upper end of the first elastic body 22 is sleeved with a lower counter bore 233 of the lower wedge 23, the inclined spring 24 and the upper wedge 25 are sequentially stacked and then sleeved with the push rod 21 at the second shaft shoulder 212, and the first clamping spring 26 is fixedly clamped with the third shaft shoulder 213 and tightly attaches the lower wedge 23, the inclined spring 24 and the upper wedge 25 to the push rod 21 by compressing the first elastic body 22.

The diameter of the first shaft shoulder 211 of the push rod 21 is larger than that of the first elastic body 22, so that the push rod and the first elastic body are reliably contacted, the inner diameter of the lower wedge block hole 232 is larger than the outer diameter of the first elastic body 22, and radial clamping of the lower wedge block 23 and the first elastic body 22 is realized.

Referring to the right view of fig. 3, the upper wedge 25 includes a limiting fork 253, the lower wedge 23 includes a limiting post 234, and the limiting fork 253 is sleeved with the limiting post 234 in an up-down sliding manner, so that the lower wedge 23, the inclined reed 24 and the upper wedge 25 are relatively fixed in a radial direction and can freely rotate around the push rod 21.

With continued reference to the right view of fig. 3, the holes in the lower wedge 23, the inclined spring 24 and the upper wedge 25 for receiving the push rod 21 are inclined holes, so that the inclined spring 24 is clamped by the lower wedge 23 and the upper wedge 25 to have a certain inclination angle at the initial position.

Preferably, the inclined holes are 2-6 degrees.

Further, the inner diameter r of the inclined hole is larger than or equal to 1.1s×sin θ, where s is the thickness of the inclined reed 24, and θ is the inclination angle of the inclined reed 24 at the initial position, so that the inclined reed 24 does not interfere with the push rod 21 when rotating to the horizontal position.

Preferably, the first thick edge 231 of the lower wedge 23 and the second thick edge 252 of the upper wedge 25 are offset, and the structure has an assembling fool-proof effect.

Referring to fig. 4, the iron core portion 3 further includes a second elastic body 31, a sliding vane 33, a magnetic conductive cylinder 34, a second clamp spring 35, a wire frame 36 and a metal cup 37, where the second elastic body 31 and the moving iron core 32 are tightly attached to the push rod 21, and the moving iron core 32 can move up and down along the push rod 21 under the compression of the second elastic body 31, the second clamp spring 35 is disposed at the lower end of the push rod 21 and used for limiting the lower edge of the moving iron core 32, the sliding vane 33 is sleeved outside the moving iron core 32, the magnetic conductive cylinder 34 is sleeved outside the sliding vane 33, the wire frame 36 is sleeved outside the magnetic conductive cylinder 34 and is disposed inside the metal cup 37, a wire frame protruding plate 351 is disposed at the upper edge of the magnetic conductive cylinder 34 and used for limiting the upper edge of the magnetic conductive cylinder 34, so that the bending portion disposed at the upper edge of the sliding vane 33 is clamped between the wire frame protruding plate 351 and the upper edge of the magnetic conductive cylinder 34, the side wall of the wire frame 36 extrudes the sliding vane 33 through the magnetic conductive cylinder 34, so that the sliding vane 33 keeps stable when moving up and down in the magnetic conductive cylinder 34, the lower edge of the magnetic conductive cylinder 34 protrudes beyond the lower edge of the wire frame 36, and contacts the lower edge of the magnetic conductive cylinder 36, and the lower edge of the magnetic conductive cylinder 37. The purpose of the lower edge of the magnetic conduction tube 34 protruding beyond the lower edge of the wire frame 36 is that the magnetic conduction tube 34 contacts with the lower edge of the metal cup 37, so that the arc extinguishing chamber 7, the insulating base plate 6, the yoke plate 5, the wire frame 36, the sliding sheets 33 and the metal cup 37 are axially fastened, the lower edge of the wire frame 36 is suspended, and a margin can be reserved for micro deformation of the wire frame 36.

The inner diameter of the inner slot 321 of the movable iron core is slightly larger than the outer diameter of the second elastic body 31, so that radial limiting of the two is realized, the sliding sheet 33 adopts a sheet-shaped roller and is placed at the inner wall of the magnetic conduction cylinder 34, the lower edge of the sliding sheet 33 does not exceed the inner wall area of the magnetic conduction cylinder 34, the upper edge rolling part of the sliding sheet 33 is placed between the convex plate 361 of the wire frame and the magnetic conduction cylinder 34 and is fixedly pressed by upper and lower tight fit, further, the sliding sheet 33 is made of a material with low wear resistance and low friction coefficient, and the sliding sheet 33 slides relatively when the movable iron core 32 moves up and down, so that smaller friction can be ensured, and the movement axis is not deviated.

Further, the lower edge of the magnetic conduction barrel 34 protrudes from the lower edge of the wire frame 36, so that when the components are matched, the magnetic conduction barrel 34 is in contact with the metal cup 37, so that the arc extinguishing chamber 7, the insulating base plate 6, the yoke plate 5, the wire frame 36 and the magnetic conduction barrel 34 are axially fastened, the wire frame 36 is suspended, and a margin can be reserved for micro deformation of the wire frame 36.

The following explains the operation principle of the contactor of the present embodiment with reference to fig. 1 to 4, as follows:

in the initial state of the contactor, the first elastic body 22 has a certain compression amount, and the lower wedge 23, the inclined reed 24 and the upper wedge 25 are axially extruded by the pretightening force generated by the compression amount; the second elastic body 31 has a certain compression amount, the movable iron core 32 is axially extruded by the pretightening force generated by the compression amount, the pushing rod 21 radially limits the lower wedge block 23, the inclined reed 24, the upper wedge block 25 and the movable iron core 32, and further, the lower wedge block 23, the inclined reed 24 and the upper wedge block 25 are all provided with inclined holes of 2 degrees to 6 degrees, so that the inclined state is clamped by the lower wedge block 23 and the upper wedge block 25 in the initial state of the inclined reed 24. Further, the movable iron core 32 is in clearance fit with the sliding sheet 33 and the magnetic conduction barrel 34, so that the radial deflection of the movable iron core 32 is avoided.

In the power-off releasing process of the contactor, the movable iron core 32 moves downwards under electromagnetic attraction force, the movable iron core 32 and the first clamp spring 26 are limited at the third shaft shoulder 213, the round chamfer of one end 242 contacted with the back of the inclined reed 24 is disconnected with the lower surface 11 of the corresponding contact, preferably, the round chamfer of two ends of the inclined reed 24 is R0.5-R4, so that the inclined reed 24 can be kept at the arc surface of the round chamfer when being disconnected with the lower surface of the corresponding contact, smooth contact surface transitional curvature is formed, attraction bounce and material abrasion are reduced, preferably, the center line position of the lower surface of the contact is finally separated from the inclined reed 24 when the inclined reed 24 is disconnected with the lower surface of the corresponding contact, the relative sliding contact point of the lower surface of the contact and the inclined reed 24 can move along the bus of the contact, the curvature of the contact point is over 0 and is smoothly graded, and the instability bounce phenomenon is greatly reduced; further, the movable spring part 2 continues to move downwards, at this time, the first elastic body 22 is extended, the inclined reed 24 gradually rotates to an inclined position under the pushing of the lower surface of the contact, and then is disconnected from the lower surface of the contact at the other side, so that time-sharing connection is realized. Further, the second elastic body 31 is stretched during the releasing process, the movable iron core 32 moves downwards and moves relatively to the sliding sheet 33, preferably, the sliding sheet 33 is made of a material with wear resistance and small friction coefficient, and further, the coil frame protruding plate 361 and the magnetic conductive tube 34 clamp and position the curled part of the sliding sheet 33, so that the sliding sheet 33 cannot deflect and fold during the relative sliding process, and the service life of the product is prolonged.

When the contactor is electrified and sucked, the movable iron core 32 is sucked under the action of electromagnetic attraction, the higher contact is closed firstly, the relative sliding contact point between the lower surface of the contact and the inclined reed 24 moves along a contact bus in the movement process, when the contact closed later is switched on, the contact point moves to the center line of the lower surface of the contact, and at the moment, the inclined reed 24 is restored to a horizontal state under the clamping action of the lower wedge block 23 and the upper wedge block 25.

Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the present utility model is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims (13)

1. The utility model provides a contactor, includes static contact subassembly and moving contact subassembly, the static contact subassembly with the joint and disconnection of moving contact subassembly can control the break-make of contactor, its characterized in that, moving contact subassembly includes:

a contact part (1) comprising contacts on both sides;

the movable spring part (2) comprises a push rod (21), a lower wedge block (23), a inclined reed (24) and an upper wedge block (25), wherein the lower wedge block (23), the inclined reed (24) and the upper wedge block (25) are sequentially stacked and then sleeved with the push rod (21), and the inclined reed (24) is clamped through the lower wedge block (23) and the upper wedge block (25) so that the inclined reed (24) has a certain inclined angle at an initial position;

the iron core part (3) comprises a movable iron core (32) which is positioned below the lower wedge block (23), and the movable iron core (32) is sleeved with the pushing rod (21);

when the fixed contact assembly and the movable contact assembly are connected, the movable iron core (32) moves downwards, one end of the pushing rod (21) drives the inclined reed (24) to contact with the lower surface of the contact on one side of the contact part (1), and then the inclined reed (24) rotates to a horizontal position to contact with the lower surface of the contact on the other side of the contact part (1).

2. The contactor according to claim 1, wherein: the lower surface (11) of the contact is an arc surface.

3. The contactor according to claim 2, wherein: the cambered surface is a spherical revolving body.

4. The contactor according to claim 1, wherein: the contact comprises a contact body part and a contact shoulder part (12), wherein the contact shoulder part (12) is arranged at the lower end of the corresponding contact, the cross section area of the contact shoulder part (12) is larger than the area of the lower surface of the contact body part, and the lower surface of the contact shoulder part (12) is the lower surface (11) of the contact.

5. The contactor according to claim 4, wherein: the contact shoulder (12) has a thickness of 1mm to 2mm.

6. The contactor according to claim 1, wherein: both ends (242) of the inclined reed (24) are provided with round chamfers.

7. The contactor according to claim 1, wherein: the movable spring part (2) further comprises a first elastic body (22) and a first clamp spring (26), the push rod (21) comprises a first shaft shoulder (211), a second shaft shoulder (212) and a third shaft shoulder (213) which are sequentially arranged from bottom to top, the first shaft shoulder (211) is sleeved with the first elastic body (22), the upper end of the first elastic body (22) is sleeved with a lower counter bore (233) of the lower wedge block (23), the inclined spring (24) and the upper wedge block (25) are sequentially stacked and then sleeved with the push rod (21) at the position of the second shaft shoulder (212), and the first clamp spring (26) is fixedly clamped with the third shaft shoulder (213) and tightly attached to the push rod (21) by compressing the first elastic body (22).

8. The contactor according to claim 7, wherein: the upper wedge block (25) comprises a limit fork (253), the lower wedge block (23) comprises a limit column (234), and the limit fork (253) is sleeved with the limit column (234) in an up-down sliding mode, so that the lower wedge block (23), the inclined reed (24) and the upper wedge block (25) are relatively and radially fixed, and can freely rotate around the push rod (21).

9. The contactor according to claim 7, wherein: the holes in the lower wedge block (23), the inclined reed (24) and the upper wedge block (25) for accommodating the pushing rod (21) are all inclined holes.

10. The contactor according to claim 9, wherein: the inclined hole is 2-6 degrees.

11. The contactor according to claim 9, wherein: the inner diameter r of the inclined hole is more than or equal to 1.1s multiplied by sin theta, wherein s is the thickness of the inclined reed (24), and theta is the inclination angle of the inclined reed (24) at the initial position.

12. The contactor according to claim 9, wherein: the first thick edge (231) of the lower wedge block (23) and the second thick edge (252) of the upper wedge block (25) are placed in a staggered mode.

13. The contactor according to claim 1, wherein: the iron core part (3) further comprises a second elastic body (31), a sliding sheet (33), a magnetic conduction barrel (34), a second clamp spring (35), a wire frame (36) and a metal cup (37), wherein the second elastic body (31) and the movable iron core (32) are tightly attached to the push rod (21), the movable iron core (32) can move up and down along the push rod (21) under the compression of the second elastic body (31), the second clamp spring (35) is arranged at the position where the lower end of the push rod (21) is used for limiting the lower edge of the movable iron core (32), the sliding sheet (33) is sleeved outside the movable iron core (32), the magnetic conduction barrel (34) is sleeved outside the sliding sheet (33), the wire frame (36) is sleeved outside the magnetic conduction barrel (34) and is arranged inside the metal cup (37), a wire frame convex plate (351) is arranged at the upper edge of the magnetic conduction barrel (34) and used for limiting the upper edge of the sliding sheet (34) and the position where the lower edge of the movable iron core (32) is located, the sliding sheet (33) is sleeved outside the magnetic conduction barrel (33), the sliding sheet (33) is kept stable when the magnetic conduction barrel (34) moves up and down, the lower edge of the magnetic conduction barrel (34) protrudes out of the lower edge of the wire frame (36), so that the lower edge of the magnetic conduction barrel (34) is in contact with the metal cup (37), and the lower edge of the wire frame (36) is suspended.