CN210535587U - Buffer system and direct current contactor with same - Google Patents

Abstract

The utility model relates to a high-voltage apparatus technical field, concretely relates to buffer system includes: the positioning piece penetrates through the armature along the vertical direction and is fixed on the iron core; the armature has a first position when in contact with the iron core and a second position when in contact with a buffer after being disconnected from the iron core; a stopper provided on the positioning member; the buffer piece is arranged between the stop piece and the armature and has a function of absorbing kinetic energy released when the armature moves from the first position to the second position. The utility model also provides an electromagnetic system, supplementary contact system and have its direct current contactor. The utility model discloses the effectual rigid collision between armature and the setting element of having solved and caused the serious cracked problem even of wearing and tearing of armature and setting element. Therefore, the stability and the reliability of the action characteristic and the working performance of the direct current contactor after 200 ten thousand mechanical lives are ensured.

Description

Buffer system and direct current contactor with same

Technical Field

The utility model relates to a high-voltage apparatus technical field, concretely relates to buffer system and have its direct current contactor.

Background

The high-voltage large-current direct current contactor is a contactor used in a direct current loop, is a control electrical appliance widely applied in the field of rail transit such as high-speed rails, subways and the like, and is mainly used for starting and stopping a traction motor. In view of the high requirements for operation safety in the rail traffic fields of high-speed rails, subways and the like, higher and higher requirements are also provided for a direct current contactor for controlling a traction motor: firstly, a direct current contactor is a control electric appliance which is frequently operated, and the mechanical life of the direct current contactor is long (up to 200 ten thousand times); secondly, the action characteristics and performance of the contactor within the mechanical service life range meet the requirements of safe, reliable and stable operation.

The current contactor for controlling the large current of the traction motor comprises a driving coil, an iron core, a magnet yoke, a counter force spring and an armature. When the driving coil is de-energized, the armature iron resets upwards under the action of the reaction spring, so that the brake-separating action is completed, and the stroke of the brake-separating is controlled by a positioning piece arranged on the armature iron. However, when the dc contactor performs a switching-off operation, the armature and the positioning element are rigidly collided, which easily causes increased wear and even breakage of the armature and the positioning element due to the rigid collision, thereby causing unreliable operation.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art armature and setting element because the rigid collision, and cause armature and the serious cracked defect even of wearing and tearing of setting element to provide an effective reduction armature wearing and tearing and cracked buffer system and have its direct current contactor.

In order to solve the technical problem, the utility model provides a buffer system, include:

the positioning piece penetrates through the armature along the vertical direction and is fixed on the iron core; the armature has a first position when in contact with the iron core and a second position when in contact with a buffer after being disconnected from the iron core;

a stopper provided on the positioning member;

the buffer piece is arranged between the stop piece and the armature and has a function of absorbing kinetic energy released when the armature moves from the first position to the second position.

Further, the buffer has a first face contacting the stopper and a second face contacting the armature.

Further, the included angle between the first surface and the second surface is an acute angle.

Further, still including setting up on the first face, be used for fixed the lug of bolster, the lug with stopper fixed connection.

Further, the lug is mushroom-shaped.

Further, the buffer member is made of a rubber material.

Further, the stopper includes:

a fixing plate in a U shape;

the two mounting holes are symmetrically formed in the fixing plate and used for mounting the buffer parts;

and the connecting holes are formed between the two mounting holes, and the stop piece is detachably connected with the positioning piece through the connecting holes.

The utility model also provides a direct current contactor, which comprises the buffer system; the system also comprises an electromagnetic system and an auxiliary contact system.

Further, the electromagnetic system comprises: the armature, the iron core, the demagnetizing sheet and the magnetic yoke are sequentially arranged along the vertical direction.

Further, the auxiliary contact system comprises:

the push rod is arranged on the base and is fixedly connected with the base;

and the auxiliary contact device is arranged below the base, and when the armature moves from the second position to the first position, the push rod is abutted against the auxiliary contact device and is used for transmitting an electric signal.

Furthermore, the device also comprises a limiting structure; the limit structure comprises:

the limiting piece is arranged on the push rod;

and the limiting groove is arranged on the base and is suitable for the limiting piece to be inserted into so as to limit the push rod to move relative to the base.

Further, the push rod includes:

the limiting piece is arranged on the supporting frame, and the longitudinal section of the supporting frame is triangular;

the connecting plate is arranged at one end of the support frame, and reinforcing ribs are arranged on the connection of the connecting plate and the support frame.

Furthermore, two inclined planes are symmetrically arranged on the end part of the connecting plate far away from the supporting frame.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a buffer system, which comprises a positioning piece, a magnetic core and a magnetic core, wherein the armature passes through the positioning piece along the vertical direction and is fixed on the magnetic core; the armature has a first position when in contact with the iron core and a second position when in contact with a buffer after being disconnected from the iron core; a stopper provided on the positioning member; the buffer piece is arranged between the stop piece and the armature and has a function of absorbing kinetic energy released when the armature moves from the first position to the second position. When the power is cut off, the armature rapidly moves from the first position to the second position to impact the buffer system, and due to the arrangement of the buffer piece, the buffer piece can effectively absorb the kinetic energy released when the armature moves from the first position to the second position. The problem of serious abrasion and even breakage of the armature and the positioning piece caused by rigid contact between the armature and the positioning piece is solved. Therefore, the stability and the reliability of the action characteristic and the working performance of the direct current contactor after 200 ten thousand mechanical lives are ensured.

2. The utility model provides a buffer system, the bolster have with the first face of stopper contact and with the second face of armature contact. When the armature moves from the first position to the second position, the upper surface of the armature is in close contact with the second surface, so that the kinetic energy released by the armature is fully absorbed.

3. The utility model provides a buffer system is still including setting up in the first face, be used for fixing the lug of bolster, the lug with stopper fixed connection. Through the arrangement of the convex block, the buffer piece is convenient to be fixed on the stop piece.

4. The utility model provides a direct current contactor, electromagnetic system includes: the armature, the iron core, the demagnetizing sheet and the magnetic yoke are sequentially arranged along the vertical direction. The demagnetizing sheet is arranged between the iron core and the magnetic yoke, so that the direct impact of the armature on the demagnetizing sheet when an electromagnetic system is in attraction is avoided, the mechanical abrasion and brittle fracture of the demagnetizing sheet caused by impact are avoided, and the basic requirement of the action characteristic of a product in 200-ten-thousand mechanical life tests is ensured.

5. The utility model provides a direct current contactor, limit structure includes: the limiting piece is arranged on the push rod; and the limiting groove is arranged on the base and is suitable for the limiting piece to be inserted into so as to limit the push rod to move relative to the base. Through the arrangement of the limiting groove and the limiting part, the push rod and the auxiliary contact device are prevented from generating relative displacement when the push rod is in contact with the auxiliary contact device, and therefore the reliability and the stability of the auxiliary contact system during the working operation of the direct current contactor are guaranteed.

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 structural diagram of a dc contactor provided by the present invention;

FIG. 2 is a schematic diagram of the buffering system of FIG. 1;

FIG. 3 is a schematic view of the stopper of FIG. 2;

FIG. 4 is a schematic view of the buffer of FIG. 2;

FIG. 5 is a schematic structural view of the positioning member shown in FIG. 2;

FIG. 6 is a schematic structural view of the push rod of FIG. 1;

FIG. 7 is a schematic structural view of the base of FIG. 1;

FIG. 8 is a schematic structural view of the base engaged with the push rod;

description of reference numerals:

1-a stop; 2, fixing a plate; 3-mounting holes; 4-connecting holes; 5-a buffer member; 6-first side; 7-a second face; 8-a bump; 9-a positioning member; 10-an armature; 11-an iron core; 12-degaussing the disks; 13-a fastener; 14-a magnetic yoke; 15-a base; 16-a push rod; 17-a limit stop; 18-a limiting groove; 19-a support frame; 20-a connecting plate; 21-reinforcing ribs; 22-auxiliary contact means; 23-a rocker arm; 24-a rolling wheel; 25-a counter force spring; 26-a mounting plate; 27-a coil; 28-inclined plane; 29-a nut;

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.

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.

As shown in fig. 1 to 8, a damping system provided in the embodiment of the present invention includes a positioning member 9, which passes through an armature 10 in a vertical direction and is fixed on an iron core 11; the armature 10 has a first position when the armature is attracted to the iron core 11 and a second position when the armature 10 is disconnected from the iron core 11 and contacts with the buffer 5; a stopper 1 provided on the positioning member 9; and the buffer piece 5 is arranged between the stop piece 1 and the armature 10, and the buffer piece 5 is used for absorbing kinetic energy released when the armature 10 moves from the first position to the second position.

The positioning member 9 is made of stainless steel, and in this embodiment, as shown in fig. 5, the positioning member 9 is T-shaped, a through hole is formed in the center of the positioning member 9, and the fastening member 13 penetrates through the through hole to fix the stop member 1 and the positioning member 9 on the iron core 11, so as to be fixedly connected with the iron core 11. In the present embodiment, the fastener 13 is a screw. The first position is a position where the armature 10 is located when the armature 10 is attracted to the iron core 11, and the second position is a position where the armature 10 is in contact with the buffer 5 when the armature 10 is disconnected from the iron core 11. When the power is off, the iron core 11 eliminates the suction force on the armature 10, so that under the action of the counterforce spring 25, the armature 10 rapidly moves from the first position to the second position, and then impacts the buffer system, and as the buffer piece 5 is made of rubber materials, the buffer piece 5 can effectively absorb the kinetic energy released when the armature 10 moves from the first position to the second position. The rigid collision between the armature 10 and the positioning piece is avoided, so that the stability and the reliability of the action characteristic and the working performance of the direct current contactor after 200 ten thousand mechanical lives are ensured.

As shown in fig. 3 to 4, the buffer 5 has a first surface 6 contacting the stopper 1 and a second surface 7 contacting the armature 10, and an angle formed by the second surface 7 and a plane of the core 11 is identical to an angle formed by a plane of the armature 10 in the second position and a plane of the core 11. So that the upper surface of the armature 10 may be in full contact with the second face 7 when the armature 10 moves from the first position to the second position, thereby fully absorbing the kinetic energy released by the armature 10. In this embodiment, the longitudinal section of the buffer 5 is a right trapezoid, the first surface 6 is the top surface of the buffer 5 and contacts the inner surface of the stopper 1, and the second surface is the bottom surface of the buffer 5 and forms an acute angle with the first surface 6 and the second surface 7. The included angle between the first surface 6 and the second surface 7 is an acute angle, so that the second surface 7 is tightly attached to the armature 10, and the included angle between the first surface 6 and the second surface 7 needs to be set according to the actual condition of the armature 10.

The first surface 6 is provided with a projection 8 for fixing the buffer member 5, and the projection 8 is fixedly connected with the stopper 1. The stop piece 1 comprises a fixing plate 2 which is U-shaped; two mounting holes 3 are symmetrically formed in the fixing plate 2 and used for mounting the buffer parts 5; and the connecting holes 4 are formed between the two mounting holes 3, and the stop piece 1 is detachably connected with the positioning piece 9 through the connecting holes 4.

In the present embodiment, the buffer members 5 are two that are symmetrically disposed at both ends of the fixed plate 2. The bumps 8 are arranged in mushroom shapes, and the bumps 8 and the buffer member 5 are formed by injection molding and pressing of polyurethane rubber, so that certain elasticity is provided, the bumps 8 can be directly mounted in the two mounting holes 3 on the retainer 1, and the buffer member 5 is fixed on the fixing plate 2. And set fixed plate 2 to the U type, be convenient for fixed plate 2 abundant with bolster 5's contact to wrap up bolster 5 in fixed plate 2, played better fixed effect. Meanwhile, the connecting hole 4 is arranged to facilitate the fastening piece 13 to penetrate through the stopping piece 1 and the positioning piece 9, so that the stopping piece 1 is fixed above the positioning piece 9.

In the present embodiment, the aperture of the through hole formed in the armature 10 is larger than the aperture of the connection hole 4 through which the positioning member 9 passes. The positioning piece 9 and the armature 10 are in movable fit, so that friction between the hole wall of the through hole in the armature 10 and the peripheral wall of the positioning piece 9 is prevented, and the armature 10 is convenient to move from the first position to the second position or from the second position to the first position, and the friction resistance in the movement process is reduced.

As shown in fig. 1, the present invention further provides a dc contactor, which comprises the buffer system; the system also comprises an electromagnetic system and an auxiliary contact system. Wherein the damping system is arranged above the electromagnetic system.

In this embodiment, the electromagnetic system includes: the armature 10, the iron core 11, the coil 27 sleeved on the outer peripheral wall of the iron core 11, the demagnetizing sheet 12 and the magnetic yoke 14 are sequentially arranged along the vertical direction. The demagnetizing sheets 12 are arranged between the iron core 11 and the magnetic yoke 14 and fixed on the mounting plate 26 through fasteners 13, wherein the demagnetizing sheets 12 and the fasteners 13 are made of non-magnetic metal materials and have strong tensile and compressive mechanical strength. The direct impact of the armature 10 on the demagnetizing sheet 12 in the attracting process of an electromagnetic system is avoided, so that the mechanical abrasion and brittle fracture of the demagnetizing sheet 12 caused by motion impact are avoided, and the basic requirement of the action characteristic of the product in 200 ten thousand mechanical life tests is ensured.

As shown in fig. 6-8, the auxiliary contact system includes: the push rod 16 is arranged on the base 15 and is fixedly connected with the base 15; and the auxiliary contact device 22 is arranged below the base 15 and close to the iron core 11, and when the armature 10 moves to the first position, the push rod 16 is abutted against the auxiliary contact device 22 and is used for transmitting an electric signal whether the armature 10 is attracted with the iron core 11 or is disconnected. The base 15 is provided on the armature 10 at an end remote from the reaction spring 25, and the push rod 16 is fixed to the base 15 by fastening the base to the nut 29 via the fastening member 13. In the present embodiment, the limiting groove 18 is disposed on the base 15, and the limiting member 17 is disposed on the push rod 16, in the present embodiment, the limiting groove 18 is a dovetail groove, and the limiting member 17 is a dovetail boss. The push rod 16 comprises a support frame 19, and the longitudinal section of the support frame 19 is triangular; the connecting plate 20 is arranged at one end of the supporting frame 19, and a reinforcing rib 21 is arranged at the joint of the connecting plate 20 and the supporting frame 19. The reinforcing ribs 21 play a role in supporting connection, so that the connection between the support frame 19 and the connecting plate 20 is more stable. Two inclined planes 28 are symmetrically arranged on the end of the connecting plate 20 far away from the supporting frame 19. The inclined surface 28 is a smooth inclined surface, and when the armature 10 moves from the first position to the second position, the inclined surface 28 on the push rod 16 contacts with the rolling wheel 24 on the rocker 23 in the auxiliary contact device 22 to generate rolling friction, so that an on-off signal of the auxiliary contact device 22 is transmitted. Because the limiting member 17 is embedded in the limiting groove 18 on the base 15 and is tightly matched with the limiting groove 18, the push rod 16 does not generate relative displacement due to the stress of the inclined surface 28 on the push rod 16, thereby ensuring the reliability and stability of the auxiliary contact device 22 during the operation of the dc contactor.

As an alternative embodiment, the limit groove 18 is provided on the push rod 16, and the limit member 17 is provided on the base 15.

The specific working process is as follows: when the dc contactor is energized, the coil 27 generates an electromagnetic force and attracts the armature 10 from the second position to the first position, thereby moving the base 15 towards the auxiliary contact system and thereby conducting an electrical signal. When the dc contactor is powered off, the armature 10 is rapidly moved from the first position to the second position by the reaction spring 25, so as to impact the damping system, and the damping member 5 can effectively absorb the kinetic energy released when the armature 10 moves from the first position to the second position.

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 (13)

1. A cushioning system, comprising:

the positioning piece (9) penetrates through the armature (10) along the vertical direction and is fixed on the iron core (11); the armature (10) is provided with a first position when the armature is attracted with the iron core (11) and a second position when the armature (10) is disconnected with the iron core (11) and is contacted with a buffer piece (5);

a stopper (1) provided on the positioning member (9);

a buffer (5) disposed between the stop (1) and the armature (10), the buffer (5) having a surface for absorbing kinetic energy released when the armature (10) moves from the first position to the second position.

2. The damping system according to claim 1, characterized in that the damping element (5) has a first face (6) in mounting contact with the stop element (1) and a second face (7) in contact with the armature (10).

3. Cushioning system according to claim 2, characterized in that the first face (6) and the second face (7) are at an acute angle.

4. The damping system according to claim 2, further comprising a projection (8) provided on the first face (6) for fixing the damping element (5), the projection (8) being fixedly connected to the stop element (1).

5. Cushioning system according to claim 4, characterized in that the bumps (8) are mushroom-shaped.

6. Cushioning system according to any one of claims 1-5, characterized in that the cushioning element (5) is made of a rubber material.

7. Cushioning system according to claim 6, characterized in that the stop (1) comprises:

a fixing plate (2) in a U shape;

the two mounting holes (3) are symmetrically formed in the fixing plate (2) and used for mounting the buffer piece (5);

connecting holes (4) are formed between the mounting holes (3), and the stop piece (1) is detachably connected with the positioning piece (9) through the connecting holes (4).

8. A dc contactor comprising a snubber system as claimed in any one of claims 1 to 7; the system also comprises an electromagnetic system and an auxiliary contact system.

9. The dc contactor as recited in claim 8, wherein said electromagnetic system comprises: the armature (10), the iron core (11), the demagnetizing sheet (12) and the magnetic yoke (14) are sequentially arranged along the vertical direction.

10. The dc contactor as claimed in claim 8, wherein said auxiliary contact system comprises:

the push rod (16) is arranged on the base (15) and is fixedly connected with the base (15);

and the auxiliary contact device (22) is arranged below the base (15), and when the armature (10) moves from the second position to the first position, the push rod (16) is abutted against the auxiliary contact device (22) and is used for transmitting an electric signal.

11. The dc contactor as claimed in claim 10, further comprising a position limiting structure; the limit structure comprises:

the limiting piece (17) is arranged on the push rod (16);

and the limiting groove (18) is arranged on the base (15) and is suitable for being inserted by the limiting piece (17) to limit the push rod (16) to move relative to the base (15).

12. The direct current contactor according to claim 11, characterized in that the push rod (16) comprises:

the limiting piece (17) or the limiting groove (18) is arranged on the supporting frame (19), and the longitudinal section of the supporting frame (19) is triangular;

the connecting plate (20) is arranged at one end of the supporting frame (19), and a reinforcing rib (21) is arranged at the joint of the connecting plate (20) and the supporting frame (19).

13. The direct current contactor according to claim 12, characterized in that two bevels (28) are symmetrically provided on the end of the connection plate (20) remote from the support frame (19).

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